JPH036428B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a ventilation fan that exhausts oil smoke etc. generated during cooking in a kitchen range to the outside, and is particularly suitable for fire prevention that blocks flames etc. from flowing into the exhaust duct. It is related to shutters.

[Conventional technology]

Conventionally, this type of ventilation fan has generally had a suction port located almost directly above the range, and has a mechanism for sucking rising air from the range and discharging it outdoors. However, since the above-mentioned ventilation fan has an inlet at a predetermined height from the range, oily smoke rising from the range tends to spread from the middle, and a large-capacity blower is required to exhaust such oily smoke. Replacing and cleaning the filter used in the ventilation fan is extremely difficult because the ventilation fan is located above the user.

Further, FIG. 6 shows a cooking exhaust device as disclosed in, for example, Japanese Patent Application Laid-open No. 131949/1983, in which a suction port is provided at the rear of the cooking table. This exhaust device forms a rising portion 3 at the rear of a cooking table 1 on which a gas range 2 is arranged or disposed on the upper surface of the cooking table 1.
An intake port 4 is inclined toward the range 2 side on the upper surface, and a forward airflow guide plate 6 is provided above the range 2 on a wall 5 that stands upright in contact with the rear part of the rising part 3.
A duct 7 is connected to the intake port 4, and a blower 8 is provided at the exhaust port 9 at the end of the duct 7 to form an exhaust path, so that oil smoke, etc. generated during cooking is sucked through the intake port 4, and the exhaust port 9 More and more waste is being discharged outdoors. In addition, in the figure, 10, 14, and 15 are airflow guide grids, 11 is a skylight installed at the bottom of the range 2, and 1
Reference numeral 2 denotes a sky forced smoke cylinder, and 13 represents an opening of this smoke cylinder 12.

[Problem that the invention seeks to solve]

The conventional cooking exhaust device described above sucks out oily smoke, etc. generated during cooking without dispersing it upward, but since the exhaust path is formed on the back of the cooking table 1, this There was a problem that the cooking table 1 had to be moved forward to make room for the exhaust passage, and that the space on the front wall of the cooking table 1 was not used effectively. Furthermore, since the exhaust flow is downward, a large blower is required to perform sufficient exhaustion.

This invention was made to solve this problem, and it is designed to exhaust oily smoke etc. generated during cooking to the outside from a ventilation mechanism installed above the range, and to prevent flames etc. from entering the duct. The purpose is to obtain a ventilation fan that blocks inflow.

[Means for solving problems]

The ventilation fan of the present invention has a duct having an air intake port hanging down toward the range from a suction part of a blower mechanism provided above the range, a filter provided in the duct, and a fire prevention shutter provided between the air intake port and the filter. It is something.

[Effect]

According to this invention, when the flames and high-temperature exhaust flow generated during cooking are sucked into the duct from the intake port, the fuse of the fireproof shutter is blown by the high heat, and the fireproof shutter is rotated by the spring force. By closing the intake port, it is possible to prevent flames and the like from flowing into the duct.

〔Example〕

1 to 4 show an embodiment of the present invention. FIG. 1 is a side sectional view of a ventilation fan, FIG. 2 is a front view, and FIGS. 3 and 4 are exploded perspective views of the ventilation fan. In the figure, reference numeral 15 denotes an outer box for the air blowing mechanism, and the inside of this outer box 15 is partitioned by a partition plate 16. Reference numeral 17 designates an exhaust fan that is housed in one box via an inlet plate 18 and is housed in a fan casing 19. Reference numeral 20 designates an exhaust fan motor that is attached to the front cover 21 of the outer box 15. 22 is an air supply fan housed in the other box and housed in the fan casing 23; 24 is the front cover 21;
This is an air supply fan motor installed in the 25 is an exhaust elbow attached to the top plate 26 of the outer box 15; 27
is also an air supply elbow. Reference numeral 28 denotes a switch mounting case, and this case is equipped with a switch 29 and a lighting fixture 30. On the lower front side of the lower surface of the case 28, there is an air outlet 31 for blowing air supplied from an air supply fan onto the face of the cook, and an air outlet 31 at the rear thereof. It is provided with a discharge port 32 that blows air downward. 33 is a mounting screw for fixing the outer box 15 of the blower mechanism configured as described above to the wall surface 34 above the cooking table; 35 is a piping duct connected to the air supply/exhaust elbows 26 and 27, respectively; 36 is this duct. This is a vent cap attached to the outdoor opening of No. 35.

Reference numeral 38 denotes a duct connected to a suction section 37 formed by an exhaust fan 17 formed on the rear lower surface of the outer box 15 of the blower mechanism section. 40
An intake port 4 made of a separate member that opens diagonally toward the
1 is installed.

