JP2000199638A - Kitchen hood and filter therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily recover an increase in a vent resistance due to clogging of a filter member by providing a filter roll obtained by winding a filter member at an inside of a hood body, traversing the unrolled member across a vent passage, and then winding the end side by a winding roll. SOLUTION: In a hood body 1, a grease filter is formed in a rolled state by winding a filter member 4a on a winding roll 4b, and the roll 4b is detachably and rotatably mounted at a bearing disposed at an inside of one of window frames 5a surrounding a suction window 5b of a grease filter box 5. The member 4a wound on the roll 4b is unrolled from an end of the roll, and drawn to be disposed along an inside of the window 5b. Thus, a venting part contaminated by the venting part oppositely to the window 5b is sequentially wound on the roll 4c, and new venting part is opposed to the window 5b, a venting resistance caused by excess clogging of the filter due to dirt can be prevented from being increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a kitchen hood and a filter for a kitchen hood.

[0002]

2. Description of the Related Art In a kitchen hood, a grease filter is detachably provided in front of an exhaust fan (upstream of an exhaust flow) to remove oil and grease from the exhaust by attaching oily smoke. To reduce contamination. A grease filter that is contaminated with an oil or fat component is clogged and increases ventilation resistance, thereby lowering the exhaust efficiency. Therefore, the grease filter is removed and cleaned or replaced.

[0003] However, since the kitchen hood is installed at a relatively high place, it is difficult or dangerous to attach and remove a filter. Cleaning for removing oil stains is a troublesome operation, and grease contaminated with oil and fat components is required. Cleaning and replacing the filter also has the problem of dirty hands.

[0004] On the other hand, in order to reduce the contamination of the oil and fat components that have passed through the grease filter without being collected by the grease filter and adhere to the inner surfaces of the exhaust fan and the exhaust duct, the oil and fat components pass through the grease filter and then pass through the exhaust fan. By spraying water with a spray nozzle on oil smoke containing oil and fat components to be sucked in, the kitchen is configured to condense the oil and fat components, collect it as wastewater in a water receiving pan provided below the grease filter, and drain it. A hood has been proposed (for example, see JP-A-8-219517). However, in the case of this kitchen hood, the structure is complicated, and special construction such as plumbing and plumbing is required, so that it is expensive, and it is difficult to install the kitchen hood in an existing building.

[0005]

SUMMARY OF THE INVENTION One object of the present invention is to provide a kitchen hood which can easily recover from an increase in airflow resistance due to clogging of a filter member with a simple structure.

Another object of the present invention is to provide a small-sized kitchen hood filter suitable for easily recovering from an increase in ventilation resistance due to clogging of a filter member.

[0007]

One aspect of the present invention is a kitchen hood in which a filter is installed so as to cross a ventilation path, in which a filter roll around which a filter member is wound is installed inside a hood body. After the unwound filter member was traversed through the ventilation path, the leading end side was wound up by a take-up roll.

An automatic wind-up driving device for driving the wind-up roll is provided, and the wind-up roll is driven so as to wind up a predetermined amount of the filter member in accordance with the operation control or operation time of the exhaust fan.

Alternatively, a drive handle for driving the winding roll is provided.

[0010] The filter member is wound into a roll shape, and is sequentially unwound from the winding end portion, crosses the ventilation path, and then is wound up by a winding roll.

[0011]

1 and 2 are perspective views of a kitchen hood according to the present invention. FIG. 1 shows a kitchen hood provided with a grease filter using a filter member made of metal fiber. 2 has a thickness of 0.
It is a kitchen hood provided with a grease filter using a filter member in which a large number of holes are formed in an aluminum foil of about 03 to 0.1 mm. FIG. 3 is a side view of these kitchen hoods.

These kitchen hoods have a hood body 1
A front cover 2, a curtain plate 3, a grease filter box 5 containing a grease filter 4, and an exhaust fan 6.
, An operation switch 7 and a drive handle 8 for winding the filter.

The grease filter box 5 is located on the front side of the exhaust fan 6 and has an intake window 5b surrounded by a window frame 5a which can be opened and closed by turning or attaching and detaching on the front surface thereof. The grease filter 4 is built in so as to cover from the inside.

