Patent Description:
A humidifier is an apparatus that evaporates water and emits humidified air with a high moisture content. A humidifier can create humidified air by evaporating water through natural evaporation, heated evaporation, or ultrasonic vibration.

Each evaporation method has its advantages and disadvantages. In the case of natural evaporation, there is a problem that a user must frequently manage the humidifying medium used.

In the case of evaporation by ultrasonic vibration, there are problems in that the humidified air may not flow actively into the indoor space by atomizing the supplied water with ultrasonic vibration, in that unpleasant humidified air may flow into the indoor space when unsterilized water is humidified, and in that ultrasonic vibrator is vulnerable to high temperature heat.

In the case of heating evaporation, safety accidents may occur if hot humidified air is discharged directly.

Korean registered patent <CIT> discloses a humidifier that humidifies water supplied from a water tank by heating and ultrasonic vibration.

However, the prior document discloses a structure in which a water heating space and a humidifying space are connected to each other. This causes a problem that the water cannot be completely sterilized when the water heating temperature is maintained below a set temperature in consideration of an ultrasonic vibrator. In addition, when water is heated to sterilize and sent to the ultrasonic vibrator, there is a problem that the ultrasonic vibrator may malfunction. That is, in the case of prior document, there is difficulty in completely sterilizing and humidifying water.

In addition, if a heater for heating and a vibrator for humidification are disposed in the same space, a problem that water that is not completely heated may be humidified may occur.

<CIT> discloses a humidifier configured to generate humidified air by using water supplied from the first humidifying water tank by using an ultrasonic vibrator.

The invention is specified by the independent claim. The invention has been made in view of the above problems, and provides a humidifier that humidifies water completely sterilized through heating.

In addition, the invention further provides a humidifier in which a vibrator inside a humidifying water tank supplied with high-temperature heated water can operate stably.

In addition, the invention may further provide a humidifier that can cool high-temperature heated water flowing into a humidifying water tank.

In addition, the invention may further provide a humidifier that discharges humidified air by using water from which ions in water are removed and pure clean water sterilized by heating.

In addition, the invention may further provide a humidifier that can stably maintain the water level inside a first humidifying water tank that heats water and a second humidifying water tank that humidifies water.

In addition, the invention may further provide a humidifier that can stably operate through information on the temperature or water level of water in a first humidifying water tank and water in a second humidifying water tank.

In accordance with an aspect of the present invention, a humidifier includes: a tank which stores water; a first humidifying water tank which is disposed in a lower side of the water tank, and heats water supplied from the water tank by using a heater; a second humidifying water tank which is disposed in a lower side of the water tank, and generates humidified air by using water supplied from the first humidifying water tank by using a vibrator; a first connection pipe connecting the first humidifying water tank and the second humidifying water tank; a first valve which opens and closes a flow path connecting the water tank and the first humidifying water tank; a second valve which opens and closes the first connection pipe; and a first temperature sensor which detects a temperature of water inside the first humidifying water tank, wherein the second valve opens the first connection pipe, when the temperature of water detected by the first temperature sensor is equal to or higher than a first set temperature, so that humidified air can be generated by using completely sterilized water.

When the second valve opens the first connection pipe, water in the first humidifying water tank flows into the second humidifying water tank due to a difference between a water level of the first humidifying water tank and a water level of the second humidifying water tank, so that water heated in the second humidifying water tank can be supplied to the humidifier without the need for a separate pump.

The first valve is disposed closer to the first humidifying water tank than the second humidifying water tank, so that a flow path through which heated water flows into the second humidifying water tank can be secured. The water flowing into the second humidifying water tank may be partially cooled.

The humidifier further includes a second temperature sensor which detects a temperature of water stored inside the second humidifying water tank, and the vibrator operates, when the temperature of water in the second humidifying water tank detected by the second temperature sensor is below a set temperature, thereby preventing the vibrator from operating at high temperatures.

The humidifier further includes a first water level sensor which detects a water level inside the first humidifying water tank, and the first valve stops water supplied to the first humidifying water tank, when the water level detected by the first water level sensor is equal to or higher than a first set water level.

A fan, which supplies air to the second humidifying water tank, operates, when the heater heats water stored in the first humidifying water tank.

In the first humidifying water tank, an outlet hole is formed in a portion connected to the first connection pipe, and the first temperature sensor is disposed in a position equal to or lower than the outlet hole, even when the water in the first humidifying water tank flows as much as possible into the second humidifying water tank, the temperature sensor can detect the water temperature in the first humidifying water tank.

The humidifier further includes a second water level sensor which detects a water level inside the second humidifying water tank, and the second valve opens the first connection pipe, when a level difference between water stored inside each of the first humidifying water tank and the second humidifying water tank detected by the first water level sensor and the second water level sensor is formed.

Operation of the vibrator is stopped, when water level stored in the second humidifying water tank detected by the second water level sensor is lower than a set water level, thereby preventing the vibrator from being damaged by operating the vibrator when a certain water level is not formed.

The second humidifying water tank includes a water level sensor cover disposed between the second water level sensor and the vibrator, thereby improving the accuracy of the second water level sensor.

The second valve opens the first connection pipe for a set time, so that the water supplied to the second humidifying water tank can be adjusted.

The humidifier further includes a second temperature sensor which detects a temperature of water stored inside the second humidifying water tank, and the vibrator operates, when the temperature of water inside the second humidifying water tank detected by the second temperature sensor is below a set temperature, thereby preventing the vibrator from operating at high temperatures.

In the second humidifying water tank, an inlet hole is formed in a portion connected to the first connection pipe, and the second temperature sensor is disposed at the same height as the inlet hole or at a lower height than the inlet hole, so that the temperature of the water flowing from the first humidifying water tank can be quickly detected.

The humidifier further includes a second connection pipe which is spaced apart from the first connection pipe, and connects the first humidifying water tank and the second humidifying water tank; and a pump which supplies water stored inside the second humidifying water tank to the first humidifying water tank through the second connection pipe, wherein the pump operates after the vibrator stops operating, so that when the generation of humidified air is completed, water can be returned to the first humidifying water tank.

The pump operates in consideration of a water level inside the first humidifying water tank detected by the first water level sensor and a water level inside the second humidifying water tank detected by the second water level sensor, thereby preventing water from being recovered beyond the range in which the first humidifying water tank can store.

The humidifier further include a water softener which is disposed inside the water tank, and removes ion from water discharged from the water tank; a supply pipe which connects the water tank and the first humidifying water tank; and a detection sensor which detects a quality of water stored inside the supply pipe, and the first valve is disposed in one end of the supply pipe, and controls water supplied to the first humidifying water tank, so that humidified air can be generated by heating water from which ions are removed.

The first valve supplies water to the first humidifying water tank, when the quality of water detected by the detection sensor is equal to or higher than a set level, so that humidified air can be generated by heating water from which ions are removed.

In accordance with another aspect of the present invention, a humidifier includes: a first humidifying water tank in which a first chamber to heat water stored therein is formed; a second humidifying water tank in which a second chamber which generates humidified air by using water stored therein is formed; and a connection pipe which supplies the water heated in the first humidifying water tank to the second humidifying water tank, wherein the second humidifying water tank includes: a second humidifying water tank wall which forms the second chamber; a vibrator which is disposed in a lower side of the second humidifying water tank wall, and atomizes water stored in the second chamber; and a temperature sensor which detects a temperature of the water stored in the second chamber, wherein the vibrator operates, when the temperature detected by the temperature sensor is below a set temperature, thereby preventing the vibrator from operating in the presence of high temperature heated water.

The second humidifying water tank further comprises a water level sensor which detects a water level inside the second humidifying water tank, and the vibrator operates when the water level in the second humidifying water tank is equal to or higher than a set water level, thereby preventing the vibrator from operating in a state where the water level is not secured, as the vibrator operates.

In accordance with another aspect of the present invention, a humidifier includes: a first humidifying water tank in which a first chamber to heat water stored therein is formed; a second humidifying water tank in which a second chamber which generates humidified air by using water stored therein is formed; a connection pipe which supplies the water heated in the first humidifying water tank to the second humidifying water tank; and a valve which opens and closes the connection pipe, wherein the first humidifying water tank includes: a first humidifying water tank wall which forms the first chamber; and a heater which is disposed in a lower side of the first humidifying water tank wall, and heat water stored in the first chamber, wherein the heater operates when the valve closes the connection pipe, so that completely heated and sterilized water can be supplied to the second humidifying water tank.

The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description in conjunction with the accompanying drawings, in which:.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and these embodiments are provided only to allow the invention of the present invention to be complete, and to completely inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, and the present invention is only defined by the scope of the claims.

Hereinafter, the present invention will be described with reference to the drawings for explaining a humidifier according to embodiments of the present invention.

First, the overall configuration of a humidifier of the present invention will be described with reference to <FIG>.

The humidifier of the present invention may humidify water by using ultrasonic vibration. The humidifier of the present invention may discharge humidified air by heating water. The humidifier of the present invention may discharge humidified air generated by ultrasonic vibration and humidified air generated by heating.

Referring to <FIG>, the humidifier may include a case <NUM> that forms an outer shape and has an inlet 24a and an outlet 12a, a filter device that is disposed inside the case <NUM> and filters the air flowing into the inlet 24a, a blower <NUM> that is disposed inside the case <NUM> and flows the air inside the case <NUM> from the inlet 24a to the outlet 12a, and a humidifying module that is disposed inside the case <NUM> and humidifies a portion of the air flowing to the blower <NUM>.

The humidifying module may include a first humidifying water tank <NUM> that heats water and a second humidifying water tank <NUM> that generates humidified air by using water. The humidifying module may include a humidifying module housing <NUM> that covers the circumference of the first humidifying water tank <NUM> and the second humidifying water tank <NUM>. A flow path housing <NUM> may be disposed in the outer circumference of the humidifying module housing <NUM>. A blowing flow path <NUM> may be formed between the humidifying module housing <NUM> and the flow path housing <NUM>. The configuration and arrangement of the humidifying module will be described in detail below.

The case <NUM> may have an overall cylindrical shape.

The case <NUM> may include a suction grill <NUM> forming an inlet 24a through which air flows in, and a discharge grill <NUM> forming an outlet 12a through which air is discharged.

The inlet 24a may be formed on the circumferential surface of the case <NUM> having a cylindrical shape. The outlet 12a may be formed on the upper surface of the case <NUM> having a cylindrical shape. The humidifier of the present invention may flow air into the circumferential surface and discharge air to the upper surface.

Referring to <FIG>, the suction grill <NUM> may cover the outside of a filter <NUM> and a blower housing <NUM> which will be described below. A plurality of inlets 24a may be formed, in the suction grill <NUM>, in the vertical direction and spaced apart in the circumferential direction. The inlet 24a may be formed around where the filter <NUM> is disposed. The inlet 24a may be formed in the lower portion of the suction grill <NUM>. The inlet 24a may be formed in the lower portion of the suction grill <NUM>, and the upper portion of the suction grill <NUM> may be formed closed to protect the internal component of the humidifier.

