KR100241451B1 - Apparatus for refrigerating temperature compensating of refrigerator - Google Patents

Abstract

The present invention relates to a refrigerator refrigerating compartment temperature compensator, in the prior art has a problem that the cost increases by attaching a sensor to the outside of the refrigerator in order to prevent the temperature rise of the refrigerating compartment by the external temperature.

Accordingly, the present invention has been made to solve the above-mentioned conventional problems, the refrigerator compartment temperature compensation apparatus, comprising: a freezer compartment temperature sensor for sensing the temperature of the freezer compartment as an input value for controlling the compressor and the fan; A refrigerator compartment temperature sensor configured to sense a temperature of the refrigerator compartment as an input value for controlling the operation of the damper to control the amount of cold air directed toward the refrigerator compartment; A microcomputer which senses a temperature value from the temperature sensor and compares it with a set value, and controls the operation of the compressor, the fan, and the damper; It is installed around the freezer temperature sensor for temperature compensation of the refrigerating chamber, and generates a device when the ambient temperature where the refrigerator is installed is low, thereby increasing the detection input value of the freezer compartment temperature sensor to further drive the compressor and the fan. Providing low freshness of the load in the refrigerating compartment by preventing the compressor from lowering the compressor operation rate even when the temperature outside the refrigerator is low, and reducing the cost by using cheap resistors instead of expensive sensors. It works.

Description

Fridge refrigerator compartment temperature compensation device {APPARATUS FOR REFRIGERATING TEMPERATURE COMPENSATING OF REFRIGERATOR}

The present invention relates to a refrigerator refrigerating compartment temperature compensator, and in particular, when used in a low ambient temperature of the refrigerator, the operation rate of the compressor decreases, so that a resistance is attached to the periphery of the freezer compartment sensor to prevent the internal temperature of the refrigerating compartment from changing. It relates to a refrigerator refrigerator compartment temperature compensation device for connecting the power supply to the resistor when the compressor is off to restart the compressor by the resistance heat.

1 is a vertical cross-sectional view showing the configuration of a conventional refrigerator, as shown therein an evaporator 10 for evaporating a low-temperature, low-pressure refrigerant to a saturated vapor without liquid content; A compressor (11) for making high-temperature, high-pressure steam by sucking and compressing the low-temperature and low-pressure refrigerant vapor discharged from the evaporator (10); A refrigerator compartment electronic damper (Damper) 12 capable of controlling the temperature of the refrigerator compartment by supplying and blocking cold air from the refrigerator compartment; A refrigeration fan motor 13 which drives a refrigeration fan for forcibly blowing cold air generated in the evaporator 10 by acting as a cold air circulation; A refrigerator compartment temperature sensor TH1 for detecting a refrigerator compartment temperature; It consists of a freezer compartment temperature sensor (TH2) for detecting the temperature of the freezer compartment.

Referring to the accompanying drawings, the operation of the conventional device configured as described above is as follows.

2 is a circuit diagram showing the structure of a conventional refrigerator, as shown therein, a compressor 11 for making high-temperature and high-pressure steam by sucking and compressing low-temperature and low-pressure refrigerant vapor discharged from an evaporator; A refrigerator compartment electronic damper (Damper) 12 capable of controlling the temperature of the refrigerator compartment by supplying and blocking cold air from the refrigerator compartment; A refrigeration fan motor 13, which serves as a cold air circulation to drive a refrigeration fan for forcibly blowing cold air generated in the evaporator; A refrigerator compartment temperature sensor TH2 for detecting a refrigerator compartment temperature; A freezer compartment temperature sensor TH1 for sensing a temperature of the freezer compartment; An ambient temperature sensor TH3 for sensing a temperature outside the refrigerator; A microcomputer 30 generating a control signal by the temperature sensed by the refrigerating compartment temperature sensor TH2, the ambient temperature sensor TH3, and the freezing compartment temperature sensor TH1; A plurality of inverters I1 and I2 for inverting the control signal of the microcomputer 30; The first and second relay units RL1 and RL2 are driven by the signals inverted by the inverters I1 and I2.

When the temperature detected by the freezer compartment temperature sensor TH1 in the microcomputer 30 is higher or lower than the set freezer compartment temperature, the operation of the compressor 11 and the freezer fan motor 13 is turned on / off to freeze the temperature of the freezer compartment. If the temperature detected by the refrigerating compartment temperature sensor TH2 is higher than the temperature of the set refrigerating compartment, the driving of the first and second relays RL1 and RL2 is stopped to close the electronic damper 12, and the set refrigerating compartment temperature is adjusted. If lower than, the first and second relays RL1 and RL2 are continuously driven to develop the electronic damper 12 until the set temperature is reached.

If the external temperature detected by the ambient temperature sensor TH3 located outside of the refrigerator is lower than a preset external temperature, the microcomputer 30 may be set to a set temperature of the refrigerating chamber to prevent an increase in the refrigerating chamber temperature due to the external temperature. Irrespective of force, the first and second relays RL1 and RL2 are continuously driven to develop the electronic damper 12.

As described above, in the related art, the cost is increased by attaching a sensor to the outside of the refrigerator in order to prevent the temperature rise of the refrigerating chamber due to the external temperature.

