JPH0366573B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a gas stove in which temperature control of a heated object or adjustment of burner firepower can be automatically set.

[Prior Art] The heating power of a gas stove was adjusted by a user such as a cook manually operating a gas flow rate control valve while observing the condition of the object to be heated.

[Problem to be solved by the invention] For this reason, it is necessary for the user to perform manual operations at any time depending on the purpose of cooking, the type and condition of the object to be heated, and it has been difficult to automate, save labor, and make cooking unmanned. .

An object of the present invention is to provide a gas stove that can automate cooking, save labor, and even make cooking unmanned.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a proportional solenoid valve that proportionally controls the amount of gas according to the amount of current, and a proportional solenoid valve that manually controls the amount of gas of the proportional solenoid valve so as to obtain a desired thermal power. A heating power setting means for setting, a sensor for detecting the temperature of the object to be heated, and a proportional solenoid valve so that the temperature of the object to be heated detected by the sensor is a temperature or a temperature range set according to the purpose of cooking. A temperature setting means for manual setting, a control pattern selection means for selecting an adjustment pattern including a storage means storing one or more adjustment patterns of the burner thermal power or the temperature of the object to be heated; controlling the amount of current of the proportional solenoid valve according to the setting by the thermal power setting means, increasing or decreasing the amount of current of the proportional solenoid valve by comparing the temperature set by the temperature setting means and the temperature detected by the sensor, and storing the amount of current of the proportional solenoid valve. When the adjustment pattern was selected, a configuration was adopted in which the amount of current of the proportional solenoid valve was controlled in accordance with the selected control pattern, regardless of the settings in the thermal power setting means and the temperature setting means.

[Operation and Effects of the Invention] In the case of manual setting using the thermal power setting means and the temperature setting means, the amount of current of the proportional solenoid valve is controlled according to the setting by the thermal power setting means so that the thermal power desired by the user is achieved. The burner firepower is set according to the purpose of cooking, and the current amount of the proportional solenoid valve is increased or decreased by comparing the temperature set by the temperature setting means and the temperature detected by the sensor. The temperature or temperature range can be set depending on the temperature.

When you select a memorized adjustment pattern, regardless of the settings in the heat setting means and temperature setting means,
The amount of current of the proportional solenoid valve is controlled according to the selected control pattern, so if data is stored in the storage means in advance according to various cooking purposes, the thermal power of the burner or the temperature of the heated object can be automatically controlled. can.

Therefore, automation of cooking and labor saving can be achieved.
There is also hope for unmanned cooking.

[Example] A is a gas stove, 101 is its main burner, 10
2 is a pilot burner for smoothly igniting the main burner 101, and 103 is an ignition device for the pilot burner 102. 104 is gas stove A
The gas supply path 11 is a safety electromagnetic valve (hereinafter referred to as a safety valve), and is provided downstream of the main valve 12 for normal gas. A thermocouple 13 is installed facing the main burner 101 so as to generate a thermoelectromotive force to keep the safety valve 11 open during normal combustion in the main burner 101, and when a misfire occurs, the safety valve 11 Automatically closes the valve. 14 is a pilot valve that opens temporarily during ignition operation, 15 is a push button for ignition, and 16 is a push button for extinguishing. When the ignition button 15 is pressed, the main valve 12, the safety valve 11, and the pilot valve 14 are opened, and a spark discharge is generated in the ignition device 103 to ignite the ignition, and the safety valve 11 is maintained in an open state by the thermoelectromotive force. When the fire extinguishing button 16 is pressed, the pressed state of the ignition button 15 is released and the fire is extinguished.

1 is provided between the safety valve 11 and the main burner 101, and as shown in FIG. 3, the valve body 1b is displaced according to the amount of current to the electromagnetic coil 1a, and the opening degree of the valve 1c is increased or decreased. This is a known proportional electromagnetic valve (hereinafter referred to as a proportional valve) in which the amount of gas is proportionally controlled, and in this embodiment, the amount of gas (flow) can be increased or decreased in the range of 0 to 2000 kilocalories/hour (hereinafter simply referred to as calories). A gas bypass 2 is provided in parallel with the proportional valve 1 and ensures a gas amount of 340 calories when the proportional valve 1 is closed.

A control circuit 3 controls the amount of current supplied to the proportional valve 1 according to an input signal, and has a configuration illustrated in FIG. 2. 5 is a heating power setting means manually operated by a gas stove user such as a cook to set the proportional valve 1 to the user's desired heating power; 6 is for detecting the temperature of an object to be heated such as a pot; The temperature sensor 7 is manually operated by the user, and the temperature sensor 7 is adjusted so that the temperature of the heated object detected by the sensor 6 becomes the temperature or temperature range set by the user according to the purpose of cooking. Temperature setting means 8 for setting the valve 1 heats the object to be heated at the maximum heating power when heating the proportional valve 1, for example,
After raising the temperature to ℃, the object to be heated is maintained at 100℃ for a predetermined period of time, and then kept at 60℃.
The proportional valve 1 is configured to heat the object to be heated in a predetermined pattern based on a large number of data stored in the proportional valve 1.
30 is a logic circuit that inputs these outputs and generates an output that controls the amount of current supplied to the proportional valve 1 and closes the main valve 12; It is a control section including.

FIGS. 4 and 5 show specific examples of the gas stove of the present invention. In this stove, 4 is a case of the stove, and 40 is its front panel. In this embodiment, the firepower setting means 5 is an operating lever 51 provided at the top of the panel 40, and the lever setting position is converted into voltage by a variable resistor (not shown) linked to the lever 51. It is designed to be input to the control section 30. When the operating lever 51 is set to the right end in the figure, the proportional valve 1 is fully closed;
Minimum heat power with bypass 2 only (340 calories)
is achieved, and when set to the left end in the figure, the proportional valve 1 is fully opened and the maximum thermal power (2200 calories) is obtained.

