JPS5958783A - Composite cooking device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an installation configuration for an abnormal temperature detection device that can constantly detect the outflow of hot air from the heating chamber of a complex cooking device to the machine room and the abnormally high portion of a high-frequency heating device. It is something.

Conventional Structure and Problems Traditionally, this type of composite cooker has been equipped with an operating section 19 on the front of the main unit for high-frequency heating cooking, etc., as shown in Figures 1 to 4 (C).
When you operate the cooking start button on the cooker provided in the , high voltage is applied from the high voltage transformer to the high frequency generator 8, and the high frequency generated by the high frequency generator 8 is supplied to the heating chamber 1 through the waveguide. , the cooling fan 9 operates to suck in outside air and cool the high frequency generator 8. The air that has cooled this high-frequency generator 8 is generally discharged from the top or bottom of the main body, but the steam generated from the object to be heated in the heating chamber 1 by high-frequency heating is In order to prevent dew from forming on the wall surface, hot air is supplied into the heating chamber 1 from a hot air intake 11 provided on the side wall 10 of the heating chamber via an air guide 12, and an exhaust hole 13 provided on the side wall 10 of the heating chamber. It was being discharged out of the main unit along with steam. In addition, in the case of cooking using an oven, a heat source (electric heater or gas burner) installed in compartment 3
operates, the circulation fan 6 for hot air circulation rotates, blows hot air into the heating chamber 1 from the hot air circulation port 6 provided on the rear wall 4 of the heating chamber, and By re-manipulating the cycle of heating and inhaling into compartment 3,
Cooking is performed.

During this oven cooking, if hot air enters the machine room 7 where the high frequency generator 8 and other electrical components are located from the warm air outlet 11 on the side wall 1o of the heating chamber, which is provided to draw air into the heating chamber 1 during high frequency heating, it will lead to Since insulation breakdown of wires, etc. and melting of parts may occur, a shutter 17 (Fig. 2) and a solenoid 18 to drive the shutter are attached to the air guide 12. However, the structure was complicated and caused an increase in costs.

Therefore, when cooking in the oven, the circulation fan 6 and cooling fan 9
A configuration has been considered in which the intrusion of hot air from inside the heating chamber 1 is cut off by the balance of wind pressure obtained by driving the oven, but when the cooling fan 9 stops for some reason during oven cooking, only the circulation fan 6 When it rotates, the hot air from inside the heating chamber 1 enters the heating chamber 7 through the hot air outlet 11, so the above-mentioned drawback occurs again. In addition, even when cutting off hot air using a 7-layer, there is a possibility that the air guide 12 will not be cut off due to failure of the air soter configuration, the solenoid, or the thing that controls the solenoid, so countermeasures against failure are necessary. Ta.

In addition, if the cooling fan 9 stops or separates from the motor shaft during high-frequency heating, the high-frequency generator 8 will not be air-cooled and will become abnormally high in temperature due to the heat generated by oscillation, eventually becoming unable to oscillate. Become.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems and provides a high frequency generator. The purpose of the present invention is to provide a highly reliable and safe high-frequency heating device that prevents malfunctions, melting, etc. due to abnormal temperature rises of electrical components in the machine room.

Structure of the Invention The present invention comprises a heating chamber for storing an object to be heated, a compartment adjacent to the heating chamber, a heat source provided in the compartment, and a punching hole provided on the wall of the heating chamber. a circulation fan that circulates air in the heating chamber and the compartment; a high-frequency generator that supplies high-frequency waves into the compartment; a cooling fan that cools the high-frequency generator; and a cooling fan that cools the high-frequency generator. an air guide guided into the heating chamber through a punching B provided on a side wall of the heating chamber,
When cooking in an oven, hot air is cut off from entering the heating chamber by the balance of wind pressure obtained by driving the cooling fan) and circulation fan, and when the cooling fan fails, the hot air is cut off by the shutter mechanism. In case of failure of the shutter mechanism or even failure of the cooling fan during high-frequency heating, the system uses an abnormal temperature detection device attached to the high-frequency generator to stop the operation of the composite cooker for safety. be.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

Figure 5 is a cross-sectional view of the main parts of a composite cooker configured to block the leakage of hot air from the heating chamber by the balance of wind pressure obtained by driving a circulation fan and a cooling fan, where arrow W indicates the cooling fan. This shows the movement of the wind if the system fails and stops.

In the figure, there is a door 2 installed at the opening of the heating chamber 1 that can be opened and closed at +7ii in front of the heating chamber 1 that stores the object to be heated. 03 is a compartment adjacent to the rear of the heating chamber 1. Compartment 3
An electric heater or gas burner as a heat source (not shown) is installed inside the heating chamber, and the heating chamber is a circulation fan installed in the compartment 3, and the air heated by the heat source in the compartment 3 is passed through the hot air circulation port 5. During cooking in a royal oven, the air is balanced as shown in Figure 3, so the hot air is circulated between the heating chamber 1 and the compartment 3.
does not invade. However, if the cooling fan 9 that cools the high-frequency generator 8 stops, a single warm air type fan installed on the side wall 1o of the heating chamber is used to send the air that has cooled the high-frequency generator 8 to the heating chamber 1 during high-frequency heating. 11, hot air enters the machine room 7 via the air guide 12.

