KR20130027289A - An air conditioner - Google Patents

Abstract

PURPOSE: An air conditioner is provided to improve super-cooling efficiency by increasing an area for heat exchange, and to enhance the operation efficiency of a refrigeration cycle by securing a sufficient super-cooling. CONSTITUTION: An air conditioner includes a compressor, a condenser, a super-cooling apparatus(100), an evaporator, a first flow path, a second flow path, and a third flow path. The first flow path formed inside the super-cooling apparatus guides a refrigerant, which passes through the condenser, to flow in the evaporator. The second flow path exchanges heat with the first flow path inside the super-cooling apparatus. The refrigerant flows in the compressor through the second flow path. The third flow path exchanges heat with the first flow path, and guides the refrigerant, which passes through the evaporator, to be sucked into the compressor.

Description

An air conditioner

The present invention relates to an air conditioner.

The air conditioner is an appliance for keeping the indoor air in the most suitable condition according to the purpose and purpose. For example, in the summer, the room is controlled by a cool air condition, while in winter the room is controlled by a warm heating condition, by the humidity of the room, and by the clean air of the room.

In detail, the air conditioner is driven by a refrigeration cycle that performs the compression, condensation, expansion and evaporation process of the refrigerant, thereby performing the cooling or heating operation of the indoor space.

Such an air conditioner may be classified into a separate type air conditioner that separates the indoor unit and the outdoor unit, and an integrated air conditioner that combines the indoor unit and the outdoor unit into one device, depending on whether the indoor unit and the outdoor unit are separated.

The outdoor unit includes an outdoor heat exchanger that exchanges heat with outside air, and the indoor unit includes an indoor heat exchanger that exchanges heat with indoor air. The air conditioner may be operated switchable to the cooling mode or the heating mode.

When the air conditioner is operated in a cooling mode, the outdoor heat exchanger functions as a condenser and the indoor heat exchanger functions as an evaporator. On the other hand, when the air conditioner is operated in the heating mode, the outdoor heat exchanger functions as an evaporator and the indoor heat exchanger functions as a condenser.

On the other hand, the air conditioner further includes a subcooler to supercool before the refrigerant condensed in the condenser is expanded. The supercooler is configured to exchange heat between a main refrigerant circulating through a refrigeration cycle and a branched refrigerant partially branched and expanded from the main refrigerant. By the heat exchange between the main refrigerant and the branched refrigerant, the main refrigerant may be supercooled.

The air conditioner further includes an overheat heat exchanger for overheating the refrigerant to be sucked into the compressor by using the refrigerant that has passed through the condenser. The refrigerant (condensation refrigerant) passing through the condenser and the refrigerant (intake refrigerant) to be sucked into the compressor are heat-exchanged in the superheat heat exchanger. In this process, the condensation refrigerant is supercooled and the intake refrigerant is superheated, thereby improving the efficiency of the refrigerating system. Can be improved.

However, according to the conventional supercooler, since the supercooler and the superheat heat exchanger are separately installed, there is a disadvantage in that the space utilization of the outdoor unit or the indoor unit is not easy and the configuration of the refrigerant pipe is complicated.

In addition, since the pipe provided in the supercooler and the superheat heat exchanger is composed of a spiral tube, the heat exchange area between the refrigerants is limited, and thus there is a problem that sufficient supercooling or overheating of the refrigerant is not achieved.

The present invention has been proposed to solve the above problems, and an object of the present invention is to provide an air conditioner that increases the efficiency of a refrigeration cycle through the supercooling of the condensation refrigerant or the overheating of the compressor suction refrigerant.

An air conditioner according to an embodiment of the present invention includes a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed by the compressor, a supercooling device for allowing the refrigerant passing through the condenser, and a refrigerant having passed through the subcooler. An air conditioner including an evaporator to evaporate, the air conditioner comprising: a first flow path formed inside the supercooling device and guiding a refrigerant passing through the condenser to enter the evaporator; A second flow path acting to exchange heat with the first flow path inside the supercooling device, and to introduce a refrigerant into the compressor; And a third flow path that exchanges heat with the first flow path and guides the refrigerant passing through the evaporator to be sucked into the compressor.

