KR20010064510A - Refrigerator and temperature control method thereof - Google Patents

Abstract

PURPOSE: A refrigerator and a temperature controlling method thereof are provided to promptly response to inside temperature change of a refrigerating chamber and to reduce a cost. CONSTITUTION: An input end of a control unit(41) is composed as a microcomputer containing a control program. Moreover, the input end of the control unit adheres refrigerating and freezing chamber temperature-detecting sensors(39,37) sensing temperature of a freezing chamber(13) and a refrigerating chamber(15). An output end of the control unit connects a blowing fan(33), a compressor(31), and a damper(35) with a first relay and a second relay. Thus, the control unit controls the second relay based on an inside temperature value of the refrigerating chamber detected by the refrigerating chamber temperature detecting sensor to open or close an air passage(25b) of the refrigerating chamber. Then, the control unit controls the first relay to drive or stop the compressor and the blowing fan. To freeze, the freezing chamber opens the air passage of the refrigerating chamber through the damper by controlling the second relay. Moreover, the freezing chamber controls the first relay to drive the compressor and the blow fan.

Description

Refrigerator and temperature control method {REFRIGERATOR AND TEMPERATURE CONTROL METHOD THEREOF}

The present invention relates to a refrigerator and a temperature control method thereof, and more particularly, to a refrigerator and a temperature control method thereof, which can quickly respond to a change in the internal temperature of a refrigerating compartment and reduce costs by eliminating an outside temperature detection sensor. It is about.

1 is a longitudinal sectional view of a conventional refrigerator. As shown in the drawing, the refrigerator rotates the main body 111 and the freezer compartment 113 and the refrigerating chamber 115, respectively, having the freezing chamber 113 and the refrigerating chamber 115 interposed therebetween along the partition wall 121. It has a freezing chamber door 117 and a refrigerating chamber door 119 hinged to the main body 111 to be able to. In the rear region of the freezing chamber 113, the shroud member (a) is spaced apart from the inner wall of the main body 111 so as to form a cooling air flow passage 124 through which air from the freezing chamber 113 and the refrigerating chamber 115 is cooled. 123 is provided, one side of the shroud member 123 is provided with a grill member 127, the air discharge port 128 is formed.

In both regions of the partition wall 121, a freezer compartment return passage 125a is formed to return the air in the freezer compartment 113 to the air passage 124, and the air in the refrigerating compartment 115 is the air passage 124 in the central region. The refrigerator compartment return flow path 125b is formed so that it may return to ().

An evaporator 129 is installed in the cooling air passage 124 so that the air introduced into the air passage 124 through each of the return passages 125a and 125b can be heat-exchanged, and an evaporator 129 above the evaporator 129. Blowing fan 131 is installed so that the air passing through) can be provided to the freezing chamber 113 or the refrigerating chamber 115. The damper 134 is installed in the inlet region of the air flow passage 126 formed to communicate with the freezing chamber 113 formed in the rear region of the refrigerating chamber 115.

The compressor 133 is installed in the lower rear region of the main body 111 so as to compress the refrigerant circulated from the evaporator 129, and on one side of the compressor 133 receives the refrigerant compressed by the compressor 133. A condenser (not shown) for condensing through heat radiation is provided.

On the other hand, the freezer compartment temperature detection sensor 135 is installed in the upper region of the freezer compartment 113 so as to detect the internal temperature of the freezer compartment 113, and the internal temperature of the refrigerator compartment 115 is detected on the sidewall of the refrigerator compartment 115. The refrigerator compartment temperature detection sensor 137 is provided. In the upper region of the main body 111, an outside temperature detection sensor 139 is mounted to detect the outside temperature.

2 is an electric circuit diagram of the refrigerator of FIG. 1. As shown, the control unit 141, which is configured in the form of a microcomputer with a built-in control program, includes a freezer compartment temperature detection sensor 135, a refrigerating compartment temperature detection sensor 137, and an outside air temperature detection sensor 139, respectively. It is. The control unit 141 also includes a blower fan 131 based on the internal temperature values of the freezing chamber 113 and the refrigerating chamber 115 detected by these temperature detection sensors 135, 137, and 139, and the detected outside air temperature values. The blower fan 131, the compressor 133, and the damper 134 are connected to each other through the first relay 143 and the second relay 145 so as to control the compressor 133 and the damper 134. have. In the drawings, R1 to R5 are resistors, and IC2 is a diode unit.

