JPH09119691A - Filter cleaning device in range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a filter of a range hood to be cleaned with a liquid detergent and further to enable oily smoke in the hood to be efficiently sucked. SOLUTION: An air discharging opening 6 formed at a top plate 4 of a hood 5 is communicated with a suction side of a blower 14 through an air passage 7. A filter 12 is fixed in the air passage 7. A liquid detergent dispersing trough 39 is arranged at an upper part of the filter 12. A cleaning liquid receptor pan 45 is arranged in the hood 5 and then a suction clearance 48 is formed between it and an inner surface of the hood 5. A cleaning liquid tank 52 is arranged below the cleaning liquid receptor pan 45 and the cleaning liquid in the cleaning liquid tank 52 is supplied to the liquid detergent dispersing trough 39 under an operation of a liquid pump 55 when the range hood is operated. With such an arrangement as above, since the cleaning liquid is circulated to flow along a surface of the filter 12 and then a film of cleaning liquid is formed, resulting in that an oily substance is hardly adhered to the surface of the filter 12, the adhered oily substance or the like can be cleaned with the cleaning liquid. In addition, even oily smoke expanded slightly to an outer area than an outer contour of the hood 5 is sucked into the hood 5, so that the oily smoke can be efficiently sucked.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for cleaning a filter in a range hood that sucks smoke, steam, odor, etc. generated during cooking and discharges it to the outside.

[0002]

2. Description of the Related Art A range hood is installed above a range and sucks smoke, steam, odor, etc. (hereinafter referred to as oil smoke) generated during cooking and discharges the smoke to the outside.

As an example of this range hood, a fan and a filter are attached to a hood that captures oil smoke, the oil smoke is sucked by driving the air blower, and the oil content of the sucked oil smoke is collected by the filter to reduce the oil content. With air,
It is known that the air is discharged to the outside through a discharge duct or the like.

[0004]

In the above range hood, oil or the like adheres to the filter, so the filter must be cleaned regularly. However, since the hood is attached to the upper position of the range, it is easy to forget to clean it, and when it is noticed, it is often that a long time has passed, and the dirt is stuck to the filter,
Cleaning the filter is very troublesome.

Therefore, it is an object of the present invention to provide a filter cleaning device for a range hood which can solve the above-mentioned problems.

[0006]

SUMMARY OF THE INVENTION The present invention is a hood 5 having a box-like shape with an open lower surface and an exhaust opening 6 on its upper surface.
A blower 14 attached to the upper portion of the hood 5, an air passage body 7 that connects the suction port of the blower 14 to the exhaust opening 6 of the hood 5, and a filter 12 attached to the air passage body 7. A cleaning liquid spraying gutter 39 for supplying the cleaning liquid to the upper part of the filter 12, a cleaning liquid receiving tray 45 mounted in the hood 5 for receiving the cleaning liquid flowing along the filter 12 and dropping from the exhaust opening 6, and a cleaning liquid tank 52 and a liquid pump 55 that supplies the cleaning liquid in the cleaning liquid tank 52 to the cleaning liquid spray gutter 39, and the cleaning liquid receiving tray 45 has a substantially similar shape slightly smaller than the inner surface shape of the hood 5, and the end surface of the cleaning liquid receiving tray 45. And a suction gap 48 is formed between the inner surface of the hood 5 and the inner surface of the hood 5.

[0007]

[Operation] According to the present invention, the cleaning liquid flowing along the filter 12 prevents oil and the like in the oil smoke from adhering to and remaining on the surface of the filter 12, so that the filter 12 can be cleaned without manual labor. Also, filter 1
The cleaning liquid flowing along 2 drops from the exhaust opening 6 on the upper surface of the hood 5, and the falling cleaning liquid is the cleaning liquid receiving tray 4
5, the cleaning liquid does not drop below the hood 5, so that the lower part of the range hood 5 is not contaminated with the cleaning liquid. Further, the cleaning liquid tray 45 has a substantially similar shape which is slightly smaller than the shape of the inner surface of the hood 5, and closes the central portion of the lower surface opening of the hood 5 to form a suction gap 48 between the inner surface of the hood 5 and The suction gap 48
The oil smoke is further sucked into the hood 5, and the wind speed thereof is remarkably increased. Therefore, when the blower 14 is driven, air is sucked from the suction gap 48 along the cleaning liquid receiving tray 45, and the air is sufficiently sucked from the outer side portion than the outer portion of the hood 5, so that it spreads slightly outward from the outer portion of the hood 5. Oil smoke can also be sucked in, and oil smoke generated during cooking can be efficiently sucked into the hood 5.

