JPH0493529A - Device for discharging smoke of heat cooking apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is used in cooking devices such as system kitchens, and particularly relates to a smoke exhaust device for cooking devices such as cooking devices equipped with a function to prevent fires caused by oily smoke when cooking tempura or the like. .

BACKGROUND OF THE INVENTION In recent years, as kitchens have become more sophisticated, system kitchens have become widespread, and kitchens equipped with smoke evacuation devices have become mainstream.

Conventionally, smoke evacuation devices such as this type of heating cooker have generally had a configuration as shown in FIG. The configuration will be explained below with reference to the drawings.

As shown in the figure, a smoke exhaust device such as a heating cooker includes a main body 2 of the heating cooker having a heating section 1 such as a gas burner, and a smoke exhaust hood 3 for exhausting oil smoke generated when cooking tempura or the like. It consists of a smoke exhaust duct 4, and the main body of the cooking device includes a fuel supply pipe 5 that supplies gas to the heating section 1, a circuit breaker 6 installed in the middle of this fuel supply pipe 5, and a circuit breaker 6 installed in the center of the heating section 1. A temperature sensor 7 using a thermocouple is installed.

This temperature sensor 7 is attached so as to be in contact with the bottom surface of the cooking pot 8, and constantly monitors the temperature of the bottom surface of the cooking pot 8. When the temperature exceeds a certain temperature, the signal from the temperature sensor 7 is input to the controller 9 to shut it off 86. is activated to stop the gas supply.

Further, the smoke exhaust hood 3 has an inlet 10 opened near the heating section 1 and is attached to the wall surface 11 of the house, and the exhaust section 12 at the other end is connected to the smoke exhaust duct 4 provided penetrating through the wall surface 11. are doing. An exhaust fan 13 is provided in the smoke exhaust duct 4 to exhaust oil smoke from an exhaust port 14.

Problems to be Solved by the Invention In such conventional smoke evacuation devices such as heating cookers, the sensor that detects when oil smoke is abnormally generated is provided in the heating section 1, so a wire mesh is placed on the heating section 1. For example, when grilling fish directly on the grill or grilling meat on an iron plate,
If the upper surface of the heating part 1 is extensively blocked, the ambient temperature of the temperature sensor 7 becomes an extremely high temperature atmosphere, which significantly reduces its lifespan. In addition, for accurate detection,
Although it is necessary for the temperature sensor 7 to always be in accurate contact with the bottom of the cooking pot 8, there is a problem that the temperature sensor 7 may be damaged by impact during cooking.

The present invention solves the above problem. When tempura oil is abnormally overheated during cooking, this abnormality is detected in the smoke exhaust duct, and the fuel supply to the cooking device is cut off to prevent ignition. The purpose of this invention is to provide a smoke evacuation device such as a heating cooker that can prevent

Means for Solving the Problems In order to achieve the above object, the present invention provides a first means for solving the problems: a shutoff valve provided in a piping route for supplying fuel to a cooker; and a control means for opening and closing the shutoff valve. and a smoke exhaust hood for exhausting oil smoke generated by cooking, a photoelectric sensor is provided in the smoke exhaust hood, and the photoelectric sensor detects the amount of light shielding and inputs a signal to a control means to shut off the shutoff valve. The second problem-solving means is to provide an ultrasonic sensor in the smoke exhaust hood, detect the amount of attenuation by this ultrasonic sensor, and input a signal to the control means to shut off the cutoff valve. Furthermore, the third spy J%E
The main means is a pyroelectric sensor installed in the smoke exhaust hood, which detects the amount of reflection and inputs a signal to the control means to shut off the shutoff valve.

Function The first problem-solving means described above works by detecting a change in the amount of light transmitted by the optical sensor, which changes depending on the concentration of oily smoke sucked into the smoke exhaust duct, and inputting a signal to the control means to send the signal to the cooking device. It is possible to cut off the fuel supply of
In addition, the second problem-solving means operates by changing the intensity of the ultrasonic waves depending on the concentration of oil smoke sucked into the smoke exhaust duct.
In other words, it is possible to detect changes in the intensity of ultrasonic waves due to scattering or absorption, to detect abnormalities that could lead to a fire in advance, and to issue an alarm or cut off the fuel supply to the cooker. The action of the problem solving means is
A device that can detect changes in the amount of heat rays reflected depending on the concentration of oily smoke generated by cooking, detect abnormalities that could lead to a tempura fire in advance, and issue an alarm or cut off the supply of fuel to the cooker. It is.

EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. 1, 2, 3, and 40 show embodiments of the means for solving the first problem of the present invention. In this embodiment, the same components as those shown in the above-mentioned conventional example are given the same reference numerals, and the explanation thereof will be omitted. The characteristic structure of this embodiment is that the temperature sensor described in the conventional example is provided in a smoke exhaust hood using a different type of temperature sensor. That is, a pass-through photoelectric sensor 15 is provided inside the smoke exhaust hood 3, and a signal from the photoelectric sensor 15 is inputted to a control means 16 to operate the circuit breaker 6 and the alarm 17. The light sensor 15 consists of a light emitter 18 and a light receiver 19. The light emitter 18 and the light receiver 19 are arranged on both sides of the smoke exhaust foot 3, and an exhaust fan 13 is installed between them.
This allows the oil smoke sucked in to pass through.