An air conditioner according to another aspect includes a compressor for compressing a refrigerant; A condenser for condensing the refrigerant having passed through the compressor; And a subcooler disposed at an outlet side of the condenser, wherein the subcooler includes: a supercooling body in which a plurality of refrigerant pipes are disposed; A first inlet provided in the subcooling body and introducing refrigerant into the plurality of refrigerant pipes; A plurality of inlets for introducing refrigerant to be heat exchanged with refrigerant flowing through the plurality of refrigerant pipes; And a partition that partitions flow paths of the refrigerant flowing through the plurality of inflows.

According to the present invention, a plurality of pipes are provided in the supercooling apparatus, heat exchange is performed between the first refrigerant flowing in the plurality of pipes and the second refrigerant flowing outside the pipe, thereby increasing the heat exchange area There are advantages.

In addition, as the heat exchange area is increased, the supercooling efficiency is increased, and by ensuring sufficient subcooling, the operation efficiency of the refrigeration cycle can be increased.

In addition, there is an effect that the heat exchange efficiency can be increased by allowing the first refrigerant to flow in one direction and the other direction opposite to the one direction, and performing the heat exchange of the first refrigerant twice.

Further, by injecting (injecting) the second refrigerant that has passed through the supercooling device into the compressor, the amount of refrigerant circulating through the compressor can be increased. Accordingly, there is an advantage that the heating ability can be improved.

In addition, since the supercooling device can be simply constructed, and the two heat exchanging operations can be realized in one supercooling device, compactness of the device can be realized.

1 is a system diagram showing the configuration of an air conditioner according to an embodiment of the present invention.
Figure 2 is an external perspective view showing the configuration of a supercooling apparatus according to an embodiment of the present invention.
3 is an exploded perspective view showing the configuration of a supercooling apparatus according to an embodiment of the present invention.
4 is a cross-sectional view taken along line II ′ of FIG. 2.
FIG. 5 is a cross-sectional view taken along line II-II 'of FIG. 2.
FIG. 6 is a cross-sectional view taken along line III-III ′ of FIG. 2.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. It is to be understood, however, that the spirit of the invention is not limited to the embodiments shown and that those skilled in the art, upon reading and understanding the spirit of the invention, may easily suggest other embodiments within the scope of the same concept.

1 is a system diagram showing the configuration of an air conditioner according to an embodiment of the present invention.

Referring to FIG. 1, a refrigeration cycle in which a refrigerant circulates is driven in an air conditioner 1 according to an embodiment of the present invention. The air conditioner 1 may be cooled or heated according to the circulation direction of the refrigerant.

When the air conditioner 1 performs a heating operation, the air conditioner 1 includes a compressor 10 for compressing a refrigerant and a liquid refrigerant for separating liquid refrigerant from the refrigerant sucked into the compressor 10. A gas-liquid separator 40, an indoor heat exchanger 20 for allowing the refrigerant compressed by the compressor 10 to exchange heat with indoor air, and an outdoor expansion device for expanding the refrigerant condensed in the indoor heat exchanger 20 ( 38), an outdoor heat exchanger 30 for allowing the expanded refrigerant to exchange heat with the outside air, a four-way valve 50 for controlling the circulation direction of the refrigerant discharged from the compressor 10, and a configuration thereof, Refrigerant pipe 60 to guide the flow is included.

And, one side of the indoor heat exchanger 20 and the outdoor heat exchanger 30, blowing fans 25 and 35 for blowing the fluid (air) that is heat-exchanged with the refrigerant is provided. The blowing fans 25 and 35 include an indoor fan 25 and an outdoor fan 35.

On the other hand, when the cooling operation is performed under the control of the four-way valve 50, the circulation direction of the refrigerant is opposite to the refrigerant circulation direction in the heating operation described above. That is, the refrigerant is expanded in the indoor expansion device 28 after passing through the compressor 10 and the outdoor heat exchanger 30, the heat exchange in the indoor heat exchanger (20).

When the air conditioner 1 performs the cooling operation, the refrigerant condensed in the outdoor heat exchanger 30 between the outdoor heat exchanger 30 and the indoor heat exchanger 20 based on the flow direction of the refrigerant. Sub-cooling apparatus 100 for subcooling (subcooler) is provided.

