JPH02225914A - Exhausting device for cooking - Google Patents

Abstract

PURPOSE:To prevent the burning under the condition of the absence of a cooking pan, and to avoid the danger of a burn by controlling the supply of gas for burning to be shut off according to results detected by a temperature sensor for detecting a temperature at the bottom of the pan set on a cooking apparatus and by a pan sensor for detecting the presence of the pan on the cooking apparatus. CONSTITUTION:In the case where a cook has carelessly left a cooking apparatus 1 burning without setting a cooking pan on a pan holder 3, the head 4a of a temperature sensor is in the state of protruding upward from the pan holder 3 because of no pan set thereon, and a projection does not depress a push switch of a pan sensor 5, and hence the pan sensor 5 does not detect the pan. In this instance, a temperature sensor 4 is to detect an atmosphere temperature in the vicinity of the central part of a burner 10. However, the atmosphere temperature is stabilized at the comparatively low level of a predetermined temperature because of the presence of a non-burnt air stream flowing upward from the lower side of the cooking apparatus 1. As a result, when a temperature detected by the temperature sensor 4 exceeds the comparatively low level of the predetermined temperature though no pan is detected by the pan sensor 5, a controlling means 8 judges a burning state without a cooking pan being set on the pan holder 3 and operates a gas shutting-off means 7 to stop gas supply to the burner 10, thereby stopping the burning under the condition of the absence of the cooking pan.

Description

[Detailed description of the invention] Industrial applications The present invention deals with hypooxygen gas and oily gas generated from cooking appliances.

This relates to a cooking exhaust system that exhausts smoke, odors, etc. to the outdoors.

2. Prior Art Conventionally, this type of exhaust system for cooking has been developed under the Japanese Patent Publication No.
The configuration was as shown in Publication No. 17. However, with such a configuration, there was a problem that if a tempura fire occurred during cooking, there was a possibility of igniting surrounding buildings through the duct, so we have already developed the method shown in Figures 5 and 6. is suggesting. In the figure, a suction port 1o is provided at the rear upper part of a cooking table 2 equipped with a cooking device 16 such as a gas stove, air flow guide plates 13 are provided on the left and right sides of the upper surface of the cooking table 2, and a canopy 11 is provided above. Canopy 11
The airflow guide plate 13 and the back plate 12 are integrated to form a hood. Reference numeral 17 denotes a temperature sensor that detects the temperature at the bottom of the pot placed on the trivet 3 during cooking. When the temperature detected by the temperature sensor 17 exceeds a predetermined value, the control circuit 18 causes the gas cutoff device 7 to shut off the gas supply pipe. Gas supply from 9 to burner 1o is stopped, and heating of 1 m is stopped.

In the above configuration, oil, smoke, odor, etc. generated during cooking are sucked in from the front of the cooking table 2 by operating the blower 16, and flowed toward the suction port 1o along the canopy 11 and the airflow guide plate 13. The air is guided by the airflow, is sucked through the suction port 10, and is drawn into the ventilation passage 14. It passes through the blower 16 and is discharged outdoors.

If the cook inadvertently leaves the cooker 1e in a burning state while cooking tempura, the temperature of the tempura oil in the pot and the temperature of the bottom of the pot will gradually rise.

The temperature exceeds the temperature required for cooking and eventually the tempura oil ignites, but when the temperature detected by the temperature sensor 17 is just before ignition, the control circuit 18 uses a gas cutoff device to shut off the gas from the gas supply pipe 9 to the burner 1o. In order to stop the gas supply to
The temperature of the oil did not rise and there was no risk of fire.

Problems to be Solved by the Invention However, in such a conventional configuration, when the burner 10 is in a dry firing state with no pot placed on the trivet 3, the temperature sensor 17 is located at the center of the burner 10. The temperature is cooled from the surrounding area by the ventilation that flows through it, and even if dry firing continues, the temperature does not rise above a certain predetermined temperature. Therefore, the control circuit 18 does not operate the gas cutoff device, and dry firing continues until the cook notices. Next, there was the issue of being uneconomical.

Further, since the heat of combustion is not consumed for cooking, the temperature of the canopy 11 becomes higher than that during cooking, and if a cook touches it, there is a possibility of burns, which is dangerous.

The present invention solves these problems, and aims to provide an economical and safe cooking exhaust system that can prevent dry combustion and pose no risk of burns.

