JPS58133583A - Quick cooling device for refrigerator - 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 The present invention relates to a rapid cooling device for the freezer compartment of a forced draft two-temperature refrigerator that includes a freezer compartment and a refrigerator compartment and circulates cold air inside the refrigerator compartment using an electric blower.

In conventional examples of this type, it is common practice to continuously operate a compressor, an electric blower, etc. as a means of increasing the freezing rate. In particular, forced draft type two-temperature refrigerators have the disadvantage that during continuous operation, air also flows to the cooling compartment, reducing the amount of air flowing to the desired freezing compartment, resulting in poor refrigeration efficiency. Recently, the freezer room.

In direct cooling type refrigerators in which each refrigerator compartment is equipped with a dedicated cooler, in order to eliminate the above-mentioned disadvantages, a solenoid valve is installed in the cooling system to switch the refrigerant flow path to the freezer compartment cooler. There are some examples of rapid freezing in the freezer compartment by blocking the flow path and allowing the refrigerant to flow intensively only to the freezer compartment cooler, but in general, forced draft methods that use one cooler as the cooling source are used. If you have a refrigerator, you cannot use such a method.

The present invention eliminates such disadvantages and provides a rapid cooling device for a forced draft refrigerator with an extremely simple configuration and at a low cost that has the same effect as a direct cooling method, and also This provides a refrigerating system that takes into account the temperature rise in the refrigerating compartment. An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is the refrigerator main body, a compressor 2 at the bottom,
Each is equipped with a condenser 3 on the back.

The interior of the main body 1 is divided into two compartments, an upper freezer compartment 7 and a lower refrigerator compartment 8, by a partition wall 6 having an evaporator 4 and an electric blower 6 for forced ventilation. Reference numeral 9 denotes a freezer thermostand placed in the freezer compartment 7, which opens and closes according to the vortex layer of the freezer compartment, and connects the compressor 2,
``It controls the operation of the electric blower 6. Reference numeral 10 denotes a damper thermostat disposed at the cold air outlet of the refrigerator compartment 8, which controls opening and closing of the damper according to the temperature of the refrigerator compartment, thereby maintaining the temperature of the refrigerator compartment at a desired temperature. This damper thermostat 1o is provided with a temperature compensation heater 11 that compensates for the operation of this damper thermostat. Then the freezer compartment 7. Cold air cooled by the evaporator 4 is forcedly circulated into the refrigerator compartment 8 by an electric blower 5 as shown by the arrow in the figure.

Next, the above-mentioned refrigeration side vapor circuit diagram will be explained.

Reference numeral 12 denotes a bimetal switch for manual closing and automatic opening, which has a temperature-sensing part installed in a part of the freezer compartment 7. After manual closing, the freezer compartment 7
The contacts are configured to automatically open when the temperature has cooled to a predetermined temperature. Reference numeral 13 denotes a switching relay in which a contact attracting coil 13a is connected in series with the bimetal switch 12, and a normally closed circuit A in which the switching contact 13b is normally closed and the vortex layer compensation heater 11 of the damper thermostat 10 is always energized. During operation, the switching contact 13b is opened to stop energization to the temperature compensation heater 11 and constitute a short circuit B that short-circuits the freezer compartment thermostat 9. Reference numeral 14 denotes a refrigerator thermostat provided in a part of the refrigerator compartment 8, which is normally closed while the bimetal switch 12 is closed, and which connects the bimetal switch 12 and the switching relay 13 to a contact attracting coil 13a. When the temperature of the normally closed contact 14a and the refrigerator compartment 8, which form a circuit that is energized in series, reaches a predetermined temperature, the contact is opened and the energization to the contact suction coil 13a of the switching relay 13 is interrupted. The second short circuit Bt that shorts the thermostand 9 has a normally open contact 14b that maintains the short circuit.

In such a configuration, when it is desired to quickly freeze food, etc. in the freezer compartment 7, the contact suction coil 13 of the switching relay 13 is closed by manually closing the bimetal switch 12.
normally closed circuit A, the switching contact 13b is attracted, and the normally closed circuit A
is opened, short circuit B is closed, and freezer compartment thermostat 9
The compressor 2 and the electric blower 5 are operated continuously, and at the same time, the power supply to the temperature compensation heater 11 of the damper thermostat 1o is stopped, and the damper thermostat 1
o is released from the heat retention state, the damper is automatically closed, and the supply of cold air to the refrigerator compartment 8 is substantially stopped. Therefore, the cold air forcibly ventilated by the electric blower 6 is intensively and continuously sent almost exclusively to the freezer compartment 7 to start rapid freezing.

