KR20040019432A - Heat exchanger - Google Patents

Abstract

PURPOSE: A heat exchanger is provided to improve heat-transferring capacity and increase the structural strength by integrally forming a plurality of fin members to a tube member connected and combined between a pair of header pipes. CONSTITUTION: A heat exchanger is composed of a pair of header pipes(2) including inlet/outlet pipes to flow in and discharge refrigerants and being parallel to each other; a tube member(21) having a bent unit on the surface and a plurality of independent refrigerant passages(22) formed at the inside in the direction of crossing the direction of air flow; and a refrigerant tube(20) comprising a plurality of fin members(24) protruded on the surface of the tube member at regular intervals in the longitudinal direction of the tube member. The refrigerant tube is connected and combined between a pair of header pipes.

Description

Heat exchanger

The present invention relates to a heat exchanger, and more particularly, to a heat exchanger capable of improving heat transfer performance and increasing overall structural rigidity by integrally forming a plurality of fin members in a tube member connected / coupled between a pair of header pipes. It is about.

An air conditioner, especially an automobile air conditioner, compresses a working fluid flowing in a flow path at a high temperature and a high pressure in a compressor, and condenses the working fluid compressed at a high temperature and a high pressure with a liquid in a condenser to condense it into a liquid state. By heat-exchanging the working fluid with the external air in the evaporator, that is, the working fluid in the evaporator absorbs the external air heat and lowers the temperature of the surrounding air, thereby cooling the inside of the car by cooling the outside air into the vehicle interior. .

As such, the condenser and evaporator for exchanging the working fluid with the outside air is commonly referred to as a heat exchanger.

These heat exchangers are not only used in the cooling device as described above, but because the working fluid flowing inside is used in the heating device by heating the external air, various heat exchangers are manufactured according to the purpose and purpose of use. A condenser is shown for condensing the working fluid into the liquid state.

In this condenser, a plurality of refrigerant tubes 3 are fixed in parallel between a pair of header pipes 2 installed in parallel with each other in a common heat exchanger, and a working fluid is inside the two header pipes 2. A plurality of baffles 5 are suitably installed to pass through the refrigerant tubes 3 in a series of compartments, and a fin member 4 having a large heat transfer area is provided between the refrigerant tubes 3. It is fixed and the outermost refrigerant tube (3) is provided with an end plate (8) for protecting the fin member (4).

The flow path of the working fluid in the condenser configured as described above is indicated by the arrow in the figure. That is, the gaseous working fluid introduced into the inlet pipe 6 is zigzag-passed through the coolant tubes 3 in each compartment with a boundary between a plurality of baffles 5 fixed to both header pipes 2. While performing heat exchange with the outside air is phase-changed into a liquid state and discharged to the outlet pipe (7).

As such, the working fluid performs heat exchange with external air while flowing through the coolant tube 3. In this flow process, since the phase changes from the gaseous phase to the liquid phase, it has a very complicated flow form.

As described above, the working fluid in which the phase change from the gas phase to the liquid phase changes the phase to a more complete liquid state by more actively exchanging heat with external air when the refrigerant tube 3 flows.

The conventional refrigerant tube (3) for this purpose is to form a plurality of single channel 10 by dividing the inner space of the body into a plurality of partitions 9, as shown in Figure 2, the fin member (4) on the upper and lower outer surface It will be brazed.

Therefore, the partitions 9 serve to increase the heat transfer performance of the internal fluid by diversifying the hydraulic diameter of the refrigerant tube 3, and also serve to support durability of the upper and lower surfaces to maintain durability even when the pressure rises.

Accordingly, the working fluid flows into the inlet pipe 6 and passes through the coolant tube 3 so as to collide with both partition walls 9 of the single channel 10 to exchange heat with external air. As it continues, it gradually changes into a liquid state and changes to a liquid state when it is discharged to the outlet pipe 7.

By the way, the conventional refrigerant tube (3) is very high efficiency to increase the heat transfer effect inside, but because of the simple flat surface on the outside there is a limit to the heat transfer effect of the inside to increase the amount of heat dissipation. That is, since the outer heat transfer effect depends entirely on the fin member 4 which is manufactured and assembled separately, if the fin member 4 does not perform its function smoothly, a direct decrease in heat dissipation is caused.

In addition, when dew is formed on the surface of the refrigerant tube 3 during the heat transfer process, since there is no structural prevention device that prevents the phenomenon of being scattered by the flow of air, it is damaging to other devices around the heat exchanger. .