The grease filter 4, which will be described in detail later, is formed by winding a long filter member into a roll shape, and the window frame 5b on one side of an intake window 5b formed in the window frame 5a.
a, and then winds out from the winding end portion in order and traverses the intake window 5b along the window frame 5a so as to cover the intake window 5b from the inside, and then the window frame on the other side. The take-up roll provided inside 5a winds up, and the air-permeable portion which is contaminated by airflow facing the intake window 5b is sequentially taken up by the take-up roll, so that a new air-permeable portion faces the intake window 5b. By doing so, it is possible to prevent an increase in airflow resistance due to excessive clogging of the grease filter 4 due to dirt.

In the kitchen hood, by turning on the operation switch 7 and operating the exhaust fan 6, the room air contaminated with oil smoke or the like is sucked through the grease filter 4 from the intake window 5b, and the oil smoke is supplied to the grease filter 4. After being adhered and removed, the air is exhausted outside through an exhaust passage (not shown). Then, the grease filter 4 clogged due to the adhesion of the oily smoke is rotated by the drive handle 8 as needed to wind up the take-up roll. It is moved out of the intake window 5b so that a new ventilation portion faces the intake window 5b so that the ventilation resistance due to clogging does not become excessive.

As described above, the present invention makes it possible to easily recover (decrease) the ventilation resistance increased by the clogging of the grease filter 4 due to the adhesion of oil smoke in a kitchen hood. A description will be given of a specific example of a kitchen hood in which a grease filter 4 using a filter member in which a large number of holes are perforated in a metal film rich in properties is installed.

FIGS. 4 to 8 show a first embodiment of a grease filter device. FIG. 4 is a cross-sectional plan view of a kitchen hood provided with a grease filter, and FIG. FIG. 6 is a front view showing a state where a grease filter box in which a grease filter is installed is opened. FIG. 7 and FIG.
It is a top view which shows the installation form of the filter press in a grease filter box, and an unwinding roll and a winding-up roll.

The grease filter 4 includes a filter member 4
a is wound around an unwinding roll 4b to form a roll,
The unwinding roll 4b is attached to the grease filter box 5
The filter member 4a is detachably and rotatably mounted on bearings 5c, 5d located inside one side of a window frame 5a surrounding the intake window 5b, and wound around an unwinding roll 4b.
Is drawn out from the winding end portion and pulled out along the inside of the intake window 5b. Inside the intake window 5b, filter holders 5e and 5f are installed along the window frame 5a, and the filter member 4a crosses the intake window 5b along the window frame 5a and covers the intake window 5b. The inside of the filter frame 4a is pressed so as to be close to the window frame 5a so as to suppress the air leakage between the filter member 4a and the window frame 5a.

The filter member 4a that has passed through the filter retainer 5e is provided with bearings 5g, 5h located inside the other side of the window frame of the intake window 5b of the grease filter box 5.
Take-up roll 4c detachably attached to and rotatably attached to
Is inserted into the slit 4d and wound.

The bearing 5h is a grease filter box 5
And a drive handle 8 for winding the filter, which extends into the bearing 5h from the lower outside and fits with the winding roll 4c attached to the bearing 5h.

In the embodiment in which a wide space for installing the unwinding roll 4b and the winding roll 4c exists inside the left and right window frames 5a of the grease filter box 5, FIG.
As shown in the figure, the unwinding roll 4b and the take-up roll 4c are installed outside the filter holders 5e and 5f, and the filter members 4a in the filter holders 5e and 5f are arranged.
Of the filter member 4a to reduce the movement resistance of the filter member 4a. However, in an embodiment in which the intake window 5b of the grease filter box 5 is large and there is no large space for installing the unwinding roll 4b and the winding roll 4c inside the left and right window frames 5a, as shown in FIG. The take-out roll 4b and the take-up roll 4c are installed inside the filter retainers 5e and 5f, and the filter member 4a is folded back by the filter retainers 5e and 5f.
b.

