JP2800900B2 - Cooking device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to a heating and cooking apparatus that obtains a temperature of a food from an outer surface temperature of a container for cooking, compares the temperature with the preset temperature of the food, and controls the heat power of a heat source based on the temperature. .

[Prior art]

Conventionally, as a heating cooker, for example, in a gas stove shown in FIG. 5, there is a gas cooker in which a movable portion 3 having a built-in contact-type temperature sensor is disposed substantially at the center of a burner head 2 of a gas burner 1. The movable part 3 is a gotok 4 for placing a pot or the like.
Spring member (not shown) so as to project above the upper surface of the
The support portion 5 is elastically supported through the support. When the pot is placed on the pot 4, the tip of the movable part 3 comes into close contact with the outer bottom surface of the pot by a spring force, and the temperature of the outer bottom portion of the pot is detected by the contact-type temperature sensor. By controlling gas supply according to the detected temperature, thermal power adjustment is performed.

[Problems to be solved by the invention]

By the way, in such a gas stove, the gas burner 1
The heating power is adjusted according to the detected temperature of the outer bottom of the pan heated by the combustion of the slag, but the cooking temperature of the food heated through the pan becomes a problem. That is, the manner of adjusting the heating power differs depending on the food, but in the above-described heating power adjustment, the heating power is uniformly controlled according to the detected temperature of the pot bottom regardless of the cooking, so that the heating power adjusting means corresponds to the cooking. Depending on the food, there is a possibility that the food may be overheated and burn, or conversely, may be underheated. In order to prevent such inconvenience, the heating state may be adjusted by detecting the heating state (temperature) of the food. However, in order to directly detect the temperature of the food, a temperature sensor is provided inside the pot. In addition, there is a restriction that the heating control cannot be used unless the cooking container is provided with such a temperature sensor. Therefore, the present invention has been made in view of such a problem, and determines the temperature of the food in the container from the detected temperature on the side wall of the container, and makes it possible to adjust the heating power based on the calculated temperature. It is intended to provide a device.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a housing (11) in which an ignition switch (12) is arranged on a front panel (14),
A temperature control knob (13) provided on the panel of the housing to set the cooking temperature of the food; a combustion port (15) set on the upper surface side of the housing; and an upper surface portion of the combustion port Container (pot 24) for cooking food to be cooked
A gas burner (17) that is ignited by the ignition switch by the supply of fuel gas to generate a flame in the combustion port and heats the container, and a gas valve (gas proportional) for supplying and shutting off fuel gas to the gas burner A valve 21, an original solenoid valve 19), and an outer surface temperature on a side wall side of the container installed on the rear side upper surface portion of the housing away from the combustion port and installed on the upper surface side of the combustion port. A non-contact type temperature sensor (22) for storing a temperature difference between the outer surface temperature of the container heated by the gas burner and the temperature of the food in the container, and The cooking temperature is set by the temperature control knob,
The temperature of the food in the container is calculated by subtracting the temperature difference read in accordance with the outer surface temperature of the container detected by the non-contact type temperature sensor, and the calculated temperature is lower than the set temperature. In the case, the amount of fuel gas supplied to the gas burner is increased by increasing the opening of the gas valve, and when the calculated temperature is equal to or higher than the set temperature, the opening of the gas valve is decreased. Control means (control circuit unit) for reducing the supply amount of the fuel gas to the gas burner and shutting off the supply of the fuel gas to the gas burner when the calculated temperature continues to be equal to or higher than the set temperature for a predetermined time.
28).

[Action]

When the food put in the container is heated by the gas burner, when the outer surface temperature on the side wall of the container is detected, a temperature difference is generated between the detected temperature and the temperature of the food in the container.
Therefore, in the present invention, the temperature of the outer surface of the container, that is, the temperature difference between the detected temperature and the temperature of the food is obtained in advance, and the current temperature of the food is calculated from the detected temperature. The magnitude relationship between the calculated temperature and the cooking temperature (set temperature) set prior to cooking is monitored. If the calculated temperature is lower than the set temperature, the opening of the gas valve is increased to increase the fuel to the gas burner. If the gas supply amount is increased and the calculated temperature is equal to or higher than the set temperature, the opening degree of the gas valve is reduced to reduce the fuel gas supply amount to the gas burner. Then, when the calculated temperature continues to be equal to or higher than the set temperature for a predetermined time, the supply of the fuel gas to the gas burner is shut off to prevent the abnormal heating state from continuing. As a result, heating cooking can be performed at the set temperature of the food, and optimal heating can be performed. In addition, the non-contact type temperature sensor is installed on the upper surface on the back side of the housing away from the combustion port, and detects the outer surface temperature on the side wall side of the container, and due to boiling of the food from the container,
Temperature detection is not hindered.

