JPH08219462A - Gas controller for stove - Google Patents

Abstract

PURPOSE: To achieve the heat control and safety control of a burner for a stove with a battery power source by providing a temperature control circuit which is adapted to close a safety solenoid valve as the temperature of an object to be cooked rises above a high cut temperature set higher than a cooking temperature to restrict a power consumption. CONSTITUTION: The temperature of an object to be cooked is detected by a temperature sensor 15 while being compared with a cooking temperature by a temperature control circuit 55. Then, when the temperature of the object to be cooked is higher than the cooking temperature, a solenoid shut-off valve is closed and a gas is supplied to a burner for a stove passing through a bypass path of perform a weak combustion. When the temperature of the object to be cooked is lower than the cooking temperature, the shuth-off valve is opened to perform a strong combustion in the burner for the stove while a safety solenoid valve 18 is closed to turn OFF the burner for the stove even under the weak combustion when the temperature of the object to be cooked further rises to reach a high cut temperature. This enables the controlling of the temperature using a battery power source to improve workability in the setting of an apparatus.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove gas control device for controlling gas supply to a stove burner such as a gas table.

[0002]

2. Description of the Related Art In a gas table stove using a burner for a stove, as shown in, for example, Japanese Patent Laid-Open No. 4-187913, the temperature of an object to be cooked, such as a pot, is detected at a substantially central portion of the burner for the stove. The temperature sensor is provided so as to extinguish the burner when the temperature of the food to be cooked reaches, for example, the ignition temperature of tempura cooking.

[0003]

On the other hand, the blinking operation of the burner is performed by using the ignition and fire extinguishing button 6 which does not use an AC power source and which is mechanically operated in the same manner as an instrument of a dry battery specification. In terms of power consumption, safety valves and solenoid valves use an AC power source to supply power, so it is necessary to wire an AC power cord around the instrument body, especially in the case of a gas table, etc. However, there is a problem in that the slack of the power cord causes a burnout due to contact with a high temperature part of the appliance, and the installation is restricted due to lack of outlets.

Therefore, the present invention suppresses power consumption as much as possible,
The purpose of the invention is to make it possible to adjust the thermal power and control the safety of the burner for the stove by using the battery power source.

[0005]

The present invention provides an electromagnetic safety valve and a control valve for adjusting a gas supply amount by a manual operation in a gas passage to a burner for a stove. A self-holding electromagnetic on-off valve is installed, a bypass passage for passing a predetermined amount of gas is connected in parallel to this on-off valve, and the temperature at which the temperature of the cooked food heated by the stove burner is detected While controlling the opening and closing of the electromagnetic on-off valve by comparing the sensor and the cooking temperature detected by this temperature sensor with the preset cooking temperature,
A temperature control circuit is provided which closes the electromagnetic safety valve when the temperature of the object to be cooked rises above the set high cut temperature higher than the cooking temperature.

The present invention also provides a cooking determination circuit for determining the type of the object to be cooked, and changes the cooking temperature and the high cut temperature of the temperature control circuit according to the type of cooking determined by the cooking determination circuit. It consists of

[0007]

[Operation] The temperature sensor detects the temperature of the food,
In addition, the temperature control circuit compares the temperature of the food to be cooked with the cooking temperature. If the temperature of the food to be cooked is higher than the cooking temperature, the electromagnetic on-off valve is closed and gas is supplied to the stove burner through the bypass passage to weakly burn However, if the temperature is lower than the cooking temperature, the electromagnetic on-off valve is opened to burn the stove burner strongly, and due to the small amount of food being cooked, etc. Then, when the high cut temperature is reached, the electromagnetic safety valve is closed and the burner for the stove is extinguished, so that the temperature can be controlled using the battery power source, and the workability at the time of installing the equipment can be improved.

Further, the cooking decision circuit decides the type of the object to be cooked, and the cooking temperature and the high cut temperature are set according to the type of the object to be cooked, so that more comfortable cooking can be performed while using the battery power source. It can be done.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described first with reference to FIG. 1. (1) is a cooktop body of a gas table cooker, which is a top plate.
The stove parts (3) and (4) are attached to the left and right of (2),
A burner (6) for a stove, which has a built-in grill (5) between these stove sections and is attached to the stove section (3) in the embodiment.
Is a high-calorie burner having a maximum gas amount of, for example, about 4,000 kcal, and the burner (7) for the stove attached to the stove part (4) is a standard burner of, for example, about 2,000 kcal.