In addition, hot air also leaks from another outlet 13 provided on the wall of the heating chamber to discharge steam generated in the heating chamber 1 during high-frequency heating, so the rate of hot air entering the machine room 7 is not so fast. The air enters along the wall surface of the air guide 12, hits the partition plate 14 provided in the ventilation path, passes through the high frequency generator 8, and gradually increases the temperature of the machine room 7. ′
? In addition, since the partition plate 14 is attached to the high-frequency heating device 8, it will block the passage of cooling air from the high-frequency heating device 8 during normal operation, but since it is located close to the cooling fan 9, the wind pressure is high and cooling will not deteriorate. It is desirable that the partition plate 14 be less than half the width of the high frequency generator 8.

In this embodiment, as shown in FIG.
A Y4 normal temperature detection device (hereinafter referred to as a thermal limiter) 15 is attached to the y4, and this thermal limiter 15
is inserted into the power circuit of the composite cooker.

Next, the operation of the thermal limiter 16 will be explained.

As mentioned earlier, regarding the hot air leakage of the composite cooker,
According to this embodiment VC, the hot air flowing out from the heating chamber 1 flows along the wall surface of the air guide 12 and hits the partition plate 14 provided in the high frequency generator 8, so the temperature of the partition plate 14 rises and the air is removed from the air guide 12. Installed thermal limiter-1
The temperature of the sensitive part 5 also rises, and finally the power circuit of the composite cooker is opened to stop all functions including the heat source provided at the rear of the heating chamber 1.

Furthermore, if the cooling fan 9 that cools the high-frequency generator 8 stops during high-frequency heating, the high-frequency generator 8 will reach an abnormally high temperature, and the partition plate 14 attached to the high-frequency generator 8 will also rise in temperature due to heat conduction. So, thermal limiter
15, similarly to the above, the power of the composite cooker is opened and all functions including oscillation are stopped.

However, the operating temperature of the thermal limiter 15 is the IE normal operation of the composite cooker, for example, when cooking in an oven, the maximum setting temperature is set and the load is placed in the heating chamber 1, and when high frequency heating is performed, the load is not placed in the heating chamber 1. It must be set to a temperature that does not work.

Therefore, in the present invention, the seven thermal limiters 15 can prevent overheating of the machine room 7 due to hot air leaking from the heating chamber 1 during oven heating and abnormally high temperature of the generator during high frequency heating.

Effects of the Invention As described above, according to the present invention, a partition plate for the ventilation passage is attached to the high frequency generator, and a thermal limiter is attached to the partition plate.
By ridged, it is possible to detect abnormally high temperatures in the machine room during open heating and abnormally high temperatures in the high-frequency heating device.
Thermal limiters can be shared, reducing the number of parts.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the main part U4 of a conventional composite cooker during high-frequency heating, and Figure 2 is an oven-like J! J! A cross-sectional view of the main part of II6, FIG. 3 is a plan cross-sectional view showing a state in which the circulation fan and cooling fan are driven during oven cooking in the oven,
Fig. 4 shows the main part of the air guide part of the pump:]
5 is a plan sectional view of a composite cooking device according to an embodiment of the present invention, and FIG. 6 is a perspective view of the appearance of the high frequency generator portion of the cooker. 1... Heating chamber, 3... Compartment, 5... Hot air circulation I'', 6
・Circulation fan, End...Machine room, 8...High frequency generator, 9...Cooling fan, 11...Hot air inlet, 12...Air guide, 14. Partition plate, 16...Thermal limiter (field) A wet hemp favorite output device).

Claims (1)

[Claims] The heating is carried out through a heating chamber that stores the object to be heated, a compartment connected to the heating chamber, a heat source provided in the L;13 compartment, and a hot air circulation port provided on the wall of the heating chamber. a circulation fan that circulates air within the room and the compartment; a high-frequency generator that supplies high-frequency waves into the heating chamber; a cooling fan that cools the high-frequency generator; and a high-voltage transformer that applies high pressure to the high-frequency generator. , a machine room that houses electrical parts such as the high frequency generator, a cooling fan, and a high pressure lance; and the air that has cooled the high frequency generator into the heating chamber through a hot air inlet provided on the wall of the heating chamber. a partition plate is provided in the ventilation path of the air flowing from the heating chamber through the hot air inlet and the air guide into the machine room, and the partition plate is fixed to an outer wall of the high frequency generator. Further, an abnormal temperature detection device is provided on the partition plate to detect outflow of hot air from the heating chamber and abnormal high temperature of the high frequency generator.