JPS62172177A - Refrigerator with thawing room - 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 technology for a refrigerator with a thawing chamber that defrosts food using a heat source.

2. Description of the Related Art In recent years, frozen foods have become more frequently used in households, and many refrigerator-freezers have been used. Frozen foods or foods frozen at home must be thawed and cooked in some way. There are various methods of defrosting, but microwave ovens are often used because they can defrost food quickly, and recently refrigerators are being developed that have a defrosting chamber inside them that defrosts food using a heat source such as high frequency.

An example of the conventional refrigerator with a defrosting chamber mentioned above will be described below with reference to the drawings.

FIGS. 3 and 4 show a sectional view and an electric circuit diagram of a conventional refrigerator with a defrosting chamber. In FIG. 3 and FIG. 4, 1 is a refrigerator main body. 2 is a compressor that compresses the refrigerant in the refrigeration cycle. A condenser 3 condenses the refrigerant compressed by the compressor 2 at a predetermined temperature. An evaporator 4 evaporates the refrigerant liquefied in the condenser 3 at a predetermined temperature. 6 is an electric blower that blows cold air from the evaporator 4 into the refrigerator. 6
The freezer compartment 7 is a refrigerator compartment. 8 is a heat source (hereinafter referred to as a magnetron) consisting of a magnetron, 09 is a magnet that oscillates a predetermined high frequency, and 09 is a waveguide that guides the high frequency radio waves generated by the i/8 to the thawing chamber 10.

10 is a thawing chamber provided within the refrigerator compartment 7.

Reference numeral 11 denotes a timer for controlling the operation time of the magnetron 8 for thawing time in the thawing chamber 10. Reference numeral 12 denotes a thermostat provided in the freezer compartment, which controls the temperature of the freezer compartment 6 by turning the compressor 2 and the electric blower 5 ON and OFF. Reference numeral 13 denotes a damper thermostat provided in the refrigerator compartment T, which controls the temperature of the refrigerator compartment 6 and the thawing compartment 1o by controlling the air volume. 14 is a timer motor within the timer 11; 15 is a switch that operates in conjunction with the timer motor 14 to perform ON/OFF control of the magnetron 8; and 016 is a defrosting operation switch.

The operation of the refrigerator with a defrosting chamber configured as above will be explained below.

Compressor 2. Condenser 3. A refrigeration cycle constituted by an evaporator 4 and an electric blower 5. Thermostat 12. Damper thermostat 13, freezer compartment 6. Refrigerator room7. The thawing chamber 10 is cooled to a predetermined temperature. When thawing frozen food, place the food in the thawing chamber 1o and set the timer to 1.
1 to a time appropriate for the food, and turning on the thawing operation switch 16, the food is thawed using high-frequency radio waves guided from the magnetron 8 to the thawing chamber 10 by the waveguide 9, and the timer motor 14 starts to defrost the food after the set time has elapsed. , the interlocked switch 16, and the defrosting operation switch 16 are set to 0FFj, and defrosting ends.

Problems to be Solved by the Invention However, with the above configuration, depending on the time that the timer 110 is set, more thawing may be performed than necessary, which may lead to an abnormal rise in the temperature of the object to be thawed. If an abnormal rise in the temperature of the food to be thawed occurs, moisture evaporating from the food will cause abnormal frost formation on the evaporator 4, and heat will be affected on the outside of the thawing chamber, making it impossible to maintain an appropriate temperature inside the chamber. It had some problems.

In view of the above-mentioned problems, the present invention provides a refrigerator with a thawing chamber that prevents abnormal frost formation on the evaporator due to excessive rise of objects to be thawed and heat influence on the surroundings outside the thawing chamber. Means for Solving the above-mentioned problems, the refrigerator with a thawing chamber of the present invention includes a timer that controls the thawing time in the thawing chamber, and a timer that detects the temperature inside the thawing chamber and shuts down the thawing chamber when the temperature reaches a predetermined temperature or higher. The present invention is equipped with a temperature sensor that terminates the operation of the thawing chamber with priority over the timer, and a control means that operates the cooling system at the same time as the operation of the temperature sensor. While the timer that controls the thawing time is operating, if the temperature of the item to be thawed rises and the temperature inside the thawing chamber reaches a predetermined level, the temperature sensor will give priority to the thawing chamber operation and end it over the timer. Before the material to be thawed rises abnormally, turn off the power to the magnet and operate the cooling system.
This prevents abnormal frost formation on the evaporator due to excessive rise of the material to be thawed and thermal influence on the surroundings outside the thawing chamber.

EXAMPLE Hereinafter, a refrigerator with a defrosting chamber according to an example of the present invention will be described with reference to the drawings. Note that the same configurations as those of the prior art are given the same numbers and detailed explanation thereof will be omitted.

FIG. 1 shows a cross section of a refrigerator with a defrosting chamber according to the present invention, and FIG. 2 shows its electric circuit.

In FIG. 1, 17 is a temperature sensor provided in the thawing chamber 1o.

