KR20060075848A - Heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger, and more particularly to a uniform amount of refrigerant in each tube by forming partition walls having distribution holes of different sizes in the lower header tanks for returning the refrigerant from the plurality of extruded tube type heat exchangers. The present invention relates to a heat exchanger capable of improving the pressure drop on the refrigerant side to improve the heat exchange performance, reducing the temperature deviation, and making the air temperature passed through the heat exchanger uniform.

Accordingly, the present invention has a plurality of tubes 130 having a flow path therein and arranged in a plurality of rows, a heat dissipation fin 140 interposed between the tubes 130, and one end of the tube 130 and the An upper header tank 110 having a plurality of passages 113a and 113b which are in communication with a plurality of rows of tubes arranged in a row, and which has inlet and outlet pipes 101 and 102 for inflow and outflow of a heat exchange medium. And a lower header tank 120 coupled to the other end of the tube 130 and communicating the plurality of rows of tubes to return the heat exchange medium, the lower header tank 120 includes: Refrigerant distribution means 160 is provided to allow a uniform amount of heat exchange medium to flow to the tube 130 by varying the amount of the heat exchange medium that passes through the tube 130, wherein the refrigerant distribution means 160 is the lower header. The stomach of the tank 120 The partition wall 161 bisects into a plurality of passages 123a and 123b so as to communicate with the tube rows of the plurality of passages. Characterized by consisting of a plurality of distribution holes 162 arranged in size.

Heat Exchanger, Evaporator, Header Tank, Tube, Heat Sink, Bulkhead, Distribution Hole

Description

Heat exchanger

1 is a perspective view showing a conventional heat exchanger,

2 is a cross-sectional view taken along the line A-A in FIG.

3 is a perspective view of a heat exchanger according to the present invention;

4 is a cross-sectional view taken along line B-B in FIG. 3;

5A to 5E are exploded perspective views illustrating various embodiments of a refrigerant distribution means installed in the lower header tank of the present invention.

<Description of Signs of Major Parts of Drawings>

100: heat exchanger 101: inlet pipe

102: outlet pipe 110: upper header tank

111,121: header 112,122: tank

113a, 113b, 123a, 123b: Passage 115,125: End cap

120: lower header tank 121a: tube hole

130: tube 131: rear tube row

132: front tube row 140: heat dissipation fins

150: end plate 160: refrigerant distribution means

161: partition 162: distribution hole

The present invention relates to a heat exchanger, and more particularly to a uniform amount of refrigerant in each tube by forming partition walls having distribution holes of different sizes in the lower header tanks for returning the refrigerant from the plurality of extruded tube type heat exchangers. The present invention relates to a heat exchanger capable of improving the pressure drop on the refrigerant side to improve the heat exchange performance, reducing the temperature deviation, and making the air temperature passed through the heat exchanger uniform.

The heat exchanger has a flow path through which a heat exchange medium flows, and is used to heat exchange the heat exchange medium and the outside air. The heat exchanger is used in various air-conditioning devices. Various types of radiators, heater cores and the like are used for the medium.

Among the heat exchangers, the evaporator is classified according to the structural type of the refrigerant passage, such as a serpentine type in which a single extruded tube is bent in multiple stages, a laminate type in which a dimple-shaped plate is laminated, and a plurality of extruded tubes. The multiple extruder tube type evaporator used is introduced.

Briefly describing such a plurality of extruder tube type evaporator, as shown in Figures 1 and 2, a plurality of tubes 30 arranged in a plurality of rows, and the heat radiation fins 40 interposed between the tubes (30) And a plurality of rows of upper and lower header tanks 10, which are coupled in communication with both ends of the plurality of rows of tubes 30, and have refrigerant passages 14, 14a, 23, 23a communicating with each of the plurality of rows of tubes 30. 20).

In addition, the upper header tank 10 is provided with a baffle 15 for dividing each of the refrigerant passages 14 and 14a, and the tubes 30 arranged in one row on one side of the baffle 15. A plurality of communication holes 13 communicating with each of the refrigerant passages 14 and 14a are formed so that the refrigerant heat exchanged while passing through the front tube row 31 can flow into the rear tube row 32.

