JPH023046Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an improvement in the heating method control of a composite heating device.

Configuration of the conventional example and its problems The configuration and problems of the conventional example will be explained using FIGS. 1 and 2. Figure 1 is an external view of the main parts of a conventional composite heating device, where 1 is the outside, 2 is the door, 3 is the timer for the high-frequency heating device, and 4 is the timer for the second heating means such as an electric heating device or a gas combustion device. a timer; 5 is an output switching switch button for the high-frequency heating device; 6 is the second
Represents a temperature regulator knob for the heating means.

FIG. 2 shows an example of a circuit in a conventional example of a heating device constructed as described above, and a is a door switch which is turned on when the door is closed. b is the time switch of the high-frequency heating device, and 7 is the fan motor, and the switch e is intermittent in conjunction with the rotation of the motor.
d is a changeover switch linked to the output changeover switch button 5, 10 is a high voltage transformer, 1 is a high voltage transformer;
1 is magnetron, 12 is high voltage capacitor, 13
are diodes, and these 10 to 13 constitute a high frequency oscillation device. With this configuration, timer 3
When the fan motor 7 is operated, the time switch b is turned on, and when the changeover switch d is turned on (ON), continuous oscillation occurs even if the intermittent switch e interlocked with the fan motor 7 is intermittently oscillated and the output becomes "strong". Furthermore, when d is off, it is restricted by the intermittent switch e and oscillates intermittently, producing a "weak" output. The electric heating device or gas combustion device 8 configured in parallel with such a high frequency oscillation circuit is operated by turning on a time switch c by operating a dedicated timer 4.
Reference numeral 4 represents a volume controller operated by the temperature controller knob, and reference numeral 9 represents a temperature detection element such as a thermistor. As mentioned above, according to such a conventional example, heating can be performed simultaneously with both the high frequency output "strong" and "weak" set simultaneously by the timer, and the fact that many heating patterns can be created is seemingly advantageous. It may seem like this, but simultaneous heating with high power output is problematic in the following respects.

First of all, from a cooking perspective, simultaneous heating is effective in improving the performance and shortening the time of oven cooking.
The heat from the oven is used to create a golden brown color and then bake it. Typical examples include meats such as roast chicken and roast beef, but if you use "high power", the center will be heated quickly, but
This is a problem because the meat juices, which are the source of the flavor, are drained out, resulting in a brittle finish. On the other hand, if you use ``low power'', the meat will be cooked through the inside without any excessive juices coming out, and combined with the oven heating from the surface side, the inside will be soft and the outside will be browned and fragrant. Other typical examples include stew-like dishes such as beef stew and curry. In this case, if "high power" is used in combination, the heating itself will naturally be faster as described above, but the food will not boil over or boil because the heating is too strong. When doing this type of stewing in the oven, compared to when doing it on the stove, you cannot stir it occasionally, so you can use low power to gradually cook solid foods such as meat, potatoes, carrots, etc. The trick is to simmer the food until it simmers, combining the heat from the outside with the heat from the outside. As shown in these typical examples, "weak output" is generally more suitable for simultaneous heating with high-frequency heating, and strong output is not required. However, in the conventional example,
Since it is possible to simultaneously heat with "high output", there are problems such as cooking failures or problems with the finished product. Furthermore, if we tried to use an electric heating device as the second heating means, it would be difficult to achieve high output because of the power supply capacity (15 to 20 amperes is common in Japanese homes). do not have. There are examples where gas is used as the second heating means, but if the structure allows for simultaneous use with "strong output", power supplies such as a magnetron, which itself is a heating element, or a high-voltage transformer may be used as the second heating means.
Due to the thermal influence of the heating means, more heat countermeasures are required than necessary compared to single heating at "high output" or simultaneous heating at "low output", which also has the drawback of increasing costs.
This is exactly the same even when the second heating means is an electric heating device.

As mentioned above, in the conventional example, problems were caused not only in terms of cost but also in terms of cooking performance.

Purpose of the Invention The present invention aims to eliminate the above-mentioned drawbacks of the conventional circuit, and aims to achieve the object with an extremely simple circuit configuration and external operations, etc., which are the same as those of the conventional circuit.