Next, in FIG. 2 showing the electric circuit, 12 is a thermo stand, compressor 2. It controls ◯N-0FF of the electric blower 6, and consists of a switch section 12a and a coil 12b. The thermostat 12 detects and controls the temperature of the freezer compartment 6 when thawing is not being performed, but when the coil 12b is energized, the switch part 12a is forcibly closed and normal operation is performed thereafter. ing. 16
is a defrosting operation switch, which includes a switch 16a that operates the timer motor and a switch 16b connected to the coil 12b.
Therefore, the switch 16a and the switch 16b are interlocked. 17 is a temperature sensor, and when the temperature inside the defrosting chamber is lower than a predetermined temperature, contacts 17a and 17c are closed, and when the temperature becomes higher, contacts 17a and 1 are closed. At the same time, the control means for operating the cooling system is such that when the contacts 17a and 1b of the temperature sensor 17 are closed, the coil 12b of the thermostat 12 is energized to forcibly close the switch section 12a.

The operation of the refrigerator with a defrosting chamber configured as described above will be described below with reference to FIGS. 1 and 2.

When defrosting frozen food, when the appropriate defrosting time for the food is set in the timer 11, the temperature sensor 17 in the defrosting chamber 10 maintains a predetermined temperature or lower, and contacts 1a and 17c are closed. After a predetermined period of time, the timer motor 14
Open the linked switch 15 and set the magnetron 8 to 0F.
FI, and the defrosting operation switch 16 interlocked with the timer motor 14 is also set to FF.

Next, a case where the timer 11 is set longer than necessary will be explained. By turning on the defrosting operation switch 16, the timer motor 14 operates and the switch 16 interlocked with the timer motor 14 is closed.

At this time, since the inside of the thawing chamber 10 is properly cooled and the temperature is below the predetermined temperature, the temperature sensor 1a detects the contact 17a and the contact 1.
The end C is in the closed state, and the magnetron 8 is activated. Then, thawing is performed, and the material to be thawed passes the appropriate thawing state,
When the temperature inside the thawing chamber 10 rises and reaches a predetermined temperature or higher,
Contacts 17a and 17c of temperature detector 17 are opened,
Contact 17a and contact 17b are closed 0. In other words, even while the timer motor 14 is operating, the temperature detector 17 installed in the thawing chamber detects an abnormal temperature of the object to be thawed and stops the operation of the magnetron 8 to stop thawing. At the same time, the contacts 17a and 17b are closed, and the coil 12b is energized. Therefore, the thermostat 12 is closed, the compressor 2 and the electric blower 6 are operated to perform a cooling operation, and the cold air from the evaporator 4 passes through the damper thermostat 13, is led to the thawing chamber 10, and is cooled to a predetermined temperature.

Incidentally, after the coil 12b is energized and the thermostat 12 is forcibly closed, the normal thermostat operation is performed.

As described above, according to this embodiment, there is a timer that controls the thawing time in the thawing chamber, and a timer that detects the temperature in the thawing chamber and, when the temperature in the thawing chamber reaches a predetermined temperature or higher, gives priority to the operation of the thawing chamber over the timer. Since it is equipped with a temperature sensor for terminating the defrosting process and a control means for activating the cooling system at the same time as the temperature sensor is activated, it prevents abnormal frost formation on the evaporator due to excessive rise in the temperature of the thawing material and the surrounding area outside the thawing room. can prevent thermal effects. In the embodiment, a magnetron was used as the heat source, but the same effect can be obtained even if a heater is used.

Effects of the Invention As described above, the present invention includes a timer that controls the thawing time in the thawing chamber, and a system that detects the temperature inside the thawing chamber and, when the temperature reaches a predetermined temperature or higher, gives priority to the operation of the thawing chamber over the timer. By providing a temperature sensor for terminating the defrosting process and a control means for activating the cooling system at the same time as the temperature sensor is activated, it is possible to prevent abnormal frost formation on the evaporator due to excessive rise in the material to be thawed and thermal effects on the surroundings outside the thawing room. It can be prevented.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a refrigerator with a defrosting chamber according to an embodiment of the present invention, Fig. 2 is an electrical circuit diagram of the main part of Fig. The figure is an electrical circuit diagram of the main parts of a conventional refrigerator with a defrosting chamber. 7...Refrigerating room, 1o...Thawing room, 11
...Timer, 17...Temperature detector. Name of agent: Patent attorney Toshio Nakao and 1 other person17
- Temperature clamping device Fig. 2 II--Gwimar/'/--Temperature clamping device Fig. 3 Fig. 4

Claims (1)

[Claims] a refrigerator compartment; a thawing compartment for defrosting using a heat source within the refrigerator compartment; a timer for controlling defrosting time in the defrosting compartment; and detecting the temperature in the defrosting compartment when the temperature reaches a predetermined temperature or higher;
A refrigerator with a thawing chamber, comprising: a temperature sensor that terminates the operation of the thawing chamber with priority over the timer; and a control means that operates a cooling system simultaneously with the operation of the temperature sensor.