According to the kitchen hood configured as described above, the filter member 4a that covers the intake window 5b across the intake window 5b has a region (a ventilation portion) facing the intake window 5b.
When the motor is dirty with oil smoke and clogged, the drive handle 8
Is turned to rotate the take-up roll 4c to wind the filter member 4a around the take-up roll 4c so that the contaminated portion of the filter member 4a passes through the intake window 5b. Make sure that the clean parts you put out face each other.

When the filter member 4a wound around the unwinding roll 4b runs out, the window frame 5a is rotated or removed to open the grease filter box 5,
The take-up roll 4c that has taken up the dirty filter member 4a is removed from the bearings 5g and 5h and discarded.
c, 5d, and attached to bearings 5g, 5h to form a take-up roll.
Is attached, a new unwinding roll 4b is attached, the new filter member 4a is unwound and wound around the other winding roll 4c, and then installed so as to cover the intake window 5b of the closed window frame 5a.

The structure in which the unwinding roll 4b and the take-up roll 4c are attached to and detached from the bearings 5c, 5d and 5g, 5h is configured such that the upper core shaft (dough) of the rolls 4b, 4c can be elastically moved forward and backward into the rolls. It can be realized by supporting. Then, the roll 4b (4c) pushes up the roll 4b (4c) so that the upper core shaft is inserted into the bearing 5c (5g) and the core shaft is retracted into the roll, and the lower core shaft is moved downward. For mounting and dismounting by aligning and inserting the bearing 5d (5h), the roll 4b (4c) is pushed up so that the upper core shaft is retracted into the roll, and the lower core shaft is removed from the bearing 5d (5h). Remove, then
The roll 4b (4c) is pulled down so that the upper core shaft is pulled out from the bearing 5c (5g).

The unwinding roll 4b and the take-up roll 4c may be configured such that the core material is used repeatedly, and the filter member 4a is attached to and detached from the core material.

According to such a kitchen hood, the filter member 4a is moved by turning the drive handle 8 below the grease filter box 5 until the filter member 4a wound around the unwinding roll 4b runs out. As a result, the filter member (venting portion) 4a facing the intake window 5b is renewed, so that an increase in ventilation resistance due to clogging can be easily eliminated.

In addition, the renewal of the filter member 4a is basically performed by the unwinding roll 4b wound around the filter member 4a and the winding roll 4c winding up the filter member 4a unwound from the unwinding roll 4b. Set in the grease filter box 5 and take-up roll 4
Since c is rotated by the drive handle 8 from outside the grease filter box 5, it can be realized with a relatively simple configuration.

Next, a second embodiment of the grease filter device in which the filter member is automatically wound up to renew the ventilation portion will be described with reference to FIGS. FIG. 9 is a front view showing an open state of a grease filter box provided with a filter driving device, FIG. 10 is a block diagram of operation control of a fan driving motor and a filter driving motor, and FIGS. It is a control flowchart which is performed. In addition, about the component which is common in 1st Embodiment, the same referential mark is attached | subjected and the overlapping description is abbreviate | omitted, or illustration description is abbreviate | omitted.

In this embodiment, the grease filter box 5 has an umbrella toothed shaft having a shaft extending from the upper side into a bearing 5g inside the grease filter box 5 and fitted to a winding roll 4c attached to the bearing 5g. The bevel gear 9a includes a bevel drive gear 9b that meshes with the bevel drive gear 9a, and a filter drive motor 9c that drives the bevel drive gear 9b. That is, the take-up roll 4c that takes up the filter member 4a is driven by the filter drive motor 9c through the gears 9b and 9a to take up the filter member 4a.

A fan drive motor 6a for driving the exhaust fan 6 and the filter drive motor 9c are connected to a control device 10
Thus, the operation is controlled via the drive circuit 11. The control device 10 is configured around a CPU, and turns on / off the operation switch 7 according to the operation control program.
The operation control of the fan drive motor 6a and the filter drive motor 9c is executed according to the OFF information signal.

FIG. 11 shows an example of the operation control executed by the control device 10. In this operation control, the control device 1
0 indicates that the operation switch 7 is turned on (step 10).
1), the fan drive motor 6a is operated to make the exhaust fan 6 function, and exhaust is performed (step 102).

