Patent Description:
An electric hair dryer is a commonly used household appliance, mainly used for hair drying and shaping. In addition, it can also be used for local drying, heating and physiotherapy in a laboratory, a physiotherapy room, industrial production, art designing and others, having a wide application.

At present, there are various styles of the electric hair dryer on the market, which mostly includes the handle portion and the main body. The handle portion and the main body of the electric hair dryer are mostly integrated with each other. The handle can also be designed to be bendable for storage. However, the whole structure is still not compact enough.

Examples of known hairdryers are to be found, for example, in <CIT>.

The present application provides an electric hair dryer, in which individual function modules are integrated in a cylindrical housing, providing the advantages of compactness and portability.

The present application is realized by adopting the following technical solution.

An electric hair dryer includes a housing, a wind energy generator, a drive control device and a heating device, an elongated channel is formed inside the housing, an air inlet is formed in the housing at one end of the channel, an air outlet is formed on the other end of the channel, a first mounting chamber, a second mounting chamber and a third mounting chamber are provided in the housing from the air inlet to the air outlet successively; the drive control device is mounted in the first mounting chamber, the wind energy generator is mounted in the second mounting chamber, the heating device is mounted in the third mounting chamber, the drive control device is electrically connected to the wind energy generator and the heating device. A diversion structure for guiding the heated air flow to the air outlet is provided between the heating device and the air outlet. A shock-absorbing sleeve is provided inside the second mounting chamber and positioned between the housing and the wind energy generator. An annular groove for accommodating the wind energy generator is provided in an inner ring of the shock-absorbing sleeve. A wire groove is provided in the outer wall of the shock-absorbing sleeve along the axial direction. Inside the second mounting chamber, a first housing body and a second housing body are each provided with a first arc rib and a second arc rib along the axial direction; and the first arc rib and the second arc rib are positioned circumferentially and form a groove gap extending along the axial direction. A protruding portion of the wire groove is inserted in the groove gap to form a stopper in the circumference direction.

In some embodiments, the housing includes a first housing body and a second housing body, the first housing body and the second housing body together define an elongated channel. In some embodiments, the air inlet is disposed in axial direction with respect to the channel. In some embodiments, the air inlet is disposed in radial direction with respect to the channel. In some embodiments, the air outlet is disposed in radial direction with respect to the channel.

With the above technical solution, the air inlet and the air outlet of the electric hair dryer are both provided in the housing, and are perpendicular to each other. The drive control device, the wind energy generator, the heating device and the diversion structure are all disposed inside the housing. The first housing body and the second housing body form the first mounting chamber, the second mounting chamber and the third mounting chamber in a line. That is, the housing of the electric hair dryer is in a continuous cylindrical shape. The air outlet is disposed on a radial sidewall of one end. The air flow can act directly on the human hair.

In some embodiments, the shock-absorbing sleeve is made of elastic material.

With the above technical solution, the shock-absorbing sleeve is disposed between the housing and the wind energy generator, which makes up the gap therebetween. In addition, by using the elastic of the shock-absorbing sleeve, a reacting force is generated to against the vibration force generated by the wind energy generator, which can counteract the majority of the vibration force, so that user feels a softer micro vibration when the hand holds the handle, which improves the comfort degree of the handle.

Further, the protruding portions on two edges of the wire groove each include an arc plate protruding to the outside along the radial direction. Two arc plates are wrapped around the groove edge of the wire groove in a semi-closed way. The wire groove is used for the penetration of the conductive wire, and the wire groove can be closed when bearing external pressure.

With the above technical solution, two arc plates of the wire groove facilitate hiding the wire after the conductive wire penetration. The conductive wire is temporarily restrained in the wire groove, which avoids the interference during mounting.

Further, the wind energy generator includes a micro motor and a wind blade driven by the micro motor, a sleeve ring is provided outside the micro motor. The wind blade is mounted on the main shaft of the micro motor. The sleeve ring is mounted outside the motor and extends to an outer ring of the wind blade. The blade outer ring of the wind blade is in a clearance fit with the inner wall of the sleeve ring. The sleeve ring of the wind energy generator is inserted in the annular ring of the shock-absorbing sleeve.

