JPH11216321A - Filter cleaner of range hood - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a remaining cleaning liquid stuck to a vent hole of a filter by a method wherein a cleaning means of removing an oil content, etc., stuck to the filter in a range hood by supplying the cleaning liquid thereto is provided, and a blower is driven for a specific time after stopping the supply of the cleaning liquid of the cleaning means. SOLUTION: In a range hood wherein a smoke or the like generated in cooking is collected to be exhausted outside, an electrically driven motor 12 for a pump is driven for a specific time after ending of blast and ventilation for the range hood. Then, cleaning liquid in a cleaning liquid gutter 34 is supplied by dropping to an upper edge part of a filter 21 from a water emission nozzle 31 of a washing liquid gutter 30. Then, the supplied cleaning liquid flows down along the filter surface 21, and cleans the filter surface by washing away the oil content, etc., stuck to the filter 21. Then, after a set time has elapsed, the electrically driven motor for the pump is stopped. Since a blower 11 is gradually largely rotated with the electrically driven motor for the blower 12, the cleaning liquid remaining by being stuck to the vent hole of the filter 21 is eliminated.

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 which collects smoke, steam, odor and the like generated during cooking and discharges it to the outside.

[0002]

2. Description of the Related Art As a range hood, a filter having a large number of small ventilation holes is mounted inside a hood body, and a suction part and a discharge part are formed inside the hood body with a filter as a boundary, and a blower is mounted at the discharge part. Are known.

With this range hood, air can be sucked in from a suction part by driving a blower, the sucked air can be sucked into a discharge part through a vent hole of a filter, and can be discharged outside through an exhaust duct or the like. Also,
Oil and water vapor in the air generated during cooking can be collected by the filter, and the amount of oil and water vapor in the air flowing through the discharge duct is significantly reduced, so that oil and water vapor condenses in the discharge duct and flows out from the discharge duct. Nothing.

In the above-described range hood, since oil and the like adhere to the filter, the washing liquid flows down along the filter surface to wash the oil and the like, or the cleaning liquid is sprayed onto the filter surface to wash the oil. Various filter cleaning devices have been proposed.

[0005]

In the above-described filter cleaning device, since the cleaning liquid flows down or is sprayed along the filter surface after the blower is stopped, a phenomenon in which the cleaning liquid film is formed on the small ventilation holes of the filter after cleaning. Is generated, and the film of the cleaning liquid remains even after the cleaning is completed. The remaining cleaning liquid film is caught by the cleaning liquid on the filter surface, and a large amount of the cleaning liquid remains on the filter surface. This cleaning liquid evaporates when left for a long period of time and accumulates as steam inside the hood body, which may cause rust inside the hood body or cause an electric short circuit due to dew condensation on the charged part of the electric component.

[0006] Also, it flows down along the filter surface,
In the case of a circulation type cleaning device that collects the sprayed cleaning liquid in the cleaning liquid tank and reuses it, the large amount of cleaning liquid remaining on the filter surface due to the film adhering to the above-mentioned vents is completely evaporated. Cannot be collected in tank. The large-area filter used in the range hood has a very large amount of evaporation, which causes the amount of cleaning liquid in the cleaning liquid tank to be reduced at an early stage. The cleaning liquid must be replenished frequently, which increases the user's labor.

It is considered that the filter vibrates violently in order to break the film of the cleaning liquid adhering to the ventilation hole of the above-mentioned filter. However, vibrating the filter violently requires a very large structure and a high manufacturing cost. It will be expensive.

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

[0009]

According to a first aspect of the present invention, a filter 21 having a large number of small ventilation holes and a blower 6 are provided in a hood 1, and the air in the hood 1 is passed through the filter 21 by the blower 6. In a range hood that sucks and discharges air through a pore, a cleaning unit that supplies a cleaning liquid to the filter 21 to remove oil and the like adhering thereto, and a driving unit that drives the blower 6 for a predetermined time after the cleaning liquid supply of the cleaning unit is stopped. A range hood filter cleaning device, characterized in that:

According to a second aspect of the present invention, there is provided a filter cleaning device for a range hood, wherein the driving means according to the first aspect of the present invention is activated when a predetermined pause time elapses after the supply of the cleaning liquid is stopped.

