JPH07101142B2 - Refrigerator temperature control device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature control device for a refrigerator or the like, particularly on the refrigerating compartment side.

2. Description of the Related Art A conventional temperature control device of this type has a structure as shown in FIG.

That is, the air cooled by the cooler 1 is distributed to the freezer compartment 4 and the refrigerating compartment 5 through the cool air duct 3 by the cool air circulation blower 2. The temperature of the freezer compartment 4 is controlled by ON / OFF control of the operation of the compressor 7 by the temperature controller 6 attached to the freezer compartment 4. The operation of the cooling circulation fan 2 is ON / OFF controlled in conjunction with the operation of the compressor 7.

Next, the temperature control of the refrigerator compartment 5 will be described. A damper type temperature controller 8 opens and closes the damper unit 8b according to the temperature of the temperature detecting unit 8a. Damper part 8b
Is attached so as to open and close the refrigerating compartment side opening 3a of the cold air duct 3. That is, if the temperature of the refrigerating room 5 rises, this is detected by the temperature detecting section 8a and the opening of the damper section 8b is increased to increase the amount of cold air flowing into the refrigerating room 5 for cooling. On the contrary, when the temperature of the refrigerating compartment 5 falls below a predetermined value, the damper part 8b is closed arbitrarily and the amount of inflowing cold air is limited, so that the damper part 8b is opened / closed according to the temperature of the refrigerating compartment 5 to inflow. It controls the temperature by controlling the amount of cold air.

However, with such a structure, the damper part 8b of the damper-type temperature controller 8 becomes inoperable due to freezing, and the refrigerating chamber 5 is overcooled to use the food contained therein. There was a problem of freezing to a state where it could not be done. This is for the following reason.

The inside of the refrigerating room 5 is generally set at plus 3 to 5 ° C,
The air is relatively humid due to the moisture content of the food contained therein. The air in the cool air duct 3 is a relatively dry air having a low temperature of -20 to -25 ° C. Therefore, the cold air duct 3
Since the damper part 8b of the damper-type temperature controller 8 attached so as to open and close the refrigerating compartment side opening 3a of the refrigerating compartment is also well cooled, the moisture in the refrigerating compartment 5 is likely to be condensed and frozen. It is in. When a condition in which the movement of the damper portion 8b is extremely small is encountered due to the usage state of the refrigerator, it is particularly apt to freeze, and the opening and closing of the damper portion 8b becomes impossible due to the freezing.

The present invention solves such conventional problems, and provides a temperature control device that does not become inoperable due to freezing or the like depending on the usage state of the refrigerator.

Means for Solving the Problems Technical means of the present invention for solving the above problems include a blower for ventilating the cool air of a cooler to a freezer compartment and a refrigerating compartment via a cool air duct, and a cold compartment of a cool air duct. A trap provided in the air passage of the air conditioner, a blower for refrigerating room cold air circulation located below the blower that sucks cold air that overcomes the air passage resistance of the trap, and a blower for refrigerating room cold air circulation. And a temperature sensor in the refrigerating room for driving the.

Action The action of this technical means is as follows.

That is, when the blower for refrigerating room cool air circulation is stopped, the cool air in the cool air duct provided with the trap-like air passage resistance is, due to the air passage resistance, to the outlet opening of the cold air duct,
It does not reach and accumulates near the bottom of the trap. Therefore, the temperature difference before and after the blower for cold air circulation in the refrigerator is small,
The blower has a structure in which water droplets do not easily adhere to it. When the blower for circulating cold air in the refrigerating room operates, the suction force of the blower overcomes the trap-like air passage resistance provided in the cool air duct, and the cool air in the cool air duct is supplied into the refrigerating room to perform a normal cooling action. It is a thing.

Example Hereinafter, one example of the present invention will be described with reference to the accompanying drawings. In FIG. 1, reference numeral 11 is a cooler, which blows cool air through a cool air duct 13 to a freezing room 14 and a refrigerating room 15 by a cooling circulation fan 12 to cool each room. The portion of the cold air duct 13 on the side of the refrigerating chamber is provided with a duct partition plate 16 for the first
Like the duct 13a and the second duct 13b, they are divided into traps to provide ventilation resistance. The ventilation resistance is adjusted according to the length of the trap and the air passage areas of the first duct 13a and the second duct 13b. At the outlet of the opening 17 of the second duct 13b, there is provided a blower 18 for cold air circulation in the refrigerating room, and only when the blower is operating, the air duct resistance composed of the first duct 13a and the second duct 13b. It is set to discharge cold air that overcomes. 19 is a temperature sensor, which detects the temperature of the refrigerating compartment 15 and turns on the blower 18 for the refrigerating compartment cold air circulation.
-OFF control. Reference numeral 20 denotes a freezer compartment temperature controller, which controls the compressor 21 to be turned on and off according to the temperature of the freezer compartment 14 to obtain a predetermined freezer compartment temperature.

Next, the operation of the configuration of this embodiment will be described. When the temperature of the refrigerating room 15 is lower than the predetermined temperature, the cooling air blower 18 for refrigerating room cold air circulation is stopped by the command of the temperature sensor 19, so that the cool air sent through the cool air duct 13 is the first duct 13a.
The cold air is not supplied to the refrigerating chamber 15 because it is blocked by the air passage resistance formed by the second duct 13b. Therefore, the temperature around the blower 18 for circulating the cold air in the refrigerating room is controlled by the temperature atmosphere in the refrigerating room, so that there is no difference in temperature and there is no fear of dew condensation.

When the temperature of the refrigerating room 15 is higher than or equal to a predetermined temperature, the blower 18 for refrigerating room cold air circulation operates according to a command from the temperature sensor 19, and this suction force causes an air path resistance composed of the first duct 13a and the second duct 13b. And the cool air that is sent through the cool air duct 13 passes through the first duct 13a and the second duct 13b,
The air is blown into the refrigerating chamber 15 to perform a normal cooling action.

Effects of the Invention As described above, the present invention controls the temperature in the refrigerating room by the cool air duct provided with the trap-like air passage resistance and the cooler circulation air blower installed in the outlet opening of the cool air duct. Therefore, the temperature difference of the ambient air in the temperature control device can be reduced, and the problem of inability to control the temperature due to freezing, which is the case when the conventional damper type temperature controller is used, is eliminated. Moreover, since the blower is used, the refrigerating chamber can be uniformly and evenly cooled.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a refrigerator according to an embodiment of the present invention, and FIG. 2 is a vertical sectional view of a conventional refrigerator. 13 …… Cold air duct, 13a …… First duct, 13b …… Second duct, 17 …… Opening part, 18 …… Cooling room cold air circulation blower,
19 ... Temperature sensor.

Claims (1)

[Claims] 1. A cooler, a blower for ventilating the cool air of the cooler to a freezing compartment and a refrigerating compartment through a cold air duct, and a trap provided in the air passage of the cool air duct to the refrigerating compartment and having an air passage resistance. And a refrigerator for refrigerating room cool air circulation located below the blower that sucks in cool air that overcomes the air passage resistance of the trap, and a refrigerator temperature sensor for operating the refrigerating room cool air circulation blower. Temperature control device.