JPS58142178A - 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 service device VC in the freezer compartment of a two-temperature refrigerator with a forced draft system that includes a freezer compartment and a refrigerator compartment and circulates cold air inside the refrigerator using an electric blower.

Conventionally, as a means to increase the freezing speed, it has been common practice to continuously operate a compressor, an electric blower, etc., but it is customary to continuously operate a compressor, an electric blower, etc. During operation, wind also flows into the refrigerator compartment.1. Since the amount of air flowing to the desired freezer compartment side is reduced, there is a disadvantage that the refrigeration efficiency is poor. Recently, in direct cooling type refrigerators in which the freezer compartment and the refrigerator compartment are each equipped with a dedicated cooler, an electromagnetic filter for switching the refrigerant flow path has been installed in the cooling system to solve the above-mentioned disadvantages. One method is to cut off the flow path to the storage room cooling device and concentrate the refrigerant flow only to the refrigerant room cooler. Forced ventilation type with one cooler as the cooling source.

Such measures cannot be adopted for refrigerators.

The present invention eliminates such disadvantages and provides an efficient rapid cooling device for a forced draft refrigerator with an extremely simple configuration.
In addition, the objective is to provide a product that is inexpensive, prevents the temperature of the refrigerator compartment from rising during quick freezing, and can provide a reliable quick freezing time.

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 freezing compartment 7 and a lower refrigerating compartment 8, by a partition wall eVC having an evaporator 4 and an electric blower 5 for forced ventilation. Reference numeral 9 denotes a freezer thermostat placed in the freezer compartment 7, which opens and closes depending on the temperature of the freezer compartment and operates the compressor 2,
It controls the electric blower 6. 10 beg i cold room 8
A damper thermostat placed at the cold air outlet of the refrigerator opens and closes 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 10 is provided with a temperature compensation heater 11 that compensates for the operation of this 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. On the other hand, 12 is a quick cooling switch (switch) provided on the freezer compartment door etc. for quickly freezing the freezer compartment 7;
3 is a quenching time timer, and after opening the quenching switch 12,
When the quenching time timer 13 has accumulated a predetermined time, the quenching switch 12 is automatically opened and returned via a cam plate or the like that responds to the rotation of a timer motor (not shown). 14 is an electromagnetic relay for rapid freezing switching, which includes a coil 14a for contact attraction and two switching contacts 14b, 14b.
When the coil 14a is energized, one contact 14b short-circuits the freezer compartment thermostand 9 described in 111, and the other contact 14b' simultaneously stops the energization to the temperature compensation heater 11 and simultaneously performs rapid cooling as described later. The timer 13 is energized.

Reference numeral 15 denotes a refrigerator thermostat installed in a part of the refrigerator compartment 8, which normally has a normally closed contact i5a forming a circuit that is energized in series to the contact attracting coil 14a of the electromagnetic relay 14.
and a normally open contact 16b which opens when the temperature of the refrigerator compartment 8 rises to a predetermined temperature and interrupts the energization to the contact suction coil 14a but short-circuits the freezer compartment thermostat 9.

And this is the first thing. The components are connected by wiring as shown in FIG. Briefly, the compressor 2 and the electric blower 5 are connected to a power source via a freezer thermostat 9, and their operation is controlled based on the temperature sensed by the thermostat 9. One switching contact 14b of the electromagnetic relay 14 is connected in parallel to the freezer compartment thermostat 9 to short-circuit it, and the other switching contact 14b' is connected to switch the temperature compensation heater 11 and the quench time timer 13 and energize them. Interposed between the power supplies. Further, the coil 14a of the electromagnetic relay 14 is connected to the power supply via the quenching switch 12 and the normally closed contact 16ai of the refrigerator thermostat 16, and the normally open contact of the refrigerator thermostat 16 is connected in parallel to the freezer thermostat 9 in order to short-circuit it. Connected.

