KR100885583B1 - Refrigerator - Google Patents

Abstract

A refrigerator is provided to reduce power consumption by remove frost from an evaporator by refrigerant discharged from a compressor at high temperature without using any additional defrosting heater. A valve element(100) has an inlet for introducing refrigerant discharged from a compressor(10), a first outlet for discharging the refrigerant to a condenser(20) via a condenser suction side pipe(61b) and a second outlet for discharging the refrigerant to a bypass pipe(70), wherein the first outlet has a diameter larger than the second outlet and the second outlet has a diameter smaller than that of the condenser suction side pipe.

Description

Refrigerator {Refrigerator}

This embodiment relates to a refrigerator.

In general, a refrigerator is a device for supplying cold air to a freezer compartment and a refrigerating compartment by a refrigeration system so that food is stored at a low temperature.

The refrigeration system then consists of a compressor-condenser-expander-evaporator. Then, the air changes to a low temperature state while passing through the evaporator and is supplied to the freezer compartment and the refrigerating compartment.

The cold air circulated in the freezer compartment and the refrigerating compartment is moved to the heat exchange chamber in which the evaporator is installed again through a predetermined path.

At this time, the moisture contained in the air circulating inside the refrigerator is formed on the surface of the evaporator by contact with the evaporator and grows to frost.

A large amount of frost that grows in this way not only has a great effect on the heat exchange efficiency of the evaporator, but also adversely affects the passage of air passing through the evaporator. It will drive.

When the defrosting operation is performed, power is applied to the defrosting heater, and frost formed on the surface of the evaporator adjacent to the defrosting heater is melted by the heat of the defrosting heater, and gradually the heat of the defrosting heater is It is delivered to the top to gradually melt the frost formed on the surface of the evaporator to be removed.

However, in the case of using the defrost heater as described above, since a separate power is supplied to the defrost heater, power consumption is large, and the temperature inside the refrigerator is increased by the heat of the defrost heater.

In addition, since the defrost heater is provided on either side of the evaporator to heat only a part of the evaporator, there is a problem that the defrost time takes a lot.

The present embodiment is proposed to solve the above problems, and an object of the present invention is to propose a refrigerator in which a defrost time is shortened and a temperature rise in a refrigerator is prevented during the defrosting process.

Another object of the present embodiment is to propose a refrigerator in which frost removed from an evaporator blocks a discharge opening formed in a tray.

Refrigerator according to an embodiment for achieving the above object, the compressor; A condenser for condensing the refrigerant discharged from the compressor; An expansion valve to expand the refrigerant condensed in the condenser; An evaporator for evaporating the expanded refrigerant in the expansion valve; A bypass pipe to allow the refrigerant discharged from the compressor to move toward the evaporator inlet; And a valve device for selectively moving the refrigerant discharged from the compressor to the bypass pipe or the condenser. Condenser suction side pipe for moving the refrigerant discharged from the compressor to the condenser side, and the valve device is a first inlet for the refrigerant discharged from the compressor flows in, the first refrigerant to discharge the introduced refrigerant to the condenser side And a discharge port, and a second discharge port for discharging to the bypass pipe, wherein the diameter of the first discharge port is larger than the diameter of the second discharge port, and the diameter of the condenser suction side pipe is the diameter of the bypass pipe. It is characterized in that it is formed larger.

Refrigerator according to another aspect, the compressor; A condenser for condensing the refrigerant discharged from the compressor; An expansion valve to expand the refrigerant condensed in the condenser; A plurality of evaporators for evaporating the refrigerant expanded in the expansion valve; A plurality of bypass pipes for allowing the refrigerant discharged from the compressor to move toward the inlet of each evaporator; A valve device to selectively move the refrigerant discharged from the compressor to the bypass pipe or the condenser; And a condenser suction side pipe for allowing the refrigerant passing through the valve device to move to the condenser side, wherein the diameter of the condenser suction side pipe is larger than the diameter of each bypass pipe.

According to the proposed embodiment, since the frost formed on the evaporator can be removed by a high temperature refrigerant discharged from the compressor without a separate defrost heater, power consumption can be reduced as compared with the related art.

In addition, since the high-temperature refrigerant passing through the compressor moves along the inside of the evaporator, there is an advantage that can quickly remove the frost formed on the entire evaporator.

In addition, by adjusting the size of the inlet and outlet of the valve device, there is an advantage that the flow path resistance of the refrigerant is minimized during normal operation of the refrigerator.

