CN111279132B - Exhaust device for cooking utensil and cooking method - Google Patents

Abstract

Provided is an energy-saving exhaust device for a cooking utensil, which suppresses odor from flying in a room in which the cooking utensil is installed. An exhaust device for a cooking appliance comprises: a cooking chamber (12) in which a cooking device is housed; a door (14) provided to the cooking chamber (12); a blower (20) connected to an exhaust passage for discharging air in the cooking chamber (12) into or out of a room in which the cooking chamber (12) is installed; and a control unit (50) that changes the operation of the blower (20) in accordance with the open/close state of the door (14).

Description

Exhaust device for cooking utensil and cooking method

Technical Field

The invention relates to an exhaust device for a cooking utensil and a cooking method.

Background

In recent years, in convenience stores, supermarkets, department stores, and the like, business models have been popular in which cooking utensils are provided on floors (floor) in stores and cooked food is provided (sold) to guests.

When such in-store cooking is performed, a method of preventing odor and the like emitted during cooking from scattering in the store is required.

As a conventional technique, japanese patent application laid-open No. 6-74507 proposes a cooking device that covers the periphery of a cooking utensil and exhausts air in a space (cooking chamber) whose opening is closed by a door. In the cooking device, odor does not leak from the opening portion as long as the door is closed, and odor generated inside is discharged outside.

Disclosure of Invention

However, in the conventional technique, the blower is always operated. Therefore, the aspect of energy saving which has been strongly demanded in recent years is not considered.

Accordingly, an object of the present invention is to provide an exhaust device for a cooking appliance, which can suppress odor from being emitted in a room in which the cooking appliance is installed and can satisfy a demand for energy saving, and a cooking method using the exhaust device for a cooking appliance.

The present inventors have made extensive studies to solve the above-described problems, and as a result, have found that an energy saving effect can be obtained by controlling a blower in accordance with an open/close state of a door provided in a cooking chamber, and have obtained the present invention.

That is, the exhaust device for a cooking appliance according to the present invention includes: a cooking chamber in which a cooking appliance is housed; a door provided to the cooking chamber; a blower connected to an exhaust passage for discharging air in the cooking chamber into or out of a room in which the cooking chamber is provided; and a control unit that changes the operation of the blower in accordance with the open/close state of the door.

According to the present invention, it is possible to prevent odor from being emitted from the cooking chamber while the door is closed, and to reduce power consumption compared to a case where the blower is constantly operated at a constant air volume to discharge odor because the operation of the blower is changed in accordance with the open/close state of the door.

Drawings

Fig. 1 is a front view of an exhaust device for a cooking appliance according to embodiment 1.

Fig. 2 is a perspective view of the exhaust device for a cooking utensil of embodiment 1.

Fig. 3 is a sectional view of the exhaust device for a cooking utensil of embodiment 1.

Fig. 4 is a sectional view showing an example in which the exhaust device for a cooking appliance is disposed for indoor circulation.

Fig. 5 is a sectional view showing an example in which the exhaust device for the cooking appliance is disposed for outdoor exhaust.

Fig. 6 is a circuit diagram for implementing the control of control example 1.

Fig. 7 is a circuit diagram for implementing the control of control example 2.

Fig. 8 is a circuit diagram for implementing the control of control example 3.

Fig. 9 is a front view of an exhaust device for a cooking utensil of embodiment 2.

Fig. 10 is a sectional view of an exhaust device for a cooking utensil of embodiment 2.

Fig. 11 is a circuit diagram for implementing the control of control example 4.

Fig. 12 is a sectional view of an exhaust device for a cooking utensil of embodiment 3.

Fig. 13 is a block diagram for explaining control of control example 5.

Fig. 14 is a front view of an exhaust device for a cooking utensil of embodiment 4.

Fig. 15 is a sectional view of the exhaust device for a cooking utensil of embodiment 4.

Fig. 16 is a block diagram for explaining a control system of control example 6.

Fig. 17 is a flowchart showing a control procedure of control example 6.

Fig. 18 is a block diagram for explaining a control system of control example 7.

Fig. 19 is a flowchart showing a control procedure.

Fig. 20 is a sectional view of the exhaust device for a cooking utensil of embodiment 6.

Fig. 21 is a sectional view of an exhaust device for a cooking utensil of embodiment 7.

Fig. 22 is a sectional view of an exhaust device for a cooking utensil of embodiment 8.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to only the following embodiments. Since the drawings are exaggeratedly illustrated for convenience of explanation, the dimensional ratios of the components in the drawings may be different from those in reality. In the description of the embodiments of the present invention, the same elements will be denoted by the same reference numerals and redundant description thereof will be omitted.

[ embodiment 1]

Exhaust device for cooking utensil

Fig. 1 is a front view of an exhaust device for a cooking utensil of embodiment 1, fig. 2 is a perspective view of the exhaust device for a cooking utensil of embodiment 1, and fig. 3 is a sectional view of the exhaust device for a cooking utensil of embodiment 1.

The exhaust device 101 for a cooking utensil of embodiment 1 includes a rack 11, a cooking chamber 12 provided on the rack 11, and a blower 20 provided on an upper portion of the cooking chamber 12.

Cooking chamber 12 is a space covered with front panel 13a with door 14, side panels 13b (both side surfaces), back panel 13c, and top panel 13 d. The front panel 13a covers only a portion where the blower 20 is provided and has a lower opening. A door 14 is openably and closably attached to the opening portion. The side plate 13b, the back plate 13c, and the top plate 13d are connected to a housing (described later) of the blower 20 without any gap. An indicator lamp 18 indicating the operating state of the blower 20 is provided on the front panel 13 a. Further, a warning lamp 18e indicating that a trouble has occurred in the exhaust device 101 for a cooking utensil is provided on the front panel 13a (the same applies to the other embodiments). The case where the warning lamp 18e is turned on is, for example, a case where an operation different from the control content is detected such that the blower 20 does not operate although the door 14 is opened, or conversely, the blower 20 is not stopped even when the door 14 is closed.

The door 14 slides up and down on the inner side of the front panel 13a, opens when manually lifted up by the handle 15, and closes when pulled down. A gasket 16 is provided at the lower end of the door 14. The gasket 16 is used to improve airtightness in the cooking chamber 12 when the door 14 is closed and to alleviate an impact when the door 14 is closed. The gasket 16 may be made of an elastic material such as rubber or resin, and is preferably made of a material having heat resistance and flame resistance.

A blower 20 is provided at an upper portion of the cooking chamber 12. The blower 20 exhausts the air inside the cooking chamber 12. The illustrated blower 20 includes a motor 21, a sirocco fan 22, and a housing 35 that houses these components. In blower 20, a sirocco fan 22 is attached to a shaft of motor 21, and rotation of motor 21 causes sirocco fan 22 to rotate, thereby sucking air in cooking chamber 12 and discharging the air from exhaust port 23. The blower 20 is not limited to such a configuration. For example, a propeller blower may also be used. The housing 35 may be formed by the common side plate 13b, the back plate 13c, the top plate 13d in the cooking chamber 12, or the like, instead of being a housing provided separately for the blower.

The blower 20 generates an air flow for discharging air inside the cooking chamber 12. A grease filter 30 is attached to an upper portion of the air flow upstream of the blower 20 in the cooking chamber 12 so as to cover the suction port of the blower 20. The grease filter 30 is provided to substantially remove grease from the air sucked by the blower 20 and to prevent the blower 20 from sucking large dust and the like.

Various filters are attached to the portion of the exhaust port 23 on the downstream side of the blower 20 so as to cover the exhaust port 23. From above, there are an air filter 31 for removing fine dust, garbage, a deodorizing filter 32 for removing odor, a smoke removing filter 33 for removing smoke, and an oil suction filter 34 for removing oil in this order. Preferably, all, but not all, of the four filters described above are installed. For example, the deodorizing filter 32 may be attached to avoid mixing of odor from food and the like during or before cooking into the exhaust gas.

The filter is attached to the downstream side of the blower 20, but is not limited to this position. Various filters may be installed, for example, on the upstream side of the blower 20 (e.g., the portion of the grease filter in the drawing).

A shutter 25 for closing the exhaust side is provided on the downstream side of each filter. By closing the shutter 25, the exhaust side in the cooking chamber 12 is closed. The shutter 25 may be electrically opened and closed, or may be opened and closed by an air flow. In the case of the electrically-driven shutter 25, the shutter is opened and closed in response to a signal from a control unit 50 described later. In the case of the shutter 25 that is opened and closed by the air flow, the shutter 25 is opened by the pressure of the air flow when the blower 20 is started, and is closed by the self-weight of the shutter 25 when the air flow disappears when the blower 20 is stopped. Therefore, the shutter 25 that is opened and closed by the air flow is opened when the blower 20 is operated and is closed when the blower 20 is stopped.

A fire alarm 41 and a fire extinguisher 42 are provided on the ceiling 13d of the cooking chamber 12 so as to face the inside of the cooking chamber 12. The fire alarm 41 detects a fire and issues an alarm. The fire alarm 41 is linked with the fire extinguisher 42 to spray the fire extinguishing agent at the same time as the fire alarm 41 issues an alarm. The fire extinguisher 42 is connected to a fire extinguishing agent case 43 provided on the back side (top plate back) of the top plate 13d viewed from the cooking chamber 12 to spray the fire extinguishing agent toward the inside of the cooking chamber 12. Since the cooking utensil exhaust device 101 is provided with the door 14, the inside of the cooking chamber 12 cannot be seen in a state where the door 14 is closed. Therefore, the fire alarm 41 and the fire extinguisher 42 are provided for dealing with a fire should occur inside the cooking chamber 12.