With the above technical solution, the mounting structure of the micro motor and the wind blade form an integrated structure after optimization, which is hidden inside the sleeve ring. The main body is inserted in the annular groove of the shock-absorbing sleeve through sleeve ring.

Further, an annular clamping groove is provided on the outer edge of one end of the shock-absorbing sleeve. The groove depth of the annular clamping groove is adapted to the first arc rib. One end of the shock-absorbing sleeve is inserted in one first arc rib, and the other end abuts against on the end surface of the other first arc rib.

With the above technical solution, one end of the shock-absorbing sleeve is inserted in one first arc rib through the annular clamping groove, and the other end abuts against on the end surface of the other first arc rib, so as to form an insertion stopper.

Further, the heating device is positioned at the rear of the air output of the wind energy generator. In this area, a heat insulation cover is provided inside the housing; the diversion structure is disposed on the heat insulation flamen retardant cover. The heat insulation cover includes a first cover body and a second cover body, which are separated from each other. An annular recess is provided on one side of the heat insulation cover at the wind energy generator. When mounting the first cover body and the second cover body, the first cover body and the second cover body are inserted in the first arc rib through the annular recess; an inner flanging is provided on one side of the end surface of the shock-absorbing sleeve abutting to the first arc rib. The first arc rib and the inner flanging abut against in the annular recess, and a hook portion formed by one groove sidewall of the annular recess is inserted in the inner flanging of the shock-absorbing sleeve to realize a sealing connection.

With the above technical solution, a heat insulation cover is provided at the rear of the wind energy generator. The heat insulation cover is hermetically sleeved on the wind energy generator, so as to ensure a full use of the wind energy generated by the win energy generator.

Further, the heating device includes a bearing plate enclosing a rectangular frame, a supporting frame positioned inside the rectangular frame and a heating wire provided in the supporting frame. The supporting frame includes supporting plates crossly overlapped with each other and a warm air channel formed by the distance between the supporting plates. A plurality of grooves are provided in an outer ring of the supporting plate. The coiled heating wire is inserted in the groove and is positioned in the warm wind channel. A positive terminal and a negative terminal are provided in the supporting frame, which are corresponding to two ends of the heating wire respectively. The terminal is electrically connected to the drive control device through conductive wire, and a fuse is added in a connection section of one terminal.

With the above technical solution, by using the detachable bearing plate and the supporting plate, it is convenient to change and repair the fuse.

Further, the diversion structure includes a diversion opening disposed on the first cover body, which is communicated with the air outlet. The diversion opening is adapted to the air outlet. A plurality of the diversion plates are provided in the inner wall of the diversion opening along the circumference direction. The diversion plates extend along the radial direction and are in an equidistant distribution along circumference direction. A vacancy position is provided on a tail end of the diversion opening. A protrusion protruding as a cylindrical shape is provided in the second cover body. The edges of the protrusion and the second cover body are in an arc transition, and the edges form a flow path. A splitter plate is provided in the second cover body at the position corresponding to the vacancy position of first cover body. The splitter plate divides the flow path of the second cover body into two independent portions. A bottom of the splitter plate in the flow path of the second cover body extends to the vacancy position of the first cover body.

With the above technical solution, the diversion structure diverts the air out appropriately by the structure thereof.

Further, the first cover body is gradually shrunk in the direction from the heating device to the diversion opening, so that the space of the flow path formed by the first cover body and the second cover body is slumped.

With the above technical solution, the air flow generated by the wind energy generator flows through the heating device and collects in the flow path. The air flow generated by the wind energy generator enters the flow path through the heater, and the diversion plates in the flow path stop the air flow. During stopping, the air pressure is increased and two short and powerful air flows are formed, and divert evenly out through the splitter plates in the diversion direction of the diversion plate.

