WO2005003640A1

WO2005003640A1 - Range hood fan having filter

Info

Publication number: WO2005003640A1
Application number: PCT/JP2003/008307
Authority: WO
Inventors: Yoshihiro Yamada
Original assignee: Yamazen Co., Ltd.
Priority date: 2003-06-30
Filing date: 2003-06-30
Publication date: 2005-01-13
Also published as: US20060070617A1; AU2003244197A1; JP3849065B2; CN1682080A; JPWO2005003640A1; EP1640674A1

Abstract

A range hood fan (100) is constituted of a case main body (10) connected partly to an exhaust gas duct (220) and forming an exhaust gas passage (14) inside the case main body, a fan motor (30) supported by a partition wall (12) in the case main body (10) and having a fan (32) on a rotation shaft (31), and an exhaust gas suction opening (15) formed in a portion open in a hood main body (210) of the case main body (10). A first filter (40) is provided at the lower part of the case main body (10). The first filter (40) is formed by a net body through which gas containing oily smoke can be passed and has first grooves (41) which are extended in a rotation direction of the fan (32) and end portions of which are open in the exhaust gas passage (14). A second filter (50) is provided inside the first filter (40). The second filter (50) is formed by a net body through which gas containing oily smoke can be passed and has second grooves (51) that are larger than the first grooves (41) and are open in the exhaust gas passage (14). The gas sucked by the fan (32) through the exhaust gas suction opening (15) is caused to flow along each of the second grooves (51) and of the first grooves (41), so that oily smoke is liquefied and collected.

Description

Akira Itoda Fan Range hood fan with built-in filter

The present invention relates to a gas containing oily fumes generated when cooked in a cooking device such as a pan or a frying pan (including steam and exhaust gas in a gas range) through an exhaust duct. This is related to fans used in range hoods for discharging air outdoors. Background art

In kitchens and kitchens, various types of cooking equipment such as pots and ply pans are used to cook and boil, so that exhaust gas from gas combustion and steam containing oil smoke and odor are released as gas. If such gas containing oily smoke is not discharged immediately to the outside, the combustion effect will be reduced and oxygen will be deficient without affecting people, and the interior of the room will be polluted by the oily smoke. Become. For this reason, in general, such gas containing oily fumes is discharged by a ventilation fan, or is sucked through a range hood arranged above a cooker and discharged from an exhaust duct by a blower. It has been done. In particular, the exhaust method using a range hood can be used in a so-called system kitchen because the range hood can guide gas containing oily smoke more efficiently than using a ventilation fan. is there. Moreover, if the range hood is placed close to the place where gas containing oily smoke is generated, the gas containing oily smoke can be reliably discharged, which is a highly advantageous exhaust method. However, in the conventional exhaust method using such a range hood, the first problem that noise is generated during the operation, and the problem in the opening of the exhaust duct and the inside of the device or exhaust duct. The second problem of treating oil fumes, which cause contamination of nearby outer walls, has not been solved. First, considering the first noise problem, a typical range hood is large enough to enclose the periphery of a cooker, but it is necessary to discharge gas including oil smoke that has been sucked from it. Since the exhaust duct has a limited size of only about 15 c in diameter and an exhaust duct of 220, the blower must be large enough to easily generate noise and contains oil smoke. It is thought that the gas hits various places in the ventilation path and generates noise. In addition, when gas containing oily smoke is sucked by an aspirator, if there are complicated obstacles in the path of the gas containing oily smoke, this not only increases the suction resistance and lowers the suction efficiency, but also reduces the aforementioned noise. It is a cause of occurrence. More specifically, since the diameter of the exhaust duct must be guided to the wall or the ceiling and opened outside, it is very small compared to the open area of the range hood as described above. In order to draw and discharge gas containing oily smoke toward the small-diameter exhaust duct without obstacles, some measures must be taken. In particular, in a kitchen or the like in which an air supply device separate from the exhaust device is installed, an exhaust device with a capacity of about 400 m ³ / h is sufficient if only exhaust gas is emitted, If you want to discharge too much, a capacity of about 50 O m ³ ,]! Is required. However, there are few kitchens that have a separate air supply device. Therefore, if an exhaust device that can sufficiently discharge oil smoke is required, it must have a capacity of up to about 70 OmSZh. If the exhaust system with such a large capacity is used to exhaust air from an exhaust duct with a diameter of about 15 cm, the above-mentioned noise will inevitably be generated. For this reason, it is conceivable to use a so-called sirocco fan as a device with large displacement and low noise. Including the hood, it has a considerably large volume.If this is to be installed in a small-volume range hood or other parts, the design configuration of the entire range hood and system kit must be changed significantly. No. However, design changes, including changes in the volume of range hoods, etc., are currently almost impossible in limited kitchen space, and consequently even high-performance sirocco fans cannot be used or adopted as is. It is. For this reason, the present inventor has studied how to minimize the generation of noise while taking full advantage of the exhaust method using a range hood, that is, how to provide an exhaust device that can solve the first problem. As a result of various studies, the inventors proposed the invention disclosed in Japanese Patent No. 2609280. The already proposed invention is as follows.