The fire alarm 41 may stop the blower 20 at the same time as the fire alarm is performed, for example. For this reason, the blower 20 may be forcibly stopped by, for example, shutting off a main switch, a breaker, or the like provided in the exhaust device 101 for a cooking appliance. In the case where the electric shutter is used as the shutter 25, the shutter 25 is closed while the control unit 50 stops the blower 20. The electric shutter is biased in a closing direction by a biasing force, and is electrically opened against the biasing force when the blower is operated. In this case, the motorized shutter is brought into the closed state by the action of the force when the power is off. In addition, an auxiliary battery for operating the electric shutter also at the time of power failure may be provided. This prevents or suppresses the situation where, in the unlikely event of a fire inside the cooking chamber 12, flames and smoke are discharged to the outside of the cooking chamber 12 through the exhaust passage.

The fire alarm 41 and the fire extinguisher 42 may be omitted. However, since the interior of the cooking chamber 12 is not visible as described above, it is preferable to install only the fire alarm 41.

A control unit 50 is provided at a portion covering an upper portion of the frame 35 of the blower 20 and corresponding to a ceiling back viewed from the cooking chamber 12. An opening/closing sensor 51 is attached to a portion of the door 14 that contacts the table 11. The open/close sensor 51 is connected to the control unit 50 through a signal line.

The control unit 50 operates the blower 20 based on a signal of the opening/closing sensor 51. The control contents will be described later. The circuit board and the like of the control unit 50 are preferably housed in the control box and fixed to the upper portion of the frame 35. The reason why the control unit 50 (or the control box) is disposed at this position is that the control unit 50 is provided in the vicinity of the blower 20, whereby wiring between them is easily performed at the time of construction. For example, the blower 20 and the housing 35 may be used together with, for example, an existing range hood. In this case, in the conventional hood, since the control unit 50 is present inside the housing 35 of the hood, the control unit 50 is disposed at such a position. Of course, the arrangement of the control unit 50 is not limited to such a position, and may be arbitrarily arranged.

The open-close sensor 51 detects the open-close state of the door 14. The door 14 is opened and closed by moving up and down. Therefore, the open/close sensor 51 detects the closed state of the door 14 when the lower end of the door 14 contacts the rack 11, and detects the open state of the door 14 when the lower end of the door 14 does not contact the rack 11. The time point at which the signal from the opening/closing sensor 51 is switched from closed to open is set as the time point at which the door 14 starts to open. When the door is moved from the fully closed state to the door opening direction, the time point at which the door operation is first detected by the open/close sensor may be set as the time point at which the door starts to be opened.

The opening/closing sensor 51 is disposed at a position that is easy to understand in the drawing for the purpose of explanation, but may be disposed at any position as long as it can detect the opening/closing of the door 14. In particular, the opening/closing sensor 51 can be disposed in the back portion of the ceiling of the cooking chamber 12 depending on the structure of the opening/closing sensor 51 to be used, and the wiring between the opening/closing sensor 51 and the control unit 50 can be facilitated.

The open/close sensor 51 may be, for example, a switch that is turned off (or on) when the lower end of the door 14 contacts the rack 11 and is turned on (or off) when the lower end of the door 14 is separated from the rack 11.

A full-open sensor 52 for detecting that the door 14 is fully opened may be provided according to the control content (details will be described later).

The full-open sensor 52 may be, for example, a switch that is turned on (or off) when the upper end of the door 14 contacts a position where the upper end of the door 14 contacts when fully open, and is turned off (or on) when the upper end of the door 14 is away from the position.

The open/close sensor 51 and the fully open sensor 52 may be, for example, an optical sensor, a magnetic sensor, or other proximity sensors, in addition to the switches. Further, the roller and the gear may be driven by the operation of the door 14, and the open/close state of the door 14 may be detected based on the amount of operation of the roller and the gear. When such an opening/closing sensor (opening sensor) such as a roller or a gear is used, the opening degree (the amount of door opening) of the door 14 is also known. The control of the usage opening will be described later.

A cooking utensil 200 is housed inside the cooking chamber 12. The cooking utensil 200 can house, for example, an electric fryer, a roaster, an electric cooker, a cooking pot for cooking, and further, various cooking robots. In the figures, an example of an electric fryer is shown.

In embodiment 1, a structure is shown in which the cooking utensil 200 (here, an electric fryer) is placed on the rack 11, but the present invention is not limited to this, and for example, in the case of an electric fryer, the structure may be such that an oil pan is partially embedded inside (downward) the rack 11. In the case of another cooking utensil 200, the whole or a part thereof may be embedded in the rack 11.

Although not shown, a main switch, a breaker, or the like for turning off or on the power to the cooking utensil exhaust device 101 may be provided (the same applies to other embodiments).

< setting example >

The exhaust device 101 for a cooking appliance can cope with both indoor circulation in which exhaust gas from the cooking chamber 12 circulates in a room and outdoor exhaust gas in which exhaust gas from the cooking chamber 12 is discharged to the outside of the room. The cooking utensil exhaust device 101 is provided in a room where cooking is performed using the cooking utensil 200 in the cooking chamber 12. Examples of the room to be installed include a shop such as a convenience store, a supermarket, a makeup shop, a restaurant, a department store, and an exhibition.

(indoor circulation example)

Fig. 4 is a sectional view showing an example in which the exhaust device for a cooking appliance is disposed for indoor circulation.

As shown in fig. 4, when the exhaust device 101 for a cooking appliance is disposed for indoor circulation, an exhaust duct 501 for indoor circulation is connected to the exhaust port 23 of the blower 20. The exhaust duct 501 for indoor circulation is disposed in a portion corresponding to the ceiling back of the cooking chamber 12, and exhausts air from the upper portion of the front panel 13a into the room. For this purpose, an exhaust port 502 connected to an exhaust duct 501 is provided in an upper portion of the front panel 13 a.

When the cooking device 200 is circulated in the room, the air from the cooking chamber 12 is discharged into the room in which the cooking device exhaust device 101 is installed. Odor emitted from the cooking chamber 12 is removed by the deodorizing filter 32. Therefore, in the indoor circulation, it is possible to prevent or suppress odor from the cooking chamber 12 from floating in the room.

In the case of an indoor cycle, air for heating or cooling in a room in which the cooking utensil exhaust device 101 is provided is directly returned to the room without being discharged to the outside of the room. When the indoor circulation is performed in this way, energy loss of the air conditioner can be reduced, and therefore energy saving can be achieved for the entire room in which the cooking chamber 12 is installed.

Here, although the example in which the cooking utensil exhaust device 101 is provided along the wall portion 500 is shown, the cooking utensil exhaust device 101 may be provided apart from the wall portion 500. In addition, the exhaust passage 501 may exhaust not from the front but from the side, the back, or from above.

(outdoor exhaust example)

Fig. 5 is a sectional view showing an example in which the exhaust device for the cooking appliance is disposed for outdoor exhaust.

As shown in fig. 5, when the cooking utensil exhaust apparatus 101 is disposed for outdoor exhaust, an outdoor exhaust duct 503 is connected to the exhaust port 23 of the blower 20. The exhaust duct 503 is extended to the outside by a device opening or the like provided in a wall portion 500 or the like of a room in which the exhaust device 101 for a cooking utensil or the like is provided, in order to directly exhaust air to the outside.

When the air is exhausted outdoors, the air from the cooking chamber 12 is discharged to the outside of the room where the cooking utensil 200 is housed in the cooking utensil exhaust device 101. Therefore, in the case of outdoor exhaust, it is possible to prevent or suppress the odor discharged from the cooking chamber 12 from scattering indoors.

In the case of outdoor exhaust, particularly, in the case of outdoor exhaust, various filters including the deodorizing filter 32 may not be provided, but it is preferable to provide these filters in consideration of influence on neighbors.

Further, in outdoor exhaust, the exhaust device 101 for a cooking utensil may be provided apart from the wall portion 500. However, in outdoor air discharge, it is necessary to connect the exhaust duct 503 to a device opening or the like in a wall surface to discharge air to the outside of a room.

< control example >

As a control example, the open/close state of the door 14 and the control of the blower 20 corresponding thereto will be described.

(control example 1)

Control example 1 is a control example in which the blower 20 is stopped when the door 14 is closed, and the blower 20 is operated at a constant air volume after the door 14 starts to be opened.

Fig. 6 is a circuit diagram for implementing the control of control embodiment 1.

The control example 1 is configured as a simple configuration as follows: as the motor 21 of the blower 20, a single-phase ac motor m (ac) is used, and as the opening/closing sensor 51, for example, a button switch of a b-contact is used. Therefore, in control example 1, the switch of the open/close sensor 51 also serves as the control unit 50. A capacitor C for determining the rotation direction is connected to the single-phase ac motor. In the case of control example 1, the full open sensor 52 may not be provided.

In control example 1, a push-button switch having a b-contact is connected to one of the wirings for connecting the motor 21 and the AC power supply AC (e.g., 100V commercial power supply). Further, an indicator lamp 18 is connected between the motor 21 and the AC power supply AC. The indicator lamp 18 is turned on when current flows through the wiring between the motor 21 and the ac power supply.

The button switch of the b-contact is disposed at a position sandwiched between the lower end of the door 14 and the stand 11. When the door 14 is closed, the button of the push switch is pressed to be turned off. When the door 14 is slightly opened and its lower end is removed from the stand 11, the button is restored to on. The time point at which the switch (signal from the open/close sensor 51) is turned from off to on is the time point at which the door 14 starts to open.