Listing of reference signs: <NUM>. housing; <NUM>. first housing body; <NUM>. second housing body; <NUM>. air inlet; <NUM>. air outlet; <NUM>. first mounting chamber; <NUM>. second mounting chamber; <NUM>. third mounting chamber; <NUM>. wind energy generator; <NUM>. heating device; <NUM>. bearing plate; <NUM>. supporting plate; <NUM>. groove; <NUM>. cover plate; <NUM>. circuit board; <NUM>. temperature control switch; <NUM>. sensor; <NUM>. through hole; <NUM>. power switch; <NUM>. air volume adjusting switch; <NUM>. first arc rib; <NUM>. second arc rib; <NUM>. groove gap; <NUM>. heat insulation cover; <NUM>. first cover body; <NUM>. second cover body; <NUM>. diversion structure; <NUM>. diversion opening; <NUM>. diversion plate; <NUM>. vacancy position; <NUM>. protrusion; <NUM>. flow path; <NUM>. splitter plate; <NUM>. stopping block; <NUM>. annular recess; <NUM>. fourth mounting chamber; <NUM>. micro motor; <NUM>. wind blade; <NUM>. sleeve ring; <NUM>. shock-absorbing sleeve; <NUM>. annular groove; <NUM>. annular clamping groove; <NUM>. wire groove; <NUM>. arc plate; and <NUM>. inner flanging.

The present application will be further described in detail below in combination with figures.

Referring to <FIG> and <FIG>, an electric hair dryer includes a housing <NUM>. In some embodiment, the housing <NUM> is an integrated housing and an elongated channel such as is formed therein, such as cylindrical, rectangular, or similarly shaped channel. In some embodiments, the housing <NUM> includes a first housing body <NUM> and a second housing body <NUM>. In some embodiments, the first housing body <NUM> is in snap connection with the second housing body <NUM>. The first housing body <NUM> and the second housing body <NUM> form an elongated channel, such as a cylindrical channel. An air inlet <NUM> is formed in the housing <NUM> at one end of the channel. In some embodiments, the air inlet <NUM> is disposed in axial direction with respect to the channel, as shown in <FIG>. In some embodiments, the air inlet <NUM> is disposed in radial direction with respect to the channel, for example, disposed in the sidewall of the housing <NUM>. A cover plate <NUM> with a plurality holes is mounted at the air inlet <NUM>. The cover plate <NUM> can close the air inlet <NUM> and the air flow can penetrate through the holes of the cover plate <NUM>.

An air outlet <NUM> disposed in radial direction is formed on the other end of the housing <NUM>. The air outlet <NUM> is positioned in the first housing <NUM> and is communicated with the channel.

A first mounting chamber <NUM>, a second mounting chamber <NUM> and a third mounting chamber <NUM> are provided in the housing <NUM> from the air inlet side <NUM> to the air outlet side <NUM> successively. A drive control device is mounted in the first mounting chamber <NUM> (not shown in the figure). The wind energy generator <NUM> is mounted in the second mounting chamber. A heating device <NUM> for providing heat for the wind energy generator <NUM> is mounted in the third mounting chamber. The drive control device is electrically connected to the wind energy generator <NUM> and the heating device <NUM> through a conductive wire.

A plurality of threaded columns are provided in the first housing body <NUM> of the first mounting chamber <NUM>. The drive control device is fixed on the threaded column in the first mounting chamber <NUM> via a fastener.

Referring to <FIG>, inside the second mounting chamber <NUM>, the first housing body <NUM> and the second housing body <NUM> are each provided with a first arc rib <NUM> and a second arc rib <NUM> along the axial direction. The first arc rib <NUM> and the second arc rib <NUM> are distributed along circumference of the housing <NUM>. The first arc ribs <NUM> are positioned at the front and rear sides of the second mounting chamber <NUM> along axial direction respectively. The second arc ribs <NUM> are positioned at intervals between the first arc ribs <NUM> at the front and the rear sides respectively. The inner arc surfaces of the first arc ribs in the first housing body <NUM> and the second housing body <NUM> form a concentric circle along the circumference direction. The inner arc surfaces of the second arc ribs also form a concentric circle along the circumference direction. The concentric circle formed by the second arc ribs <NUM> has a smaller diameter than the concentric circle formed by the first arc ribs <NUM>. The wind energy generator <NUM> is inserted in the area formed by the first arc rib <NUM> and the second arc rib <NUM>.