Reference numeral (8) is an operation panel mounted on the front surface of the stove body (1), which is located in front of the stove portions (3) and (4) and slid to the left and right to operate the burner for the stove.
(6) (7) and the operation knobs (9), (10) and (11) for adjusting the heating power of the grill burner (not shown) in the grill (5) are mounted and located below these operation knobs. The ignition knobs (12), (13) and (14) for performing the blinking operation of the stove burners (6) and (7) and the grill burner by the push and push operation are arranged.

Further, for example, a temperature sensor (15) for detecting the temperature of the food to be cooked, which uses a thermistor or the like, is arranged at the substantially central portion of the burner (6) for the stove, and the operation panel (8) Above, for example, the ignition knob (12), a mode setting switch (16) for setting and inputting a cooking mode such as grilled food cooking, stir-fried food cooking, and fried food cooking is arranged.

FIG. 2 shows a valve device for blinking the stove burner (6), and the like. An electromagnetic safety valve (18) and a main valve (19) are provided in a valve body (17) formed by aluminum die casting. And a main valve shaft (20) integrally mounted with the main valve shaft are slidably mounted in the axial direction, and one end of the main valve shaft is attached to the valve shaft (2
1) Face the tip and project the other end to the front of the valve body (17), and integrate the ignition valve (22) between the main valve (19) and the other end of the main valve shaft (20). The main gas outlet hole (24) through which the gas that has passed through the valve body (23) of the electromagnetic safety valve (18) and the main valve (19) flows out, and the main valve (19) and the ignition valve. An ignition gas outflow hole (25) through which the gas passing through the portion (22) flows out is opened.

Reference numeral (26) is an adjusting unit connected to the opening surfaces of the main gas outflow hole (24) and the ignition gas outflow hole (25) of the valve body (17) and communicates with the main gas outflow hole (24). Arrange a control valve (28) for thermal power adjustment in the downstream part of the main gas flow path (27)
Moreover, a gas outlet (29) for mounting a gas nozzle for gas ejection (not shown) is provided downstream of this control valve, and a self-holding type (open valve) is provided upstream of the control valve (28) in the main gas flow path (27). Further, an electromagnetic opening / closing valve (30) is provided which needs to be energized only when the valve is closed and retains that state even after the valve is opened and closed without being energized.

The solenoid on-off valve (30) is the main gas flow path.
A sub-valve (32) for opening and closing the sub-valve seat (31) formed in the middle of (27) is provided, and the adjusting unit (26) includes a bypass passage (bypassing the sub-valve seat (31). 33), and this bypass passage is an orifice passage that regulates the flow rate of gas passing through the passage to a preset predetermined flow rate (for example, around 2,400 kcal, which is about half of the above-mentioned maximum gas amount), and also at one end. To communicate with the ignition gas outflow hole (25) of the valve body (17) and the other end thereof to the gas outlet (29) to form an ignition gas flow path (34).

Reference numeral (35) is an operation lever mounted on the front surface of the valve body (17) on the same axis as the main valve shaft (20) so as to be slidable in the axial direction. For example, a heart-shaped guide groove (36) is formed, and the tip of the pin (37) is inserted into this guide groove, and this pin and the guide groove (3
In combination with 6), push-push operation is performed by pushing the operation lever (35) in the axial direction.

Reference numeral (38) is a control lever for rotating the control valve (28) to control the amount of gas from the main gas passage (27) through the control valve (28) to the gas outlet (29). The above operation knob on the tip
(9) is fixed.

