JP3737851B2 - Forced supply / exhaust range hood fan - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a forced supply / exhaust range hood fan that is installed above a cooking utensil such as a gas range, sucks oily smoke and odor generated by cooking, exhausts it outdoors, and supplies outdoor air indoors. It is about.
[0002]
[Prior art]
A range hood fan is installed above the cooking utensil in order to suck out oil smoke and odor generated when cooking with a cooking utensil such as a gas range installed in the kitchen and exhaust it outside.
The range hood fan is forced to supply fresh outdoor air into the room with a blower to prevent negative pressure in the room due to exhaust as the house becomes airtight and to prevent oxygen deficiency. There is an exhaust type.
The exhaust side duct joint and the air side duct joint attached to the forced air supply / exhaust type range hood fan are provided with an exhaust shutter and an air supply shutter that prevent outside air from flowing into the room through the range hood fan. There are two types, a wind pressure type in which the shutter is opened by the difference in pressure between the wind pressure and exhaust air generated by the operation of the blower, and an electric type in which the shutter is forcibly opened and closed by a motor.
The former wind pressure shutter type has a simple structure and has the advantage of keeping the equipment cost low.
On the other hand, in the electric shutter type, both the exhaust shutter and the air supply shutter are opened in conjunction with the operation of the blower, and the exhaust is exhausted outdoors, and at the same time fresh outdoor air is introduced indoors, and the blower is not in operation. Since the shutter is forcibly closed and the exhaust passage and the air supply passage are closed securely and airtightly, the shutters are used when the blower is not in operation, such as the range hood fan having the air pressure type exhaust shutter and the air supply shutter. There is no cold draft where cold outdoor air enters the room due to a temperature difference from the room due to the fluttering, and there is an advantage that the kitchen can be used comfortably.
[0003]
[Problems to be solved by the invention]
As such a forced supply / exhaust range hood fan, the present applicant has already proposed a technique disclosed in Japanese Patent Application No. 7-180873.
As shown in FIG. 7, the previously proposed one accommodates in a fan casing 11 a double-sided suction type multi-blade fan 21 divided into two axially by a power transmission plate 21a provided vertically in an intermediate portion. A partition 11d provided on the extension of the power transmission plate 21a partitions the front exhaust chamber 100 and the rear air supply chamber 200, and the front opening of the fan casing 11 is a suction port 11h to the exhaust chamber 100 and a rear opening. Is attached to the top plate 32 so that the suction port 11e on the front side of the fan casing 11 communicates with the exhaust duct joint 300 on the top plate 32 of the hood body 2. An air supply chamber 5 that communicates with a suction port 11 c into the air supply chamber 200 is provided between the back plate 12 and the fan casing 11.
The air supply chamber 5 is connected to the air supply duct 4 via an air supply duct joint 400 provided on the top plate 32, and formed on the top plate 32 via a discharge port 11f on the rear side of the fan casing 11. The air is supplied into the room through the slit 32a.
The previously proposed one can supply / exhaust with a single fan and a single fan casing, thereby reducing the manufacturing cost.
However, the inner diameter of the air supply duct 4 is generally 150 mm or more, and the air supply chamber 5 connected via the air supply duct joint 400 naturally needs to have a depth dimension of 150 mm or more. In order to reduce the smoke capturing space in the hood that is positioned in front and secured in front of the blower 1, and to ensure a sufficient space for capturing the smoke, the above-mentioned dimensions of the range hood fan are necessarily increased. There is a problem that gets bigger.
In order to prevent this, as shown in FIG. 8, a connection duct 9 is provided on the top plate 32 of the hood body 2 as an intermediate connection body, and the air supply duct 4 is connected to the connection duct 9 via an air supply duct joint 400. If the air supply chamber 5 is connected to the connection duct 9, the depth dimension of the air supply chamber 5 can be reduced.
However, because the connection duct 9 is provided on the top plate 32 of the hood main body 2, the air supply duct joint 400 is positioned higher than that, and the top plate 32 of the hood main body 2 and the room (kitchen). As a result, it becomes necessary to secure a high construction space H for duct piping between the ceiling of the house and it becomes impossible to meet the needs of today's apartment houses (condominiums, etc.) that keep the floor height small, There is a possibility that it cannot be installed at a predetermined height in buildings with protruding objects.
