JPH0350336Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention relates to a range hood, specifically a range hood that is capable of air supply and exhaust and effectively releases combustion exhaust gas, steam, oil smoke, etc. generated during cooking to the outdoors. It is something.

<Prior art> In general, range hoods include (a) an exhaust hood installed on the upper part of the rear wall of the range, and an exhaust fan that collects high-temperature combustion exhaust gas, steam, oil smoke, etc. (hereinafter referred to as high-temperature hot air);
(b) Types in which high-temperature hot air is discharged outdoors using an exhaust fan installed at the lower part of the rear wall through an exhaust duct that has an exhaust intake hole near the range are well known.

<Problems to be solved by the invention> However, with the above method (a), the noise from the exhaust fan easily enters the kitchen, and because it does not have an insulating and fireproof structure, it cannot be used from the stovetop according to the Fire Service Act. It was used by being installed at a certain height or higher. As a result, the suction power of the exhaust fan was reduced, making it impossible to sufficiently collect high-temperature hot air, and the rear wall surface was easily contaminated by high-temperature hot air.

In addition, since the type (b) is a horizontal suction type, when a four-burner stove is placed on a stovetop, it is difficult to sufficiently collect the high-temperature hot air that is generated when cooking on a stove far from the exhaust air intake hole. Therefore, if the suction power of the exhaust fan is increased, the flame of the stove will flutter in the direction of the exhaust intake hole, making it impossible to evenly heat the objects to be heated (pots, pots, etc.), resulting in poor thermal efficiency. I was getting used to it. Furthermore, when using a stove with a low flame, there was a risk that the flame would go out, which was dangerous. Additionally, it was necessary to take heat insulation measures between the exhaust duct and the rear surface.

In addition, since the purpose of both methods (a) and (b) is to exhaust and release high-temperature hot air outdoors, it is necessary to install a separate ventilation window, etc., so that the amount of air is equal to the amount of air exhausted by the exhaust fan. Air had to be taken into the kitchen through ventilation windows, etc., resulting in a loss of heat when heating and cooling the kitchen.

This invention solves the above-mentioned problems, improves thermal efficiency, allows air to be supplied without installing a separate ventilation window, can be installed without taking separate insulation measures, and also allows high-temperature heat to be stored indoors. The purpose of the present invention is to provide a range hood that can prevent oil from being dissipated, as well as prevent oil and the like from adhering to an exhaust duct and an exhaust fan, thereby making indoors (kitchens) more comfortable.

<Means for solving the problem> The range hood according to this invention has a rear opening 3
b This is a range hood that is integrally constructed of a front panel 3 on which an air supply/exhaust duct 7 is arranged at the rear, and an upper panel 5 equipped with an air intake hole 5b for exhaust on the lower surface. Exhaust fan 8
It is composed of an inner cylinder 7a, which is provided with an air exhaust duct 10, and an outer cylinder 7b, which forms an air supply duct 11 between the inner cylinder 7a and the rear surface 3 of the front panel 3.
A gap 14 on the back side is formed by a gap forming member 4 having a plurality of ventilation holes 4a opening toward the bottom and side surfaces, respectively, at the lower end and left and right ends of a.
At the front end and left and right ends of the upper surface 5c of the upper panel 5,
A bottom gap 16 on the top side is formed by a bottom gap forming member 6 having a plurality of ventilation holes 6a opening toward the front and side surfaces, respectively, and the bottom gap 14 on the back side and the bottom gap 16 on the top side communicate with each other. The gap 14 on the back side communicates with the air supply duct 11, and a filter 1 having air permeability and closing the back opening 3b is provided in front of the back opening 3b of the front panel 3.
9 is disposed, and a door 20 is disposed in front of the filter 19 with a predetermined distance from the filter 19, thereby solving the above-mentioned problem.

<Operations and Effects of the Invention> In the range hood according to this invention, the flow of high-temperature hot air generated during cooking is controlled by the door in the direction of the exhaust fan, rises, passes through the exhaust air supply hole, and passes through the upper part of the door. and the front panel,
Furthermore, since the suction passes between the lower part of the door and the front panel, it is possible to heat pots of boiled food more uniformly and improve thermal efficiency compared to the conventional horizontal suction method.