[0008]

[Examples] As shown in FIGS. 1 and 2, a front plate 1 and a back plate 2 facing each other and a pair of side plates 3 and a top plate 4 facing each other.
The box-shaped hood 5 has an open bottom surface. An exhaust opening 6 is formed in the center of the top plate 4 of the hood 5.

An air passage body 7 is attached along the opening edge of the exhaust opening 6 on the top surface of the top plate 4. This air passage body 7
Has a box-like shape whose lower surface is opened by a pair of side plates 10, 10 facing a back plate 9 which is substantially vertical and a back plate 9 which is substantially vertical. The flange 8a of the front plate 8, the flange 9a of the rear plate 9, and the flange 10a of the side plate 10 are attached by screws 11 along the opening edge of the exhaust opening 6 of the top plate 4.

A filter 12 is mounted inside the air passage body 7, and the filter 12 divides the air passage body 7 into a suction side portion 7a and a discharge side portion 7b. The back plate 9 of the air passage body 7 is formed with a suction port 13 opening to the discharge side portion 7b.

The back plate 9 of the air duct body 7 has a suction port 13
A blower 14 is attached to suck and discharge air from the air. The blower 14 has a fan 15 such as a sirocco fan rotatably provided in a housing 15, and an electric motor 17 is attached to the housing 15.
The flange 15a of No. 5 is attached to the back plate 9 with screws 18. A duct joint 20 for mounting a discharge duct is attached to the opening edge of the discharge portion 19 of the housing 15 with a screw 21.

As shown in FIGS. 1 and 3, the filter 12 is formed by bending an upper edge portion, a lower edge portion, and left and right vertical edge portions of a rectangular plate 30 into flanges 31, which are arranged in the left and right directions of the plate 30. A plurality of slit-shaped holes 32 and fins 33 are formed by punching a plurality of spaced-apart locations at intervals in the vertical direction. The fin piece 33 is formed on the rear surface 30 of the plate 30.
It projects to a. A plurality of drain holes 34 are formed in the lower flange 31. A plurality of vertical recessed grooves 35 continuous to the upper flange 31 are formed in the front surface 30b of the plate 30 toward the upper flange 31 at intervals in the left-right direction.

An upper filter mounting bracket 36 is attached to the front plate 8 of the air passage body 7. The upper filter mounting bracket 36 includes a connecting piece 37 and a mounting piece 38.
Is a long member that is substantially V-shaped and extends between the left and right side plates 10. The connecting piece 37 is fixed to the inner surface of the front plate 8, and the mounting piece 38 is inclined so that the lower end portion is on the rear side with respect to the vertical.

A cleaning liquid spray gutter 39 is attached to the front plate 8 of the air passage body 7 so as to face the upper filter mounting bracket 36. This cleaning liquid spray gutter 39 is a filter 12
Of the cleaning liquid drop holes 40 are formed in the bottom portion 39a at intervals in the longitudinal direction.
A pressing piece 41 is integrally provided on the lower surface of the. The holding piece 41 opposes the rear side surface 38a of the mounting piece 38 at a distance from each other, and forms a downward recess 42 between them.
Is the upper filter mounting part.

A lower filter mounting bracket 43 is mounted below the suction port 13 in the back plate 9 of the air passage body 7, and the lower filter mounting bracket 4 is mounted on the lower filter mounting bracket 43.
3 has an obliquely upward recess 44, and a large number of holes 44a are formed in the bottom surface of the recess 44.

To mount the filter 12, first, hold the knob 12a attached to the lower part of the filter 12 and fit the upper part into the recess 42, and in that state, the filter 12
The lower part of the filter is moved rearward to face the concave portion 44 of the lower filter mounting bracket 43, and then the filter 12 is lowered to fit the lower portion into the concave portion 44.

