KR100756881B1 - Defrost heat cut device and method of refrigerator - Google Patents

Abstract

The present invention relates to a defrost heat blocking device and method of a refrigerator for blocking heat of a defrost heater from being introduced into a freezing compartment through an inlet formed at a lower portion of a main cold air duct, comprising: a sliding bar mounted to be slidable from the upper side of the intake port; A suction port cover mounted at a lower end of the sliding bar to open and close the suction port according to left and right sliding of the sliding bar; A rotating plate positioned adjacent to the sliding bar; A motor for driving the rotating plate to rotate; A motor driver for driving the motor; And a link connecting the sliding bar and the rotating plate to transmit the driving force of the motor to the sliding bar, thereby preventing food from being deteriorated in the freezer compartment and minimizing a rise in temperature in the freezer compartment, thereby reducing power consumption. It works.

Description

Apparatus and method for interception of defrosting heat in refrigerator}

1 is a side cross-sectional view showing an upper portion of the main cold air duct of the refrigerator according to the prior art.

Figure 2 is a schematic diagram showing a defrost heat cut device of the refrigerator according to the present invention.

Figure 3 is a block diagram showing a control system of the defrost heat cut device of the refrigerator according to the present invention.

4 is a view showing an operation example of a defrost heat cut device of the refrigerator of FIG.

5 is a view showing another embodiment of a defrost heat cut device of the refrigerator according to the present invention.

6 is a flowchart illustrating a method of blocking defrost heat of a refrigerator according to the present invention;

-Explanation of symbols for the main parts of the drawing-

10: freezer compartment 20: main cold air duct

30: evaporator 40: blower fan

50: defrost heater 60: louver insulation

65: cold air inlet 70: louver

75: cold air inlet 80: inlet

110: sliding bar 120: inlet cover

130: rotating plate 140: motor

150: motor drive unit 160: link

170: opening and closing hole 200: control unit

The present invention relates to a defrost heat blocking apparatus and method of the refrigerator, and more particularly, to a defrost heat blocking apparatus and method of the refrigerator that can selectively open and close the suction port to block the defrost heat flowing into the freezer compartment.

In general, a refrigerator is provided with components of a refrigeration cycle, such as a compressor, a condenser, an evaporator, and an expansion valve, and cold air generated therefrom is supplied to a storage compartment to maintain a freshness of various foods for a long time.

In the refrigerator, during the cooling operation, moisture in the air brought into the freezer compartment from the inside of the refrigerator is formed on the surface of the evaporator, which degrades the heat exchange performance or hinders the flow of air. By removing the frost formed on the evaporator is controlled to improve the efficiency of the refrigerator.

1 is a side cross-sectional view illustrating an upper portion of a main cold air duct of a refrigerator according to the related art, and as shown in FIG. 1, in the main cold air duct 20 formed at the rear of the freezing compartment 10, ambient temperature is circulated through circulation of cold refrigerant. An evaporator 30 for cooling is installed, and a blowing fan 40 for introducing cold air cooled by the evaporator 30 to the inside of the freezing chamber 20 is provided, and a lower side of the evaporator 30 is provided. Defrost heater 50 for removing frost generated by the moisture in the air flowing into the freezer compartment 10 is formed on the surface of the evaporator 30 is installed.

In addition, the upper portion of the louver insulator 60 constituting the inside of the main cold air duct 20 has a cold air inlet 65 through which the cold air supplied by the blowing fan 40 flows into the freezing compartment 20. In addition, a cold air inlet 75 is formed at an upper portion of the louver 70 positioned in front of the louver insulator 60 to form a rear wall of the freezer compartment 10 to exchange heat with the evaporator 30 of the main cold air duct 20. The cold cold air is introduced into the freezer compartment 10 through the cold air inlets 65 and 75 formed in the louver insulator 60 and the louver 70 by the blowing fan 40.

In addition, a suction port 80 is formed at the lower portion of the freezing compartment 10 to allow the air circulated inside the freezing compartment 10 to be sucked back into the main cold air duct 20.