The coolant pipe 60 includes a main inlet 71 for introducing the main refrigerant into the subcooling device 100 and a main discharge part 72 for guiding discharge of the main refrigerant passing through the subcooling device. The main refrigerant is a refrigerant flowing through the refrigerant pipe 60 and may be referred to as a “first refrigerant”.

The air conditioner 1 includes an injection passage 150 for branching and injecting at least some of the first refrigerants of the refrigerant pipe 60 into the compressor 10. The injection passage 150 is branched from the refrigerant pipe 60 and connected to the subcooling device 100. At least some of the refrigerant branched from the first refrigerant is referred to as a "second refrigerant".

The injection flow path 150 includes an injection inlet 151 to allow branched refrigerant to flow into the subcooling device 100. The injection inlet 151 is understood as an inlet defined at a different position than the main inlet 71.

In addition, the injection flow path 150 includes an injection discharge part 152 that guides the refrigerant introduced through the injection inlet 151 to pass after passing through the subcooling device 100. The injection discharge unit 152 is an inlet defined at a position different from the main discharge unit 72, and the refrigerant discharged through the injection discharge unit 152 is injected into the compressor 10.

As such, at least a portion of the refrigerant flowing through the refrigerant pipe 60 passes through the supercooling device 100 and is introduced into the compressor 10 to increase the amount of refrigerant circulating through the compressor or the refrigerant system. It becomes possible.

The injection flow path 150 includes an injection expansion device 155 for expanding the second refrigerant. The second refrigerant is changed to a lower temperature lower than the first refrigerant while passing through the injection expansion device 155, and the subcooler 100 may supercool the first refrigerant while exchanging heat with the first refrigerant.

The first refrigerant supercooled in the subcooling device 100 may expand while passing through the indoor expansion device 28, and may be evaporated in the indoor heat exchanger 20.

In the air conditioner (1), the refrigerant introduced through the superheat suction unit 161 and the superheat suction unit 161 allow the refrigerant evaporated in the indoor heat exchanger 20 to flow into the supercooling device 100. Is included in the supercooling discharge unit 162 to be discharged toward the gas-liquid separator 40 after the heat exchange with the first refrigerant in the supercooling device (100). The refrigerant flowing into the overheat suction unit 161 and discharged from the overheat discharge unit 162 is called a “third refrigerant”.

In the above description, the refrigerant flow in the supercooling device during the cooling operation of the air conditioner has been described. However, when the four sides are adjusted to perform the heating operation, the refrigerant flow is formed to the opposite side.

In detail, the refrigerant condensed in the indoor heat exchanger 20 flows into the subcooling device 100 through the main discharge part 72 and flows out of the main inlet part 71. In addition, the leaked first refrigerant is expanded in the outdoor expansion device 38 and then evaporated in the outdoor heat exchanger 30.

Meanwhile, some of the first refrigerants, that is, the second refrigerants of the first refrigerants flowing out of the main inlet 71 are branched into the injection passage 150, are expanded by the injection expansion device 155, and the subcooling apparatus 100 is expanded. Flows into). The first refrigerant and the second refrigerant are heat exchanged in the subcooling device 100, and in the heat exchange process, the first refrigerant is supercooled and the second refrigerant is vaporized and injected into the compressor 10.

In addition, the third refrigerant evaporated in the outdoor heat exchanger 30 is introduced into the subcooling apparatus 100 through the superheat suction unit 161, and exchanges heat with the first refrigerant in the subcooling apparatus 100. After that, it is introduced into the gas-liquid separator 40 through the overheat discharge unit 162.

Hereinafter, the configuration of the subcooling device 100 will be described with reference to the drawings.

Figure 2 is an external perspective view showing the configuration of a subcooling apparatus according to an embodiment of the present invention, Figure 3 is an exploded perspective view showing the configuration of a subcooling apparatus according to an embodiment of the present invention, Figure 4 is a II 'of FIG. 5 is a cross-sectional view taken along line II-II 'of FIG. 2, and FIG. 6 is a cross-sectional view taken along line III-III' of FIG. 2.

2 to 6, in the subcooling apparatus 100 according to the embodiment of the present invention, a subcooling body forming flow spaces 112a and 112b through which the first refrigerant, the second refrigerant, and the third refrigerant flow. 110 is included. The subcooling body 110 may be formed of a hollow pipe having an empty inside.