An object of the present invention for solving the above-mentioned problems is to form a plurality of bent portions on the outer surface of the tube member and at the same time to form a plurality of fin members integrally protruding in the longitudinal direction on the tube member outer surface on the refrigerant flow path, In order to effectively improve the heat transfer to the air side passing between each of the refrigerant tube, and to reduce the phenomenon of dew condensation on the surface of the refrigerant tube and to provide a thermal bridge which can also increase the structural rigidity of the entire heat exchanger have.

Accordingly, the present invention includes a pair of header pipes installed in parallel with each other and the inlet and outlet pipes are installed to allow the refrigerant to flow in and out; A tube member having a bent portion formed on a surface thereof and having a plurality of independent refrigerant passages in a direction crossing the air flow direction; And a refrigerant tube made up of a plurality of fin members protruding at a predetermined interval in the longitudinal direction of the tube member on the surface of the tube member.

1 is an overall perspective view showing a general heat exchanger,

2 is a partial perspective view showing a state in which a heat dissipation fin is interposed in a conventional refrigerant tube;

Figure 3 is a partial perspective view showing a state in which the pin member is formed up and down in the tube member according to an embodiment of the present invention,

4 to 9 is a view showing a refrigerant tube according to another embodiment of the present invention.

10 is a partial perspective view of a heat exchanger to which a refrigerant tube according to the present invention is applied;

11 is a cross-sectional view showing a refrigerant tube of FIG.

12 is a cross-sectional view showing a state in which a fin member of a refrigerant tube is joined to an outer surface of a tube member of another adjacent refrigerant tube.

<Description of Signs of Major Parts of Drawings>

1: heat exchanger 2: header pipe

3,20: refrigerant tube 4,24: fin member

5: baffle 6: inlet pipe

7: outlet pipe 8: end plate

21: tube member 22: refrigerant flow path

23: bend

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

The same parts as in the prior art are denoted by the same reference numerals, and repeated description thereof will be omitted.

3 is a partial perspective view showing a state in which the fin member is formed up and down in the tube member according to an embodiment of the present invention, Figures 4 to 9 are views showing a refrigerant tube according to another embodiment of the present invention.

First, the heat exchanger 1 according to the present invention has a plurality of refrigerant tubes between a pair of header pipes 2 installed in parallel with each other, in which the inlet and outlet pipes 6 and 7 are installed to allow the refrigerant to flow in and out. A plurality of baffles (5) are suitably fixed in parallel, and a plurality of baffles (5) are suitably arranged inside the header pipes (2) so that a working fluid can zigzag pass the refrigerant tubes (20) in a series of compartments. The outermost refrigerant tube 20 is provided with an end plate 8 that protects the fin members 24 of the refrigerant tube 20.

In the heat exchanger 1, one embodiment of the refrigerant tube 20, as shown in Figure 3, a plurality of bent portions 23 are formed on the upper and lower surfaces symmetrically and the outermost side Are each formed to be closed, and each of the tube member 21 having a plurality of independent refrigerant flow passages 22, respectively formed by connecting the inside of each of the bent portion (23); It is composed of a plurality of fin members 24 are formed to protrude at a predetermined interval in the longitudinal direction on the outer surface of the tube member 21 on the refrigerant passage 22 to widen the heat transfer area of the tube member 21.

Here, the fin members 24 are not formed on the surface of the tube member 21 on another neighboring refrigerant flow path 22. That is, the pin members 24 are formed to be spaced apart by a predetermined distance in the width direction of the tube member 21.

In addition, the fin member 24 may be formed on both the upper and lower sides of the tube member 21, or may be formed only in one direction of the upper and lower sides.

In addition, the refrigerant passages 22 are all formed horizontally on the same line and are preferably formed in a direction crossing the air flow direction.

Therefore, the working fluid passing through the refrigerant passage 22 of the refrigerant tube 20 is gradually cooled while performing heat exchange with external air. At this time, the air passes between the plurality of fin members 24. By hitting the pin members 24, the heat transfer is effectively improved.

In addition, since the plurality of fin members 24 form a predetermined area to cross with respect to the air flow direction, a portion where air directly collides is wider than a conventional fin member 4, thereby improving heat exchange performance. The tube member 21 is also to improve the heat exchange performance by widening the contact area with the air through the bent portion (23).

4 to 9 will be described only for the configuration different from the above-described embodiment.

Figure 4 is a cross-sectional view showing a refrigerant tube according to another embodiment of the present invention, as shown, the height of the fin member 24 arranged in the air flow direction on the upper and lower outer surface of the tube member 21 mutually It is formed differently.

