JPH035499B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a ventilation fan that exhausts oil smoke, steam, exhaust gas, etc. generated during cooking in a kitchen range to the outside.

[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 ventilation fan device for cooking, 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 system
A rising part 3 is formed at the rear of the cooking table 1 on which the gas range 2 is arranged or disposed, and an air intake port 4 is inclined toward the range 2 on the upper surface of the rising part 3. A forward airflow guiding plate 6 is provided above the microwave oven 2 on a wall 5 that stands upright in contact with the microwave oven.
A duct 7 is connected to the intake port 4, and a blower 9 is provided at the exhaust port 8 at the end of the duct 7 to form an exhaust path, so that oil smoke, etc. generated during cooking is sucked through the exhaust port 4, and the exhaust port 8 More and more waste is being discharged outdoors. In the figure, reference numerals 10 and 11 are airflow guide grids, 12 is a skylight provided at the bottom of the range 2, 13 is a skyfire forced smoke tube, and 14 is an opening of this smoke tube 13.

[Problem that the invention seeks to solve]

The conventional cooking exhaust device described above sucks oil smoke generated during cooking without dispersing it upward, but since the exhaust path is formed on the back of the cooking table 1, this exhaust In addition to having to move the cooking table 1 toward the front due to the space available,
There were problems such as the space on the front wall of the cooking table 1 not being 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 efficiently sucks up oily smoke generated during cooking from the air intake port at the lower end of the duct that hangs down from the air blower mechanism installed above the range, and directs it to the outdoors. To provide a ventilation fan which can discharge outside air and prevent backflow of outside air from an intake port when the ventilation fan is stopped.

[Means for solving problems]

The ventilation fan of the present invention is provided with a blower mechanism section having an air supply fan above the range, a discharge port for blowing air downward, an exhaust fan and a suction part, and a suction part located close to the range to remove oil smoke from the range. A duct is connected to the duct that has an intake port that sucks in air, and an eaves are installed above the intake port to bend the outside air flowing down from the discharge port to prevent oil smoke from rising. A shutter is provided to prevent the backflow of outside air from the duct's intake port when the duct is stopped, and the shutter is placed closely along the curved surface of the elbow when opened due to exhaust air pressure.

[Effect]

According to this invention, the outside air flowing down from the discharge port by the air supply fan collides with the eaves attached to the duct and bends, and this outside air envelops oil smoke etc. generated during cooking and suppresses the rise.
The oil smoke and the like can be sucked in through the suction port of the duct and discharged outdoors. Further, when the shutter provided in the exhaust elbow is opened by the exhaust air pressure, it comes into close contact with the curved surface of the elbow, thereby reducing exhaust resistance and noise.

〔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 58 denotes an arc-shaped shutter rotatably supported by a shaft 59 within the exhaust elbow 25. When the shutter 58 is opened by exhaust air pressure, it is opened in close contact with the inner surface of the curved surface 25a of the elbow 25. Furthermore, when the ventilation fan is stopped, the shutter 58 closes the elbow 25 using its own weight to prevent backflow of outside air. Reference numeral 28 denotes a switch mounting case, which is equipped with a switch 29 and a lighting fixture 30, and has an air outlet 31 on the lower front side of the lower surface of the case 28 that blows outside air from an air supply fan onto the cook's face;
A discharge port 32 that blows air downward is provided at the rear thereof. 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 microwave table; 35 is the above-mentioned supply/exhaust elbow 26, 27;
36 is a vent cap attached to the outdoor opening of this duct 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
The eaves 46 protrudes from the front wall 38b of the duct 38, and the eaves 46 is selectively hooked to an eaves hook 47 formed stepwise on the side wall 38c of the duct 38.
6 height can be changed. Note that the eaves 46 may extend to the left and right sides 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 fuse 50 is fixed to the fire shutter 48 with a screw 52 via a mounting plate 51. A spring 54 is stretched between the fuse 50 and a support plate 53 attached to the rear wall 38a of the duct to vertically mount the fire shutter 48. It's being lowered. 5
5 is a spring stretched between the mounting plate 51 and the support plate 49, and when the fuse 50 is fused, the spring 5
The fire shutter 48 is rotated with a spring force of 5 to close the intake port 41. Note that 56 indicates a hanging cabinet disposed on the left and right sides of the blower mechanism section, and 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 are passed through the filter 4.
3, rises inside the duct 38, passes through the exhaust fan 17, opens the shutter 58 by exhaust air pressure, 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 curves in the direction of the arrow. At this time, some of the oil smoke etc. leaking from the pan 57 leaks from the intake port 41 and is suppressed from rising by being enveloped by the air flow, so that all the oil smoke is sucked in from the intake port 41. Incidentally, when the air flow velocity at the eaves 46 is 0.5 to 0.9 m/s and the angle of the eaves is 5 to 10 degrees, oil smoke and the like can be sucked in most efficiently.

In addition, some of the air supplied by the air supply fan 22 is blown out from the air outlet 31 and can be blown onto the face of the cook to relieve the heat during cooking.
Cooking working conditions can be significantly improved.
However, in winter, the discharge port 32 may be closed or
Alternatively, it is preferable to change the direction of the wind away from the face so that there is no problem even in winter. In addition,
If the height dimension of the pot 57 changes, the eaves 46
can be adjusted to the eave hanging 47 according to its 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.

Furthermore, when high temperature air or flames are sucked in from the intake port 41, the fire shutter 48 closes the fuse 5.
0 is fused, and the spring force of the spring 55 causes the fireproof shutter 48 to rotate about the support plate 49 as shown by the imaginary line in FIG.
1 is closed, flame can be prevented from flowing into the duct 38. 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.

Note that when the ventilation fan is stopped, the shutter 58 rotates under its own weight and closes the exhaust elbow 25, so the outside air flowing in from the piping duct 35 is blocked by the shutter 58 and no longer flows into the interior. . Therefore, it is possible to prevent outside air from flowing back into the room from the intake port of the duct 38 while the vehicle is stopped.

〔Effect of the invention〕

As explained above, this invention eliminates oil smoke, etc. generated during cooking by flowing outside air from the outlet of the air supply fan at the upper part of the intake port of the duct, colliding with the eaves attached to the duct and bending the air. It is enveloped by the above airflow and can suppress its rise, and as a result, oil smoke, etc. can be efficiently sucked in from the intake port of the duct and discharged outdoors, preventing oil smoke from staining the ventilation fan itself and contaminating the room. . In addition, the shutter installed inside the exhaust elbow to prevent outside air from flowing backward from the duct's intake port when the ventilation fan is stopped opens along the curved surface of the elbow during exhaust operation, reducing air resistance caused by exhaust and reducing pressure. This has the effect of minimizing loss, thereby increasing exhaust air volume, and reducing noise.

[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...Blowout port, 32...Discharge port, 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, 58...Shutter.
In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. Equipped with a blower groove above the kitchen range that has an air supply fan, a discharge port that blows air downward, an exhaust fan, and a suction port that sucks air,
A duct is connected to the above-mentioned suction part, which has an intake port that sucks in oil smoke, etc. from the range, in a position close to the range, and the upper part of the intake port bends the outside air flowing down from the above-mentioned discharge port to prevent oil smoke, etc. from rising. An arc-shaped shutter is rotatably supported in the exhaust elbow that discharges the air from the suction part to the outdoors by the exhaust fan, and when this shutter is opened by the exhaust wind pressure, it follows the curved surface of the elbow. A ventilation fan that is characterized by being placed in close contact with the fan.