FIG. 3 shows a combustion control circuit (39) for controlling combustion of the burner (6) (7) for the stove and the burner for the grill. For example, an arithmetic circuit (40) constituted by a microcomputer is shown. A flame detection circuit (42) for detecting the electromotive force of a thermocouple (41) which is heated by the combustion flames of the burners (6) (7) and generates an electromotive force, and outputs a flame presence / absence signal to an input, A switch detection circuit (45) for detecting an open / closed state of an ignition switch (43) and a cock switch (44) for detecting an ignition operation and a fire extinguishing operation by the ignition knobs (12) (13) (14), and the mode setting switch A mode setting circuit (46) that detects the cooking mode set by detecting the input operation of (16), and a temperature detection circuit (47) that detects the temperature of the cooking object from the output of the temperature sensor (15).
And a safety valve drive circuit (50) for connecting the power supply circuit (49) for supplying a power source constituted by the dry battery (48) and detecting the power supply voltage etc., and operating the electromagnetic safety valve (18) at the output.
Similarly, an on-off valve drive circuit (51) that similarly operates the solenoid on-off valve (30), an igniter drive circuit (53) that operates an igniter (52) that ignites by generating discharge in the combustion section of each burner, etc. Are connected.

Further, the arithmetic circuit (40) includes a cooking determination circuit (54) for determining the type of the cooking object based on the outputs of the mode setting circuit (46) and the temperature detection circuit (47), and the temperature The electromagnetic on-off valve is compared with the cooking temperature set by judging the temperature of the object to be cooked detected by the detection circuit (47) by the cooking judgment circuit (54) and the high cut temperature set higher than this cooking temperature. (30) is controlled to open or close, or the solenoid safety valve (1
The temperature control circuit (55) for closing 8) is provided.

When the cooking determination circuit (54) is configured to input, for example, fried food such as tempura, fried food cooking, simmered food cooking, etc. by the mode setting switch (16), this input is applied to this input. Based on the setting of cooking based on the setting of an input switch, for example in the case of boiling water, the temperature detection circuit (47) detects the temperature of the cooking target and automatically determines the type of cooking target from the temperature drop gradient. It is a judgment.

Further, the temperature control circuit (55) sets the cooking temperature to, for example, 180 ° C. when the cooking determination circuit (54) determines that it is fried food cooking, and detects the temperature by the temperature sensor (15). The temperature of the cooked food is, for example, 190 ° C, which is the maximum temperature.
When the above is reached, the solenoid on-off valve (30) is closed and the burner (6) for the stove is made to be weakly burned, and when the temperature of the food to be cooked falls below the lower limit temperature of 170 ° C., for example, the solenoid on-off valve
(30) is opened and the burner (6) for the stove is made to burn strongly.

Similarly, when the cooking determination circuit (54) determines that the cooking is cooking, for example, the cooking temperature is set to 11
Set the temperature to 0 ° C, and the temperature of the food to be cooked is, for example, 12
When the temperature reaches 0 ° C or higher, the electromagnetic on-off valve (30) is closed and the burner for the stove (6) is weakly burned, and when the temperature of the food to be cooked is lowered to the lower limit temperature of 90 ° C or less, for example, the electromagnetic on-off valve is opened. (30) is opened and the burner for the stove (6) is made to burn strongly.

Further, the temperature control circuit (55) allows the cooked object to be cooked due to the small amount of the cooked object even if the cooker burner (6) is weakly burned when the temperature of the cooked object reaches the upper limit temperature. The temperature is further increased to a preset high-cut temperature (for example, 250 ° C. for fried cooking, 140 ° C. for boiled cooking).
When the temperature rises above ℃), the electromagnetic safety valve (18) is closed to stop the combustion of the burner (6) for the stove.

The operation of the burner (6) for the stove will now be described. When the ignition operation is performed by pushing the ignition knob (12), the arithmetic circuit (40) operates by the output of the switch detection circuit (45). Is detected, the igniter drive circuit (53) activates the igniter (52), and the safety valve drive circuit (50) and the on-off valve drive circuit (51) respectively operate the electromagnetic safety valve (18) and the electromagnetic on-off valve (3).
(0) is supplied with electric power for holding the valve open, and the main gas outflow hole (24) and ignition gas outflow hole (25) of the valve body (17) and the main gas flow path (27) of the adjustment unit (26) are provided. Gas is supplied to the stove burner (6) from the gas outlet (29) through the bypass passage (33) and the ignition gas flow path (34) to ignite the burner.

During the ignition operation of the ignition knob (12), the operation lever (35) slides in the axial direction by pushing the ignition knob, and the main shaft valve (20) slides by the operation lever and the electromagnetic safety valve When the valve body (23) of (18) is set to open, the main valve
(19) is opened, gas is supplied from the main gas outflow hole (24), and the ignition valve portion (22) is also opened to supply gas from the ignition gas outflow hole (25).