In particular, the wind energy generator <NUM> includes a micro motor <NUM> and a wind blade <NUM> driven by the micro motor <NUM>. A sleeve ring <NUM> is provided outside the micro motor <NUM>. The wind blade <NUM> is mounted on the main shaft of the micro motor <NUM>. The sleeve ring <NUM> is mounted at the outside of the motor and extends to an outer ring of the wind blade <NUM>. The blade outer ring of the wind blade <NUM> is in a clearance fit with the inner wall of the sleeve ring <NUM>.

Referring to <FIG> and <FIG>, a shock-absorbing sleeve <NUM> made of elastic material is provided between the sleeve ring <NUM> and the housing <NUM>. In particular, the shock-absorbing sleeve <NUM> can be made of rubber or silica gel, and has a certain thickness to ensure a sufficient damping effect. The micro motor <NUM> is sleeved and mounted in the shock-absorbing sleeve <NUM>. An annular groove <NUM> for accommodating the sleeve ring <NUM> is provided in an inner ring of the shock-absorbing sleeve <NUM>. The shock-absorbing sleeve <NUM> has a certain elasticity. The micro motor <NUM> is inserted and wrapped in the annular groove <NUM>. An annular clamping groove <NUM> is provided on the outer edge of one end of the shock-absorbing sleeve <NUM>. The groove depth of the annular clamping groove <NUM> is adapted to the first arc rib <NUM>. When the first arc rib <NUM> is inserted in the annular clamping groove <NUM> of the shock-absorbing sleeve <NUM>, the outer wall abuts against the second arc rib <NUM>, and the end of the shock-absorbing sleeve <NUM> away from the annular clamping groove <NUM> abuts against the sidewall of the other first arc rib, so that the shock-absorbing sleeve <NUM> is confined in the area formed by the first arc rib <NUM> and the second arc rib <NUM>.

The first arc rib <NUM> and the second arc rib <NUM> are distributed along circumference of the housing <NUM> and form a groove gap <NUM> extending along the axial direction on the inner walls of the first housing body <NUM> and the second housing body <NUM>. A wire groove <NUM> is provided in the outer wall of the shock-absorbing sleeve <NUM> along the axial direction. Two edges of the wire groove <NUM> each provides with an arc plate <NUM> protruding outwardly along the radial direction. Two arc plates <NUM> are wrapped around the groove edge of the wire groove <NUM>, and are disposed as semi-closed. The wire groove is used for the penetration of the conductive wire. The wire groove <NUM> can be closed when two arc plates <NUM> are pressed. The protrusion portions of two arc plates are inserted in the groove gap <NUM> of the first housing body <NUM> or the second housing body <NUM>, so as to form a limit in the circumference direction.

Referring to <FIG>, <FIG> and <FIG>, the heating device is positioned at the rear of the air output of the wind energy generator <NUM>. In this area, a heat insulation cover <NUM> is provided inside the housing <NUM>. The heat insulation cover <NUM> is made of a blend of PA and glass fiber.

The heat insulation cover <NUM> includes a first cover body <NUM> and a second cover body <NUM>. The first cover body <NUM> is fixed with the second cover body <NUM> through the threaded column and the screw. The first cover body <NUM> is inserted in the first housing body <NUM>. The heat insulation cover <NUM> includes a fourth mounting chamber <NUM> for accommodating the heating device <NUM> and a diversion structure <NUM> for guiding the heated air flow to the air outlet <NUM>. A stopping block <NUM> is provided on the boundary of the fourth mounting chamber <NUM> and the diversion structure <NUM>. The heating device <NUM> is limited in the fourth mounting chamber <NUM>, which avoids the displacement of the heating device <NUM> towards the air outlet <NUM>.

