Patent Description:
A cleaning appliance is an appliance for cleaning the indoor by sucking particles such as dust. It is general that a conventional cleaning appliance comprises a housing provided with an intake unit and an exhaust unit, a fan for moving the air entering the intake unit to the exhaust unit, a separator for separating particles from the air moving by the fan, a battery for supplying a power to the fan, and a handle provided in the housing.

Meanwhile, the conventional cleaning apparatus has a problem in that the center of gravity of the appliance is formed at a position far away from the handle because the intake unit is provided on a front surface of the housing, the handle is provided on a rear surface of the housing and the separator and the fan, which are heavy parts, are provided inside the housing.

The case that the center of gravity of the cleaning appliance is far away from the handle means that the center of gravity of the cleaning appliance is far away from a user's wrist, and if the center of gravity of the cleaning appliance is far away from a user's wrist, a problem occurs in that a big force is required for direction switching or position change of the cleaning appliance.

Also, the fan provided in the conventional cleaning appliance is generally provided to discharge the air toward the handle. However, in this case, since the air is discharged to the user's hands which are gripping the handle, a problem occurs in that displeasure is caused to the user. <CIT> relates to a handheld vacuum cleaner, including a main body, a motor assembly positioned within the main body, and a dirty air inlet positioned at a front of the handheld vacuum cleaner and extending along an inlet axis. The handheld vacuum cleaner also includes a cyclonic chamber in fluid communication with the dirty air inlet and the motor assembly. The cyclonic chamber defines a separator axis. The inlet axis and the separator axis intersect to form an acute angle extending between the dirty air inlet and the cyclonic chamber. The acute angle is within the range of <NUM> to <NUM> degrees such that when the handheld vacuum cleaner is operated in a normal operating condition with the dirty air inlet pointed downwardly the separator axis is oriented vertically.

An object of the present invention is to provide a cleaning appliance of which handling is easy.

Another object of the present invention is to provide a cleaning appliance which is capable of preventing the air from being discharged toward a user's hands. The invention is specified by the independent claim.

The present invention provides a cleaning appliance comprising a housing provided in a hollow cylinder shape, having an intake unit and an exhaust unit; a fan provided to include an impeller located in the housing, a rotary shaft to which the impeller is fixed, and a motor rotating the rotary shaft, moving the air entering the housing through the intake unit to the exhaust unit; a particle separator provided inside the housing to provide a path for guiding the air entering the intake unit to the impeller, separating particles from the air by using a centrifugal force; a battery housing located at a point spaced apart from a point where the intake unit is located, as much as <NUM>°, in a space provided by a circumferential surface of the housing and protruded to be far away from the circumferential surface of the housing; a battery provided in the battery housing, supplying a power to the motor; and a handle provided to connect the circumferential surface of the housing with the battery housing, wherein the rotary shaft is inclined at an angle greater than <NUM>° and smaller than <NUM>° toward a direction where the handle is located based on a vertical line passing through the center of gravity of the particle separator.

The housing includes a first housing providing a space in which the particle separator is stored, provided with the intake unit on a circumferential surface; a second housing providing a space in which the fan is stored, inclined from an upper end of the first housing toward a direction where the handle is located; a first cover provided to open or close a lower surface of the first housing; and a second cover provided to open or close an upper surface of the second housing and provided with the exhaust unit.

The rotary shaft may be provided to be inclined at an angle of <NUM>° to <NUM>° toward a direction where the handle is located based on a straight line passing through the center of gravity of the particle separator.

The rotary shaft may be provided to be inclined at an angle of <NUM>° toward a direction where the handle is located based on a straight line passing through the center of gravity of the particle separator.

The angle of the second housing inclined toward the handle based on the vertical line passing through the center of gravity of the particle separator is set to be equal to the angle of the rotary shaft inclined toward the handle.

The handle may include a bar shaped handle body extended from the battery housing toward the second housing; and a bar shaped connection body connecting the handle body with a circumferential surface of the second housing.

A length of the battery from the circumferential surface of the first housing toward a direction headed for the handle may be set to be longer than a length of the battery toward a height direction of the first housing and a length of the battery toward a diameter direction of the first housing.