"An exhaust device for sucking gas containing oil smoke discharged from a cooker or the like disposed in a kitchen or a cooking place through the range hood 11 and discharging the gas to the exhaust duct side. A ventilation box that is placed in the range hood or above and below to communicate with the exhaust duct and that is placed in the storage box that houses the exhaust duct, and that is connected to the exhaust duct; And a connecting box that is connected to the exhaust duct side and has a small diameter toward the exhaust duct, and a ventilation duct is provided substantially in the center of the ventilation box. By disposing a partition wall having an inclined surface that is inclined toward the center, a pair of ventilation paths having a small diameter while the exhaust side is inclined toward the exhaust duct is provided. To And a sirocco fan attached to each drive shaft and housed in each air passage, and the blades of each sirocco fan are suctioned. Drive mode from the hole side Exhaust device characterized by being inclined so as to have a smaller diameter toward the data side ". The exhaust device already proposed by the present inventor in Japanese Patent No. 2609280 is the above-described first problem. However, subsequent examinations revealed that the second problem of oil and smoke could still be insufficient. Next, considering the second problem related to oil smoke, in a general range hood, for example, as shown in Fig. 1, a filter 230 is disposed inside the hood body 210. Then, the oil smoke directly sucked by the filter 230 is liquefied to be collected as oil droplets. However, it is impossible to collect all of the oil smoke by the filter 230 arranged in the hood body 210, and the remaining oil smoke is generated by a general filter located downstream of the filter 230. The air is sucked by the range hood fan, and the blades and the like constituting the range hood fan are soiled. It is difficult to clean the general range hood fan inside the filter 230, and it is almost impossible to clean the internal blades constituting the range hood fan. For this reason, when the oil droplets adhering to each blade gradually accumulate, the function of the range hood fan itself may be impaired. For this reason, Japanese Unexamined Patent Application Publication No. 2000-104969 proposes "fan casing for a multi-blade fan having a simple structure that improves the oil collecting performance". As shown in Fig. 12, this fan casing expands the contact area of the wind not only on the inner surface of casing 1 but also on the front and back sides of air guide 4 provided in casing 1. "Fan casing with improved efficiency in capturing oil and fat and without clogging can be provided at a low cost with a simple structure without processing the body and left and right plates." (Description of paragraph 0 21)). However, as described above, the contact of the wind (gas containing oil smoke) not only with the inner surface of the casing 1 but also with the air guide 4 provided in the casing 1 is considered to be a cause of noise, and the aforementioned It is thought that the noise problem 1 cannot be solved. Of course, paragraph 0 0 1 1 of the above publication states that “the entrance edge 4 ′ of the air guide 4 is an inclined edge, a jagged edge, or the like so as to shift the timing of the wind collision at the time of inflow. Entrance edge 4a 'Prevents noise generation due to simultaneous collision over the entire length.'However, even if noise is prevented only at the entrance, it is only a part of the long air guide 4, It is considered that the noise control effect can hardly be expected. In addition, it is unlikely that a simple flow of gas containing oil smoke on the surface of the flat air guide 4 would be enough to collect or capture oil smoke, and the second problem of oil smoke was sufficiently solved. It is a technology that is unlikely to be considered. In addition, Patent Publication No. 3 009 649 states that “a range hood that can improve the efficiency of capturing oil and fat without increasing pressure loss and that prevents oil and fat from flowing out to the duct side. A “range hood” as shown in Fig. 13 has been proposed with the purpose of “providing”. In the conventional range hood shown in Fig. 13, in order to achieve the above object, "an inner surface side of a fan casing accommodating a fan of a blower provided in the hood has an uneven surface." In particular, as described in claim 4, "the unevenness of the body portion alternates so as to cross the flow direction of the wind (gas containing oil smoke) caused by the rotation of the fan. It is formed continuously. " In such a case, the gas containing oil smoke sucked into the fan casing will collide with the above-mentioned uneven surface, and the oil smoke may be trapped by this. However, the conventional example shown in FIG. As described above, it is thought that noise is generated by the collision of the wind with the uneven surface. Therefore, the inventor of the present invention can take advantage of the exhaust method using the range hood, and at the same time, can reduce the generation of noise extremely, and how to effectively collect the oil smoke. As a result of various studies on the above, the present invention was completed. That is, it is natural that the object of the present invention is to sufficiently collect the oil smoke that could not be collected by the general filter on the upstream side. An object of the present invention is to provide a fan 100 for a range hood which does not generate noise even when gas containing the gas flows. Disclosure of the invention

