JP3222582U - Kitchen exhaust system - Google Patents

Abstract

Disclosed is a kitchen exhaust device that reduces the accumulation amount of small particles in an exhaust duct, a fire damper, or the like. SOLUTION: A primary dust collection unit 1 provided in an exhaust hood for removing large particles in exhaust gas generated by cooking, and a small particle in the exhaust gas provided in a downstream side of the primary dust collection unit 1 for static electricity removal. Secondary charged dust collector 2, exhaust duct 3 provided to communicate from secondary charged dust collector 2 to the outdoors, and open / close provided between secondary charged dust collector 2 and exhaust duct 3 A free fire damper 4 and an exhaust fan 5 provided in the exhaust passage P from the primary dust collector 1 to the exhaust duct 3 are provided, and the exhaust gas passing through the secondary charged dust collector 2 passes through the fire damper 4. The exhaust fan 5 then flows into the exhaust duct 3. [Selection] Figure 1

Description

  The present invention relates to a kitchen exhaust device used for removing oils and fats in oily smoke generated in a kitchen and exhausting it outside from an exhaust duct.

Conventionally, as this type of kitchen exhaust system, a fire damper installed in the opening of the exhaust duct, a box-shaped chamber installed to cover the fire damper and having an opening below, and oil and fat in the exhaust are removed. For example, there is a grease filter having a built-in fire damper with a second filter provided between the fire damper and the first filter in the chamber (for example, , See Patent Document 1).
The second filter is equipped with a large number of holes and an oil and fat removing member made of cotton-like stainless fiber, a porous unglazed plate, or the like.
Thereby, since the exhaust of the kitchen passes through the separate first filter and the second filter twice, the oil and fat in the exhaust can be efficiently removed, and the oil and fat are less likely to adhere to the fire and the damper. The operation reliability is improved.

JP 2002-186680 A

By the way, in restaurants and food processing factories that use a large amount of oil, exhaust gas containing a large amount of oil and fat is continuously generated by cooking in the kitchen, so oil droplets and oil smoke in the exhaust gas enter the exhaust duct. Residual oil particles in the exhaust gas caused large oil droplets and small particles of oil smoke not only attached to the inner wall surface of the exhaust duct, but also dust and other dust adhered to it and easily accumulated. Oils and dusts adhering to the exhaust duct were heated by the cooking fire in the kitchen and were easily ignited because of the proximity to the cooking fire, causing a fire in the duct.
In recent years, restaurants that have commercial kitchens such as yakiniku restaurants, Chinese restaurants, ramen restaurants, yakitori restaurants, tempura restaurants, and Western restaurants that offer deep-fried foods have been increasingly used for fires caused by the kitchen exhaust duct. . In this regard, the government also added a new sentence in the Ministry of Land, Infrastructure, Transport and Tourism standard specification (2016 edition) that "the exhaust duct of the kitchen should take measures that can be inspected inside the duct," and residual oil droplets and smoke in the duct. It is urged to clean frequently.
However, in Patent Document 1, even if the oil and fat content in the exhaust gas is removed twice by the first filter and the second filter having different oil and fat removing structures, small particles containing oil smoke and the like are completely contained in the oil and fat content in the exhaust gas. It was difficult to collect. For this reason, small particles such as oil smoke that have passed through the first filter and the second filter flow into and adhere to the exhaust duct through the fire damper, and small particles such as oil smoke and dust are attached to the fire damper and exhaust duct for a short period of time. Will accumulate.
The fire dampers may be fixed when oil stains due to accumulation of oily smoke and dust reach a thickness of about 0.2 mm, causing a malfunction in the opening and closing operation. Cleaning work for the exhaust duct placed behind the fire dampers However, there is a problem that the risk of fire in the duct is high.