Because of this, the filter 12 is inserted by putting a hand through the exhaust opening 6 of the hood 5 and holding the knob 12a.
Can be easily installed and removed.

As shown in FIG. 1, a cleaning liquid tray 45 is attached to the inside of the hood 5 via a front bracket 46 and a back bracket 47. The planar shape of the cleaning liquid receiving tray 45 is a little similar to the inner surface shape of the hood 5, and closes the central portion of the lower surface opening of the hood 5, so that each end surface of the cleaning liquid receiving tray 5 and the inner surface of the front plate 1 of the hood 5, A suction gap 48 (about 5 cm) is formed between the inner surface of the rear plate 2 and the inner surfaces of the pair of side plates 3 (the inner surface of the hood 5).

As shown in FIGS. 3 and 4, the bottom portion 45a of the cleaning liquid receiving tray 45 is inclined toward the front-rear direction intermediate portion and the left-right direction intermediate portion, and the bottom portion 45a is substantially in the shape of a platter. A discharge port 49 is formed in the longitudinally intermediate portion of the bottom portion 45a in the front-rear direction.

A mounting hole 50 is formed in the bottom portion 45a of the cleaning liquid tray 45 near the front portion. The mounting hole 50 includes a large diameter circular portion 50a and a groove portion 50b. A mounting screw 5 is attached to the lower horizontal piece 46a of the front bracket 46.
1 is screwed, and the rear bracket 46 has a recess 47.
a.

The cleaning liquid receiving tray 45 has the large-diameter circular portion 50a of the mounting hole 50 inserted into the head portion 51a of the mounting screw 51 and abuts the lower horizontal piece 46a, and in that state, moves to the rear side. Fit the rear edge into the recess 47a of the rear bracket 47,
Further, the groove portion 51b is inserted into the mounting screw 51, and the mounting screw 51 is tightened and mounted. (See Figures 3 and 4)

Because of this, the cleaning liquid tray 45 can be easily attached to or detached from the inside of the hood 5.

A cleaning liquid tank 52 is provided on the lower surface of the cleaning liquid tray 45.
Are attached by a pair of brackets 53. The cleaning liquid tank 52 is a box-shaped body having an opening at the top made of a transparent or semi-transparent material in its entirety or at the front or bottom thereof, and the cleaning liquid inside can be seen from the outside. Cleaning liquid tank 5
Flanges 54 are integrally provided on the left and right upper edge portions of 2.
The cleaning liquid tank 52 is mounted so that its flange 54 is placed on the horizontal piece 53 a of the bracket 53 and is suspended from the cleaning liquid tray 45.

Because of this, the cleaning liquid dropped from the drain port 49 of the cleaning liquid receiving tray 45 flows into the cleaning liquid tank 52. Further, the cleaning liquid tank 52 has the flange 54 and the bracket 5
It can be attached and detached by moving it in the front-back direction along the horizontal piece 53a of No. 3, visually judging the amount of the cleaning liquid or the contamination of the cleaning liquid from the outside, and removing it when necessary to replenish the cleaning liquid, It can be cleaned.

A liquid pump 55 is attached to the lower part of the back plate 9 of the air passage body 7. The suction side of the liquid pump 55 communicates with a strainer 57 in the cleaning liquid tank 52 via a suction tube 56. A discharge tube 58 communicates with the cleaning liquid spray gutter 39 on the discharge side of the liquid pump 55. The suction tube 56 is flexible so that it can be bent freely when the cleaning liquid tank 52 is attached or detached.

Next, cleaning (washing) of the filter 12 will be described. Liquid pump 55 with range hood operation
Drive. As a result, the cleaning liquid in the cleaning liquid tank 52 is supplied to the cleaning liquid spraying gutter 39 by the liquid pump 55. The cleaning liquid in the cleaning liquid spraying gutter 39 falls on the filter 12 through the cleaning liquid drop hole 40.