A plurality of grills 24b extending in the up-down direction are disposed in the suction grill <NUM>. The plurality of grills 24b may be disposed to be spaced apart in the circumferential direction of the suction grill <NUM>. A plurality of inlets 24a may be formed between the plurality of grills 24b.

The suction grill <NUM> may be divided into a suction grill lower portion 25a in which the inlet 24a is formed, and a suction grill upper portion 25b disposed in the upper side of the suction grill lower portion 25a. A display <NUM>, which will be described below, may be disposed in the suction grill upper portion 25b. The suction grill upper portion 25b may cover the blower housing <NUM> and the outside of the humidifying module described below.

The humidifier may include a discharge grill <NUM> forming the outlet 12a and a water tank cover <NUM> disposed in the upper side of the water tank <NUM>. The discharge grill <NUM> may have a structure that is separated upward from an outer shell <NUM> described below. The water tank cover <NUM> may have a structure that is separated from the discharge grill <NUM> or the water tank <NUM>. The discharge grill <NUM> may include a plurality of ribs 12b extending in a radial direction from the outer circumference of the water tank cover <NUM>. The plurality of ribs 12b disposed in the discharge grill <NUM> may be disposed to be spaced apart in the circumferential direction in the outer circumference of the water tank cover <NUM>.

Referring to <FIG>, the water tank cover <NUM> may include a central cover <NUM> and a peripheral cover <NUM> disposed around the central cover <NUM>. The central cover <NUM> may have a structure that is convex upward as it progresses toward a center. A water supply hole <NUM> through which water flows into the water tank <NUM> may be formed between the peripheral cover <NUM> and the central cover <NUM>.

Referring to <FIG>, the discharge grill <NUM> may be disposed above a first discharge flow path <NUM> and a second discharge flow path <NUM> which will be described below. A plurality of ribs 12b and a plurality of outlets 12a may be formed in the discharge grill <NUM>.

The discharge grill <NUM> may have a constant height in the up-down direction. Accordingly, a mixing passage <NUM> may be formed between the plurality of ribs 12b disposed in the discharge grill <NUM>. In the mixing passage <NUM>, the air flowing through the first discharge flow path <NUM> and the air flowing through the second discharge flow path <NUM> may be mixed.

In each of the plurality of ribs 12b, the height of the outer circumferential end is formed to be higher than the height of the inner peripheral end. Accordingly, the air flowing through the first discharge flow path <NUM> and the second discharge flow path <NUM> can be guided inward in the radial direction.

The case <NUM> may include an outer shell <NUM> that guides air flowing inside to the outlet 12a. The outer shell <NUM> may form an inner shell <NUM> and the second discharge flow path <NUM> which will be described below.

The outer shell <NUM> includes an upper outer shell 22a disposed below the discharge grill <NUM> and a lower outer shell 22b disposed below the upper outer shell 22a. The lower outer shell 22b may be formed of a transparent material.

The case <NUM> may include a lower wall <NUM> that covers the lower side of the suction grill <NUM>.

The humidifier may include a pedestal <NUM> that is disposed on the lower side of the case <NUM> and spaced apart from the lower wall <NUM> by a certain distance from the ground. The upper end of the pedestal <NUM> may be connected to the lower wall <NUM>. The lower wall <NUM> is disposed to cover the lower surface of the humidifier spaced upward from the ground by the pedestal <NUM>.

Referring to <FIG>, a display <NUM> is disposed in one side of the case <NUM>. The display <NUM> allows a user to control the power or operation of the humidifier. A display that displays the operating state of the humidifier to a user may be disposed in the display <NUM>.

The filter device may filter the air introduced through the inlet 24a through the filter <NUM>. The filter device may flow the filtered air upward.

Referring to <FIG>, the filter device includes a filter <NUM> that filters the air flowing into the inlet 24a, and a filter mounter that fixes the disposition of the filter <NUM> inside the case <NUM>.

The filter <NUM> may have a cylindrical shape. Accordingly, the filter <NUM> may filter the air sucked from the front, rear, left, and right directions perpendicular to the up-down direction. The air introduced from the inlet 24a may flow into the inner space of the filter <NUM>. The air passed through the filter <NUM> may flow to the blower <NUM> disposed in the upper side of the filter <NUM>.

The filter mounter includes a lower plate <NUM> disposed in the lower side of the filter <NUM>, an upper plate <NUM> disposed in the upper side of the filter <NUM>, and a supporter connecting the lower plate <NUM> and the upper plate <NUM>.

The lower plate <NUM> is disposed in the lower side of the filter <NUM>. The lower plate <NUM> moves up and down, and may detect whether the filter <NUM> is disposed. A fan sterilizing device <NUM> that irradiates ultraviolet light upward may be disposed in the center of the lower plate <NUM>. The fan sterilizing device <NUM> may sterilize the inside of a fan <NUM> described below or the filter <NUM>.

An orifice <NUM> may be formed in the upper plate <NUM>. The orifice <NUM> may be formed in the center of the upper plate <NUM>. The orifice <NUM> may allow the air flowed into the inner side of the filter <NUM> to flow to the fan <NUM>.

The inner circumferential end of the upper plate <NUM> has a shape bent upward, so that air flowing upward in the inner space of the filter <NUM> can be guided to the fan <NUM>.

The supporter may connect the lower plate <NUM> and the upper plate <NUM>. The supporter may be disposed to be spaced apart in the circumferential direction.

The blower <NUM> includes a fan <NUM> that generates airflow inside the case <NUM>, and a fan motor <NUM> that rotates the fan <NUM>.

Referring to <FIG>, the fan <NUM> may form a fan suction port in one side toward the orifice <NUM>, and may form a fan discharge port in a direction opposite to the fan suction port. The fan <NUM> may be a mixed flow fan whose fan discharge outlet faces the centrifugal direction in the direction opposite to the fan suction port. The fan <NUM> may include a hub connected to the fan motor <NUM>, a shroud that is disposed spaced apart from the hub by a certain distance and forms the fan suction port, and a blade extending in a radial direction to connect the hub and the shroud.

The fan <NUM> may operate to send air from the lower side upward. The fan <NUM> sucks air into the orifice <NUM> and discharges the air to the blower housing <NUM> where the diffuser <NUM> is disposed.

The fan motor <NUM> may be disposed above the fan <NUM>.

The blower device includes a motor cover <NUM> that covers the outside of the fan motor <NUM>, and a blower housing <NUM> that is disposed to be spaced radially outward from the motor cover <NUM> and guides the air flowing by the fan <NUM> upward.

A blowing flow path <NUM> through which air flowing by the fan <NUM> flows upward may be formed between the motor cover <NUM> and the blowing housing <NUM>. The blowing flow path <NUM> may extend to an area where the humidifying module housing <NUM> and the flow path housing <NUM> are formed.

The suction grill <NUM> may be disposed in the outside of the blower housing <NUM>.

The blower <NUM> includes a diffuser <NUM> that is disposed between the motor cover <NUM> and the blower housing <NUM> and reduces the rotational component of air flowing upward by the fan <NUM>. A plurality of diffusers <NUM> may be disposed to be spaced apart in the circumferential direction.

A control box <NUM> may be disposed in the upper side of the motor cover <NUM> to form a space in which the circuit board <NUM> is disposed. The control box <NUM> may be disposed to be spaced apart from the inside of the blower housing <NUM>. Therefore, the blowing flow path <NUM> may be formed in a space between the control box <NUM> and the blowing housing <NUM>.

A plurality of circuit boards <NUM> may be disposed inside the control box <NUM>.

Hereinafter, with reference to <FIG>, the configuration of forming the discharge flow path of the present invention and the configuration of the water tank <NUM> for storing water will be described.

The humidifier includes a water tank <NUM> that forms a space for storing water, an inner shell <NUM> spaced apart from the outer circumference of the water tank <NUM>, and an outer shell <NUM> spaced apart from the outer circumference of the inner shell <NUM>. The humidifier includes a water tank cover <NUM> disposed in the upper side of the water tank <NUM>.

The water tank <NUM> includes an inner water tank <NUM> that forms a space in which water is stored, and an outer water tank <NUM> disposed to cover the outside of the inner water tank <NUM>. The inner water tank <NUM> may be disposed inside the outer water tank <NUM>. When the inner water tank <NUM> is disposed inside the outer water tank <NUM>, the outer circumferential surface of the inner water tank <NUM> may be disposed to be in contact with the inner circumferential surface of the outer water tank <NUM>.

Referring to <FIG>, the inner water tank <NUM> includes an inner water tank body <NUM> that forms a space in which water is stored, a handle <NUM> disposed in the upper side of the inner water tank body <NUM>, and a connector <NUM> that is disposed in the lower side of the inner water tank body <NUM> and connects the inner water tank body <NUM> with a supply pipe <NUM> (see <FIG>) described below.

Referring to <FIG>, a water softener <NUM> is disposed inside the inner water tank <NUM> to harden the water inside the inner water tank <NUM>. The water softener <NUM> includes a water softener housing <NUM> that forms a space in which an ion exchange resin filter (not shown) is disposed therein, and a housing cover <NUM> that covers the upper side of the water softener housing <NUM>.

A plurality of cover holes 150b may be formed in the housing cover <NUM>, and a plurality of housing holes (not shown) may be formed in the water softener housing <NUM>.

The inner water tank body <NUM> may be formed in a substantially cylindrical shape. The inner water tank body <NUM> may have a shape having an open upper side. A lower hole <NUM> through which water stored in the lower surface is discharged may be formed in the inner water tank body <NUM>. Referring to <FIG>, the inner water tank body <NUM> may have a shape in which the inner diameter of the water tank decreases from the upper side to the lower side.

The lower hole <NUM> may be formed at the center of the lower surface of the inner water tank body <NUM>. The connector <NUM> may be fixedly disposed in the lower hole <NUM>. Water stored in the inner water tank <NUM> may flow to the supply pipe <NUM> through the connector <NUM> mounted in the lower hole <NUM>.

The handle <NUM> includes a handle fixing portion <NUM> fixedly disposed in the upper end of the inner water tank body <NUM>, and a handle bar <NUM> disposed across the upper side of the inner water tank body <NUM>.

The handle fixing portion <NUM> may have a structure that hangs on the upper end of the inner water tank body <NUM>. In the handle fixing portion <NUM>, an area disposed inside the inner water tank body <NUM> may include an inclined wall <NUM> inclined to the inner and lower sides of the inner water tank body <NUM>. Therefore, water falling through the water tank cover <NUM> may flow into the inner water tank <NUM> along the inclined surface of the handle fixing portion <NUM>.

