JPS60251379A - Refrigerator with high-frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerator equipped with a high-frequency heating device for defrosting frozen foods.

Conventional configuration and its problems Frozen foods are being used more frequently in households, and many refrigerator-freezers are being used. Additionally, with the addition of quick freezing functions to refrigerators, home free ranges are also becoming more popular.

However, when it comes to thawing frozen foods, natural thawing (
thawing when left in the water), thawing in water (thawing when left in water).

Thawing has been done using a microwave oven, but these methods have not been satisfactory in terms of thawing time and thawing quality.

Therefore, various refrigerators with high-frequency heating devices have been proposed that enable rapid defrosting by installing a high-frequency heating device inside the refrigerator.

Conventional refrigerators with high-frequency heating devices operate the high-frequency generator continuously during thawing to continuously irradiate frozen foods with microwaves. However, microwaves have a characteristic that their strength attenuates as they penetrate into food, and in ordinary food it attenuates by a factor of 5, which is about 37 times. Therefore, in the case of thick foods, there may be a large temperature difference between the surface and the inside, resulting in uneven thawing, which is a problem that has not yet been commercialized.

OBJECTS OF THE INVENTION An object of the present invention is to provide a refrigerator equipped with a high-frequency heating device that is free from uneven defrosting.

Structure of the Invention In order to achieve this object, the present invention operates a high frequency generator intermittently using a timer.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4. A refrigerator 1 has a refrigerator compartment 2 and a freezer compartment 3, and a thawing compartment 4 for frozen foods is installed in the refrigerator compartment 2. Microwaves are supplied to the defrosting chamber 4 from a high frequency generator 5 installed in a machine room at the bottom of the refrigerator 1 through a waveguide 6 which is a transmission line. A microwave scattering stirrer fan 7 made of metal scatters the microwave guided by the waveguide 6 into the thawing chamber 4 . 8
is the starr fan motor. As a result, the frozen food 9 in the thawing chamber 4 is thawed.

Next, the thawing chamber 4 is composed of an outer box 10 made of a metal plate that reflects radio waves, and an inner box 11 made of synthetic resin. Further, a metal plate 12 for reflecting radio waves is attached to the inside of the front surface of the inner box 11.

Next, an electric circuit diagram of a refrigerator with a high-frequency heating device will be explained. 13 is the electric circuit of the refrigerator.

An electric circuit 13 of this refrigerator is connected to a commercial AC power source 14 and an internal temperature regulator 1 that closes when the internal temperature falls below a predetermined temperature.
5 and a compressor 20 is connected via an MR synchronizer 16, which will be described later. Further, 16 is an MR reshinro for switching and controlling cooling operation and defrosting operation, and its normally open contact a is connected to a defrosting heater 19.
A compressor 2o is connected to the normally closed contact point. Next, the high frequency generation circuit 21 will be described. 22 is a manual defrosting switch. A timer 23 includes an ON-0FF switch 24 and a time switch 26. still,
When the defrosting time is set with the time switch 25, the timer 23 intermittently turns the switch 24 to zero during the set time.
It is to be turned off.

Next, the operation of the refrigerator with the high-frequency heating device will be explained according to the timing chart shown in FIG. 4. When the defrosting time is set with the time switch 25 and the defrosting switch 22 is turned on, the switch 24 is turned ON-OFF at a constant cycle. Therefore, since the star motor 8 and the high frequency generator 5 are intermittently energized, microwaves are intermittently transmitted to the thawing chamber 4 through the waveguide 6.
The frozen food 9 inside is irradiated. Then, when the defrosting time set by the time switch 25 ends, the energization to the star motor 8 and the high frequency generator is stopped.

In other words, since the microwave is intermittently irradiated to the frozen food 9 at a fixed cycle, even if uneven thawing occurs in the frozen food 9 due to a difference in penetration or uneven irradiation during the microwave irradiation time, the Since the temperature of frozen food becomes uniform, uneven thawing can be prevented and the quality of thawing can be improved.

Effects of the Invention As is clear from the above description, the present invention includes a thawing chamber provided inside a refrigerator, a high frequency generator for heating the thawing chamber provided outside the refrigerator, and a high frequency generator for setting a thawing time and generating a high frequency wave during the thawing time. Since the generator is configured with a timer that operates the generator intermittently, when the high-frequency generator is stopped, heat transfer occurs inside the frozen food, preventing thawing bugs and improving thawing quality.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a refrigerator which is an embodiment of the present invention;
The figure is a sectional view of the thawing chamber shown in FIG. 1, FIG. 3 is an electric circuit diagram shown in FIG. 1, and FIG. 4 is a partial time chart diagram of FIG. 3. 2...Refrigerating room, 4...Defrosting room, 6...
...High frequency generator, 23...Timer. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 Figure 3 Figure 6 Figure 4 Temporary r4

Claims (1)

[Claims] A refrigerator equipped with a high-frequency heating device, which includes a thawing chamber provided in a refrigerator compartment, a high-frequency generator provided outside the refrigerator compartment for heating the thawing chamber, and a timer that sets a thawing time and operates the high-frequency generator intermittently during the thawing time.