After that, when the inside of the freezer compartment 7 is cooled to a sufficiently low temperature and the temperature sensing part of the bimetal switch 12 installed in a part of the freezer compartment 7 reaches a predetermined set temperature, the contacts of the bimetal switch 12 are automatically opened. Then, the energization to the contact attracting coil 13a of the switching fIJ relay 13 is also stopped, the switching contact 13b returns to its original state, and the quick freezing is canceled. Furthermore, while the bimetal switch 12 is closed, that is, during rapid freezing, the supply of cold air to the refrigerator compartment 8 is almost stopped, so the temperature inside the refrigerator compartment 8 gradually rises, but the rapid freezing time is prolonged. When the temperature of the refrigerator compartment rises too much and reaches a predetermined temperature, the contact of the refrigerator thermostat 14 that detects this changes to the normally open contact 14b side, and the energization to the contact attraction coil 13a of the switching relay 13 is interrupted. The switching contact 13b is forcibly returned to 4 to resume energization to the temperature compensation heater 11 of the damper thermostat 1o, but at this time, the short circuit state of the freezer compartment thermostat 9 is maintained by the second short circuit B', and the compressor 2 The electric blower 6 continues to operate continuously, and at the same time sends cold air to the freezer compartment 7, cold air is also continuously sent into the refrigerator compartment 8 by opening the damper, and the refrigerator compartment 8 is rapidly cooled and the temperature rises. The condition is canceled.

When the inside of the refrigerator compartment 8 reaches a predetermined low temperature, the contact is again switched to the normally closed contact 14a side, and energization to the suction coil 13a of the switching relay 13 is resumed, and normal quick freezing of the freezer compartment 7 is resumed.

As is clear from the above configuration, the present invention manually closes the freezer compartment thermostat to short-circuit the compressor.

At the same time as the electric blower is operated continuously, a switch is installed that stops the power supply to the temperature compensation heater of the damper thermostat that controls the amount of cold air to the refrigerator compartment, and centrally blows cold air only to the freezer compartment.This switch is used for quick freezing. This switch is equipped with a temperature-sensing section inside the freezer compartment to automatically release quick freezing.It has the effect of quickly and efficiently freezing the freezer compartment, and has a correlation with the completion of quick freezing. Since rapid freezing is automatically terminated and released by detecting the internal temperature, there is no need to continue rapid freezing for longer than necessary. In addition, a refrigerator thermostat is installed in the refrigerator compartment to prevent excessive temperature rises, and if the degree of refrigeration rises too much during quick freezing, quick freezing is temporarily interrupted, the refrigerator temperature is lowered, and then quick freezing is resumed automatically. Since it can be restarted in
There is no need to worry about the temperature in the refrigerator room rising too much due to prolonged quick freezing, which will adversely affect the food, etc. in the refrigerator room.

In addition, it is possible to provide an efficient and extremely rapid freezing method to a forced ventilation refrigerator-freezer while safely preserving food in a refrigerator with an extremely simple configuration and means, and the present invention has high practical effects.

[Brief explanation of drawings]

FIG. 1 is a schematic sectional view of a refrigerated acid according to an embodiment of the present invention, and FIG. 2 is a schematic electrical circuit diagram of the same refrigerated acid. 2...Compressor, 5...Electric blower, 9
...Freezer thermostat, 10...0 Damper thermostat, 11 e... Temperature compensation heater, 12... Bimetal switch (switch)
, 14... Refrigerator room thermostat.

Claims (1)

[Claims] A freezer compartment and a refrigerator compartment, an electric blower that circulates cold air to each of these compartments, a freezer thermostat that controls the operation of the compressor and the electric blower, a damper thermostat that controls the amount of cold air to the refrigerator compartment, and the damper. A temperature compensation heater that compensates for the operating characteristics of the thermostat, a manual close/automatic open switch that responds to a temperature-sensing section in the freezer compartment, and a refrigerator thermostat that switches contacts by sensing the temperature inside the cold storage compartment. and when the switch is closed,
Short-circuiting the freezer compartment thermostat and stopping power supply to the temperature compensation heater, and when the refrigerator compartment temperature rises to a predetermined temperature and the refrigerator compartment thermostat is activated while the switch is closed, the temperature compensation heater is activated. A rapid cooling device for a refrigerator configured to restart electricity supply.