JPS58150722A - Composite cooker - Google Patents

Abstract

PURPOSE:To prevent a high-temperature air from flowing in a side of a heating chamber and to prevent a trouble from occurring to resin parts or electric switches, by a method wherein a main exhaust duct and an auxiliary exhaust duct are installed in a projecting manner along two sides, crossing each other at right angles, of the upper surface plate of the heating chamber, and the flow of air to a cooling fan is checked by the main and an auxiliary exhaust duct. CONSTITUTION:An auxiliary exhaust duct 3, having temperature and humidity sensors, is mounted to an upper surface of a heating chamber 1, and a main exhaust duct 4 and the auxiliary exhaust duct 3 are positioned in a manner to horizontally cross each other at right angles so that exhaust gas in the auxiliary duct 3 joins gas in the main exhaust duct 4. A part of air flows onto an upper plate 2 through a right side 8 side, collides against the auxiliary exhaust duct 3, flows along the duct 3, is guided to the main exhaust duct 4, returns back to an original cooling fan 6, and the cycling is repeated. Meanwhile, a part of air entering a heating chamber 1 from a cooling fan 6 passes through the auxilary exhaust duct 3 from an auxiliary exhaust hole 21 in the upper plate 2 of the heating chamber 1, flows to the main exhaust duct 4, and is exhausted to the outside of a cooker. A sensor detects a change in an exhaust gas temperature or a relative humidity in the auxiliary exhaust duct 3, and a temperature control and control of a high-frequency oscillating output take place by means of a signal therefrom.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooking device that combines an oven using gas as a heat source and a microwave oven that performs high-frequency heating, and particularly to a cooling structure for preventing an increase in the temperature of the cooking device.

A conventional combination cooker is shown in Figure 1. Compared to a microwave oven, when using a gas oven, the set temperature is sometimes as high as 300°C, and failure of various parts due to temperature rise is one of the problems. It was. For example, a sub-exhaust duct (3) in which a temperature sensor and a humidity sensor (not shown) are installed is provided on the top plate (2) of the heating chamber 1, and a main exhaust duct (n) extending from the fan chamber housing the hot-air circulation fan. 4, all of the sub-exhaust ducts 3 merged together. The wind from the cooling fan 6 that cools the magnetron 6 cools the magnetron 6 or other electrical components, and flows over the top plate 2 of the heating chamber 1. It also flows to the left side 7 on the opposite side of the heating chamber 1, and blows through the door. Accidents have occurred in which the resin door rollers that support the door arms of cars melted.

The present invention aims to eliminate the above-mentioned conventional drawbacks, and in particular to effectively cool the upper surface of the heating chamber, thereby lowering the body temperature of the heating chamber.

In order to achieve the above object, the composite cooking device of the present invention includes a heating chamber that stores an object to be heated, a high frequency oscillator that supplies high frequency power into the heating chamber, another heating means that heats the inside of the heating chamber, and A cooling fan that cools a high-frequency oscillator, and a main exhaust duct and a sub-exhaust duct that communicate with the heating chamber, the main exhaust duct and the sub-exhaust duct extending along three orthogonal sides of the top plate of the heating chamber. The airflow from the cooling fan is blocked by the upper and sub-exhaust ducts, which prevents high-temperature air from flowing into the sides of the heating chamber. The purpose is to prevent accidents caused by temperature rise.

An embodiment of the present invention will be described below based on the drawings.