An annular recess <NUM> is provided on one side of the heat insulation cover <NUM> at the wind energy generator. When mounting the first cover body <NUM> and the second cover body <NUM>, the first cover body <NUM> and the second cover body <NUM> are inserted in the first arc rib <NUM> through the annular recess <NUM>. An inner flanging <NUM> is provided on one side of the end surface of the shock-absorbing sleeve <NUM> abutting against the first arc rib <NUM>. The first arc rib <NUM> and the inner flanging <NUM> abut against in the annular recess <NUM>, and a hook portion formed by one groove sidewall of the annular recess <NUM> is inserted in the inner flanging <NUM> of the shock-absorbing sleeve <NUM> to realize a sealing connection, so as to prevent the air flow sent into the wind energy generator <NUM> from lateral leakage.

Referring to <FIG>, the heating device <NUM> includes a bearing plate <NUM> forming a rectangular frame, a supporting frame positioned inside the rectangular frame and a heating wire provided in the supporting frame. The supporting frame includes supporting plates <NUM> crossly overlapped with each other and a warm air channel formed by the gap between the supporting plates <NUM>. A plurality of grooves <NUM> are provided in an outer ring of the supporting plate <NUM>. The coiled heating wire is inserted in the groove <NUM> and is positioned in the warm wind channel. A positive terminal and a negative terminal are provided in the supporting frame, which are corresponding to two ends of the heating wire respectively. The terminal is electrically connected to the drive control device through conductive wire, and a fuse is added in a connection section of one terminal (the portion being shielded is not shown).

The bearing plate <NUM> and the supporting plate <NUM> are both made of connected mica sheets, which have the functions of insulation and thermal resistance achieving low loss.

The bearing plate <NUM> includes four main portions capable of being independently bended. After bending to form a rectangular frame, it is attached to the outside of the supporting frame and bonded with high-temperature resistant tape. In order to ensure safety, a layer of asbestos net is provided between the rectangular frame and the heat insulation cover <NUM> for flame retardant protection. In addition, the asbestos net can disperse the heat on the bearing plate <NUM> to achieve the effect of heat dissipation.

Referring to <FIG> and <FIG>, a temperature control module is provided inside the first housing body <NUM>. The temperature control module includes a circuit board <NUM>, and a temperature control switch <NUM> electrically connected to the circuit board <NUM> for controlling the opening and closing of the heating device <NUM>. The circuit board <NUM> is electrically connected to the drive control device. The circuit board <NUM> is positioned between the first housing body <NUM> and the first cover body <NUM>. The circuit board <NUM> is mounted on the first housing body <NUM> through screw. A sensor <NUM> is provided on the circuit board <NUM>. The sensor <NUM> can be a temperature sensor or a humidity/temperature sensor. A penetrating through hole <NUM> is provided at the position of the first cover body <NUM> close to the air inlet <NUM>. The sensor <NUM> extends out of the through hole <NUM> to detect the temperature and/or humidity at the air outlet <NUM>.

A power switch <NUM> for controlling the opening of the wind energy generator <NUM> is provided in the second housing <NUM>, and an air volume adjusting switch <NUM> for controlling the rotating speed of the wind energy generator <NUM> is also included. The power source is electrically connected to the air volume adjusting switch <NUM> and the drive control device.

The diversion structure <NUM> for guiding the air flow to the air outlet <NUM> includes a diversion opening <NUM> disposed on the first cover body <NUM> and communicated with the air outlet <NUM>. The diversion opening <NUM> is adjacent to the air outlet <NUM>. A plurality of the diversion plates <NUM> are provided in the inner wall of the diversion opening <NUM> along the circumference direction. The diversion plates <NUM> extend along the radial direction and are in an equidistant distribution along circumference direction. A vacancy position <NUM> without the diversion plate <NUM> is provided at a tail end of the diversion opening <NUM>.

