JPS5949498B2 - gas cooker - Google Patents

Description

Detailed Description of the Invention The present invention relates to a gas cooker such as a gas open type cooker, and its purpose is to control the amount of combustion by forcibly varying the gas supply pressure to the gas burner according to the set internal temperature. By doing this, the difference in the actual temperature inside the refrigerator between when the gas burner was turned off at 08:00 after the actual temperature inside the refrigerator reached the set temperature was reduced, the temperature inside the refrigerator was more stabilized, and the baking of the food was ensured. It is in.

With conventional gas ovens, ■ Temperature indications such as ``low, medium, and high'' are installed on the oven door, etc.
For example, if the cooking temperature is set to ``medium,'' open the cooker fully, and when the pointer reaches ``medium,'' tighten the cooker and set the cooking temperature to the cooking temperature. put in.

When food is put in the oven, the temperature inside the oven drops, and the cock is then opened and closed to adjust the temperature until the pointer stabilizes in the "medium" position, but this operation is time-consuming and inconvenient.

■.In the case of a device that senses the temperature inside the refrigerator with a liquid expansion type sensing rod, etc., controls the control valve ON-OFF based on this sensing signal, and controls the temperature to the set temperature by turning ON-OFF the gas burner.a. The secondary pressure is determined by (LP gas, natural gas, city gas), and the calorific value of the gas burner during combustion (Okcal/) is approximately constant.When controlling the internal temperature to the set temperature, the settable temperature Area T1-T2
No matter what temperature you set within the ℃ range, it is always Okcal/)
(The temperature was controlled to that set temperature.

The range of 11-12℃ is generally 100℃-300℃, but within this range (although there are differences depending on the food)
This control means often resulted in poor cooking results.

This is 10% higher than the set temperature, for example 200℃.
0N-OF with the same calorific value 0kcal/H at 0℃
In order to perform F control, especially when controlling the set temperature on the low temperature side, if the internal sensor itself detects the set temperature, the temperature in the center of the refrigerator has already exceeded the set temperature, and the temperature that exceeds the temperature will cause the temperature to exceed the set temperature. This had a negative effect on the degree of baking of the food.

■In gas ovens with electronic proportional control, a.In the latest gas ovens, an electronic proportional control valve is used to increase the resistance of the internal sensor (thermistor) when the internal temperature is lower than the set temperature. When the signal is sent to the comparison amplifier circuit (control box), the comparison amplifier circuit reads the voltage difference and increases the current supplied to the coil of the electronic proportional valve, driving the proportional valve to increase the heat output of the burner and reduce the heat output from the burner. Raise the internal temperature.

When the internal temperature is reached, the resistance value of the internal sensor becomes low and the voltage difference disappears, reducing the current supplied to the proportional valve and reducing or cutting combustion.

The advantage of this electronic proportional control is that stepless control is possible, the response is fast, and it follows the set temperature best, but since it uses an electric circuit, it increases the cost and reliability of the equipment, making it insufficient for marketability. there were.

The present invention solves the above-mentioned conventional problems, and embodiments thereof will be described below with reference to the drawings.

In the figure, 1 indicates a gas oven.

Reference numeral 2 denotes an ignition gas cock, which is the main valve for supplying gas into the gas appliance, and at the same time works in conjunction with the electromagnetic safety valve 3 to ignite the pilot burner 4 and pilot burner 5, heat the thermoelement 6, and open the electromagnetic safety valve 3. maintain the condition.

In addition, the ignition gas cock 2 is connected to the solenoid valve 70 in conjunction with the ignition operation.
Close the circuit and open it.

Reference numeral 8 denotes a universal governor that adjusts and varies the secondary pressure using a slide knob 11.

The operation of varying the operating point at which the internal temperature sensor 9 turns the microswitch 10 of the solenoid valve 1 ON-OFF is linked to the slide knob 11 of the universal governor 8.

12 is a main burner, and 13 is a flash pipe, which transfers the flame from the pilot burner 5 to the main burner 12.

Items enclosed within the dashed line are located inside the refrigerator.

In Figures 3 to 5, 14 is a temperature display panel, 100
Temperatures can be set from °C to 300 °C.

When the slide knob 11 matches the set temperature scale, the first gear 15 connected to the slide knob 11 moves to the gear support point 16.
The cam gear 17 that meshes with the cam gear 17 rotates.

A cam 19 for each gas group is formed in the cam portion 18 of the cam gear 17 so as to be selectively used depending on the gas type, and this cam 19 provides a universal system.

Reference numeral 20 denotes a spring pressure adjusting body of the governor section 21 which is moved left and right in the figure by the cam 19 to adjust the spring pressure applied to the diaphragm valve 22 to control the flow rate of the passing gas.

On the other hand, a rack 24 is fixed to the arm 23 of the first gear 15, and this rack 24 meshes with a pinion 25.

The rotation of the pinion 25 is transmitted to the adjustment shaft 27 connected by a pin 26 to the switch box 2 of the chamber sensor 9.
The temperature of the solenoid valve 1 when it is ON or OFF is set by varying the stroke of the microswitch 100 inside the valve 8.