Accordingly, the present invention has been made in order to solve the above-mentioned conventional problems, by attaching a resistor around the freezer compartment sensor to connect the power to the resistor when the compressor is off to restart the compressor by the resistance heating The purpose is to provide.

1 is a longitudinal sectional view showing a configuration of a conventional refrigerator.

2 is a circuit diagram showing a configuration of a conventional refrigerator.

Figure 3 is a circuit diagram showing the configuration of the refrigerator refrigerator compartment temperature compensation device of the present invention.

* Explanation of symbols for the main parts of the drawings

10: evaporator 11: compressor

12 electronic damper 13 freezer fan motor

14 power supply 30 microcomputer

40: resistor RL1, RL2: first, second relay

I1, I2: Inverter TH1: Freezer Temperature Sensor

TH2: Cold room temperature sensor TH3: Ambient temperature sensor

The refrigerator refrigerator compartment temperature compensation apparatus of the present invention for achieving the above object comprises: a refrigerator compartment temperature compensation apparatus comprising: a freezer compartment temperature sensor that senses a temperature of a freezer compartment as an input value for controlling a compressor and a fan; A refrigerator compartment temperature sensor configured to sense a temperature of the refrigerator compartment as an input value for controlling the operation of the damper to control the amount of cold air directed toward the refrigerator compartment; A microcomputer which senses a temperature value from the temperature sensor and compares it with a set value, and controls the operation of the compressor, the fan, and the damper; It is installed around the freezing compartment temperature sensor for temperature compensation of the refrigerating compartment, and generates a resistance when the ambient temperature where the refrigerator is installed is low, thereby increasing the detection input value of the freezing compartment temperature sensor to further drive the compressor and the fan. It features.

Hereinafter, the operation of the present invention will be described in detail with reference to the accompanying drawings.

3 is a circuit diagram showing the configuration of the refrigerator refrigerating compartment temperature compensator of the present invention. As shown in FIG. 3, a compressor 11 which makes high-temperature and high-pressure steam by inhaling and compressing a low-temperature and low-pressure refrigerant vapor discharged from an evaporator is shown. Wow; A refrigerator compartment electronic damper 12 capable of controlling the temperature of the refrigerator compartment by supplying and blocking cold air from the refrigerator compartment; A refrigeration fan motor 13, which serves as a cold air circulation to drive a refrigeration fan for forcibly blowing cold air generated in the evaporator; A refrigerator compartment temperature sensor TH2 for detecting a refrigerator compartment temperature; A freezer compartment temperature sensor TH1 for sensing a temperature of the freezer compartment; A microcomputer 30 generating a control signal by the temperature detected by the refrigerating compartment temperature sensor TH2 and the freezing compartment temperature sensor TH1; A plurality of inverters I1 and I2 for inverting the control signal of the microcomputer 30; First and second relay parts RL1 and RL2 driven by signals inverted by the inverters I1 and I2; Located around the freezer compartment sensor, one side is connected to the power source 14, the other side is connected to the first relay RL1, and the first relay RL1 is stopped when the compressor 11 and the freezer fan motor 13 are stopped. The resistor 40 generates heat by switching.

When the temperature detected by the freezer compartment temperature sensor TH1 in the microcomputer 30 is higher or lower than the set freezer compartment temperature, the operation of the compressor 11 and the freezer fan motor 13 is turned on / off to freeze the temperature of the freezer compartment. If the temperature detected by the refrigerating compartment temperature sensor (TH2) is lower than the set temperature of the refrigerating compartment, the driving of the first and second relays (RL1, RL2) is stopped to close the electronic damper 12, and the If the temperature is higher than the temperature, the first and second relays RL1 and RL2 are continuously driven to expand the electronic damper 12 until the set temperature is reached. After reaching the set temperature, the compressor 11 and the freezer compartment are reached. As soon as the fan motor 13 stops, the first relay RL1 is connected to the resistor 40, and the temperature detected by the freezer compartment temperature sensor TH2 is changed by the heat generated by the resistor 40 so that the compressor ( 11) and the freezer compartment fan motor (13) are restarted and set It was a high supercooling degrees compensating for cooling reduced by the drop in the compressor operation rate by the low temperature of the refrigerator to the outside is prevented from rising the temperature of the refrigerating compartment.

As described above, the refrigerator refrigerating compartment temperature compensator of the present invention prevents a decrease in cooling due to a decrease in the compressor operation rate even when the temperature outside the refrigerator is low, thereby maintaining the freshness of the load contained in the refrigerating compartment and replacing the expensive sensor. By using this, the cost is reduced.

Claims (1)

A refrigerator compartment temperature compensation device of a refrigerator, comprising: a freezer compartment temperature sensor configured to sense a temperature of a freezer compartment as an input value for controlling a compressor and a fan; A refrigerator compartment temperature sensor configured to sense a temperature of the refrigerator compartment as an input value for controlling the operation of the damper to control the amount of cold air directed toward the refrigerator compartment; A microcomputer which senses a temperature value from the temperature sensor and compares it with a set value, and controls the operation of the compressor, the fan, and the damper; It is installed around the freezer compartment temperature sensor for temperature compensation of the refrigerating compartment, and generates heat when the ambient temperature in which the refrigerator is installed is low, thereby increasing the detection input value of the freezer compartment temperature sensor and configured to further drive the compressor and the fan. Refrigerator freezer temperature compensation device.

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