Therefore, as the air passing through the fin member 24 passes in the form of turbulence, the heat exchange is further increased.

In addition, in the pin member 24 of the pin member 24, the height of which is slightly lower, it is possible to reduce the resistance of the air by allowing the air to pass through without resistance.

5 is a plan view showing a refrigerant tube according to another embodiment of the present invention. As shown in the drawing, the plurality of fin members 24 are longitudinally formed on the outer surface of the tube members 21 on all the refrigerant passages 22. It is to be formed at a predetermined interval to protrude.

Accordingly, the fin members 24 form more heat transfer area than the above-described embodiment, thereby further improving heat exchange performance.

FIG. 6 is a plan view showing a refrigerant tube according to another embodiment of the present invention. As shown in FIG. 5, the plurality of fin members 24 are the tube members 21 on all the refrigerant passages 22, as shown in FIG. ) It is to be formed to protrude at regular intervals in the longitudinal direction on the outer surface. However, the fin members 24 formed in the tube members 21 on the refrigerant passages 22 are formed in a zigzag shape with respect to the air flow direction.

Accordingly, the air passing through the zigzag-shaped fin members 24 is increased to increase the heat transfer area where air directly hits the fin members 24 described above with reference to FIG. 5 to further improve heat exchange performance.

7 is a plan view showing a refrigerant tube according to another embodiment of the present invention. As shown in FIG. 5, the fin member 24 has the same structure as that described with reference to FIG. 5, but is arranged in the longitudinal direction in the tube member 21. Is formed in a zigzag shape.

Therefore, when the tube member 21 is deformed in the longitudinal direction due to the weight of the tube member 24 itself or compression for temporary assembly, the fin member 24 of the other tube member 21 adjacent to the fin member 24 is formed. 24) to prevent overlapping or pinching problems.

8 is a partial perspective view showing a refrigerant tube according to another embodiment of the present invention, as shown in the figure, a plurality of refrigerant passages 22 are arranged in a zigzag shape in the tube member 21 and each of the refrigerant passages On the surface of the upper and lower outermost tube members 21 on the 22, a plurality of fin members 24 are formed at a predetermined interval in the longitudinal direction. That is, the fin member 24 is formed alternately up and down on the outer surface of the tube member 21 on each refrigerant passage 22.

Therefore, the air passing through the zigzag-shaped tube member 21 flows along the zigzag-shaped bends 23, whereby the heat transfer area is increased, thereby improving heat exchange performance.

9 is a partial perspective view of a refrigerant tube according to another embodiment of the present invention, as shown in FIG. 8, which has a structure similar to that described in FIG. 8, except that the heat transfer area of the tube member 21 is increased. A section in which the refrigerant passages 22 of the tube member 21 are periodically repeated in a zigzag form is made larger than the structure of FIG. 8. Here, the refrigerant passages 22 are arranged in the same line by at least two or more.

The fin members 24 are alternately formed up and down on the outer surface of the tube member 21 on each refrigerant passage 22.

Therefore, the air passing through the tube member 21 flows along the curved surface 23 that is zigzag-shaped, so that the heat transfer area is further increased to improve heat exchange performance.

10 is a partial perspective view of a heat exchanger to which a refrigerant tube according to the present invention is applied, and FIG. 11 is a cross-sectional view illustrating a refrigerant tube in FIG. 10, in which all of the refrigerant passages 22 are formed horizontally on the same line. The upper and lower outer surfaces of the 21, the fin member 24 in the longitudinal direction is shown as an example that the refrigerant tube 20 protruding at a predetermined interval is applied.

As shown, a plurality of refrigerant tubes 20 are fixedly installed in parallel between a pair of header pipes 2 installed in parallel with each other, and a working fluid is provided inside the header pipes 2 on both sides. A plurality of baffles 5 are appropriately installed so as to pass zigzag in a series of partition units, and the outermost refrigerant tube 20 protects the fin members 24 of the refrigerant tube 20. An end plate 8 is installed.

In addition, the fin members 24 of the refrigerant tube 20 are in contact with the fin members 24 of the other refrigerant tube 20 adjacent to increase the structural rigidity of the entire heat exchanger 1.

In addition, the working fluid flowing in the coolant passage 22 of the coolant tube 20 exchanges heat with an air side passing between the coolant tube 20 and the fin members 24.

FIG. 12 is a cross-sectional view illustrating a connection relationship between the refrigerant tubes formed in a zigzag arrangement with a plurality of refrigerant passages described with reference to FIG. 8 and other refrigerant tubes adjacent to each other. The fin member 24 protruding up and down alternately on the surface is in contact with the outer surface of the tube member 21 of another adjacent refrigerant tube 20.