The center of gravity of the fan may be located between the center of gravity of the particle separator and the center of gravity of the battery, and the center of gravity of the battery may be located between the center of gravity of the fan and the center of gravity of the handle.

The center of gravity of the fan may be located above a reference line passing through the center of the intake unit, the center of gravity of the particle separator and the center of gravity of the battery may be located below the reference line, and the center of gravity of the handle may be located on the reference line or below the reference line.

The center of gravity of the fan, the center of gravity of the particle separator, the center of gravity of the battery and the center of gravity of the handle may all be located on a single vertical plane that includes the reference line.

The particle separator may include a partition provided inside the housing, partitioning the first housing and the second housing from each other; a partition through hole provided to pass through the partition; chamber bodies provided in a hollow cylinder shape, having one end fixed to the partition and the other end which is in contact with the first cover, and partitioning an inner space of the first housing into a first chamber communicated with the intake unit and a second chamber communicated with the partition through hole; a body partition partitioning an inner space of the second chamber into a first space communicated with the partition through hole and a second space which is not communicated with the partition through hole; a communication hole provided to pass through the chamber bodies to communicate the first space with the first chamber; a path body provided in a pipe surrounding the partition through hole, having one end fixed to the partition and the other end communicated with the second space by passing through the body partition; a discharge pipe provided as a pipe extended from the partition through hole toward the body partition and provided inside the path body; an inlet provided to pass through the path body, guiding the air supplied to the communication hole to the inside the path body; and an air flow forming portion provided in a screw shape between the discharge pipe and the path body, rotating the air entering the inlet inside the path body.

The fan may include a case provided in the second housing, storing the impeller therein; a case intake hole provided on one surface of the case headed for the partition through hole to allow the air to enter the inside of the case; and a case exhaust hole provided on one surface of the case headed for the exhaust unit to discharge the air inside the case to the outside.

The cleaning appliance of the present invention may further comprise a first filter located between the partition through hole and the case intake hole, filtering the air; and a second filter located between the case exhaust hole and the exhaust unit to filter the air, wherein the second filter may be provided to filter particles smaller than those filtered by the first filter.

The present invention may provide a cleaning appliance that improves a user's convenience (handling) by decentering the center of gravity of components constituting the cleaning appliance based on a user's wrist.

Also, the present invention may provide a cleaning appliance which is capable of preventing the air from being discharged toward a user's hands.

Hereinafter, the present invention will be described with reference to drawings and embodiments, which specifically specify components of the present invention but are used to assist understanding of the present invention.

Also, specific components in the following embodiment may be exaggerated or downsized for convenience of description and understanding. Therefore, the present invention is not limited to the embodiment described below, and various corrections and modifications may be made from the embodiment by the person with ordinary skill in the art to which the present invention pertains.

<FIG> and <FIG> illustrate an example of a cleaning appliance <NUM> of the present invention. The cleaning appliance of the present invention comprises a housing <NUM> provided in a hollow cylinder shape, an intake unit <NUM> and an exhaust unit <NUM> provided in the housing <NUM>, a fan <NUM> (see <FIG>) provided inside the housing, moving the air from the intake unit <NUM> to the exhaust unit <NUM>, a particle separator <NUM> (see <FIG>) guiding the air entering the intake unit <NUM> to the fan <NUM> and separating particles from the air by using a centrifugal force, and a handle <NUM> provided in the housing <NUM> to allow a user to grip it.

The handle <NUM> may be provided to be located at a point (point spaced as much as <NUM>°) symmetrical to a point, in which the intake unit <NUM> is located, from a space provided by a circumferential surface of the housing <NUM>.

The housing <NUM> includes a first housing <NUM> providing a space in which the particle separator <NUM> is stored, and a second housing <NUM> provided to be communicated with the first housing <NUM>, providing a space in which the fan <NUM> is stored. <FIG> illustrates an example of a case that the second housing <NUM> is located above the first housing <NUM>.

The first housing <NUM> and the second housing <NUM> may be provided in a hollow cylinder shape. The second housing <NUM> is provided to be inclined from an upper end of the first housing <NUM> toward a direction (direction of a position of the handle) opposite to a position of the intake unit <NUM>.

The intake unit <NUM> is provided on a circumferential surface of the first housing <NUM> to allow the external air to enter the inside of the first housing. As shown in <FIG>, the intake unit <NUM> may include an intake hole <NUM> provided to pass through the first housing <NUM>, and an intake pipe <NUM> extended from the intake hole <NUM> toward a direction (direction far away from the handle, Y-axis direction) far away from the center of the first housing <NUM>.

Although not shown, the cleaning appliance of the present invention may further include an extension pipe detachably provided in the intake pipe <NUM>, and a nozzle provided on a free end of the extension pipe to move particles to the extension pipe.

The exhaust unit <NUM> is provided to pass through an upper surface or a circumferential surface of the second housing <NUM> and discharges the air inside the second housing <NUM> to the outside. <FIG> illustrates an example of a case that the exhaust unit <NUM> is provided on the upper surface of the second housing <NUM>.

The exhaust unit <NUM> may include an upper through hole <NUM> (see <FIG>) provided to pass through the upper surface of the second housing <NUM>. A cover <NUM> (second cover) is provided to open or close the upper through hole. An exhaust hole <NUM> may be provided to pass through the second cover.

Since the second housing <NUM> is provided to be inclined toward the handle <NUM> and the exhaust hole <NUM> is located on the upper surface of the second housing <NUM>, the air discharged through the exhaust hole <NUM> is not headed for the handle <NUM>.

If the exhaust unit <NUM> is provided on the circumferential surface of the second housing <NUM>, the exhaust unit <NUM> may be provided with a plurality of exhaust holes passing through the circumferential surface of the second housing <NUM>. In this case, the exhaust holes should be provided in an area, which is opposite to the position of the handle <NUM>, in a space provided by the circumferential surface of the second housing <NUM>. This is to allow the air discharged from the exhaust hole to prevent from being headed for the handle <NUM>.

As shown in <FIG>, the first housing <NUM> may further be provided with a discharge unit <NUM> for discharging particles stored in the housing <NUM> to the outside. The discharge unit <NUM> may include a lower through hole <NUM> provided to pass through a bottom surface (one surface of the first housing located to be opposite to the exhaust hole) of the first housing <NUM>. A cover <NUM> (first cover) is provided for opening or closing the lower through hole.

The first cover <NUM> may rotatably be provided in the first housing <NUM>. In this case, as shown in <FIG>, a shaft <NUM> forming a rotation center of the first cover and a fastening unit <NUM> provided to face the shaft <NUM> may be provided on the circumferential surface of the first housing <NUM>, and a first fastening unit <NUM> coupled to the shaft <NUM> and a second fastening unit <NUM> provided on a free end of the first cover <NUM> and detachably coupled to the fastening unit <NUM> may be provided in the first cover <NUM>.

Moreover, a sealing portion <NUM> compressed between the first housing <NUM> and the first cover <NUM> when the lower through hole <NUM> is closed may further be provided in the first cover <NUM>. Preferably, the sealing portion <NUM> is made of an elastic body such as rubber.

As described above, the fan <NUM> is provided in the second housing <NUM> to move the air of the housing <NUM> to the exhaust unit <NUM>, and the particle separator <NUM> is provided in the first housing <NUM> and provides a path for guiding the air entering the intake unit <NUM> to the fan <NUM>. Particles such as dust contained in the air are separated from the air by a centrifugal force while the particle separator <NUM> is moving to the fan <NUM> along the path. A detailed structure of the particle separator is as follows.

The particle separator <NUM> includes a chamber forming portion <NUM> for forming a first chamber 41a and a second chamber 41b inside the first housing <NUM>, and a cyclone forming portion <NUM> for forming an air current arousing a centrifugal force while supplying the air inside the second chamber 41b to the fan <NUM>.

The chamber forming portion <NUM> may include a partition <NUM> provided inside the housing <NUM>, partitioning the first housing <NUM> and the second housing <NUM> from each other, chamber bodies <NUM> and <NUM> provided as a cylinder having one end fixed to the partition <NUM> and the other end which is in contact with the first cover <NUM>, partitioning an inner space of the first housing into two chambers 41a and 41b, and a body partition <NUM> for partitioning the second chamber 41b formed inside the chamber body <NUM> into a first space <NUM> and a second space <NUM>.