  In order to solve such a problem, a kitchen exhaust device according to the present invention includes a primary dust collection unit that is provided in an exhaust hood and removes large particles in exhaust generated by cooking, and a downstream side of the primary dust collection unit. A secondary charged dust collecting unit provided in the exhaust to remove small particles in the exhaust by static electricity, an exhaust duct provided so as to communicate from the secondary charged dust collecting unit to the outdoors, and the secondary charged collector. An openable / closable fire-proof damper provided between a dust part and the exhaust duct; and an exhaust fan provided in an exhaust passage from the primary dust collection part to the exhaust duct. Exhaust that has passed passes through the fire damper and flows into the exhaust duct by the exhaust fan.

BRIEF DESCRIPTION OF THE DRAWINGS It is explanatory drawing which shows the whole structure of the kitchen exhaust apparatus which concerns on embodiment (1st embodiment) of this invention, and is a vertical front view of an attachment state (at the time of use). It is explanatory drawing which shows a removal state (at the time of cleaning), (a) is a vertical front view, (b) is a partial exploded perspective view. It is explanatory drawing which shows the modification (2nd embodiment) of the kitchen exhaust apparatus which concerns on embodiment of this invention, (a) is a vertical front view of an installation state (at the time of use), (b) is a partial perspective view. It is. It is explanatory drawing which shows a removal state (at the time of cleaning), (a) is a longitudinal front view, (b) is a partial perspective view. It is explanatory drawing which shows the modification (3rd embodiment) of the kitchen exhaust apparatus which concerns on embodiment of this invention, and is a vertical front view of an attachment state (at the time of use). It is explanatory drawing (longitudinal front view) which shows a removal state (at the time of cleaning).

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 6, the kitchen exhaust apparatus A according to the embodiment of the present invention is used in a restaurant K or a food processing factory having a large amount of oil used or in a kitchen K such as a home exhaust fan. This is an exhaust purification device that removes oil and fats and dusts in the generated exhaust and exhausts them to the outdoor O.
Kitchen K includes yakiniku restaurants, Chinese restaurants, ramen restaurants, yakitori restaurants, tempura restaurants, Western restaurants that provide deep-fried food, and kitchens for general households.
More specifically, the kitchen exhaust device A according to the embodiment of the present invention includes a primary dust collection unit 1 provided in the exhaust hood H, a secondary charged dust collection unit 2 provided on the downstream side of the primary dust collection unit 1, and An exhaust duct 3 provided from the secondary charged dust collecting unit 2 to the outdoor O, a fireproof damper 4 provided between the secondary charged dust collecting unit 2 and the exhaust duct 3, and an exhaust duct 3 from the primary dust collecting unit 1 And an exhaust fan 5 provided in the exhaust passage P leading to the main passage.

The exhaust hood H of the kitchen K has an opening H1 for exhaust. As the exhaust hood H, a single-sided type in which an opening H1 is opened on one surface (one side), a double-sided type in which a pair of openings H1 are opened on two surfaces (both sides), and three or more surfaces A multi-face type in which three or more openings H1 are opened is used.
The primary dust collecting unit 1 is a filter that is installed near the opening H1 and removes oil droplets mainly having a large particle diameter due to oil and fat in the exhaust gas generated by cooking, and is attached to and detached from the exhaust hood H. It is attached freely.
Further, the primary dust collecting unit 1 includes a first filter 11 that collects large particles with oil and fat in the exhaust, and a second filter 12 that collects intermediate particles with oil and fat in the exhaust that has passed through the first filter 11. It is preferable to have.
The first filter 11 is the first filter used mainly for capturing relatively large particles such as oil droplets in the exhaust gas (steam) containing oil and fat generated by cooking.
The second filter 12 is smaller than relatively large particles such as oil droplets mainly in the exhaust gas (steam) containing oil and fat, etc., but is larger than small particles such as oil smoke. It is an auxiliary filter used to catch drops and the like.