The switch of the open/close sensor 51 is turned on when the door 14 is opened, and the motor 21 is rotated at the same time as the switch is turned on, thereby starting the air discharge by the blower 20. At this time, the air volume of the blower 20 is set so that the air velocity at the opening portion by the door 14 becomes 0.2m/s or more when the door 14 is fully opened. For example, it is preferable that the wind speed at the opening be measured at a plurality of locations on the plane of the opening so that the wind speed at all the measurement points be 0.2m/s or more (the same applies to other examples). By setting the wind speed to such a value, it is possible to prevent or suppress leakage of odor caused by opening of the door 14 in a state where the door 14 is opened (after starting opening).

In control example 1, the motor 21 is not operated in a state where the door 14 is closed. That is, when the door 14 is closed, the operation of the blower 20 is stopped. Therefore, when it is not necessary to touch the food in the cooking chamber 12 or the cooking utensil 200 during cooking, the door 14 can be closed to stop the supply of electric power to the blower 20. This can reduce the amount of power consumed as compared with a conventional device that operates the blower all the time.

In control example 1, the motor 21 is started while the door 14 is opened. Therefore, the time from the start of the motor 21 to the predetermined rotation speed (the wind speed at the opening when the door 14 is fully opened is 0.2m/s or more) is short, but there is a possibility that odor leakage may occur. However, the amount of such leakage is small to the extent that it does not drift in the room, and therefore the odor suppressing effect is sufficient.

Further, when the door 14 is in the closed state, the gasket 16 improves the sealing degree in the cooking chamber 12, thereby preventing leakage of odor.

The energy saving effect will be described with specific examples.

For example, in the case of a cooking appliance in which the door 14, a panel covering the periphery of the cooking appliance 200, or the like is not provided, the odor is prevented from being scattered in the room by performing the exhaust at all times. In the case of such a cooking appliance, the required exhaust air volume is 600m³H is used as the reference value. In the case of making 25 times fried food by working for 16h every day (24h), the total exhaust gas amount is 8000m³Day/day.

On the other hand, in the case of control example 1 in embodiment 1, the time for opening the door 14 to exhaust air is the time for taking out the fried food and putting down a batch of the fried food, and is 5 minutes. When 25 times of frying was performed, the time was 125min (2.1h) at 5min × 25. The exhaust air volume is set to 100m ³In the case of/h, the total displacement is 210m³Day/day.

Thus, in embodiment 1, the exhaust air volume can be reduced to 210/8000 × 100 — 2.6%. Therefore, the power consumption for exhausting the gas in the exhaust device 101 for a cooking appliance can be reduced.

Further, even when the cooking utensil exhaust device 101 exhausts air when the door is opened, the cooking utensil 200 is located in the cooking chamber 12 covered with the panel, and therefore the exhaust air volume can be reduced compared to the case where the door is opened. Therefore, the exhaust device 101 for a cooking utensil can reduce the size of the blower 20, and the power consumption of the device can be reduced accordingly.

Further, in the exhaust device 101 for a cooking utensil, since the exhaust air volume is reduced, the fouling of the filter is also reduced, and the filter replacement cycle is lengthened. In addition, the life of the filter is also increased. Therefore, the exhaust device 101 for a cooking appliance can also contribute to reduction in running cost.

Although not shown in the circuit diagram, when the shield 25 is an electric shield, it is preferable that the wiring is arranged so that the electric shield can be opened and closed in synchronization with the energization and deenergization of the motor 21 of the blower 20 (the same applies to other embodiments).

(control example 2)

Control example 2 is a control example in which blower 20 is operated at the first air volume when door 14 is in the closed state, and blower 20 is operated at the second air volume after door 14 starts to be opened. Here, the first air volume < the second air volume, and the second air volume is an air volume in which the air velocity at the opening portion generated by the door 14 becomes 0.2m/s or more when the door 14 is fully opened. Here, the first air volume is preferably an air volume that causes the inside of the cooking chamber 12 to be a negative pressure by exhausting air in the cooking chamber 12.

Fig. 7 is a circuit diagram for implementing the control of control example 2.

The control example 2 is configured as a simple configuration as follows: as the motor 21 of the blower 20, a single-phase ac motor m (ac) is used, and as the opening/closing sensor 51, for example, a two-contact push switch is used. Therefore, in control example 2, the switch of the open/close sensor 51 also serves as the control unit 50. The single-phase ac motor m (ac) can change the rotation speed of the motor 21 by supplying electric power to the wires having different numbers of windings of the motor coil.

In control example 2, the wiring for the motor generating the first air volume is Lo, and the wiring for the motor generating the second air volume is Mi.

A two-contact push button switch as the opening and closing sensor 51 is provided at a position sandwiched between the lower end of the door 14 and the stand 11. When the door 14 is closed, the button of the push switch is pressed to turn on the wiring Lo side. On the other hand, when the door 14 is opened, the wiring Mi side is turned on.

Further, an indicator lamp 18a and an indicator lamp 18b are connected to each of the wiring Lo and the wiring Mi. The indicator light 18a and the indicator light 18b are different color lights. Instead of the indicator light, a display panel that displays "standard" air volume, "strong" air volume, or the like may be provided, and the display may be switched in accordance with the operation of each switch.

In control example 2, the motor 21 is operated at the first air flow rate with the door 14 closed. Then, the second air volume becomes the second air volume with a larger air volume at the time point of switching. Accordingly, the air inside the cooking chamber 12 is also discharged in a state where the door 14 is closed. After the door 14 starts to open, the motor 21 increases the speed to the second air flow rate so that the air flow rate matches the air flow rate when the door is fully opened.

The difference between the first air volume and the second air volume is, for example, about 1 to 60% of the first air volume when the second air volume is 100%. If the ratio of the first air volume to the second air volume exceeds 60%, the difference therebetween approaches, and the energy saving effect is reduced. On the other hand, if the first air volume is 1% or less, the negative pressure in the cooking chamber 12 cannot be always set in a state where the door 14 is closed.

In this way, in control example 2, since the air in the cooking chamber 12 is always discharged with a small air volume, no odor leakage occurs even at the moment when the door 14 starts to open. On the other hand, the first air volume can be generated by rotating the motor at a low speed compared to the second air volume, and therefore, the power consumption can be reduced accordingly.

In addition, in control example 2, since the inside of the cooking chamber 12 is made negative pressure even when the door is closed, even if the gasket 16 is not provided and a minute gap is formed when the door 14 is closed, leakage of odor can be prevented.

(control example 3)

Control example 3 is a control example using full-open sensor 52 of door 14, and is a control example in which blower 20 is stopped when door 14 is in the closed state, blower 20 is operated at the third air flow rate during the period from the start of opening door 14 to full opening, and blower 20 is operated at the second air flow rate after door 14 is fully opened. Here, the first and second liquid crystal display panels are,

the second air volume < the third air volume, and the second air volume is an air volume in which the wind speed at the opening portion by door 14 becomes 0.2m/s or more when door 14 is fully opened.

Fig. 8 is a circuit diagram for implementing the control of control example 3.

The control example 3 is configured to have a simple configuration as follows: as the motor 21 of the blower 20, a single-phase ac motor m (ac) is used, and for example, a button switch of the b-contact is used for the open/close sensor 51 and a two-contact switch is used for the full-open sensor 52. Therefore, in control example 3, the switches of the open/close sensor 51 and the full open sensor 52 also serve as the control unit 50. The single-phase ac motor m (ac) can change the rotation speed of the motor 21 by supplying electric power to the wires having different numbers of windings of the motor coil.

In control example 3, the wiring for the motor generating the second air flow rate is Mi, and the wiring for the motor generating the third air flow rate is Hi. The difference between the second air volume and the third air volume is preferably about 120 to 160% of the third air volume when the second air volume is 100%. The third air flow rate may be larger than the air flow rate when the door is fully opened, but if the third air flow rate is smaller than 120%, the amount of air actually taken in does not change much even if the air flow rate is increased, and therefore, it is meaningless. On the other hand, if the air volume is increased to exceed 160%, the amount of air sucked increases, but since air volume lower than this can sufficiently suck air, power consumption increases and becomes excessive.

A b-contact push switch as the opening/closing sensor 51 is provided at a position sandwiched between the lower end of the door 14 and the stand 11. When the door 14 is slightly opened and the lower end thereof is separated from the stage 11, the push button of the push switch is restored to be turned on. At this time, the two-contact switch of the fully-open sensor 52 is switched to the wiring Hi side. Therefore, when the switch of the opening/closing sensor 51 is turned on, the current flows through the wiring Hi side of the motor 21 to start the motor 21 and the third air flow is controlled.

After that, the switch of the fully-open sensor 52 is switched to the wiring Mi side in accordance with the full-opening of the door 14. At this time, the switch of the opening/closing sensor 51 is kept on. Thus, after the door is fully opened, the current flows through the wiring Mi side of the motor 21 and the second air flow is controlled.

Further, an indicator lamp 18b and an indicator lamp 18c are connected to the wiring Mi and the wiring Hi, respectively. The indicator light 18b and the indicator light 18c are different color lights. Instead of the indicator light, a display panel that displays "standard" air volume, "strong" air volume, or the like may be provided, and the display panel may be switched to display in accordance with the operation of each switch.

In this control example 3, the motor 21 is stopped with the door 14 closed. Therefore, odor may be accumulated in the cooking chamber 12. When the door 14 starts to open, the odor inside the cooking chamber 12 is discharged at a burst with the third air flow rate to prevent the odor from leaking. Even if the door 14 is fully opened and then the second air flow rate is achieved, most of the odor inside the cooking chamber 12 can be exhausted, and thus no leakage of odor occurs.