Referring to <FIG>, the connector <NUM> includes a connector body <NUM> disposed to penetrate the lower hole <NUM> of the inner water tank body <NUM>, a connector holder <NUM> that is coupled to the connector body <NUM> and fixes the arrangement of the connector body <NUM>, and a connector valve <NUM> that is disposed inside the connector body <NUM> and opens and closes the internal flow path of the connector body <NUM>.

Referring to <FIG>, the connector body <NUM> includes a connector plate <NUM> disposed inside the inner water tank body <NUM>, and a connector pipe <NUM> that is disposed to penetrate the lower hole <NUM> of the inner water tank body <NUM> and forms an internal flow path 128a in the inside. The connector plate <NUM> is disposed in the upper side of the lower surface of the inner water tank body <NUM>.

The connector plate <NUM> may have a structure that fixes the arrangement of the water softener <NUM> by contacting the lower portion of the water softener <NUM>. A fixing rib 126a, 126b protruding upward may be disposed in the connector plate <NUM>.

Referring to <FIG>, the fixing rib 126a, 126b may include a first fixing rib 126a and a second fixing rib 126b arranged to be radially spaced apart from the first fixing rib 126a. A lower protrusion <NUM> of the water softener <NUM> may be disposed in a space between the first fixing rib 126a and the second fixing rib 126b. The first fixing rib 126a and the second fixing rib 126b may prevent the water softener <NUM> disposed inside the inner water tank <NUM> from moving in a direction perpendicular to the up-down direction.

A border wall <NUM>, which is disposed radially outward from the fixing rib 126a, 126b and protrudes upward, may be disposed in the connector plate <NUM>. Referring to <FIG>, a hook hole 124a into which a hook <NUM> of the water softener <NUM> is inserted may be formed in the border wall <NUM>.

The connector pipe <NUM> may have a structure extending downward from the center of the connector plate <NUM>. The connector pipe <NUM> is disposed to penetrate the lower hole <NUM> of the inner water tank body <NUM>. The internal flow path 128a through which the water inside the inner water tank <NUM> flows may be formed inside the connector pipe <NUM>. The connector valve <NUM> that opens and closes the internal flow path 128a is disposed inside the connector pipe <NUM>.

The connector valve <NUM> may be disposed to move in the up-down direction inside the connector pipe <NUM>. When connected to the supply pipe <NUM> described below, the connector valve <NUM> may move upward to open the internal flow path 128a.

The connector holder <NUM> is fixedly disposed in the outer circumference of the connector pipe <NUM>. The connector holder <NUM> may be disposed in the lower side of the lower surface of the inner water tank body <NUM>. Therefore, the connector holder <NUM> may be connected to the connector pipe <NUM> and fix the arrangement of the connector body <NUM>.

Referring to <FIG>, the inner water tank <NUM> may include a packing <NUM> mounted in the inner water tank body <NUM> forming the circumference of the lower hole <NUM>. The packing <NUM> is made of a rubber material. The packing <NUM> may be disposed to contact the connector plate <NUM> in the upper side and contact the connector holder <NUM> in the lower side.

The packing <NUM> may prevent contact between the inner water tank body <NUM> and the connector body <NUM>. The packing <NUM> may prevent contact between the inner water tank body <NUM> and the connector holder <NUM>. The packing <NUM> may seal between the connector plate <NUM> and the lower wall <NUM> of the inner water tank body <NUM>. In addition, the packing <NUM> may seal between the connector holder <NUM> and the lower wall <NUM> of the inner water tank body <NUM>. That is, the packing <NUM> may doubly prevent water existing in the inner side of the inner water tank <NUM> from leaking through the outer side of the connector <NUM>.

An inner sealer <NUM> may be disposed in the outer circumference of the connector pipe <NUM>. The inner sealer <NUM> may seal a space between the connector <NUM> and the supply pipe <NUM>.

An outer sealer <NUM> may be disposed in the outer circumference of the connector holder <NUM>. The outer sealer <NUM> may be disposed to contact one side of the outer water tank <NUM> and/or the inner shell <NUM> which will be described below.

Referring to <FIG>, the water tank cover <NUM> may be disposed in the upper side of the inner water tank <NUM>. The water tank cover <NUM> may be disposed to be seated on the discharge grill <NUM>. The water tank cover <NUM> may include a central cover <NUM> and a peripheral cover <NUM> disposed in the outer circumference of the central cover <NUM>.

The peripheral cover <NUM> may be disposed in the upper side of the discharge grill <NUM>, and may maintain the arrangement of the water tank cover <NUM>. The peripheral cover <NUM> may have a ring-shaped structure. The peripheral cover <NUM> may have a structure that is inclined downward as it progresses inward in the radial direction. Therefore, when water is supplied to the upper portion, the water may flow toward the central cover <NUM>.

The central cover <NUM> may have a shape that is convex upward. Therefore, when water is supplied to the upper side of the central cover <NUM>, the water may flow in the direction of the outer circumference of the central cover <NUM>. A water supply hole <NUM> for supplying water in the direction of the inner water tank <NUM> may be formed between the central cover <NUM> and the peripheral cover <NUM>. The water supply hole <NUM> may flow to the upper side of the handle fixing portion <NUM> of the handle <NUM> of the inner water tank <NUM>.

The water tank cover <NUM> may be disposed to be spaced upward from the inner water tank <NUM> and/or the outer water tank <NUM>. Therefore, the force of water pressing the water tank cover <NUM> downward during the water supply process may not be delivered to the inner water tank <NUM> or the outer water tank <NUM>.

The outer water tank <NUM> is disposed in the outer circumference of the inner water tank <NUM>. The outer water tank <NUM> may be disposed in contact with the outer circumference of the inner water tank <NUM>. Therefore, condensation water generated in the outer circumference of the inner water tank <NUM> may be minimized.

The upper end <NUM> of the outer water tank <NUM> may be formed to be spaced apart from the inner water tank <NUM>. That is, the upper end <NUM> of the outer water tank <NUM> may be formed so that the rate of expansion in the radial direction increases as it progresses upward.

The outer water tank <NUM> may also have a cylindrical shape having an open upper side. A through hole <NUM> through which the connector <NUM> of the inner water tank <NUM> penetrates may be formed in the lower surface of the outer water tank <NUM>. The through hole <NUM> is formed larger than the lower hole <NUM> of the inner water tank <NUM>.

Referring to <FIG>, in the lower surface of the outer water tank <NUM>, a lower protrusion <NUM> protruding downward around the through hole <NUM>, a pair of first water tank protrusions 170a, 170b protruding downward from the lower surface of the outer water tank <NUM>, and a second water tank protrusion <NUM> protrudes downward from the lower surface of the outer water tank <NUM> may be disposed.

The lower protrusion <NUM> may be disposed around the through hole <NUM>. The lower protrusion <NUM> may extend downward from the inner circumferential end of the lower surface of the outer water tank <NUM>. The lower protrusion <NUM> may have a ring shaped structure. The outer sealer <NUM> may be disposed in contact with the inner circumferential surface of the lower protrusion <NUM>.

Referring to <FIG>, a pair of first water tank protrusions 170a, 170b may be disposed in opposite directions based on the through hole <NUM>. A pair of first water tank protrusions 170a and 170b may transmit the load of the inner water tank <NUM> and the outer water tank <NUM> to a weight sensor 212a, 212b of middle tray <NUM> which will be described below. A pair of first water tank protrusions 170a, 170b may directly transmit the load of the inner water tank <NUM> and the outer water tank <NUM> to the weight sensor 212a, 212b, or may indirectly transmit through the inner shell <NUM>.

The second water tank protrusion <NUM> may be disposed between the pair of first water tank protrusions 170a and 170b.

The inner shell <NUM> is disposed to be spaced apart from the outer water tank <NUM>. The inner shell <NUM> is disposed to be spaced apart from the water tank <NUM>. A first discharge flow path <NUM> through which humidified air flows is formed between the inner shell <NUM> and the outer water tank <NUM>.

Referring to <FIG>, the inner shell <NUM> is disposed to be spaced apart from the outer shell <NUM>. The inner shell <NUM> may have a second discharge flow path <NUM> through which the filtered air flows between the outer shell <NUM> and the inner shell <NUM>.

The inner shell <NUM> may have a cylindrical shape with an open upper side. The inner shell <NUM> may have a larger diameter than the outer water tank <NUM>. The upper end of the inner shell <NUM> may be formed at a large radial expansion rate, similar to the upper end <NUM> of the outer water tank <NUM>.

A shell through hole <NUM> is formed in the lower surface of the inner shell <NUM>. The shell through hole <NUM> is disposed below the through hole <NUM> of the outer water tank <NUM>. The connector <NUM> may be disposed in the shell through hole <NUM>.

The inner shell <NUM> may be formed of a transparent material. Referring to <FIG>, an upper protrusion <NUM> that protrudes upward from a portion where the shell through hole <NUM> is formed may be disposed in the inner shell <NUM>. The upper protrusion <NUM> of the inner shell <NUM> may be disposed in contact with the lower protrusion <NUM> of the outer water tank <NUM>.

The size of the shell through hole <NUM> of the inner shell <NUM> may be smaller than the size of the through hole <NUM> of the outer water tank <NUM>. The upper protrusion <NUM> may be disposed inside the lower protrusion <NUM> of the outer water tank <NUM>. That is, the outer circumferential surface of the upper protrusion <NUM> may be disposed to face the inner circumferential surface of the lower protrusion <NUM> of the outer water tank <NUM>.

The outer sealer <NUM> may be disposed in the upper side of the upper protrusion <NUM>.

A pair of first shell protrusions 188a and 188b in which the pair of first water tank protrusions 170a and 170b of the outer water tank <NUM> are mounted may be disposed in the inner shell <NUM>. The pair of first shell protrusions 188a and 188b may have a structure that protrudes downward from the lower surface of the inner shell <NUM>. Each of the pair of first shell protrusions 188a and 188b forms a space into which the pair of first water tank protrusions 170a and 170b are inserted.

Each of the pair of first shell protrusions 188a and 188b is disposed in the upper side of the weight sensor 212a, 212b disposed in the middle tray <NUM>. Therefore, the pair of first shell protrusions 188a and 188b may transmit the loads of the inner water tank <NUM> and the outer water tank <NUM> to the weight sensor 212a, 212b.

A second shell protrusion <NUM> on which the second water tank protrusion <NUM> of the outer water tank <NUM> is mounted may be disposed in the inner shell <NUM>. The second shell protrusion <NUM> may form a space into which the second water tank protrusion <NUM> is inserted.

Referring to <FIG>, an exhaust connection pipe <NUM> is disposed in the inner shell <NUM> to guide humidified air discharged from the second humidifying water tank <NUM> to the first discharge flow path <NUM>. The exhaust connection pipe <NUM> has a structure extending downward from the lower surface of the inner shell <NUM>. The exhaust connection pipe <NUM> may have a shape corresponding to an exhaust pipe <NUM> described below. The exhaust connection pipe <NUM> may have an approximate oval shape.

