JPS6115331B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION An object of the present invention is to provide a forced heat circulation 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, commercial power
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 heating power 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 transient voltage is about 10 KV immediately after starting operation.
Since high voltages are also generated, weak electrical 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 an electronics store to immediately provide services related to gas control parts and for a gas store to provide services related to electrical control parts, and it is necessary to solve this problem and improve the reliability and serviceability of the product.

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 provided approximately in the center of the back wall 5, a circulation inlet hole 7 is provided on both sides, and a circulation inlet hole 7 is provided upwardly. Exhaust 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; a combustion chamber 11, a suction chamber 12,
It has a fan storage 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 the partition wall 17, and the suction chamber 12 is formed so as to surround the circulation outlet 6.
A suction port 19 is provided opposite to the suction side of 8. Furthermore, both sides of the fan storage box 13 are provided with suction chambers 12.
A discharge system path extending to the outside of both sides and communicating with the circulation inflow hole 7 is configured. 21 is a motor that drives the fan 18; 22 is a cooling fan; these fans 18, the motor 21, and the storage chamber 1 which becomes the casing
3 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 screws.
6 indicates a thermal fluid regulation 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 stirrer 33 is connected to the upper blade 34 by a shaft 35 and is attached via a pin, so that wind is applied to the blade 34 and the stirrer is rotated.

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 advance 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 above the upper and lower partition plates 51, a hose end 62, a gas tank 63, a governor 64, a solenoid valve 65, etc. are installed at the bottom, and a small A group of holes 67 are drilled.

Furthermore, a sealing material 68 is provided around the flanges of the upper and lower partition plates 51.

The gas control unit 73 provided at the lower part of the partition plate 51 shown in FIG. 6 has a gas control unit 63, a gas governor 64, and solenoid valves 65A and 65B arranged in a line in this order and assembled into an arrangement stand 74. are integrated into one unit, and all parts can be installed and removed from the right side of the main body.

FIG. 4 is a right side view of the forced heat circulation type gas oven with microwave oven of this embodiment, and the right side plate of the body consists of a side plate A71 and a side plate B72, which are divided into upper and lower parts at the upper and lower partition plate 51. The louvers 69 are provided on the upper surface in the portion corresponding to the transformer and on the entire lower surface. FIG. 5 is a sectional view taken along line A-A' in FIG.
9 is shown in cross section.

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 from the small hole group 67 of the body back plate 55 and the louver 69, reducing the risk of gas explosion.Furthermore, the magnetron 37 and electrical control parts are cooled by a fan 56, and the fluid is discharged to the outside. This means that it prevents gas from entering into the electrical control parts.

Furthermore, by providing the gas control components at the bottom, heat rises upward due to the draft, so that the temperature of the gas control components 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.

Furthermore, the right side plates A71 and B7 cover the microwave oven control parts and gas control parts, respectively.
2 is divided into upper and lower parts by an upper and lower partition plate 51, and each part can be removed, so that it can be serviced without touching dangerous parts such as the high voltage transformer 52.

Furthermore, since the microwave oven control parts and the gas control parts are separated and not mixed together, services such as repair and inspection are easy.

Furthermore, the gas control parts are arranged vertically with the gas stock, gas governor, and solenoid valve to form one unit, which simplifies the gas piping and allows the gas control parts to be integrated into the microwave oven as a unit. The assembly process is easy, and the gas control parts unit is inspected for gas leaks, and the inspection is performed when the product is placed in a microwave oven, making the product even more reliable through double inspection. can be increased.

Furthermore, regarding servicing, all gas control parts can be easily installed and removed at once, improving serviceability.

As described above, according to the present invention, the high-voltage electric control parts of a microwave oven and the control parts of a gas oven can be placed next to each other without causing any safety problems.
It is possible to provide a forced heat circulation gas oven with a microwave oven, which has not been possible in the past. Moreover, since gas valve related parts are arranged in a row, gas piping is simple and maintenance is easy. Furthermore, the parts of the microwave oven and the parts of the gas oven can be easily inspected without moving the main body, and the safety against gas leakage is high.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal cross-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 part of the same body with side panels removed. FIG. 4 is a right side view of the same, FIG. 5 is a sectional view taken along line A-A' in FIG. 4, and FIG. 6 is a perspective view of the main parts. 57... Magnetron, 63... Gaskotok,
64...Gas governor, 65A, 65B...Solenoid valve, 70...Gas component arrangement stand.

Claims (1)

[Claims] 1 It has electrical parts of a microwave oven such as a magnetron and high-voltage transformer, and parts of a gas oven such as a gas cooker, governor, and solenoid valve, and the electrical parts of the microwave oven and the parts of the gas oven are separated by a metal partition plate. The electric parts of the microwave oven are placed on the top of the metal partition plate, the parts of the gas oven are placed on the bottom of the metal partition plate, and a gas cooker, a gas governor, and a solenoid valve are arranged in a line in this order on the metal plate. This is a forced heat circulation gas oven with a microwave oven that combines the parts of a gas oven into one unit.