The partition <NUM> may be provided even in any shape that can partition the inner space of the first housing from an inner space of the second housing. The partition <NUM> is provided with a partition through hole <NUM> provided to pass through the partition.

The chamber bodies may be provided as a first body <NUM> fixed to the partition <NUM> and a second body <NUM> fixed to the first body. In this case, the partition through hole <NUM> should be provided to communicate the second chamber 41b with the inner space of the second housing. That is, the first body <NUM> should be provided in a shape surrounding the partition through hole <NUM>.

The first body <NUM> and the second body <NUM> may be provided in a hollow cylinder shape, and the second body <NUM> may be provided such that its one end is fixed to a free end of the first body <NUM> and its other end is in contact with the sealing portion <NUM> of the first cover.

A plurality of communication holes <NUM> for communicating the first chamber 41a with the first space <NUM> are provided on a circumferential surface of the first body <NUM>. Therefore, the air entering the first chamber 41a through the intake unit <NUM> may be supplied to the first space <NUM> of the second chamber 41b through the communication holes <NUM>.

A discharge hole <NUM> (see <FIG>) is provided on one surface of the second body <NUM> which is in contact with the sealing portion <NUM> of the first cover. The particles stored in the second body <NUM> may be discharged to the outside of the housing through the discharge hole <NUM> when the first cover body opens the lower through hole <NUM>.

The body partition <NUM> is fixed to any one of the first body <NUM> and the second body <NUM> to partition the inside of the second chamber 41b into two spaces <NUM> and <NUM>. The first space <NUM> is a space communicated with the partition through hole <NUM>, and the second space <NUM> is a space which is not communicated with the partition through hole <NUM>.

As shown in <FIG>, the cyclone forming portion <NUM> may include a path body <NUM> of which one end is fixed to the partition <NUM> and the other end is communicated with the second space <NUM> by passing through the body partition <NUM>, a discharge pipe <NUM> located inside the path body <NUM> and communicated with the partition through hole <NUM>, an inlet <NUM> provided to pass through a circumferential surface of the path body <NUM>, and an air flow forming portion <NUM> provided between an outer circumferential surface of the discharge pipe <NUM> and an inner circumferential surface of the path body.

The path body <NUM> is provided as a pipe surrounding the partition through hole <NUM>, and the discharge pipe <NUM> is located inside the path body <NUM>. The path body <NUM> is communicated with the second space <NUM> through a particle discharge hole <NUM> provided one a free end (bottom surface of the path body). The path body <NUM> may be provided to have a diameter which becomes smaller toward the free end. This is to strongly maintain intensity of the air flow formed in the path body <NUM>.

The air flow forming portion <NUM> is provided in a screw shape, and the inlet <NUM> is located to be higher than the air flow forming portion <NUM>. Therefore, the air entering the path body <NUM> through the inlet <NUM> when the fan <NUM> is operated will move (cyclone movement) to be rotated inside the path body <NUM> in the middle of moving to the discharge pipe <NUM> through the air flow forming portion <NUM>.

If cyclone movement occurs inside the path body <NUM>, the particles contained in the air move to a rim (the circumferential surface of the path body) of the path by means of a centrifugal force and then will be discharged to the second space <NUM> by means of gravity.

Unlike the shown drawing, the inlet <NUM> may be provided as a hole provided to pass through an upper surface of the path body <NUM>. In this case, an upper end of the path body <NUM> should be provided to be spaced apart from the partition <NUM> without being fixed to the partition <NUM>. Since the path body <NUM> is fixed to the partition <NUM> through the air flow forming portion <NUM> and the discharge pipe <NUM>, the path body <NUM> may maintain a state fixed to the partition <NUM> even though the upper end of the path body <NUM> is spaced apart from the partition <NUM>.

The cyclone forming portion <NUM> having the aforementioned structure may be provided with a plurality of cyclone forming portions. <FIG> illustrates an example of a particle separator <NUM> provided with nine cyclone forming portions <NUM>.