Referring to <FIG>, the lower end of the exhaust connection pipe <NUM> may be connected to the upper end of the exhaust pipe <NUM>. The lower end of the exhaust connection pipe <NUM> may be disposed inside the upper end of the exhaust pipe <NUM>. The lower end of the connection pipe <NUM> may be formed to have a step for protruding into the inside of the exhaust pipe <NUM>. An exhaust pipe connection hole <NUM> opened downward is formed at the lower end of the exhaust connection pipe <NUM>.

The humidifier includes a middle tray <NUM> that distinguishes between an area where the water tank <NUM> is disposed and an area where the humidifying module is disposed. The middle tray <NUM> may detect the level of water stored in the water tank <NUM>. The middle tray <NUM> may irradiate light to the discharged humidified air.

Referring to <FIG>, the middle tray <NUM> is disposed in the lower side of the water tank <NUM>. The middle tray <NUM> is disposed in the upper side of the second humidifying water tank <NUM> or the first humidifying water tank <NUM> which will be described below. The weight sensor 212a, 212b that detects the water level of the water tank <NUM> by weight may be disposed in the middle tray <NUM>.

Referring to <FIG>, a lamp <NUM> that irradiates light toward the first discharge flow path <NUM> may be disposed in the middle tray <NUM>. The inner shell <NUM> may be seated on the middle tray <NUM>. The middle tray <NUM> may be equipped with an inner water tank <NUM> and an outer water tank <NUM>.

Referring to <FIG>, the middle tray <NUM> includes a tray plate <NUM> and a lamp housing <NUM> that is disposed around the outer circumference of the tray plate <NUM> and has a lamp <NUM> disposed therein.

A first hole <NUM> through which the supply pipe <NUM> passes is formed in one side of the tray plate <NUM>. The first hole <NUM> may be formed at the center of the tray plate <NUM>. A portion of the supply pipe <NUM> is disposed upstream of the first hole <NUM>. The connector <NUM> of the inner water tank <NUM> may be connected to the supply pipe <NUM> disposed in the upper side of the first hole <NUM>.

Referring to <FIG>, a first flange <NUM> protruding toward the upper side of the tray plate <NUM> is disposed around the first hole <NUM>. Therefore, water flowing into the upper side of the tray plate <NUM> may be prevented from flowing to the lower side of the middle tray <NUM>.

A second hole <NUM> through which the humidified air discharged from the second humidifying water tank <NUM> flows is formed in the other side of the tray plate <NUM>. A second flange <NUM> protruding upward from the tray plate <NUM> is disposed around the second hole <NUM>. The second flange <NUM> may prevent water flowing into the upper side of the tray plate <NUM> from flowing to the lower side of the middle tray <NUM> through the second hole <NUM>.

The lamp housing <NUM> is disposed along the circumference of the tray plate <NUM>. The lamp housing <NUM> may be formed in a ring shape. The lamp <NUM> that irradiates light upward may be disposed inside the lamp housing <NUM>. One side of the lamp housing <NUM> may be formed of a material that transmits light emitted from the lamp <NUM>.

The middle tray <NUM> may be disposed to cover the upper sides of the first humidifying water tank <NUM> and the second humidifying water tank <NUM>. The middle tray <NUM> may be coupled with the humidifying module housing <NUM> described below to form a space in which the first humidifying water tank <NUM> and the second humidifying water tank <NUM> are disposed.

Hereinafter, the humidifying module housing and the middle tray will be described with reference to <FIG>.

Referring to <FIG>, the humidifier includes a humidifying module housing <NUM> that forms a space in which the first humidifying water tank <NUM> and the second humidifying water tank <NUM> are disposed, and a middle tray <NUM> disposed in the upper side of the humidifying module housing <NUM>.

Referring to <FIG>, a space in which the first humidifying water tank <NUM> and the second humidifying water tank <NUM> are disposed is formed between the humidifying module housing <NUM> and the middle tray <NUM>. The humidifying module housing <NUM> may form a space in which the first humidifying water tank <NUM> and the second humidifying water tank <NUM> are disposed and may have a shape having an open upper side. The middle tray <NUM> may be disposed to cover the opened upper side of the humidifying module housing <NUM>.

Referring to <FIG>, inside the space formed by the humidification module housing <NUM>, a first humidifying water tank <NUM> for heating water, a second humidifying water tank <NUM> that is connected to the first humidifying water tank <NUM> and generates humidified air by using heated water, and a supply pipe <NUM> that supplies water to the first humidifying water tank <NUM> may be disposed. The exhaust pipe <NUM> for sending humidified air generated in the second humidifying water tank <NUM> to the first discharge flow path <NUM> may be disposed inside a space formed by the humidifying module housing <NUM>. The exhaust pipe <NUM> may send the humidified air generated in the second humidifying water tank <NUM> and/or the humidified air generated in the first humidifying water tank <NUM> to the upper side of the middle tray <NUM>.

Referring to <FIG>, an air guide cover <NUM> is disposed in one side of the circumferential surface of the humidifying module housing <NUM>. The air guide cover <NUM> may have a structure that protrudes outward from one side of the circumferential surface of the humidifying module housing <NUM>.

A plurality of air guide ribs <NUM> that extend in the up-down direction and are spaced apart in a direction perpendicular to the up-down direction are disposed in the circumferential surface of the humidifying module housing <NUM>. The air guide rib <NUM> is disposed in the lower side of the air guide cover <NUM>.

Referring to <FIG>, a drain pipe hole <NUM> through which a drain pipe <NUM> passes is formed in the other side of the circumferential surface of the humidifying module housing <NUM>. A drain pipe groove <NUM>, which is recessed downward in an area where the drain pipe <NUM> is disposed, is formed in the lower surface of the humidifying module housing <NUM>. A drain pipe <NUM> may be mounted in the drain pipe groove <NUM>.

The air guide cover <NUM> is disposed to protrude to one side of the circumferential surface of the humidifying module housing <NUM>. The air guide rib <NUM> is disposed below the air guide cover <NUM> of the humidifying module housing <NUM>.

Referring to <FIG>, the display <NUM> is disposed in the circumferential surface of the humidifying module housing <NUM>. The display <NUM> is disposed in the opposite direction where the air guide cover <NUM> protrudes.

Referring to <FIG> and <FIG>, a drain valve <NUM> for opening and closing the drain pipe <NUM> is disposed at the distal end of the drain pipe <NUM>. The drain valve <NUM> may open and close the drain pipe <NUM> depending on its arrangement.

The humidifying module housing <NUM> may have a display <NUM> mounted on the other side of the circumferential surface.

The middle tray <NUM> is disposed in the upper sides of the first humidifying water tank <NUM> and the second humidifying water tank <NUM>. The middle tray <NUM> is disposed in the open upper side of the humidifying module housing <NUM>. The middle tray <NUM> may cover the open upper side of the humidifying module housing <NUM>.

The water tank <NUM> may be mounted in the upper side of the middle tray <NUM>. The water tank <NUM> and the inner shell <NUM> may be disposed in the upper side of the middle tray <NUM>. Referring to <FIG>, the weight sensor 212a, 212b that detects the water level of the water tank <NUM> may be disposed in the upper surface of the middle tray <NUM>.

In one side of the upper surface of the middle tray <NUM>, a second hole <NUM> may be formed to allow humidified air discharged from the second humidifying water tank <NUM> to flow. Some components of the supply pipe <NUM> may penetrate the first hole <NUM> formed in the middle tray <NUM> and protrude toward the upper side of the middle tray <NUM>.

A mounting protrusion <NUM> protruding upward may be disposed in the upper surface of the middle tray <NUM> to maintain the disposition of the second shell protrusion <NUM> of the inner shell <NUM>. The mounting protrusion <NUM> is disposed around a fixing groove <NUM> where the second shell protrusion <NUM> is disposed.

Between the middle tray <NUM> and the humidifying module housing <NUM>, a peripheral wall <NUM> of a second upper cover <NUM> described below may be disposed to be exposed.

Referring to <FIG>, the middle tray <NUM> is disposed in the upper side of the humidifying module housing <NUM>. The middle tray <NUM> may be disposed to cover the upper side of the humidifying module housing <NUM>. Therefore, the middle tray <NUM> may distinguish between an area where humidified air is generated and an area where the humidified air flows to be discharged.

The configuration of the supply pipe, the first humidifying water tank, the second humidifying water tank, and the exhaust pipe will be described with reference to <FIG>.

The humidifier of the present invention may include a humidifying module that heats water and generates humidified air. The humidifying module may include a first humidifying water tank <NUM> that heats water and a second humidifying water tank <NUM> that generates humidified air by using a vibrator <NUM>.

The humidifier may include a first connection pipe <NUM> and a second connection pipe <NUM> that connect the first humidifying water tank <NUM> and the second humidifying water tank <NUM>. The first connection pipe <NUM> may supply water heated in the first humidifying water tank <NUM> to the second humidifying water tank <NUM>.

Referring to <FIG>, a second valve <NUM> is disposed in the first connection pipe <NUM>. The second valve <NUM> may open and close the internal flow path of the first connection pipe <NUM>, so that water heated in the first humidifying water tank <NUM> may be supplied to the second humidifying water tank <NUM>.

The first humidifying water tank <NUM> and the second humidifying water tank <NUM> may be connected through a communication pipe <NUM> disposed above the first connection pipe <NUM>.

Water heated in the first humidifying water tank <NUM> may be supplied to the second humidifying water tank <NUM> through the first connection pipe <NUM>. The humidified air generated in the first humidifying water tank <NUM> may flow into the second humidifying water tank <NUM> through the communication pipe <NUM>.

Referring to <FIG>, a pump <NUM> is disposed in the second connection pipe <NUM>. When the pump <NUM> operates, water in the second humidifying water tank <NUM> flows to the first humidifying water tank <NUM>.

The humidifier includes a first temperature sensor <NUM> that detects the temperature of the water stored inside the first humidifying water tank <NUM>, and a first water level sensor <NUM> that detects the level of water stored inside the first humidifying water tank <NUM>. Referring to <FIG>, the first temperature sensor <NUM> and the first water level sensor <NUM> are disposed in one side of the first humidifying water tank <NUM>.

The humidifier includes a second temperature sensor <NUM> that detects the temperature of the water stored inside the second humidifying water tank <NUM>, and a second water level sensor <NUM> that detects the level of water stored in the second humidifying water tank <NUM>. Referring to <FIG>, the second temperature sensor <NUM> and the second water level sensor <NUM> are disposed in one side of the second humidifying water tank <NUM>.

The humidifier includes a detection sensor <NUM> that detects the quality of water existing in the supply pipe <NUM>. Referring to <FIG>, the detection sensor <NUM> is disposed in one side of the supply pipe <NUM>. The detection sensor <NUM> may detect the quality of the water flowing from the water tank <NUM>. The detection sensor <NUM> may detect the replacement timing of the water softener <NUM> disposed in the water tank <NUM> by detecting the water quality.