1 to 6 as specific examples of the primary dust collecting unit 1, the first filter 11 is a grease filter, and the oil and fat in the exhaust gas is caused by inertial collision of the oil and fat content in the exhaust gas with the grease filter. Oil droplets having a large particle diameter are separated and removed from the minute. The grease filter has a filter part 11a where oil and fat collide inertially, and an oil cup (not shown) for collecting oil droplets separated by the filter part 11a.
As for the attachment / detachment structure of the first filter 11, it is preferable that the first filter 11 is detachably attached from the opening H1 of the exhaust hood H.
In the case of the illustrated example, the first filter 11 is tilted with respect to the opening H1 of the exhaust hood H, so that the first filter 11 is set to a size that passes through the opening H1. It can be removed to the side and cleaned.
As the second filter 12, a demister filter in which a plurality of meshes 12a are overlapped is used. By causing oil and fat content in exhaust to collide inertially with the demister filter, oil droplets of medium particle diameter are generated from the oil and fat in exhaust. Separated and removed.
As for the attachment / detachment structure of the second filter 12, it is preferable that the second filter 12 is detachably attached to the kitchen K side from the vicinity of the secondary charged dust collection unit 2 described later.
Although not shown as another example, the first filter 11 and the second filter 12 can be changed to a filter having a structure other than the illustrated example.

In the exhaust hood H, the secondary charged dust collection unit 2 is the last installed between the primary dust collection unit 1 (first filter 11 and second filter 12) and an exhaust duct 3 and a fire damper 4 described later. It is a filter. The secondary charged dust collecting unit 2 is configured to electrostatically remove small particles containing dust such as oily smoke and dust in the oil and fat in the exhaust gas that has passed through the primary dust collecting unit 1.
The secondary charged dust collecting unit 2 includes a main body (not shown) of the electric dust collector, a dust collecting unit 21 that is detachably supported with respect to the main body, and a dust collecting unit 21 that is supported by the main body. And an electrical contact 22 for electrically connecting the dust unit 21.
The dust collection unit 21 generates corona discharge by applying a high voltage from the main body of the electrostatic dust collector that is electrically connected via the heat-resistant electrical contacts 22, and the oil dust and dust having a small particle diameter in the exhaust gas. It is configured to be charged and collected.
Further, at least the dust collection unit 21 in the secondary charged dust collection unit 2 is detachably attached not only to the main body of the electric dust collector but also to the exhaust hood H, and the opening H1 of the chamber constituting the exhaust hood H1. It is structured so that it can be easily taken out from H2 to the kitchen K side and cleaned.
The dust collection unit 21 is preferably downsized so that it can be cleaned with a dishwasher (not shown) installed in the kitchen K or the like.

The exhaust duct 3 is formed so as to communicate with the secondary charged dust collection unit 2 installed in the exhaust hood H and the outdoor O, and inside the exhaust duct 3 from the primary dust collection unit 1 to the outdoor O It has an exhaust passage P leading to.
When a solid line is shown in FIGS. 1 to 6 as a specific example of the exhaust duct 3, it passes through the ceiling wall C and the like of the kitchen K and communicates with the outdoor O such as the roof and the outer wall.
As another example, as indicated by a two-dot chain line in FIG. 1, it is possible to penetrate the side wall W of the kitchen K and communicate with the outdoor O such as the outer wall surface.

The fire damper 4 is installed near the inlet 31 of the exhaust duct 3 in the exhaust passage P, and has blades 42 that can be opened and closed with respect to the casing 41.
By adjusting the opening / closing angle with respect to the casing 41, the air flow through the exhaust passage P can be adjusted, and the blades 42 are closed when a fire occurs in the kitchen K, so Configured to prevent transmission of fire.
The exhaust fan 5 is installed on the downstream side of the primary dust collection unit 1 in the exhaust passage P, sucks the exhaust gas generated by cooking of the kitchen K, and discharges it to the outdoor O from the outlet 32 of the exhaust duct 3 along the exhaust passage P. It is configured as follows.
In the case shown in FIGS. 1 to 6 as a specific example of the exhaust fan 5, a sirocco fan is installed between the secondary charged dust collection unit 2 and the outdoor O. In the illustrated example, the exhaust fan 5 is disposed near the outlet 32 of the exhaust duct 3.
Although not shown as other examples, between the first filter 11 and the second filter 12 of the primary dust collector 1 or between the second filter 12 of the primary dust collector 1 and the secondary charged dust collector 2. It is possible to change the arrangement such as installation.