After that, the filter driving motor 9c is operated to wind the filter member 4a around the winding roll 4c, and the ventilation portion facing the intake window 5b is moved and updated (step 103). The operation time of the filter drive motor 9c is controlled by a timer, and a preset time is measured (step 104). When the set time has elapsed, the operation of the filter drive motor 9c is stopped to stop the movement of the filter member 4a (step 105). This operation control program includes the exhaust fan 6
Each time is operated, the filter member 4a is moved to update the ventilation portion. However, since the clogging of the filter member 4a in one operation is slight, the amount of renewal of the ventilation portion of the filter member 4a is small. It is preferable to set the time so that the ventilation portion corresponding to the width of the intake window 5b can be updated with the number of operations such that the clogging reaches the allowable value.
The amount of clogging in one operation depends on the time of one exhaust operation and the amount of contaminants such as oil smoke contained in the exhaust, so that the set time can be set according to the installation environment of the kitchen hood. It is desirable to provide changing means.

When the operation switch 7 is turned off,
The fan drive motor 6a is stopped (step 106).

FIG. 12 shows another example of the operation control executed by the control device 10. In this operation control, the filter member 4a is updated after the operation of the exhaust fan 6 is stopped.

In this control operation, when the operation switch 7 is turned on (step 201), the control device 10 operates the fan drive motor 6a to cause the exhaust fan 6 to function to perform exhaust (step 202). Then, when the operation switch 7 is turned off (step 203), the fan drive motor 6a is stopped (step 204).

Thereafter, the filter driving motor 9c is operated to wind the filter member 4a around the take-up roll 4c, and the ventilation portion facing the intake window 5b is moved and updated (step 205). The operation time of the filter drive motor 9c is controlled by a timer, and a preset time is measured (step 206). When the set time has elapsed, the operation of the filter drive motor 9c is stopped to stop the movement of the filter member 4a (step 207). The setting of the operation time of the filter drive motor 9c is performed in the same manner as in the above-described example.

In these operation controls, each time the fan drive motor 6a of the exhaust fan 6 is operated, the filter member 4a
Is moved to update the ventilation portion. However, the operation time of the fan drive motor 6a is measured, and when a predetermined operation time has elapsed (the operation in which the clogging of the filter member 4a reaches an allowable value). After a lapse of time), the filter driving motor 9c may be operated to move the filter member 4a so as to update the ventilation portion corresponding to the intake window 5b at a stretch.

The grease filter 4 can be a cartridge type replacement part as in the third embodiment shown in FIGS. FIG. 13 is a perspective view of a kitchen hood using the cartridge type grease filter. FIG. 14 is a perspective view showing a mounting / removal mode of the cartridge type grease filter with respect to the grease filter box.
FIG. 2 is a perspective view of the cartridge type grease filter. Note that components equivalent to those in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted, or illustrated description will be omitted.

This cartridge type grease filter 4
In the filter case 4e also serving as an intake window (window frame) on the front surface of the grease filter box 5, an unwinding roll 4b around which the filter member 4a is wound is provided rotatably, and unwound from the unwinding roll 4b. A filter press (not shown) is provided to press the filter member 4a across the intake window 4f so as to cover the intake window 4f.
Filter member 4a unwound and passed through intake window 4f
Is provided with a take-up roll 4c for taking up. The drive handle 8 for driving the take-up roll 4c is attached to the filter case 4e to form an integral replacement part.

The grease filter box 5 in which the cartridge type grease filter 4 is installed has its front surface opened, and the filter case 4e is detachably attached to the opening edge by a set screw 12.

According to such a grease filter 4,
Exhaust air from the exhaust fan is sucked through the intake window 4f of the filter case 4e, and is removed by attaching oily smoke to the filter member 4a. When the filter member 4a facing the intake window 4f is clogged, the drive handle 8 is turned to move the filter member 4a, thereby updating the ventilation portion facing the intake window 4f.

When the filter member 4a wound around the unwinding roll 4b runs out, the grease filter 4 is removed from the grease filter box 5 together with the filter case 4e and replaced with a new one.