The humidifier of the present invention includes a supply pipe <NUM> that supplies water stored in the water tank <NUM> to the first humidifying water tank <NUM>. The supply pipe <NUM> is disposed between the water tank <NUM> and the first humidifying water tank <NUM>. The supply pipe <NUM> may temporarily store water that is discharged from the water tank <NUM> and supplied to the first humidifying water tank <NUM>.

A supply chamber <NUM> in which water is temporarily stored may be formed in the supply pipe <NUM>. A detection sensor <NUM> for detecting the hardness of the water stored inside may be disposed in one side of the supply pipe <NUM>.

A plurality of components may be coupled to form the supply pipe <NUM>. Referring to <FIG>, the supply pipe <NUM> may be formed by coupling a first upper cover <NUM> and a supply pipe cover <NUM>. The supply pipe cover <NUM> may have a structure that is disposed in the upper side of the first upper cover <NUM> and forms a supply chamber <NUM> therein by coupling with the first upper cover <NUM>. Unlike the drawing, it is also possible that the supply pipe is formed as a single structure.

The supply pipe <NUM> includes an upper supply pipe 230a connected to the connector <NUM>, a middle supply pipe 230b extending to the lower side of the upper supply pipe 230a, and a lower supply pipe 230c extending from the lower portion of the middle supply pipe 230b in a direction perpendicular to the up-down direction.

The upper supply pipe 230a may be disposed above the middle tray <NUM>. The upper supply pipe 230a may have a structure that penetrates the first hole <NUM> of the middle tray <NUM> and extends upwardly. The middle supply pipe 230b extends to the lower side of the upper supply pipe 230a and may have a cylindrical shape. The diameter of the middle supply pipe 230b may be larger than the diameter of the upper supply pipe 230a.

The lower supply pipe 230c may extend in a direction perpendicular to the up-down direction from one side of the middle supply pipe 230b. The lower supply pipe 230c may form the supply chamber <NUM> together with the first upper cover <NUM> disposed in the upper side of the first humidifying water tank <NUM> disposed below.

The lower supply pipe 230c may be formed between the supply pipe cover <NUM> and the first upper cover <NUM>. The first upper cover <NUM> has a chamber groove <NUM> recessed downward in the area forming the lower supply pipe 230c.

A first valve <NUM> is disposed at the distal end of the lower supply pipe 230c. The flow path formed by the supply pipe cover <NUM> and the first upper cover <NUM> may have a narrow flow path shape, and has a distal end in which the first valve <NUM> is disposed.

Depending on the disposition of the first valve <NUM>, the flow path formed at the distal end of the supply pipe <NUM> may be opened or closed. The first valve <NUM> may supply water from the supply pipe <NUM> to the first humidifying water tank wall <NUM> or stop supplying water.

The first valve <NUM> may be disposed in the upper side of the first humidifying water tank <NUM> to supply water existing in the supply pipe <NUM> to the first humidifying water tank <NUM> or to stop supplying water.

A first supply hole <NUM> may be formed in the first upper cover <NUM>. Water existing in the supply chamber <NUM> may flow toward the first humidifying water tank <NUM> through the first supply hole <NUM>. The first valve <NUM> may supply water stored in the supply chamber <NUM> to the first humidifying water tank <NUM> by opening and closing the first supply hole <NUM>.

The detection sensor <NUM> is disposed in the supply pipe <NUM> to detect the quality of water existing inside the supply chamber <NUM>. The detection sensor <NUM> is disposed in one side of the middle supply pipe 230b. The detection sensor <NUM> may be disposed in the upper portion of the middle supply pipe 230b.

Referring to <FIG>, the detection sensor <NUM> is disposed in the upper side of the middle supply pipe 230b, and may quickly detect the quality of water supplied from the water tank <NUM>. That is, when the water existing in the supply chamber <NUM> falls and the water in the water tank <NUM> flows in, the detection sensor <NUM> may detect the quality of the water flowing in from the water tank <NUM>.

The first humidifying water tank <NUM> has a first chamber 300a forming a space in which water is stored and the water is heated.

Referring to <FIG> and <FIG>, the first humidifying water tank <NUM> may include a first humidifying water tank wall <NUM> forming the first chamber 300a, and a heater <NUM> that is disposed in the lower side of the first humidifying water tank wall <NUM> and heats the water inside the first humidifying water tank wall <NUM>.

The first humidifying water tank wall <NUM> may have a cylindrical shape in which water is stored. The first humidifying water tank wall <NUM> may have an open lower side, and a heater <NUM> may be disposed in the lower side of the first humidifying water tank wall <NUM>.

Referring to <FIG> and <FIG>, the first humidifying water tank wall <NUM> may include a lower water tank wall <NUM>, a middle water tank wall <NUM>, and an upper water tank wall <NUM>. The lower water tank wall <NUM>, the middle water tank wall <NUM>, and the upper water tank wall <NUM> may be disposed side by side from the lower side to the upper side.

The heater <NUM> may be disposed on the lower water tank wall <NUM>. The heater <NUM> may be disposed to protrude inside the lower water tank wall <NUM>. However, the heater <NUM> may be disposed to be spaced radially inward from the inner circumferential surface of the lower water tank wall <NUM>. The lower water tank wall <NUM> may be disposed to be spaced apart from the heater <NUM> disposed inside at a certain distance. A drain hole <NUM> is formed in one side of the lower water tank wall <NUM>.

Referring to <FIG> and <FIG>, the heater <NUM> may include a heating element <NUM> that receives electricity to generate heat, and a heating plate <NUM> disposed in contact with the heating element <NUM>. The heating element <NUM> may be formed in a ring shape having one side open. The heating element <NUM> may be disposed inside the lower water tank wall <NUM>.

The heating plate <NUM> is disposed in the upper side of the heating element <NUM> and transmits the heat generated by the heating element <NUM> to the water inside the first humidifying water tank <NUM>. The heating plate <NUM> may be disposed to cover the heating element <NUM>. Some components of the heating plate <NUM> may be disposed to protrude inside the lower water tank wall <NUM> to cover the heating element <NUM>. The heating plate <NUM> disposed inside the lower water tank wall <NUM> may be disposed to be spaced apart from the inner circumferential surface of the lower water tank wall <NUM>.

Referring to <FIG>, the middle water tank wall <NUM> is disposed in the upper side of the lower water tank wall <NUM>. The diameter 306D of the middle water tank wall <NUM> is larger than the diameter 308D of the lower water tank wall <NUM>. The diameter 306D of the middle water tank wall <NUM> may be smaller than the diameter 304D of the upper water tank wall <NUM>.

The middle water tank wall <NUM> is formed to have a small diameter, thereby forming a space where the second valve <NUM> is disposed inside the humidifying module housing <NUM>. The middle water tank wall <NUM> is formed to have a small diameter, thereby forming a space where the connection pipe <NUM> is disposed inside the humidifying module housing <NUM>.

Referring to <FIG> and <FIG>, the first temperature sensor <NUM> is disposed in one side of the middle water tank wall <NUM>. In one side of the middle water tank wall <NUM>, a recovery inlet hole <NUM> through which water flows in from the second connection pipe <NUM> is formed. An outlet hole <NUM> through which water flows out to the first connection pipe <NUM> may be formed in one side of the middle water tank wall <NUM>.

The outlet hole <NUM> may be disposed at a higher position than the recovery inlet hole <NUM>. The first temperature sensor <NUM> may be disposed at a higher position than the recovery inlet hole <NUM>. The outlet hole <NUM> may be disposed at the same as or higher position than the first temperature sensor <NUM>.

Therefore, the first temperature sensor <NUM> may detect the temperature that is varied as the water supplied to the first humidifying water tank <NUM> is heated. In addition, the first temperature sensor <NUM> may detect the temperature of water stored in the first chamber 300a of the first humidifying water tank <NUM> after a portion of the water stored inside the first humidifying water tank <NUM> is supplied to the second humidifying water tank <NUM>.

The first temperature sensor <NUM> may detect the temperature change inside the first humidifying water tank <NUM>. The first temperature sensor <NUM> may detect abnormal operation of the heater <NUM> inside the first humidifying water tank <NUM>.

The upper water tank wall <NUM> may extend to the upper side of the middle water tank wall <NUM>. The diameter 304D of the upper water tank wall <NUM> may be larger than the diameter of the middle water tank wall <NUM>. The length of the upper water tank wall <NUM> extending in the up-down direction may be longer than the length of the middle water tank wall <NUM> extending in the up-down direction. The size of the internal space formed by the upper water tank wall <NUM> may be larger than the size of the internal space formed by the middle water tank wall <NUM> and the lower water tank wall <NUM>.

Referring to <FIG> and <FIG>, a first water level sensor <NUM> is disposed in one side of the upper water tank wall <NUM>. The first water level sensor <NUM> is disposed above the first temperature sensor <NUM>. The first water level sensor <NUM> may detect the water level inside the first humidifying water tank <NUM>. The first water level sensor <NUM> may detect a normal water level of the heating water tank.

Here, the normal water level of the first humidifying water tank <NUM> may mean an area between an upper end where the water supplied to the first humidifying water tank <NUM> does not exceed a set water level, and a lower end which is a minimum level where water must exist to operate the heater <NUM>.

The first humidifying water tank <NUM> may include an upper cover <NUM>, <NUM> disposed in the upper side of the first humidifying water tank wall <NUM>. The upper cover <NUM>, <NUM> is disposed in the upper side of the upper water tank wall <NUM>.

The upper cover <NUM>, <NUM> may be disposed to cover at least a portion of the upper side of the first humidifying water tank wall <NUM>. The upper cover <NUM>, <NUM> may include the first upper cover <NUM> and the second upper cover <NUM> disposed in the lower side of the first upper cover <NUM>.

Referring to <FIG> and <FIG>, the first upper cover <NUM> is disposed in the upper side of the second upper cover <NUM>. The first upper cover <NUM> may partition the first humidifying water tank wall <NUM> and the supply pipe <NUM>. The first upper cover <NUM> may form one side of the supply chamber <NUM> that forms the inside of the supply pipe <NUM>.

Referring to <FIG> and <FIG>, the first upper cover <NUM> has a first supply hole <NUM> through which the water stored in the supply chamber <NUM> flows. The first valve <NUM> may be disposed in the upper side of the first supply hole <NUM>, and may open and close the first supply hole <NUM>. The first upper cover <NUM> may be disposed to be spaced upward from the upper end of the upper water tank wall <NUM>.

The first upper cover <NUM> may have a structure connected to the exhaust pipe <NUM> described below. The first upper cover <NUM> may be formed as one body with the exhaust pipe <NUM>. The first upper cover <NUM> may have a smaller area than the second upper cover <NUM>.