FIG. 5 is a detailed view of the duct 38, where 42 is an oil reservoir provided at the bottom of the intake port 41, and 43 is a detailed view of the duct 38.
The upper end of the filter 43 is supported by a hanger 44 attached to the rear wall 38a of the duct, and the lower end is fixed together with the intake port 41 by a thumbscrew 45. Thereby, the intake port 41 and the filter 43 can be removed by removing the thumbscrew 45. 46 is duct 38
This eaves 4 is attached to the front wall 38b of
The height of the eaves 46 can be changed by selectively hanging on the eaves 47 formed in stages on the side wall 38c of the duct 38. 48 is a fireproof shutter, the lower end of which is rotatably supported by a support plate 49 attached to the lower end of the rear wall of the duct 38. A mounting plate 51 is fixed to the surface of the fire prevention shutter 48 at an approximately midpoint between the lower end and the upper end, and a portion of the mounting plate 51 spaced apart from the shutter surface and the support plate 4
A spring 55 is stretched between the fire shutter 9 and the fire shutter 9 to rotate the fire shutter 48 in the closing direction. On the other hand, a fuse 50 is attached to the above-mentioned portion of the mounting plate 51 with screws 52, and another spring is installed between the fuse 50 and a support plate 53 attached to the duct rear wall 38a above the upper end of the fire shutter 48. 54 is stretched. The fire shutter 48 is vertically pulled up along the rear wall of the duct by the spring 54 against the spring force of a spring 55 for rotating the shutter. In addition, 5
Reference numeral 6 indicates a hanging cabinet disposed on the left and right sides of the blower mechanism, and reference numeral 57 indicates a pot on the range 40.

Next, the operation will be explained. First, switch 2
9 to rotate the exhaust fan 17 and the air supply fan 22. And the pot 57 in the microwave 40
When cooking is carried out, oil smoke and waste gas are sucked into the duct 38 from the intake port 41, and the filter 4
3, rises inside the duct 38, passes through the exhaust fan 17, passes through the elbow 25, and is discharged from the piping duct 35 to the outdoors. Furthermore, air sucked in from the outdoors through the elbow 27 by the rotation of the air supply fan 22 is blown downward from the outlet 32 of the switch case 28, hits the eaves 46, and flows in the direction of the arrow. At this time, part of the oil smoke etc. from the pan 57 leaking out from the intake port 41 is enveloped by the air flow, so that all the oil smoke etc. is sucked in from the intake port 41. In addition, the air flow velocity at the eaves 46 is 0.5~
At 0.9 m/s, the angle of the eaves is 5 to 10 degrees, and oil smoke can be sucked in most efficiently.

In addition, a part of the air supplied by the air supply fan 22 is blown out from the air outlet 31 and blown onto the face of the cook, thereby making it possible to relieve the heat during cooking. In addition, when the height dimension of the pot 57 changes, the eaves 46 can be hung on the eaves hangings 47 according to the height.

On the other hand, most of the oil smoke sucked into the duct 38 is collected by the filter 43, so that the exhaust air is purified and discharged outdoors. The oil adheres to the oil, flows down the wall surface, and collects in the oil sump 42. Therefore, to dispose of the oil, the intake port 41 and the filter 43 can be removed at the same time by removing the thumbscrew 45, so the oil in the oil reservoir 42 can be drained and the filter 43 can be cleaned or replaced.

Now, the fire shutter 48 is normally installed vertically along the rear wall of the duct to prevent pressure loss in the air passage (duct), and when hot air or flames are sucked in from the intake port 41 during cooking, the fire 50 is fused, and the spring force of the spring 55 causes the fire shutter 48 to rotate about the support plate 49 as shown by the imaginary line in FIG. Inflow can be prevented. In addition, to reset the fire shutter 48, remove the intake port 41, replace the fuse 50, and
The fuse 50 may be latched onto the spring 54.

〔Effect of the invention〕

As explained above, this invention suspends a duct having an air intake port toward the range from the air intake part of the air blowing mechanism provided above the microwave oven, so that flames or high-temperature air is sucked into the duct from the air intake port. In this case, a fire prevention shutter is installed to close the intake port, and this fire prevention shutter is normally installed vertically along one wall of the duct to prevent pressure loss in the air passage, reducing the exhaust effectiveness under normal conditions. However, when flames or the like are drawn into the duct, the intake port can be closed to prevent a fire from occurring.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a ventilation fan showing an embodiment of the present invention, Fig. 2 is a front view, Figs. 3 and 4 are exploded perspective views of the ventilation fan, and Fig. 5 is a detailed enlarged sectional view of the duct. , FIG. 6 is a sectional view of a conventional cooking exhaust device. 15...Outer box, 17...Exhaust fan, 22...
... Air supply fan, 31 ... Air outlet, 32 ... Leaf outlet, 37 ... Suction part, 38 ... Duct, 40 ...
Range, 41...Intake port, 42...Oil sump, 43
...Filter, 45...Thumbscrew, 46...
Eaves, 47...Eave hanging, 48...Fire shutter, 49...Base plate, 50...Fuse, 5
4,55...Spring. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A ventilation fan that is equipped with an air blowing mechanism section having an exhaust fan and a suction section above a kitchen range, and has a duct hanging from the suction section with an intake port at a position close to the range, the lower end of which is connected to the front and rear of the duct. a fire shutter that is rotatably attached to the lower end of either wall and closes the intake port; a portion of a mounting plate that is attached to the surface of the fire shutter that is spaced apart from the surface; and the wall of the duct. A first spring 55 is tensioned between the first spring 55 and the lower end of the fire shutter, and a fuse 50 is tensioned between the wall portion of the duct above the upper end of the fire shutter and the portion of the mounting plate. second spring 54
A ventilation fan consisting of: