KR20140115193A - Heat exchange and air conditioner having the same - Google Patents

Abstract

An air conditioner includes: a housing; a refrigerant inlet pipe and a refrigerant outlet pipe of which a refrigerant flows in and out; and a heat exchanger which is linked to the refrigerant inlet pipe and the refrigerant outlet pipe and is arranged in the housing to exchange heat with the outside air. The heat exchanger includes: a first circular pipe heat exchanger which is linked to the refrigerant inlet pipe to exchange heat through a circular pipe with a refrigerant flow; a tube-type heat exchanger which is linked to the first circular pipe heat exchanger and exchanges heat through a plate-shaped tube; a second circular pipe heat exchanger which is linked to the tube-type heat exchanger and exchanges heat through another circular pipe with another refrigerant flow to discharge the refrigerant to the refrigerant outlet pipe. Such configuration ensures that there is no excessively heated or cooled area in the heat exchanger to maximize the heat transfer performance.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a heat exchanger,

The present invention relates to a heat exchanger and an air conditioner having the same, and more particularly, to a heat exchanger having a structure for improving the heat transfer performance of a heat exchanger and an air conditioner having the same.

Generally, the air conditioner uses a refrigeration cycle to control the temperature, humidity, airflow, distribution, etc. suitable for human activity and to remove dust and the like in the air. Compressors, condensers, evaporators, blowers, etc. are the main components of the refrigeration cycle.

The condenser and the evaporator perform heat exchange with the outside through a heat exchanger including a flow path through which the refrigerant flows.

The heat exchanger has a circular tube heat exchanger in which a circular tube is inserted into the fin and a flat tube heat exchanger in the form of a flat tube inserted into the fin. The circular tube heat exchanger has a disadvantage in that it is easy to control but has a low thermal efficiency, and the flat tube heat exchanger has a high thermal efficiency, but is difficult to control.

In addition, since the flat tube heat exchanger flows the refrigerant in several parallel pipes at a time in parallel through the header, it is difficult to evenly distribute the amount of refrigerant flowing in each flat tube. Accordingly, in the flat pipe heat exchanger, when some of them are discharged in an overheated state and some of them are discharged in a wet state, they can be discharged in a state in which they are not overheated while being mixed at the outlet. When the outlet is discharged in a fully overheated state, There is a problem that the heat transfer performance is deteriorated.

One aspect of the present invention provides a heat exchanger capable of increasing the heat transfer efficiency and reducing overheating and supercooling periods, and an air conditioner having the heat exchanger.

According to an aspect of the present invention, an air conditioner includes a housing; A refrigerant inlet pipe and a refrigerant outlet pipe through which the refrigerant flows; And a heat exchanger communicated with the refrigerant inflow pipe and the refrigerant outflow pipe and provided inside the housing to exchange heat with outside air, wherein the heat exchanger is connected to the refrigerant inflow pipe, A first circular tube heat exchanger for heat exchange; A tubular heat exchanger communicating with the first circular pipe heat exchanger and performing heat exchange through a plate-shaped tube through which refrigerant flows; And a second circular pipe heat exchanger communicating with the tubular heat exchanger and performing heat exchange through a circular pipe through which refrigerant flows to discharge the refrigerant into the refrigerant outlet pipe.

A first refrigerant guide pipe for distributing the refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger; and a second refrigerant guide pipe for distributing the refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger; A second refrigerant guide pipe for distributing the refrigerant from the first circular pipe heat exchanger to the tubular heat exchanger; A third refrigerant guide pipe for distributing the refrigerant from the tubular heat exchanger to the second circular pipe heat exchanger; And a fourth refrigerant guide pipe for guiding and guiding the refrigerant from the second circular pipe heat exchanger to the refrigerant outlet pipe.

An inlet port and an outlet port through which the refrigerant flows in and out of the heat exchanger are provided together on one side of the heat exchanger, and the refrigerant guide section is disposed on one side of the heat exchanger.

The first circular tube heat exchanger, the second circular tube heat exchanger, and the tubular heat exchanger may be parallel.

A suction port provided at one side of the housing for sucking air from the outside; A discharge port provided at another side of the housing to discharge air inside the housing; And a flow passage communicating with the suction port and the discharge port and passing air therethrough, wherein the heat exchanger is disposed on the flow path.

And the first circular tube heat exchanger and the second circular tube heat exchanger may be in contact with one surface of the tubular heat exchanger.

The heat exchanger according to the present invention includes a tubular heat exchanger having a plate-like tube through which refrigerant flows; A first circular pipe heat exchanger and a second circular pipe heat exchanger having a circular pipe through which refrigerant flows; A refrigerant inlet pipe communicating with the first circular pipe heat exchanger to introduce the refrigerant; The refrigerant flowing into the first circular pipe heat exchanger through the refrigerant inlet pipe flows into the second circular pipe heat exchanger through the tubular heat exchanger and the second circular pipe heat exchanger through the second circular pipe heat exchanger, And is discharged through the refrigerant outlet pipe.

A first refrigerant guide pipe for distributing the refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger; and a second refrigerant guide pipe for distributing the refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger; A second refrigerant guide pipe for distributing the refrigerant from the first circular pipe heat exchanger to the tubular heat exchanger; A third refrigerant guide pipe for distributing the refrigerant from the tubular heat exchanger to the second circular pipe heat exchanger; And a fourth refrigerant guide pipe for guiding and guiding the refrigerant from the second circular pipe heat exchanger to the refrigerant outlet pipe.

INDUSTRIAL APPLICABILITY The heat exchanger and the air conditioner having the heat exchanger of the present invention can minimize the supercooling and the superheating section, thereby maximizing the heat transfer performance and improving the manufacturing efficiency and economical efficiency by not requiring a separate distributing mechanism for preventing overcooling and overheating .

1 is a view showing an outdoor unit of an air conditioner according to an embodiment of the present invention.
2 is a front perspective view of a heat exchanger according to an embodiment of the present invention;
3 is a rear perspective view of a heat exchanger in accordance with an embodiment of the present invention.
4 is an exploded perspective view of a heat exchanger according to an embodiment of the present invention;
Figures 5, 6 and 7 are diagrams of refrigerant circulation in a heat exchanger according to one embodiment of the present invention.

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

1 is an upper cross-sectional view of an outdoor unit of an air conditioner according to an embodiment of the present invention.

1, an outdoor unit 10 of an air conditioner according to the present invention includes a housing including an upper panel (not shown), a rear panel 12, a side panel 13, And a partition 28 partitioning the compression chamber 20 and the heat exchange chamber 24. An upper panel (not shown) is provided above the heat exchange chamber 24 and the compression chamber 20.

The heat exchange chamber 24 is provided with a heat exchanger 100 bent in a shape along the rear panel 12 and the side panel 13 of the housing and a heat exchanger 100 through which the outside air is introduced into the housing to pass through the heat exchanger 100 An axial flow fan 30 for discharging air to the outside of the rear housing and a bell mouth 90 for guiding the flow of air generated by the axial flow fan 30 are provided. Inside the bell mouth 90, a guide portion 80 is provided to protect the axial fan 30.

A motor 32 for driving the axial flow fan 30 is provided in the housing.

A suction port 14 is formed in the rear panel 12 and the side panel 13 so as to allow air to flow into the heat exchanger 100 and air flowing through the heat exchanger 100 flows out from the front panel 11. [ A discharge port 11a is formed.

The heat exchanger 100, the motor 32, the axial flow fan 30 and the bell mouth 90 are arranged in this order from the upstream side of the flow of air generated by the axial flow fan 30.

The compressor (20) is provided with a compressor (22) for compressing the refrigerant. The refrigerant compressed in the compressor (22) moves to the heat exchanger (100) side.

FIG. 2 is a front perspective view of a heat exchanger according to an embodiment of the present invention, FIG. 3 is a rear perspective view of a heat exchanger according to an embodiment of the present invention, FIG. 4 is an exploded perspective view of a heat exchanger according to an embodiment of the present invention, to be.

The heat exchanger (100) includes a circular tube heat exchanger (110) and a tubular heat exchanger (120). The heat exchanger 100 may be disposed on the flow path 15 provided between the suction port 14 and the discharge port 11a.

The circular pipe heat exchanger 110 may include a circular pipe 112 through which the coolant flows and a circular pipe heat exchanger heat exchange pin 116 provided to cross the circular pipe 112.

The circular tube 112 may be formed in various shapes, but in the embodiment of the present invention, a plurality of tubes having a circular cross section are provided to be bent in a U-shape, and a channel may be formed to allow the refrigerant to flow therein have. Specifically, the circular tube 112 has a circular tube curved portion 112a, which is a portion formed by bending and curved, and a pair of circular tube straight portions 112b, which are formed by extending from the end of the circular tube curved portion 112a, . Also, the circular tubes 112 can be extruded from an aluminum material in consideration of the heat exchange efficiency.

A circular pipe heat exchanger inlet pipe 114a, which is an inlet of the refrigerant, and a circular pipe heat exchanger outlet pipe 114b, which is an outlet pipe, are provided at the ends of the pair of circular pipe straight sections 112b.

The circular tube heat exchanger heat exchange fins 116 are provided in the circular tube to increase the heat transfer area with the outside air to improve the heat exchange efficiency of the refrigerant flowing through the circular tube and to contact the outer wall of the circular tube straight portion 112b And a plurality of the tubes may be spaced apart at regular intervals in a direction perpendicular to the direction in which the circular tubes 112 extend.

The tubular heat exchanger 120 may include a plate-shaped tube 122 and a tubular heat exchanger heat exchange fin 124 provided between the tube 122 to increase the heat transfer area.

The tube 122 may have various shapes, but in the embodiment of the present invention, the tube 122 is formed in a plate shape, and a flow path is formed so that the refrigerant can flow therein. Further, a plurality of tubes 122 may be formed in parallel.

The tubular heat exchanger heat exchange fin 124 may be provided to contact a plurality of tubes 122 between the plurality of tubes 122. The tubular heat exchanger heat exchange fins 124 may be provided in various shapes, and may be bent in a zigzag shape in the embodiment of the present invention.

The tubular heat exchanger 120 is provided with a pair of header units 126 and the plurality of tubes 122 are coupled with a pair of header units 126 at both ends. The header unit 126 includes a header unit 126 provided at one end of the tube 122 as a first header unit 126a and a header unit 126 provided at the other end as a second header unit 126b.

The first header unit 126a and the second header unit 126b are spaced apart from each other by a predetermined distance and the plurality of tubes 122 are provided between the first header unit 126a and the second header unit 126b . The refrigerant flowing into the tube type heat exchanger 120 through the first header unit 126a is distributed to the plurality of tubes 122 and the refrigerant flowing through the tube 122 through the second header unit 126b is circulated .

The first header unit 126a may be provided with a tubular heat exchanger inlet pipe 128a and a tubular heat exchanger outlet pipe 128b which are an inlet of the refrigerant to the tubular heat exchanger 120. [

The heat exchanger 100 may be provided with a refrigerant inlet pipe 102 and a refrigerant outlet pipe 104 through which the refrigerant flows. In detail, the refrigerant inlet pipe 102 and the refrigerant outlet pipe 104 may communicate with the first circular pipe heat exchanger 110a and the second circular pipe heat exchanger 110b, respectively.

The circular tube heat exchanger 110 may include a first circular tube heat exchanger 110a and a second circular tube heat exchanger 110b. The first circular pipe heat exchanger 110a and the second circular pipe heat exchanger 110b may be partitioned by a single circular pipe heat exchanger 110 or may be formed of separate circular pipe heat exchangers 110 .

The refrigerant guide portion 140 is provided between the refrigerant inlet pipe 102 and the first circular pipe heat exchanger 110a to guide the refrigerant between the heat exchanger 100 and the first refrigerant pipe And a second refrigerant guide pipe 142 provided between the first circular pipe heat exchanger 110a and the tubular heat exchanger 120 for guiding the refrigerant from the first circular pipe heat exchanger 110a to the tubular heat exchanger 120 A third refrigerant guide pipe 143 provided between the tubular heat exchanger 120 and the second circular pipe heat exchanger 110b for guiding the refrigerant from the tubular heat exchanger 120 to the second circular pipe heat exchanger 110b And a fourth refrigerant guide pipe 144 provided between the second circular pipe heat exchanger 110b and the refrigerant outlet pipe 104 to join and guide the refrigerant.