【Example】

Hereinafter, the present invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 shows an embodiment of the cooking device of the present invention. In FIG. 1, a gas stove 10 is provided as a heating and cooking device, and the gas stove 10 is a gas burner as a heat source.
It has a housing 11 in which 17 is disposed. The housing 11 has an ignition switch 12 and a temperature control knob serving as a temperature setting means for the food.
There is provided a panel 14 in which 13 is disposed, a combustion port 15 for a gas burner 17, and a projecting portion 16 in which a non-contact type temperature sensor 22 is stored. Next, as shown in FIG. 2, a gas burner 17 is provided on the side of the combustion port 15 in the housing 11, and a pot 24 or the like is provided above the combustion port 15 as a container for heating and cooking. Are provided. Fuel gas is supplied to the gas burner 17 via a source solenoid valve 19, a safety valve 20, and a gas proportional valve 21 as gas valves. The protruding portion 16 has a built-in non-contact type temperature sensor 22, and the temperature on the side wall near the bottom 25 of the cooking pot 24 through the opening 23 formed in the protruding portion 16 is the non-contact type temperature sensor. It is detected by the sensor 22. This non-contact type temperature sensor
22 uses a thermopile as an example, but other temperature sensors may be used. Also, in the housing 11, various operation control commands are output in response to detection signals from the components constituting the ignition transformer 26, the flame rod detecting means, and the gas stove 10 as means for igniting. A control circuit unit 28 is provided as control means. FIG. 3 shows a configuration related to the control circuit unit 28. In the control circuit unit 28, in advance, various control modes, for example, the heating temperature is set according to the type of food and the degree of cooking, and a control command related to the gas supply control is set in order to obtain a corresponding heating power. Output to gas burner 17. In addition, a limit temperature can be set in order to prevent the food from burning. The operation of the gas stove 10 is as follows. Prior to cooking, temperature conditions of the food are set as various cooking conditions according to the food. The signal indicating the heating temperature of the food, that is, the set temperature, is taken into the control circuit unit 28 and stored. Next, the pan 24 is placed on the gas stove 18 of the gas stove 10, and by operating the ignition switch 12, the original solenoid valve 19, the safety valve 20, and the gas proportional valve 21 are opened, and the gas burner 17 is ignited. Then, the temperature of the side wall near the bottom 25 of the pan 24 is detected by the non-contact type temperature sensor 22, and this detection signal is introduced to the control circuit unit 28. As shown in FIG. 4, the control circuit unit 28 has an outer surface temperature on the side wall side from the bottom 25, that is,
A steady-state deviation (offset) representing a temperature difference between the detected temperature and the cooking temperature is stored, and the control circuit unit 28 subtracts the steady-state deviation from the detected temperature on the side wall near the bottom 25, thereby obtaining the pan 24. Then, the temperature of the food inside, that is, the current temperature is calculated. Next, the control circuit unit 28 compares the calculated current temperature of the cooked food with the set temperature of each cooked food, and when the temperature of the cooked food is lower than the set temperature, determines the gas supply amount. A control command for increasing is output to the gas proportional valve 21, and
If the temperature of the food exceeds the set temperature, a control command for reducing the supply amount of the fuel gas is output to the gas proportional valve 21. In this case, if a predetermined time has elapsed after the temperature of the food exceeds the set temperature, the control command is issued as an abnormal state to shut off the supply of the fuel gas by the gas proportional valve 21, the original solenoid valve 19, and the safety valve.
May be output to 20. In this way, the non-contact temperature sensor 22 detects the temperature of the side wall near the bottom 25 of the pan 24 for cooking by heating,
The temperature of the food is calculated from the detected temperature, and the thermal power is adjusted based on the magnitude relationship between the calculated temperature and the set temperature, so that heating cooking corresponding to the food can be performed. Then, since the temperature of the food is calculated from the temperature of the side wall surface of the pot 24 detected in a non-contact manner, it is not necessary to directly detect the temperature by inserting a thermometer into the pot 24 during cooking. But
The heating power can be adjusted according to the food. In addition, the non-contact type temperature sensor 22 that detects the temperature on the side wall near the bottom 25 of the pan 24 is provided at a position separated from the gas burner 17, so that during cooking, the non-contact type temperature The sensor 22 does not become dirty, and
Unlike a contact-type temperature sensor, it is not damaged by the bottom of the vessel such as the pot 24. As described above, the gas stove 10 has been described in the present embodiment, but the present invention can be applied to other cooking devices.