By such a configuration, when the internal temperature value of the freezer compartment detected by the freezer compartment temperature detection sensor 135 is different from the cooling target temperature value of the freezer compartment 113 by a predetermined value ΔT3 or more, the control unit 141 relays the first relay. 143 is controlled so that power is applied to the compressor 133 and the blowing fan 131. When the detected internal temperature value of the freezer compartment 113 satisfies the cooling target temperature condition, the first relay 143 is controlled to stop driving of the compressor 133 and the blower fan 131.

On the other hand, if the detected internal temperature value of the refrigerating chamber 115 is different from the cooling target temperature value of the refrigerating chamber 115 by a predetermined value ΔT 4 or more, the controller 141 controls the second relay 145 to damper 134. By opening the air passage 126, the cold air from the freezing chamber 113 is provided to the refrigerating chamber 115 through the air passage 126.

The control unit 141 controls the second relay 145 when the internal temperature value of the refrigerating chamber 115 detected by the refrigerating chamber temperature detection sensor 137 satisfies the cooling target temperature condition, so that the damper 134 is an air flow path ( 126 to block the second relay 145 to compensate for the temperature of the refrigerating chamber 115 in response to the change in the outside temperature based on the outside temperature detected by the outside temperature detection sensor 139. .

On the other hand, compared to the freezer compartment 113, the entry and exit of food is more frequent, the refrigerating chamber 115 is frequently opened, the contact with the outside air is relatively increased, causing frequent fluctuations in the room temperature.

By the way, in such a conventional refrigerator, the freezer compartment 113 and the refrigerating compartment are controlled by controlling the compressor 133 and the blowing fan 131 based on the internal temperature value of the freezer compartment 113 detected by the freezer compartment temperature detection sensor 135. Since the internal temperature of the 115 is adjusted, there is a problem in that the temperature of the refrigerating chamber 113 cannot be quickly responded to.

In addition, since the refrigerating chamber 115 having a larger indoor volume than the freezing chamber 113 has a relatively large heat loss, the main body may detect a change in temperature of the outside air to compensate for an increase in the internal temperature of the refrigerating chamber 115. Since the outside air temperature detection sensor 139 is mounted on the upper surface of the 111, there is a problem in that the manufacturing cost due to the addition of parts and the manufacturing cost due to the addition of parts is increased.

Accordingly, an object of the present invention is to provide a refrigerator and a method of controlling the temperature thereof, which can quickly respond to a change in the internal temperature of the refrigerating chamber and reduce the cost.

1 is a longitudinal sectional view of a conventional refrigerator,

2 is an electric circuit diagram of the refrigerator of FIG.

3 is a longitudinal sectional view of a refrigerator according to one embodiment of the present invention;

4 is an electric circuit diagram of the refrigerator of FIG. 3;

5 is a flowchart illustrating a temperature control method of the refrigerator according to the present invention.

Explanation of symbols on the main parts of the drawings

11: body 13: freezer

15: refrigerator compartment 23a: freezer return flow path

23b: refrigerating chamber return passage 25a: cooling air passage

29: evaporator 31: compressor

33: blower fan 35: damper

37: refrigerator compartment temperature sensor 39: freezer compartment temperature detection sensor

41: control unit

According to the present invention, the freezing chamber and the refrigerating chamber, and the main body is formed with a cooling air passage so that the air in the freezing chamber and the refrigerating chamber is cooled while circulating; An evaporator disposed in the cooling air passage to cool air circulated; A compressor disposed on one side of the main body to compress the refrigerant circulated from the evaporator; At least one refrigerator compartment temperature detection sensor disposed in the refrigerator compartment and detecting an internal temperature of the refrigerator compartment; And a control unit for controlling the compressor to be driven and stopped based on an internal temperature value of the refrigerating compartment detected by the refrigerating compartment temperature detecting sensor.

Here, at least one freezer compartment temperature detection sensor disposed in the freezer compartment for detecting an internal temperature value of the freezer compartment, wherein the control unit, when the temperature detection result of the refrigerating compartment, satisfies the cooling temperature conditions of the refrigerating compartment, It is preferable to control the compressor to be driven and stopped based on the internal temperature value of the freezer compartment detected by the freezer compartment temperature detection sensor.