Accordingly, the thickness in the width direction of the fin member 24 when the fin member 24 of the refrigerant tube 20 described above with reference to FIGS. 10 and 11 and the fin member 24 of the other refrigerant tube 20 are in contact with each other. To solve the problem that the pin members 24 which are in contact with each other by being thin is stably in contact with each other, the pin members 24 are in contact with the outer surface of the tube member 21 of another adjacent refrigerant tube 20.

Thus, the air-side passage passing between the refrigerant tube 20 is stably secured and the structural rigidity of the heat exchanger 1 as a whole can be further increased.

According to the heat exchanger 1 of the present invention as described above, the header pipe (2) and the inlet and outlet pipe (6) (7) and the refrigerant tube 20, the end plate (8), etc. in a state of pre-assembled brazing furnace It is put into the brazing joint.

Accordingly, the gaseous working fluid introduced into the inlet pipe 6 is zigzag-passed through the refrigerant tubes 20 in each section unit by the boundary between a plurality of baffles 5 fixed to both header pipes 2. While performing heat exchange with the outside air is phase-changed into a liquid state and then discharged to the outlet pipe (7).

In addition, the refrigerant tube 20 of the present invention has a plurality of bent portions 23 on the surface of the tube member 21, and the fin members 24 are integrally formed on the outer surface of the tube member 21 on each refrigerant passage 22. In this case, the heat transfer effect with the air side passing through the refrigerant tube 20 is improved.

In addition, when the air passes between the plurality of tube members 21 arranged in a zigzag arrangement of the refrigerant flow passage 22, the air flows along the bent portion 23 of the outer surface of the tube member 21, the fin In addition to the members 24, the heat transfer performance of the working fluid flowing in the refrigerant passage 22 is improved to maximize the heat exchange performance.

When dew is formed on the surface of the tube member 21, the dew is scattered by the fin members 24 having a surface crossing the bent portion 23 of the tube member 21 with respect to the air flow direction. Will be prevented.

According to the heat exchanger of the present invention configured as described above, the bent portion is formed on the surface of the tube member or the coolant flow path of the tube member is arranged in a zigzag shape, and the outer surface of the tube member on the coolant flow path has a plurality of longitudinal directions. By integrally protruding the fin members, heat transfer to the air side passing between the respective refrigerant tubes is improved, and heat exchange performance is increased.

In addition, by contacting the fin member or the tube member of the other refrigerant tube adjacent to the fin member of the refrigerant tube, the air-side passage passing between the refrigerant tube is secured stably and the structural rigidity of the entire heat exchanger is further increased.

In addition, it is possible to prevent dew from occurring on the surface of the tube member by the fin members having a surface intersecting the bent portion of the tube member surface with respect to the air flow direction.

Claims (8)

A pair of header pipes 2 provided with inlet and outlet pipes 6 and 7 so that refrigerant can be introduced / exhausted and installed in parallel with each other; A tube member 21 having a bent portion 23 formed on a surface thereof and having a plurality of refrigerant passages 22 that are independent in a direction crossing the air flow direction; And Refrigerant tube 20 consisting of a plurality of fin members 24 protruding at a predetermined interval in the longitudinal direction of the tube member 21 on the surface of the tube member 21; consists of the pair of header pipe (2) Heat exchanger characterized in that coupled to each other. The heat exchanger (1) according to claim 1, wherein the refrigerant passages (22) are arranged in parallel with each other. The heat exchanger according to claim 1, wherein each of the refrigerant passages (22) is arranged in a zigzag shape. 3. The heat exchanger according to claim 1 or 2, wherein heights between the fin members (24) arranged in the air flow direction among the fin members (24) are different from each other. The heat exchanger according to claim 1, wherein the fin members (24) arranged in the air flow direction among the fin members (24) are arranged in a zigzag shape. The heat exchanger according to claim 1, wherein the fin members (24) arranged in the longitudinal direction of the tube member (21) among the fin members (24) are arranged in a zigzag shape. The heat exchanger according to claim 1, wherein the refrigerant tube (20) is joined to the fin member (24) of the fin member (24) and other refrigerant tubes (20) located above and below the fin member (24). The heat exchanger according to claim 1, wherein the refrigerant tube (20) is joined to the fin member (24) and the outer circumferential surface of the tube member (21) of the other refrigerant tubes (20) located above and below the fin member (20).