A third invention is a filter cleaning device for a range hood, wherein the driving means in the first or second invention gradually increases the blowing capacity of the blower 6.

A fourth aspect of the present invention is a filter cleaning device for a range hood, wherein the driving means in the first or second aspect of the invention increases the blowing capacity of the blower 6 stepwise.

A fifth aspect of the present invention is a filter cleaning device for a range hood, wherein the driving means in the first or second aspect of the present invention intermittently increases the blowing capacity of the blower 6 intermittently.

[0014]

According to the first aspect of the present invention, the blower 6 is driven for a predetermined time after the cleaning of the filter 21 is completed, and the film of the cleaning liquid adhering to the ventilation hole of the filter 21 is reliably broken by the air passing through the ventilation hole. The cleaning solution caught on the film of the cleaning solution does not remain on the filter surface.

Accordingly, the amount of evaporation of the cleaning liquid is remarkably reduced, so that the amount of steam trapped in the hood 1 is almost eliminated, no rust is generated inside the hood 1, and electric power due to condensation on the charged portion of the electric component is prevented. No short circuit occurs.

In the case of the circulation type cleaning apparatus, the cleaning liquid hardly remains on the filter surface and almost all of the cleaning liquid supplied to the filter surface is recovered in the cleaning liquid tank. In addition, the interval between replenishment of the cleaning liquid into the cleaning liquid tank becomes longer, so that the user is not required to work.

Moreover, only the blower 6 is driven after washing is completed, and the blower drive circuit of the conventional range hood provided with the washing device may be remodeled, and a special mechanism such as applying filter vibration is not required. The production cost is low.

According to the second invention, the blower 6 is driven for a predetermined time after the elapse of a predetermined pause time after the end of the filter cleaning. Therefore, after most of the cleaning liquid supplied to the filter 21 flows down, air is blown into the vent hole. Since it is distributed, the cleaning liquid is not sucked into the blower 6.

According to the third aspect of the present invention, since the blower 6 is driven with the blowing capacity gradually increased after the completion of the washing, the amount of air flowing through the ventilation hole of the filter 21 gradually increases and adheres to the ventilation hole. After the film of the cleaning liquid is broken, the cleaning liquid flows down along the filter 21 and is not sucked into the blower 6 from the vent hole, so that the film of the cleaning liquid can be reliably broken.

According to the fourth aspect of the present invention, since the blower 6 is driven with the blowing capacity gradually increased after the completion of the washing, the amount of air flowing through the ventilation hole of the filter 21 increases stepwise. As in the case of the invention, the cleaning liquid of the torn cleaning liquid film is not sucked into the blower 6.

According to the fifth aspect of the present invention, the blower 6 is driven with the blowing capacity intermittently and gradually increased after the completion of the washing, so that the amount of air flowing through the ventilation hole of the filter 21 is gradually and intermittently increased. That is, similarly to the above-described third aspect of the present invention, the cleaning liquid of the broken cleaning liquid film is not sucked into the blower 6.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a hood body 1 is formed in a box shape with a lower surface opened by a top plate 2, a rear plate 3, a front plate 4, and left and right side plates 5. A blower 6 is detachably mounted near the rear plate 3 of the top plate 2. A filter unit 7 is detachably attached to the front of the blower 6.
A water receiving plate 8 is detachably mounted substantially horizontally below and below the blower 6 and the filter unit 7.

The blower 6 has a fan 11, for example, a sirocco fan rotatably provided in a blower case 10, and an electric motor 1 for the blower mounted on a rear surface 10 a of the blower case 10.
2 is attached. A suction port 13 is formed in the front surface 10b of the blower case 10, and a discharge port 14 is open at the top.

The filter unit 7 includes the housing 2
The filter 21 is attached to the zero. The housing 2
Reference numeral 0 denotes a front plate 22, a rear plate 23, left and right side plates 24, a lower plate 25, and an upper plate 26. The front plate 22 has a filter mounting opening 27 formed therein, and the rear plate 23 has a large-diameter hole 28.
Is formed, and a cylindrical air guide plate 29 called a bell mouth is provided integrally with the periphery of the large-diameter hole 28.