The present invention has been made on the basis of the above circumstances.First, means adopted by the invention described in claim 1 are denoted by the reference numerals used in the description of the best mode described below. To explain,

“The boiler-cooking pan, frying pan, or other cooker 300 is used to collect the gas containing oil smoke rising from the food container 210 by the hood body 210, and the gas containing the oil smoke is discharged from the exhaust duct 220 to the outside. A range hood fan 100 that is used in the range hood 200 that discharges to the

The range hood fan 100 is partially connected to the exhaust duct 220 to form a case body 10 forming an exhaust passage 14 therein, and a partition wall 12 inside the case body 10. A fan motor 30 supported and having a fan 32 on a rotating shaft 31 and an exhaust suction port 15 formed in a portion of the case body 10 that opens into the hood body 210 Along with

Inside the lower part of the case body 10, there are provided a plurality of first grooves 41 which are formed by a mesh body through which the gas can pass, extend in the rotational direction of the fan 32, and open at the end into the exhaust passage 14. A first filter 40 is disposed, and a net that is permeable to the gas is formed inside the first filter 40, and is larger than the first groove 41 and has an end formed in the exhaust passage 14. A second filter 50 having a plurality of opening second grooves 51 is arranged. do it,

By flowing the gas containing the oil smoke sucked from the exhaust suction port 15 by the fan 32 along the second groove 51 and the first groove 41, the first filter 40 and the second filter 50 are formed. Characterized in that the oil smoke in the gas is liquefied and collected by the method described above.