The subcooling main body 110 includes a first main body 111 defining a first heat exchange region (or a first piping region) and a second main body 115 defining a second heat exchange region (or a second piping region). Included. A first flow space 112a through which a first refrigerant and a second refrigerant flow is formed in the first main body 111, and the first refrigerant and the third third inside the second main body 115. The second flow space 112b through which the refrigerant flows is formed.

The first body 111 includes a plurality of first refrigerant pipes 131 through which a first refrigerant flows, and a plurality of agents through which the first refrigerant flows inside the second body 115. 2 refrigerant pipe 132 is included. For example, the first and second refrigerant pipes 131 and 132 may be capillary tubes.

The first heat exchange region or the first piping region is understood as a region where the first refrigerant and the second refrigerant are heat exchanged, and the second heat exchange region or the second piping region is a region where the first refrigerant and the third refrigerant are heat exchanged. Can be understood as.

According to the operation mode of the air conditioner, the first refrigerant flows through the first refrigerant pipe 131 and the second refrigerant pipe 132 in order. For example, when the air conditioner performs the cooling operation, the first refrigerant flows through the second refrigerant pipe 132 after passing through the first refrigerant pipe 131, and when the heating operation is performed, the first refrigerant is After passing through the second refrigerant pipe 132, the first refrigerant pipe 131 flows.

The subcooling device 100 is provided on one side of the first body 111 and provided on one side of the main inlet 71 and the second body 115 to guide the inflow of the first refrigerant during the cooling operation. And a main discharge part 72 for guiding the outflow of the first refrigerant.

The supercooling device 100 is provided on one side of the outer circumferential surface of the first body 111 and is provided on the injection inlet 151 for guiding the introduction of the second refrigerant and on the other side of the outer circumferential surface of the first body 110. An injection discharge part 152 for guiding the outflow of the second refrigerant is included.

The supercooling device 100 is provided on one side of the outer circumferential surface of the second body 115 and is provided on the superheat suction part 161 for guiding the introduction of the third refrigerant and on the other side of the outer circumferential surface of the second body 115. It is provided and includes a superheat discharge portion 162 for guiding the outflow of the third refrigerant.

The main inlet 71, the injection inlet 151, and the superheat inlet 161 respectively introduce “coolant” into the subcooling body 110, and thus, “first inlet” and “second inlet”. And "third inlet". In addition, the main discharge part 72, the injection discharge part 152, and the superheat discharge part 162 discharge the refrigerant from the subcooling main body 110. Part "and" third discharge part ".

Between the main inlet 71 and the first body 111, a branch portion 120 for branching the first refrigerant introduced through the main inlet 71 in a plurality of paths (euro) is included. do. The branch part 120 may be understood as a configuration provided between the main inlet part 71 and the first refrigerant pipe 131.

The main inlet 71 is coupled to one side of the branch portion 120, and the first body 111 is coupled to the other side. In addition, the branch portion 120 is provided in a hollow pipe shape.

In detail, the branch portion 120 includes an inflow coupling portion 121 coupled to the main inflow portion 71 and a first shielding portion 122 in which a plurality of first pipe coupling portions 123 are formed. In addition, the first shielding part 122 functions to block the flow (leakage) of the second refrigerant flowing into the first body 111 to the outside of the first body 110.

The first pipe coupling part 122 has a shape of a hole having a predetermined size so that the plurality of first refrigerant pipes 131 can be coupled.

In addition, the plurality of first refrigerant pipes 131 extend in the longitudinal direction of the first body 111 in a state spaced apart from each other, is coupled to the pipe coupling portion 123, the first refrigerant is It guides to be transmitted from one side of the first body 111 to the other side.

Between the first refrigerant pipe 131 and the second refrigerant pipe 132, partitions 125 and 140 are provided to partition the first heat exchange region and the second heat exchange region. The partitions 125 and 140 are composed of hollow pipes.

The partitions 125 and 140 include a first partition 125 coupled to the first refrigerant pipe 131. That is, the branch part 120 is coupled to one side of the first refrigerant pipe 131, and the first compartment 125 is coupled to the other side of the first refrigerant pipe 132.