In control example 3, similarly to control example 2, the exhaust may be performed constantly at the first air flow rate which is smaller than the second air flow rate even in the state where the door 14 is closed. In this case, the wiring Lo of the motor 21 is used. The ratio of the first air volume, the second air volume, and the third air volume may be, for example, 10 to 30% of the first air volume and 50 to 60% of the second air volume, where the third air volume is 100%.

In the above control examples 1 to 3, instead of the ac motor, software control using, for example, a dc motor, a converter, and a control computer (cpu (central Processing unit) or mpu (micro Processor unit)) may be used. By using the dc motor, the power consumption can be further reduced.

Although not shown, the cooking utensil exhaust device 101 may be provided with an opening sensor for detecting how far the door 14 is opened, and the air volume of the blower 20 may be changed according to the opening of the door 14. In this case, when the air volume of the blower 20 is changed in stages, for example, current is caused to flow through the wirings Lo, Mi, and Hi of the motor each time the opening degree of the door 14 is increased in stages. When the air volume of the blower 20 is continuously changed with respect to the opening degree of the door 14, for example, the dc motor is supplied with the variable pressure from the inverter so as to match the opening degree of the door 14.

[ embodiment 2]

Embodiment 2 is designed such that: the door 14 is opened and closed manually, but a lock portion for locking the door 14 is provided to restrict the opening and closing of the door 14, and the operation of the blower 20 is controlled in accordance with the opened and closed state of the door 14.

Exhaust device for cooking utensil

Fig. 9 is a front view of an exhaust device for a cooking utensil of embodiment 2, and fig. 10 is a sectional view of the exhaust device for a cooking utensil of embodiment 2.

The cooking utensil exhaust device 102 of embodiment 2 is provided with a lock 55 for maintaining the closed state of the door 14 and an open button 17 for giving an instruction to open the door 14. Other configurations are the same as those in embodiment 1, and an installation example in the case of performing indoor circulation or outdoor exhaust is also the same as that in embodiment 1, and therefore, description thereof is omitted. The cooking method is also the same as that in embodiment 1, and therefore, the description thereof is omitted.

In embodiment 2, the provision of the lock portion 55 enables the door 14 to be opened manually only when a predetermined condition is satisfied by the control of the control portion 50 when an opening instruction is issued from the open button 17 to the door 14 to be opened manually. The locking portion 55 is configured to insert the latch into a hole (including a recess) provided in the door 14 in a state where the door 14 is closed, for example. The latch is operated by, for example, an electromagnetic solenoid, and the electromagnetic solenoid is operated in accordance with a command from the control unit 50. The form of the lock portion 55 is not limited to the form using the latch or the electromagnetic solenoid.

The on button 17 is, for example, a push switch, a touch sensor switch, or the like, and is provided on the front panel 13 a. The opening and closing of the door 14 is finally performed by hand. Therefore, in other words, the open button 17 is a switch that requests permission to open the door 14 to the control unit 50.

In addition, indicator lamps 19a and 19b are provided on the front panel 13a to indicate whether the door 14 can be opened or closed. For example, the design is made such that the door 14 can be opened when the indicator lamp 19a is turned on in blue, and the door 14 cannot be opened when the indicator lamp 19b is turned on in red. Instead of the indicator light, a display panel that displays the opening of the door 14 as "allowed" or "not allowed" may be provided.

< control example >

(control example 4)

A control example (referred to as control example 4) of embodiment 2 is designed such that: the blower 20 is started while an opening instruction is issued from the open button 17, and after a predetermined time has elapsed, the lock is released to allow the door 14 to be opened.

Fig. 11 is a circuit diagram for implementing the control of control example 4.

In control example 4, a single-phase alternating-current motor m (ac) was used as the motor 21 of the blower 20. The open button 17 is provided on a wiring Mi from an alternating current power supply (AC) to the motor 21 in conjunction with the switch of the open/close sensor 51. The open button 17 and the switch of the opening/closing sensor 51 are turned on together by inputting an open instruction from the open button 17. On the other hand, when the open/close sensor 51 is turned off from on, the open button 17 is also turned off.

A Timer (TM)57 is provided in a wiring branched from the wiring Mi, and an electromagnetic solenoid 58 of the lock portion 55 is connected to the wiring. Further, an output from the timer 57 is also connected to the indicator lamp 19 a.

Here, the timer 57 is set to count a predetermined time before power is supplied, and to supply power to the electromagnetic solenoid 58 after the predetermined time elapses. The timer 57 is not limited to a configuration for measuring time, and may be a current delay circuit. The timer 57 is set to a time at which the blower 20 is started and the odor in the cooking chamber 12 can be exhausted. This time is preferably a time at which air corresponding to the volume inside the cooking chamber 12 can be discharged approximately. Specifically, the time is different depending on the volume of the cooking chamber 12 and the performance of the blower 20, but it is sufficient if it is 1 to 60 seconds.

The electromagnetic solenoid 58 is, for example, an alternating current type electromagnetic solenoid 58, and is of a normally open spring return type (in a state where the current is cut off, the valve body is separated (at this time, the latch of the lock portion 55 is extended and locked), and when the current flows, the valve body is closed (at this time, the latch of the lock portion 55 is pulled and unlocked)).

In control example 4, the open/close sensor 51 and the timer 57 serve as the control unit 50.

In control example 4, the open button 17 is turned off together with the switch of the open/close sensor 51 (the state shown in the drawing) in the state where the door 14 is closed. In this state, when the open button 17 is pressed and an open instruction is input, the open button 17 is turned on together with the switch of the open/close sensor 51, and the motor 21 is operated. The air volume at this time is the second air volume (the full open air velocity is 0.2m/s or more) described in embodiment 1. At the same time, a current flows through the timer 57 and the timer counts a predetermined time. After the predetermined time is counted, a current flows from the timer 57 to the electromagnetic solenoid 58 to unlock the lock portion 55. At the same time, the indicator lamp 19a is energized and lit, indicating that door opening is permitted.

Thereafter, the door 14 is manually opened. The exhaust is continued by the second air volume also after the door 14 is opened.

When the opened door 14 is closed, the opening button 17 which is interlocked when the switch of the opening/closing sensor 51 is turned off due to the closing of the door 14 is also turned off. Accordingly, the power supply to the electromagnetic solenoid 58 is also cut off, and therefore the latch is returned by the spring and the door 14 is locked by the lock portion 55. At the same time, the blower 20 is stopped because the power to the motor 21 is also cut off. The indicator lamp 19b is turned on by energization, indicating that the door 14 is locked.

As described above, according to control example 4, when door 14 is to be opened, first, by pressing open button 17, the inside of cooking chamber 12 is exhausted. At this time, the lock portion 55 is not unlocked, and thus the door 14 cannot be opened. After the inside of the cooking chamber 12 is exhausted, the door 14 can be opened. Therefore, since most of the odor in the cooking chamber 12 is exhausted at the time point when the door 14 is actually opened, the odor does not leak when the door 14 is opened. On the other hand, when the door 14 is closed, the blower 20 is stopped. Therefore, the exhaust device 102 for a cooking appliance does not generate power consumption by the blower 20 in a state where the door 14 is closed.

In control example 4, software control using, for example, a dc motor, a converter, and a control computer (CPU, MPU) may be used instead of the ac motor. By using the dc motor, the power consumption can be further reduced.

In embodiment 2, in addition to control example 4, control example 2 of embodiment 1 may be combined so that the exhaust is continued at the first air flow rate at all times in the door closed state. In addition, the control example 3 may be combined to control the air flow rate to be the third air flow rate during the period from the input of the instruction to open the door to the unlocking of the lock portion 55, and to control the air flow rate to be the second air flow rate after the unlocking of the lock portion 55 (or after the detection of the opening of the door 14 by the open/close sensor 51).

In embodiment 2, the inside of cooking chamber 12 is exhausted until lock portion 55 is unlocked after an instruction to open the door is input. Therefore, at such a time point that the door 14 can be opened, the odor is substantially eliminated from the inside of the cooking chamber 12 depending on the food material and the cooking contents. Assuming such a case, the control is designed, for example, to: the air is discharged at the third air flow rate (or at the second air flow rate for a time longer than the third air flow rate, etc.) until the lock portion 55 is unlocked after the instruction to open the door is input, and the blower 20 is stopped after the predetermined time has elapsed. At this time, although the blower 20 is stopped even when the door 14 is opened, since the odor is substantially eliminated from the cooking chamber 12 depending on the food and the cooking contents as described above, the odor hardly disperses. Thus, in embodiment 2, power consumption can be further reduced.

[ embodiment 3]

Embodiment 3 is designed in the same manner as embodiment 2: although the door 14 is opened and closed manually, a lock portion 55 for locking the door 14 is provided to restrict the opening and closing of the door 14, and the operation of the blower 20 is controlled in accordance with the opened and closed state of the door 14.

Exhaust device for cooking utensil

Fig. 12 is a sectional view of an exhaust device for a cooking utensil of embodiment 3.

The exhaust device 103 for a cooking appliance according to embodiment 3 is provided with a cooking chamber state detection sensor (hereinafter referred to as a state sensor 61) for detecting a state in the cooking chamber 12 inside the cooking chamber 12. The other configuration is the same as embodiment 2, and the installation example in the case of performing indoor circulation or outdoor exhaust is also the same as embodiment 1, and therefore, the description thereof is omitted. The cooking method is also the same as that in embodiment 1, and therefore, the description thereof is omitted.

The state sensor 61 detects at least one of odor in the cooking chamber 12, temperature in the cooking chamber 12, oil in the air, smoke, and pressure in the cooking chamber 12 as a state in the cooking chamber 12.

In embodiment 3, the control unit 50 unlocks the lock unit 55 when the detection value detected by the state sensor 61 is equal to or less than a predetermined reference value.