To explain the operation in the above configuration, when a large amount of oil smoke is generated by cooking tempura and is sucked into the smoke exhaust hood 3, the light from the light emitter 18 of the photoelectric sensor 15 is blocked and the light flowing into the light receiver 19 is greatly reduced. Decrease.

The photoelectric sensor 15 detects this significant decrease in the amount of received light as a situation immediately before a tempura fire occurs, and if this output exceeds a certain limit, the control means 16 operates the circuit breaker 6 to supply fuel. This is to cut off the power and operate the alarm 17.

In the above explanation, an example was given in which the i3-type photoelectric sensor 15 was used, but as shown in FIG. A similar effect occurs when a reflective photoelectric sensor is used, and because the emitted light passes through the oil smoke twice, it can be detected as a larger signal change.

FIG. 5 shows an embodiment related to the second problem-solving means of the present invention. The difference from the first problem solving means is that a reflective ultrasonic sensor 21 is used instead of the photoelectric sensor 15 and is installed inside the smoke hood. 21 oscillator 2
The oil smoke sucked by the exhaust fan 13 passes between the receiver H 2 and the receiver 23, and the oil particles in the oil smoke scatter or absorb the ultrasonic waves, and the intensity of the ultrasonic waves received by the receiver H23 is significantly reduced. The ultrasonic sensor 21 detects this significant decrease in ultrasonic intensity as a situation immediately before a tempura fire occurs, and if this output exceeds a certain limit, the control B means I6 operates the circuit breaker 16 to prevent the fuel from burning. This is to cut off the supply of water and activate the alarm 17.

The above explanation has been made using an example in which a transmission-type ultrasonic sensor 21 is used, but as shown in FIG. Even when using a reflection-type ultrasonic sensor that places There is.

FIG. 7 shows an embodiment of the third problem-solving means of the present invention. The difference from the first problem solving means is that instead of the photoelectric sensor 15, an electric charge sensor 26 is installed inside the smoke exhaust hood to face the oil smoke. The oil smoke becomes a reflective object, and the heat rays from the pyroelectric sensor 26 are reflected and flow back to the pyroelectric sensor 26. In other words, the amount of reflection increases as the amount of oil smoke increases. The pyroelectric sensor 26 detects this significant increase in the amount of reflected heat rays as the situation immediately before a tempura fire occurs.
is detected, and if this output exceeds a certain limit, the control means 16 operates the circuit breaker 6 and the alarm 17.

Effects of the Invention As is clear from the above description of the embodiments, according to the present invention, a cutoff valve provided in a piping route for supplying fuel to a cooker;
Control means 5 for opening and closing the shutoff valve, and a smoke exhaust hood for exhausting oily smoke generated by cooking, a sensor provided in the smoke exhaust hood, and a control means for detecting an abnormality in the exhaust smoke by the sensor and transmitting a signal. By inputting this information to shut off the shutoff valve, it is possible to prevent tempura fires in advance and improve safety without being affected by the cooker used.

[Brief explanation of drawings]

FIG. 1 is a side sectional view showing the structure of a smoke evacuation device such as a heating cooker according to an embodiment of the first problem-solving means of the present invention, and FIG. 2 is a structure of the smoke evacuation device such as the heating cooker. FIG. 3 is a block explanatory diagram of a smoke evacuation device such as the heating cooker, FIG. 4 is a plan view showing the configuration of the smoke evacuation device such as the heating cooker, and FIG. A block diagram of a smoke evacuation device such as a heating cooker according to an embodiment of the second problem solving means, FIG. 6 is a plan view showing the configuration of the smoke evacuation device such as the heating cooker, and FIG. 7 is a block diagram of the present invention. FIG. 8 is a block diagram of a smoke evacuation device such as a cooking device according to an embodiment of the third problem solving means, and FIG. 8 is a side sectional view showing the configuration of a conventional smoke evacuation device such as a cooking device. 3...Fume exhaust hood, 6...Shutoff valve, 1
5...Photoelectric sensor, 16...Control means. 3- YaN ma1 foot 6- am 15--・light t zenbu 16・-% 11#yozui z2 23 generations! ! person's name 1

Claims (3)

[Claims] (1) A shutoff valve provided in a piping route that supplies fuel to the cooker, a control means for opening and closing the shutoff valve, and a smoke exhaust hood for exhausting oily smoke generated by cooking; A smoke evacuation device such as a heating cooker, which is provided with a photoelectric sensor, detects the amount of cutoff by the photoelectric sensor, and inputs a signal to a control means to cut off the cutoff valve. (2) A heating cooker, etc., in which an ultrasonic sensor is provided in place of the photoelectric sensor according to claim 1, and the ultrasonic sensor detects the amount of attenuation and inputs a signal to the control means to shut off the cutoff valve. smoke evacuation equipment. (3) A heating cooker, etc., in which a pyroelectric sensor is provided in place of the photoelectric sensor according to claim 1, and the pyroelectric sensor detects the amount of reflection and inputs a signal to the control means to shut off the shutoff valve. smoke evacuation equipment.