As shown in <FIG>, the fan <NUM> may include a case <NUM> provided in the second housing <NUM>, an impeller <NUM> rotatably provided inside the case, and a motor <NUM> fixed to the case, rotating the impeller <NUM>.

The case <NUM> is provided with a case intake hole <NUM> and a case exhaust hole <NUM>, and it is preferable that the case intake hole <NUM> is provided on one surface of the case <NUM> headed for the partition through hole <NUM> and the case exhaust hole <NUM> is provided to pass through one surface of the case <NUM> headed for the exhaust hole <NUM>. This is to minimize path resistance between the partition through hole <NUM> and the exhaust hole <NUM>.

The motor <NUM> is fixed to a support <NUM> provided in the case <NUM>. <FIG> illustrates an example of a case that the support <NUM> is located between the case intake hole <NUM> and the case exhaust hole <NUM> and a rotary shaft <NUM> is connected to the impeller <NUM> by passing through the support <NUM>. That is, the motor <NUM> may include a fixed unit <NUM> fixed to the support <NUM>, a stator <NUM> provided inside the fixed unit, and a permanent magnet <NUM> fixed to a free end (one of a rotary shaft located inside the fixed unit) of the rotary shaft <NUM>.

The motor <NUM> may be provided to be supplied with a power through a power source provided indoor, or may be provided to be supplied with a power through the battery <NUM> detachably provided in the housing <NUM>.

Meanwhile, for filtering particles which are not removed through the particle separator <NUM>, the present invention may further include at least one of a first filter <NUM> and a second filter <NUM>. <FIG> illustrates an example of a case that the first filter <NUM> and the second filter <NUM> are provided in the cleaning appliance <NUM> of the present invention.

The first filter <NUM> may be located between the second communication hole <NUM> and the case intake hole <NUM> and provided to filter the air, and the second filter <NUM> may be located between the case exhaust hole <NUM> and the exhaust hole <NUM> and provided to filter the air.

The first filter <NUM> and the second filter <NUM> may be provided to filter particles having the same size, or may be provided to filter particles having different sizes. In the latter case, it is preferable that the second filter <NUM> filters particles smaller than those filtered by the first filter <NUM>. This is to minimize the amount of fine dust discharged to an indoor space.

Hereinafter, an operation process of the cleaning appliance having the aforementioned structure will be described with reference to <FIG>.

If a power is supplied to the motor <NUM> to rotate the impeller <NUM>, the air enters the first chamber 41a through the intake pipe <NUM> and the intake hole <NUM>. A guide <NUM> for allowing the air discharged from the intake hole <NUM> to enter the first chamber 41a along a tangent direction of a circumferential surface of the first chamber 41a is provided in the intake pipe <NUM>. Therefore, the air entering the first chamber 41a will cyclone move along the circumferential surface of the first chamber 41a.

If the air cyclone moves inside the first chamber 41a, particles will move to the circumferential surface of the first chamber 41a by a centrifugal force and then move to the first cover <NUM> provided on the bottom surface of the first housing by gravity, and the air will enter the second chamber 41b through the communication holes <NUM>.

The air entering the second chamber 41b moves to the path body <NUM> through the inlet <NUM>, and the air entering the path body <NUM> will cyclone move during the process of passing through the air flow forming portion <NUM>.

If cyclone movement occurs in the path body <NUM>, the particles contained in the air move to the circumferential surface of the path body <NUM> by a centrifugal force and then discharged to the second space <NUM> by gravity, and the air will be discharged to the outside of the housing <NUM> through the discharge pipe <NUM>, the partition through hole <NUM>, the case intake hole <NUM>, the case exhaust hole <NUM>, and the exhaust hole <NUM>.

A user may remove the particles collected in the second space <NUM> and the first chamber 41a by rotating the first chamber <NUM> to open the lower through hole <NUM>.