In addition, the upper header tank 10 is provided with inlet and outlet pipes (2) (3) so that the refrigerant can be introduced / discharged.

Here, the upper and lower header tanks 10 and 20 are headers 11 and 21 coupled to the ends of the tube 30 and tanks 12 and 22 joined to the headers 11 and 21. )

Meanwhile, the coolant distribution plates 25 are installed in the coolant passages 23 and 23a of the lower header tank 20 at predetermined intervals so that the coolant flowing through the coolant passages 23 and 23a is provided in the respective tubes 30. It is distributed evenly so that it can flow.

Therefore, the refrigerant flows into the refrigerant passage 14 on the front side of the upper header tank 10 through the inlet pipe 2 and then is one tube of the front tube row 31 partitioned by the baffle 15. Flow along the (31) flows into the front refrigerant passage (23) of the lower header tank (20).

The refrigerant flowing into the front refrigerant passage 23 of the lower header tank 20 is U-turned, and this time flows along the other tubes 31 of the front tube row 31 while the front refrigerant of the upper header tank 10 flows. It flows into the passage 14.

Subsequently, the refrigerant flowing into the front refrigerant passage 14 of the upper header tank 10 flows to the adjacent rear refrigerant passage 14a through the plurality of communication holes 13, and then the baffle 15 It flows along one tube 32 of the rear tube row 32 partitioned by and flows into the rear refrigerant passage 23a of the lower header tank 20.

The refrigerant introduced into the rear refrigerant passage 23a of the lower header tank 20 is U-turned and this time flows along the other tubes 32 of the rear tube row 32 while the rear refrigerant of the upper header tank 10 After entering the passage (14a) is discharged through the outlet pipe (3).

However, in the conventional evaporator 1, as the refrigerant flow is complicated and the refrigerant distribution plate 25 installed to uniformly flow the refrigerant is installed at right angles to the flow direction of the refrigerant, the refrigerant pressure drop amount increases. There was a problem that the heat exchange performance is lowered.

An object of the present invention for solving the above-mentioned problems is to form a partition wall having distribution holes of different sizes inside the lower header tank for returning the refrigerant to allow a uniform amount of refrigerant to flow through each tube. The present invention provides a heat exchanger capable of improving the pressure drop on the refrigerant side by improving the distribution and simplifying the refrigerant flow, improving heat exchange performance, and reducing the temperature deviation to uniformize the air temperature passing through the heat exchanger.

In order to achieve the above object, the present invention provides a plurality of tubes having a passage therein and arranged in a plurality of rows, a heat dissipation fin interposed between the tubes, and a tube coupled to one end of the tube and arranged in the plurality of rows. An upper header tank having a plurality of partitioned passages to communicate with each other, and having an inlet and an outlet pipe for inlet / outlet of the heat exchange medium, and coupled to the other end of the tube and communicating with each other in the plurality of rows of tubes. In a heat exchanger comprising a lower header tank for returning a medium, the lower header tank has a refrigerant distribution means for allowing a uniform amount of heat exchange medium to flow to the tube by varying the amount of the heat exchange medium that passes through the tube. Is provided, wherein the refrigerant distribution means is a plurality so as to communicate the inside of the lower header tank and the plurality of tube rows respectively A partition wall bisecting the passageway, is formed on the partition wall is characterized in that balls made of a plurality of distribution are arranged in different sizes as well as each and Sikkim communicating the plurality of passages.

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

Figure 3 is a perspective view showing a heat exchanger according to the present invention, Figure 4 is a cross-sectional view taken along line BB in Figure 3, Figures 5a to 5e is an exploded view showing various embodiments of the refrigerant distribution means installed in the lower header tank of the present invention Perspective view.

The heat exchanger 100 according to the present invention has a predetermined shape flow path therein and a plurality of tubes 130 arranged in a plurality of rows, interposed between the tubes 130 and widening the heat transfer area to promote heat exchange. The heat dissipation fins 140 and upper and lower header tanks 110 and 120 are coupled to each other in communication with both ends of the plurality of rows of tubes 130.

And, in order to protect the tube 130 and the heat dissipation fins 140, the outermost end plate 150 is installed, and both ends of the upper and lower header tanks 110 and 120 are open at both end caps ( 115) (125).

In addition, the tube 130 may be made of an extruded tube, may be made by bonding two plates to each other, or may be made in a variety of forms, such as made by rolling forming.

Thereafter, for convenience, the tubes 130 located at the front side of the plurality of rows of tubes 130 will be referred to as the front tube row 132, and the tubes 130 located at the rear side will be referred to as the rear tube row 131.

On the other hand, the tube 130, the heat dissipation fin 140, the header tank 110, 120, the end plate 150 and the like is bonded by brazing in a pre-assembled state is the manufacture of the heat exchanger 100 is completed.

In the heat exchanger 100, the upper header tank 110 includes a header 111 in which a plurality of tube holes (not shown) are coupled to one end of the plurality of rows of tubes 130, and the header 111. It is composed of a tank having a plurality of partitioned passages (113b) (113a) coupled to seal the one open side of the) and communicates with the front and rear tube rows (132,131) arranged in a plurality of rows independently.

Inlet and outlet pipes 101 and 102 are formed at one side of the upper header tank 110 to communicate with the partitioned inner passages 113b and 113a of the upper header tank 110, respectively.

In the drawing, the inlet pipe 101 is installed on the rear tube row 131 side, and the outlet pipe 102 is installed on the front tube row 132 side, but is not necessarily limited thereto and is installed in various positions. can do.

Therefore, the refrigerant flowing into the one side passage 113a inside the upper header tank 110 through the inlet pipe 101 flows along the rear tube row 131 and returns from the lower header tank 120 and this time. After flowing along the front tube row 132 is introduced into the other passage (113b) inside the upper header tank 110, it is then discharged through the outlet pipe (102).

The lower header tank 120 is coupled to seal a header 121 formed with a plurality of tube holes 121a to be coupled to the other ends of the plurality of rows of tubes 130 and an opened side of the header 121. And a tank 122 for communicating the plurality of rows of tubes 131 and 132 to return the refrigerant.

That is, the lower header tank 120 returns the refrigerant flowing from the inlet pipe 101 and flowing through the rear tube row 131 to the front tube row 132.

In addition, the lower header tank 120 is provided with a refrigerant distributing means 160 to allow a uniform amount of refrigerant to flow through the tubes 130 by varying the amount of refrigerant returned to each position.

The refrigerant distribution means 160 partitions the inside of the lower header tank 120 into a plurality of passages 123b and 123a so as to communicate with the front and rear tube rows 132 and 131, respectively. And a plurality of distribution holes 162 formed on the partition wall 161 to communicate the plurality of passages 123b and 123a and arranged in different sizes.

Here, the partition wall 161 may be formed integrally with the tank 122 of the lower header tank 120 as shown in Figure 5a, in addition to this may be formed integrally with the header 121 as shown in Figure 5b. 5C to 5E, the lower header tank 120 may be combined with a separate member and various shapes.

In addition, the distribution holes 162 may be formed at right angles to the refrigerant flow direction in the lower header tank 120.

In addition, the distribution hole 162 is preferably larger in size toward the far side closer to the inlet pipe 101.

That is, the refrigerant flowing into the one side passage 113a of the upper header tank 110 through the inlet pipe 101 should flow uniformly to each tube 130 of the rear tube row 131, but the inlet by gravity A large amount of refrigerant flows through the tubes 130 located near the pipe 101, and gradually a small amount of refrigerant flows through the tubes 130 located far from the inlet pipe 101.

Therefore, in order to solve this problem, the distribution hole 162 is formed to have a size opposite to the amount of the refrigerant flowing through the tube 130. That is, the size of the distribution hole 162 is reduced on the side close to the inlet pipe 101 through which a large amount of refrigerant flows, and the size of the distribution hole 162 on the side away from the inlet pipe 101 through which a small amount of refrigerant flows. By making it larger, a small amount of refrigerant flows through the small distribution hole 162 on the tube 130 side close to the inlet pipe 101, and a large distribution hole on the side of the tube 130 far from the inlet pipe 101. 162 allows a large amount of refrigerant to flow.

Accordingly, the amount of refrigerant flowing into one of the passages 113a of the upper header tank 110 through the inlet pipe 101 flows directly into the tubes 130 close to the inlet pipe 101, while the inlet is reduced. A sufficient amount is supplied to the pipe 101 and the far tubes 130 so that a uniform amount of refrigerant flows to the entire tubes 130.

In addition, the distribution hole 162 is preferably formed in a quadrangle as shown in the figure, in addition to this can be formed in a variety of shapes, such as circular.

In addition, the size of the distribution hole 162, as described above, it is preferable to gradually increase the size toward the tube 130 on the far side from the tube 130 on the side close to the inlet pipe 101, Figure 5e It can also be formed irregularly. In this case, after testing the heat exchanger 100 to confirm the portion where the actual refrigerant is biased, it is also possible to form a distribution hole 162 of the appropriate size for each position.

Hereinafter, the refrigerant flow of the heat exchanger 100 according to the present invention will be described.

First, the refrigerant flowing into the inlet pipe 101 flows into one side passage 113a communicating with the rear tube row 131 of the upper header tank 110. The refrigerant introduced into the one side passage 113a of the upper header tank 110 flows uniformly into each tube 130 of the rear tube row 131 and flows through the one side passage 123a of the lower header tank 120. Flows into.                     

The refrigerant introduced into one passage 123a of the lower header tank 120 passes through a plurality of distribution holes 162 formed on the partition 161 and moves to the other passage 123b of the lower header tank 120. Subsequently, the refrigerant flows into the other side passage 113b of the upper header tank 110 while uniformly flowing into the respective tubes 130 of the front tube row 132 and finally, the outlet pipe 102 Is discharged through).

Here, the refrigerant flowing along the tubes 130 of the heat exchanger 100 actively exchanges heat with external air passing through the heat exchanger 100 in the course of flowing the rear tube row 131 and the front tube row 132. It will be done.

As described above, the present invention has been described as an example of the evaporator of the heat exchanger 100, in addition to this can be applied to all heat exchangers, such as a radiator, a condenser, a heater core, and the same effect can be obtained.

According to the present invention as described above, by forming a partition having a distribution hole of different sizes in the lower header tank for returning the refrigerant so that a uniform amount of refrigerant flows through each tube, to improve the refrigerant distribution and refrigerant flow By simplifying the pressure drop on the refrigerant side, it is possible to improve the heat exchange performance and to reduce the temperature deviation of the heat exchanger to make the air temperature passed through the heat exchanger uniform.

In addition, by forming the refrigerant distribution means in the lower header tank for returning the refrigerant is easy to manufacture / manufacture.

Claims (3)

A plurality of tubes 130 having a flow path therein and arranged in a plurality of rows, a heat dissipation fin 140 interposed between the tubes 130, and coupled to one end of the tube 130 and arranged in the plurality of rows An upper header tank (110) having a plurality of passages (113a) and (113b) partitioned to communicate with each other, the inlet and outlet pipes (101) and (102) for inlet / outlet of the heat exchange medium; In the heat exchanger comprising a lower header tank 120 coupled to the other end of the tube 130 and communicating the plurality of rows of the tube to return the heat exchange medium, The lower header tank 120 is provided with a refrigerant distribution means 160 so that a uniform amount of heat exchange medium flows to the tube 130 by varying the amount of the heat exchange medium to be returned to the tube 130, The refrigerant distribution means 160 partitions the inside of the lower header tank 120 into a plurality of passages 123a and 123b so as to communicate with the plurality of tube rows, respectively, and on the partition 161. The heat exchanger is formed in the plurality of passages (123a) (123b) to communicate with each other and are arranged in a plurality of distribution holes (162) arranged in different sizes. The method of claim 1, The distribution hole 162 is a heat exchanger, characterized in that the size gradually increases from the side closer to the inlet pipe 101 toward the far side. The method of claim 1, The distribution hole 162 is a heat exchanger, characterized in that formed at right angles to the refrigerant flow direction.

Images