JPH03207925A - Waste gas exhausting device - Google Patents

Abstract

PURPOSE:To efficiently collect smoke and oil mist at a lower air flow rate by a method wherein two or more louvers are provided on a suction port and the opening degree of the louvers are controlled depending on a burner to be used. CONSTITUTION:Two pair of louver blocks 22 and 23 are mounted on a suction port 16 and are able to turn on vertical axes 21. The louver blocks 22 and 23 each consist of two or more louvers 24 which are rotatably connected together by a connecting plate 25 through connecting bosses 26 on the upper ends so that the opening degree of the whole louvers is adjustable at once by handling one of the louvers 24. In the case, for an example of smoke and oil mist collection, a burner 14 in the front row is used, the louver block 23, which is closest to the burner, is opened full, and the other louver block 22 is closed. After that, an exhaust fan 18 is brought in operation simultaneously with start of cooking so that an air flow from the suction port 16 to an exhaust port 19 is generated and smoke and oil mist are directed into an exhaust duct 20. That is, as the suction port 16, which is close to the generation source of oil mist, is opened, the suction air flow is concentrated on the suction port and smoke and oil mist are intensively induced.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a smoke evacuation device for discharging oily smoke and the like generated during cooking from cooking utensils used in kitchens and the like.

2. Description of the Related Art Conventionally, as shown in FIG. 12, a smoke evacuation device B for removing oily smoke and other smoke generated from cooking utensils used in the kitchen during cooking has one end connected to the burners 2 and 3 of the cooking utensil 1. A smoke exhaust duct 7 is installed, which has an inlet 4 open at one end and an exhaust outlet 6 that penetrates the wall 5 of the house and faces the outdoors at the other end, and an exhaust blower 8 is installed at the exhaust outlet 6. He is in charge. In addition, a grease filter 9 is detachably installed in the smoke exhaust duct 7 near the intake port 4 in order to separate the oil contained in the oil smoke.
has been established. Note that solid line arrows indicate the flow of air by the exhaust blower 8, and broken line arrows indicate the flow of oil smoke and the like.

When the exhaust blower 8 is driven in the above structure, a flow of air is generated from the suction port 4 to the discharge port 6, and oil smoke and the like generated along with the suction air flow from the suction port 4 are sucked into the smoke exhaust duct 7. . On the other hand, the oil contained in the oil smoke adheres to a grease filter 9 installed inside near the inlet 4 and is separated, and then purified air is discharged outdoors from the outlet 6. Problems to be Solved by the Invention However, with the above structure, the farther the burner is located from the intake port, the larger the amount of air required for collection, so a large amount of air inside the kitchen is exhausted. There were issues such as a significant decrease in the effectiveness of heating and cooling, the occurrence of cold drafts (cold air flowing inside the kitchen), and increased noise. On the other hand, although the oil content in the inhaled oil smoke is captured by the grease filter? There was also the problem that the flames accumulated inside the smoke exhaust duct due to insufficient capture efficiency, and if flame was drawn into the smoke exhaust duct, there was a risk of igniting and causing a duct flame.

The present invention solves these conventional problems, and its primary purpose is to effectively collect oil smoke and the like with a smaller air volume. The second purpose is to prevent the occurrence of duct flame by creating a suffocating condition inside the smoke exhaust duct. Means for Solving the Problem In order to solve this problem and achieve the above-mentioned first object, the present invention provides, as a first means, an inlet opening with one end facing a plurality of burners of a cooking utensil. The other end has a smoke exhaust duct with an exhaust blower installed and a smoke exhaust duct facing outdoors as an exhaust port, and the intake port is provided with a plurality of louvers, and the louvers can be opened depending on the burner to be used. The degree can be adjusted. In addition, as a second means, the smoke exhaust duct has an inlet opening with one end facing the plurality of burners of the cooking utensil, and a smoke exhaust duct with an exhaust blower placed at the other end and facing the outdoors. ,
The suction port is provided with a plurality of louvers, and at least the opening degree of the louvers or the amount of air blown by the exhaust blower is automatically adjusted depending on the amount of gas supplied from the burner used. On the other hand, as a third means to achieve the second purpose,
It has an inlet opening with one end facing multiple burners of the cooking utensil, and a smoke exhaust duct with an exhaust blower arranged at the other end and serving as an exhaust outlet facing outdoors. In addition to providing a louver, the louver is closed or the exhaust blower is also stopped at the same time based on a signal from a temperature detection sensor. Effect: With this structure, the present invention changes the suction position at the suction port depending on the location where the wandering occurs, concentrates the intake air flow, and effectively collects oil smoke and the like. Additionally, by automatically setting the optimal suction conditions according to the burner being used and the amount of gas supplied to it, it is possible to effectively collect oil smoke with a small air volume. Furthermore, if flames are inhaled, close the louver or
By also stopping the exhaust blower and blocking the inflow of fresh air into the smoke exhaust duct, it is possible to prevent a duct fire from occurring.