The operation will be explained below.

When igniting, slide knob 1 to make it the easiest to ignite.
1 to the 300C scale where the highest pressure is produced.

The door 29 is opened, the safety lock is removed, the ignition gas cock 2 is rotated approximately 90 degrees in the direction of ignition, and held in that position for a certain period of time until the electromagnetic safety valve 3 is opened.

This ignition operation opens the electromagnetic safety valve 3, and also opens the pilot burner 4, pilot burner 5, and main burner 1.
2 are ignited one after another, and when the hand is removed after a certain period of time, the pilot burner 5 and the main burner 12 remain in a burning state.

Close the door 29, select the temperature setting, and press the slide knob 11.
Adjust to the set temperature scale, for example 100°C.

In this embodiment, at this time, the governor secondary pressure is set to LP gas - secondary pressure 28
0 glH20 was changed to 120nH20.

(Of course, the cam 19 of the cam gear 17 is also set in advance to the LP gas cam.) By sliding the slide knob 11 over the temperature scale range of 100 to 300°C, the governor secondary pressure can be varied within the range of 120 to 260 mH2. , burner 12
Proportionally varies the amount of combustion.

On the other hand, the operating stroke of the switch 10 of the solenoid valve 7 which is turned ON-OFF by the sensor 9 in the refrigerator is also controlled by the slide knob 1.
It is set in conjunction with slide 1.

After a certain period of time has passed, the temperature inside the refrigerator exceeds the set temperature of 100℃,
When this is detected, the solenoid valve 7 is turned to 0FFL, and then the 0N-OFF operation is repeated.

In this embodiment, as shown in Figure 6, the temperature at the center of the refrigerator is 1.
When the temperature is 30°C, the solenoid valve 7 is 0FFL and the burner 12 is also turned off, and when the temperature is 96°C, the solenoid valve 7 is turned on.

The temperature difference was 130°C - 96°C = 34 degrees.

With the above configuration, the present invention has the following effects.

(1) As shown in Figure 6, in the case of LP gas, in the conventional example, when the gas chamber secondary pressure is 260 m x H20, the control curve changes between 138 °C and 98 °C for a set temperature of 100 °C, and the difference is 40 °C. It was deg.

- In the case of strength wood example, the difference is 34 between 130℃ and 96℃.
It was deg.

Although not shown in the graph, even at 200°C, the conventional model has a temperature of 38 degrees.

In this example, it was 32 degrees.

Both are low in this example by about 6 deg or more, and moreover, 10 deg.
In the case of 0°C, there is an 8°C difference in the highest temperature and a 2°C difference in the lowest temperature, indicating that the high temperature side is well suppressed and the low temperature side is not suppressed too much.

As shown in FIG. 7, the cooking results of the present invention are excellent for both roll cakes and meringue flour.

For roll cakes, the rise height (which can be changed depending on the volume after swelling) is 2.5 m higher, and for meringue flour, the color of the surface after baking is lighter.

(2) In the present invention, the temperature inside the refrigerator can be controlled simply by aligning the slide knob with the set temperature scale, and the operation is simple.

The same effect as the present invention can be obtained by operating the temperature scale and regulating the governor's secondary pressure using separate dials instead of the sliding type, but for example, if the governor's secondary pressure is set to the lowest and the set temperature is set to the highest. If the refrigerator is used in a vacuum, the temperature inside the refrigerator may not reach the set temperature.

On the other hand, if the secondary pressure is set to the maximum and the set temperature is set to the minimum, the result will be the same as in the conventional example, and in either case, erroneous operation is likely to occur.

(3) The present invention is low cost compared to gas ovens and the like that use electronic proportional valves.

[Brief explanation of the drawing]

Fig. 1 is an external perspective view of a gas cooker showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the gas circuit, Fig. 3 is a sectional view of the control section,
FIG. 4 is a perspective view of the same, FIG. 5 is an external perspective view of the space seen from the back side, FIG. 6 is a comparative explanatory diagram with a conventional example, and FIG. 7 is a comparative explanatory diagram showing the cooking condition. 8...Governor, 9...Sensor, 11
...Knob, 12...Gas burner (main burner).

Claims (1)

[Claims] 1. A gas burner that heats the inside of the refrigerator, a control device using an inside temperature sensor that detects the inside temperature and turns combustion of the gas burner ON-OFF to control the inside temperature to a set temperature within a certain range, and the gas burner. and a governor that forcibly varies the gas supply pressure of the gas burner for each selected set temperature, varies the combustion amount for each selected set temperature, and controls the internal temperature of the gas burner to the set temperature. A slide mechanism that links the pressure adjustment operation for each selected set temperature of the governor that determines the combustion amount and the operation temperature setting operation of the internal temperature sensor, and linearly operates the knob operation mechanism in the linked operation. A gas cooker having a universal governor that varies the combustion amount of the gas burner for each set temperature.