As shown in <FIG> and <FIG>, it is preferable that a straight line V2 passing through the center of gravity G2 of the fan <NUM> is provided to be inclined at an angle A greater than <NUM>° and smaller than <NUM>° based on a straight line V1 passing through the center of gravity G1 of the particle separator. That is, it is preferable that the rotary shaft <NUM> is provided to be inclined at an angle A greater than <NUM>° and smaller than <NUM>° based on a straight line V1 passing through the center of gravity G1 of the particle separator toward a direction where the handle <NUM> is located.

If the rotary shaft <NUM> is provided in a direction orthogonal to the straight line V1 passing through the center of gravity G1 of the particle separator, the air may be discharged toward a direction where the handle <NUM> is located, whereby problems may occur in that displeasure is caused to a user and fine dust is sprayed to a user.

Meanwhile, if the particle separator <NUM> and the fan <NUM> are located up and down and thus the rotary shaft <NUM> is located on a straight line V1 passing through the center of gravity of the particle separator <NUM>, a problem may occur in that the center of gravity G1 of the particle separator and the center of gravity G2 of the fan are all located in front of the handle <NUM>. The case that the center of gravity of the cleaning apparatus is far away from the handle <NUM> means that the center of gravity of the cleaning apparatus is located to be far away from the user's wrist, and if the center of gravity of the cleaning appliance is far away from the user's wrist, a problem occurs in that a big force is required for direction switching or position change of the cleaning appliance.

The angle A set in the rotary shaft <NUM> may solve the above two problems. That is, since the angle of the rotary shaft <NUM> is smaller than <NUM>°, the air is not discharged to the direction where the handle <NUM> is located.

Also, since the center of gravity G2 of the fan is close to the handle <NUM>, if the angle A of the rotary shaft with respect to the straight line V1 passing through the center of gravity of the particle separator is <NUM>°, the center of gravity of the cleaning appliance may move to the direction where the handle <NUM> is located. Therefore, the user may handle the cleaning appliance <NUM> by using a relatively small force.

Meanwhile, it is preferable that an angle of the second housing <NUM> inclined toward the handle with respect to a vertical line passing through the center of the first housing <NUM> is set to be equal to the angle A of the rotary shaft <NUM> inclined toward the straight line V1 (straight line orthogonal to the first cover) passing through the center of gravity of the particle separator.

However, it is preferable that the inclined angle A of the rotary shaft <NUM> with respect to the straight line V1 passing through the center of gravity of the particle separator is set to <NUM>° or more and <NUM>° or less. This is because that it is difficult to expect a big difference from the conventional cleaning appliance having an incline angle of <NUM>° if the inclined angle A is less than <NUM>° and it is difficult to expect a big difference from the conventional cleaning appliance having an incline angle of <NUM>° if the inclined angle A is <NUM>° or more.

<FIG> illustrates an example of a case that an inclined angle A of the rotary shaft <NUM> with respect to the straight line V1 passing through the center of gravity of the particle separator is set to <NUM>°. According to an experiment, in this case, it is evaluated that load felt by a user in handling of the cleaning appliance is the lowest.

As described above, the motor <NUM> provided in the fan may be provided to be supplied with a power through the battery <NUM> detachably provided in the housing <NUM>. In this case, the circumferential surface of the first housing <NUM> should be provided with a battery housing <NUM> for storing the battery <NUM>.

The battery housing <NUM> provided in the present invention is located at a point (spaced point of <NUM>°) located to be opposite to the point where the intake unit <NUM> is located, in the space provided by the circumferential surface of the first housing <NUM>. Also, the battery housing <NUM> is provided to be protruded toward a direction far away from the circumferential surface of the first housing <NUM>.

The battery <NUM> may detachably be inserted into the battery housing <NUM> through an insertion hole <NUM> (see <FIG>) provided to pass through a bottom surface of the battery housing <NUM> a side of the battery housing <NUM>.

In this case, one end of the handle <NUM> may be fixed to the circumferential surface of the second housing <NUM> and the other end of the handle <NUM> may be fixed to an upper surface of the battery housing <NUM>. That is, the handle <NUM> may include a bar shaped handle body <NUM> extended from the battery housing <NUM> toward the second housing <NUM> and a bar shaped connection body <NUM> connecting the handle body <NUM> to the circumferential surface of the second housing <NUM>.