EXAMPLE A first example of the present invention will be described below with reference to the accompanying drawings. In the smoke exhaust system WA of the present invention, as shown in FIGS. 1 and 2, the smoke exhaust duct 20 has one end facing the plurality of burners 12, 13, 14, 15 of the cooking utensil 11, and
1 is provided with an inlet 16 that opens toward the front, and the other end is provided with an outlet 19 that penetrates the wall surface 17 of the house and connects to the outdoors.
A discharge blower 18 is arranged at the discharge port 19. The suction port l6 is provided with two pairs of louver bodies 22 and 23 that rotate around a vertically set rotation axis 21. As shown in FIG. 3, the louver bodies 22 and 23 are constructed by connecting a plurality of louvers 24 with a connecting plate 25 so that the upper end of the louver can rotate via a connecting boss 26. The opening degree of the entire louver connected by! It allows for li clauses. That is, the burners l2, 13, 1 used
The opening degrees of the two pairs of louver bodies 22, 23 are arbitrarily adjusted manually in accordance with the positions of 4 and 15 and the amount of smoke generated therefrom. In FIG. 2, solid line arrows indicate the flow of air by the exhaust air blower 1118, and dashed line arrows indicate the flow of oil smoke, etc. Next, as an example of the operation of collecting oil smoke etc., burner 1 on the front side
We will explain the case of using 4. That is, as shown in FIG. 1, the louver body 23 closest to the burner l4 is opened, and the other louver body 22 is closed. Thereafter, the burner 14 is ignited to start cooking, and at the same time the exhaust blower 18 is operated to create a flow of air from the intake port 16 to the exhaust port 19, and suck oil smoke and the like into the smoke exhaust duct 20. In other words, the inlet
6, the intake air flow is concentrated and oil smoke etc. are inhaled intensively. Note that the oil content sucked into the smoke exhaust duct 20 is removed by adhering to the grease filter 27 provided inside the suction port 16. Next, a second embodiment of the present invention will be explained using the accompanying drawings. As shown in FIGS. 4 and 5, the smoke evacuation device A of this embodiment has a smoke evacuation duct 20 that has one end connected to a plurality of burners 12, 13, 14, and 15 of a cooking utensil 11. An inlet 16 is provided which opens toward the front of the house, and the other end penetrates the wall l7 of the house to expose an outlet 19 to the outdoors, and an exhaust blower 18 is disposed at the outlet 19. has been done.

The suction port 16 is comprised of two pairs of louver bodies 22 and 23 that rotate about a rotation axis 21 set vertically. As shown in FIG. 6, the louver bodies 22 and 23 are configured such that a plurality of louvers 24 are rotatably connected to each other by a connecting plate 25 at the upper end of the louver via a connecting boss 26, and the rotating shaft 21 is A driving motor 28 is directly connected to one of the louvers 28, and the opening degree of the entire connected louver 24 can be adjusted by the rotation of the motor 2B. Further, gas supply pipes 2 for the burners 12, 13, 14, l5
9, gas flow rate detectors 30, 31, 32, and 33 are arranged, and as shown in FIG.
In response to the output signals of 31, 32, and 33, the motor 28
A control circuit 34 is provided so that the rotation speed of the exhaust air blower 1118 can be controlled. That is, the burner 12 used
, l3, 14, 15 to open and close the louver bodies 22, 2.
The opening degree of the louver 24 and the operating conditions of the exhaust blower 18 in No. 3 are automatically set to optimal conditions set in advance. Here, the solid line arrows indicate the flow of air by the exhaust blower 18, and the broken line arrows indicate the flow of oil smoke, etc.