And a damper installed to open and close the refrigerating compartment air passage in the refrigerating compartment air passage communicating with the cooling air passage, wherein the control unit is configured such that an internal temperature value of the refrigerating compartment detected by the refrigerating compartment temperature detection sensor is the target temperature. When the condition is satisfied, it is effective to control the damper so that the cold air passage is blocked.

On the other hand, according to another field of the invention, the step of detecting the internal temperature of the refrigerator compartment; And controlling the compressor to drive and stop the compressor based on the detected internal temperature value of the refrigerating compartment.

Here, before the controlling of the compressor, the method may further include detecting an internal temperature of the freezer compartment, and if the detected internal temperature value of the refrigerating compartment satisfies a cooling temperature condition of the refrigerating compartment, the detected internal temperature of the freezer compartment It is preferable to control the compressor to be driven and stopped based on the value.

And, before the step of controlling the compressor, if the detected internal temperature value of the refrigerating compartment satisfies the target temperature conditions of the refrigerating compartment, it is effective to further include the step of blocking the air flow path flowing into the refrigerating compartment.

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

3 is a longitudinal sectional view of a refrigerator according to an embodiment of the present invention. As shown in the drawing, like the conventional refrigerator, the refrigerator 11 is hinged to the main body 11 and the main body 11 having the freezing chamber 13 and the refrigerating chamber 15 interposed therebetween with a partition wall 21 therebetween. 13) and a refrigerating chamber door 17 and a refrigerating chamber door 19 for opening and closing the refrigerating chamber 15, respectively. In the rear region of the freezing chamber 13, a shroud member 26 is installed to form a cooling air flow path 25a, and an air discharge port is formed in front of the shroud member 26 so as to communicate with the freezing chamber 13. The grill member 27 in which 28 is formed is provided so that a predetermined distance may be provided.

A compressor 31 is provided in the lower rear region of the main body 11, and a blowing fan 33 and an evaporator 29 are provided in the cooling air flow path 25a along the vertical direction. The partition wall 21 is provided with a freezer compartment return passage 23a and a refrigerator compartment return passage 23b, respectively, so that air from the freezing chamber 13 and the refrigerating chamber 15 can be returned / introduced into the cooling air passage 25a. A damper 35 is provided in the inlet region of the air passage 25b formed in the rear region of the refrigerating chamber 15 to block the inflow of air from the freezing chamber 13.

On the other hand, both side walls of the refrigerating chamber 15 is provided with a refrigerating chamber temperature detection sensor 37 so as to detect the internal temperature of the refrigerating chamber 15, the internal temperature of the freezing chamber 13 in the upper region of the freezer compartment (13). Freezer compartment temperature detection sensor 39 is provided to detect the.

4 is an electric circuit diagram of the refrigerator of FIG. 3. As shown, a freezer compartment temperature detection sensor 39 and a refrigerating compartment which detect respective internal temperatures of the freezer compartment 13 and the refrigerating compartment 15 are provided at an input terminal of the controller 41 in the form of a microcomputer with a built-in control program. The temperature detection sensor 37 is attached, respectively, and the blower fan 33, the compressor 31, and the damper 35 are connected to the output terminal via the first relay 43 and the second relay 45, respectively. . Here, each of R1 to R5 is a resistor, and IC2 is a diode portion.

By this structure, the control part 41 controls the 2nd relay 45 based on the internal temperature value of the refrigerator compartment 15 detected by the refrigerator compartment temperature detection sensor 37, and the damper 35 is carried out by the refrigerator compartment 15 The air flow path 25b of the air passage 25b is opened or blocked, and the first relay 43 is controlled so that the compressor 31 and the blower fan 33 are driven or stopped.

That is, when the refrigerating chamber 15 requires cooling, the second relay 45 is controlled so that the damper 35 opens the air flow path 25b of the refrigerating chamber 15, and the first relay 43 is controlled. Thus, the blowing fan 33 and the compressor 31 are driven.