Structure of the invention In order to achieve the above object, the invention has a circuit structure that operates simultaneously by setting timers provided for each heating means at the same time, and the high frequency output selector switch is always set to a weak output regardless of the setting. This circuit configuration has the following effects: constant cooking conditions, miniaturization of power supply components, cost reduction, and simultaneous heating with an electric heating device.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and 4. Figure 3 shows "weak output" as in the conventional example.
An example is shown in which this is done by an on/off switch linked to a fan motor, and FIG. 4 shows an example in which this is done by switching the capacitor capacity. The basic configuration is the same as the conventional example, with some additions made to achieve the present invention, so only the added parts will be shown here. Also, the same symbols and numbers are all the same numbers.

In Fig. 3, f is a switch in another circuit of timer 3, which operates in synchronization with b, g is a switch in another circuit of timer 4, and 15 is a switch in another circuit of timer 4, when both of the timer switches f and g are turned on at the same time. A relay installed to operate when , h is this relay 1
This is a relay switch operated by 5.

In FIG. 4, 16 is a relay operated by output changeover switch d, k is a relay switch of relay 16, and j is the timer switch f, g.
This is a relay switch of relay 15 that operates when both of j and k are turned on at the same time, and both j and k become high voltage changeover switches. 12-a and 12-b represent capacitors whose capacitances are divided, and when either of the high voltage selector switches j and k is turned off, 12-a is disconnected from the circuit, and only 12-b operates. It operates as a "weak output".

DESCRIPTION OF THE EMBODIMENTS According to the present invention configured as described above, as is clear from the explanation of the configuration, for example, in the case of the example shown in FIG. When both the timers 4 for operating the gas combustion device or the electric heating device, which are the heating means of 2, are operated, the respective timer switches b, f, c, and g are turned on, the relay 15 is operated, and the relay switch h is turned on. Even when the changeover switch d is in a strong output state (on state), the intermittent switch e, which operates in synchronization with the fan motor 7, operates intermittently to produce a "weak output".
This is what you get.

The same applies to the case of FIG. 4, where the timer switch f,
When g is turned on at the same time, the relay 15 operates, turning off the high voltage changeover switch j and disconnecting the divided capacitors 12-a to obtain a "weak output". In this case, the means for switching between strong and weak output by operating output changeover switch d is different from the third example, and relay 1 is switched on by turning on changeover switch d.
6 is activated, the other high voltage selector switch k is turned off, and capacitor 12-a is disconnected as described above to obtain a "weak output." Regardless of the state of output selector switch d, a weak output is obtained when the timer is set at the same time. It is something.

Effects of the invention As described above, according to the invention, the following effects can be obtained with slight changes in the circuit.

In other words, it is possible to automatically (unconsciously) avoid simultaneous cooking with high power as in the conventional case, so (1) cooking failures are eliminated because there is no overcooking or dryness caused by draining of meat juices, etc. .

(2) Simultaneous heating is limited to "low output", so there is no need for excessive heat countermeasures, and, for example, high voltage transformers can be downsized and costs can be reduced.

(3) According to the example in Figure 4, the power consumption of the high-frequency heating device during simultaneous heating can be reduced (depending on the low output setting, but in the case of an output of about 200W,
The power consumption is only about 500W), and simultaneous heating with an electric heating device is also possible.

[Brief explanation of the drawing]

Fig. 1 is a front view of a conventional composite heating device, Fig. 2 is a basic circuit diagram of the device, Fig. 3 is a circuit diagram of one embodiment of the present invention, and Fig. 4 is another embodiment of the present invention. FIG. 1... Body, 2... Door, 3... Timer for high frequency heating device, 4... Timer for second heating means, 5... Output selection switch button, 6... Temperature controller, 7... Fan motor , 8... second heating device, 10... high voltage transformer, 11... magnetron, 12... high voltage capacitor, 13... diode.

Claims (1)

[Scope of utility model registration request] A high frequency heating device, a plurality of heating means such as an electric heating device or a gas combustion device, a timer for controlling the respective heating time provided for each of the plurality of heating means, a high frequency output variable device, and an externally operable output changeover switch. and a circuit configuration in which the plurality of heating means operate simultaneously when the timer is set simultaneously, and a configuration in which the high frequency output is always set to weak regardless of whether the output selector switch is set to strong or weak. heating device.