In this embodiment, the sensor 6 is connected to the main burner 101.
A thermistor is attached to the upper end of a rod 61 which is vertically movable in the center and is urged upward by a spring. It is designed to be pressed by surface pressure.

In this specific example, the temperature setting means 7 includes a lever 71 provided at the bottom of the front panel 40;
It consists of means (not shown) for converting the set position of the lever 71 into a voltage signal. When the lever 71 is set to the left end in the illustration, the temperature is 50°C, which is necessary to keep the heated object warm.
is the set temperature, and when set to the right end of the diagram, the upper limit temperature is 250℃, which is useful for preventing fires when making tempura.
is set.

In this embodiment, the control pattern selection means 8 includes four push buttons 8 provided on the front panel 40.
It has manual buttons 1 to 84 and a storage means 85 in which the temperature control pattern of the object to be heated is stored.

81 is a preset button for controlling the proportional valve 1 based on data stored in advance, regardless of the set position of the lever 51 of the heat setting means 5 and the set position of the lever 71 of the temperature setting means 7. . When this preset button 81 is pressed and the ignition device 103 is activated (the ignition button 15 is pressed), the proportional valve 1 is initially fully opened and the heated object is
The temperature is rapidly increased by heating at maximum heat until the first (set) temperature (for example, 100°C) is reached, and after the sensor 6 detects that the temperature has risen to the first temperature, the first temperature is maintained. Thus, the proportional valve 1 is throttled. Maintenance of this temperature is also achieved by repeating the valve opening of the proportional valve within a set range. Further, at this time, the proportional valve 1 may be fully closed to maintain heat using the minimum heating power. Furthermore, as shown in FIG. 2, a timer 31 may be provided in the control circuit 3 so that the holding time can be set. When the timer 31 is provided, the temperature is lowered to the second temperature after the set time elapses. After closing the proportional valve 1 and lowering the temperature to the second temperature, it becomes easy to set a fine control pattern such as maintaining the second temperature by further adjusting the valve opening degree.

82 is a rice cooking button provided exclusively for rice cooking. When the rice cooking button 82 is pressed together with the ignition button 15, the main burner 101 is turned on from the beginning as shown in FIG.
Said proportional valve 1 to obtain 850 calories of firepower
is set. Next, sensor 6 detects that the temperature of the heated object or the bottom temperature of the pot is the set temperature (usually 170℃).
When the temperature reaches the boiling point, the proportional valve 1 is fully closed and the combustion is stopped by closing the proportional valve 1 and switching to a low heat insulation using only the bypass 2, or closing the main valve 12.

In addition, patterns shown in c and d of FIG. 6 can also be selected.

In this way, the pressing operation of the operation button and the main burner 1
Cooking can be done automatically with just two operations: igniting the 01. As a result, cooking can be automated and labor-saving, and after the cook presses a predetermined button and ignites the gas, cooking can be performed even when the cook is away from the gas stove, making it possible to unattend cooking.

83 is an automatic extinguishing button, and this button 83
When the main burner 101 is ignited while pressing , the user can set the calories generated by the main burner 101 and the upper limit temperature of the object to be heated as desired by setting the heat setting means 5 and the temperature setting means 7. , and when the upper limit temperature is reached, the main valve 12
The valve closes to stop combustion, and an automatic extinguishing lamp notifies the user that combustion has stopped. At this time, other display means such as a sound generator may be used instead of the lamp.

84 is a heat retention button, and when this button 84 is pressed and the main burner 101 is ignited, the temperature setting means 7 will be heated at the heat set by the heat setting means 5.
The object to be heated is heated to the temperature set by
Performs repeated ON/OFF (fully open/fully closed) combustion, or automatically adjusts the throttle amount of the proportional valve opening.

Although the above embodiments have shown automation of presets and rice cooking, it is natural that many other control patterns can be stored and selected.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the configuration of the gas stove of the present invention, Figure 2 is a block diagram of the control circuit, Figure 3 is an enlarged sectional view of the proportional valve, Figure 4 is a perspective view of the gas stove, and Figure 5 is the gas stove. FIG. 6 is a partially enlarged front view of the operation panel section of , and a time chart showing the temperature change of the object to be heated and the thermal power of the main burner. In the figure, 1...proportional valve (proportional solenoid valve), 5...thermal power setting means, 6...temperature sensor (sensor), 7...
...Temperature setting means, 8...Control pattern selection means,
80...Storage means, 101...Main burner (burner).

Claims (1)

[Scope of Claims] 1. A proportional solenoid valve that proportionally controls the amount of gas according to the amount of current, a heating power setting means that manually sets the gas amount of the proportional solenoid valve so as to obtain a desired heating power, and a heating power setting means that controls the temperature of the object to be heated. A sensor to detect, temperature setting means for manually setting the proportional solenoid valve so that the temperature of the heated object detected by the sensor is a temperature or temperature range set according to the purpose of cooking, and thermal power of the burner. or control pattern selection means for selecting an adjustment pattern including a storage means storing one or more adjustment patterns for the temperature of the object to be heated, and in the case of manual setting, the proportional electromagnetic Controls the amount of current of the valve, increases or decreases the amount of current of the proportional solenoid valve by comparing the temperature set by the temperature setting means and the temperature detected by the sensor, and when the memorized adjustment pattern is selected, the thermal power A gas stove that controls the amount of current of the proportional solenoid valve according to the selected control pattern, regardless of the settings in the setting means and the temperature setting means.