In addition, since a portion of the bypass pipe is located adjacent to the tray in which the defrost water falls, there is an advantage that the phenomenon that the frost is blocked in the discharge port formed in the tray is prevented.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a configuration diagram showing a refrigeration system of a refrigerator according to a first embodiment.

Referring to FIG. 1, a refrigerator 1 equipped with a refrigeration system according to the present embodiment includes a compressor 10 compressing a refrigerant, and a condenser condensing the refrigerant compressed at a high temperature and high pressure by the compressor 10. 20, an expansion valve 30 for expanding the condensation refrigerant passing through the condenser 20, an evaporator 40 for evaporating the refrigerant passing through the expansion valve 30, the evaporator 40 and the compressor ( And a gas-liquid separator 50 provided between the liquid crystal refrigerant and the gaseous refrigerant passing through the evaporator 40.

In detail, the compressor 10 and the condenser 20 are connected by a first connection pipe 61. In addition, the expansion valve 30 and the evaporator 40 are connected by a second connection pipe 62.

In addition, the first connection pipe 61 and the second connection pipe 62 are connected by a bypass pipe 70. In addition, when the defrosting of the evaporator 40 is required, the bypass pipe 70 may have a high temperature refrigerant discharged from the compressor 10 at the inlet side of the evaporator 40, that is, the second connection pipe 62. It provides a passageway to be moved to.

In addition, the first connection pipe 61 is provided with a valve device 100 to selectively enter the high temperature refrigerant discharged from the compressor 10 into the bypass pipe 70. In addition, a three-way valve may be used as the valve device 100.

Here, the first connection pipe 60 may be divided into a compressor discharge side pipe 61a and a condenser suction side pipe 61b based on the valve device 100. The compressor discharge side pipe 61a may be connected to the condenser suction side pipe 61b or may be connected to the bypass pipe 70 by the operation of the valve device 100.

The operation of the refrigerator 1 by the above-described configuration will be described.

When the refrigerator is operating normally, the compressor discharge side pipe 61a and the condenser suction side pipe 61b communicate with each other by the valve device 100.

When the refrigerator operates in this state, the refrigerant is compressed while passing through the compressor 10. The compressed refrigerant flows into the condenser 20 through the compressor discharge side pipe 61a and the condenser suction side pipe 61b. In addition, the refrigerant introduced into the condenser 20 is condensed while passing through the condenser 20. Then, the condensed refrigerant is introduced into the expansion valve 30, the refrigerant introduced into the expansion valve 30 is expanded while passing through the expansion valve (30). In addition, the expanded refrigerant is introduced into the evaporator 40, and the refrigerant introduced into the evaporator 40 is evaporated while passing through the evaporator 40. The vaporized refrigerant passes through the gas-liquid separator 50 to separate the liquid phase and the gaseous phase, and the refrigerant in the separated gas phase flows into the compressor 10.

Then, the air blown by the blowing fan (not shown) is heat-exchanged while passing through the evaporator 40 to be a low temperature state and then supplied to the freezer compartment and the refrigerating compartment.

As described above, frost is generated in the evaporator 40 while the air is heat-exchanged while passing through the evaporator 40. And, if a certain amount of frost is generated, the frost should be removed. In this case, the refrigerator is defrosted.

When the refrigerator performs defrosting operation, the compressor discharge side pipe 61a and the bypass pipe 70 communicate with each other by the valve device 100. Then, the high temperature refrigerant discharged from the compressor 10 does not flow into the condenser 20, but moves to the second connection pipe 62 along the bypass pipe 70. In addition, the high temperature refrigerant moved to the second connection pipe 62 flows into the evaporator 40. Then, frost generated in the evaporator 40 is removed in the process of moving the high temperature refrigerant introduced into the evaporator 40.

According to this embodiment, since the frost formed on the evaporator 40 can be removed without a separate defrost heater, it is possible to obtain an advantage that the power consumption can be reduced compared to the prior art. In addition, since the refrigerant passing through the compressor 10 moves along the inside of the evaporator 40, there is an advantage that the frost formed on the entire evaporator 40 can be quickly removed.

FIG. 2 is a diagram for illustrating a formation position of a bypass pipe. FIG.