In this way, in updating and replacing the ventilation part of the grease filter 4, the operator does not need to touch the filter member 4a contaminated with oily smoke, which is sanitary and simple.

The outer periphery of the filter case 4e of the cartridge type grease filter 4 is
If the insertion / removal method is adopted in which the cartridge type grease filter 4 is inserted and fitted from the opening edge of the cartridge type grease filter box 5, the attachment / detachment of the cartridge type grease filter 4 can be further facilitated.

In each of the above-described embodiments, the front surface forming the intake window 5b of the grease filter box 5 is a vertical surface. However, as in the fourth embodiment shown in FIG. Alternatively, it may be configured so that rising smoke can be effectively collected and inhaled. Components equivalent to those in the above-described embodiment are denoted by the same reference numerals, and redundant description will be omitted. The same can be applied to a cartridge type grease filter.

[0046]

According to the present invention, since the filter member is moved to change the ventilation portion, it is possible to easily recover the increase in the ventilation resistance due to the clogging of the filter member with a simple structure.

In addition, this filter is formed in a roll shape by winding the filter member, and is positioned in the exhaust passage while being unwound. Therefore, the long filter member is compactly installed in the filter box. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a kitchen hood of the present invention.

FIG. 2 is a perspective view showing another example of the kitchen hood of the present invention.

FIG. 3 is a side view of the kitchen hood of the present invention.

FIG. 4 is a horizontal sectional plan view showing the first embodiment of the kitchen hood of the present invention.

FIG. 5 is a perspective view of a grease filter according to the first embodiment of the present invention.

FIG. 6 is a front view showing a state in which a grease filter box provided with a grease filter according to the first embodiment of the present invention is opened.

FIG. 7 is a horizontal cross-sectional view showing an example of an installation form of a filter press, a take-out roll, and a take-up roll in the grease filter box according to the first embodiment of the present invention.

FIG. 8 is a horizontal cross-sectional view showing another example of the installation mode of the filter press, the unwinding roll, and the winding roll in the grease filter box according to the first embodiment of the present invention.

FIG. 9 is a front view showing a state in which a grease filter box provided with a grease filter according to a second embodiment of the present invention is opened.

FIG. 10 is a block diagram of operation control of a fan drive motor and a filter drive motor according to a second embodiment of the present invention.

FIG. 11 is a flowchart illustrating an example of a control process executed by a control device according to the second embodiment of the present invention.

FIG. 12 is a flowchart illustrating another example of the control processing executed by the control device according to the second embodiment of the present invention.

FIG. 13 is a perspective view showing a kitchen hood according to a third embodiment of the present invention.

FIG. 14 is a perspective view showing a removable form of a cartridge type grease filter with respect to a grease filter box according to a third embodiment of the present invention.

FIG. 15 is a perspective view of a cartridge type grease filter according to a third embodiment of the present invention.

FIG. 16 is a vertical sectional side view showing a fourth embodiment of the kitchen hood of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Hood main body, 2 ... Front cover, 4 ... Grease filter, 4a ... Filter member, 4b ... Unwinding roll, 4
c: take-up roll, 5: grease filter box,
5b: intake window, 6: exhaust fan, 7: operation switch, 8
… Drive handle.

Claims (4)

[Claims] 1. A kitchen hood in which a filter is installed so as to cross a ventilation path, wherein a filter roll wound with a filter member is installed inside a hood body, and a filter member unwound from the filter roll is passed through a ventilation path. A kitchen hood characterized in that, after being traversed, its leading end is taken up by a take-up roll. 2. An apparatus according to claim 1, further comprising an automatic winding drive device for driving said winding roll, wherein said winding roll is wound so as to wind a predetermined amount of a filter member in accordance with operation control or operation time of an exhaust fan. A kitchen hood characterized by being driven. 3. A kitchen hood according to claim 1, further comprising a drive handle for driving said take-up roll. 4. A kitchen hood filter in which a filter member is installed so as to cross a ventilation path of the kitchen hood, wherein the filter member is wound into a roll shape, and is sequentially unwound from a winding end portion. A filter for kitchen hood, wherein the filter is taken up by a take-up roll after being traversed by an air passage.