The first upper cover <NUM> may be disposed to be spaced apart from the second upper cover <NUM>. That is, the first upper cover <NUM> may be disposed upward to be spaced apart from the second upper cover <NUM>.

A portion of the first upper cover <NUM> may form a portion of the supply pipe <NUM>. The first upper cover <NUM> may form a chamber groove <NUM> that is recessed downward in the area forming the supply pipe <NUM>.

Referring to <FIG> and <FIG>, the second upper cover <NUM> may be disposed to cover the first supply hole <NUM> formed in the first upper cover <NUM>. A second supply hole <NUM> may be formed in the second upper cover <NUM> to send water flowing through the first supply hole <NUM> to the first humidifying water tank <NUM>. The second supply hole <NUM> is disposed to be spaced apart from the first supply hole <NUM> in a direction perpendicular to the up-down direction.

Referring to <FIG> and <FIG>, a supply flow path <NUM> may be formed between the second upper cover <NUM> and the first upper cover <NUM>, so that water flowing into the first supply hole <NUM> flows to the second supply hole <NUM>. A supply flow path rib <NUM> protruding upward may be disposed in the second upper cover <NUM> to form a supply flow path <NUM>. The supply flow path rib <NUM> may protrude toward the upper side of the second upper cover <NUM> and may be disposed in contact with the lower surface of the first upper cover <NUM>.

The direction in which the supply flow path <NUM> extends may have a structure that extends in a direction different from the direction in which the chamber groove <NUM> extends. In one embodiment, the direction in which the supply flow path <NUM> extends may be formed perpendicular to the direction in which the chamber groove <NUM> extends.

Referring to <FIG>, the second supply hole <NUM> may be formed in the area where the peripheral wall of the first humidifying water tank <NUM> is located. Therefore, when the water flowing in the supply flow path <NUM> flows into the first humidifying water tank <NUM> through the second supply hole <NUM>, it may flow downward along the circumferential wall of the first humidifying water tank <NUM>. This can improve the noise of falling water supplied to the first humidifying water tank <NUM>.

Referring to <FIG> and <FIG>, a first communication hole 311a is formed in the second upper cover <NUM>. The first communication hole 311a may connect the first humidifying water tank <NUM> and the second humidifying water tank <NUM>. That is, humidified air generated in the first humidifying water tank <NUM> may flow to the second humidifying water tank <NUM> through the first communication hole 311a.

The first communication hole 311a may have a structure that is opened in the up-down direction. Therefore, the humidified air generated by the heater <NUM> inside the first humidifying water tank <NUM> flows upward through the first communication hole 311a.

The second upper cover <NUM> may include an upper rib <NUM> extending upward around the first communication hole 311a. The upper rib <NUM> may have a structure that protrudes upward around the second upper cover <NUM> where the first communication hole 311a is formed.

An upper cover <NUM> may be disposed in the upper side of the second upper cover <NUM>. The upper cover <NUM> may have a structure connected to the upper rib <NUM>. The upper cover <NUM>, together with the upper rib <NUM>, may form a communication flow path <NUM> therein.

The communication flow path <NUM> may connect the first communication hole 311a formed in the first humidifying water tank <NUM> and the second communication hole 311b formed in the second humidifying water tank <NUM>. The communication flow path <NUM> may be disposed in the upper side of the first humidifying water tank <NUM>. Therefore, the humidified air that is generated in the first humidifying water tank <NUM> to rise may flow to the communication flow path <NUM> through the first communication hole 311a.

The communication flow path <NUM> may be formed by the upper rib <NUM> of the second upper cover <NUM> and the upper cover <NUM>. The communication flow path <NUM> extends in a direction horizontal to the second communication hole 311b.

A second chamber 350a is formed inside the second humidifying water tank <NUM> to store water and atomize the water.

Referring to <FIG> and <FIG>, the second humidifying water tank <NUM> includes a second humidifying water tank wall <NUM> forming the second chamber 350a, and the vibrator <NUM> that is disposed in the lower side of the second humidifying water tank wall <NUM> and vibrates to atomize the water inside the second humidifying water tank wall <NUM>.

The second humidifying water tank wall <NUM> may have a pillar shape forming a space therein. The vibrator <NUM> is disposed in the lower side of the second humidifying water tank wall <NUM>. The second humidifying water tank wall <NUM> may have a shape in which the cross-sectional area formed in the horizontal direction increases as it progresses toward the upper side.

The upper end of the second humidifying water tank wall <NUM> may be formed to be higher than the upper end of the first humidifying water tank wall <NUM>.

The vibrator <NUM> is disposed in the lower surface of the second humidifying water tank wall <NUM>. Referring to <FIG>, an inlet hole <NUM> through which water of the first humidifying water tank wall <NUM> flows in may be formed in one side of the second humidifying water tank wall <NUM>. In one side of the second humidifying water tank wall <NUM>, a recovery discharge hole <NUM> through which water stored inside the second humidifying water tank <NUM> flows into the first humidifying water tank <NUM> may be formed.

The inlet hole <NUM> may be formed in a lower position than the outlet hole <NUM> formed in the first humidifying water tank wall <NUM>. The recovery discharge hole <NUM> may be formed in a lower position than the inlet hole <NUM>.

Referring to <FIG>, the vibrator <NUM> may be disposed in the lower surface of the second humidifying water tank <NUM>. In one side of the second humidifying water tank wall <NUM>, a recovery groove <NUM> forming a space in the circumferential direction is formed in an area where the recovery discharge hole <NUM> is formed. The recovery groove <NUM> may be formed in one side of the vibrator <NUM>. That is, the recovery groove <NUM> is formed in one side of the vibrator <NUM> disposed in the lower surface of the second humidifying water tank <NUM>. That is, the recovery groove <NUM> may form a space at the lower end of the inner side of the second humidifying water tank wall <NUM>.

The recovery discharge hole <NUM> is formed at a lower position than the recovery inlet hole <NUM> formed in the first humidifying water tank wall <NUM>.

Referring to <FIG>, a second temperature sensor <NUM> is disposed in one side of the circumferential surface of the second humidifying water tank <NUM>. The second temperature sensor <NUM> is disposed at a higher position than the recovery discharge hole <NUM>. The second temperature sensor <NUM> may be disposed at a position lower than or equal to the inlet hole <NUM>.

The second temperature sensor <NUM> may detect the temperature of the water supplied into the second humidifying water tank <NUM>. Therefore, the second temperature sensor <NUM> may detect whether water of a set temperature or higher is supplied into the second humidifying water tank <NUM>.

Referring to <FIG> and <FIG>, the second water level sensor <NUM> is disposed in one side of the peripheral wall of the second humidifying water tank <NUM>. The second water level sensor <NUM> detects the level of water existing inside the second humidifying water tank <NUM>. The second water level sensor <NUM> may detect a lowest water level inside the second humidifying water tank <NUM> at which the vibrator <NUM> can operate. In addition, the second water level sensor <NUM> may detect the amount of water stored inside the second humidifying water tank <NUM>. The second water level sensor <NUM> may detect an optimal water level for the operation of vibrator <NUM>.

Referring to <FIG>, a water level sensor cover <NUM> may be disposed inside the second humidifying water tank <NUM>. The water level sensor cover <NUM> may be disposed at a certain distance from the second water level sensor <NUM>. The water level sensor cover <NUM> may be disposed between the second water level sensor <NUM> and the vibrator <NUM>. The water level sensor cover <NUM> may have a structure that protrudes upward from the lower surface of the second humidifying water tank <NUM>.

Even if the water level inside the second humidifying water tank <NUM> is varied due to the vibrator <NUM>, the second water level sensor <NUM> can detect the water level more accurately by using the water level sensor cover <NUM>.

A second communication hole 311b is formed at the upper end of the peripheral wall of the second humidifying water tank <NUM>. The second communication hole 311b is formed at the upper end of the peripheral wall of the second humidifying water tank <NUM>. The communication hole 311b is open in the direction in which the first humidifying water tank <NUM> is disposed.

Referring to <FIG> and <FIG>, the second communication hole 311b is connected to the communication flow path <NUM>. The second communication hole 311b is opened in the horizontal direction.

Two vibrators <NUM> may be disposed in the lower surface of the second humidifying water tank <NUM>. Two vibrators <NUM> may be disposed to be spaced apart from each other in a direction perpendicular to the up-down direction.

The vibrator <NUM> includes a vibrating element <NUM> that generates vibration, and a vibrating element cover <NUM> disposed in the upper side of the vibrating element <NUM>. The vibrating element cover <NUM> is disposed to contact the water stored inside the second humidifying water tank <NUM>. The vibrating element cover <NUM> transmits the vibration generated in the vibrating element <NUM> to the water stored inside the second humidifying water tank <NUM>.

The vibrator <NUM> generates humidified air by using water stored in the second humidifying water tank <NUM>.

Referring to <FIG> and <FIG>, the second humidifying water tank <NUM> includes a humidifying water tank cover <NUM> disposed in the upper side of the second humidifying water tank wall <NUM>. The humidifying water tank cover <NUM> may supply humidified air generated in the second humidifying water tank <NUM> to the first discharge flow path <NUM>.

The humidifying water tank cover <NUM> includes an exhaust pipe <NUM> that sends humidified air upward. The exhaust pipe <NUM> may have a structure extending upward from the humidifying water tank cover <NUM>. The exhaust pipe <NUM> has a roughly oval pillar shape.

Referring to <FIG> and <FIG>, the exhaust pipe <NUM> is disposed in the upper side of a pair of vibrators <NUM>. Therefore, humidified air generated in the vibrator <NUM> may quickly flow to the exhaust pipe <NUM>. In addition, when the water stored in the second chamber 350a of the second humidifying water tank <NUM> is splashed upward by the vibrator <NUM>, it may move into the exhaust pipe <NUM>.

The upper end of the exhaust pipe <NUM> may be disposed in contact with the middle tray <NUM> (see <FIG>). Here, the upper end of the exhaust pipe <NUM> may be in direct contact with the middle tray <NUM>, or may be disposed in indirect contact through a separate sealing member <NUM>.

An exhaust pipe inlet 382a (or exhaust hole) is formed at the lower end of the exhaust pipe <NUM>. An exhaust pipe outlet 382b is formed at the upper end of the exhaust pipe <NUM>. The exhaust pipe <NUM> may have an exhaust pipe flow path <NUM> formed between the exhaust pipe inlet 382a and the exhaust pipe outlet 382b.

An air supply hole <NUM> is formed in one side of the humidifying water tank cover <NUM>. External air may flow into the second humidifying water tank <NUM> through the air supply hole <NUM>. The air supply hole <NUM> may have a shape that is opened upward.