On the other hand, the defrost heater 50 installed on the lower side of the evaporator 30 is periodically operated during the refrigerant cycle for cooling the inside of the refrigerator for a predetermined time to be implanted in the evaporator 30 or the main cold air duct 20. By removing the frost, the cooling efficiency of the refrigerator is improved.

In the conventional refrigerator as described above, unlike a circulating operation of a general refrigeration cycle in which cold air returned to the main cold air duct 20 is exchanged by circulating refrigerant passing through the evaporator 30, frost formed on the evaporator 30 is reduced. When the defrost heater 50 is operated to remove, heat generated by the defrost heater 50 is introduced into the freezer compartment 10 by driving the blower fan 40 through the cold air inlets 65 and 75. In order not to stop the operation of the blower fan (40).

However, the defrost heat is introduced into the suction port 80 through the suction port 80 located at the lower side of the main cold air duct 20 adjacent to the defrost heater 50 to increase the temperature inside the freezer compartment 10, thereby freezing the chamber. (10) There is a problem that the food is deteriorated by raising the temperature of the food stored therein.

In addition, since much power consumption is used to cool the elevated interior as described above, more power consumption is required.

The present invention has been made in order to solve the above problems, by selectively opening and closing the suction port to block defrost heat flowing into the freezer compartment, it is possible to prevent the food inside the freezer from deterioration, and to increase the temperature in the freezer compartment It is an object of the present invention to provide a defrost heat shield device and method of the refrigerator that can reduce the power consumption by minimizing.

The present invention relates to a defrost heat cut-off device of a refrigerator mounted on an inlet formed at a lower portion of a main cold air duct to block heat from a defrost heater from being introduced into a freezer compartment, comprising: a sliding bar mounted to be slidable from the top of the intake port; A suction port cover mounted at a lower end of the sliding bar to open and close the suction port according to left and right sliding of the sliding bar; A rotating plate positioned adjacent to the sliding bar; A motor for driving the rotating plate to rotate; A motor driver for driving the motor; And a link connecting the sliding bar and the rotating plate to transmit the driving force of the motor to the sliding bar.

Preferably, the control unit for outputting a control signal to the motor drive unit to drive the motor in accordance with the operation of the defrost heater further comprises.

More preferably, the control unit causes the motor to rotate forward when the defrost heater is operated so that the inlet cover closes the inlet port, and when the defrost heater is stopped, the motor rotates in reverse so that the inlet cover is closed. And outputting a control signal to the motor driver to open the suction port.

In addition, the present invention is a defrost heat blocking device of the refrigerator mounted on the inlet formed in the lower portion of the main cold air duct to block the heat of the defrost heater into the freezer compartment, the opening and closing hole is formed to open and close the intake port, A sliding bar mounted to be slidable from the front to left and right; A rotating plate positioned adjacent to the sliding bar; A motor for driving the rotating plate to rotate; A motor driver for driving the motor; And a link connecting the sliding bar and the rotating plate to transmit the driving force of the motor to the sliding bar.

Preferably, the control unit for outputting a control signal to the motor drive unit to drive the motor in accordance with the operation of the defrost heater further comprises.

More preferably, the control unit causes the motor to rotate forward when the defrost heater is operated so that the sliding bar closes the suction port, and when the defrost heater stops, the motor rotates backward so that the sliding bar opens the suction port. And outputting a control signal to the motor driver to open.

In another aspect, the present invention provides a method for blocking defrost heat of a refrigerator mounted on a suction port formed under a main cold air duct to block heat from a defrost heater from flowing into a freezer compartment, the control unit comprising: determining whether a defrost heater is operated; If the defrost heater is operated, the controller outputs a control signal to a motor driving unit to drive the motor to rotate forwardly as a result of the determination of the controller; Rotating the rotating plate connected to the motor in a clockwise direction by the forward rotation driving of the motor to slide the sliding bar connected to the rotating plate and the link to the right to close the suction port; Determining, by the controller, whether the defrost heater is stopped; If the defrost heater is stopped, the controller outputs a control signal to a motor driving unit to drive the motor in reverse rotation; And rotating the rotating plate connected to the motor counterclockwise by the reverse rotation driving of the motor to slide the sliding bar connected to the rotating plate and the link to the left to open the suction port.