It is. That is, as shown in FIGS. 8 to 10, the range hood fan 100 has a first filter 40 formed of a mesh on the inner surface of the lower inner portion of the case main body 10 as shown in FIGS. The first filter 40 and the second filter 50 have a first groove 41 and a filter 230, respectively. In particular, in the range hood fan 100 of the present invention, the first groove 41 on the second filter 50 side is made larger than the first groove 41 on the first filter 40 side, whereby the first As shown in FIG. 0, each first groove 41 completely penetrates into the second groove 51 so that the first filter 40 and the second filter 50 form a portion where they contact each other. It is. When the fan motor 30 rotates, the fan 3 2 attached to the rotating shaft 3 1 rotates, and the range hood fan 100 configured as described above rotates. Gas containing oil smoke collected by the hood body 210 of the range hood 200 starts to be sucked from the exhaust suction port 15 formed in the case body 10 of FIG. At this time, some of the oily smoke in the gas including the oily smoke is primarily captured by the filter 230 provided in the hood body 210, and by the time it reaches each exhaust suction port 15, It is getting less but not completely gone. As described above, the gas including the oil smoke sucked from each exhaust suction port 15 by the rotation of the fan 32 is discharged into the exhaust passage in the case body 10 as shown by a white arrow in FIG. At this time, most of the gas including oily smoke flows through the first filter 40 and the second filter as shown by the white arrow at the left end in Fig. 9. Evening gas enters the inside from the left end in the figure at 50, and the remaining gas containing oil smoke flows along the surface of the second filter 50 (the surface on the side of the fan 32). Of course, since each of the first filter 40 and the second filter 50 is formed of, for example, a metal mesh, the gas containing the oily smoke flowing through the first filter 40 and the second filter 50 passes through each mesh. It passes well from the inside to the outside of the two filters 50 and vice versa. The gas containing oil smoke flowing on or passing through the surfaces of the first filter 40 and the second filter 50 as described above naturally contacts or passes through the respective meshes of the first filter 40 and the second filter 50. Therefore, the oily smoke contained in the gas is liquefied and trapped by the first filter 40 or the second filter 50. The captured oil smoke is stored in the oil reservoir 21 provided at the bottom of the case main body 10 by the range hood fan 100 shown in the best mode described later. What is important is that when the gas containing oily smoke comes into contact with the surfaces of the first filter 40 and the second filter 50 or passes through these meshes, no loud noise is generated, and the range hood is not affected. The fan 100 is not a source of noise. The first reason is the smooth flow of gas containing oil smoke caused by the first groove 41 and the second groove 51 formed in each of the first filter 40 and the second filter 50. The reason 2 is that each of the first filter 40 and the second filter 50 is a literal filter having a mesh. The first reason will be described in more detail. The first groove 41 of the first filter 40 and the second groove 51 of the second filter 50 are, as shown in FIG. Since it is recessed along the flow direction of the gas containing oil smoke indicated by, as shown in Fig. 10, the flow of gas containing oil smoke is Nothing allows the smooth passage of gas, including oily smoke. Also, since the second groove 51 on the second filter 50 side is formed larger than the first groove 41 on the first filter 40 side, as shown in FIG. 5 The first groove 4 1 is inserted into 1 Thus, the second filter 50 is in close contact with the first filter 40. For this reason, even if it receives the force of the gas containing oil smoke, neither the second filter 50 nor the first filter 40 vibrates and does not generate noise. Further, the second reason is described in more detail. Since each of the first filter 40 and the second filter 50 is a filter having a mesh, the flow of gas containing oily smoke is reduced by the first filter 40. It freely enters and exits the inside and the outside of the second filter 50 and the first filter 40 and the second filter 50 are sources of sound in the flow of gas containing oil smoke. Such a large resistance does not occur at all. Further, even if turbulence occurs in the flow portion of the gas containing oil smoke, the turbulence is rectified and eliminated by the meshes of the first filter 40 and the second filter 50, and the noise due to the turbulence is reduced. There is no outbreak. By the above, each of the first filter 40 and the second filter 50 does not generate noise due to the flow of the gas containing the oily smoke. By contacting the surface of the first filter 40 and the second filter 50 or passing through the mesh as described above, the oil fumes in the gas including the oil fumes are filtered by the filter 23 provided in the hood body 210. The liquid is liquefied in the same manner as in the case of 0, and flows through the first filter 40 and the second filter 50 and flows into the oil reservoir 21 or the like and is stored. Accordingly, the fan for range hood 100 described in claim 1 of the present invention is capable of suppressing the generation of noise while reducing the amount of oil smoke entering the case main body 10 through the filter 230 of the hood main body 210. As a result, most of the oily smoke in the gas containing ash is removed, and as a result, there is no oily smoke in the exhaust gas discharged from the exhaust duct 220 and the outer wall of the building is not polluted. is there. Next, the invention described in claim 2 will be described. The invention of claim 2 relates to the range hood fan 100 according to the invention of claim 1 described above. `` An opening / closing lid 20 that opens the exhaust passage 14 is provided at the bottom of the case body 10, and the first filter 40 and the second filter 50 are detachably attached to the inner surface of the opening / closing lid 20. thing"