Next, as an example of the operation of collecting oil smoke etc., burner 1 on the front side
We will explain the case of using 4. That is, at the same time as the burner 14 is ignited and cooking begins, the control circuit 34 is operated according to the output of the flow rate detector 32 disposed in the gas supply line 29 of the burner 14, as shown in FIG. ,
The louver body 23 closest to the burner 14 is opened, and the other louver body 22 is closed. At the same time, the exhaust blower 18 is also operated in an optimal state to create a flow of air from the intake port 16 to the discharge port 19, and remove oil smoke etc. is inhaled into the smoke exhaust duct 20. That is, by automatically placing the intake port 16 near the source of oil smoke, etc., the intake air flow is concentrated, and oil smoke, etc. is inhaled in a concentrated manner. Incidentally, the oil sucked into the smoke exhaust duct 20 is removed by adhering to the grease filter 27 provided inside the suction port 16. Next, a third embodiment of the present invention will be explained using the accompanying drawings. In the smoke exhaust system WA of the present invention, as shown in FIGS. 8 and 9, the smoke exhaust duct 20 has one end facing the plurality of burners l2, l3, 14, 15 of the cooking utensil 11, and
1 is provided with an inlet port l6 that opens toward the front, and the other end is provided with an outlet port 19 that penetrates the wall surface l7 of the house and connects to the outdoors.
A discharge blower 18 is arranged at the discharge port 19. The suction port 16 is surrounded by two sets of louver bodies 22 and 23 that rotate around a vertically set rotation axis 21. The louver bodies 22 and 23 have a plurality of louvers 24 as shown in FIG.
are rotatably connected by a connecting plate 25 at one end upper part via a connecting boss 26, and a driving motor 28 is directly connected to one of the rotating shafts 21, so that they are connected by the rotation of the motor 28. The entire louver 24 can be opened and closed. Furthermore, a temperature sensor 35 using a thermocouple, for example, is disposed inside the suction port 16, and as shown in FIG. A control circuit 34 is provided for control.

Here, solid line arrows indicate the flow of air by the exhaust blower 18, and broken line arrows indicate the flow of oil smoke, etc.

Next, the operation of collecting oil smoke, etc. will be explained. That is,
At the same time as the burner l4 is ignited and cooking begins, the exhaust blower l8 is operated to create an air flow from the inlet 16 to the outlet 19 to suck oil smoke and the like into the smoke exhaust duct 20. On the other hand, in the event of an abnormality such as a tempura fire, the control circuit 34 controls the motor 2B by the output signal of the temperature sensor 35.
and controls the exhaust blower 18, and controls the louver bodies 22, 23.
By closing the exhaust fan 18 and stopping the exhaust blower 18, the inside of the smoke exhaust duct 20 is suffocated, thereby preventing a fire inside the smoke exhaust duct 20. Note that the oil components sucked into the smoke exhaust duct 20 are
It is removed by adhering to the grease filter 27 provided inside the grease filter 6. Effects of the Invention As is clear from the description of the embodiments above, the following effects can be obtained by the smoke evacuation device of the present invention. By arbitrarily setting the intake port at the optimal position depending on the amount of oil smoke generated and the position of the burner used, the intake air flow is concentrated and oil smoke is collected effectively. Additionally, the opening conditions of the inlet port and the operating conditions of the exhaust blower are automatically set to the optimal suction conditions according to the amount of gas supplied to the burner being used, improving the operability of the device. Furthermore, if flames are inhaled, the system automatically closes the louvers or stops the exhaust blower to cut off the flow of fresh air into the smoke exhaust duct, creating a suffocating condition to prevent fires. be.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a smoke evacuation device showing a first embodiment of the present invention, Fig. 2 is a sectional view of the same device, Fig. 3 is a perspective view of a louver body of the same device, and Fig. 4 is a perspective view of the smoke evacuation device according to the present invention. 5 is a sectional view of the device, FIG. 6 is a perspective view of the louver body of the device, and FIG. 7 is a control block diagram of the device. Fig. 8 is a perspective view of a smoke evacuation device showing a third embodiment of the present invention, Fig. 9 is a sectional view of the same device, Fig. 10 is a perspective view of a louver body of the same device, and Fig. 1l is a perspective view of the same device. @Control block diagram, Figure 12 is a sectional view of the conventional example.

Claims (3)

[Claims] (1) An inlet opening with one end facing the plurality of burners of the cooking utensil, and a smoke exhaust duct with an exhaust blower arranged at the other end facing outdoors and serving as an exhaust outlet, and the inlet The smoke exhaust device is provided with a plurality of louvers, and the opening degree of the louvers can be adjusted depending on the burner used. (2) One end has an inlet opening facing the burner of the cooking utensil, and the other end has a smoke exhaust duct with an exhaust blower arranged and facing outdoors as an exhaust outlet; A smoke evacuation device that includes a plurality of louvers and automatically adjusts at least the opening degree of the louvers or the amount of air blown by an exhaust blower according to the gas supply amount of the burner used. (3) An inlet opening with one end facing the plurality of burners of the cooking utensil, and a smoke exhaust duct with an exhaust blower arranged at the other end facing outdoors and serving as an exhaust outlet, and the inlet The smoke evacuation device is provided with a plurality of louvers, and closes the louvers or simultaneously stops the exhaust blower based on a signal from a temperature detection sensor.