Means for Solving the Problem In order to solve this problem, the present invention provides a suction port at the rear upper part of the cooking table on which the cooking device is arranged, and
A temperature sensor that detects the temperature at the bottom of a pot placed on the cooker, a pot sensor that detects the presence or absence of a pot on the cooker by changing the position of the bottom temperature sensor, and detection of the pot sensor. Based on the results and the temperature detected by the temperature sensor,
The cooking exhaust device includes a control means for operating a gas cutoff device that cuts off the supply of combustion gas to the cooking appliance.

action With this configuration, if the cooker is dry-fired.

Since there is no pot on the cooker, the pot sensor does not detect the pot, but due to combustion, the temperature of the temperature sensor increases and exceeds a predetermined temperature. At this time, the control means determines that it is dry firing, operates the gas cutoff device, and stops the supply of gas to the cooker.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 to 4. In the figure, reference numeral 4 denotes a temperature sensor that detects the temperature of the bottom of a pot placed in the cooking device 1 during cooking, and a base 4b attached to the cooking device 1.

It consists of a head 4 & held by a spring spring so as to be able to move up and down relative to the base 4b so as to come into close contact with the bottom of the pot.
A protrusion is provided at a position where the switch of the play sensor 6 can be pressed. The pot sensor 6 is a button switch, and when the pot is placed on the trivet, the temperature sensor head F! 6
Pushed by 4a. Reference numeral 8 denotes a control means that operates a gas cutoff device 7 based on the temperature detected by the temperature sensor 4 and the detection result of the pan sensor 6, and disconnects the burner 1o from the gas supply pipe 9.
Stop the gas supply to. The rest of the configuration is the same as the conventional example.

In the above configuration, if the cook does not place the cooking pot on the trivet 3 and inadvertently leaves the cooker 1 in a burning state, as in the third cause, the head 4a of the temperature sensor will be activated because there is no pot. , is in a state of protruding above the trivet 3, the protrusion does not press the button switch of the pot sensor 6, and the pot sensor 6 does not detect the pot. At this time, the temperature sensor 4 detects the ambient temperature near the center of the bar-J-10. Due to the presence of the air flow, the temperature rises and stabilizes at a relatively low predetermined temperature, although it does not rise as high as in the case of a pot. Therefore, when the temperature detected by the temperature sensor 4 exceeds a relatively low predetermined temperature even though the pot sensor 5 does not detect a pot, the control means 8 determines that it is a dry combustion state and turns on the gas cutoff device 7. The gas supply to the burner 10 is stopped, and dry firing combustion is completed.

According to Figure 4, when the pot is placed on the trivet 3,
The head 4a of the temperature sensor is pushed downward by the pot, the protrusion pushes the push switch of the pot sensor 5, and the pot sensor 5 detects the pot. At this time, temperature sensor 4 detects the temperature at the bottom of the pot.

Similarly to the conventional example, when the temperature sensor 4 detects a relatively high temperature that is just before the tempura oil ignites, the control means 8 causes the gas cutoff device 7 to close the gas supply pipe 9.
The gas supply from the burner 10 to the burner 10 is stopped to prevent a fire from occurring.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, when the pot sensor does not detect a pot and the temperature detected by the temperature sensor exceeds a relatively low predetermined temperature, the control means controls the gas Since the shutoff device is activated and the gas supply to the burner is stopped, dry firing can be prevented, and the canopy does not get too hot and there is no risk of burns, resulting in a safe and economical cooking exhaust system. There is.

[Brief explanation of the drawing]

Fig. 1 is a side sectional view of a cooking exhaust system according to an embodiment of the present invention, Fig. 2 is a perspective view of the same cooking exhaust system, and Fig. 3 is a temperature sensor of the same cooking exhaust system when there is no pot. FIG. 4 is a detailed view of the temperature sensor and part of the pan sensor of the same cooking exhaust system when there is a pan, and FIG. 6 is a sectional view of the conventional cooking exhaust system. FIG. 6 is a perspective view of the cooking exhaust device. 1...Cooking device, 2...Cooking stand, 3.
...Gotoku. 4...Temperature sensor, 6...Pot sensor, 7...Gas cutoff device, 8...Control means. Name of agent: Patent attorney Shigetaka Awano and 1 other person 1=
-・aRibun 21. -Yori Drinking Chapter 2 Figure 5-・Yoroi Senna Figure Figure Figure Figure

Claims (1)

[Claims] A suction port is provided at the rear upper part of the cooking table on which the cooking device is placed, and a temperature sensor is installed to detect the temperature of the bottom of the pot placed on the cooking device, and by changing the position of this temperature sensor, A pot sensor that detects the presence or absence of a pot on the cooker, and a control means that operates a gas cutoff device that cuts off the supply of combustion gas to the cooker based on the detection result of the pot sensor and the temperature detected by the temperature sensor. Equipped with an exhaust system for cooking.