JPS6115332B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a forced heat circulation type gas oven with a microwave oven that is safe and easy to assemble and service.

Recently, microwave ovens with an oven function that have a heater built into the heating chamber of the microwave oven have become popular.
However, in ordinary households in Japan, there is no commercial power supply.
The limit is about 100V and 15A. On the other hand, since the current consumption of a microwave oven is approximately 10 A or more, simultaneous heating with an electric heater and high frequency is extremely difficult. In this regard, if a microwave oven and a gas oven are combined, simultaneous heating using high frequency and gas firepower can be achieved without any problems in terms of capacity. However, safety is the biggest issue, especially the risk of gas explosion. Generally, the magnetron of a microwave oven is 3 to 4 KV, and the voltage is about 10 in the transient period immediately after the start of operation.
Since KV also generates high voltage, weak discharges may occur in times of high humidity. In particular, recently, electric contacts have been used in high-voltage circuits, so it can be said that the frequency of sparks is extremely high. If both gas leaks and sparks occur at the same time, a gas explosion will occur. Conventionally, the method of preventing explosions from electrical contacts and the like has been to surround them with wire mesh, but it is difficult to surround all the electrical components of a microwave oven with wire mesh.

Furthermore, it is difficult for electronics stores to service gas control parts and for gas stores to service electrical control parts, and it is necessary to solve this problem and improve product reliability and serviceability.

The present invention aims to solve this problem and realize a safe forced heat circulation type gas oven with a microwave oven.

An embodiment of the present invention will be described with reference to the accompanying drawings. FIGS. 1 and 2 are a sectional view and an exploded perspective view showing the configuration of a roasting box and a gas combustion chamber. 1 is a bottom plate having an air port 2 on the bottom surface, 3 is a roasting box whose front opening is opened and closed by a front door 4, a circulation outlet 6 is located approximately in the center of the back wall 5, circulation inflow holes 7 are provided on both sides, and exhaust is discharged upward. Holes 8 are formed respectively. 9 is an exhaust pipe connected to the exhaust hole 8; 10 is a heat source case that is separate from the roasting box 3 and attached to the back of the roasting box 3 via screws; the combustion chamber 11, the suction chamber 12, and a fan storage It has a box 13. The combustion chamber 11 is located at the lower part of the heat source case 10, and has a combustion air inlet 14 formed in the peripheral wall and a combustion gas vent 15 opening to the suction chamber 12 in the top wall, and a gas burner 16 is housed therein. It has been done. Further, the suction chamber 12 is formed so as to surround the circulation outlet 6 by its partition wall 17, and has a suction port 19 formed opposite to the suction side of the fan 18 provided in the storage chamber 13. Further, both sides of the fan storage box 13 constitute a discharge system path extending to both outsides of the suction chamber 12 and communicating with the circulation inflow hole 7. 21 is a motor that drives the fan 18, 22 is a cooling fan, and these fans 1
8, a motor 21, a storage chamber 13 serving as a casing, and the like constitute a fan mechanism 23. Note that the fan 18 is detachably attached to the shaft of the motor via a mounting screw 24. Further, 25 is a bottomed cylindrical guide facing the suction chamber 12, which is fixed to the mouth edge of the circulation outlet 6 via a screw, and 26 is a thermal fluid regulating port.

A high frequency introduction port 31 is opened in the center of the top surface of the roasting box 3, and a waveguide 58 is screwed into a hole 32 provided around the roasting box, and 33 is a stirrer that stirs the radio waves.
The upper blade 34 is connected to the stirrer 33 by a shaft 35 and is attached via a pin, and is configured to apply wind to the blade 34 and rotate the stirrer.

FIG. 3 is an exploded perspective view of the control chamber provided on the right side of the roasting box 3, viewed diagonally from behind. A top and bottom partition plate 51 made of galvanized steel plate is fixed horizontally, a high voltage transformer 52 and a phase advancing capacitor 53 are placed on it, a fan motor 54 is fixed to a body back plate 55, and a fan 56 is mounted on its rotation axis. It is attached. The magnetron 57 is fixed under the waveguide 58 at a position facing the fan. In addition, a stirrer rotation guide box 59 is installed in front of the magnetron 57,
Furthermore, a time switch 60, an interior light 61, etc. are installed on the upper side of the upper and lower partition plate 51, and a hose end 62, a gas tank 63, a governor 64, and a solenoid valve 6 are installed at the bottom.
5, etc. are installed, and a group of small holes 67 are bored in the rear body back plate 55. Furthermore, the upper and lower partition plates 5
A sealing material 68 is provided around the flange 1.