This cleaning liquid is applied to the surface of the filter 12 (plate 3
0 front face 30b) and its filter 1
A film of the cleaning liquid is formed on the surface of 2. This makes it difficult for the oil in the sucked air to directly adhere to the surface of the filter 11, is collected by the coating film of the cleaning liquid, and flows down together with the cleaning liquid.
A small amount of oil adhering to the surface of the filter 12 is washed by the washing liquid flowing down along the surface of the filter 12. The cleaning liquid that has flowed down along the surface of the filter 12 is washed through the exhaust opening 6 formed in the top plate 4 of the hood 5 and the cleaning liquid receiving tray 45.
To fall. On the other hand, the cleaning liquid that has flowed down along the back surface of the filter 12 (the rear surface 30a of the plate 30) has a lower flange 3
1 drainage hole 34, lower filter mounting bracket 4
It falls from the hole 44a of No. 3 to the cleaning liquid tray 45. The cleaning liquid dropped on the cleaning liquid receiving tray 45 is supplied from the drain port 49 to the cleaning liquid tank 52.
It flows down inside and is collected.

By repeating the above operation, the filter 1
2 can be cleaned with a cleaning liquid without manual labor.

Further, a vertical groove 35 is formed near the upper portion of the plate 30 of the filter 12, and the vertical groove 35 forms a contact portion between the mounting piece 38 of the upper filter mounting bracket 36 and the upper portion of the filter 12. A void is formed.
As a result, the cleaning liquid that has dropped onto the upper portion of the filter 12 flows smoothly from the voids to the front surface 30b of the plate 30, so that the cleaning liquid flows smoothly along the surface of the filter 12. It should be noted that a protrusion may be provided near the upper portion of the plate 30 of the filter 12, or a vertical groove or a protrusion may be provided on the rear side surface 38a of the mounting piece 38 to form the above-mentioned void.

Further, since the filter 12 is positioned within the width of the cleaning liquid receiving tray 45 in the front-rear direction, the cleaning liquid receiving tray 45 can receive the cleaning liquid which does not flow along the filter 12 but becomes a water drop and drops from the filter 11. .

Cleaning liquid drop hole 40 of the cleaning liquid spraying tank 39
If the diameter is small, the cleaning liquid will not drop due to the surface tension, and if the diameter is large, a large amount of the cleaning liquid will fall and hit the upper part of the filter 12 to be scattered around. For this reason, the diameter of the cleaning liquid drop hole 40 is set to a value at which an appropriate amount of the cleaning liquid drops due to the viscosity of the cleaning liquid. For example, the range is 2 to 4 mm.

The surface of the plate 30 of the filter 12 may be subjected to hydrophilic treatment. As a result, the cleaning liquid flows while conforming to the surface of the plate 30, so that the cleaning liquid flows over the entire surface of the plate 30 and a coating film of the cleaning liquid is easily formed over the entire surface of the filter 12.

Further, the exhaust opening 6 formed on the top plate 4 of the hood 5 has a downward folding piece 6a at the opening edge. This folded piece 6a serves as a drainer, and the filter 1
The cleaning liquid that has flown down along 2 drops downward by the folded-back piece 6a. As a result, the cleaning liquid flowing down along the filter 12 does not flow along the inner surface of the top plate 4, and the cleaning liquid surely drops on the cleaning liquid receiving tray 45.

Further, the cleaning liquid tray 45 has a substantially similar shape which is slightly smaller than the inner surface shape of the hood 5, and closes the central portion of the lower surface opening of the hood 5, and the space between the end surface of the cleaning liquid tray 45 and the inner surface of the hood 5. Since the suction gap 48 is formed, the air sucked by the blower 14 is sucked into the hood 5 along the cleaning liquid tray 45 through the suction gap 48. Since the area of the suction gap 48 is significantly narrower than the lower surface opening of the hood 5, the wind velocity of the air passing through the suction gap 48 is significantly higher than the wind velocity of the air passing through the entire lower surface opening of the hood 5. For example, it is about 10 times faster.

As a result, when the blower 14 is driven, the air is sufficiently sucked from the outer portion of the hood 5 than the outer portion of the hood 5, so that the oil smoke spread slightly outside the outer portion of the hood 5 can also be sucked in, and is generated during cooking. The oil smoke can be efficiently sucked into the hood 5.