The odor is detected by a so-called odor sensor. As the odor sensor, various types of sensors such as a semiconductor type sensor, a crystal oscillator type sensor, a FET biosensor (Field Effect biosensor), a film type surface stress sensor, and the like are commercially available, and therefore, the odor sensor may be used as the above-mentioned sensor. The control unit 50 compares the value of the odor sensor with a reference value, and unlocks the lock portion 55 when the odor is equal to or less than the reference value.

The temperature is detected by a temperature sensor. The temperature sensor may be any known (commercially available) sensor such as an analog sensor or a digital sensor. The control unit 50 compares the value of the temperature sensor with a reference value, and unlocks the locking unit 55 when the temperature is equal to or lower than the reference value. The principle is that the temperature in the cooking chamber 12 is lowered when the blower 20 is operated, and therefore, it is assumed that the odor in the cooking chamber 12 is exhausted and the locking portion 55 is unlocked.

The oil component in the air is obtained by detecting the oil component contained in the air, which is called oil mist, for example. The principle is that when the blower 20 is operated, the oil in the air in the cooking chamber 12 is also discharged, and therefore, it is determined that the odor is also dissipated by the decrease in the oil, and the lock portion 55 is unlocked.

Smoke is detected by a smoke sensor. As the smoke sensor, a commercially available sensor such as an optical sensor may be used. The principle is that smoke in the cooking chamber 12 is also discharged when the blower 20 is operated, and therefore, it is assumed that odor is also dissipated due to the reduction of smoke, and the lock portion 55 is unlocked.

The pressure is detected by a pressure sensor. The pressure sensor may be a commercially available sensor such as an optical sensor. The principle is that when the blower 20 is operated with the door 14 closed, the pressure in the cooking chamber 12 is lowered. When the pressure is equal to or lower than the reference value, it is considered that the odor is also discharged, and the lock portion 55 is unlocked. The reference value of the pressure may be set to a value lower than the normal atmospheric pressure, for example, or the pressure inside and outside the cooking chamber 12 may be compared by providing a pressure sensor for separately measuring the pressure outside the cooking chamber or a sensor for detecting the pressure difference inside and outside the cooking chamber, and the lock portion 55 may be unlocked at the time point when the pressure inside the cooking chamber 12 is reduced (or at the time point when the pressure difference is equal to or greater than a certain ratio).

< control example >

Control example 5

A control example (referred to as control example 5) of embodiment 3 is designed such that: the blower 20 is activated while an opening instruction is issued from the open button 17, and after a predetermined time has elapsed, the lock is released to allow the door 14 to be opened.

Fig. 13 is a block diagram for explaining control of control example 5.

In control example 5, a signal from the state sensor 61 is input to the control IC62, and the value detected by the state sensor (Sen)61 is compared with a predetermined reference value in the control IC 62. When the detected value is equal to or less than the reference value, the control IC62 causes a current to flow to the electromagnetic solenoid 58. The control IC62 compares the voltage input from the state sensor 61 with a reference voltage, for example. The current is compared with the reference current when the current is input from the state sensor 61. When a digital Signal is input from the state sensor 61, a dsp (digital Signal processor) is used as the control IC62 to compare the digital value. Although not shown, the control IC62 and the state sensor 61 use power converted from ac to dc. The other circuit configuration is the same as that of control example 4, and therefore, the description thereof is omitted.

In control example 5, the control IC62 serves as the control unit 50.

In control example 5, the open button 17 and the switch of the open/close sensor 51 are both turned off (shown) when the door 14 is closed. In this state, when the open button 17 is pressed and an open instruction is input, the open button 17 is turned on together with the switch of the open/close sensor 51 to operate the motor 21. The air volume at this time is the second air volume (the full open air velocity is 0.2m/s or more) described in embodiment 1.

Then, the control IC62 compares the detected value with a reference value, and causes a current to flow to the electromagnetic solenoid 58 when the detected value is equal to or less than the reference value. Current flows through the electromagnetic solenoid 58 to unlock the lock portion 55. At the same time, the indicator lamp 19a is energized and lighted, indicating that door opening is permitted.

Thereafter, the door 14 is manually opened. The exhaust is continued by the second air flow rate also after the door 14 is opened.

When the opened door 14 is closed, the switch of the open/close sensor 51 is turned off by the closing of the door 14, and the linked open button 17 is also turned off. Accordingly, the power supply to the electromagnetic solenoid 58 is also cut off, and therefore the latch is returned by the spring and the door 14 is locked by the lock portion 55. At the same time, the blower 20 is stopped because the power to the motor 21 is also cut off. The indicator lamp 19b is turned on by energization, indicating that the door 14 is locked.

As described above, according to control example 5, when the door 14 is to be opened, the inside of the cooking chamber 12 is first exhausted by pressing the open button 17. After the state sensor 61 has confirmed that the inside of the cooking chamber 12 is exhausted, the door 14 can be opened. Therefore, since most of the odor in the cooking chamber 12 is exhausted at the time point when the door 14 is actually opened, the odor does not leak when the door 14 is opened. On the other hand, when the door 14 is closed, the blower 20 is stopped. Therefore, power consumption by the blower 20 is not generated in the state where the door 14 is closed.

In control example 5, software control using, for example, a dc motor, a converter, and a control computer (CPU, MPU) may be used instead of the ac motor. By using the dc motor, the power consumption can be further reduced.

In embodiment 5, in addition to control example 5, control example 2 of embodiment 1 may be combined so that the exhaust is continued at the first air flow rate at all times in the door closed state. In addition, the control example 3 may be combined to control the air flow rate to be the third air flow rate during the period from the input of the instruction to open the door to the unlocking of the lock portion 55, and to control the air flow rate to be the second air flow rate after the unlocking of the lock portion 55 (or after the detection of the opening of the door 14 by the open/close sensor 51).

In embodiment 3, the state sensor 61 monitors the inside of the cooking chamber 12 until the lock portion 55 is unlocked after an instruction to open the door is input, and the lock portion 55 is unlocked after the dissipation of odor (or the reduction of odor) is confirmed. Therefore, in embodiment 3, depending on the food or the cooking content, the air may be exhausted at the third air flow rate (or at the second air flow rate for a longer time than the third air flow rate, or the like) until the lock portion 55 is unlocked after the instruction to open the door is input, and the blower 20 may be stopped together with the unlocking of the lock portion 55 as long as the odor is dissipated. As described above, since the odor is substantially eliminated from the cooking chamber 12 according to the difference in the food and the cooking contents, the odor hardly scatters. This can further reduce power consumption.

[ embodiment 4]

Embodiment 4 is designed such that: the door 14 is fully automatically opened and closed, and the operation of the blower 20 is controlled in accordance with the opened and closed state of the door 14.

Exhaust device for cooking utensil

Fig. 14 is a front view of an exhaust device for a cooking utensil of embodiment 4. Fig. 15 is a sectional view of the exhaust device for a cooking utensil of embodiment 4.

The exhaust device 104 for a cooking appliance according to embodiment 4 includes an opening/closing power unit 70 for opening and closing a door. The cooking utensil exhaust device 104 has an open button 17a and a close button 17b for giving instructions to open and close the door. The other structure is the same as embodiment 3. However, in embodiment 4, the locking portion 55 is not required. Note that, since the installation example in the case of performing indoor circulation or outdoor exhaust is also the same as that in embodiment 1, the description thereof is omitted. Since the cooking method is also the same as that of embodiment 1, the description thereof is omitted.

The open/close sensor 51 and the full open sensor 52 may be provided or not. When the open/close sensor 51 and the full open sensor 52 are provided, the open/close state and the full open of the door 14 are detected based on signals from these sensors. When the opening/closing sensor 51 and the full-opening sensor 52 are not provided, the opening/closing motor is automatically stopped when a load applied to the opening/closing power unit 70 (specifically, the opening/closing motor) becomes high. In the figure, the open/close sensor 51 and the full open sensor 52 are not provided.

The opening/closing power unit 70 is shown in a rack-and-pinion configuration in the drawing. A rack 72, a pinion 73 engaged with the rack 72, and an opening/closing motor 74 are disposed on both inner side portions of the door 14. The opening/closing motor 74 is driven by control from the control unit 50 to open and close the door 14. The opening/closing power unit 70 is not limited to this, and various types such as a chain lifter and a ball screw may be used.

Further, an indicator lamp 18 indicating the operation state of the blower 20 is provided. The indicator lamp 18 is turned on to indicate that the blower is in operation, and turned off to indicate that the blower is in stop.

< control example >

(control example 6)

The control example of embodiment 4 (referred to as control example 6) is designed such that: the door 14 is opened by an opening instruction from the open button 17a, and the door 14 is closed by a closing instruction from the close button 17 b. During which the action of the blower is controlled.

Fig. 16 is a block diagram for explaining a control system of control example 6.

In control example 6, a Direct Current (DC) motor is used as the motor 21 of the blower 20. The control unit 50 controls the dc motor so as to correspond to the open/close state of the gate 14. The control unit 50 includes a converter 701 that supplies a dc voltage to the dc motor, and a control computer 702 that controls the output voltage of the converter 701 together with the opening and closing of the gate 14.

The converter 701 converts Alternating Current (AC) from an alternating current power supply into Direct Current (DC). The converter 701 changes the output voltage (DC) in a stepless or stepwise manner based on a command from the control computer 702. The dc motor changes the rotational speed in accordance with the supplied dc voltage.