A cylindrical protrusion <NUM> is provided in the second cover body <NUM>. The edges of the protrusion <NUM> and the second cover body <NUM> are in an arc transition, and the edges form a flow path <NUM>. A splitter plate <NUM> is provided in the second cover body <NUM> at the position corresponding to the vacancy position <NUM> of first cover body <NUM>. The splitter plate <NUM> divides the flow path <NUM> of the second cover body <NUM> into two independent portions. A bottom of the splitter plate <NUM> in the flow path <NUM> of the second cover body <NUM> extends to the vacancy position <NUM> of the first cover body <NUM>. The first cover body <NUM> is gradually shrunk in the direction from the heating device <NUM> to the diversion opening <NUM>, so that the space of the flow path <NUM> formed by the first cover body <NUM> and the second cover body <NUM> is greatly reduced. The air flow generated by the wind energy generator <NUM> flows through the heating device <NUM> and collects in the flow path <NUM>. The air flow generated by the wind energy generator <NUM> enters the flow path <NUM> through the heater, and the diversion plates <NUM> in the flow path <NUM> block the air flow, by which the air pressure is increased and two short and powerful air flows are formed and evenly guided out via the splitter plates <NUM> in the diversion direction of the diversion plate <NUM>.

The above are the preferred embodiments of the present application, which are not intend to limit the protection scope of the present application. Therefore, all equivalent changes made according to the structure, shape and principle of the present application should be covered within the protection scope of the present invention as long as they fall within the protection scope as defined by the appended claims. space of the flow path <NUM> formed by the first cover body <NUM> and the second cover body <NUM> is greatly reduced. The air flow generated by the wind energy generator <NUM> flows through the heating device <NUM> and collects in the flow path <NUM>. The air flow generated by the wind energy generator <NUM> enters the flow path <NUM> through the heater, and the diversion plates <NUM> in the flow path <NUM> block the air flow, by which the air pressure is increased and two short and powerful air flows are formed and evenly guided out via the splitter plates <NUM> in the diversion direction of the diversion plate <NUM>.

Claim 1:
An electric hair dryer, comprising a housing (<NUM>), further comprising a wind energy generator (<NUM>), a drive control device and a heating device (<NUM>), wherein an elongated channel is formed inside the housing (<NUM>), an air inlet (<NUM>) is formed in the housing (<NUM>) at one end of the channel, an air outlet (<NUM>) is formed on the other end of the channel; a first mounting chamber (<NUM>), a second mounting chamber (<NUM>) and a third mounting chamber (<NUM>) are provided in the housing (<NUM>) from the air inlet (<NUM>) to the air outlet (<NUM>) successively; the drive control device is mounted in the first mounting chamber (<NUM>), the wind energy generator (<NUM>) is mounted in the second mounting chamber (<NUM>), the heating device (<NUM>) is mounted in the third mounting chamber (<NUM>), and the drive control device is electrically connected to the wind energy generator (<NUM>) and the heating device (<NUM>);
a diversion structure (<NUM>) for guiding the heated air flow to the air outlet (<NUM>) is provided between the heating device (<NUM>) and the air outlet (<NUM>);
a shock-absorbing sleeve (<NUM>) is provided inside the second mounting chamber (<NUM>) and positioned between the housing (<NUM>) and the wind energy generator (<NUM>); and an annular groove (<NUM>) for accommodating the wind energy generator (<NUM>) is provided in an inner ring of the shock-absorbing sleeve (<NUM>);
a wire groove (<NUM>) is provided in the outer wall of the shock-absorbing sleeve (<NUM>) along the axial direction;
inside the second mounting chamber (<NUM>), a first housing body (<NUM>) and a second housing body (<NUM>) are each provided with a first arc rib (<NUM>) and a second arc rib (<NUM>) along the axial direction; the first arc rib (<NUM>) and the second arc rib (<NUM>) are positioned circumferentially and form
a groove gap (<NUM>) extending along the axial direction; and a protruding portion of the wire groove (<NUM>) is inserted in the groove gap (<NUM>) to form a stopper in circumference direction.