【The invention's effect】

As described above, according to the present invention, the following effects can be obtained. a.The calculated temperature of the food is calculated indirectly from the outer surface temperature of the container for cooking, and the heating power is adjusted according to the magnitude relationship between the calculated temperature and the set temperature. Thus, appropriate heating cooking can be performed. b.Since the non-contact temperature sensor detects the outer surface temperature of the side wall of the container at a position away from the combustion port, there is no need to directly detect the cooking temperature of the food, regardless of the type of container to be cooked. Heating control can be performed. c. A non-contact type temperature sensor is installed at a position distant from the combustion port to detect the outer surface temperature on the side wall of the container, so that the detection of temperature is not hindered by boiling over of the food, and the accuracy of temperature detection Highly reliable heating control can be realized without lowering.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the cooking device of the present invention, FIG. 2 is a side view of the cooking device shown in FIG. 1, and FIG. 3 is a block diagram showing a control system shown in FIG. Fig. 4 is a graph showing the relationship between the outer surface temperature of the container and the temperature of the food at that time, and Fig. 5 is a side view showing a conventional cooking device. 10 Gas stove (heating device) 11 Housing 12 Ignition switch 13 Temperature control knob 14 Panel 15 Combustion port 17 Gas burner 19 Original solenoid valve (gas valve) 21: gas proportional valve (gas valve) 22: non-contact type temperature sensor 24: pan (container) 25: bottom 28: control circuit (control means)

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaru Nagata 201 Nishi-Kashiwara Nitta, Fuji City, Shizuoka Prefecture Inside Takagi Sangyo Co., Ltd. (72) Inventor Masami Yamamoto 201 Nishi Kashiwabara Nitta, Fuji City, Shizuoka Prefecture Takagi Sangyo Co., Ltd. (56) References JP-A-58-178123 (JP, A) JP-A-63-213720 (JP, A) JP-A-61-38338 (JP, A) JP-A-62-31894 (JP, U) Japanese Utility Model Application Publication No. 63-10302 (JP, U) Nippon Denso Public Technical Report, issued on September 15, 1984, reference number 37-074 “Stove safety device” (58) Fields investigated (Int. Cl. ⁶ , DB Name) F24C 3/00-3/14 H05B 6/12

Claims (1)

(57) [Claims] A housing provided with an ignition switch on a front panel; a temperature control knob provided on the panel of the housing for setting a cooking temperature of food; and an upper surface of the housing. A set combustion port, a container placed on the upper surface of the combustion port, for storing a food to be heated and cooked, and a fuel gas supplied to ignite by the ignition switch to generate a flame in the combustion port, A gas burner for heating the container, a gas valve for supplying and shutting off fuel gas to and from the gas burner; and a top surface on the rear side of the housing, spaced apart from the combustion port, and a top surface side of the combustion port. A non-contact type temperature sensor for detecting an outer surface temperature on a side wall side of the container, and a temperature of the outer surface temperature and the food temperature of the container with respect to the outer surface temperature of the container heated by the gas burner. In addition to storing the temperature difference, the cooking temperature is set by the temperature adjustment knob prior to cooking, and the temperature difference read out according to the outer surface temperature of the container detected by the non-contact type temperature sensor is subtracted. By calculating the temperature of the food in the container, if the calculated temperature is less than the set temperature, increasing the degree of opening of the gas valve to increase the amount of fuel gas supplied to the gas burner, When the calculated temperature is equal to or higher than the set temperature, the amount of fuel gas supplied to the gas burner is reduced by reducing the opening of the gas valve, and the calculated temperature is maintained at or above the set temperature for a predetermined time. And a control means for shutting off the supply of the fuel gas to the gas burner.