JPS6249174A - 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 Technical Field The present invention relates to a refrigerator that controls the opening and closing of a damper device that opens and closes a cold air inlet inside the refrigerator.

<Prior Art> Usually, in a refrigerator-freezer, a refrigerator main body 1 is partitioned by a partition wall 2 as shown in FIG. 4, and a freezing compartment 4 is provided in the upper stage and a refrigerating compartment 5 is provided in the lower stage. The flow of cold air to the freezer compartment 4 and the refrigerator compartment 5 is discharged into the freezer compartment 4 and the refrigerator compartment 5 through the cold air inlet louver 9.10 by the 7-ring 6 of the main body rear wall IA and the fan motor 7. And cold air outlet louver 11
．． 1.2A through the partition wall 2) 2A to the cooler 1
I'll come back to 3. When the refrigerator compartment 5 is cooled to an appropriate temperature, the damper device 15 that opens and closes the cold air intake 14 in the refrigerator is closed, as shown in FIG. 5, and cold air no longer flows into the refrigerator compartment 5. When the damper device 15 is in the closed state, cold air no longer flows, so the humid air A in the refrigerator compartment 5 flows back into a part of the damper from the inlet louver 10 of the refrigerator compartment 5 (FIG. 6). At this time, a portion of the damper has a lower temperature than the humid air, so dew condensation B occurs, and since the cold air is below 0° C., the condensed moisture freezes. Therefore, even if the damper device 15 attempts to open the next time, the damper 15A will be frozen.
will not move, and cold air will not flow to the refrigerator compartment 5. Therefore, the temperature of the refrigerator compartment 5 becomes high, and it becomes unable to fulfill its role as a refrigerator.

<Objective> In view of the above, an object of the present invention is to provide a refrigerator in which a damper device can smoothly open and close a cold air inlet.

<Example> An example of the present invention will be described below, mainly based on FIGS. 1 to 7. Note that functional parts that are the same as those described in the prior art are designated by the same reference numerals. That is, the refrigerator according to the present invention includes a damper device 15 for opening and closing the cold air intake 14 in the refrigerator, a damper heater 16 for preventing the damper device 15 from freezing, and a damper heater 16 for preventing the damper device 15 from freezing. A control device 17 is provided that turns off the damper heater 16° and turns on the damper heater 16° when the damper device 15 is closed.

The structure of the refrigerator is as shown in Figures 4 to 6. That is, the refrigerator main body 1 is divided by a partition wall 2, and a freezer compartment 4 is provided in the upper stage and a refrigerator compartment 5 is provided in the lower stage. Then, a cold air gap 2A is formed on the partition wall 2, and the cold air gap 2A is formed on the partition wall 2.
Cooling 813 is arranged within A. Further, a cold air intake louver 9 is formed on the rear wall of the freezing compartment 4, and a cold air outlet louver 11 is formed on the bottom wall of the freezing compartment 4, which communicate with the housing 2A.

Further, the cold air intake I4 is formed on the rear wall of the refrigerator compartment 5, and a cold air outlet louver 12 is formed on the top wall of the refrigerator compartment 5, which communicates with the housing 2A. Further, a 7-inch fan 6 and a fan motor 7 are arranged on the rear wall of the refrigerator main body 1 and at the rear of the refrigerator 2A. The inlet louver 10 that guides cold air downward from the cold air population 14 of the refrigerator compartment 5 is connected to the refrigerator compartment 5.
A temperature sensor 18 such as a thermistor for detecting the temperature of the refrigerator compartment 5 is disposed below the louver 10 .

The damper device 15 includes a damper driving motor 19 interposed between the louver 10 and the rear wall of the refrigerator compartment 5;
The damper 15A is opened and closed by the motor. As shown in FIG. 7, a cam 19B is fixed to the motor shaft 19A of the motor 19, and an L-shaped link 19I follows the cam 19B and swings about the shaft 19C.
5/ The damper 1 is provided at the other end of the link 19D.
5A is formed. The motor 19 rotates in the same direction, and is stopped every half rotation by a signal from the control device 17. FIG. 7 shows the motor 19 in an open state. Further, the damper heater 16 is disposed on the rear wall of the refrigerator compartment 5 and on the peripheral wall of the cold air vent 14.