Further, since the bottom portion 45a of the cleaning liquid receiving tray 45 is slanted toward the front-rear intermediate portion and the left-right intermediate portion, and has a substantially rustle shape, the oil smoke generated during cooking is the bottom portion 45a of the cleaning liquid receiving tray 45. Along the hood 5
Smoothly flows into the outer shape of the hood 5, and is efficiently sucked into the hood 5 through the suction gap 48 as described above, and the oil smoke is cooled to some extent by the cleaning liquid flowing along the cleaning liquid receiving tray 45, and thus is discharged from the discharge duct. Air temperature drops.

Next, a control device for controlling the operation of the liquid pump 55 will be described. As shown in FIG. 5, the liquid pump 55 is rotationally driven by the electric motor 60, and the electric motor 60 is controlled by the controller 61.
The energization is controlled by. The controller 61 includes a blower 1
The operation signal and the stop signal of the range hood are input from the switch 63 that activates the electric motor 17 of No. 4. The cleaning liquid spray gutter 39 is provided with a first liquid level detection sensor 64 and a second liquid level sensor 65.

The first liquid level detection sensor 64 outputs a signal when the liquid level in the cleaning liquid spray gutter 39 is equal to or higher than the set high liquid level, and the second liquid level detection sensor 65 outputs the low liquid level set by the liquid level. Outputs a signal when it is above the surface. These signals are sent to the controller 61.

Next, the operation will be described. Switch 63 ON
Then, the electric motor 17 is driven to operate the blower 14. This brings the range hood into an operating state.
When the switch 63 is turned on, the operation signal is sent to the controller 61.
Is input to The controller 61 outputs a low speed drive command to the control circuit 62, and a small current is supplied to the electric motor 60 to rotate at a low speed. As a result, the discharge amount of the liquid pump 55 per unit time becomes small, and the amount of cleaning liquid supplied to the cleaning liquid spraying gutter 39 becomes small. The supply amount of the cleaning liquid is set to be larger than the falling amount of the cleaning liquid falling from each cleaning liquid drop hole 40.

That is, since the discharge amount per one rotation of the liquid pump 55 is constant, the discharge amount per unit time becomes small if the liquid pump 55 is rotated at a low speed.

As a result, the cleaning liquid is accumulated in the cleaning liquid spraying gutter 39, and when the liquid level reaches the set low liquid level, the second liquid level sensor 65 is turned on. This ON signal is sent to the controller 61, and the controller 61 outputs a stop command to the control circuit 62. The power supply to the electric motor 60 is stopped, the electric motor 60 is stopped, and the liquid pump 55 is stopped, so that the cleaning liquid is not supplied to the cleaning liquid spray gutter 39.

When the liquid level of the cleaning liquid spray gutter 39 becomes lower than the set low liquid level, the second liquid level sensor 65 is turned off. This OFF signal is sent to the controller 61, and the controller 61 commands the control circuit 62 to drive at a low speed.

By repeating this operation, the cleaning liquid spraying gutter 3
The liquid level of No. 9 is maintained at the set low liquid level height. For this reason, the amount of the cleaning liquid dropped on the filter 12 is such that the cleaning liquid flowing along the filter 12 is
The amount is small enough not to enter the discharge side portion 7b of the air duct body 7 due to the flow of air passing through.

The switch 63 is turned off and the electric motor 17
To stop the blower 14. As a result, the range hood is stopped. Switch 63 to O
When the FF is performed, a stop signal is input to the controller 61.
The controller 61 outputs a high speed drive command to the control circuit 62, and a large current is supplied to the electric motor 60 to rotate at high speed. As a result, the discharge amount of the liquid pump 55 per unit time becomes large, and the amount of the cleaning liquid supplied to the cleaning liquid spray gutter 39 becomes a large flow rate.

As a result, the cleaning liquid is accumulated in the cleaning liquid spray gutter 39, and when the liquid level reaches the set high liquid level, the first liquid level sensor 64 is turned on. This ON signal is sent to the controller 61, and the controller 61 outputs a stop command to the control circuit 62. The power supply to the electric motor 60 is stopped, the electric motor 60 is stopped, and the liquid pump 55 is stopped, so that the cleaning liquid is not supplied to the cleaning liquid spray gutter 39.