In addition, the exhaust gas that is sucked and discharged as described above is
Since all of the exhaust gas passes through the filter, this filter absorbs oil and the like in the exhaust gas, thereby preventing oil and the like from adhering to the inner peripheral surface of the exhaust duct and the exhaust fan.

Furthermore, when high-temperature indoor air is discharged outdoors and indoors becomes negative pressure and high temperature compared to outdoors, the damper of the air supply duct opens and outside air is introduced into the air supply duct. There is no need to provide ventilation windows, ventilation fans, etc. In addition, an air supply duct is installed around the exhaust duct, which becomes hot due to high-temperature hot air, and also on the back side of the front panel and the top side of the upper panel that communicate with the air supply duct.
A certain space is formed by the intermediate forming member, and since air constantly circulates when the exhaust fan is in operation, it becomes a heat insulating layer, so there is no need to take separate heat insulation measures.

Also, outside air is blown out from the tip of the air supply duct and the side of the gap forming member, forming an air curtain, and the outside air merges to envelop the high-temperature hot air and is released outdoors, so it can be indoors. It is possible to prevent high-temperature hot air from dissipating.

<Example> An example of this invention will be described below based on the drawings.

The range hood 1 of the embodiment is integrally formed with a front panel 3 and an upper panel 5, and has a substantially L-shaped cross section.

A back opening 3b is formed in the center of the back 3a of the front panel 3, and at the rear of the back opening 3b,
A rectangular air supply/exhaust duct 7 is provided. The rear end portion of the air supply/exhaust duct 7 slightly protrudes from the wall surface 13 and is attached to a mounting hole 13a in the wall surface 13. In addition, there is a front opening 3d in the center of the front 3c.
is formed.

This supply/exhaust duct 7 is composed of an inner cylinder 7a and an outer cylinder 7b, and an exhaust fan 8 is disposed inside the inner cylinder 7a, and the inner cylinder 7a serves as an exhaust duct 10. Further, an outer cylinder 7b is disposed on the outer periphery of the inner cylinder 7a with a certain gap, and the gap becomes the air supply duct 11. A plurality of ventilation pipes 11d are arranged at predetermined positions at the front end of the air supply duct 11 so as to communicate with the front part of the front panel rear surface 3a. Outer tube 7
An air supply hole 11a and a damper 11b that opens and closes the air supply hole 11a depending on the pressure difference and temperature difference between indoors and outdoors are provided at the lower part of the portion protruding from the wall surface 13 of b.

Furthermore, at the rear end of the air supply and exhaust duct 7, there is an automatic shutter 18 that opens only when the exhaust fan 8 is in operation.
A weather cover 17 having an opening at the bottom is disposed.

Further, at the lower end and both left and right ends of the back surface 3a of the front panel 3, there are space forming members 4 having a substantially U-shaped cross section.
are fixedly placed. This gap forming member 4
is arranged so that the opening part is on the inside, and a plurality of ventilation holes 4a communicating with the outside are formed on the surface facing the opening part. When the front panel 3 is attached to the wall surface 13, the gap forming member 4 comes into contact with the wall surface 13, and the height H of the gap forming member 4 is created between the front panel rear surface 3a and the wall surface 13. A gap 14 is formed on the back side of the frame. This space 14 on the back side communicates with the air supply duct 11 via the ventilation hole 11c, and outside air flows from the air supply duct 11 and serves as a passage for the outside air. In addition, this
The spacer member 4 can also be formed integrally with the front panel 3.

Furthermore, a filter 19 that has air permeability and closes the rear opening 3b is removably disposed at the front of the front panel rear surface 3a via a cover 19a. Therefore, all the exhaust gas discharged outdoors by the exhaust fan 8 passes through this filter 19. This filter 19 absorbs oil and the like in the exhaust gas and prevents the oil and the like from adhering to the inner peripheral surface of the exhaust duct 10 or the exhaust fan 8.