The control device 17 has a function of controlling the opening and closing of the damper device 15 in order to maintain the temperature of the refrigerator compartment 5 at a set temperature, and a function of controlling the opening and closing of the damper device 15 to prevent the damper 15A from freezing.
It has a function of operating the damper heater 16 when A is closed. That is, as shown in FIG. a microcomputer (hereinafter referred to as a microcomputer) 22 which inputs the input signal and compares and processes the signal from the temperature setting device 21; and a heater relay switch 23 which controls the damper heater 16 to turn on and off based on the output signal of the microcomputer 22. , and a damper relay switch 24 that turns on the damper drive motor 19 in response to an output signal from the microcomputer 22.

Note that FIG. 1 shows the electric circuit of the refrigerator, in which a fan motor 7 and a compressor 24 for compressing and discharging the refrigerant passing through the cooler 13 are connected in parallel to a power source 25, and these are arranged in the freezer compartment 4. ON-FF control is controlled by the temperature-sensitive switch 26. Further, the microcomputer 22 has a program ROM, a data RAM, and an ALU, and is driven by a reference clock oscillation circuit 27.

In the above configuration, when the compressor 24 is operated by the temperature-sensitive switch 26, the flow of cold air to the freezer compartment 4 and the refrigerator compartment 5 is controlled by the cold air inlet louver 9. and is discharged into the freezer compartment 4 and refrigerator compartment 5. Then, the cold air returns to the cooler 13 through the cold air outlet louvers 11 and 12 from the inside of the partition wall 2 (2A). When the refrigerator compartment 5 is cooled to the appropriate temperature, the damper relay switch 24 is turned on by the close output signal from the temperature sensor 18. :L, one damper drive motor is driven to close and open the damper 15A. Therefore, the cold air intake 14 is closed by the gunper 15A, and cold air no longer flows to the refrigerator compartment 5 side. At this time, the damp air in the refrigerator compartment 5 from the discharge louver 10 of the refrigerator compartment 5 condenses, and the cold air condenses because the temperature of the damper part and the backflow waist and the part of the damper is lower than that of the humid air. Since the temperature is below 'C, condensed water tends to freeze. However, immediately after setting the damper ISA, microcomputer 2;? Since the heater relay switch 23 is turned on and the damper heater 16 is driven, the area around the cold air vent 14 is heated to prevent condensed water from freezing. Therefore, when the temperature of the refrigerator compartment 5 becomes equal to or higher than the set temperature and the damper 15A is opened again to allow cold air to flow into the refrigerator compartment 5, the damper 15A opens smoothly.

<Effects> As is clear from the above description, the present invention provides a damper device for opening and closing a cold air inlet in a refrigerator, a damper heater for preventing the damper device from freezing, and a damper heater for preventing the damper device from freezing when the damper device is opened. and a control device that turns the damper heater OFF and turns the damper heater ON when the damper device is closed. The damper opens and closes smoothly, and the damper heater only operates when the damper is closed (71+7), resulting in low power consumption and a high-performance refrigerator. .

[Brief explanation of drawings]

FIG. 1 is an electric circuit diagram of a refrigerator showing an embodiment of the present invention;
fpJ2 diagram (70-Nayat with damper control as well as soil,
FIG. 3 is a time chart, FIG. 4 is a sectional view showing the structure of the refrigerator, FIG. 5 is a sectional view of the main part showing the damper in the closed state, and FIG. 6 is a sectional view of the main part showing the damper in the open state. FIG. 7 is a configuration diagram of the damper device. 1: Refrigerator body, 2: Partition wall, 2A: Cold air intake, 4:
Freezer compartment, 5: Refrigerator compartment, 6: 7mm, 7:7mm motor,
9.10: Cold air population louver, 11: Cold air outlet louver, 1
2: Cold air outlet louver, 14: Cold air inlet [ ], 15: Dambar device, 15A: Damper, 16: Damper heater, 1
7: Control device, 18: Temperature sensor, 19: Damper drive motor, 20: A/D converter, 22: Micro pump unit, 23: Relay switch for heater, 24: Relay switch for damper.

Claims (1)

[Claims] A damper device that opens and closes a cold air inlet in the warehouse, a damper heater that prevents the damper device from freezing, and a control that turns off the damper heater when the damper device is opened and turns the damper heater ON when the damper device is closed. A refrigerator characterized by being provided with a device.