When the liquid level of the cleaning liquid spray gutter 39 becomes lower than the set high liquid level, the first liquid level sensor 64 is turned off. This OFF signal is sent to the controller 61, and the controller 61 commands the control circuit 62 to drive at high speed.

By repeating this operation, the cleaning liquid spraying gutter 3
The liquid level of No. 9 is maintained at the set high liquid level. For this reason, the amount of the cleaning liquid dropped on the filter 12 is large enough to clean the oil remaining on the surface of the filter 12 and the steam.

Then, when a predetermined time, for example, 15 to 30 minutes has elapsed after the stop signal was input to the controller 61, the controller 61 outputs a stop command to the control circuit 62 to stop the electric motor 60 and the liquid pump 55. Since the cleaning liquid is not supplied to the cleaning liquid spraying gutter 39 and all the cleaning liquid accumulated in the cleaning liquid spraying gutter 39 falls, the cleaning of the filter 12 is completed. The above is shown in a flowchart as shown in FIG.

By controlling as described above, a small amount of cleaning liquid is dropped and supplied to the filter 12 during the operation of the range hood. For this reason, the filter 1 is used while operating the range hood.
The filter 1 while preventing the cleaning liquid from entering the discharge side portion 7b of the air duct body 7 by the flow of air passing through the filter 1
2 can be washed to some extent.

After stopping the range hood, a large amount of cleaning liquid is supplied to the filter 12 for a predetermined time. Therefore, the oil and water vapor remaining on the filter 12 can be flowed off.

Further, since the liquid level in the cleaning liquid spray gutter 39 is maintained at the set low liquid level or the set high liquid level, the cleaning liquid will not overflow from the cleaning liquid spray gutter 39. The cleaning liquid never runs out.

Next, a second embodiment of the control device for the liquid pump 55 will be described. As shown in FIG. 7, the liquid pump 55 is rotationally driven by an electric motor 60, and the electric motor 60 is energized by a control circuit 62 controlled by a controller 61. A stop signal for the range hood is input to the controller 61 from a switch 63 that activates the electric motor 17 of the blower 14.

When a stop signal is input from the switch 63, the controller 61 has a predetermined time, for example, 15 minutes to 30 minutes.
A drive command is output to the control circuit 62 by the amount.

In this way, after the range hood is stopped from the operating state, a large amount of cleaning liquid such as oil and water vapor adhering to the surface of the filter 12 flows down along the surface of the filter 12 for a predetermined time. 12
The surface of the can be washed with a washing liquid. This allows
Since the cleaning liquid does not flow along the filter 12 during the operation of the range hood, the cleaning liquid never flows into the discharge side portion 7b of the air duct body 7 by the flow of the air sucked by the blower 14.

Next, another embodiment will be described. Cleaning liquid saucer 4
5 and the cleaning liquid tank 52 are placed separately, and the cleaning liquid in the cleaning liquid tray 45 is sent to the cleaning liquid tank 52. The cleaning liquid collected by the cleaning liquid receiving tray 45 is drained to the drainage section of the sink using a tube or the like.

[0056]

According to the first aspect of the present invention, the cleaning liquid flowing along the filter 12 prevents the oil in the oil smoke from adhering to and remaining on the surface of the filter 12, so that the filter 12 can be cleaned without manual labor. . Further, the cleaning liquid flowing along the filter 12 drops from the exhaust opening 6 on the upper surface of the hood 5, but the falling cleaning liquid is received by the cleaning liquid tray 45, and the cleaning liquid does not drop below the hood 5. The lower part of the hood 5 is not contaminated with the cleaning liquid. Further, the cleaning liquid tray 45 has a substantially similar shape which is slightly smaller than the shape of the inner surface of the hood 5, and closes the central portion of the lower surface opening of the hood 5 to form a suction gap 48 between the inner surface of the hood 5 and Oil smoke is sucked into the hood 5 through the suction gap 48, and the wind speed thereof is remarkably increased. Therefore, when the blower 14 is driven, the air is sufficiently sucked from the outer side of the outer shell of the hood 5, so that the oil smoke spread slightly outside the outer shell of the hood 5 can also be sucked in, and the oil smoke generated during cooking can be efficiently consumed by the hood. 5 can be sucked into.