A cleaning liquid gutter 30 is mounted near the upper part of the housing 20. The bottom plate 30a is bent in a step shape, and a plurality of water injection nozzles 31 are formed near the front part thereof at intervals in the left-right direction (width direction).

The lower part of the housing 20, ie, the lower plate 25, the lower part of the front plate 22, the lower part of the rear plate 23, and the side plate 2
4 to form a washing liquid receiving tray 32,
Is connected to a pipe 33.

The filter 21 has a large number of small air holes, and is mounted in the housing 20 so as to close the filter mounting opening 27. The cleaning liquid in the cleaning liquid gutter 30 flows from the water injection nozzle 31 along the filter 21. It flows down and accumulates in the washing liquid receiving tray 32. The cleaning liquid stored in the cleaning liquid receiving tray 32 flows through the pipe 33 into the cleaning liquid tank 34 attached to the water receiving plate 8. The cleaning liquid in the cleaning liquid tank 34 is supplied into the cleaning liquid gutter 30 via the pipe 36 by the cleaning liquid supply pump 35. Thus, a circulation type cleaning apparatus is formed.

An operation panel 40 is attached to the front plate 4 of the hood 1. The operation panel 40 includes a run button 41 and a stop button 42 as shown in FIG. When the operation button 41 is turned on, an operation signal is input to the controller 43, and the controller 43 drives the electric motor 12 for the blower. When the stop button 42 is turned on, the controller 43
And the controller 43 stops the electric motor 12 for the blower. The controller 43 starts driving the pump electric motor 37 of the cleaning liquid supply pump 35 after a lapse of the time set by the first timer 44 after the input of the stop signal. The motor 37 is stopped. After the pump electric motor 37 stops, after the time set by the third timer 46 elapses, the blower electric motor 12 is driven by gradually increasing the amount of energization, and stops after the set time of the fourth timer 47 elapses.

Next, the operation will be described. When the stop button 42 is turned on, the electric motor 12 for the blower is stopped, and the ventilation ventilation of the range hood ends. Thereafter, when the time set by the first timer 44 elapses, the pump electric motor 37 is driven for the time set by the second timer 45, and the cleaning liquid in the cleaning liquid gutter 34 is passed through the pipe 36 by the cleaning liquid supply pump 35 into the cleaning liquid gutter 30. To supply. The cleaning liquid in the cleaning liquid gutter 30 is dropped from the water injection nozzle 31 to the upper edge of the filter 21 and supplied.
The oil and the like flowing down along the surface of the filter 21 and adhering to the filter 21 are washed away.

When the time set by the second timer 45 elapses, the pump electric motor 37 stops. When the time set by the third timer 46 elapses after the pump electric motor 37 stops, the electric power for the blower electric motor 12 is gradually increased, and the blower 16 is driven by gradually increasing the blowing capacity, It stops after the set time of the fourth timer 47 has elapsed.

As described above, by driving the blower 6 for a predetermined time after the completion of the washing of the filter 21, the filter 21 is driven.
The film of the cleaning liquid adhering to the air hole of the above is reliably broken by the air passing through the air hole, and the cleaning liquid caught by the film of the cleaning liquid does not remain on the filter surface.

Accordingly, since the amount of evaporation of the cleaning liquid is remarkably reduced, the amount of steam trapped in the hood 1 is almost eliminated, no rust is generated inside the hood 1, and electric power due to dew condensation on the charged part of the electric component is eliminated. No short circuit occurs.

Also, since almost all of the cleaning liquid supplied to the filter surface is recovered in the cleaning liquid tank 34, in the case of a circulating cleaning apparatus, the cleaning liquid replenishment interval into the cleaning liquid tank 34 becomes longer, and the user's time is increased. It does not take time and effort.

In addition, since only the drive of the electric motor 12 for the blower and the electric motor 37 for the pump are controlled, no special mechanism such as the application of filter vibration is required, so that the production cost is low.