The first partition part 125 includes a second shielding part 126 in which a plurality of second pipe coupling parts 127 are formed. The second shielding part 126 serves to prevent the second refrigerant flowing through the first refrigerant pipe 131 from flowing (leaking) out of the first refrigerant pipe 131. In summary, the first shielding part 122 shields one end of the first refrigerant pipe 131, and the second shielding part 126 shields the other end of the first refrigerant pipe 131. And prevent the second refrigerant from mixing with the first or third refrigerant.

The plurality of first refrigerant pipes 131 are coupled to the plurality of second pipe coupling parts 127. The first refrigerant introduced into the first refrigerant pipe 131 through the first pipe coupling part 123 is introduced into the first compartment 125 through the second pipe coupling part 127. .

The partitions 125 and 140 include a second partition 140 coupled to the second refrigerant pipe 132.

The first partition part 125 includes a third shielding part 141 in which a plurality of third pipe coupling parts 142 are formed. The third shielding part 141 serves to prevent the third refrigerant flowing through the second refrigerant pipe 132 from flowing (leaking) out of the second refrigerant pipe 132.

The plurality of second refrigerant pipes 132 are coupled to the plurality of third pipe coupling parts 142. The first refrigerant introduced into the first compartment 125 through the second pipe coupling part 127 passes through the second compartment 140, and then passes through the third pipe coupling part 142. Branched and introduced into the second refrigerant pipe 132.

In summary, the first refrigerant flowing through the first refrigerant pipe 131 is laminated in the first compartment 125 and the second compartment 140, and the first refrigerant is evenly mixed in this process. The first refrigerant may include a subcooled (saturated liquid) refrigerant and a refrigerant in some two-phase states, and this mixing effect may reduce flow loss.

In the present embodiment, the partitions 125 and 140 have been described as being composed of separate first and second partitions. Alternatively, the first partition 125 and the second partition 140 may be integrally formed. will be.

Between the second main body 115 and the main discharge part 72, a lamination part 145 for laminating the first refrigerant flowing along the inside of the second refrigerant pipe 132 is provided. The second refrigerant pipe 132 is coupled to one side of the lamination part 145, and the main discharge part 72 is coupled to the other side. The lamination part 145 is provided in a hollow pipe shape.

In detail, the lamination part 125 includes a fourth shielding part 146 in which a plurality of fourth pipe coupling parts 147 are formed, and a discharge coupling part 148 coupled to the main discharge part 72. .

The fourth shield 146 serves to block the third refrigerant flowing in the second main body 115 from flowing (leaking) to the outside of the second main body 115. In summary, the third shield 141 shields one end of the second refrigerant pipe 132, and the fourth shield 146 shields the other end of the second refrigerant pipe 132. And prevent the third refrigerant from mixing with the first refrigerant or the second refrigerant.

The fourth pipe coupling part 147 has a shape of a hole having a predetermined size so that the plurality of second refrigerant pipes 132 can be coupled. That is, the third pipe coupling part 142 is coupled to one side of the second refrigerant pipe 132, and the fourth pipe coupling part 147 is coupled to the other side of the second refrigerant pipe 132.

When the first refrigerant is introduced into the lamination part 145 through the fourth pipe coupling part 147, the first refrigerant may be mixed with each other by the increased flow space. The first refrigerant may include a subcooled (saturated liquid) refrigerant and a refrigerant in some two-phase states, and this mixing effect may reduce flow loss.

The first main body 111 is provided with a first coupling part 113 to which the injection inlet part 151 is coupled and a second coupling part 114 to which the injection discharge part 152 is coupled. The injection inlet 151 and the injection discharge 152 may extend from the first coupling part 112 and the second coupling part 113 in the same direction or in different directions (not shown).

The second refrigerant introduced through the injection inlet 151 flows through the interior of the first body 111, and after being heat-exchanged with the first refrigerant in the flow process, is discharged through the injection discharge unit 152. .

The second main body 115 is provided with a third coupling part 117 to which the overheat suction part 161 is coupled and a fourth coupling part 118 to which the overheat discharge part 162 is coupled. The overheat suction part 161 and the overheat discharge part 162 may extend from the third coupling part 117 and the fourth coupling part 118 in the same direction or in different directions (not shown).

The third refrigerant introduced through the overheat suction unit 161 flows inside the second body 115, and after being heat exchanged with the first refrigerant in the flow process, flows out through the superheat discharge unit 162. .