The control computer 702 is, for example, a small computer, and is a device control computer called a so-called microcomputer (abbreviated as a microcomputer or the like). Such a control computer 702 includes a CPU711, a ROM712 in which programs to be executed by the CPU711 are stored, and a RAM713 which is a work area of the CPU 711. The control computer 702 includes a nonvolatile memory 714 (e.g., an EPROM, a flash memory, etc.) in which programs, parameters (e.g., a reference value, a predetermined time), and the like are stored, and is similar in structure to a general-purpose computer.

The control computer 702 is connected to the open button 17a, the close button 17b, and the opening/closing operation unit. The door 14 is opened and closed according to an instruction from the open button 17a or the close button 17b, and the rotation speed of the motor 21 is controlled. The indicator lamp 18 is connected to the control computer 702, and the control computer 702 simultaneously turns on the indicator lamps 18 when the blower 20 is operated. The indicator lamp 18 may be connected to a wiring of the motor 21 and turned on by a current flowing through the motor 21.

Fig. 17 is a flowchart showing a control procedure of control example 6.

The CPU711 executes a program created based on this procedure to control the operation of the blower 20 together with the opening and closing operation of the door 14.

Before explaining the control sequence, the air volume will be described. In control example 6, the first air volume < the second air volume < the third air volume is set. The ratio of the air flows is, for example, 10 to 30% for the first air flow and 30 to 60% for the second air flow when the third air flow is set to 100%. The air flow at the time of fully opening the door is set to a second air flow so that the air speed at the opening portion is 0.2m/s or more.

The control sequence will be explained.

The CPU711 waits for the input of the open button 17a until the open button 17a is pressed in the state where the door 14 is closed (S11).

When the on button 17a is pressed to generate an input (yes in S11), the CPU711 instructs the converter 701 to output a voltage for generating the third air volume (S12). The motor 21 is stopped (or may be operated at the first air flow rate) in a state where the door 14 is closed. Here, motor 21 of blower 20 is started based on the voltage from converter 701, and blower 20 is operated at the third air flow rate. At S12, the indicator lamp 18 is simultaneously turned on (the blower 20 continues to be turned on when operating at the first air flow rate in the closed state).

Next, the CPU711 starts timing while issuing an instruction to the converter 701 (S13). The CPU711 determines whether or not a predetermined time has elapsed (S14). Here, the predetermined time is a time at which the fan 20 is activated and the odor in the cooking chamber 12 can be exhausted. For this reason, it is preferable to set a time period for which air corresponding to the volume in the cooking chamber 12 can be substantially discharged.

Next, when the predetermined time has elapsed (yes in S14), the CPU711 instructs the converter 701 to output a voltage for generating the second air flow (S15). The motor 21 of the blower 20 is decelerated in accordance with the voltage from the converter 701, and the blower 20 is operated at the second air flow rate.

Next, the CPU711 gives a command to the opening/closing power unit 70 to open the door 14 (S16). In response to this command, the opening/closing motor 74 rotates in a direction to open the door 14. The opening/closing motor 74 is automatically stopped when the door 14 is fully opened.

Next, the CPU711 waits for input of the off button 17b (S17). Here (the door 14 is in the opened state), when the close button 17b is pressed to generate an input (yes in S17), the CPU711 gives a command to the opening/closing power unit 70 to close the door 14 (S18). In response to this command, the opening/closing motor 74 rotates in a direction to close the door 14. The opening/closing motor 74 is automatically stopped when the door 14 is fully closed.

Next, the CPU711 issues an instruction to stop the voltage output (or output a voltage for generating the first air volume) to the converter 701 (S19). In response to the stop of the voltage output from the converter 701, the motor 21 of the blower 20 is stopped, and the blower 20 is stopped (or decelerated and operated at the first air flow rate). Thereafter, the process returns to S11.

In this way, according to control example 6, when the door 14 is to be opened, the inside of the cooking chamber 12 is exhausted by pressing the open button 17 a. After that, when a predetermined time has elapsed, the door 14 is automatically opened. Therefore, since most of the odor in the cooking chamber 12 is exhausted at the time point when the door 14 is opened, the odor does not leak. On the other hand, when the close button is pressed, the door 14 is automatically closed and the blower 20 is stopped (or the blower 20 has the first air flow rate). Therefore, power consumption by the blower 20 is not generated in the state where the door 14 is closed.

In control example 6, the airflow rate after the on button 17a is pressed and the input is generated may be the second airflow rate. Further, control using an ac motor may be performed.

In the control example 6, since the dc motor is controlled by the control computer 702, the rotation speed of the dc motor may be continuously changed in accordance with, for example, the opening amount of the door 14 (the rotation amount of the opening/closing motor 74 of the opening/closing power unit 70). Thereby, the wind speed at the opened portion can be kept substantially constant regardless of the opening degree of the door 14.

In embodiment 4, an opening/closing power unit 70 for opening/closing the door 14 is provided. Therefore, in embodiment 4, when the door 14 is opened when the fire alarm device 41 issues an alarm, the control unit 50 receives the alarm and issues a command to close the door 14 to the opening/closing power unit 70. This can suppress the discharge of flames and smoke from the portion where the door is open when a fire occurs.

[ embodiment 5]

Embodiment 5 is designed such that: the door 14 is fully automatically opened and closed, and the operation of the blower 20 is controlled in accordance with the opened and closed state of the door 14 and the state of the inside of the cooking chamber 12 detected by the state sensor 61.

Exhaust device for cooking utensil

The exhaust device for a cooking utensil in embodiment 5 is the same as embodiment 4 except that the state sensor 61 is provided as in embodiment 3 (see fig. 12, but the locking portion is not provided). The configuration of the state sensor 61 is the same as that of embodiment 3, and the other configurations, installation examples, and cooking methods are the same as those of embodiment 1, and therefore, descriptions thereof are omitted.

< control example >

(control example 7)

The control example of embodiment 5 (referred to as control example 7) is designed such that: the door 14 is opened in accordance with an opening instruction from the opening button 17a, and the door 14 is closed in accordance with a closing instruction from the closing button 17 b. During which the action of the blower is controlled.

Fig. 18 is a block diagram for explaining a control system of control example 7. The control system according to embodiment 5 is designed to receive an input from the state sensor 61 by the control system according to embodiment 4, and the other configurations are the same, and therefore, the description thereof is omitted.

Fig. 19 is a flowchart showing a control procedure. The CPU711 executes a program created based on the procedure to control the operation of the blower 20 together with the opening and closing operation of the door 14.

The air volume was the same as in control example 6. Since a part of the control procedure is also the same as in control example 6, the same step number (S number) is assigned and the description is simplified or omitted.

The control sequence will be explained.

The CPU711, when generating the on button input (yes in S11), issues an instruction to the converter 701 to output a voltage for generating the third air volume (S12).

Next, the CPU711 compares the detection value from the state sensor 61 with the reference value (S24). The reference value is stored in advance in the nonvolatile memory 714.

The reference value used here may be one predetermined as in embodiment 3, or may be a value corresponding to a change in the environment. For example, the value of the state sensor 61 before the start of cooking is stored as a reference value in advance, and after cooking, the value of the state sensor 61 is compared with the stored reference value (the value before the start of cooking) in S24. For example, since the temperature, pressure, and the like are different depending on the weather of the day, the state in the cooking chamber 12 can be reliably determined according to the environment.

Then, when the detection value is equal to or less than the reference value (yes in S24), the CPU711 instructs the converter 701 to output a voltage for generating the second air volume (S15).

Next, the CPU711 gives a command to the opening/closing power unit 70 to open the door 14 (S16), and waits for the input of the close button 17b (S17).

Then, when an input is generated from the close button 17b (yes in S17), the CPU711 gives a command to close the door 14 to the opening/closing power unit 70 (S18), and gives a command to stop the voltage output (or to output a voltage for generating the first air flow) to the converter 701 (S19). Thereafter, the process returns to S11.

In this way, according to control example 7, when the door 14 is to be opened, the inside of the cooking chamber 12 is exhausted by pressing the open button 17 a. Thereafter, when the state sensor 61 determines that the odor in the cooking chamber 12 has dissipated, the door 14 is opened, and thus no odor leaks. On the other hand, in the case where the close button is pressed, the door 14 is automatically closed and the blower 20 is stopped. Therefore, power consumption by the blower 20 is not generated in the state where the door 14 is closed.

In control example 7, the rotational speed of the dc motor may be steplessly changed, for example, according to the opening amount of the door 14. Thereby, the wind speed at the opened portion can be kept substantially constant regardless of the opening degree of the door 14. In addition, control using an ac motor may be performed.

[ embodiment 6]

Embodiment 6 is an embodiment in which a shield 25 is provided on the upstream side in the air blowing direction of the blower 20.

Exhaust device for cooking utensil

Fig. 20 is a sectional view of the exhaust device for a cooking utensil of embodiment 6.

The cooking utensil exhaust device 106 according to embodiment 6 is provided with an intake side shutter 80 that opens and closes an intake port (an opening portion of a grease filter) on the upstream side (i.e., the intake side) in the air blowing direction of the blower 20. The suction-side shutter 80 closes the exhaust side in the cooking chamber 12.

The other structure may be the structure according to any one of embodiments 1 to 5. The control of the blower 20 in association with the opening and closing of the door 14 is also any of the control examples described in embodiments 1 to 5. Therefore, the explanation of the device configuration, installation example, and control other than the suction-side shutter is omitted.

The suction side shutter 80 is electrically driven and opens and closes in conjunction with the operation of the blower 20. The opening and closing of the suction side shutter may be performed under the control of the control unit 50, or the wiring may be connected from the wiring for supplying electric power to the blower 20 to a drive source (not shown) of the suction side shutter 80, the suction side shutter 80 may be opened by passing current through the wiring for supplying electric power to the blower 20, and the suction side shutter 80 may be closed by not passing current through the wiring for supplying electric power to the blower 20.