When supplying air to the air supply chamber 200, in addition to the air supply chamber 5, a connection duct 9 for communicating the air supply duct joint 400 with the air supply chamber 5 must be provided on the top plate 32 of the hood body 2. In addition, the structure becomes complicated and the equipment cost increases.
Further, since the installation position of the air supply duct joint 400 is determined at one place, there is a problem that the opening 500 for connection to the air supply duct 4 cannot be freely selected depending on the piping direction of the air supply duct 400. Yes, the workability of the air supply duct was not good.
[0004]
The present invention has been made in view of the conventional circumstances, and an object of the present invention is to provide an air supply chamber that makes use of the space in the hood main body and forms a wide wall of the top plate of the hood main body. By forming it, the air supply duct joint can be directly attached to the hood body, reducing the space for capturing flue gas, or creating a construction space for duct piping secured on the top plate of the hood body without increasing the size The object is to reduce the size and simplify the air supply structure to the blower.
Still another object is to enable the air supply duct to be installed in an optimum direction according to each installation site.
[0005]
[Means for Solving the Problems]
The technical means taken in order to achieve the above-mentioned object is as follows. Claim 1 is a housing in which a blower is housed and disposed, and the blower is divided into two axially by a power transmission plate provided vertically in an intermediate portion. The double-sided suction type multi-blade fan and a partition wall provided at a position corresponding to the two-divided position of the multi-blade fan are divided into a front exhaust chamber and a rear air supply chamber, and the front of the exhaust chamber And a fan casing provided with a suction port to the air supply chamber on the rear surface, and an air supply chamber for accommodating the fan casing is provided, and the air supply chamber has a wall constituting the top plate of the hood body. A front-side open type box portion that accommodates the fan casing, and a closing plate portion that closes the opening portion of the box portion together with the opening portion of the front surface of the fan casing, and the exhaust plate is provided in the closing plate portion. Correspondingly provided suction port The gist of the invention is that the discharge part of the fan casing is attached to the exhaust duct joint on the top plate of the hood main body, and the supply duct joint is attached to the top plate portion of the hood main body that constitutes one wall part of the air supply chamber. .
According to a second aspect of the present invention, the area of the top plate portion of the hood main body which constitutes one constituent wall portion of the air supply chamber according to the first aspect is such that the area of the air duct is connected around the exhaust duct joint and the fan casing discharge section. It is ensured that it is possible to provide a plurality of indicator portions for forming a connection opening, and a connection opening formed based on an arbitrary indicator portion among a plurality of indicator portions provided on the one wall portion. The gist of the present invention is that the air supply duct joint is attached to the main body.
Furthermore, the gist of claim 3 is that the indicator part of claim 2 is a half cut.
[0006]
According to the above technical means, there are the following actions.
The front plate of the hood main body is formed as a constituent wall portion and is supplied with a front open type box portion that houses the fan casing, and a closing plate portion that closes the open portion of the box portion together with the open portion of the front surface of the fan casing. A chamber is formed.
For this reason, a wide range of the top plate in the hood body faces the inside of the air supply chamber, and the top plate portion around the mounting portion between the discharge port of the fan casing and the exhaust duct joint for connecting the exhaust duct is connected to the air supply chamber. It is possible to attach a large-sized air supply duct joint to communicate.
Further, when the air supply duct joint can be directly mounted on the top plate of the hood main body, it is possible to cope with a simple structure that covers the fan casing with an air supply chamber composed of a box portion and a closing plate portion.
In addition, in order to pipe the air supply duct in the optimum direction according to the installation site by selecting from a plurality of indicator parts provided at appropriate places on the top plate of the hood body facing the inside of the air supply chamber Can be formed.
In addition, when the indicator portion is half cut, the connection opening can be easily formed at the installation site of the range foot fan.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Next, embodiments of the present invention will be described with reference to the drawings.