It is characterized by the following. That is, the range hood fan 100 according to claim 2 is characterized in that the first filter 40 and the second filter 50 are provided with an opening / closing lid as shown in FIGS. 9 and 10. As shown in FIGS. 1 and 11, the opening / closing lid 20 is capable of opening and closing with respect to the case body 10 as shown in FIGS. 1 and 11. It was done. As a result of the above, in the range hood fan 100 according to the second aspect of the present invention, the opening / closing lid 20 is opened as shown in FIG. The first filter 40 and the second filter 50 can be removed from the hood main body 210. In other words, when performing maintenance such as replacement and cleaning of the filter 230 in the hood body 210, maintenance of the first filter 40 and the second filter 50 in the fan 100 for the range hood is performed. Can be performed in the same way. Accordingly, the range hood fan 100 according to claim 2 has the same function as the range hood fan 100 according to claim 1 and the first filter 4. Thus, maintenance of the 0 and the second filters 50 can be easily performed. Brief Description of Drawings

FIG. 1 is a partial longitudinal sectional view showing a kitchen in which a range hood 200 having a built-in range hood fan 100 according to the present invention is installed, and FIG. 2 is a view showing a range in the range hood 200. FIG. 3 is an enlarged right side view of the hood fan 100, FIG. 3 is a left side view thereof, FIG. 4 is a front view thereof, FIG. 5 is a rear view thereof, and FIG. Is FIG. 7 is a plan view, and FIG. 7 is a bottom view. FIG. 8 is an enlarged cross-sectional view taken along line 11 in FIG. 2, and FIG. 9 is an enlarged vertical cross-sectional view taken along line 2-2 in FIG. FIG. 10 is a partially enlarged transverse cross-sectional view showing a line 22 in FIG. 8 in an enlarged manner. FIG. 11 is a partially broken left side view showing a state in which an opening / closing lid 20 provided below the case main body 10 is opened. FIG. 12 is a longitudinal sectional view showing a conventional technique, and FIG. 13 is a longitudinal sectional view showing another conventional technique.

(Explanation of symbols)