According to the kitchen exhaust apparatus A according to the embodiment of the present invention, the primary collection is performed before the dusts such as oil and dust of small particles are removed by the oil and fat content in the exhaust by the secondary charged dust collection unit 2. The dust part 1 removes oil droplets of large particles due to the oil and fat content in the exhaust gas.
For this reason, the secondary charged dust collecting portion 2 is not easily clogged with oil droplets of large particles in the exhaust.
In addition to this, the secondary charged dust collection unit 2 removes small particles of oil smoke and dust in the exhaust gas, so that the collection efficiency of oil and fats is improved, and the exhaust duct 3 and the fire damper 4 are improved. Small particles of oil smoke and dust are less likely to adhere.
Therefore, the accumulation amount of small particles (oil smoke and dust) with respect to the exhaust duct 3 and the fire damper 4 can be reduced.
As a result, the primary dust collecting unit 1 and the secondary dust are smaller than the conventional one in which small particles such as oil smoke that have passed through the first filter and the second filter flow into and adhere to the exhaust duct through the fire damper and accumulate together with dust. The double function of the charged dust collecting unit 2 can suppress the inflow of oil droplets or smoke from the suction port side of the exhaust duct 3, and at the same time increase the cleanliness in the exhaust duct 3.
For this reason, the cleaning period of the exhaust duct 3 and the fire damper 4 can be extended significantly, facilitating the maintenance, and the fire damper 4 can be opened and closed without frequently cleaning the exhaust duct 3 and the fire damper 4. Is able to operate and can reliably prevent the exhaust duct 3 from being ignited.
In particular, it is possible to prevent fires in ducts at restaurants that have commercial kitchens such as yakiniku restaurants, Chinese restaurants, ramen restaurants, yakitori restaurants, tempura restaurants, and Western restaurants that provide deep-fried food.

In particular, it is preferable that the dust collection unit 21 of the primary dust collection unit 1 and the secondary charged dust collection unit 2 is detachably attached to the exhaust hood H.
In this case, the dust collection unit 21 can be easily cleaned by sequentially removing the dust collection units 21 of the primary dust collection unit 1 and the secondary charged dust collection unit 2 from the exhaust hood H.
For this reason, the dust collecting unit 21 becomes more difficult to clog.
Therefore, the dust collection unit 21 can be further prevented from being clogged with an easy-to-clean attachment structure for the dust collection unit 21.
As a result, the collection efficiency of small particles such as oil smoke and dust by the dust collection unit 21 of the secondary charged dust collection unit 2 can be improved. Thereby, even if it does not clean the exhaust duct 3 or the fireproof damper 4 over a long period of time, the fireproof damper 4 can be opened and closed, and ignition to the exhaust duct 3 can be reliably prevented.
For this reason, fires in ducts can be prevented over a long period of time even at yakiniku restaurants, Chinese restaurants, ramen restaurants, yakitori restaurants, tempura restaurants, and western food restaurants that provide deep-fried food.
Furthermore, it is preferable to reduce the size of the dust collection unit 21 of the secondary charged dust collection unit 2 so that the dust collection unit 21 can be cleaned with a dishwasher or the like. In this case, the cleaning operation of the dust collection unit 21 becomes extremely easy, and further improvement in the collection efficiency of small particles such as oil smoke and dust can be expected.