One end of the first refrigerant guide pipe 141 communicates with the refrigerant inlet pipe 102 to receive the refrigerant and the other end communicates with the plurality of circular pipe heat exchanger inlet pipes 114a of the first circular pipe heat exchanger 110a So that the refrigerant can be distributed and introduced into the first circular tube heat exchanger 110a.

One end of the second refrigerant guide pipe 142 communicates with the plurality of the circular pipe heat exchanger outlet pipes 114b of the first circular pipe heat exchanger 110a and the refrigerant flows into the second refrigerant pipe 142. The other end of the refrigerant flows into the tubular heat exchanger 120 And is connected to the heat exchanger inlet pipe 128a so that the refrigerant can join and flow into the tubular heat exchanger 120. [

One end of the third refrigerant guide pipe 143 is connected to the tubular heat exchanger outlet pipe 128b of the tubular heat exchanger 120 so that the refrigerant is introduced and the other end is connected to the plurality of circular pipes of the second circular pipe heat exchanger 110b And communicates with the heat exchanger inlet pipe 114a so that the refrigerant can be distributed and introduced into the second circular pipe heat exchanger 110b.

One end of the fourth refrigerant guide pipe 144 communicates with the plurality of circular pipe heat exchanger outlet pipes 114b of the second circular pipe heat exchanger 110b to allow the refrigerant to flow therein and the other end to communicate with the refrigerant outlet pipe 104 So that the refrigerant can join and flow out to the refrigerant outlet pipe 104.

The refrigerant guide portion 140 may be provided at one side of the heat exchanger 100. In detail, a circular tube heat exchanger inlet pipe 114a provided at an end of the circular pipe straight line portion 112b of the first circular pipe heat exchanger 110a and the second circular pipe heat exchanger 110b, The tubular heat exchanger inlet pipe 128a and the tubular heat exchanger outlet pipe 128b provided in the first header unit 126a of the tubular heat exchanger 120 and flowing in and out of the refrigerant are provided on the same side And the coolant guide portion 140 may be disposed on one side.

Hereinafter, the operation of the heat exchanger and the air conditioner having the heat exchanger will be described.

FIGS. 5, 6 and 7 are views illustrating a circulation of refrigerant in a heat exchanger according to an embodiment of the present invention.

As shown in FIG. 5, the refrigerant flows into the first circular pipe heat exchanger 110a through the refrigerant inlet pipe 102 and the first refrigerant pipe 141.

Thereafter, the refrigerant circulates through the first circular pipe heat exchanger 110a and flows into the tubular heat exchanger 120 through the second refrigerant guide pipe 142 as shown in FIG.

The refrigerant is circulated through the tubular heat exchanger 120 and flows into the second circular pipe heat exchanger 110b through the third refrigerant guide pipe 143 and flows through the second circular pipe heat exchanger 110b And then flows out from the heat exchanger 100 through the refrigerant outlet pipe 104. [

In this process, the outlet quality of the refrigerant is in the range of 0.1 to 0.4 while performing the heat exchange through the first circular pipe heat exchanger 110a, and the outlet quality of the refrigerant is 0.8 to 0.8, while performing the heat exchange through the tubular heat exchanger 120, 0.95. Finally, heat exchange in the second circular pipe heat exchanger 110b can be controlled so that the degree of heat 1 at the outlet and the desired superheat degree can be obtained.

On the contrary, in the case of cooling, the refrigerant flows in a direction opposite to the heating direction, and is made into a humid state in the superheated steam state via the first circular tube heat exchanger 110a. In the tubular heat exchanger 120, So that the final second circular pipe heat exchanger 110b can have a degree of zero and a desired subcooling degree.

The foregoing has shown and described specific embodiments. However, it should be understood that the present invention is not limited to the above-described embodiment, and various changes and modifications may be made without departing from the technical idea of the present invention described in the following claims .

10: outdoor unit 11: front panel
11a: Outlet port 12: Rear panel
13: side panel 14: inlet
15: flow passage 20: compression chamber
24: heat exchange chamber 28: partition wall
30: Axial flow fan 32: Motor
90: Bell mouth 80: Guide part
100: Heat exchanger 102: Refrigerant inlet pipe
104: Refrigerant outflow pipe 110: Circular pipe heat exchanger
110a: first circular tube heat exchanger 110b: second circular tube heat exchanger
112: circular tube 112a: circular tube curved part
112b: circular pipe straight section 114a: circular pipe heat exchanger inlet pipe
114b: Circular tube heat exchanger outlet tube 116: Circular tube heat exchanger heat exchange pin
120: tubular heat exchanger 122: tube
124: tubular heat exchanger heat exchange fin 126: header unit
126a: first header unit 126b: second header unit
128a: Tubular heat exchanger inlet pipe 128b: Tubular heat exchanger outlet pipe
140: refrigerant guide portion 141: first refrigerant guide pipe
142: second refrigerant guide pipe 143: third refrigerant guide pipe
144: fourth refrigerant guide pipe

Claims (8)

housing;
A refrigerant inlet pipe and a refrigerant outlet pipe through which the refrigerant flows;
And a heat exchanger communicated with the refrigerant inlet pipe and the refrigerant outlet pipe, the heat exchanger being provided inside the housing and performing heat exchange with outside air,
The heat exchanger
A first circular pipe heat exchanger communicating with the refrigerant inlet pipe and performing heat exchange through a circular pipe through which the refrigerant flows;
A tubular heat exchanger communicating with the first circular pipe heat exchanger and performing heat exchange through a plate-shaped tube through which refrigerant flows;
And a second circular pipe heat exchanger communicating with the tubular heat exchanger and performing heat exchange through a circular pipe through which refrigerant flows to discharge the refrigerant into the refrigerant outlet pipe. The method according to claim 1,
And a coolant guide portion for guiding the movement of the coolant between the heat exchangers,
The refrigerant guide portion
A first refrigerant guide pipe for distributing refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger;
A second refrigerant guide pipe for distributing the refrigerant from the first circular pipe heat exchanger to the tubular heat exchanger;
A third refrigerant guide pipe for distributing the refrigerant from the tubular heat exchanger to the second circular pipe heat exchanger;
And a fourth refrigerant guide pipe for guiding and guiding the refrigerant from the second circular pipe heat exchanger to the refrigerant outlet pipe. 3. The method of claim 2,
Wherein an inlet and an outlet for the refrigerant to flow in and out of the heat exchanger are provided on one side of the heat exchanger and the refrigerant guide is disposed on one side of the heat exchanger. The method according to claim 1,
Wherein the first circular tube heat exchanger, the second circular tube heat exchanger, and the tubular heat exchanger are parallel. The method according to claim 1,
A suction port provided at one side of the housing for sucking air from the outside;
A discharge port provided at another side of the housing to discharge air inside the housing;
And an air passage communicating with the air inlet and the air outlet,
And the heat exchanger is disposed on the flow path. The method according to claim 1,
Wherein the first circular tube heat exchanger and the second circular tube heat exchanger are provided in contact with one surface of the tubular heat exchanger. A tubular heat exchanger having a plate-like tube through which refrigerant flows;
A first circular pipe heat exchanger and a second circular pipe heat exchanger having a circular pipe through which refrigerant flows;
A refrigerant inlet pipe communicating with the first circular pipe heat exchanger to introduce the refrigerant;
And a refrigerant outlet pipe communicating with the second circular pipe heat exchanger to discharge the refrigerant,
Wherein the refrigerant flowing into the first circular pipe heat exchanger through the refrigerant inlet pipe flows into the second circular pipe heat exchanger through the tubular heat exchanger and is discharged through the refrigerant outlet pipe. 8. The method of claim 7,
And a coolant guide portion for guiding the movement of the coolant between the heat exchangers,
The refrigerant guide portion
A first refrigerant guide pipe for distributing refrigerant from the refrigerant inlet pipe to the first circular pipe heat exchanger;
A second refrigerant guide pipe for distributing the refrigerant from the first circular pipe heat exchanger to the tubular heat exchanger;
A third refrigerant guide pipe for distributing the refrigerant from the tubular heat exchanger to the second circular pipe heat exchanger;
And a fourth refrigerant guide pipe for guiding and guiding the refrigerant from the second circular pipe heat exchanger to the refrigerant outlet pipe.

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