2, a heat exchange chamber 80 in which an evaporator 40 is located is provided at the rear side of the refrigerator according to the present embodiment. In addition, a tray 82 is formed below the evaporator 40 in which defrost water generated by frost is recorded in the evaporator 40, and the tray 82 is disposed at the center of the tray 82. An outlet 84 for discharging the defrosted water that is dropped is formed.

In this case, the tray 82 and the discharge port 84 may be formed in the heat exchange chamber 80, and a defrost water receiver (not shown) receiving defrost water may be further provided below the discharge port 84. have.

A portion of the bypass pipe 70 is located between the evaporator 40 and the tray 82, preferably adjacent to the tray 82.

In detail, when the high temperature refrigerant bypassed by the bypass pipe 70 flows through the evaporator 40, the frost generated in the evaporator 40 is melted by the high temperature refrigerant. In this case, the frost melts and flows down or falls to the tray 82 while the frost is agglomerated. In this case, when the frost falls to the tray 82 in a lump, the dropped frost may block the discharge port 84.

Therefore, in the present embodiment, a portion of the bypass pipe 70 is positioned adjacent to the tray 82, so that the temperature dropped to the tray 82 by the high temperature refrigerant passing through the bypass pipe 70. Allow it to melt. In this case, the outlet 84 is blocked.

3 is a view schematically showing the internal structure of a valve device according to the first embodiment.

Referring to FIG. 3, in the present embodiment, a three-way valve may be used as the valve device 100 as described above. The three-way valve may include an inlet port 102 through which the refrigerant discharged from the compressor 10 flows in, and a first outlet port through which the refrigerant introduced through the inlet port 102 is discharged to the condenser suction side pipe 61b. 104 and a second discharge port 106 for discharging to the bypass pipe 70 is formed.

In detail, the diameters of the inlet 102 and the first outlet 104 are the same. The diameter of the second discharge port 106 is smaller than the diameter of the inlet 102 and the first discharge port 104.

In general, the diameters of the two discharge ports in the three-way valve are formed to be the same, but in this case, the flow resistance becomes larger than the case where the three-way valve does not exist when the refrigerator is normally operated. In this way, when the flow path resistance is increased, the efficiency of the refrigeration cycle is lowered, thereby increasing the power consumption.

Therefore, in this embodiment, the diameter of the inlet 102 and the first outlet 104 is larger than the second outlet 106 so that the flow path resistance of the refrigerant is minimized during normal operation of the refrigerator.

Here, since the diameter of the first discharge port 104 is formed larger than the diameter of the second discharge port 106, the diameter of the condenser suction side pipe (61b) is to be formed larger than the diameter of the bypass pipe (70). Can be.

4 is a configuration diagram showing a refrigeration system according to a second embodiment.

The present embodiment is the same as the first embodiment in other parts, except that there are differences in the number of evaporators and the number of bypass pipes.

Referring to FIG. 4, the refrigeration system according to the present embodiment includes a compressor 10, a condenser 20, a plurality of evaporators 42 and 44, and the same number of expansion valves 32 and 34 as the evaporators 42 and 44. And a plurality of bypass pipes 72 and 74 allowing the refrigerant discharged from the compressor 10 to flow into the evaporators 42 and 44.

In detail, the evaporator includes a freezing compartment evaporator 42 and a refrigerating compartment evaporator 44, wherein the expansion valve includes a first expansion valve 32 for expanding a refrigerant for entering the freezing chamber evaporator 42; A second expansion valve 34 for expanding the refrigerant for entering the refrigerator compartment evaporator 44 is included.

The bypass pipe includes a first bypass pipe 72 for moving a high temperature refrigerant discharged from the compressor 10 to an inlet side of the freezing chamber evaporator 42, and the first bypass pipe 72. The second bypass pipe 74 is branched from, and the high temperature refrigerant is moved to the inlet side of the refrigerating chamber evaporator 44.

In addition, a three-way valve 90 is provided between the condenser 20 and the evaporators 42 and 44 to determine a flow direction of the refrigerant condensed in the condenser 20, and the compressor 10 and the condenser ( Between 20) includes a valve device 100 to selectively enter the hot refrigerant discharged from the compressor 10 into the bypass pipe (72, 74). At this time, a three-way valve is used as the valve device.

By the above-described configuration, first, when the freezer compartment cycle is operated, the refrigerant compressed in the compressor 10 is condensed while passing through the condenser 20. In addition, the refrigerant discharged to the condenser 20 flows into the first expansion valve 32 by the operation of the three-way valve 90.

