JPS58142179A - 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 a forced draft two-temperature refrigerator equipped with a freezer compartment and a refrigerator compartment.

Conventionally, in a forced draft two-temperature refrigerator equipped with a freezer compartment and a refrigerator compartment, and a damper thermostantler that controls the amount of cold air in the refrigerator compartment, a quick cooling method for the freezer compartment is to install a quick freezing switch that short-circuits the thermostat. Rapid freezing is generally performed by continuously operating a compressor and an electric blower for forced ventilation.
〇On the other hand, during rapid freezing operation of the freezer compartment by continuous operation of the compressor and electric blower, the amount of cold air in the refrigerator compartment is controlled by a damper thermostat to maintain it at a predetermined temperature. In order to compensate for this, a temperature compensation heater is installed, and by energizing this heater, the damper is controlled to open slightly. Even during quick freezing operation, the heat of the heater does not affect the heat-sensitive part of the damper thermostat. Control of the damper opening direction is maintained. This phenomenon does not cause a problem when the outside air temperature is high and the inside temperature is also high, but it is not desirable when the outside air temperature is low. If quick freezing is performed when the outside temperature is low, the temperature in the refrigerator compartment is sufficiently low and the compressor and electric blower are operated continuously for an appropriate period of time to continuously send cold air into the refrigerator compartment. If rapid freezing is continued for a longer period of time, the temperature of the refrigerator compartment will be lowered to a minus temperature range of 1, which causes the food in the refrigerator compartment to freeze.

The present invention solves the above problem by controlling the conductivity compensation heater of the damper thermostat that adjusts the amount of cold air to the refrigerator compartment during quick freezing by suppressing the amount of cold air supplied to the refrigerator compartment when the outside temperature is low. It is something to do. 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 main body 1 is divided into two compartments, an upper freezing compartment 7 and a lower refrigerating compartment 8, by a partition wall 6 having an evaporator 4 and an electric blower 6 for forced ventilation. 9 is a thermostat placed in the freezer compartment 7, which opens and closes according to the temperature of the freezer compartment to control the compressor 2 and electric blower 5; 010 is a damper thermostat placed at the cold air outlet of the refrigerator compartment 8; The damper is controlled to open and close depending on the temperature of the refrigerator compartment, thereby maintaining the temperature of the refrigerator compartment at a desired temperature. This damper (Mostara)
10Kl-J: A temperature compensation heater 11 is provided to compensate 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 6 as shown by arrows in the figure.

On the other hand, in FIG. 2, reference numeral 12 denotes a quick freezing switch equipped with a timer (not shown) for automatic reset, which has a contact point for energizing the temperature compensation heater 11, and a negative characteristic heat-sensitive resistance element 13 (described later) when closed. It has a contact piece 12a that switches the contact that energizes the series circuit of the compensation heater 11, and a contact piece 12b that has a contact that short-circuits the thermostat 9 when closed. Reference numeral 13 denotes a negative characteristic heat-sensitive resistance element provided outside the refrigerator body 1 to sense the temperature outside the refrigerator body 1, and is connected as described above.

In such a configuration, when performing quick freezing of the freezer compartment 7, the thermostat 9 is short-circuited by closing the quick freezing switch 12, and the compressor 2 and the forced draft electric blower 6 are continuously operated to perform rapid freezing. Freezing starts, but at this time the temperature compensation heater 11 of the damper thermostat 10
In iJ, since a circuit is configured that conducts current in series through the negative characteristic heat-sensitive resistance element 13 provided outside the main body, when the outside temperature is relatively high, the specific resistance of the heat-sensitive resistance element 13 is small and the temperature compensation heater 11 The heat generation capacity is maintained at the same level as during normal operation. However, when the outside temperature decreases, the specific resistance of the heat-sensitive resistance element 13 increases, and the heat generation capacity of the temperature compensation heater 11 decreases.
The amount of cold air supplied into the refrigerator compartment 8 is suppressed by reducing the opening degree of the damper. This tendency becomes stronger as the outside air temperature is lower, and the lower the outside air temperature is, the less cold air flows into the refrigerator compartment 8. (Select the resistance of the heat-sensitive resistance element 13.)

As is clear from the above explanation, the present invention allows the temperature compensation heater of the heat exchanger thermostat to reduce the amount of heat generated as the outside air temperature decreases during quick freezing, thereby reducing the amount of cold air flowing into the refrigerator compartment. Even if the compressor and electric blower are operated continuously during rapid cooling at outside temperature, the temperature of the refrigerator compartment does not drop as much as in the conventional case, and the rapid cooling time becomes longer and food, etc. in the refrigerator compartment freezes. It does not cause any problems and has extremely high practical utility.

[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 refrigerator. 2...Compressor, 5...Electric blower, 9
...Thermostat, 1o ... Damper thermostat, 11 ... Temperature compensation heater,
12... ...Quick freezing switch, 13...Negative characteristic heat-sensitive resistance element (means). Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 1 /- 111 Figure 2

Claims (1)

[Claims] A freezer compartment, a refrigerator compartment, an electric blower that circulates cold air to each compartment, a thermostat that controls the operation of the compressor and the electric blower to control the temperature of the freezer compartment, and adjusts the amount of cold air to the refrigerator compartment. a damper thermostat that controls the temperature of the refrigerator compartment; a hot water temperature compensation heater that compensates for the operation of the damper thermostat; and a quick-freeze switch that short-circuits the thermostat; A refrigerator that has a means of shrinking as the temperature decreases.