FIG. 4 is a right side view of the forced heat circulation type gas oven with microwave oven of this embodiment, and the body right side plate 70 is divided into upper and lower parts by the upper and lower partition plates 51, and includes a side plate A (71), It consists of side plates B (72), each of which is removable, with a louver 69 provided on the upper surface in the portion facing the transformer and on the entire lower surface. FIG. 5 is a sectional view taken along the line A-A' in FIG. 4, and shows a cross section of the louver 69.

The high temperature gas generated from the gas burner 16 passes through the combustion gas vent 15, mixes with the hot air from the thermal fluid regulation hole 26 and the circulation outlet 6 in the suction chamber 12, is sucked by the fan 18, and is stirred by the fan 18. , becomes even more uniform, is blown out from the circulation inflow hole 7, circulates inside the roasting box 3, is sucked into the fan 18 again, and a part of it is passed through the exhaust hole 8 into the exhaust pipe 9.
It is then discharged.

Note that the control room is divided by an upper and lower partition plate 51, and a sealing material 69 is applied around the flange of the partition plate 51, so that in the unlikely event that gas leaks, it will not flow toward the electrical control parts. The gas is discharged through the small hole group 67 of the body back plate 55 and the louver 69, thereby reducing the risk of gas explosion. Further, the magnetron 37 and the electric control parts are cooled by a fan 56, and the fluid is discharged to the outside, thereby preventing gas from entering the electric control parts. Furthermore, by forming the gas control parts at the bottom, heat rises upward due to the draft, so that the temperature of the gas control parts such as the governor 64 can be lowered.

In addition, gas parts are passed through in the completed state,
In order to check for gas leaks, a small flame is applied to the gas control parts, but because of the upper and lower metal partition plates 51, the flame does not reach the electrical control parts.

Further, right side plates 71 and 72 covering the microwave oven control parts and the gas control parts, respectively.
is divided into upper and lower parts by an upper and lower partition plate 51, and each can be removed, so that it can be serviced without touching dangerous areas such as the high voltage transformer 52.

In addition, the microwave oven control parts and gas control parts are separated and not mixed together, so
It is easy to repair and inspect.

As described above, according to the present invention, the high-pressure electric control parts of a microwave oven and the control parts of a gas oven can be placed next to each other without any safety problems, and a forced heat circulation gas The oven can be provided, and since only the outer case of either the microwave oven or the gas oven can be removed at the time of repair, it is highly safe and prevents accidental touching of parts other than the necessary parts.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a forced heat circulation type gas oven with microwave oven showing an embodiment of the present invention, Fig. 2 is an exploded perspective view of the same, and Fig. 3 is a partial perspective view of the same body with the side surface removed. Fig. 4 is the same right side view, Fig. 5 is the same right side view.
The figure is a sectional view taken along line A-A' in FIG. 57... Magnetron, 63... Gaskotok,
64... Gas governor, 65... Solenoid valve, 51...
Upper and lower partition plate, 67...Small hole group.

Claims (1)

[Scope of Claims] 1. Electric control parts for a microwave oven such as a magnetron and high-voltage transformer, and control parts for a gas oven such as a gas stove, a gas governor, and a solenoid valve, and the electric power of the microwave oven is controlled by a metal partition plate. The control parts and the control parts of the gas oven are vertically partitioned, and the electric control parts of the microwave oven are arranged on the upper part of the metal partition plate, and the gas control parts are arranged on the lower part. A forced heat circulation gas oven with a microwave oven that has an outer case that surrounds the gas oven and an outer case that surrounds the control parts of the gas oven. 2. A forced heat circulation gas oven with a microwave oven according to claim 1, wherein a group of small holes are provided in the outer case behind the control parts of the gas oven to provide an escape route for gas that does not pass through the electrical parts arrangement part.