After the pump electric motor 37 is stopped, the set time of the third timer 46 (for example, 3 to 10 seconds)
Later, the electric motor 12 for the blower is driven, that is, a predetermined pause time is provided after the cleaning is completed, and then the blower 6 is driven for a predetermined time. Therefore, after most of the cleaning liquid supplied to the filter 21 flows down, the air flows into the vent hole. Is distributed,
The cleaning liquid is not sucked into the blower 6.

That is, even if the pump electric motor 37 is stopped, the cleaning liquid drops on the upper part of the filter 21 and it takes time for the cleaning liquid supplied to the upper part of the filter 21 to flow to the lower part. If air is blown by driving the blower 6 (immediately after the electric motor 37 for the pump is stopped), air flows through the ventilation holes in a state where the cleaning liquid is flowing down along the filter 21, and the cleaning liquid flows with the air passing through the ventilation holes. It is sucked into the blower 6.

Further, since the blower 6 is driven with the blowing capacity gradually increased after the completion of the cleaning, the amount of air flowing through the ventilation holes of the filter 21 gradually increases, and the film of the cleaning liquid attached to the ventilation holes is broken. Later, the cleaning liquid flows down along the filter 21 and is not sucked into the blower 6 from the vent hole, so that the film of the cleaning liquid can be reliably broken.

That is, when the blower 6 is started to be driven with a large blowing capacity, a large amount of air flows from the beginning into the air hole of the filter 21, and the film of the cleaning liquid attached to the air hole is broken, and at the same time, the air inside the air blower 6 is discharged from the air hole with the air. Will be sucked into. In addition, since the amount of air flowing through the air hole when the film of the cleaning liquid attached to the air hole is broken is not constant, the film of the cleaning liquid can be reliably broken by gradually increasing the blowing capacity of the blower 6.

Next, a second embodiment of the present invention will be described. As shown in FIG. 3, the electric motor 12 for the blower is provided with a winding 50 for weak rotation, a winding 51 for medium rotation, and a winding 52 for strong rotation.

When the set time of the third timer 46 elapses after the pump electric motor 37 stops, the weak rotation winding 50 is energized for a predetermined time as shown in FIG. 4 to start driving the blower 6 with a small blowing capacity. Then, the intermediate rotation winding 51 is energized for a predetermined time to drive the blower 6 at the blowing capacity, and finally, the strong rotation winding 52 is energized for a predetermined time to drive the blower 6 at the large blowing capacity. Stop.

In this way, since the amount of air flowing through the ventilation hole of the filter 21 increases stepwise, the cleaning liquid of the broken cleaning liquid film is not sucked into the blower 6 as described above. The winding 50 for weak rotation and the winding 51 for middle rotation may be sequentially energized to have two stages or four or more stages.

Next, a third embodiment of the present invention will be described. After the pump electric motor 37 stops, the third timer 4
After the lapse of the set time of 6, the high-winding winding 52 is intermittently energized so that the energizing time is gradually increased as shown in FIG. 5, so that the air blowing capacity of the blower 6 intermittently gradually increases. To

Also in this case, the cleaning liquid of the torn cleaning liquid film is not sucked into the blower 6 as described above. The middle winding 51 or the weak winding 50 may be energized in the same manner, or in the case of a motor having only one winding, the winding may be energized in the same manner.

In each of the above embodiments, the filter is cleaned by automatically driving the pump electric motor 37 after the end of ventilation and exhaust. However, a switch for driving the pump electric motor 37 is provided to provide ventilation and discharge. After the end, the user may operate the switch to perform the filter cleaning.

In each of the above embodiments, the filter 21 is cleaned by flowing the cleaning liquid down the filter 21. However, the cleaning liquid may be sprayed onto the filter 21 for cleaning.

[0046]

According to the first aspect of the present invention, after the cleaning of the filter 21, the blower 6 is driven for a predetermined time, and the film of the cleaning liquid adhering to the ventilation hole of the filter 21 is reliably formed by the air passing through the ventilation hole. The cleaning solution caught on the film of the cleaning solution does not remain on the filter surface.