The handle body <NUM> may be provided to have an inclined angle of <NUM>° to <NUM>° with respect to a reference line L1 passing through the center of the intake unit. <FIG> illustrates an example of a case that a straight line L2 passing through the center of the handle body <NUM> has an inclined angle of <NUM>° with respect to the reference line L1.

If a height of the battery housing <NUM> is increased, since a length of the handle body <NUM> may be reduced to cause inconvenience of a user, it is preferable that a length (length of Y-axis directional battery) of the battery <NUM> from the circumferential surface of the first housing <NUM> to a direction where the handle body <NUM> is located is set to be longer than a length (length of Z-axis directional battery) of the battery <NUM> with respect to a height direction of the first housing <NUM> and a length (length of X-axis directional battery) of the battery with respect to a diameter direction of the first housing <NUM>.

Moreover, it is preferable that the center of gravity G2 of the fan is located between the center of gravity G1 of the particle separator and the center of gravity G3 of the battery and the center of gravity G3 of the battery may be provided to be located between the center of gravity G2 of the fan and the center of gravity G4 of the handle <NUM>. This is to allow a user to handle the cleaning appliance by using a small force by arranging each of the centers of gravities G1, G2 and G3 to be closed to the center of gravity G4 of the handle.

Meanwhile, even though the center of gravity G2 of the fan is located between the center of gravity G1 of the particle separator and the center of gravity G3 of the battery and the center of gravity G3 of the battery is located between the center of gravity G2 of the fan and the center of gravity G4 of the handle, if the centers of gravities G1, G2 and G3 of the fan, the particle separator and the battery are located on one straight line, the center of gravity of the cleaning appliance will be far away from the handle <NUM>.

Therefore, it is preferable that the center of gravity G2 of the fan is located above the reference line L1 passing through the center of the intake unit <NUM> and the center of gravity G1 of the particle separator and the center of gravity G3 of the battery are located below the reference line L1 passing through the center of the intake unit.

However, the center of gravity G4 of the handle may be located on the reference line L1 passing through the center of the intake unit, or may be located below the reference line L1 passing through the center of the intake unit.

Claim 1:
A cleaning appliance comprising:
a housing (<NUM>) provided in a hollow cylinder shape, having an intake unit (<NUM>) and an exhaust unit (<NUM>);
a fan (<NUM>) provided to include an impeller (<NUM>) located in the housing (<NUM>), a rotary shaft (<NUM>) to which the impeller (<NUM>) is fixed, and a motor (<NUM>) rotating the rotary shaft (<NUM>), moving the air entering the housing (<NUM>) through the intake unit (<NUM>) to the exhaust unit (<NUM>);
a particle separator (<NUM>) provided inside the housing (<NUM>) to provide a path for guiding the air entering the intake unit (<NUM>) to the impeller (<NUM>), separating particles from the air by using a centrifugal force;
a battery housing (<NUM>) located at a point spaced apart from a point where the intake unit (<NUM>) is located, as much as <NUM>°, in a space provided by a circumferential surface of the housing (<NUM>) and protruded to be far away from the circumferential surface of the housing (<NUM>);
a battery (<NUM>) provided in the battery housing (<NUM>), supplying a power to the motor (<NUM>); and
a handle (<NUM>) provided to connect the circumferential surface of the housing (<NUM>) with the battery housing (<NUM>),
wherein the rotary shaft (<NUM>) is inclined at an angle (A) greater than <NUM>°and smaller than <NUM>°toward a direction where the handle (<NUM>) is located based on a vertical line (V1) passing through the center of gravity of the particle separator (<NUM>);
characterized in that the housing (<NUM>) includes:
a first housing (<NUM>) providing a space in which the particle separator (<NUM>) is stored, provided with the intake unit (<NUM>) on a circumferential surface;
a second housing (<NUM>) providing a space in which the fan (<NUM>) is stored, inclined from an upper end of the first housing (<NUM>) toward a direction where the handle (<NUM>) is located;
a first cover (<NUM>) provided to open or close a lower surface of the first housing (<NUM>); and
a second cover (<NUM>) provided to open or close an upper surface of the second housing (<NUM>) and provided with the exhaust unit (<NUM>).