The refrigerating chamber 15 satisfies the cooling temperature condition, and when only the freezing chamber 13 requires cooling, the second relay 45 is controlled so that the damper 35 blocks the air flow path 25b of the refrigerating chamber 15. In one state, the first relay 43 is controlled to drive the blower fan 33 and the compressor 31.

5 is a flowchart illustrating a temperature control method of the refrigerator according to the present invention. As shown, the controller 41 controls the refrigerator compartment temperature detection sensor 37 to detect the internal temperature of the refrigerator compartment 15 (S10). If the internal temperature value detected by the refrigerating compartment temperature detection sensor 37 is a difference from the cooling target temperature value of the refrigerating compartment 15 is greater than or equal to a predetermined value ΔT1 (S20), the second relay 45 is controlled to control the damper 35. ) To open the air flow path (25b) of the refrigerating chamber (15) (S30). Next, the first relay 43 is controlled to drive the compressor 31 and the blower fan 33 (S70).

On the other hand, when the difference between the internal temperature value of the refrigerating compartment 15 and the cooling target temperature value detected by the refrigerating compartment temperature detection sensor 37 is less than the predetermined value ΔT1 (S20), the controller 41 controls the freezer compartment temperature detection sensor ( 39 to control the internal temperature value of the freezer compartment 13 (S40). When the detected internal temperature value of the freezer compartment 13 is compared with the cooling target temperature value of the freezer compartment 13 and the difference is greater than or equal to the predetermined value ΔT2 (S50), the second relay 45 is controlled to control the damper 35. The air flow path 25b of the refrigerating chamber 15 is blocked (S60) and the first relay 43 is controlled to drive the blower fan 33 and the compressor 31 (S70).

When the difference between the detected internal temperature value of the freezing chamber 13 and the cooling target temperature value of the freezing chamber 13 is less than the predetermined value ΔT2 (S50), the second relay 45 is controlled to control the compressor 31 and the blowing air. The fan 33 is stopped (S80).

As described above, according to the present invention, by controlling the compressor to be driven or stopped based on the internal temperature value of the refrigerating compartment, it is possible to respond quickly to the temperature change of the refrigerating compartment, and to eliminate the outside temperature detection sensor, thereby eliminating parts cost and manufacturing labor. There is provided a refrigerator and its temperature control method to reduce the.

Claims (6)

A main body including a freezing compartment and a refrigerating compartment, and a cooling air flow path configured to cool the air in the freezing compartment and the refrigerating compartment while circulating; An evaporator disposed in the cooling air passage to cool air circulated; A compressor disposed on one side of the main body to compress the refrigerant circulated from the evaporator; At least one refrigerator compartment temperature detection sensor disposed in the refrigerator compartment and detecting an internal temperature of the refrigerator compartment; And a control unit controlling the compressor to be driven and stopped based on an internal temperature value of the refrigerating compartment detected by the refrigerating compartment temperature detection sensor. The method of claim 1, At least one freezer compartment temperature detection sensor disposed in the freezer compartment for detecting an internal temperature value of the freezer compartment, The control unit controls the compressor to be driven and stopped based on an internal temperature value of the freezer compartment detected by the freezer compartment temperature detection sensor when the temperature detection result of the refrigerating compartment satisfies the cooling temperature condition of the refrigerating compartment. Featured refrigerator. The method of claim 2, And a damper installed to open and close the refrigerating chamber air passage in the refrigerating chamber air passage communicating with the cooling air passage. And the control unit controls the damper to block the refrigerating chamber air flow path when the internal temperature value of the refrigerating chamber detected by the refrigerating chamber temperature detection sensor satisfies the target temperature condition. Detecting an internal temperature of the refrigerating compartment; And controlling the compressor to drive and stop the compressor based on the detected internal temperature value of the refrigerator compartment. The method of claim 4, wherein And before the controlling of the compressor, detecting the internal temperature of the freezer compartment, wherein the detected internal temperature value of the refrigerating compartment satisfies a cooling temperature condition of the refrigerating compartment. And controlling the compressor to be driven and stopped based on the temperature control method of the refrigerator. The method of claim 5, And before the controlling of the compressor, when the detected internal temperature value of the refrigerating compartment satisfies a target temperature condition of the refrigerating compartment, blocking the air flow path flowing into the refrigerating compartment. How to adjust.