Accordingly, the amount of evaporation of the cleaning liquid is significantly reduced, so that the amount of steam trapped in the hood 1 is almost eliminated, no rust is generated inside the hood 1, and electricity generated due to condensation on the charged part of the electric parts is reduced. No short circuit occurs.

In the case of a circulation type cleaning apparatus, almost no cleaning liquid remains on the filter surface and almost the entire amount of the cleaning liquid supplied to the filter surface is recovered in the cleaning liquid tank. The interval between replenishment of the cleaning liquid into the cleaning liquid tank is lengthened, and the user is not required to work.

Further, only the blower 6 is driven after the cleaning is completed, and the blower drive circuit of the range hood equipped with the conventional cleaning device may be remodeled, and a special mechanism such as filter vibration application is not required. The production cost is low.

According to the second aspect of the present invention, the blower 6 is driven for a predetermined time after the elapse of a predetermined pause time after the end of filter cleaning, so that most of the cleaning liquid supplied to the filter 21 flows into the vent hole after flowing down. Since the air flows, the cleaning liquid is not sucked into the blower 6.

According to the third aspect of the present invention, since the blower 6 is driven with the blowing capacity gradually increased after the completion of the cleaning, the amount of air flowing through the ventilation holes of the filter 21 gradually increases, and After the film of the attached cleaning liquid is broken, the cleaning liquid flows down along the filter 21 and is not sucked into the blower 6 from the ventilation hole, so that the film of the cleaning liquid can be reliably broken.

According to the fourth aspect of the present invention, since the blower 6 is driven with the blowing capacity gradually increased after the completion of the cleaning, the amount of air flowing through the ventilation hole of the filter 21 increases stepwise. Similarly to the invention according to the third aspect, the cleaning liquid of the broken cleaning liquid film is not sucked into the blower 6.

According to the fifth aspect of the present invention, the blower 6 is driven with the blowing capacity intermittently and gradually increased after the completion of the cleaning, so that the amount of air flowing through the ventilation hole of the filter 21 is reduced intermittently. The cleaning liquid of the film of the cleaning liquid that has been broken is not sucked into the blower 6 in the same manner as in the third aspect of the present invention.

[Brief description of the drawings]

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

FIG. 2 is a drive circuit diagram.

FIG. 3 is a drive circuit diagram showing a second embodiment.

FIG. 4 is a table showing the timing of energizing a winding;

FIG. 5 is a table showing a timing of energizing a winding according to a third embodiment;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hood body, 6 ... Blower, 12 ... Electric motor for blowers, 21 ... Filter, 30 ... Cleaning liquid gutter, 31 ... Water injection nozzle, 34 ... Cleaning liquid tank, 35 ... Cleaning liquid supply pump,
37 ... Electric motor for pump, 40 ... Operation panel, 41 ...
Run switch 42 Stop switch 43 Controller 44 First timer 45 Second timer 46
Third timer, 47: fourth timer, 50: winding for weak rotation, 51: winding for medium rotation, 52: winding for strong rotation.

Claims (5)

[Claims] 1. A range hood in which a filter 21 having a large number of small air holes and a blower 6 are provided in a hood body 1, and the air in the hood body 1 is sucked and exhausted by the blower 6 through the air holes of the filter 21. A cleaning means for supplying a cleaning liquid to the filter 21 to remove oil and the like adhering thereto; and a driving means for driving the blower 6 for a predetermined time after the supply of the cleaning liquid is stopped by the cleaning means. apparatus. 2. The filter cleaning device for a range hood according to claim 1, wherein said driving means is activated when a predetermined pause time elapses after the supply of the cleaning liquid is stopped. 3. The range hood filter cleaning device according to claim 1, wherein said driving means gradually increases the blowing capacity of said blower. 4. The filter cleaning device for a range hood according to claim 1, wherein the driving means increases the blowing capacity of the blower stepwise. 5. The filter cleaning device for a range hood according to claim 1, wherein said driving means intermittently increases the blowing capacity of said blower 6 intermittently.