The humidifying water tank cover <NUM> includes an air guide cover <NUM> that supplies air flowing through the blowing flow path <NUM> to the second humidifying water tank <NUM>. The air guide cover <NUM> allows a portion of the air flowing to the outside of the humidifying module housing <NUM> to flow to the inside of the second humidifying water tank <NUM> through the air supply hole <NUM>.

The air guide cover <NUM> may guide air flowing to the outside of the second humidifying water tank <NUM> to flow to the inside of the second humidifying water tank <NUM>.

The air guide cover <NUM> may have a structure that is disposed to be spaced upward from the air supply hole <NUM>, and extends in a horizontal direction from the exhaust pipe <NUM>. The air guide cover <NUM> extends from the peripheral wall of the exhaust pipe <NUM>, and may be disposed at a position spaced upward from the upper end of the second humidifying water tank wall <NUM>.

Referring to <FIG>, the air guide cover <NUM> may have a structure extending to the outside of the circumferential surface of the humidifying module housing <NUM>. Therefore, the air guide cover <NUM> may guide a portion of the air flowing upward along the blowing flow path <NUM> to flow into the second humidifying water tank <NUM>.

Referring to <FIG> and <FIG>, the air guide cover <NUM> may include a horizontal wall 386a extending in the horizontal direction from the exhaust pipe <NUM>, and a vertical wall 386b extending downward from the distal end of the horizontal wall 386a. The horizontal wall 386a may be disposed to be spaced apart upward from the air supply hole <NUM> and the upper end of the second humidifying water tank wall <NUM>.

The vertical wall 386b is disposed to be spaced outward from the peripheral wall of the second humidifying water tank <NUM>. The vertical wall 386b is disposed to be spaced outward from the peripheral wall of the humidifying module housing <NUM>. The lower end of the vertical wall 386b may be located lower than the upper end of the second humidifying water tank wall <NUM>.

Part of the air flowing through the blowing flow path <NUM> may flow upward into the space between the humidifying module housing <NUM> and the vertical wall 386b, flow to the upper side of the second humidifying water tank <NUM> along the horizontal wall 386a, and then flow to the lower portion of the second chamber 350a of the second humidifying water tank <NUM> along the air supply hole <NUM>.

An air inlet flow path <NUM> through which air flows may be formed in the lower side of the air guide cover <NUM>. The air inlet flow path <NUM> is disposed above the communication flow path <NUM>. The air supply hole <NUM> may be disposed above the communication flow path <NUM>.

The humidifying water tank cover <NUM> includes a lower extension wall <NUM> that protrudes from the humidifying water tank cover <NUM> toward the inside of the second humidifying water tank <NUM>. The lower extension wall <NUM> extends downward from the humidifying water tank cover <NUM>. The lower extension wall <NUM> has a structure that protrudes downward from the area where the exhaust pipe <NUM> is formed.

Referring to <FIG> and <FIG>, the lower extension wall <NUM> is disposed between the exhaust pipe inlet 382a and the air supply hole <NUM>. When viewed from above, the lower extension wall <NUM> may have a bent shape in a direction of the exhaust pipe inlet 382a. Accordingly, the air flowing into the second humidifying water tank <NUM> through the air supply hole <NUM> may flow along the lower portion of the second chamber 350a and the inner circumferential surface of the second humidifying water tank wall <NUM>.

The lower extension wall <NUM> may extend downward between the exhaust pipe inlet 382a and the air supply hole <NUM>. The lower extension wall <NUM> may allow air flowed into the second humidifying water tank <NUM> through the air supply hole <NUM> to flow to the lower portion of the second chamber 350a.

The lower extension wall <NUM> is not disposed in the direction in which the second communication hole 311b is formed. That is, the lower extension wall <NUM> is not disposed in the direction in which the second communication hole 311b is opened. Therefore, Humidified air flowed into the second humidifying water tank <NUM> through the second communication hole 311b may flow to the exhaust pipe inlet 382a of the exhaust pipe <NUM>.

The lower extension wall <NUM> includes a first lower extension wall 384a extending downward from the exhaust pipe <NUM> at a portion where the air supply hole <NUM> is formed, a second lower extension wall 384b disposed in one side of the first lower extension wall 384a, and a third lower extension wall 384c disposed in the other side of the first lower extension wall 384a.

The second lower extension wall 384b and the third lower extension wall 384c may be disposed in opposite directions. The second lower extension wall 384b and the third lower extension wall 384c may be disposed to face each other.

Referring to <FIG> and <FIG>, the length 384bL, 384cL of each of the second lower extension wall 384b and the third lower extension wall 384c protruding downward from the humidifying water tank cover <NUM> may be formed shorter than the length 384aL of the first lower extension wall 384a extending downward from the humidifying water tank cover <NUM>.

The lower end of the first lower extension wall 384a is formed lower than the upper end of the water level sensor cover <NUM>. The lower end of each of the second lower extension wall 384b and the third lower extension wall 384c is formed higher than the upper end of the water level sensor cover <NUM>. The water level sensor cover <NUM> may be disposed in the lower side of the second lower extension wall 384b or the third lower extension wall 384c.

The lower end of the first lower extension wall 384a may be located lower than the lower end of the second lower extension wall 384b or the lower end of the third lower extension wall 384c. In the area facing the second communication hole 311b, a hole through which humidified air flowing from the second communication hole 311b flows into the exhaust pipe <NUM> may be formed between the second lower extension wall 384b and the third lower extension wall 384c.

The humidifying water tank cover <NUM> may be formed as one body with the first upper cover <NUM>.

The first connection pipe <NUM> supplies water from the first humidifying water tank <NUM> to the second humidifying water tank <NUM>. The first connection pipe <NUM> may have one side connected to the first humidifying water tank <NUM>, and the other side connected to the second humidifying water tank <NUM>. The first connection pipe <NUM> may connect the outlet hole <NUM> of the first humidifying water tank <NUM> and the inlet hole <NUM> of the second humidifying water tank <NUM>. The first connection pipe <NUM> may be disposed to be lowered downward from the outlet hole <NUM> to the inlet hole <NUM>.

The first connection pipe <NUM> may extend along the circumferential circumference of the first humidifying water tank wall <NUM>. The inlet hole <NUM> and the outlet hole <NUM> may be disposed in different directions. Therefore, the first connection pipe <NUM> may have a structure extending along the circumference of the first humidifying water tank wall <NUM>.

The first connection pipe <NUM> may be formed to be longer than the second connection pipe <NUM>. The second valve <NUM> may be disposed in the first connection pipe <NUM>. The second valve <NUM> may be disposed closer to the first humidifying water tank <NUM> than the second humidifying water tank <NUM>. The second valve <NUM> may be disposed closer to the outlet hole <NUM> than the inlet hole <NUM>.

The second connection pipe <NUM> supplies water from the second humidifying water tank <NUM> to the first humidifying water tank <NUM>. The pump <NUM> is disposed in the second connection pipe <NUM>. The second connection pipe <NUM> connects the recovery discharge hole <NUM> of the second humidifying water tank wall <NUM> and the recovery inlet hole <NUM> of the first humidifying water tank wall <NUM>.

The recovery discharge hole <NUM> may be located lower than the recovery inlet hole <NUM>. The pump <NUM> may be located above the recovery discharge hole <NUM> and the recovery inlet hole <NUM>.

The second connection pipe <NUM> may include a pump inlet pipe 392a connecting the second humidifying water tank <NUM> and the pump <NUM>, and a pump outlet pipe 392b connecting the pump <NUM> and the first humidifying water tank <NUM>. The pump <NUM> may be disposed in one side of the second humidifying water tank <NUM>.

The humidifier includes a drain pipe <NUM> that drains the water existing in the first humidifying water tank <NUM>, and a drain valve <NUM> that is disposed at the distal end of the drain pipe <NUM> and opens and closes the drain pipe <NUM>. Referring to <FIG>, the drain pipe <NUM> may be connected to one side of the first humidifying water tank <NUM>. The drain pipe valve <NUM> may be disposed at the distal end of the drain pipe <NUM>.

The drain pipe <NUM> may discharge water stored in the first humidifying water tank <NUM> to the outside. Referring to <FIG>, the drain pipe <NUM> may extend to the outside of the humidifying module housing <NUM>.

Operation of first humidifying water tank and second humidifying water tank>.

First, various sensors and valves disposed in each of the first humidifying water tank <NUM> and the second humidifying water tank <NUM>, and the operation of the first humidifying water tank <NUM> and the second humidifying water tank <NUM> are explained with reference to <FIG>.

The first humidifying water tank <NUM> heats the water supplied from the water tank <NUM>. Water of the water tank <NUM> may be supplied to the upper side of the first humidifying water tank <NUM>. The first valve <NUM> may open the supply pipe <NUM> so that water can be supplied to the first humidifying water tank <NUM>.

The first valve <NUM> may operate based on the water level detected by the first water level sensor <NUM>. The first valve <NUM> may open the supply pipe <NUM>, when the water level detected by the first water level sensor <NUM> is lower than a set water level.

The first valve <NUM> closes the supply pipe <NUM> when the water level detected by the first water level sensor <NUM> is a set water level or higher. When the second valve <NUM> opens the first connection pipe <NUM>, the first valve <NUM> may close the supply pipe <NUM>. Therefore, the water flowing through the first connection pipe <NUM> may be water that has been completely heated in the first humidifying water tank <NUM>.

The first valve <NUM> opens the supply pipe <NUM>, when the water quality detected by the detection sensor <NUM> is a set level or higher. The detection sensor <NUM> may measure water quality by measuring the electrical conductivity of water. That is, the concentration of ions can be detected by measuring the electrical conductivity of water. Therefore, water, which has improved water quality, that passed through the water softener <NUM> may be supplied to the first humidifying water tank <NUM>.

When water is supplied to the first humidifying water tank <NUM> at a certain level and the first valve <NUM> closes the supply pipe <NUM>, the heater <NUM> may operate. The heater <NUM> heats the water stored in the first humidifying water tank <NUM>. The humidified air generated by the operation of the heater <NUM> may flow to the second humidifying water tank <NUM> through the communication pipe <NUM>.

When the heater <NUM> operates, the fan <NUM> may operate. That is, when the heater <NUM> heats the water stored in the first humidifying water tank <NUM>, the fan <NUM> operates to supply air to the second humidifying water tank <NUM>. The fan <NUM> may supply air to the second humidifying water tank <NUM> to cool the inside of the second humidifying water tank <NUM>.

The heater <NUM> may operate until the temperature of the water detected by the first temperature sensor <NUM> reaches <NUM> degrees. The water stored in the first humidifying water tank <NUM> is heated to a boiling point and sterilized. When the temperature of the water detected by the first temperature sensor <NUM> reaches <NUM> degrees, the second valve <NUM> opens the first connection pipe <NUM>. After the temperature of the water detected by the first temperature sensor <NUM> reaches <NUM> degrees, the second valve <NUM> may open the first connection pipe <NUM>.