1 0 0 Range foo

1 0 Case body

1 1 Outlet

1 2 Partition wall

1 3 Duct connection

1 4 Exhaust passage

1 5 Exhaust suction port

1 6 Damper

2 0 Open / close lid

2 1 Oil sump

2 2 Hinge

2 3 Set screw

3 0

3 1 Rotary axis

3 2 fan

3 2a blade 4 0 1st filter

4 1 1st groove

1a end

4 2 1st filter passage

5 0 2nd filter

5 1 2nd groove

5 1a end

5 2 Second filter passage

2 0 0 Range hood

2 1 0 Feed body

2 2 0 Exhaust duct

2 3 0 Filter

3 0 0

3 1 0 Gas range or induction cooker

4 1 0 Ceiling

BEST MODE FOR CARRYING OUT THE INVENTION Next, the invention of each of the above-mentioned items will be described with respect to a range hood fan 100 according to the best mode shown in the drawings. The fan 100 substantially includes all of the inventions described in the above items. FIG. 1 shows a state of a kitchen in which a range hood 200 having a built-in range hood fan 100 according to the present invention is mounted close to a ceiling 410. In this kitchen, cookers 300 such as pots and pans are heated by a gas range or electromagnetic cooker 310 installed in contact with the wall 420. Each cooker 300 The gas containing oil smoke generated from the air is captured by the range hood fan 100 according to the present invention provided in the range hood 200. This is facilitated by the suction of the body and the discharge from the exhaust duct 220 to the outside. When the gas containing oil smoke is sucked by the range hood 200, the oil smoke in the gas containing oil smoke is removed by the filter 230 provided in the hood body 210. However, the removal is not 100%, and the remaining oily smoke is sucked into the range hood fan 100 according to the present invention. As shown in FIGS. 2 to 11, the range hood fan 100 according to the present invention is partially connected to the exhaust duct 220 to form an exhaust passage 14 therein. A case body 10, a fan motor 30 supported by a partition wall 12 in the case body 10 and having a fan 32 on a rotating shaft 31, and a hood body 2 of the case body 10. An exhaust suction port 15 formed at a portion opening into the inside of the case 10 and a mesh body through which the gas can pass are formed inside a lower part of the case body 10, and a rotation direction of the fan 32. A first filter 40 having a plurality of first grooves 41 extending to the end and opening to the exhaust passage 14 is disposed, and the gas can pass through the inside of the first filter 40. It has a plurality of second grooves 51 that are formed by a mesh and that are larger than the first grooves 41 and whose ends are open to the exhaust passages 14. That it is obtained by the second filter 5 0 place. The case body 10 of the fan 100 for the range hood has a fan motor 30 and a fan 32 built therein in an airtight manner. The upper end of the case body 10 has an exhaust duct 220 that is open to the outside. There is a duct connection part 13 for connection, and the inside of the duct connection part 13 is a discharge port 11. Further, on both left and right sides of the case body 10, as shown in FIGS. 2 and 3, exhaust suction ports 15 for sucking gas containing oil smoke captured by the hood body 210 are provided. Each is open. In addition, in the outlet 11 of the case body 10, there is provided a damper 16 for shutting off the outside air entering through the exhaust duct 220. ' As shown in FIG. 1 and FIG. 11, an open / close lid 20 is provided below the case body 10 so as to be freely openable and closable. As described above, it is attached to the case body 10 by hinges 22. The opening / closing lid 20 is fixed to the case body 10 by a set screw 23 provided on the side opposite to the hinge 22. As shown in FIG. 8, a partition wall 12 is provided at the center of the case body 10, and both sides of the partition wall 12 communicate with the discharge port 11 and the partition wall 12, respectively. The exhaust passage is 14. As shown in FIG. 8, the partition wall 12 supports the fan motor 30, and the fan 32 fixed to the rotation shaft 31 of the fan motor 30 includes the partition wall 12. Are positioned so that they cannot rotate. Each fan 32 is a so-called "sirocco fan" provided with a number of blades 32a extending in the direction of the rotation axis 31 of the fan motor 30, and each blade 32a It is inclined outward toward the suction port 15. By configuring the fan 32 in this way, the suction force of the fan 32 is increased, and the generation of noise due to the sending of gas containing oily smoke is also prevented. In the range hood fan 100 according to the present invention, as shown in FIGS. 8 and 9, the first filter which is exposed to the exhaust passage 14 formed in the case body 10 is provided. 40 and a second filter 50 are provided. In the best mode, the first filter 40 and the second filter 50 are detachably attached to the inner surface of the above-described opening / closing lid 20. When maintenance is required, the opening / closing lid is used. It is removed from 20. The first filter 40 and the second filter 50 are formed of a metal mesh or a punched metal, and the mesh of the second filter 50 on the exhaust passage 14 side is connected to the first filter 40. It is larger than that of. The reason is that gas containing oily smoke passes through the second filter 50 This is to make it easier to reach the filter 40. As shown in FIG. 10, the first filter 40 adjacent to the opening / closing lid 20 is formed with a large number of first grooves 41, and these first grooves 41 and the opening / closing lid 20 are formed. A first filter passage 42 is provided between the first and second filters. As shown in FIG. 9, each of the first grooves 41 is a long one extending in the rotation direction of the fan 32, and it is assumed that the first groove 41 is unlikely to be resistant to the flow of gas including oily smoke. At the same time, the contact area with gas containing oily smoke is increased. Further, as shown in FIG. 9, both ends 41 a of each first groove 41 are open to an exhaust passage 14 formed in the case main body 10, and a gas containing oily smoke is formed. The introduction into and out of the first filter passage 42 can be performed without resistance. As shown in FIG. 10, the second fill 50 directly facing the exhaust passage 14 also has a number of second grooves 51 formed along the flow direction of the gas containing oily smoke. However, the second groove 51 is larger than the first groove 41 on the first filter 40 side. In the best mode, the first filter 40 is provided in one second groove 51. The size is such that the two first grooves 41 on the side can enter. Of course, as shown in FIG. 10, a second filter passage 52 is formed between the adjacent second grooves 51, and both ends 51a of the second filter 50 are formed. Is opened in the exhaust passage 14 as shown in FIG. 9. As a result, the second filter 50 also has the same structure as the first filter 40 described above. The second groove 51 along the flow direction of the gas containing the oil smoke reduces the resistance to the gas containing the oil smoke, and the end portions 51a allow the gas containing the oil smoke to be smoothly introduced and discharged. is there. Since both the first filter 40 and the second filter 50 have meshes, it goes without saying that gas including oily smoke can be freely moved between the two. This means that even if a turbulent flow of gas containing oily smoke occurs in the case main body 10, the turbulent flow freely moves through each mesh, so that it does not substantially become a steady turbulent flow. Then, by passing the gas containing the oil smoke through the mesh or contacting the surfaces of the first filter 40 and the second filter 50, the oil smoke in the gas containing the oil smoke is removed from the first filter 40 or the second filter 40. It is collected by the two filters 50 and liquefied. The liquefied oil smoke travels through the first filter 40 and the second filter 50, reaches the inner surface of the open / close lid 20, and is stored in the oil reservoir 21 provided therein. By the way, in the range hood fan 100 according to the best mode, as shown in FIG. 9, the exhaust gas in which the gas containing oil smoke first contacts or passes through the first filter 40 and the second filter 50 is used. The portion of the passage 14 is narrower than the portion of the exhaust passage 14 located on the rear end side of the first filter 40 and the second filter 50. As a result, the pressure of the gas containing the oil smoke is reduced in the portion of the case body 10 close to the outlet 11, so that the oil smoke in the gas is easily liquefied. The capture by the 0 and the 2nd fill 50 can be performed more reliably. On the other hand, the narrow end portions 41a and 51a of the exhaust passage 14 on the left side in FIG. 9 reduce the oil smoke sent by each fan 32. Most of the contained gas enters the first filter passage 42 of the first filter 40 and the second filter passage 52 of the second filter 50. Industrial Applicability '' The range hood fan 100 according to claim 1 configured as described above has a first filter 40 and a second filter 50 inside the bottom of the case body 10. At the same time, a large number of first and second grooves 41 and 51 were formed along the flow direction of the first grooves 41 at the first and second fills 40 and 50, respectively. Oil fumes that could not be removed by the second groove 51 on the main body 210 side can be trapped, and are discharged outdoors from the exhaust duct 220 connected to the fan 100 for range hood. The oil content in the exhaust gas can be reduced as much as possible. By installing the range hood fan 100 according to the present invention, the exhaust The dirt due to oil hardly adheres to the outdoor wall where the gate 220 opens, and the building can be kept beautiful. According to the range hood fan 100 of the second aspect of the present invention, the same effect as the range hood fan 100 of the first aspect can be exhibited. Since the first filter 40 and the second filter 50 are detachably provided on the inner surface of the opening / closing lid 20 provided below the main body 10, the cleaning of the first filter 40 and the second filter 50 is performed. In addition, maintenance such as replacement and replacement can be easily performed, and the durability of the range hood fan 100 can be further improved.