1 to 6 show the present embodiment, where reference numeral 1 is a forced air supply type blower, 2 is a hood body that houses the blower 1, 3 is an exhaust duct, and 4 is connected to an air supply chamber 5. Oil smoke, odor, etc. generated by cooking are discharged from the blower 1 to the outside through the exhaust duct 3 and fresh outdoor air is blown from the supply duct 4 through the supply chamber 5. Air is supplied into the room from the apparatus 1.
[0008]
The blower device 1 includes a fan casing 11 and a multiblade fan 21 accommodated in the fan casing 11, and a motor 31 that drives the multiblade fan 21 is fixed to the outside of the fan casing 11.
[0009]
The fan casing 11 has a well-known volute shape, and the front surface in the axial direction is left open (completely open), and the rear surface is covered with a rear plate 11a which is formed by bending a bell mouth 11b to form a suction port 11c. In addition, a partition wall 11d is provided vertically in the middle portion, the front side is an exhaust chamber 100, the rear side is an air supply chamber 200, and the mouth portions of the two discharge ports (discharge portions) 11e and 11f protruding upward are the hood body. It is fixed to the top plate 32 of 2 in a suspended form.
[0010]
The multi-blade fan 21 has disk-like lower plates 21d and 21d portions of two fan portions 21b and 21c arranged back to back, and a power transmission plate 21a is interposed between the lower plates 21d and 21d so A suction structure is formed.
The multi-blade fan 21 is housed so that the power transmission plate 21a is located in the vicinity of the partition wall 11d, with the exhaust fan part 21b in the first half part and the air supply fan part 21c in the second half part. A boss 21a 'fixed to the center of the power transmission plate 21a is connected to the shaft 31a of the motor 31 fixed to a cross-shaped mounting leg 11g protruding from the rear plate 11a by connecting with a nut member 6 from the indoor side. In the fan casing 11, an exhaust fan portion 21b is accommodated in the exhaust chamber 100, and an air supply fan portion 21c is accommodated in the air supply chamber 200.
[0011]
The hood body 2 includes a back plate 12, a side plate 22 fixed to the left and right edges of the back plate 12 by appropriate means such as welding and screwing, and appropriate means such as welding and screwing to the upper edge of the back plate 12 and the side plate 22. The top plate 32 fixed at the side, the partition plate portion 42 obliquely provided between the left and right side plates 22, 22, the filter 52 attached after the air blower 1 and the air supply chamber 5 are assembled, the front plate 62, etc. And installed at a predetermined height of the chamber wall.
Reference numeral 72 is a curtain.
[0012]
The air supply chamber 5 is provided so as to cover the fan casing 11, and includes a horizontally long box portion 15 and a closing plate portion 25.
[0013]
The box portion 15 has a rectangular shape in a front sectional view that opens the front side, and a mounting flange 15b that is bent at the upper end of a horizontally long frame 15a that has a U-shape facing upward as shown in the figure. A mounting flange 15c bent at the rear end of the top plate 32 is fixed to the same back plate 12 by appropriate means such as welding or screwing, and the fan casing 11 is accommodated therein.
[0014]
The closing plate portion 25 is suspended from the top portion 32 of the hood body 2 corresponding to the opening portion of the front side of the fan casing 11 with an upper end fixed by appropriate means such as screwing. Both the front open edge and the front open edge of the fan casing 11 are fixed by appropriate means such as screws, and the communication between the open part of the box part 15 and the open part of the front face of the exhaust chamber 100 (exhaust passage and supply air). The communication with the air passage is blocked.
As a result, the air supply chamber 5 communicating with the suction port 11c of the air supply chamber 200 around the fan casing 11 is formed with the wide portion of the top plate 32 of the hood body 2 as one constituent wall portion.
[0015]
The closing plate portion 25 is provided with an opening 25c at a portion facing the exhaust chamber 100, and a bell mouth 25a is detachably attached thereto to form a suction port 25b. 21 can be removed.