In FIGS. 2 to 4, a magnetron 5 and a cooling fan 6 are provided on the right side 8 of a heating chamber 1 that houses an object to be heated (not shown). In addition, the right side 8 side and the left side 7 of the heating chamber 1
A door row 211 made of resin that supports the door arm 10 of the door 9 is provided on both sides. 12 is a spring that urges the door arm 10; 13 is a door switch that is turned on and off in conjunction with the opening and closing of the door 9; and 14 is a door rotation axis. The heating chamber 1 communicates with the entire fan chamber 17 that accommodates a hot air circulation fan 16 through a partition wall 16. The partition wall 16 is provided with suction holes and blow holes (not shown) for circulating hot air. A main exhaust duct 4 is connected to the upper surface of the fan chamber 17, and the main exhaust duct 4 is discharged outside the device through an exhaust port 19 provided in the upper case 18 of the main body case. Further, a sub-exhaust duct 3 equipped with a sensor such as a temperature sensor or a humidity sensor is connected to the upper surface of the heating chamber 1, and the exhaust gas in the sub-exhaust duct s flows into the main exhaust duct 4. The sub-exhaust duct 3 is provided at the left end of the top plate 2 of the heating chamber 1, with a length δ extending from depth to width as shown in the figure. In other words, the main exhaust duct 4 and the sub-exhaust duct 3 are arranged in the following shape in a plan view.

In the above configuration, when the microwave oven and the gas oven are used simultaneously, the gas burner 20 burns and the magnetron 6 oscillates, but the cooling fan 6 also rotates to cool the magnetron 5 and other electrical components.

A part of the air flows from the right side 8 side onto the -F face plate 2 of the heating chamber 1 and hits the sub-exhaust duct 3, and flows along this n1.
It is led to the main exhaust duct 4 and returns to the original cooling fan 6.
Repeat the cycle.

On the other hand, a part of the wind from the cooling fan 6 that entered the square heating chamber 1 is
From the sub-exhaust hole 21 of the top plate 2 of the heating chamber 1 to the sub-exhaust duct 3
It flows into the main exhaust duct 4 and is discharged outside the device.

A sensor detects the amount of change in the exhaust temperature or relative humidity in the sub-exhaust duct 3, and the temperature is controlled or the high-frequency oscillation output is controlled a1 based on the signal. Further, a portion of the hot air circulating within the heating chamber 1 is discharged from the main exhaust duct 4 to the outside of the chamber.

According to this embodiment, even if the door roller 11 is made of synthetic resin with a lower heat resistance than the conventional one, the high-temperature wind on the top plate 2 of the heating chamber 1 will not be blocked by the main and sub-exhaust ducts 3. Therefore, the temperature rise on the left side surface 7 side can be made lower than before due to the flow between the ventilation holes 22 and 23, and can withstand it sufficiently.

Similarly, the temperature rise of the door switch 13 is low, improving durability and safety, and reducing the risk of failure.

As described above, the following effects can be obtained by using the present invention.

(1) Since the wind from the cooling fan is prevented from blowing from the top to the left side by the windbreak on the top plate of the heating chamber, the temperatures of the door rollers and door switches can be significantly reduced, improving economic efficiency and reliability.

(i) If the sub-exhaust duct is made large, the amount of exhaust gas will be sufficient, so it will be easy to detect with a sensor and accurate temperature and humidity detection will be possible.

[Brief explanation of drawings]

Figure 1 is a partially cutaway external perspective view of a conventional composite cooker;
The figure is a partially cutaway external perspective view of a composite cooking device according to an embodiment of the present invention, FIG. 3 is a partially cutaway side view of the same, and FIG. 4 is a front view of the main parts of the same. 1...Heating chamber, 2...Top plate, 3...
...Sub-exhaust duct, 4...Main exhaust duct,
6... Magnetron, 6... Cooling fan, 20... Gas burner. Name of agent: Patent attorney Toshio Nakao and one other personii
Figure 2 Figure 2 Figure 3' -105 Figure 4

Claims (1)

[Claims] A heating chamber that stores an object to be heated, a high frequency oscillator that supplies high frequency waves into the heating chamber, another heating means that heats the inside of the heating chamber, a cooling fan that cools the high frequency oscillator, and communicates with the heating chamber. A main exhaust duct and a sub-exhaust duct are provided. A composite cooker configured to be blocked by an exhaust duct.