On the other hand, when the switch detection circuit (45) detects the ignition operation of the ignition knob (12), the arithmetic circuit (40) energizes the electromagnetic safety valve (18) to set the valve open and at the same time the electromagnetic opening / closing valve (30). ) To open these, and open the main gas outlet hole (2
The gas supplied from (4) is supplied to the gas outlet (29) through the main gas flow path (27) and the bypass passage (34) and the post-regulation valve (28), and at the same time, the ignition gas outflow hole (25 The gas supplied from (1) is supplied to the gas outlet (29) through the ignition gas flow path (34).

On the other hand, when the burner (6) for the stove is ignited, the arithmetic circuit (40) detects this by the output of the flame detection circuit (42) and continues the supply of the holding power to the electromagnetic safety valve (18). When a flame-free signal is output from the flame detection circuit (46), power supply to the electromagnetic safety valve (18) and the electromagnetic opening / closing valve (30) is stopped to prevent spouting of raw gas.

The temperature control circuit (55) of the arithmetic circuit (40) is
The cooking temperature is set according to the type of cooking set by the cooking determination circuit (54), and the set cooking temperature and temperature detection circuit
Open / close valve drive circuit (51) to compare the temperature of the cooking target output from (47) and maintain the temperature of the cooking target at the cooking temperature.
The solenoid open / close valve (30) is opened and closed via the
Control (6) strong and weak combustion.

On the other hand, the temperature control circuit (55) closes the electromagnetic safety valve (18) and closes the stove when the temperature of the food to be cooked further reaches the high cut temperature even if the burner for the stove (6) is slightly burned. Extinguish the fire by stopping the gas supply to the burner (6).

When the burner (6) for the stove is extinguished, a buzzer or the like is used to notify the user, and the fire extinguishing operation of the ignition knob (12) is prompted to further enhance safety.

[0030]

According to the structure of the present invention, the temperature of the object to be cooked is detected by the temperature sensor, and the detected temperature is compared with the cooking temperature preset by the temperature control circuit to open / close the self-holding type electromagnetic on-off valve. By controlling the burner for the stove by strong and weak combustion, the electromagnetic safety valve is closed to extinguish the burner for the stove when the temperature of the food to be cooked further rises to the high cut temperature even if the combustion is weak. , It is possible to adjust the thermal power of the burner and to perform safety control by using a battery power source, and improve workability when installing the burner in a kitchen or the like.

Further, according to the present invention, the type of the object to be cooked is determined by the cooking determination circuit, and the cooking temperature or the high-cut temperature is set according to the type of cooking. It is possible to improve usability without extinguishing fire and interrupting cooking.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment according to the present invention.

FIG. 2 is a side vertical cross-sectional view of the same valve device.

FIG. 3 is a block diagram of a combustion control circuit of the same.

[Explanation of symbols]

 6 Burner for stove 15 Temperature sensor 18 Electromagnetic safety valve 28 Control valve 30 Electromagnetic on-off valve 33 Bypass passage 54 Cooking judgment circuit 55 Temperature control circuit

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuaki Tabuchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd. (72) Inventor Toshiyuki Yamazaki 3-201 Minamiyoshikata, Tottori City Tottori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A self-holding electromagnetic opening / closing valve in which an electromagnetic safety valve and a control valve for adjusting a gas supply amount by a manual operation are provided in a gas passage to a burner for a stove, wherein the solenoid valve is a self-holding type in an appropriate place of the gas passage. And a temperature sensor for detecting the temperature of the food to be cooked by the burner for the stove, which is connected in parallel to the on-off valve through a bypass passage for passing a predetermined gas amount, and the temperature sensor. When the temperature of the cooking target detected by the above is compared with a preset cooking temperature to control the opening / closing of the electromagnetic on-off valve, and when the temperature of the cooking target rises above the high cut temperature set higher than the cooking temperature. A gas control device for a stove, comprising a temperature control circuit for closing the electromagnetic safety valve. 2. A cooking determination circuit for determining the type of the object to be cooked is provided, and the setting of the cooking temperature or high cut temperature of the temperature control circuit is changed according to the type of cooking determined by the cooking determination circuit. The above-mentioned claim 1 characterized by the above-mentioned.
A gas control device for a stove according to.