Therefore, by selectively opening and closing the suction port to block defrost heat from flowing into the freezer compartment, it is possible to prevent the food inside the freezer from deterioration, and to minimize the temperature rise in the freezer compartment, thereby reducing power consumption. .

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the defrost heat shield of the refrigerator according to the present invention.

2 is a block diagram schematically showing a defrost heat cut device of the refrigerator according to the present invention, Figure 3 is a block diagram showing a control system of the defrost heat cut device of the refrigerator according to the present invention, Figures 1, 2 and Referring to 3, an evaporator 30 is disposed in the main cold air duct 20 behind the freezer compartment 10 to cool the surrounding temperature through circulation of cold refrigerant, and a freezer compartment 10 is located below the evaporator 30. Defrost heater 50 is installed to remove frost generated by the moisture in the air flowing into the) is formed on the surface of the evaporator (30).

In addition, the defrost heater 50 is mounted on the front lower side of the defrost heater 50 adjacent to the defrost heater 50, specifically, the defrost heat cut device is the cold air circulated inside the freezing chamber 10 again the main cold air It is mounted on the inlet 80 to be sucked into the duct 20 to open and close the inlet 80.

The defrost heat blocking device is mounted on the sliding bar 110 to be slidable in the left and right directions from the upper portion of the suction port 80, and is mounted on the lower end of the sliding bar 110 according to the left and right sliding of the sliding bar 110. A flap-shaped suction port cover 120 for opening and closing the suction port 80, a rotation plate 130 adjacent to the sliding bar 110, and a connection to the rotation plate 130 so that the rotation plate 130 rotates. And drive the motor 140, the motor driving unit 150 allowing the motor 140 to be driven, and the driving force of the motor 140 to the sliding bar 110. It is configured to include a link 160 for connecting the 130.

In addition, the control unit 200 for controlling the driving of the motor 140 by outputting a control signal to the motor driving unit 150 to drive the motor 140 in accordance with the start or stop operation of the defrost heater (50). It is configured to include more.

Referring to FIG. 2, a plurality of suction ports 80 are formed at the lower side of the main cold air duct 20 in the transverse direction so that the cold air circulating inside the freezing compartment 10 flows back into the main cooling duct 20. Is, the sliding bar 110 is mounted on the upper portion of the plurality of suction ports 80 to slide left and right, the suction port cover 120 slightly larger than the size of the suction port 80 at the lower end of the sliding bar (110). A plurality of are mounted side by side.

In addition, the rotating plate 130 is connected to the sliding bar 110 by the link 160 on the adjacent side of the sliding bar 110, the link 160 is driven by the motor 140 of the rotating plate ( When the 130 is rotated, the driving force of the motor 140 is transmitted to the sliding bar 110 so that the sliding bar 110 is slid to the right or left side, and thus, the suction port mounted at the lower end of the sliding bar 110. The cover 120 allows the intake port 80 to be opened and closed.

In this case, when the defrost heater 50 is operated, the control unit 200 outputs a control signal to the motor driving unit 150 so that the inlet cover 120 closes the inlet 80. To rotate forward. That is, as shown in FIG. 4, the sliding bar 110 slides to the right to drive the motor 140 to close the suction port 80.

On the contrary, the control unit 200 outputs a control signal to the motor driving unit 150 so that the inlet cover 120 opens the inlet 80 when the defrost heater 50 that is in operation stops the motor ( 140) is reversed. That is, as shown in FIG. 2, the sliding bar 110 slides to the left to drive the motor 140 to open the suction port 80.