According to the second aspect of the present invention, the washing liquid flows along the filter 12 during the operation of the range hood to form a film of the washing liquid on the surface of the filter 12. The oil collected by the coating and flowing down together with the cleaning liquid, and passing through the coating of the cleaning liquid and adhering to the filter is washed by the cleaning liquid flowing down along the filter 12. This allows the filter 12 to be cleaned without manual labor.

According to the third aspect of the invention, since the cleaning liquid flows down along the surface of the filter 12 for a certain period of time after the range hood is stopped, the oil content adhering to the surface of the filter 12 can be washed away with the cleaning liquid. As a result, the filter 12 can be cleaned without manual labor, and the cleaning liquid does not pass through the filter 12 and enter the blower 14 side.

According to the fourth aspect, since a small amount of cleaning liquid flows along the filter 12 during the operation of the range hood, the cleaning liquid passes through the filter 12 by the flow of air passing through the filter 12 and the blower 14 side. It is possible to clean the filter 12 to some extent while preventing it from penetrating into. Moreover, since a large amount of cleaning liquid flows down along the filter 12 for a predetermined time after the range hood is stopped, the oil and the like remaining on the filter 12 can be reliably cleaned.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a range hood showing an embodiment of the present invention.

FIG. 2 is a perspective view of the range hood as viewed from above.

FIG. 3 is an exploded perspective view of a filter mounting portion.

FIG. 4 is a perspective view of the range hood as seen from below.

FIG. 5 is an explanatory diagram showing a first embodiment of the control device.

FIG. 6 is a flowchart showing a control operation.

FIG. 7 is an explanatory diagram showing a second embodiment of the control device.

[Explanation of symbols]

4 ... Top plate, 5 ... Hood, 6 ... Exhaust opening, 7 ... Air passage body,
Reference numeral 12 ... Filter, 14 ... Blower, 39 ... Cleaning liquid spray gutter, 40 ... Cleaning liquid drop hole, 45 ... Cleaning liquid receiving tray, 40 ... Discharge port, 48 ... Suction gap, 52 ... Cleaning liquid tank, 55 ... Liquid pump.

Claims (4)

[Claims] 1. A hood 5 having a box-like shape with an opened lower surface and an exhaust opening 6 on its upper surface, a blower 14 attached to the upper portion of the hood 5, a suction port of the blower 14 and an exhaust of the hood 5. An air passage body 7 communicating with the opening 6 for use, a filter 12 mounted in the air passage body 7, a cleaning liquid spray gutter 39 for supplying a cleaning liquid to the upper part of the filter 12, and a cleaning liquid spray gutter 39 mounted in the hood 5. A cleaning liquid receiving tray 45 for receiving the cleaning liquid flowing along the filter 12 and falling from the exhaust opening 6, a cleaning liquid tank 52, and a liquid pump 55 for supplying the cleaning liquid in the cleaning liquid tank 52 to the cleaning liquid spraying gutter 39, The cleaning liquid receiving tray 45 has a substantially similar shape which is slightly smaller than the inner surface shape of the hood 5, and the suction gap 48 is formed between the end surface of the cleaning liquid receiving tray 45 and the inner surface of the hood 5. Filter cleaning device in range hood to symptoms. 2. The liquid pump 55 is configured to be driven during operation of a range hood.
Filter cleaning device in the range hood described. 3. The filter cleaning device for a range hood according to claim 1, wherein the liquid pump 55 is configured to be driven for a certain period of time after the range hood is stopped. 4. A means for switching the supply amount of the cleaning liquid to the filter 12 between a small amount and a large amount, a means for detecting a range hood operation and a stop of the range hood, and a switching means for changing the cleaning liquid supply amount by detecting the range hood operation. 2. The range hood according to claim 1, wherein the switching means is configured to switch the cleaning liquid supply amount to a large amount by switching to a small amount and to detect the stop of the range hood, and to stop the liquid pump 55 after a predetermined time. Filter cleaning device.