In this configuration, when storing food or the like in the freezer compartment 7 and rapidly freezing the compartment 7, the contact suction coil 1 of the electromagnetic relay 14 is closed by manually closing the rapid cooling switch 12.
4a is energized, switching contacts 14b and 14b' are attracted and opened, short-circuiting the freezer compartment thermostat 9, causing the compressor 2 and electric blower 5 to operate continuously, and at the same time, energizing the temperature compensation heater 11 of the damper thermostat 1o. Then, the damper thermostat 10 main body is released from the heat retaining state, and the damper is automatically closed to substantially stop the supply of cold air to the refrigerator compartment 8. Therefore, the cold air ventilated by the electric blower 6 is intensively and continuously sent only to the freezer compartment 7 to start rapid freezing. Thereafter, when the rapid cooling timer 13 has accumulated a predetermined time, the rapid cooling switch 12 is opened in conjunction with the rapid cooling timer 13, and the rapid freezing ends.

On the other hand, while the quick cooling switch 12 is closed, that is, during quick freezing, the supply of cold air to the refrigerator compartment 8 is almost stopped, so the temperature in the refrigerator compartment gradually increases, but during this period, the refrigerator compartment 8 side is frequently used. When the temperature of the refrigerator room rises too much due to some factor such as -4- and the refrigerator room thermostat 16 reaches a predetermined temperature, the contact switches from the normally closed contact 15a to the normally open contact 15b, and the coil 14a of the electromagnetic relay 14 is energized. Interrupt and switch contact 1
4b.

14b' are both forcibly restored, energization to the damper thermostat 10's room compensation heater 11 is restarted1, but at this time, the short-circuited state of the freezer compartment thermostat 9 is maintained. Therefore, the compressor 2 and the electric blower 5 continue to operate continuously, and the cold air is continuously sent into the refrigerator compartment B, and the refrigerator compartment 8 is rapidly cooled, and the temperature - 1 - valve state is released and the temperature becomes low. reaching the predetermined temperature on the side. As a result, the refrigerator compartment thermostat 16 again switches the contact from the normally open contact 15b to the normally open contact 15aVc to resume rapid freezing. Also, during this quick freezing interruption time, the quick cooling time timer 1
Since the power supply to No. 3 is also stopped, the timer's time integration is also interrupted, and the quick freezing time is automatically extended by the time the quick freezing is interrupted.

As is clear from the above description, the present invention provides a switch that short-circuits the freezer compartment thermostat and at the same time stops the supply of electricity to the temperature compensation heater of the Danno thermostat. The system is operated continuously, and on the other hand, almost all cold air blowing to the refrigerator compartment is cut off, and cold air is blown only to the freezing compartment intensively and continuously, and quick freezing can be carried out more quickly and efficiently than in the conventional case.

In addition, if the refrigerator temperature rises too much during quick freezing due to the refrigerator thermostat, the quick freezing is interrupted, the refrigerator temperature is lowered, and then the quick freezing is automatically resumed. There is no fear that the temperature in the refrigerator room will rise too much due to prolonged freezing or frequent use of the refrigerator compartment during quick freezing, which will adversely affect the food, etc. in the refrigerator compartment. Furthermore, since the quick freezing time is extended from the predetermined time by the time that is interrupted to cool the refrigerator compartment, there is no inconvenience that the quick freezing time is insufficient and the essential quick freezing cannot be performed sufficiently.

As described above, it is possible to provide efficient, reliable, and quick forced ventilation rapid cooling while safely preserving food in a refrigerator with an extremely simple configuration and means, and the practical effects are also high.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a schematic electrical circuit diagram of the same refrigerator. 2...Compressor-5...Electric blower-9
...01100. Freezer thermostat, 10.
, , , Damper thermostat, 11 , , , , ,
Temperature compensation heater, 12, ,Quick cooling switch (switch), 15, ,. Refrigerator thermostat. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure/

Claims (1)

[Claims] 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, a damper thermostand that controls the amount of cold air to the refrigerator compartment, and the tamper. a temperature compensation heater that compensates for the operating characteristics of a thermostand; a switch that short-circuits the thermostat and at the same time stops power supply to the temperature compensation heater to perform rapid freezing for a predetermined time;
and a refrigerator compartment thermostat that operates when the temperature of the refrigerator compartment reaches a predetermined temperature or higher during quick freezing to restart power supply to the temperature compensation heater, and extends the predetermined quick freezing time by the time that the refrigerator compartment thermostat is activated. A refrigerator configured to allow