[0016]
An exhaust duct joint 300 is attached to the top plate 32 of the hood body 2 so as to communicate with the discharge port 11 e of the fan casing 11. The exhaust duct joint 300 is connected to the exhaust duct joint 300, and one of the air supply chambers 5 is connected. An air supply duct joint 400 can be attached by using a wide top plate 32 portion serving as a constituent wall portion.
[0017]
In the hood body 2, the area of the top plate 32 that is a constituent wall of the air supply chamber 5 is such that the frame 15 a is horizontally long in the present embodiment. In order to be able to attach the air supply duct 4 having a width of about 150 mm to a plurality of locations by using the wide top plate 32 portion which is a constituent wall portion of the air supply chamber 5 and is widened with almost the entire width of the plate 32. A plurality of indicator portions 7 for connection openings 500 for attaching an air supply duct joint 400 provided with the electric shutter 8 are provided at appropriate positions on the left and right sides of the attachment portion of the exhaust duct joint 300.
[0018]
The indicator portion 7 is half cut, and the connection opening 500 can be easily formed at an optimum position depending on the piping direction of the air supply duct 4 at each installation site.
[0019]
When the box portion 15 is formed, the left and right parallel surfaces 15d and 15d of the frame 15a may be constituted by the left and right side plates 22 and 22 of the hood body 2.
In this way, not only the structure is simplified, but also the entire width of the top plate 32 of the hood body 2 becomes a constituent wall portion of the air supply chamber 5, so that the air supply duct 4 is increased by increasing the number of the indicator portions 7. The selection of the connection opening 500 with respect to the piping direction can be expanded.
[0020]
Accordingly, in the forced supply / exhaust range hood fan of the present embodiment, when the blower 1 is operated, the electric shutter 8 is opened, and the exhaust gas is sucked into the exhaust chamber 100 through the filter 52 to discharge the fan casing 11. 11e is exhausted from the exhaust duct 3 to the outside, fresh outdoor air is supplied to the supply duct 4, the supply duct joint 400, the supply chamber 5 to the supply chamber 200, and the discharge port of the fan casing 11 Air is supplied into the room through a slit 32a formed in the top plate 32 of the hood body 2 through 11f.
At this time, since the air supply chamber 5 is formed by the box portion 15 and the closing plate portion 25 as described above, the air supply chamber 5 contains the fan casing 11 as shown in the figure, and the hood main body in plan view. The top plate 32 of the 2 becomes a horizontally long shape facing almost the entire width.
Therefore, the top plate 32 portion of the hood body 2 facing the air supply chamber 5 is naturally widened, and a large diameter (150 mm) air supply that communicates with the air supply chamber 200 by using the margin around the exhaust duct joint 300. Duct joint 400 can be installed directly.
Further, as a result of providing a plurality of indicator portions 7 at appropriate positions using the wide blank portion of the top plate 32 of the hood body 2 facing the air supply chamber 5, the connection opening 500 can be formed at the selected position. Thus, the air supply duct 4 can be piped in the optimum direction according to the installation site.
[0021]
In claim 1, the box portion 15 does not necessarily have a horizontally long shape over substantially the entire width of the top plate 32 of the hood main body 2, and may have a minimum size capable of accommodating the fan casing 11. Is. Even in this case, a large-diameter (150 mm) air supply duct joint 400 that communicates with the air supply chamber 200 by using a blank portion around the exhaust duct joint 300 can be directly attached.
In the first aspect, the indicator portion 7 may be a simple mark. In this case, the connection opening 500 is formed by using a dedicated tool at the factory or installation site.
In the present invention, the air supply duct joint may have a wind pressure shutter.
[0022]
【The invention's effect】
In the present invention, the air supply chamber that houses the fan casing is formed with the top plate of the hood main body as one constituent wall portion, and the top plate that faces the air supply chamber is widened. An air supply duct joint for connecting the air duct can be directly attached to the top plate of the hood body to communicate with the air supply chamber.