Further, the primary dust collecting unit 1 collects large particles containing oil droplets in the exhaust gas, and the second filter 12 collects intermediate particles in the exhaust gas that has passed through the first filter 11. It is preferable to have.
In this case, after collecting the oil droplets of large particles with the oil and fat content in the exhaust gas by the first filter 11 of the primary dust collection unit 1, oil smoke and dust are collected with the oil and fat content in the exhaust gas by the secondary charged dust collection unit 2. Prior to the removal of small particles containing dusts, etc., oil droplets of intermediate particles are collected by the second filter 12 with the oil and fat content in the exhaust gas.
For this reason, large particles such as oil droplets and intermediate particles such as oil droplets and oil smoke are less likely to adhere to the secondary charged dust collection unit 2 due to the oil and fat content in the exhaust gas.
Therefore, the amount of intermediate particles (oil droplets, etc.) attached to the secondary charged dust collecting portion 2 is reduced, so that intermediate particles (oil droplets, etc.) and small particles (oil smoke and dust) on the exhaust duct 3 and the fire damper 4 are reduced. Can be reduced.
As a result, the cleaning period of the exhaust duct 3 and the fire damper 4 can be extended over a long period of time, and maintenance is facilitated. Even if the exhaust duct 3 and the fire damper 4 are not cleaned for a long period of time, The fire damper 4 can be opened and closed, and the exhaust duct 3 can be reliably prevented from igniting.
For this reason, fires in ducts can be prevented over a long period of time even at yakiniku restaurants, Chinese restaurants, ramen restaurants, yakitori restaurants, tempura restaurants, and western food restaurants that provide deep-fried food.

Next, the kitchen exhaust apparatus A according to the first to third embodiments of the present invention will be described with reference to FIGS.
In the kitchen exhaust apparatus A according to the first embodiment of the present invention, as shown in FIGS. 1 and 2A and 2B, the exhaust hood H is a single-sided chamber having an opening H1 only on one side. The first filter 11 of the primary dust collector 1 is detachably attached to the kitchen K side with respect to the two openings H1.
In the internal space HS of the exhaust hood H (single-sided chamber), a space is provided between the first filter 11 of the primary dust collection unit 1 attached to the opening H1 and the dust collection unit 21 of the secondary charged dust collection unit 2 is provided. Is detachably attached.
In the case shown in FIG. 1 and FIGS. 2A and 2B as an example of the attachment position of the dust collection unit 21, the dust collection unit 21 is arranged close to the fire damper 4 near the inlet 31 of the exhaust duct 3.
Further, although not shown as another example, the dust collection unit 21 can be changed to be disposed at a location away from the inlet 31 of the exhaust duct 3 or the fireproof damper 4.

As an example of the attachment / detachment structure of the dust collection unit 21, the attachment / detachment case 23 is detachably provided to the exhaust hood H in the case shown in FIGS. The dust collection unit 21 is configured to be detachably stored. By removing the detachable case 23, the dust collecting unit 21 can be taken out from the opening H1 of the exhaust hood H together with the detachable case 23.
The detachable case 23 has an opening edge that is detachably joined to an inlet / outlet 23a of the dust collection unit 21 provided at one end surface communicating with the inlet 31 of the exhaust duct 3 and the fire damper 4 and the ceiling surface H3 of the exhaust hood H. 23b and a suction port 23c provided on the other end surface.
In the illustrated example, the dust collecting unit 21 and the second filter 12 are accommodated from the entrance / exit 23a of the detachable case 23 so that the second filter 12 faces the suction port 23c of the detachable case 23, and the opening edge 23b of the detachable case 23 is formed. The exhaust hood H is joined so as to be slidable along the ceiling surface H3 of the exhaust hood H.
Furthermore, the opening edge 23b of the detachable case 23 is fixed to a rail (not shown) formed on the ceiling surface H3 of the exhaust hood H by a fastening part (not shown) such as a wing nut. For this reason, after removing the fastening parts in the attached state of FIG. 1, the opening edge 23b of the detachable case 23 is slid along the rail of the ceiling surface H3 toward the opening H1 of the chamber, thereby FIG. The detachable case 23 is removed as in the detached state, and the dust collecting unit 21 and the second filter 12 can be cleaned from the kitchen K side.