In addition, in front of the filter 19, for a predetermined period of time,
The door 20 is disposed with a . This door is kept closed while the exhaust fan 8 is in operation, that is, in parallel with the front panel 3, to prevent high-temperature hot air from flowing laterally and to prevent noise from the exhaust fan 8. . In addition, filter 19
When performing replacement or maintenance, etc., it can be opened upward via the hinge 20a at the upper end, making the work easier. Note that the door 20 may be configured not only to open upwardly but also downwardly or horizontally. Reference numeral 20b denotes cylindrical magnetic catches arranged at the left and right ends of the lower end of the back surface of the door 20, respectively.

The upper panel 5 is positioned so as to protrude forward from the upper end of the front panel 3, and has an exhaust air intake hole 5b formed in the lower surface 5a. Note that 5d is a plate material or a glass-like plate material provided with a large number of slit-like holes that cover the exhaust air intake hole 5b.

In addition, at the front end and both right and left ends of the upper surface 5c of the upper panel 5, gap forming members 6 similar to the gap forming members 4 provided on the rear surface 3b of the front panel are similarly fixedly disposed. A plurality of ventilation holes 6a are formed in this spacer forming member 6 and open toward the front and side surfaces. When the upper panel 5 is attached to the hanging cabinet 15 or the like, a certain gap 16 is formed on the upper surface side by the gap forming member 6 between the hanging cabinet 15 and the upper surface side of the upper panel 5, and the front panel 3
It acts in the same way as the gap 14 on the back side formed by the gap forming member 4 between the back side and the wall surface 13. The rear end of the upper gap 16 communicates with the upper end of the rear gap 14. Reference numeral 24 is a lighting fixture.

In addition, as the exhaust fan 8, Sirotskov fan 2
5, an exhaust pipe 26 as shown in FIG. 6 is rotatably attached to the exhaust section.

Next, the operating mode of the range hood having the above configuration will be explained.

First, the exhaust fan 8 is activated. Then, the flow of high-temperature hot air generated from the lit stove 23, pot, etc. during cooking is controlled by the door 20 in the direction of the exhaust fan 8, and rises as shown by the dotted arrow and passes through the exhaust air intake hole 5b. and also passes between the upper part of the door 20 and the front panel 3, and also,
All the high-temperature air passes between the lower part of the door 20 and the front panel 3, and finally passes through the filter 19 and is discharged outdoors through the rear opening 3b of the front panel 3 and the exhaust duct 10. .

At this time, the indoor air becomes high in temperature, so due to the differential temperature induction combined with the action of the exhaust fan, the indoor high-temperature air is vigorously discharged to the cooler outdoors, and the indoor pressure becomes negative with respect to the outdoors. Therefore, the damper 11b of the air supply duct 11 opens, and outside air is introduced into the air supply duct 11 from the intake hole 11a. The outside air is passed through the ventilation pipe 11d to the rear panel 3a of the front panel.
It is ejected to the front part, and also passes through the gap 14 on the back side between the back surface 3a and the wall surface 13 by the gap forming member 4 through the ventilation hole 11c, and between the top surface side of the upper panel 5 and the hanging cabinet 15. The liquid flows into the gap 16 on the upper surface side formed by the gap forming member 6. Then, it passes through the ventilation holes 4a and 6a of the spacer forming members 4 and 6, and is ejected to the front of the front panel 3 and below the upper panel 5, as shown by solid arrows. The outside air that is blown out forms an air curtain on the sides and front of the range hood 1 to prevent the high-temperature hot air from dissipating indoors, and also joins with the high-temperature hot air to cool the high-temperature hot air while being discharged outdoors. That will happen.

Furthermore, even if a ventilation window or the like is opened and the difference in pressure and temperature between indoors and outdoors decreases and becomes 0 (same pressure or temperature), the door 20 may become hotter than outdoors due to high-temperature hot air. Therefore, the air located in the space between the door 20 and the front end of the air supply duct 11 flows out to the outside where the temperature is lower through the exhaust fan, and the air in that area is brought into a state of negative pressure compared to the outside.
Since the outside air will flow into the air supply duct from the air supply hole 11a, it is possible to prevent the deterioration of the air supply and exhaust function of the range hood 1, resulting in a self-holding circuit.

