JPS622522B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for cooking food by irradiating the food in the liquid with microwaves while the food is submerged in a high-temperature liquid.

An example of this type of apparatus is a microwave frying apparatus that fries food by irradiating the food submerged in high-temperature oil with microwaves while the food is submerged in hot oil. Therefore, in such a frying device, the finished state of the fried food largely depends on the length of time the food is immersed in the high-temperature oil and the length of time the food is irradiated with microwaves. On the other hand, since microwaves are used, immersion of food in oil and microwave irradiation must be carried out in a sealed heating chamber with no microwave leakage. Therefore, in this case, it would be good to be able to provide a frying device that can automatically immerse the food in high-temperature oil for any length of time in a sealed heating chamber and also perform microwave irradiation for any length of time.

The present invention will be explained below with reference to Examples.

FIG. 1 shows the internal structure of the device of this embodiment. The opening of the heating chamber 1 is sealed by a door 2, and microwaves are supplied from a magnetron M through a power supply port 3 at the top of the chamber. An oil tank for storing edible oil 5 is provided in the lower part of the heating chamber 1, and a meandering heater H is disposed near the bottom of the oil tank. A metal mesh basket-shaped food holder 7 is installed so that it can be raised and lowered with respect to the oil surface of the oil tank by a lifting means 8, and the food placed in the food holder 7 is placed in the raised position of the holder 7. It is placed above the oil level and sinks below the oil level in the lowered position. The elevating means 8 has a well-known structure consisting of a drive motor CM, a gear 10 fixed to the motor shaft, and a toothed rod 11 that engages with the gear and moves up and down. A support rod 12 for support is connected. The detection body LS consisting of a limit switch is fixedly installed below the tooth rod, and as shown in the figure, at the lowered position of the food carrier 7,
It is pressed by the lower end of tooth rod 11 and turns on.

FIG. 2 shows the front configuration of the above device. An operation panel 14 is arranged in parallel with the door 2, and is provided with a power switch SW ₁ , a start switch SSW, a first timer knob TMN ₁ , a second timer knob TMN ₂ , and a temperature control knob THN. To briefly explain these operations and the operation of the device, the power switch SW ₁ is turned on in the standby state, which energizes the heater H and controls the cooking oil 5 at the temperature control knob.
It is heated and maintained at the temperature set by THN. Next, place the food on the food holder 7, set the desired microwave irradiation time length with the first timer knob TMN ₁ , and set the desired length of immersion time of the food in oil with the second timer knob TMN ₂ . Set. Finally, if you operate the start switch SSW, the food placement body 7
is lowered and the food is submerged in oil, then microwave irradiation is performed for the length of time set by the first timer knob TMN ₁ , and after microwave heating is completed, the food is irradiated for the length of time set by the second timer knob (TMN ₂ ). After the time elapses, the food mounting body 7 rises, the food leaves the oil tank, and frying is completed. Such operation will become clearer in the following description of FIGS. 3 and 4.

FIG. 3 shows the electric circuit of the above embodiment device, and the fourth
The figure shows a time chart of the operation.

Power terminals T ₁ and T ₂ are connected to the commercial power supply,
Therefore, when the power switch _SW1 is turned on, the heater H is energized via the bimetallic temperature switch THS. The operating point of the temperature switch THS is adjusted by the temperature control knob THN, so that the temperature of the cooking oil in the oil tank is maintained at the temperature set by the temperature control knob THN. On the other hand, power switch SW ₁
When the magnetron M is turned on, the blow motor BM which cools the magnetron M is energized, and the drive motor CM is also energized via the first normally closed contact RC _1a . drive motor
When the CM is energized, it raises the toothed rod 11, thus holding the food carrier 7 in the upper position.

In this state, after placing the food on the food placing body 7 and closing the door 2, the first and second timer knobs TMN ₁ ,
Set TMN ₂ to desired values. The door 2 is closed by turning the door switch SW ₂ ON, and the first timer knob TMN ₁ is set by turning the normally open contact TC _1a and the normally closed contact TC _1b of the first timer ON and OFF, respectively. Also, when the second timer knob TMN ₂ is set, the second timer contact TC ₂ is turned ON.

