JPH11294810A - Controller for ventilating fan - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a controller which operates a ventilating fan installed to the vicinity of a heating cooker at an appropriate air volume correspondingly to the operating state of the heating cooker. SOLUTION: A ventilating fan 2 installed to the vicinity of a gas range 1 can be switched to different air volumes. Temperature sensors 11 for preventing overheating, etc., are respectively provided to the gas cooking stoves of the gas range 1. The gas range 1 is also provided with a grill 12 and the temperature of the grill 12 is detected by means of a temperature sensor 13. The signals of the temperature sensors 11 and 13 indicating detected temperatures are inputted to the microcomputer 23 of the ventilating fan 2 through a signal cable 3. The microcomputer 23 switches the air volume of the ventilating fan 2 in such a way that the air volume is reduced when the temperatures detected by means of the sensors 11 and 13 are lower than a reference temperature and increased when the temperatures detected by means of the sensors 11 and 13 are higher than the reference temperature.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for a ventilation fan provided near a cooking device such as a stove, an oven or a grill.

[0002]

2. Description of the Related Art During cooking, smoke, steam or odor is generated, so that a ventilation fan is often provided near the cooking device. In particular, in a combustion-type heating cooking device, oxygen in the air is consumed, so that the necessity of ventilation is increased.

[0003] In a cooking device using gaseous fuel such as city gas, heating is performed during ignition, but a safety device has been provided which stops supply of gaseous fuel when the flame is extinguished due to boiling or the like. I have. Also, during cooking using oil, the temperature of the bottom of the oil storage pot is detected to prevent the oil from rising and spontaneously igniting. The function of automatically stopping is also being used.

[0004]

Although various measures have been taken to ensure the safety of the cooking device, consideration has not been given to maintaining the environment during cooking by providing adequate ventilation. For example, with a powerful ventilation fan,
If the ventilation fan is operated at all times, although ventilation is sufficient, noise and energy consumption when unnecessary are a problem. When the air volume of the ventilation fan is insufficient, sufficient ventilation cannot be performed. However, the cooking device may include a plurality of stoves and grills, such as a household gas table, and the number of operating stoves and grills may change as needed. As a ventilation fan corresponding to such a gas table or the like, it is preferable that the air volume can be switched in a plurality of stages or continuously. Even if the air volume of the ventilation fan can be switched, it is troublesome to always set an appropriate air volume.

[0005] It is an object of the present invention to provide a control device for a ventilation fan capable of controlling an appropriate air flow according to the operation state of the heating cooking device.

[0006]

SUMMARY OF THE INVENTION The present invention relates to a control device for a ventilation fan provided in the vicinity of a cooking device, which detects a driving condition of the cooking device and derives a signal indicating the driving condition. Detecting means, in response to a signal from the operating state detecting means, in the ventilation fan control device characterized by including an air volume control means for controlling the air volume of the ventilation fan to correspond to the operation state of the heating cooking device is there.

According to the present invention, the operating state of the cooking device is detected by the operating state detecting means. In response to a signal indicating the operation state from the operation state detection means, the air volume control means controls the air volume of the ventilation fan so as to correspond to the operation state of the cooking device. Since the air volume is controlled according to the operation state of the heating cooking device, appropriate ventilation can be performed according to the usage state of the heating cooking device.

Further, in the present invention, the cooking device has a plurality of heating units, each heating unit is provided with a temperature sensor, and the operating state control means responds to a detection output from the temperature sensor. And deriving a signal corresponding to the number and temperature of the heating units in operation.

According to the present invention, the cooking device has a plurality of heating units, and each heating unit is provided with a temperature sensor. The operating state detecting means derives a signal corresponding to the number and temperature of the operating heating units in response to the detection output from the temperature sensor. The number and temperature are provided to the air volume control means.
Since the air volume control means controls the ventilation fan so as to have an appropriate air volume according to the number and temperature of the heating units, the ventilation fan can be operated at an appropriate air volume corresponding to the heating state.