Claims

Sought

1. Gas containing oil smoke rising from a cooker (300) such as a pan or frying pan is collected by the hood body (210), and the gas containing oil smoke is discharged to an exhaust duct (220). A range hood (100) that is used in a range hood (200) that is discharged outside from a hood, and is stored in a hood body (210);

The range hood fan (100) is partially connected to the exhaust duct (220) to form an exhaust passage (14) inside, and a case body (10) inside the case body (10). The fan motor (30), which has a fan (32) on the rotating shaft (31), supported by the partition wall (12), and the portion of the case body (10) that opens into the hood body (2 10) It is constituted by an exhaust suction port (15) formed, and is formed by a mesh body permeable to the gas inside the lower part of the case body (10), and extends in the rotation direction of the fan (32), and has an exhaust passage formed at an end thereof. A first filter (40) having a plurality of first grooves (41) opened in (14) is arranged, and a net formed through the first filter (40) is formed by a mesh that can transmit the gas. A plurality of second grooves (51) which are larger than the first grooves (41) and whose ends are open to the exhaust passage (14). Second by arranging a filter (50) having,

By flowing the gas containing the oil smoke sucked from the exhaust suction port (15) by the fan (32) along each of the second groove (51) and the first groove (41), the first filter ( 40. A range hood fan (100) characterized in that the oil smoke in the gas is liquefied and collected by the second filter (50) and the second filter (50).

2. An opening / closing lid (20) for opening the exhaust passage (14) is provided at the bottom of the case body (10), and the first filter (40) and the second filter (50) are provided on the inner surface of the opening / closing lid (20). The range hood fan (100) according to claim 1, wherein the fan is detachably mounted.