Therefore, in the forced air supply / exhaust range hood fan that achieves the advantage of reducing the manufacturing cost by enabling supply / exhaust with one fan and one fan casing, the exhaust gas capturing space secured in front of the blower is provided. In addition to ensuring a sufficiently wide range to obtain the required smoke capture efficiency, the installation space for the duct (exhaust and air supply) piping to be secured on the top plate of the hood body is reduced, It can be installed at a predetermined height in a room with projections such as beams, and can be made suitable for today's apartment houses (condominiums, etc.) that keep the floor height small.
In addition, the air supply duct joint can be directly mounted on the top plate of the hood body by simply covering the fan casing with the air supply chamber with a simple structure consisting of a box part and a closing plate part. Provided inside the main body and further connected to the air supply chamber and the air supply duct joint on the top plate of the hood main body, the structure is not complicated and the manufacturing cost is low. Not only can this contribute, but the outer surface of the fan casing is not exposed to the flue gas, so it is not easily soiled and the fan casing is easy to clean.
In addition, the top plate portion of the hood body facing the air supply chamber is provided with a plurality of indicator portions for forming an opening for connecting the air supply duct joint around the attachment portion between the exhaust duct joint and the discharge portion of the fan casing. Since the area that can be installed is secured, a connection opening that pipes the air supply duct in the optimum direction according to the installation site is selected by selecting from a plurality of indicator parts provided there. it can.
Furthermore, when the index portion is half-cut, the forming operation of the connection opening can be performed very easily at the installation site, and the workability is good.
[Brief description of the drawings]
FIG. 1 is a partially cutaway side view showing a use state.
FIG. 2 is a sectional view taken along line (2)-(2) in FIG.
3 is a cross-sectional view taken along line (3)-(3) of FIG.
FIG. 4 schematically shows a plan view of a range hood fan.
FIG. 5 is a perspective view showing a relationship between an air supply chamber and a blower.
FIG. 6 is an exploded perspective view showing the relationship between an air supply chamber, a blower, and a hood body.
FIG. 7 is a partially cutaway side view of a conventional forced supply / exhaust range hood fan.
FIG. 8 is a partially cutaway side view of another conventional forced supply / exhaust range hood fan.
[Explanation of symbols]
2: Hood main unit 1: Blower
21a: Power transmission plate 21: Multi-blade fan
11d: Bulkhead 100: Exhaust chamber
200: Air supply chamber 11c: Air inlet 5: Air supply chamber 32: Top plate
15: Box part 25: Closing plate part
11e, 11f: Discharge port (discharge part) 300: Exhaust duct joint
400: Air supply duct joint 500: Connection opening 7: Indicator part 8: Electric shutter
12: Back plate 15a: Frame
11: Fan casing 22: Left and right side plates

Claims (3)

A blower is housed and disposed in the hood body, and the blower is divided into two in the axial direction by a power transmission plate vertically provided at an intermediate portion, and a two-split of the multiblade fan. A fan casing that is divided into a front exhaust chamber and a rear air supply chamber by a partition wall provided at a position corresponding to the converted position and opens the front surface of the exhaust chamber and provides a suction port for the air supply chamber on the rear surface. And an air supply chamber that accommodates the fan casing, the air supply chamber being formed with the top plate of the hood main body as one constituent wall portion, and a front open type box portion that accommodates the fan casing; A closing plate portion that closes the opening portion of the box portion together with the opening portion of the front surface of the fan casing, the suction opening portion is provided in the closing plate portion corresponding to the exhaust chamber, and the discharge portion of the fan casing is connected to the top of the hood main body. Exhaust on board Is attached to the transfected catch, forced air supply and exhaust type range hood fan, characterized in that fitted with air supply duct catch the top plate portion of the hood body, which is one configuration wall portion of the air supply chamber. An indicator portion for forming an opening for connection of the air supply duct joint around the mounting portion of the exhaust duct joint and the discharge portion of the fan casing where the area of the top plate portion of the hood main body which constitutes one constituent wall of the air supply chamber The air supply duct joint is attached to a connection opening formed on the basis of an arbitrary index portion among the plurality of index portions provided on the one wall portion. The forced air supply / exhaust range hood fan according to claim 1. 3. The forced air supply / exhaust range hood fan according to claim 2, wherein the indicator portion is a half cut.

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