The refrigerant introduced into the first expansion valve 32 is expanded while passing through the first expansion valve 32 and introduced into the freezing chamber evaporator 42. The refrigerant evaporated in the freezer compartment evaporator 42 flows into the gas-liquid separator 50, and the refrigerant in the gas phase flows into the compressor 10 from the refrigerant introduced into the gas-liquid separator 50.

On the other hand, when the refrigerating chamber cycle is operated, the refrigerant compressed in the compressor 10 is condensed while passing through the condenser 20. In addition, the refrigerant discharged to the condenser 20 flows into the second expansion valve 34 by the operation of the three-way valve 90.

In addition, the refrigerant introduced into the second expansion valve 34 is expanded while passing through the second expansion valve 34 and introduced into the refrigerator compartment evaporator 44. The refrigerant evaporated in the refrigerating chamber evaporator 44 flows into the gas-liquid separator 50, and the refrigerant in the gas phase flows into the compressor 10 from the refrigerant introduced into the gas-liquid separator 50.

On the other hand, when the refrigerator is defrosted, the high temperature refrigerant compressed by the compressor 10 is transferred to the first bypass pipe 72 and the second bypass pipe 74 by the operation of the valve device 100. The high temperature refrigerant introduced into each of the bypass pipes 72 and 74 flows into each of the evaporators 42 and 44. Then, frost generated in each of the evaporators 42 and 44 is removed by the high temperature refrigerant introduced into each of the evaporators 42 and 44.

According to the present embodiment as described above, the frost generated in each of the evaporators 42 and 44 can be simultaneously removed by the high temperature refrigerant discharged from the compressor 10.

Here, the first bypass pipe 72 provides a passage through which a high temperature refrigerant flows to the freezer compartment evaporator, and the second bypass pipe 74 is branched from the first bypass pipe 72. As described, it may be configured in reverse.

In the present embodiment has been described a case where a pair of evaporator is provided, the number of the evaporator is not limited, even when three or more evaporators are provided can be defrost of the evaporator by the same structure as described above Of course.

1 is a configuration diagram showing a refrigeration system of a refrigerator according to a first embodiment.

2 is a view for showing the formation position of the bypass pipe.

3 schematically shows the internal structure of a valve device according to the first embodiment;

4 is a block diagram showing a refrigeration system according to a second embodiment.

Claims (6)

compressor; A condenser for condensing the refrigerant discharged from the compressor; An expansion valve to expand the refrigerant condensed in the condenser; An evaporator for evaporating the expanded refrigerant in the expansion valve; A bypass pipe to allow the refrigerant discharged from the compressor to move toward the evaporator inlet; And A valve device to selectively move the refrigerant discharged from the compressor to the bypass pipe or the condenser; Condenser suction side piping for allowing the refrigerant discharged from the compressor to move to the condenser side, The valve device includes an inlet port through which the refrigerant discharged from the compressor flows in, a first discharge port through which the introduced refrigerant is discharged to the condenser side, and a second discharge port through the bypass pipe, The diameter of the first discharge port is formed larger than the diameter of the second discharge port, characterized in that the diameter of the condenser suction side pipe is formed larger than the diameter of the bypass pipe. The method of claim 1, The diameter of the inlet is formed larger than the diameter of the second outlet. The method of claim 1, Below the evaporator is provided a tray in which defrost water falls, A portion of the bypass piping is located adjacent to the tray. compressor; A condenser for condensing the refrigerant discharged from the compressor; An expansion valve to expand the refrigerant condensed in the condenser; A plurality of evaporators for evaporating the refrigerant expanded in the expansion valve; A plurality of bypass pipes for allowing the refrigerant discharged from the compressor to move toward the inlet of each evaporator; A valve device to selectively move the refrigerant discharged from the compressor to the bypass pipe or the condenser; And Condenser suction side piping for allowing the refrigerant passing through the valve device is moved to the condenser side, And a diameter of the condenser suction side pipe is larger than a diameter of each bypass pipe. The method of claim 4, wherein The bypass pipe, the first bypass pipe, And at least one second bypass pipe branched from the first bypass pipe. The method of claim 4, wherein The valve device includes an inlet through which the refrigerant discharged from the compressor flows in; A first discharge port through which the introduced refrigerant is discharged into the condenser suction side pipe, and a second discharge port through which the refrigerant flows through the bypass pipe, The refrigerator and the diameter of the first outlet and the inlet is formed larger than the diameter of the second outlet.

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