JPS6256433B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a forced ventilation method that includes a freezer compartment and a refrigerator compartment and circulates cold air inside the refrigerator using an electric blower.
The present invention relates to a rapid cooling device in a freezing chamber of a temperature-type refrigerator.

In conventional examples of this kind, it is common practice to continuously operate a compressor, an electric blower, etc. as a means of increasing the freezing speed. In particular, forced draft type two-temperature refrigerators have the disadvantage that during continuous operation, air also flows to the refrigerator compartment, reducing the amount of air flowing to the desired freezer 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, and the flow path to the refrigerator compartment cooler is changed. There are some examples of rapid freezing in the freezer compartment by shutting off the refrigeration system and flowing refrigerant intensively only to the freezer cooler, but in general, a forced draft method that uses one cooler as the cooling source is used. Such measures cannot be adopted for refrigerators.

The present invention eliminates such disadvantages and provides a rapid cooling device with an extremely simple configuration and at a low cost that can provide a forced draft type refrigerator with the same effect as a direct cooling type example. An embodiment of the present invention will be described below with reference to the accompanying drawings.

In the figure, 1 is a refrigerator main body, which is equipped with a compressor 2 at the bottom and a condenser 3 at the back.
Inside the main body 1 is an evaporator 4 and an electric blower 5 for forced ventilation.
The compartment wall 6 divides the compartment into two compartments: an upper freezer compartment 7 and a lower refrigerator compartment 8. 9 is freezer compartment 7
A thermostat placed in the freezer opens and closes depending on the temperature of the freezer compartment to control the operation of the compressor 2 and electric blower 5. 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. The damper thermostat 10 is provided with a temperature compensation heater 11 for compensating the operation of the damper thermostat. The cold air cooled by the evaporator 4 is forcedly circulated to the freezer compartment 7 and the refrigerator compartment 8 by the electric blower 5 as shown by the arrows in the figure.

Next, a schematic electrical circuit diagram of the refrigerator will be explained.
Reference numeral 12 denotes a switch used when rapidly freezing articles in the freezer compartment 7, and is provided at an arbitrary position such as the freezer compartment door 7'. Reference numeral 13 denotes a timer device which is activated when the switch 12 is closed and sets the rapid freezing time. This timer device 13 includes a relay 14 that switches a contact piece 14b from a normally closed contact 14b' to a normally open contact 14b'' by excitation of a coil 14a, and a switch 12.
A timer drive electric motor 15 is operated when the switch is closed, and opens the switch 12 after a certain period of operation.
It is composed of. The compressor 2 and the electric blower 5 are connected to the power supply via the thermostat 9 so as to be controlled by the thermostat 9, and the temperature compensation heater 11 is connected to the power supply via the thermostat 9 during normal operation.
The relay 14 is connected to a power source via a normally closed contact 14b'' so that it is energized regardless of whether the A circuit including the contact piece 14b of the relay 14, which is activated when the switch 12 is closed, and the normally open contact 14b'' is connected in parallel to the thermostat 9 so that the thermostat 9 is energized.

In such a configuration, when it is desired to quickly freeze the freezer compartment 7, the coil 14a of the relay 14 is energized by closing the switch 12, and the contact piece 14b is energized.
However, the normally closed contact 14b' is switched to the normally open contact 14b'', the thermostat 9 is short-circuited, the compressor 2 and the electric blower 5 are operated continuously, and at the same time, the energization to the temperature compensation heater 11 of the damper thermostat 10 is stopped. Then, the damper of the damper thermostat 10 is closed to stop the supply of cold air to the refrigerator compartment 8, and the cold air is intensively sent to the freezer compartment 7 to start rapid freezing.Then, the time set in the timer device 13 has elapsed. Then, as described above, the switch 12 is automatically opened by the timer drive motor 15.
The energization to the coil 14a is also stopped and the contact piece 14b also returns to its original state, so that the rapid freezing is canceled and the normal cooling operation state is restored.

FIG. 3 shows another embodiment of the present invention in which the relay 14 is not used as the timer device 13' and a switch 12' for quick freezing is incorporated in the timer device 13'. and a contact piece 12'' that switches the compressor 2 and electric blower 5 sides, and a contact piece 1 that makes the timer drive motor 15 energized and de-energized.
It is preferable to use a dual-circuit switch 12' with 2. Therefore, similarly to the embodiment shown in FIG. 2, the manually closed switch 12' is connected via a cam plate or the like in response to the rotation of the timer drive motor 15' after the set time of the timer device 13' has elapsed. Piece 12″, 12
to automatically open and cancel quick freezing.

As is clear from the above description, the present invention is provided with a switch that short-circuits the thermostat that controls normal cooling operation and at the same time stops power supply to the temperature compensation heater of the damper thermostat that controls the supply of cold air to the refrigerator compartment. Since this is used as a switch for quick freezing, the compressor and electric blower operate continuously while the switch is closed, and on the other hand, the cold air blowing to the refrigerator compartment is cut off, so there is no airflow to the freezer compartment. It is possible to perform rapid freezing efficiently by blowing cold air in a concentrated manner, and the forced ventilation method has an extremely simple configuration and is an inexpensive method that does not use expensive parts such as solenoid valves as in the case of the direct cooling method. It is possible to provide an efficient quick freezing method for refrigerator-freezers, and the practical effect is also high.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a refrigerator according to one embodiment of the present invention, and FIGS. 2 and 3 are schematic electrical circuit diagrams of different embodiments of the same refrigerator. 2... Compressor, 5... Electric blower, 9... Thermostat, 10... Damper thermostat, 11... Temperature compensation heater, 12, 12'... Switch.

Claims (1)

[Claims] 1. A freezer compartment and a refrigerator compartment, an electric blower that circulates cold air to each of these compartments, a thermostat that controls the operation of the compressor and the electric blower, and a damper thermostat that controls the amount of cold air to the refrigerator compartment.
A rapid cooling device for a refrigerator, comprising a temperature compensation heater for compensating the operating characteristics of the damper thermostat, and further comprising a switch for short-circuiting the thermostat and simultaneously stopping power supply to the temperature compensation heater.