Further, in the present invention, the ventilation fan can switch the air volume between large, medium and small, and the air volume control means controls the temperature of the heating section of the heating cooking device detected by the temperature sensor of the operation state detection means. When the temperature is lower than a predetermined reference temperature, the air volume is small, when the temperature of the heating unit is near the reference temperature, the air volume is small or medium, and when the temperature of the heating unit is higher than the reference temperature, the air volume is large. , Is controlled so as to be switched respectively.

According to the present invention, a ventilation fan capable of switching the air volume between large, medium and small is provided so that the air volume is reduced when the temperature of the heating section of the cooking device is lower than a predetermined reference temperature, and the temperature of the heating section is reduced. When is near the reference temperature, decrease or increase the air volume.
When the temperature of the heating section is higher than the reference temperature, increase the air volume,
Since each is switched, it is possible to perform control to an appropriate air volume according to the heating temperature.

[0012]

FIG. 1 shows a schematic electrical configuration of an embodiment of the present invention. In the vicinity of the gas table 1, which is a heating cooking device, there is provided a ventilation fan 2 which can be operated by switching the air volume in three stages of large, medium and small. A signal cable 3 is provided between the gas table 1 and the ventilation fan 2. An interlock signal for interlocking the operation of the gas table 1 and the operation of the ventilation fan 2 is transmitted to the signal cable 3.

The gas table 1 has, for example, a plurality of stoves 10a and 10b (hereinafter collectively referred to as "1").
0 "). The stove 10 is provided with a temperature sensor 11 for preventing overheating or extinguishing. The gas table 1 is also provided with a grill 12 for heating an object such as a fish as a whole. The temperature inside the grill 12
The temperature is detected by the temperature sensor 13. Temperature sensor 11,
The detection output of 13 is led out to the signal cable 3 via the terminal 14 as an interlocking signal.

The ventilation fan 2 is provided with a fan 20 for ventilation, and is driven to rotate by a motor 21. The rotation speed of the motor 20 is switched by the air volume control switching device 22. The microcomputer 23 determines the operating state of the gas table 1 based on the outputs of the temperature sensors 11 and 13 of the gas table 1 given via the signal cable 3 according to a preset program, and determines an appropriate air volume. A signal is given to the air volume control switching device 22.

FIG. 2 shows an example of the gas table 1. The gas table 1 includes two stoves 10 a and 10 b and one grill 12. Each stove 1
In 0a and 10b, for example, when cooking in a pan, when the flame is extinguished due to spills or wind, the supply of gas is automatically stopped, a safety device for extinguishing to prevent gas leakage, and a temperature at the bottom of the pan. An overheat prevention device or the like is provided for detecting and automatically stopping the gas supply before reaching the spontaneous ignition temperature of the tempura oil or the like, and the temperature sensor 11 shown in FIG. 1 is used for these devices.

FIG. 3 shows a schematic configuration of the extinguishing safety device provided on the stove 10 of FIG. As shown in FIG. 3A, the electromagnet 33 of the solenoid valve unit 32 attracts the iron piece 34 by the thermoelectromotive force of the thermocouple 31, and the safety valve 3
5 can be kept open.
As shown in FIG. 3B, when the tip of the thermocouple 31 is not heated, the electromagnet 33 of the solenoid valve unit 32 cannot attract the iron piece 34, and the safety valve 35 is closed. When a person presses an ignition knob or a button, the associated push rod 36 presses the safety valve 35 of the electromagnetic valve unit 32, and gas is supplied as shown in FIG. 3A to ignite the stove. become. When the stove is ignited, a pilot flame 37 is generated and heats the tip of the thermocouple 31, so that a current flows due to the thermoelectromotive force in the coil of the electromagnet 33 and attracts the iron piece 34 attached to one end of the safety valve 35. I do. When the ignition knob or the button is released in this state, the push rod 36 returns to its original state by a spring or the like, but the safety valve 35 remains open, gas flows, and the stove 10 can be used. If the flame is extinguished due to wind or spillage while using the stove 10, the thermocouple 31
Is cooled and no thermoelectromotive force is generated.
Loses the adsorbing force, the safety valve 35 returns to its original state by the force of the spring, and closes the gas passage to stop the gas supply as shown in FIG. Since the thermoelectromotive force of the thermocouple 31 is determined according to its type, it can also be used as the temperature sensor 11.