Therefore, when the start switch SSW is operated, the first relay coil RL ₁ is energized via the switch and the second timer contact TC ₂ . At this time, the first relay coil RL ₁ turns on the first normally open contact RC _1b .
However, since this contact is connected in parallel with the start switch SSW, even if the operation of the start switch SSW is stopped, the energization to the first relay coil RL ₁ is self-maintained through the first normally open contact RC _1b . be done.

The first relay coil RL ₁ is the first normally closed contact at the same time.
RC _1a is turned OFF, and therefore the energization of the drive motor CM is stopped, and the food carrier 7 immediately begins to descend due to its own weight, eventually reaching a predetermined lowering position. Under such conditions, the food sinks into the hot oil and the detection element LS turns on.
becomes. The sensing object LS in the ON state is connected to the first timer motor TM ₁ through a path including the first normally open contact RC _1b in the ON state.
At the same time, the second relay coil RL ₂ is also energized via the first timer normally open contact TC _1b which is in the ON state. At this time, the second relay coil RL ₂
The normally open contact RC ₂ is turned ON, and power is supplied to the high voltage transformer HT of the magnetron power supply circuit through this contact.

Therefore, from the moment the food is submerged in the oil, frying with high-temperature oil and heating with microwaves begin simultaneously, and the first timer motor TM ₁ that determines the length of microwave irradiation is started and its timing operation is started. is started.

When the first timer times up, the normally open contact TC _1a and normally closed contact TC _1b of the first timer turn OFF and ON, respectively.
When this happens, the second relay coil RL ₂ is no longer energized and the supply of microwaves is stopped, and at the same time the second timer motor TM ₂ is started and its timing operation is started.

After that, when the second timer times up and the second timer contact TC ₂ turns OFF, the first relay coil RL ₁ is de-energized, so the first normally closed contact RC _1a and the first normally open contact RC _1b turn ON and OFF, respectively. It becomes OFF,
The drive motor CM is immediately re-energized and the food placement body 7 is raised. The food is then removed from the oil bath, the frying process using the high temperature oil is completed, and the frying process including microwave heating is completed.

In the above embodiments, the microwave output was constant, but the output may be selectable using well-known techniques.

As is clear from the above description, according to the present invention, in the case of a microwave frying device, food can be immersed in high-temperature oil automatically and for any length of time in a sealed heating chamber, and microwave irradiation can also be performed arbitrarily. It can be done for a long time.

In addition, after detecting the lowered position of the food placing body that automatically immerses the food in the high-temperature oil, a timer is activated to determine the microwave irradiation time length, and after the microwave irradiation is finished, the timer is activated. Since the second timer is started to measure the remaining time of immersion of the food in the high temperature oil, it is possible to more accurately measure the time of immersion of the food in the oil, and the second timer can be used to measure the remaining time of immersion of the food in the oil. A long timer can be used.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, in which FIG. 1A is a sectional view seen from the front, FIG. 1B is a sectional view seen from the side,
Figure 2 is a front view, Figure 3 is an electrical circuit diagram, and Figure 4 is a time chart. 5...Edible oil, 7...Food placement body, 8...Elevating means, _TM1 ...First timer motor, _TM2 ...Second timer motor.

Claims (1)

[Claims] 1. In a microwave cooking device in which the lower part of the microwave heating chamber is a liquid tank, a food mounting body placed in the heating chamber, and a lifting means for raising and lowering the food mounting body with respect to the liquid level of the liquid tank. , a first timer for setting the length of time for supplying the microwave to the heating chamber;
A second timer for setting the length of time for which the food placing body is immersed in the liquid by the lifting means; a detection body for detecting that the lifting means has lowered the food placing body; and a detection unit that is linked to the time-up of the first timer. A microwave cooking apparatus characterized in that the first timer is started based on the detection of the object, and the second timer is started based on the operation of the interlocking switch.