And again, range hood 1 and range hood 1
Between the wall surface 13 to which the is attached and the hanging cabinet 15, a space 14 on the back side and a space 16 on the top side are provided by space forming members 4 and 6, and a space 14 on the back side and a space 16 on the top side. 16 is the exhaust fan 8
Since it becomes a heat insulating layer through which air constantly circulates during operation, there is no need to take separate heat insulation measures as in the past.

Note that, as shown in FIGS. 2, 3, and 5, a clogging detection device 21 for the filter 19 may be provided in one of the ventilation pipes 11d at the front end of the air supply duct 11. This clogging detection device 21 includes a coil spring 2
The valve 21a is biased toward the ventilation pipe 11d by the valve 1b.
It consists of a valve mechanism and a proximity switch 21c. When the filter 19 becomes clogged and the exhaust volume decreases, the pressure difference between indoors and outdoors becomes smaller, and the amount of supplied air flowing into the air supply duct 11 decreases. Then, the force of the supplied air that pushes the valve 21a of the clogging detection device 21 forward against the biasing force of the coil spring 21b becomes weaker. When the valve 21a is moved toward the rear of the valve 21a, that is, toward the ventilation pipe 11d, the proximity switch 21c is activated and the user is notified by light, sound, or the like. Therefore, it can always be used in a substantially constant state.

In addition, a temperature sensor (not shown) is connected to the ventilation pipe 11.
d, and even if the stop switch of the exhaust fan 8 is pressed, the exhaust fan 8 will not stop unless the temperature inside the range hood 1 reaches a predetermined low temperature. The exhaust fan 8 is activated by the activation of the sensor, and the electric capacity adjustment (volume adjustment) is automatically linked in response to the temperature change detected by the temperature sensor, and the temperature is maintained at a certain safe temperature after the stove is turned off. When you reach
It is also possible to provide a fully automatic circuit in which the exhaust fan 8 is stopped.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, in which Fig. 1 is a schematic front view of the range hood, Fig. 2 is an enlarged schematic sectional view taken along the line A-A in Fig. 1, and Fig. 3 is a sectional view of the upper part of the front panel. , FIG. 4 is a sectional view of the lower part of the front panel, FIG. 5 is a partial sectional view showing the clogging detection device, and FIG. 6 is a partial sectional view showing another exhaust fan of the range hood. 1... Range hood, 3... Front panel, 3a
... Back surface, 3b ... Back opening, 4, 6 ... Intermediate forming member, 4a, 6b ... Ventilation hole, 5 ... Upper panel, 5a ... Bottom surface, 5b ... Exhaust intake hole, 5
c...Top surface, 7...Supply/exhaust duct, 7a...Inner cylinder, 7b...Outer cylinder, 8, 25...Exhaust fan, 1
0... Exhaust duct, 11... Air supply duct, 19...
...Filter, 20...door.

Claims (1)

[Scope of Claim for Utility Model Registration] A range hood that is integrally constructed of a front panel 3 in which an air supply/exhaust duct 7 is arranged at the rear of a rear opening 3b, and an upper panel 5 provided with an exhaust air intake hole 5b on the lower surface. The supply/exhaust duct 7 includes an inner cylinder 7a in which an exhaust fan 8 is disposed and serves as an exhaust duct 10, and an outer cylinder 7 forming an air supply duct 11 between the inner cylinder 7a.
A gap 14 on the back side is formed by the gap forming member 4, which has a plurality of ventilation holes 4a opening toward the bottom and side surfaces, respectively, at the lower end and left and right ends of the back surface 3a of the front panel 3. A gap 16 on the top surface side is formed by a gap forming member 6 having a plurality of ventilation holes 6a opening toward the front and side surfaces, respectively, at the front end and left and right ends of the top surface 5c of the upper panel 5, and the gap 16 on the top surface side is formed. The bottom gap 14 and the bottom gap 16 on the top side communicate with each other, and the bottom gap 14 on the back side communicates with the air supply duct 11. A filter 19 is disposed to close the back opening 3b, and a door 20 is disposed in front of the filter 19 with a predetermined distance from the filter 19. Range hood.