The first temperature sensor <NUM> may be disposed at a position equal to or lower than the outlet hole <NUM>. Therefore, the temperature of the water remaining after the water in the second humidifying water tank <NUM> is discharged through the first connection pipe <NUM> may be detected.

When the second valve <NUM> is opened, the water stored in the first humidifying water tank <NUM> flows to the second humidifying water tank <NUM> by gravity. When the second valve <NUM> is opened, water may move until the water levels in the first humidifying water tank <NUM> and the second humidifying water tank <NUM> become the same. When the second valve <NUM> is opened, the water level in the first humidifying water tank <NUM> may be lowered to a height of the outlet hole <NUM> formed in the first humidifying water tank <NUM>.

When the second water level sensor <NUM> is lower than an optimal height at which the vibrator <NUM> of the second humidifying water tank <NUM> can operate, the second valve <NUM> opens the first connection pipe <NUM>. When a water level difference between the first humidifying water tank <NUM> and the second humidifying water tank <NUM> detected by the first water level sensor <NUM> and the second water level sensor <NUM> is formed, the second valve <NUM> opens the first connection pipe <NUM>.

The second valve <NUM> may be opened for a set time. That is, the second valve <NUM> may be opened for a set time considering the time when the water levels of the first humidifying water tank <NUM> and the second humidifying water tank <NUM> become the same, and when the set time elapses, the first connection pipe <NUM> may be closed. Considering the time during which water in the first humidifying water tank <NUM> flows to the second humidifying water tank <NUM>, the second valve <NUM> may be opened for a set time.

The fan <NUM> may operate while the second valve <NUM> is opened. By operating the fan <NUM>, the air flowing into the second humidifying water tank <NUM> may cool the water flowing into the second humidifying water tank <NUM> through the first connection pipe <NUM>.

The second temperature sensor <NUM> detects the temperature of the water stored in the second humidifying water tank <NUM>. The second temperature sensor <NUM> may detect the temperature of water flowing into the second humidifying water tank <NUM> through the inlet hole <NUM>. The vibrator <NUM> may operate when the temperature of the water detected by the second temperature sensor <NUM> is a set temperature or lower. The set temperature at which the vibrator <NUM> operates may be set in consideration of preventing damage to the vibrator <NUM>. The second temperature sensor <NUM> may be disposed at the same height as the inlet hole <NUM> or at a lower height than the inlet hole <NUM>. Therefore, the temperature of water flowing in through the inlet hole <NUM> can be detected.

The second water level sensor <NUM> may detect the water level of the second humidifying water tank <NUM>. The second water level sensor <NUM> may detect the lowest water level of the second humidifying water tank <NUM> at which the vibrator <NUM> does not operate. If the water level of the second humidifying water tank <NUM> detected by the second water level sensor <NUM> is lower than a set water level, the operation of the vibrator <NUM> may be stopped.

The lowest water level at which operation is stopped may be determined based on the level of water stored in the second humidifying water tank <NUM> compared to the vibration level of the vibrator <NUM>.

The second water level sensor <NUM> may detect the upper and lower water levels at which the operation of the vibrator <NUM> can be optimal, at a position where the water in the second humidifying water tank <NUM> is higher than the lowest water level at which the vibrator <NUM> stops operating.

In the second humidifying water tank <NUM>, the water level sensor cover <NUM> is disposed between the second water level sensor <NUM> and the vibrator <NUM>, so that water level can be stably detected even when the vibrator <NUM> operates.

The vibrator <NUM> may operate when the water level detected by the second water level sensor <NUM> is a set water level or higher. The vibrator <NUM> may include two vibration elements <NUM>. Therefore, two vibration elements <NUM> can operate individually. Two vibration elements <NUM> can operate selectively.

When the vibrator <NUM> operates, the fan <NUM> may operate. Therefore, the humidified air generated by the vibrator <NUM> may be discharged to the outside of the humidifier together with the air flowing from the second humidifying water tank <NUM> to the first discharge flow path <NUM> by the fan <NUM>. The fan <NUM> may activate the flow of humidified air generated by the vibrator <NUM>.

The vibrator <NUM> and the heater <NUM> may operate simultaneously. At this time, the humidified air generated in the first humidifying water tank <NUM> flows to the first discharge flow path <NUM> through the second humidifying water tank <NUM> and, and the humidified air generated in the second humidifying water tank <NUM> may also flow to the first discharge flow path <NUM>.

The pump <NUM> flows water from the second humidifying water tank <NUM> to the first humidifying water tank <NUM>. The pump <NUM> may operate after the operation of the vibrator <NUM> is stopped. The pump <NUM> may operate after the second valve <NUM> closes the first connection pipe <NUM>. When the pump <NUM> operates, the first valve <NUM> closes the supply pipe <NUM>. When the pump <NUM> operates, the operation of the fan <NUM> may be stopped.

The recovery discharge hole <NUM> may be formed in one side of the height at which the vibrator <NUM> is located. The recovery discharge hole <NUM> is disposed at a lower position than the inlet hole <NUM> formed in the second humidifying water tank <NUM>. The pump <NUM> is disposed at a higher position than a position where the recovery discharge hole <NUM> and the recovery inlet hole <NUM> are formed. Therefore, water of the second humidifying water tank wall <NUM> may be sucked in, and water may be supplied to the first humidifying water tank <NUM>.

The pump <NUM> may operate in consideration of the water level of the first humidifying water tank <NUM> detected by the first water level sensor <NUM> and the water level of the second humidifying water tank <NUM> detected by the second water level sensor <NUM>. When the water level in the first humidifying water tank <NUM> is an optimal level, the operation of the pump <NUM> may be prevented.

The water stored in the first humidifying water tank <NUM> may be discharged to the outside through the drain pipe <NUM>. When the drain pipe valve <NUM> opens the drain pipe <NUM>, the water stored in the first humidifying water tank <NUM> may be discharged to the outside. The drain hole <NUM> formed in the first humidifying water tank <NUM> may be disposed in a position where the heater <NUM> is disposed. Water stored between the heater <NUM> and the first humidifying water tank <NUM> may flow into the drain pipe <NUM> through the drain hole <NUM>.

Referring to <FIG>, the position of the hole and the size of the pipe connected to the first humidifying water tank <NUM> will be described.

The pipe diameter 390D of the first connection pipe <NUM> may be larger than the pipe diameter 392D of the second connection pipe <NUM>. The pipe diameter 394D of the drain pipe <NUM> may be larger than the pipe diameter 390D of the first connection pipe <NUM>. The pipe diameter 310D of the communication pipe <NUM> may be larger than the pipe diameter 390D of the first connection pipe <NUM>.

The first connection pipe <NUM> may be connected to the first humidifying water tank <NUM> above the second connection pipe <NUM>. The drain pipe <NUM> may be connected to the first humidifying water tank <NUM> below the first connection pipe <NUM>. The communication pipe <NUM> may be connected to the first humidifying water tank <NUM> above the first connection pipe <NUM>.

The first temperature sensor <NUM> may be disposed between a position where the first connection pipe <NUM> is connected to the first humidifying water tank <NUM> and a position where the second connection pipe <NUM> is connected to the first humidifying water tank <NUM>.

Hereinafter, the structure and arrangement of the first connection pipe <NUM> according to another embodiment will be described with reference to <FIG>. The description will focus on the differences from the arrangement of the existing first connection pipe <NUM>. Structure not described below may be identified as the same structure as the structure described in <FIG>.

Referring to <FIG>, a portion of the first connection pipe <NUM> is disposed to be exposed to the outside of the humidifying module housing <NUM>. The first connection pipe <NUM> may include an exposure pipe 390a exposed to the outside of the humidifying module housing <NUM>.

Referring to <FIG> and <FIG>, the exposure pipe 390a may be disposed on the lower side of the air guide cover <NUM>. The exposure pipe 390a is disposed in contact with the air flowing into the air guide cover <NUM>.

Referring to <FIG>, the exposure pipe 390a may be disposed in the blowing flow path <NUM>. Therefore, when the fan <NUM> operates, a flow of air may occur around the exposure pipe 390a. The water that flows through the first connection pipe <NUM> and is supplied to the second humidifying water tank <NUM> may be cooled in the exposure pipe 390a.

Referring to <FIG>, a connection pipe hole 410a through which the first connection pipe <NUM> penetrates may be formed in one side of the humidifying module housing <NUM>. The connection pipe hole 410a may fix the arrangement of the first connection pipe <NUM>.

Referring to <FIG>, a portion of the first connection pipe <NUM> connecting the first humidifying water tank <NUM> and the second humidifying water tank <NUM> is disposed outside the humidifying module housing <NUM>. A portion of the first connection pipe <NUM> disposed outside the humidifying module housing <NUM> is disposed on the blowing flow path <NUM> so that the heated water flowing into the second humidifying water tank <NUM> may be cooled.

According to the humidifier of the present invention, one or more of the following effects are achieved.

When the temperature of the water heated in the first humidifying water tank is a set temperature or higher, water is supplied to the second humidifying water tank through a valve to humidify a completely sterilized water, thereby providing a user with clean humidified air.

In addition, when the temperature of the water in the second humidifying water tank is a certain temperature or lower, the vibrator operates and the stability of the vibrator can be ensured. This has an advantage of improving the reliability of the vibrator.

In addition, the connection pipe and the fan are operated to cool the water supplied to the humidifier, thereby stably operating the vibrator.

In addition, through the water softener, pure water from which ions are removed is heated, and through the first humidifying water tank in which the heater is disposed, the water sterilized by heating is humidified, and clean humidified air is provided to a user, thereby improving comfort in user's environment.

In addition, the water level and temperature inside the first humidifying water tank and the second humidifying water tank are sensed, and based on such information, the heater, the vibrator, the valve, and the fan are operated, thereby stably operating the humidifier.

Claim 1:
A humidifier comprising:
a water tank (<NUM>) for storing water;
a first humidifying water tank (<NUM>) disposed in a lower side of the water tank (<NUM>), and configured to heat water supplied from the water tank (<NUM>) by using a heater (<NUM>);
a second humidifying water tank (<NUM>) disposed in a lower side of the water tank (<NUM>), and configured to generate humidified air by using water supplied from the first humidifying water tank (<NUM>) by using a vibrator (<NUM>);
a first connection pipe (<NUM>) connecting the first humidifying water tank (<NUM>) and the second humidifying water tank (<NUM>);
a first valve (<NUM>) configured to open and close a flow path connecting the water tank (<NUM>) and the first humidifying water tank (<NUM>);
a second valve (<NUM>) configured to open and close the first connection pipe (<NUM>); and
a first temperature sensor (<NUM>) configured to detect a temperature of water inside the first humidifying water tank (<NUM>),
wherein the second valve (<NUM>) is configured to open the first connection pipe (<NUM>), when the temperature of water detected by the first temperature sensor (<NUM>) is equal to or higher than a first set temperature.