FIG. 4 shows the switching operation of the air volume control of the ventilation fan 2 by the microcomputer 23 of the ventilation fan 2 for the gas table 1 provided with the extinguishing safety device shown in FIG. 3 on the stoves 10a and 10b of FIG. In step a1, the gas table 1
When any of the stoves 10a, 10b or the grill 12 is ignited, the control is started. In step a2,
The number of stoves 10a, 10b or grills 12 in use is determined based on the output from the thermocouple 31 of the extinguishing safety device for the stoves 10a, 10b and the output from the temperature sensor 13 of the grill 10. In step a3, the air flow is switched so as to have an air volume according to the number of operating vehicles. For example, when all three stoves 10a and 10b and the grill 12 are operated, the air volume is switched to a large value. When the switching of the air volume is completed, the procedure of the air volume switching according to the number of operating units is ended in step a4.

FIG. 5 shows a schematic configuration of a tempura oil overheating prevention device incorporated in the stoves 10a, 10b and the like in FIG.
A pot bottom temperature sensor 41 contacts a bottom of a pot 40 such as a frying pan for storing tempura oil with a spring. A pan bottom temperature signal indicating the temperature of the bottom of the pan 40 detected by the pan bottom temperature sensor 41 is given to the control circuit 42. Control circuit 4
2 controls the safety valve 43. Pan bottom temperature sensor 41
However, the bottom temperature is 350 ° C, which is the temperature at which the tempura oil ignites spontaneously.
, The control circuit 42 closes the safety valve 43 to cut off the gas supply. When the safety valve 43 is activated and not closed, the ignition of the gas burner 45 can be performed by operating the ignition / extinguishing button 44. Also,
The control circuit 42 is also provided with a flame signal from the thermocouple 31 for constituting the extinguishing safety device, and controls the safety valve 43 to realize the same function as in FIG.

FIG. 6 shows another embodiment of the present invention.
A control procedure for switching the air volume of the ventilation fan 2 in FIG. 1 using a pan bottom temperature sensor 41 for preventing overheating as shown in FIG. 5 as the temperature sensor 11 in FIG. 1 will be described. When the stoves 10a, 10b of the gas table 1 are started to be used in step b1, the thermoelectric power indicated by the pan bottom temperature signal output from the pan bottom temperature sensor 41 is converted into the pan bottom temperature in step b2. In step b3, the pot bottom temperature is compared with a reference temperature, for example, 100 ° C. 100 ° C. is a temperature at which water used in cooking often boils. Above this temperature, the degree of generation of steam and odor increases. When the pan bottom temperature is lower than around 100 ° C., only a small amount of exhaust is required, so the air volume is set to small in step b4. When the pot bottom temperature is about the same as 100 ° C., the air volume is set to small to medium on the assumption that the pot is in a boiling state and used for cooking. When the pot bottom temperature is higher than around 100 ° C., it is assumed that the dish is an oil dish, and the air volume is set to a large value in step b6. After setting the air volume in step b4, step b5 or step b6, step b7
Then, the air volume is switched to the set air volume, and the procedure ends in step b8.

FIG. 7 shows, as still another embodiment of the present invention, a procedure for switching the air volume of the ventilation fan 2 according to the output of the temperature sensor 13 of the grill 12 of FIG. Step c
In step 1, when the grill 12 of the gas table 1 is ignited, the temperature detected by the temperature sensor 13 is input in step c2.
In step c3, it is determined whether or not the input detected temperature is lower than a preset reference temperature. When the detected temperature is lower than the reference temperature, the air volume is set to medium in step c4. When it is determined in step c3 that the detected temperature is equal to or higher than the reference temperature, the air volume is set to a large value in step c5. After setting the air volume in step c4 or step c5, the air volume is switched to the air volume set in step c6,
The procedure ends at step c7.