On the other hand, Figure 5 is a view showing another embodiment of the defrost heat cut device of the refrigerator according to the present invention, as shown, the sliding bar 110 is mounted to be slidable from side to side in front of the suction port 80 and Is formed in the sliding bar 110, the opening and closing hole 170 to open and close the suction port 80 in accordance with the movement of the sliding bar 110, and the rotating plate 130 adjacent to the sliding bar 110 And a motor 140 connected to the rotating plate 130 so as to rotate the rotating plate 130, and a driving force of the motor driving unit 150 and the motor 140 to drive the motor 140. It is configured to include a link 160 for connecting the sliding bar 110 and the rotating plate 130 to the sliding bar 110.

In addition, the control unit 200 for controlling the driving of the motor 140 by outputting a control signal to the motor 140 driving unit so that the motor 140 is driven in accordance with the start or stop operation of the defrost heater (50). It is configured to include more.

Specifically, a plurality of suction ports 80 for introducing cold air circulating inside the freezing compartment 10 back into the main cooling duct 20 are formed in the transverse direction in the lower side of the main cooling air duct 20. The sliding bar 110 is mounted on the front surface of the suction port 80 to open and close the plurality of suction ports 80 so as to slide left and right, and the opening and closing slightly larger than the size of the suction port 80 on the sliding bar 110. A plurality of balls 170 are mounted side by side.

In addition, similar to the above-described embodiment, the rotating plate 130 is connected to the sliding bar 110 by the link 160 on the adjacent side of the sliding bar 110, the link 160 is a motor 140 When the rotating plate 130 is rotated by driving, the driving force of the motor 140 is transmitted to the sliding bar 110 so that the sliding bar 110 is slid to the right or left side, thereby the sliding bar 110. Opening and closing hole 170 formed in the) to open and close the suction port (80).

In this case, when the defrost heater 50 is operated, the control unit 200 outputs a control signal to the motor driving unit 150 so that the sliding bar 110 closes the suction port 80. To rotate forward. That is, the sliding bar 110 is slid to the right so that the opening and closing hole 170 and the suction port 80 do not overlap, thereby driving the motor 140 to close the suction port 80.

On the contrary, the control unit 200 outputs a control signal to the motor driving unit 150 so that the sliding bar 110 opens the suction port 80 when the defrost heater 50 which is in operation is stopped. Allow 140 to reverse. That is, the sliding bar 110 is slid to the left side so that the opening and closing hole 170 and the suction port 80 are overlapped, thereby driving the motor 140 to open the suction port 80.

Hereinafter, a method for blocking defrost heat of a refrigerator according to the present invention will be described with reference to the drawings.

6 is a flowchart illustrating a method for blocking defrost heat of a refrigerator according to the present invention. As shown in the drawing, the controller 200 determines whether the defrost heater 50 is operated (S100), and the determination result is When the defrost heater 50 is operated, a control signal is output to the motor driver 150 to drive the motor 140 to forward rotation (S200).

When the motor 140 is driven to rotate forward, the rotating plate 130 connected to the motor 140 rotates clockwise to slide the sliding bar 110 connected to the rotating plate 130 and the link 160 to the right. By moving the inlet cover 120 to the right side, the inlet port 80 allowing the cold air circulated in the freezer compartment 10 to flow back into the main cold air duct 20 is closed (S300).

Therefore, it is possible to prevent the heat generated by the operation of the defrost heater 50 is introduced into the freezer compartment 10 through the suction port 80 to adversely affect the food stored in the freezer compartment 10.

Thereafter, the controller 200 determines whether the operation of the defrost heater 50 is stopped (400). If the operation of the defrost heater 50 is stopped, the controller 200 sends a control signal to the motor driver 150. It outputs and drives the motor 140 to rotate in reverse (S500).

When the motor 140 is driven to rotate in reverse, the rotating plate 130 connected to the motor 140 rotates counterclockwise to move the sliding bar 110 connected to the rotating plate 130 and the link 160 to the left. By sliding the inlet cover 120 to the left side, the inlet port 80 allowing the cold air circulating in the freezer compartment 10 to flow back into the main cold air duct 20 is opened (S600).