Inside the subcooling body 110, a first flow path 171 through which the first refrigerant flows, a second flow path 172 through which the second refrigerant flows, and a third flow path 172 through which the third refrigerant flows, are provided. Included.

In detail, the first flow path 171 is understood as a path that flows until a first refrigerant flows in from the main suction part 71 and flows out through the main discharge part 72, and the first refrigerant pipe ( 131 and the inner space of the second refrigerant pipe 132.

The second flow path 172 is understood as a path that flows until the second refrigerant flows from the injection inlet 151 and flows out through the injection discharge unit 152, and the first body 111. The outer space of the first refrigerant pipe 131 is included.

The third flow path 173 is understood as a path through which the third refrigerant flows from the overheat suction part 161 and flows out through the overheat discharge part 162 and the second main body 115. The outer space of the second refrigerant pipe 132 is included.

As described above, one end of the second flow path 172 is defined by the first shield 122, and the other end is defined by the second shield 126. One end of the third flow path 173 is defined by the third shield 141, and the other end thereof is defined by the fourth shield 146.

In summary, a plurality of refrigerant passages are defined in the subcooling main body 110, and a first flow passage 171 of the plurality of refrigerant passages is formed inside the refrigerant pipe, and the second passage 172 and the third passage ( 173 has an effect that the heat transfer area can be increased by being formed outside the refrigerant pipe. Here, the heat exchange area of the first refrigerant and the second refrigerant or the heat exchange area of the first refrigerant and the third refrigerant may correspond to the area of the outer circumferential surface (circumference) of the plurality of refrigerant pipes 131 and 13.

The operation according to the embodiment of the present invention will be described.

When the injection into the compressor 10 is made, the injection expansion device 155 is opened so that the second refrigerant flows into the injection flow path 150 and expands, and the first injection inlet 151 opens the first injection path. It flows into the main body 111.

The first refrigerant is introduced into the first refrigerant pipe 131 through the main suction unit 71. The first refrigerant and the second refrigerant are heat exchanged inside and outside the first refrigerant pipe 131. In this process, the first refrigerant is first subcooled and the second refrigerant is vaporized.

Then, the third refrigerant passing through the evaporator is introduced into the second body 115 through the overheat suction unit 161. The first refrigerant supercooled through heat exchange with the second refrigerant flows into the second refrigerant pipe 132 through the partitions 125 and 140, and the first refrigerant and the third refrigerant flow through the second refrigerant pipe ( Heat exchange takes place inside and outside 132. In this process, the first refrigerant is secondary supercooled and the third refrigerant is overheated. After the first refrigerant is discharged from the subcooling device 100, the first refrigerant may be expanded through the indoor expansion device 28 or the outdoor expansion device 38 and evaporated in the evaporator.

In the above embodiment, in the case of the cooling operation, the first refrigerant is sequentially heat-exchanged with the second refrigerant and the third refrigerant. However, in the case of the heating operation, the first refrigerant is the third refrigerant and the second refrigerant, on the contrary. And in turn will be heat exchanged.

As such, since the refrigerant condensed in the condenser may be supercooled by two heat exchange actions, the evaporation capacity may be improved, the refrigerant may be injected into the compressor, the system refrigerant amount may be increased, and the refrigerant to be sucked into the compressor may be overheated. As a result, the system efficiency can be improved.

On the other hand, when no injection into the compressor 10 is made, the injection expansion device 155 is closed so that the flow of the second refrigerant is restricted.

However, in the supercooling apparatus 100, heat exchange may be performed between the first refrigerant and the third refrigerant passing through the evaporator, in which the first refrigerant ensures overcooling and the third refrigerant ensures overheating. You can do it.

As such, there is an advantage that the subcooling of the first refrigerant can be ensured even when the refrigerant is not injected into the compressor.

On the other hand, according to an embodiment of the present invention, since the first flow path, a pipe having a small diameter such as a capillary tube may be included to increase the flow rate (or heat flow rate) of the first refrigerant, and thus the heat transfer coefficient is increased. There is an advantage that the efficiency can be increased.

In addition, the condensed first refrigerant flows into the first and second refrigerant pipes 131 and 132, and a second or third refrigerant in a two-phase state flows outside the first and second refrigerant pipes 130. Can be reduced so that the flow loss can be reduced.