In the grill 12, for example, cooking such as grilling of fish is performed, and smoke is easily emitted. Therefore, even if the detected temperature is lower than the reference temperature, the air volume of the ventilation fan 2 is set to medium rather than small. When the temperature is high, the air volume is set large.

In each of the above embodiments, the ventilation fan 2 can switch the air volume between three stages of large, medium, and small. However, even if it has two stages of large and small or more stages, continuous switching is possible. There may be. Multi-stage or continuous switching
Although it is cumbersome when operated by a person, it is preferable to automatically switch as in the present embodiment, since an appropriate air volume can be obtained as needed.

In the configuration shown in FIG. 1, signals are transmitted between the gas table 1 and the ventilation fan 2 via the signal cable 3, but may be transmitted via an optical fiber or the like. Also, not only signal transmission by wire,
It is also possible to transmit a signal via a wireless signal, for example, a radio wave or an infrared ray. Further, the temperature sensor 11
As an alternative, it is also possible to install a dedicated device instead of being used both as a safety device and a device for preventing overheating.

[0024]

As described above, according to the present invention, the ventilation fan provided in the vicinity of the cooking device can be appropriately adjusted in accordance with the operating state of the cooking device, that is, the state of cooking using the cooking device. Control can be performed.

Further, according to the present invention, when the cooking device includes a plurality of heating units, it is possible to control the ventilation fan so that an appropriate air flow is obtained according to the number and the temperature of the heating units in operation. .

Further, according to the present invention, the air volume of the ventilation fan can be switched between large, medium and small so that an appropriate air volume is obtained according to the heating temperature.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic electrical configuration of an embodiment of the present invention.

FIG. 2 is a diagram showing an example of a gas table 1.

FIG. 3 is a diagram showing a schematic configuration of an extinguishing safety device provided on stoves 10a and 10b in FIG. 2;

FIG. 4 is a perspective view of the safety device shown in FIG.
a and 10b, the microcomputer 2
FIG. 3 is a diagram showing a switching operation of the air volume control of the ventilation fan 2 by 3.

FIG. 5 is a diagram showing a schematic configuration of a tempura oil overheating prevention device incorporated in the stoves 10a, 10b and the like in FIG. 2;

6 is a diagram showing a control procedure for switching the air volume of the ventilation fan 2 of FIG. 1 using a heating-prevention pot bottom temperature sensor 41 as shown in FIG. 5 as still another embodiment of the present invention. .

FIG. 7 shows still another embodiment of the present invention, in which the ventilation fan 2 is operated in accordance with the output of the temperature sensor 13 of the grill 12 shown in FIG.
It is a figure which shows the procedure which switches the air volume of this.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1, Gas table 2 Ventilation fan 3 Signal cable 10, 10a, 10b Stove 11, 13 Temperature sensor 12 Grill 14 Terminal 20 Fan 21 Motor 22 Air flow control switching device 23 Microcomputer 31 Thermocouple 32 Electromagnetic valve unit 35 Safety valve 41 Pot bottom temperature sensor 42 Control circuit 43 Safety valve

Claims (3)

[Claims] 1. A control device for a ventilation fan provided in the vicinity of a cooking device, comprising: an operating state detecting means for detecting an operating state of the heating cooking apparatus and deriving a signal indicating the operating state; Air flow control means for controlling the air flow of the ventilation fan in response to a signal from the air conditioner so as to correspond to the operating state of the cooking device. 2. The heating cooking device has a plurality of heating units, each heating unit is provided with a temperature sensor, and the operating state control means operates in response to a detection output from the temperature sensor. The control device for a ventilation fan according to claim 1, wherein a signal corresponding to the number and temperature of the heating units in the inside is derived. 3. The ventilation fan is capable of switching the air volume between large, medium, and small, and the air volume control means determines a temperature of a heating section of the heating cooking device detected by a temperature sensor of the operation state detection means in advance. When the temperature is lower than the reference temperature, the air volume is small, when the temperature of the heating unit is near the reference temperature, the air volume is small or medium, and when the temperature of the heating unit is higher than the reference temperature, the air volume is large. 3. The control device for a ventilation fan according to claim 2, wherein control is performed so as to switch.