The suction side shutter 80 is closed when the fire alarm device 41 gives an alarm in conjunction with the fire alarm device 41. When the suction-side shutter 80 is opened when the fire alarm 41 gives an alarm, the control unit 50 receives the alarm and gives a command to close the suction-side shutter 80. This prevents or suppresses the discharge of flames and smoke through the exhaust duct during a fire. In this case, it is preferable to provide an auxiliary battery or the like to cope with the case where the power of the entire device is cut off by a fire, and in this case, only the operation of turning off may be performed.

The cooking utensil exhaust apparatus 106 according to embodiment 6 can prevent oil smoke and the like from entering the blower housing while the blower 20 is stopped by providing the intake side shutter 80. Therefore, it is possible to suppress a situation in which odor may be caused, such as adhesion and accumulation of dirt to the blower 20.

[ embodiment 7]

Embodiment 7 is an embodiment in which an inner panel having an opening communicating with the suction port of the blower 20 is provided in the cooking chamber 12.

Exhaust device for cooking utensil

Fig. 21 is a sectional view of an exhaust device for a cooking utensil of embodiment 7.

The exhaust device 107 for a cooking utensil of embodiment 7 is provided with an inner panel 90 having an opening communicating with the suction port (the portion to which the grease filter 30 is attached) of the blower 20 in the cooking chamber 12. The other structure may be the structure according to any one of embodiments 1 to 6. The control of the blower 20 in accordance with the opening and closing of the door 14 is also any of the control examples described in embodiments 1 to 5. Therefore, the explanation of the configuration, arrangement example, and control of the devices other than the inner panel 90 will be omitted.

Inner panel 90 is provided to cover the ceiling portion in cooking chamber 12 and the lower portion of frame 35 of blower 20. In particular, it is preferable to cover the corner portions that are the joints between the top plate and the lower portion of the frame 35 and the side plate 13b and the back plate 13 c. The inner panel 90 is formed in a smooth curved shape without corners.

By providing the inner panel 90, it is possible to prevent or suppress the soot and the like generated in the cooking chamber 12 from adhering to the top plate portion and the lower portion of the housing 35 by the direct upward airflow. Since the inner panel 90 is formed in a smooth curved shape, cleaning is also easy. Since the attachment of dirt to the cooking chamber 12 also causes malodor, if cleaning is easy, the cause of malodor can be eliminated, and the spread of malodor can be suppressed more easily.

In order to prevent the interior of the cooking chamber 12 from being soiled, it is preferable to oil-repellent coat the inner wall of the cooking chamber 12 such as the side panel 13b and the back panel 13c, with the inner panel 90 as a main component. By oil-proof coating the inner wall of the cooking chamber 12, the adhesion of oil stains is reduced. In other embodiments where the inner panel 90 is not provided, the inner wall portions of the cooking chamber 12, such as the surfaces of the side panel 13b, the back panel 13c, and the top panel 13d on the cooking chamber side, are preferably oil-repellent coated.

[ embodiment 8]

Embodiment 7 is an embodiment in which an inner panel 90 having an opening communicating with the suction port of the blower 20 is provided in the cooking chamber 12.

Exhaust device for cooking utensil

Fig. 22 is a sectional view of an exhaust device for a cooking utensil of embodiment 8.

The cooking utensil exhaust device 108 according to embodiment 8 is provided with a deoiling device 801 in the cooking chamber 12. The other structure is the structure according to any one of embodiments 1 to 7. The control of the blower 20 in association with the opening and closing of the door 14 is also any of the control examples described in embodiments 1 to 5. Therefore, the explanation of the configuration, installation example, and control of the apparatus other than the oil removing apparatus 801 is omitted.

The oil removing device 801 is disposed under the top plate 13d in the cooking chamber 12. A deoiling duct 802 communicating with the blower 20 from the downstream side of the blower 20 and a vent 803 for switching the air blowing path are provided in the ceiling back portion.

The oil removing device 801 houses therein a rotating disc-shaped filter having a vent hole and a motor (both not shown) for driving the filter, and the lower portion of the oil removing device 801 is open to allow air to pass therethrough. The oil removing device 801 causes air containing oil to pass through a rotating disk to adhere the oil to the disk. The oil deposited collides with the inner wall portion of the oil removing device 801 by centrifugal force and is stored in an oil reservoir (not shown) provided along the inner wall portion. The oil reservoir is detachable, and the stored oil is discarded by detaching the oil reservoir.

The degreasing duct 802 is a path for guiding the exhaust gas of the blower 20 to the degreasing device 801. The vent 803 is an exhaust path switching unit that guides the exhaust of the blower 20 to the exhaust port 23 (in the direction of connection with the exhaust duct 501) when the door 14 is open, and guides the exhaust of the blower 20 to the direction of the oil removing device 801 when the door 14 is closed. The vent 803 may be operated in accordance with the opening and closing of the door 14 in the control example described in each embodiment.

In embodiment 8, as an example of control thereof, it is preferable to control the blower 20 to operate even in a state where the door 14 is closed. This makes it possible to remove oil components that cause odor from the air in the cooking chamber 12.

When the oil removing device 801 is provided, a dedicated blower may be installed in the oil removing device 801 without using the exhaust air of the blower 20, so that the air in the cooking chamber 12 may be circulated through the oil removing device 801 and the cooking chamber 12 at all times. In this case, a dedicated duct may be provided, or a deoiling device 801 with a dedicated blower may be provided in the cooking chamber 12 without providing the deoiling duct 802.

[ cooking method ]

Next, a cooking method using the exhaust device for a cooking utensil in each of the above embodiments will be described.

First, the user opens the door 14 (sometimes presses an open button depending on the embodiment). Thereby, the blower 20 operates as described in the embodiments. When the door 14 is opened, the cooking appliance 200 places ingredients in the cooking chamber 12. Further, cooking time setting, cooking start operation, and the like are also performed on the cooking device 200.

After that, the user closes the door 14 (sometimes presses a close button depending on the embodiment). Thereby, the blower 20 is stopped or brought to the first air flow rate as described in the embodiments.

When the set cooking time has elapsed, cooking device 200 performs ringing such as a bell or a buzzer for notifying completion of cooking, or displays a lamp or a display device.

The user who recognizes the above-described ringing and display opens the door 14. Thereby, the blower 20 operates as described in the embodiments. The user who has opened the door 14 takes out the cooked food and places the next batch of food as needed.

According to such a cooking method, since the blower 20 operates in accordance with the opening and closing of the door 14 as in the control example described above, it is possible to prevent or suppress odor from the cooking chamber 12 during or after cooking from being scattered in the room.

(embodiment in conjunction with cooking utensil)

As another cooking method, the blower 20 may be controlled in cooperation with the cooking appliance 200.

As described in the above cooking method, a cooking time is set for the cooking appliance 200 during cooking. For example, in the case of an electric fryer, the frying time is set. The cooking time may be used for coordinated control. Therefore, the cooking appliance 200 communicates with the control unit 50, and thus starts the blower 20 to start the exhaust as long as the blower 20 is stopped even when the door 14 is closed at the time point when the cooking time elapses. Communication between cooking utensil 200 and control unit 50 may be simply a switch for activating blower 20. When the control computer 702 controls the air blower 20, a signal for ending the timing is transmitted from the cooking utensil 200 to the control computer 702, and the control computer 702 activates the air blower 20.

As another control example in cooperation with cooking utensil 200, it is also possible to design: the control unit 50 receives the cooking time set for the cooking appliance 200, counts the time on the control unit 50 side, and starts the blower 20 to start exhausting as long as the blower 20 is stopped even if the door 14 is closed at the time point when the set time has elapsed. Further, in this case, blower 20 may be started earlier than the finish time set for cooking utensil 200.

In this way, by activating the blower 20 in cooperation with the cooking utensil 200, the blower 20 starts to exhaust air simultaneously with completion of cooking, and therefore even when the door 14 is opened immediately after completion of cooking, the air in the cooking chamber 12 can be somewhat exhausted during the period from completion of cooking to opening of the door 14, and therefore, leakage of odor can be further reduced. Further, if the blower 20 is started earlier than the cooking completion time, the air in the cooking chamber 12 can be discharged at the time point when the cooking is completed, and therefore the odor in the cooking chamber 12 is dissipated at the time point when the cooking is completed, and therefore the odor in the cooking chamber 12 does not leak out when the door 14 is opened.

The embodiments to which the present invention is applied have been described above, but the present invention is not limited to the above embodiments.

For example, a temporary stop portion for temporarily stopping the door 14 until the door 14 is fully opened when the door 14 is opened may be provided in the exhaust device for a cooking appliance. As an example of control in this case, control may be devised such that the temporary stop by the temporary stop unit is released after a predetermined temporary stop time has elapsed in a state in which the door 14 is temporarily stopped. This allows air to be easily introduced into the cooking chamber 12 by slightly opening the door 14. In this case, the release of the temporary stop may be performed not after a predetermined time but when the state sensor 61 determines that the odor has dissipated (or decreased). Here, the opening degree of the door 14 at the time of temporary stop is preferably 1 to 50% (the full opening is 100%), for example. If the opening degree during the temporary stop is less than 1%, the amount of air sucked is too small to reduce the load. On the other hand, if the opening is more than 50%, it is meaningless because it is not different from the fully open geometry.

The door 14 is not limited to a single-plate shape, and may be designed as a multi-plate door 14, or may be designed as a roll screen. Further, the slider may be a lateral slider or the like instead of the upper and lower sliders, and may have various shapes and forms such as a double-split slider instead of a single-split slider.