In the kitchen exhaust apparatus A according to the second embodiment of the present invention, as shown in FIGS. 3A and 3B and FIGS. 4A and 4B, the exhaust hood H has a pair of openings H2 on both sides. Unlike the first embodiment described above, the configuration in which the first filter 11 of the primary dust collecting unit 1 is detachably attached to the kitchen K side with respect to the pair of openings H2 is different from the first embodiment described above. The configuration is the same as in the first embodiment.
In the internal space HS of the exhaust hood H (double-sided chamber), a space is provided between the primary filter 11 of the primary dust collector 1 attached to the pair of openings H2, and the secondary charged dust collector 2 is collected. The dust unit 21 is detachably attached.
The cases shown in FIGS. 3A and 3B and FIGS. 4A and 4B are also common in that the dust collection unit 21 is arranged close to the fire damper 4 near the inlet 31 of the exhaust duct 3. ing.
Further, although not shown as another example, the dust collection unit 21 can be changed to be disposed at a location away from the inlet 31 of the exhaust duct 3 or the fireproof damper 4.

As another example of the attachment / detachment structure of the dust collection unit 21, the movable case 24 can be opened and closed with respect to the exhaust hood H in the case shown in FIGS. 3 (a), 3 (b) and FIGS. It is provided and configured to detachably store the dust collection unit 21 inside the movable case 24. By opening the movable case 24, the dust collection unit 21 can be taken out from the opening H2 of the exhaust hood H.
The movable case 24 includes a mounting frame 24a provided on one end face communicating with the inlet 31 of the exhaust duct 3 and the fireproof damper 4, a movable frame 24b supported so as to be movable in the opening / closing direction with respect to the mounting frame 24a, and a movable frame. A movable inlet / outlet 24c of the dust collection unit 21 provided in 24b and a movable suction port 24d provided in the other end surface are provided. The mounting frame 24a is fixed to the ceiling surface H3 of the exhaust hood H or the like.
In the illustrated example, the dust collecting unit 21 and the second filter 12 are accommodated from the movable inlet / outlet 24 c of the movable case 24 so that the second filter 12 faces the movable suction port 24 d of the movable case 24. A movable frame 24b is suspended from 24a so as to be movable in a direction away from the ceiling surface H3 of the exhaust hood H.
Further, a fastener 24e such as a buckle and a stopper 24f for restricting a moving range of the movable frame 24b relative to the attachment frame 24a are provided over the attachment frame 24a and the movable frame 24b. For this reason, after removing the fastener 24e in the attached state of FIGS. 3 (a) and 3 (b), the movable frame 24b is moved away from the attachment frame 24a, whereby the detached state of FIGS. 4 (a) and 4 (b) is obtained. Thus, the movable doorway 24c is opened, and the dust collection unit 21 and the second filter 12 can be cleaned from the kitchen K side.
Thereby, the kitchen exhaust apparatus A according to the second embodiment has an advantage that the exhaust capacity is improved by an amount corresponding to an increase in the exhaust area of the exhaust hood H (total area of the opening H2) compared to the first embodiment. .

In the kitchen exhaust apparatus A according to the third embodiment of the present invention, as shown in FIGS. 5 and 6, a plurality of secondary charged dust collection parts 2 are provided with respect to the inlet 31 of the exhaust duct 3 and the fire damper 4. The arranged configuration is different from the first embodiment and the second embodiment described above, and the other configurations are the same as the first embodiment and the second embodiment.
In the example shown in FIGS. 5 and 6, the exhaust hood H is the same double-sided chamber as in the second embodiment, and the first filter 11 of the primary dust collecting unit 1 is moved to the kitchen K side with respect to the pair of openings H2. Removably attached.
In the internal space HS of the exhaust hood H (double-sided chamber), the dust collection units 21 of the two secondary charged dust collection units 2 are arranged at locations away from the inlet 31 of the exhaust duct 3 and the fire damper 4.
Further, although not shown as another example, the exhaust hood H can be changed to a multi-face type in which three or more openings H1 are opened on three or more surfaces so that three or more dust collecting units 21 are arranged. It is.