Although the embodiments of the present invention illustrated in FIGS. 2 and 3 have been described so far, it will be apparent that other embodiments of the present invention described with reference to FIG. 5 operate in the same manner as described above.

In conclusion, the defrost heat blocking device and method of the refrigerator according to the present invention has a suction port 80 to allow the cold air circulating in the freezer compartment 10 to be introduced into the main cold air duct 20 to the operating state of the defrost heater 50. By selectively opening and closing accordingly, it is possible to prevent the inflow of heat generated by the defrost heater 50 into the freezer compartment 10.

The defrost heat blocking device and method of the refrigerator according to the present invention, as described above, by selectively opening and closing the inlet for allowing the cold air circulated in the freezer again into the main cold air duct to block defrost heat into the freezer compartment, There is an effect that can prevent the food in the freezer deterioration.

In addition, the present invention has the effect of reducing the power consumption by preventing the defrost heat is introduced into the freezer compartment as described above to minimize the temperature rise in the freezer compartment.

Claims (7)

A defrost heat cutoff device of a refrigerator mounted on an inlet formed under a main cold air duct to block heat from a defrost heater from entering a freezer compartment. A sliding bar mounted to be slidable from the top of the suction port to the left and right; A suction port cover mounted at a lower end of the sliding bar to open and close the suction port according to left and right sliding of the sliding bar; A rotating plate positioned adjacent to the sliding bar; A motor for driving the rotating plate to rotate; A motor driver for driving the motor; And And a link connecting the sliding bar and the rotating plate to transmit the driving force of the motor to the sliding bar. The method of claim 1, And a control unit for outputting a control signal to the motor driving unit to drive the motor according to the operation of the defrost heater. The method of claim 2, The control unit causes the motor to rotate forward when the defrost heater is operated such that the inlet cover closes the inlet port, and when the defrost heater is stopped, the motor is reversed so that the inlet cover opens the inlet port. Defrost heat cut device of the refrigerator, characterized in that for outputting a control signal to the motor drive unit. A defrost heat cutoff device of a refrigerator mounted on an inlet formed under a main cold air duct to block heat from a defrost heater from entering a freezer compartment. An opening and closing hole formed to open and close the inlet, and a sliding bar mounted to be slidable from the front of the inlet to the left and right; A rotating plate positioned adjacent to the sliding bar; A motor for driving the rotating plate to rotate; A motor driver for driving the motor; And And a link connecting the sliding bar and the rotating plate to transmit the driving force of the motor to the sliding bar. The method of claim 4, wherein And a control unit for outputting a control signal to the motor driving unit to drive the motor according to the operation of the defrost heater. The method of claim 5, The control unit causes the motor to rotate forward when the defrost heater is operated so that the sliding bar closes the suction port, and when the defrost heater is stopped, the motor rotates to reverse the motor so that the sliding bar opens the suction port. Defrost heat cut device of the refrigerator, characterized in that for outputting a control signal. A method of blocking defrost heat of a refrigerator mounted on a suction port formed under a main cold air duct to block heat from a defrost heater from entering a freezer compartment. Determining, by the controller, whether the defrost heater is operated; If the defrost heater is operated, the controller outputs a control signal to a motor driving unit to drive the motor to rotate forwardly as a result of the determination of the controller; Rotating the rotating plate connected to the motor in a clockwise direction by the forward rotation driving of the motor to slide the sliding bar connected to the rotating plate and the link to the right to close the suction port; Determining, by the controller, whether the defrost heater is stopped; If the defrost heater is stopped, the controller outputs a control signal to a motor driving unit to drive the motor in reverse rotation; And And rotating the rotating plate connected to the motor counterclockwise by the reverse rotation driving of the motor to slide the sliding bar connected to the rotating plate and the link to the left to open the suction port.

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