JPS599827B2 - Refrigerator with thawing chamber - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to preventing a rise in the temperature of the load in the refrigerator in a refrigerator equipped with a thawing chamber using a high-frequency oscillator.

Conventionally, in refrigerators equipped with a thawing chamber using a high-frequency oscillator inside the refrigerator, when the thawing chamber is operated, a loss equivalent to the output of the high-frequency oscillator (approximately 50 factors) is generally lost as heat inside the refrigerator. It will be leaked.

Due to the amount of leaked heat, even during cooling operation, the internal load temperature increases and the load quality deteriorates.

Furthermore, if a defrosting operation is started while the defrosting chamber is in operation, or if the defrosting chamber is operated while the defrosting chamber is in operation, the load temperature inside the refrigerator will rise significantly and there is a problem that the refrigerator may become unusable depending on the storage load.

An object of the present invention is to provide a refrigerator-freezer with a thawing chamber that has a control system that solves the above-mentioned problems with the refrigerator-freezer with a thawing chamber and does not reduce storage load performance.

In order to achieve the above object, the present invention provides a control system in which the operation of the defrosting chamber and the defrosting of the evaporator that performs cooling are not performed at the same time.

Furthermore, when the thawing chamber is used, the refrigeration cycle can be operated continuously or intermittently as necessary, thereby making it possible to cool the inside of the refrigerator.

Hereinafter, the present invention will be explained by examples.

FIG. 1 is a circuit diagram showing one embodiment of the present invention, which is a control circuit that prevents the operation of the defrosting chamber and the defrosting operation at the same time in a refrigerator with a defrosting chamber.

Further, FIG. 2 shows a control circuit in which a means for forcibly operating the refrigeration cycle when the defrosting chamber is operated is added to the control circuit of FIG. 1.

In both figures, parts with the same function are indicated by the same reference numerals.

1 is a compressor whose operation is controlled by the operation of an internal thermostat 2;

3 is a defrosting device for energizing the compressor 1 and the defrosting heater 8 by integrating a certain time interval with a timer 3A and mechanically switching contacts 3B and 3C.

4 is a defrosting chamber operated by a switch 12; 5 is an electromagnetic relay that is excited by the switch and switches contacts 6 and 7; 9 is an electromagnetic relay that switches contacts 10 at the same time as the defrosting heater 8 is energized; 11 is a power plug It is.

Next, the operation of the embodiment will be explained.

As shown in FIG. 1, if the power plug 11 is energized, if the temperature detected by the internal thermostat 2 installed in the refrigerator-freezer is higher than the specified temperature, the two contacts are closed and the defrosting device 3 is activated. The compressor 1 is operated via the contact point 3B and enters a cooling state.

Further, the timer 3A in the defrosting device 3 is energized while the internal thermostat 2 is on, and integrates the time.

Therefore, when a certain prescribed time period is integrated, the contact 3B of the defrosting device 3 is switched to 30 by mechanical operation.

As a result, the defrosting heater 8 is energized, and the refrigeration cycle (
It is controlled so that the frost adhering to the evaporator in the evaporator (not shown) is thawed and the cooling operation is started after the defrosting is completed.

Therefore, when the switch 12 of the thawing chamber 4 is turned on during the cooling operation, the electromagnetic relay 5 is energized and operated to bring the contact 6 of 6A into contact and open the contact 7 of 7A, even if the switch 12 is released. Defrosting chamber 4 via self-exciting contact 6-6A
is energized, and the food is heated to a preset thawing temperature and thawed.

Here, 1OA of contact 10 is always in contact and opens only when excited by electromagnetic relay 9.
When 3C of the defrosting device 3 is not energized, the defrosting is possible.

Also, while the defrosting chamber 4 is operating, the electromagnetic relay 5 keeps the contact 7A open, so the timer 3A of the defrosting device 3 is not energized even when the internal thermostat 2 is on, so the defrosting operation is disabled. Not done.

Further, when the defrosting device 3 is performing defrosting operation by closing the contact 3C by the timer 3A, the electromagnetic relay 9 is energized and the contact 10A is open, so the switch 12 of the defrosting chamber 4 Even if the electromagnetic relay 5 is turned on,
Since it is not excited and at the same time the thawing chamber ↓ cannot be energized, the thawing operation is not performed.

Further, in the example shown in FIG. 2, the switch 12 of the defrosting chamber 4 is turned on during the cooling operation, the electromagnetic relay 5 is energized, contacts 6A of the contact 6, and 7A of the contact 7 is opened. 13A of contact 13 parallel to inner thermostat 2
It is also a control circuit that comes in contact with the

In this way, even if the two internal thermostats 2 are open, the compressor 1 is energized through the contacts 13-13A and is forced to operate, so that it can be kept in a cooling state during the defrosting operation.

As described above, according to the present invention, defrosting is not performed when the thawing chamber is activated, and since the thawing chamber is not activated during the defrosting operation, there is no risk of damage to the inside of the refrigerator that occurs when the thawing chamber is activated, especially during the defrosting operation. It is possible to prevent a significant rise in the internal load temperature due to heat leakage.

Furthermore, by adding a control circuit that operates the cooling cycle independently of the internal thermostat when the thawing chamber is activated, it is possible to further reduce the internal load temperature. It is possible to provide a refrigerator-freezer with a thawing chamber that does not reduce storage load quality and has the effect of improving storage performance.

[Brief explanation of the drawing]

FIG. 1 is a control circuit diagram showing one embodiment of the present invention, and FIG. 2 is a control circuit diagram showing another embodiment. 1: Compressor, 2: Internal thermostat, 3: Defrost device,
-4-12 thawing chamber, 5: Electromagnetic relay, 8: Defrost heater, 9
: Electromagnetic relay, 11: Power plug, 12: Switch.

Claims (1)

[Claims] 1. A refrigeration cycle is incorporated into a box made of a heat insulating material,
A refrigerator-freezer equipped with a freezer compartment and a refrigerator compartment is equipped with a thawing compartment that thaws frozen foods using a high-frequency oscillator, and is equipped with a control circuit that stops the defrosting operation of the evaporator that performs cooling while the thawing compartment is thawing. A refrigerator-freezer with a thawing chamber. 2. The refrigerator-freezer with a thawing chamber according to claim 1, characterized in that the thawing chamber has a control circuit that cuts off the power supply to the thawing chamber during a defrosting operation of the evaporator that cools the refrigerator-freezer. Freezer with refrigerator.