That is, when the second refrigerant or the third refrigerant flows into the first and second refrigerant pipes 131 and 132, a liquid refrigerant flows through one of the refrigerant pipes 131 or 132 and another refrigerant flows. It is possible to prevent the equal distribution of the two-phase refrigerant by making the gaseous refrigerant flow through the pipe.

Further, there is an advantage that the flow loss can be reduced, thereby increasing the flow rate of the refrigerant and increasing the heat exchange efficiency.

1: air conditioner 10: compressor
20: indoor heat exchanger 28: indoor expansion device
30: outdoor heat exchanger 38: outdoor expansion device
40: gas-liquid separator 50: four sides
60: refrigerant pipe 71: main inlet
72: main discharge portion 100: supercooling device
110: supercooling body 111: first body
112: second body 120: branch portion
122: first shielding portion 125: first partition portion
126: second shield portion 131: first refrigerant pipe
132: second refrigerant pipe 140: second compartment
141: third shield portion 145: lamination portion
146: fourth shield 151: injection inlet
152: injection discharge unit 161: overheat suction unit
162: overheat discharge section

Claims (12)

An air conditioner comprising a compressor for compressing a refrigerant, a condenser for condensing the refrigerant compressed by the compressor, a subcooler for allowing the refrigerant passing through the condenser to be supercooled, and an evaporator for evaporating the refrigerant passing through the subcooler.
A first flow path formed inside the supercooling device and configured to guide the refrigerant passing through the condenser to the evaporator;
A second flow path acting to exchange heat with the first flow path inside the supercooling device, and to introduce a refrigerant into the compressor; And
And a third flow path that is heat-exchanged with the first flow path and guides the refrigerant passing through the evaporator to be sucked into the compressor. The method of claim 1,
The first air conditioner, the air conditioner includes a plurality of refrigerant pipes for allowing the refrigerant to flow along a plurality of paths. The method of claim 2,
A partition unit for partitioning the plurality of refrigerant pipes is further included,
The second flow path is disposed on one side of the partition, the third flow path is disposed on the other side of the air conditioner. The method of claim 3, wherein
In the partition,
A shielding unit which blocks mixing of the refrigerant of the second flow path and the refrigerant of the third flow path; And
Is formed in the shield, the air conditioner including a pipe coupling portion coupled to the plurality of refrigerant pipes. The method of claim 2,
In the first flow path,
A branch unit for branching the refrigerant introduced into the subcooling device into the plurality of refrigerant pipes; And
And a lamination part for laminating the refrigerant passing through the plurality of refrigerant pipes. The method of claim 1,
The refrigerant of the first flow path is primarily heat exchanged with one of the refrigerants of the second flow path and the refrigerant of the third flow path, and then the second heat exchange is performed with other refrigerants of the refrigerant of the second flow path and the third flow path. Air conditioner characterized by. A compressor for compressing the refrigerant;
A condenser for condensing the refrigerant passing through the compressor; And
Includes a subcooler disposed on the outlet side of the condenser,
The subcooler,
A supercooling body in which a plurality of refrigerant pipes are arranged;
A first inlet provided in the subcooling body and introducing refrigerant into the plurality of refrigerant pipes;
A plurality of inlets for introducing refrigerant to be heat exchanged with refrigerant flowing through the plurality of refrigerant pipes; And
Air conditioner comprises a partition for partitioning the flow path of the refrigerant flowing through the plurality of inlet. The method of claim 7, wherein
In the plurality of inlets,
A second inlet unit through which at least some of the refrigerant passing through the condenser is bypassed; And
An air conditioner including a third inlet through which the refrigerant passing through the evaporator flows. The method of claim 8,
In the supercooling body,
A first heat exchange region through which the refrigerant introduced through the second inlet exchanges heat; And
And a second heat exchange region in which the refrigerant introduced through the third inlet exchanges heat. The method of claim 9,
And the first heat exchange zone and the second heat exchange zone are separated by the partition. The method of claim 7, wherein
The plurality of refrigerant pipes,
A first refrigerant pipe coupled to one side of the partition; And
A second refrigerant pipe is coupled to the other side of the partition portion,
In the compartment, the air conditioner, characterized in that the refrigerant introduced from the first refrigerant pipe or the second refrigerant pipe is laminated. The method of claim 7, wherein
The plurality of refrigerant pipes, air conditioner that includes a capillary tube.

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