As another example of the attachment / detachment structure of the dust collection unit 21, as shown in FIGS. 5 and 6, the fixed case 25 is provided so as not to move with respect to the exhaust hood H, and a plurality of collecting units are arranged inside the fixed case 25. The dust unit 21 is configured to be detachably stored. A plurality of dust collecting units 21 can be respectively taken out from a plurality of fixed suction ports 25 a provided in the fixed case 25.
The fixed case 25 includes a fixed suction port 25a set to a size through which the dust collection unit 21 passes and a support base 25b that supports the dust collection unit 21 along the fixed suction port 25a by the number of dust collection units 21. Have.
In the illustrated example, the dust collection unit 21 and the second filter 12 are stored from the fixed suction port 25a of the fixed case 25 so that the second filter 12 faces the fixed suction port 25a of the fixed case 25, and along the support base 25b. The dust collection unit 21 and the second filter 12 are detachably mounted.
Furthermore, the fixed suction port 25a of the fixed case 25 is set to a size that passes through the fixed suction port 25a by an operation such as the inclination of the dust collection unit 21 or the second filter 12. Therefore, when the dust collection unit 21 and the second filter 12 are detached from the fixed suction port 25a in the attached state of FIG. 5, the dust collection unit 21 is removed from the kitchen K side as in the detached state of FIG. And the second filter 12 can be cleaned.
Thereby, the kitchen exhaust apparatus A which concerns on 3rd embodiment improves the collection efficiency of fats and oils by the part which the number of the secondary charge dust collection parts 2 increased compared with 1st embodiment or 2nd embodiment. There are advantages to doing.

In the previous embodiment (first embodiment to third embodiment), the exhaust hood H is a single-sided type in which an opening H1 is opened on one surface (single side) or a pair on two surfaces (both sides). However, the present invention is not limited to this, and a multi-face type in which three or more openings are formed on three or more surfaces may be used.
Furthermore, although the detachable case 23, the movable case 24, and the fixed case 25 are used as the detachable structure of the dust collection unit 21, the present invention is not limited to this, and an detachable structure other than the illustrated example may be used.

A Kitchen exhaust system 1 Primary dust collecting part 11 First filter 12 Second filter 2 Secondary charged dust collecting part 21 Dust collecting unit 3 Exhaust duct 4 Fire damper 5 Exhaust fan H Exhaust hood O Outdoor P Exhaust passage

Claims (3)

A primary dust collecting unit provided in the exhaust hood to remove large particles in the exhaust generated by cooking;
A secondary charged dust collecting portion provided on the downstream side of the primary dust collecting portion for removing small particles in the exhaust gas by static electricity;
An exhaust duct provided so as to communicate from the secondary charged dust collecting portion to the outdoors;
An openable and closable fire damper provided between the secondary charged dust collection unit and the exhaust duct;
An exhaust fan provided in an exhaust passage extending from the primary dust collection portion to the exhaust duct,
The kitchen exhaust device according to claim 1, wherein the exhaust gas that has passed through the secondary charged dust collection unit passes through the fire damper and flows into the exhaust duct by the exhaust fan.   The kitchen exhaust apparatus according to claim 1, wherein a dust collection unit of the primary dust collection unit and the secondary charged dust collection unit is detachably attached to the exhaust hood.   A primary filter that collects large particles containing oil droplets in the exhaust; and a second filter that collects intermediate particles in the exhaust that have passed through the first filter. The kitchen exhaust device according to claim 1, wherein the kitchen exhaust device is provided.

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