The exhaust device for a cooking utensil of the present invention is often installed in a room inside a house, but can be used as an energy-saving exhaust device for a cooking utensil that prevents odor from being emitted to the surroundings even when installed outdoors (for example, in an outdoor exhibition).

Further, the control examples described in the respective embodiments may not be individual control examples, but may be performed in combination with each other, and may be provided to perform control other than the above-described control.

Further, the present invention can be implemented in various embodiments based on the technical idea described in the claims, and these embodiments are also included in the scope of the present invention.

The present application is proposed based on japanese patent application No. 2017-216630 filed on 11/9/2017, the disclosure of which is incorporated by reference in its entirety.

Description of the reference numerals

11 a rack,

12 a cooking chamber,

13a front panel,

13b side panels,

13c a back plate,

13d a top plate,

14 doors,

15 handles,

16 liner,

17. 17a turn-on button,

17b a closing button,

18. 18a, 18b, 18c, 19a, 19b indicator light,

20 a blower,

21 motor, a motor,

22 multi-blade fan,

23 exhaust ports,

25 of a shielding piece,

30 a grease filter,

31 an air filter,

32 a deodorizing filter,

33 a smoke removing filter,

34 an oil absorption filter,

35 a frame body,

41 fire alarm device,

42 fire extinguisher,

50 a control part,

51 open/close sensor,

52 full-open sensor,

55 a locking part,

57 timer,

58 electromagnetic solenoid,

61 state sensor,

62 control IC,

70 an opening and closing power part,

72 rack bar,

73 a pinion gear,

74 an opening/closing motor,

80 a suction side shutter,

90 an inner panel,

101. 102, 103, 104, 106, 107, 108 exhaust device for cooking utensil,

200 parts of cooking utensil,

501. 503 exhaust passage,

701 converter,

702 a control computer,

711 CPU、

712 ROM、

713 RAM、

714 a nonvolatile memory,

801 oil removing device,

802 channels for removing oil,

803 to vent.

Claims (25)

1. An exhaust device for a cooking utensil, comprising:

A cooking chamber in which a cooking appliance is housed;

a door provided to the cooking chamber;

a blower connected to an exhaust passage for discharging air in the cooking chamber into or out of a room in which the cooking chamber is installed; and

a control unit that changes an operation of the blower in accordance with an open/close state of the door,

the control unit performs the following control:

when the door is in a closed state, controlling the blower to stop or to achieve a first air volume;

controlling the blower to have a third air flow rate larger than the first air flow rate during a period from the start of opening of the door to full opening of the door;

and controlling the blower to have a second air flow rate that is greater than the first air flow rate and less than the third air flow rate after the door is fully opened.

2. The exhaust apparatus for cooking utensil of claim 1 wherein,

the exhaust device for a cooking utensil comprises:

an open/close sensor that detects an open/close state of the door; and,

A full-open sensor that detects full-opening of the door,

the control unit regards a point of time when the signal from the open/close sensor changes from the closed state to the open state as the start of opening of the door, and receives a signal indicating that the door is fully opened from the fully open sensor to control the blower.

3. The exhaust apparatus for cooking appliance according to claim 1, wherein,

the exhaust device for the cooking utensil is provided with an opening and closing sensor for detecting the opening and closing state of the door,

the control unit controls the blower by regarding a time point when the signal from the open/close sensor changes from the closed state to the open state as the start of the door opening, and regarding the door as the full open state after a predetermined time has elapsed from the start of the door opening.

4. The exhaust apparatus for cooking utensil of any one of claims 1 to 3 wherein,

the exhaust device for a cooking utensil comprises:

an open button that makes an instruction to open the door; and

a locking part for locking and unlocking the door in a state that the door is closed,

the control unit unlocks the locking unit after operating the blower for a predetermined time when receiving an instruction to open the door from the open button.

5. The exhaust apparatus for cooking utensil of any one of claims 1 to 3 wherein,

the exhaust device for a cooking utensil comprises:

an open button that makes an instruction to open the door; and

an opening/closing power unit for opening/closing the door,

The control unit controls the opening/closing power unit to open the door after operating the blower for a predetermined time period when receiving an instruction to open the door from the opening button.

6. The exhaust apparatus for cooking utensil of any one of claims 1 to 3 wherein,

the exhaust device for a cooking utensil comprises:

an open button that makes an instruction to open the door;

a locking unit that locks and unlocks the door in a state where the door is closed; and

a cooking chamber state detection sensor that detects a state in the cooking chamber,

the control unit unlocks the locking unit when a detection value of at least one of odor, temperature, oil in air, smoke, and pressure in the cooking chamber detected by the cooking chamber state detection sensor is equal to or less than a predetermined reference value.

7. The exhaust apparatus for cooking appliance according to claim 1 or 2, wherein,

the exhaust device for a cooking utensil comprises:

an open button that makes an instruction to open the door;

an opening/closing power unit that opens and closes the door; and

a cooking chamber state detection sensor that detects a state in the cooking chamber,

The control unit controls the opening/closing power unit to open the door when a detection value of at least one of odor, temperature, oil in air, smoke, and pressure in the cooking chamber detected by the cooking chamber state detection sensor is equal to or less than a predetermined reference value.

8. The exhaust apparatus for cooking utensil of any one of claims 1 to 6 wherein,

the exhaust device for a cooking appliance has a temporary stop section for temporarily stopping the door from opening until the door is fully opened,

the control unit cancels the temporary stop by the temporary stop unit when a predetermined temporary stop time has elapsed after the door is stopped by the temporary stop unit.

9. The exhaust apparatus for cooking utensil of any one of claims 1 to 6 wherein,

the exhaust device for a cooking utensil comprises:

a temporary stop unit that temporarily stops the door during a period from when the door starts to be opened to when the door is fully opened; and

a cooking chamber state detection sensor that detects a state in the cooking chamber,

the control unit may be configured to cancel the temporary stop by the temporary stop unit when a detection value of at least one of odor, temperature, oil in air, smoke, and pressure in the cooking chamber detected by the cooking chamber state detection sensor is equal to or less than a predetermined reference value.

10. The exhaust apparatus for cooking utensil of any one of claims 1 to 9 wherein,

the cooking utensil accommodated in the cooking chamber can communicate with the control part,

the control unit operates the blower when the control unit receives a cooking completion signal from the cooking appliance and the blower is stopped.

11. The exhaust apparatus for cooking utensil of any one of claims 1 to 9 wherein,

the cooking utensil accommodated in the cooking chamber can communicate with the control part,

the control unit operates the blower when the control unit receives a signal indicating that a predetermined time has elapsed since the start of cooking from the cooking appliance and the blower is stopped.

12. The exhaust apparatus for cooking utensil of any one of claims 1 to 9 wherein,

the control unit operates the blower when the blower is stopped after a predetermined time has elapsed from the start of cooking.

13. The exhaust apparatus for cooking utensil of any one of claims 1 to 12 wherein,

the air blower has a deodorizing filter for deodorizing air on the upstream side or the downstream side.

14. The exhaust apparatus for cooking utensil of any one of claims 1 to 13 wherein,

the control unit controls the blower so that the air velocity flowing into the cooking chamber becomes 0.2m/s or more in a fully opened state of the door.

15. The exhaust apparatus for cooking utensil of any one of claims 1 to 14 wherein,

the exhaust device for a cooking appliance has a shutter that blocks an exhaust side in the cooking chamber when the blower is stopped.

16. The exhaust apparatus for cooking utensil of any one of claims 1 to 15 wherein,

the exhaust device for a cooking appliance has a fire alarm device that monitors the inside of the cooking chamber and issues an alarm when a fire occurs.

17. The exhaust apparatus for cooking appliance according to claim 5 or 7, wherein,

the exhaust device for cooking utensil has a fire alarm device, the fire alarm device monitors the cooking chamber and gives an alarm when a fire occurs,

the control unit closes the door when the door is opened when the fire alarm unit gives an alarm.

18. The exhaust apparatus for cooking utensil of any one of claims 1 to 14 wherein,

The exhaust device for a cooking utensil comprises:

a fire alarm device for monitoring the cooking chamber and giving an alarm when a fire occurs; and

a shutter that blocks an exhaust side in the cooking chamber,

the control part closes the shielding piece when the fire alarm gives an alarm.

19. The exhaust apparatus for cooking utensil of any one of claims 16 ~ 18 wherein,

the exhaust device for a cooking appliance has a fire extinguisher that ejects a fire extinguishing agent at least toward the cooking chamber when the fire alarm issues an alarm.

20. The exhaust apparatus for cooking utensil of any one of claims 1 to 19 wherein,

the cooking appliance is a fryer.

21. The exhaust apparatus for cooking utensil of any one of claims 1 ~ 20 wherein,

oil-proof coating is applied to the inner wall of the cooking chamber.

22. The exhaust apparatus for cooking utensil of any one of claims 1 ~ 21 wherein,

an inner panel having an opening communicating with a suction port of the blower is provided in the cooking chamber.

23. The exhaust apparatus for cooking utensil of any one of claims 1 ~ 22 wherein,

The exhaust device for a cooking utensil further comprises a deoiling device which removes oil from the air in the cooking chamber.

24. The exhaust apparatus for cooking appliance according to claim 23, wherein,

the exhaust device for a cooking utensil includes an exhaust path switching unit that guides the exhaust of the blower in the direction of the exhaust duct when the door is open and guides the exhaust of the blower in the direction of the oil removal device when the door is closed.

25. A cooking method using the exhaust device for a cooking utensil according to any one of claims 1 to 24, the cooking method comprising:

a step of opening the door to place the food in the cooking appliance in the cooking chamber;

a step of closing the door; and

a step of opening the door after cooking is completed.

Images