JPS589682Y2 - gas compound cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a gas compound cooking device that uses high-frequency radio waves and combustion hot air.

In this type of cooker, it is desirable to improve the start-up characteristics of cooking using combustion hot air, and for this purpose a fan is provided to quickly circulate the hot air into the cooking chamber.

This fan sequentially exhausts the hot air inside the cooking chamber to the outside to smoothly suck in fresh hot air, and when cooking is performed using only high-frequency radio waves, it exhausts the moisture generated from the food to be cooked, and then closes the door. It is possible to prevent the window glass etc. from fogging up and to suppress the outflow of broth from the food to be cooked.

However, if indoor air is circulated by a fan during cooking using only high-frequency radio waves, the food to be cooked will be cooled down, resulting in a decrease in efficiency.

The present invention seeks to alleviate the above-mentioned drawbacks, and embodiments thereof will be described below with reference to the drawings.

1 is an enameled cooking chamber formed in the exterior 2; 3 is a combustion chamber for a gas burner 4 formed independently at the bottom of the cooking chamber 1; 5 is a radio wave irradiation chamber partitioned at the top of the cooking chamber 1; 6 is a A magnetron supplies high-frequency radio waves to the irradiation chamber 5, and 7 is a stirrer to make the radio wave mode uniform.

Reference numeral 8 denotes a centrifugal fan installed deep inside the cooking chamber 1, which sucks hot air (when the gas burner 4 is burning) or outdoor air (when the gas burner 4 is not burning) from the combustion chamber 3. The gas is circulated through the cooking chamber 1 and sequentially discharged to the outside through the exhaust port 9.

Next, the electric circuit will be explained based on FIG. 2. 10 is a power supply, 11.11' is a normally open door switch connected to both ends of the power supply 10, 12 is a fuse, and 13 is a door switch 1.
1.11' and reverse-acting normally closed safety switches, these are connected in series.

14 is a magnetron 6 connected to the rear stage of the door switch 11 and 11' via a first contact 15 of an oscillation relay, which will be described later.
16 is a combustion circuit of the gas burner 4 connected via a first contact 17 of a combustion relay to be described later.

Reference numeral 18 denotes a control circuit connected after the pair of door switches 11 and 11', which will be described in detail below.

First, an instant return type cooking switch 19 for one end of the power supply.
A parallel circuit is connected to the normally open self-holding contact 20 of the main relay, which will be described later, and an oscillation timer 22 and an oscillation relay 23 are connected to the connected rear end 21 via the first normally open contact 24 of the oscillation timer. , the combustion tanager 25 and the combustion relay 26 are connected via the first normally open contact 27 of the combustion timer.

Further, the oscillation timer 22 and the combustion timer 25 are connected through their respective second normally open contacts 28, 29, and the main relay 30 and the motor 31 that drives the fan 8 are connected between these two contacts 28, 29. Make a branch connection.

The motor 31 has a tap 32 for high speed rotation and a tap 33 for low speed rotation, which are switched by the combustion relay 26, but the low speed tap 33 is normally connected.

Thus, when the oscillation timer 22 and the combustion timer 25 are timed individually or simultaneously, their respective normally open contacts 24, 27, 28, 29 close, and when the cooking switch 19 is closed, the main relay 30 closes the self-holding contact 20. close.

At this time, when the combustion timer 25 is set, the tap of the motor 31 is switched to the high-speed tap 32 by the combustion relay 26, but when only the oscillation timer 22 is set, the tap remains on the low-speed tap 31.

Therefore, the fan 8 rotates at a low speed when the magnetron 6 is oscillated alone, and rotates at a high speed when the other gas burners 4 are ignited.

Therefore, the inventor made 2000 in the cooking room 1 with a constant atmosphere.
In order to raise the temperature of cc water by 10°C, the magnetron 6 was oscillated independently, and the fan 8 was rotated at high and low speeds at a frequency of 60, and the efficiency was compared in terms of the time required for each rotation.

As a result, the fan 8 was rotated at a high speed of 1600 r,
It has been found that the efficiency of high-frequency heating can be improved by about 5% by lowering the rotation speed from p, m to 1000 r, p, m, which is a low rotation speed.

In this way, the gas compound cooking device according to the present invention is equipped with a fan that constantly forcibly circulates the air inside the cooking chamber and exhausts part of it sequentially, and this fan is rotated at low speed when only high-frequency radio waves are supplied. Using only radio waves, it is possible to drain the moisture generated from the food to be cooked during heating and remove fogging from doors and windows, etc., and also to suppress the outflow of broth from the food to be cooked, and to avoid wasting the food to be cooked. Since no further cooling is required, a decrease in heating efficiency can be suppressed.

[Brief explanation of drawings]

FIG. 1 is a schematic configuration diagram of a gas composite cooker according to the present invention, and FIG. 2 is an electric circuit diagram. 1...Cooker, 4...Gas burner, 6
...Magnetron, 8...Fan, 3
1...Motor, 32...Tap for high speed, 33...Tap for low speed.

Claims (1)

[Scope of utility model registration request] High-frequency radio waves from a high-frequency oscillator and hot combustion air from a gas combustor are appropriately supplied to the cooking chamber, and the air in the cooking chamber is constantly forcibly circulated by a fan, and a portion of the air is sequentially exhausted. A gas compound cooker characterized by rotating at a low speed when only high-frequency radio waves are supplied.