CN109425237B

CN109425237B - Heat exchanger

Info

Publication number: CN109425237B
Application number: CN201710755776.8A
Authority: CN
Inventors: 汪峰; 刘华钊; 刘杰
Original assignee: Zhejiang Dunan Thermal Technology Co Ltd
Current assignee: Zhejiang Dunan Thermal Technology Co Ltd
Priority date: 2017-08-28
Filing date: 2017-08-28
Publication date: 2021-06-22
Anticipated expiration: 2037-08-28
Also published as: CN109425237A

Abstract

The invention provides a heat exchanger. This heat exchanger includes a plurality of flat pipes (1) of arranging along width direction interval, flat pipe (1) is including being located first straight tube section (2) and second straight tube section (3), and connects bend section (4) between first straight tube section (2) and second straight tube section (3), and is adjacent between first straight tube section (2) and adjacent be provided with first heat exchanger fin (5) respectively between second straight tube section (3), bend section (4) department be provided with drain bar (6) that flat pipe (1) closely laminated, drain bar (6) be used for with comdenstion water on the heat exchanger is followed flat pipe (1) is discharged. According to the heat exchanger disclosed by the invention, the problem that condensed water at the bending position of the heat exchanger in the prior art cannot be discharged smoothly can be solved.

Description

Heat exchanger

Technical Field

The invention relates to the technical field of air conditioners, in particular to a heat exchanger.

Background

Chinese patent application publication No. CN1107221A discloses a heat exchanger comprising a plurality of flat tubes arranged side by side at a certain interval in the thickness direction, and a pair of hollow header pipes disposed at both ends of the tubes and communicating with the ends of the tubes, the tubes having a bent portion bent in the width direction of the tubes at a suitable position in the longitudinal direction thereof, and the bent portion being further twisted at a prescribed angle with respect to straight tube portions on both sides thereof, and fins disposed between adjacent straight tube portions.

The problem of double heat exchanger bending has been solved to this kind of structure, but twists reverse 90 degrees owing to the flat pipe of department of bending, it has a changeover portion to twist reverse the region, it has great gap to cause this changeover portion, easy air leakage, influence heat transfer performance, simultaneously because there is not fin protection between the flat pipe of department of bending, flat pipe begins to corrode at first, and other have the place of fin because the fin potential is less than flat pipe, consequently adopt the mode that sacrifices the flat pipe of fin protection to let the fin corrode earlier, consequently this structure has reduced the whole corrosion resisting property of heat exchanger.

In the chinese invention patent application with publication number CN104110977, a heat exchanger is disclosed, which solves the problem of air leakage, but when the heat exchanger is an evaporator or heat pump heat exchanger, the condensed water at the bending section of the flat tube cannot be discharged smoothly, and meanwhile, because no fin protection exists between the flat tubes at the bending position, the flat tubes start to corrode at first, and because the potential of the fins is lower than that of the flat tubes at other places with fins, the fins are corroded at first by adopting the mode of sacrificing the fins to protect the flat tubes, so the structure reduces the corrosion-resistant life of the product.

Disclosure of Invention

The invention aims to provide a heat exchanger to solve the problem that condensed water at a bending position of the heat exchanger in the prior art cannot be discharged smoothly.

In order to solve the technical problems, the invention provides, as one aspect of the invention, a heat exchanger, which includes a plurality of flat tubes arranged at intervals in a width direction, where each flat tube includes a first straight tube section, a second straight tube section, and a bent tube section connected between the first straight tube section and the second straight tube section, first heat exchange fins are respectively arranged between adjacent first straight tube sections and between adjacent second straight tube sections, and a drain plate closely attached to the flat tubes is arranged at the bent tube section, and the drain plate is used for draining condensed water on the heat exchanger along the flat tubes.

According to the heat exchanger, the drain plate is arranged at the bent pipe section and is tightly attached to the flat pipe, so that the air leakage problem can be solved, the heat exchange efficiency of the heat exchanger is improved, and the condensate water discharge problem on the flat pipe in the bent area can be solved.

Drawings

Fig. 1 schematically shows a schematic structural view of a heat exchanger according to a first embodiment of the invention before it is bent;

FIG. 2 schematically illustrates the side view structural diagram of FIG. 1;

fig. 3 schematically shows a bent structure of the heat exchanger according to the first embodiment of the present invention;

FIG. 4 schematically illustrates the side view structural schematic of FIG. 3;

fig. 5 is a schematic view showing the construction of a drain plate of a heat exchanger according to a first embodiment of the present invention;

fig. 6 is a top view structural view schematically showing a drain plate of a heat exchanger according to a first embodiment of the present invention;

FIG. 7 schematically illustrates a schematic construction of a second embodiment of the heat exchanger of the present invention before it is bent;

FIG. 8 schematically illustrates the side view structural schematic of FIG. 7;

FIG. 9 is a schematic view of a second embodiment of the heat exchanger of the present invention after bending;

FIG. 10 schematically illustrates the side view structural schematic of FIG. 9;

FIG. 11 is a schematic side view of a heat exchanger according to a third embodiment of the present invention before it is bent;

FIG. 12 is a schematic side view of a heat exchanger according to a fourth embodiment of the present invention before it is bent;

FIG. 13 is a schematic side view of a heat exchanger according to a fifth embodiment of the present invention before it is bent;

fig. 14 schematically shows a side view of a heat exchanger according to a sixth embodiment of the invention before it is bent.

Reference numbers in the figures: 1. flat tubes; 2. a first straight pipe section; 3. a second straight tube section; 4. bending the pipe section; 5. a first heat exchanger fin; 6. a drain plate; 7. a card slot; 8. a fixing plate; 9. a strip-shaped hole; 10. riveting; 11. and (4) a rivet positioning sleeve.

Detailed Description

The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.

Referring to fig. 1 to 14, according to an embodiment of the present invention, a heat exchanger includes a plurality of flat tubes 1 arranged at intervals in a width direction, the flat tubes 1 include first straight tube sections 2 and second straight tube sections 3 located at two ends, and bend tube sections 4 connected between the first straight tube sections 2 and the second straight tube sections 3, first heat exchange fins 5 are respectively disposed between adjacent first straight tube sections 2 and between adjacent second straight tube sections 3, a drain plate 6 tightly attached to the flat tubes 1 is disposed at the bend tube sections 4, and the drain plate 6 is configured to drain condensed water on the heat exchanger along the flat tubes 1.

According to the heat exchanger, the drain plate 6 is arranged at the bent pipe section 4, the drain plate 6 is tightly attached to the flat pipe 1, so that the air leakage problem can be solved, the heat exchange efficiency of the heat exchanger is improved, the condensate water discharge problem on the flat pipe 1 in the bent area can be solved, when the heat exchanger is used as an evaporator or a heat pump heat exchanger, the condensate water can flow to the flat pipe 1 along the drain plate 6 and then is discharged along the flat pipe 1, the problem of condensate water accumulation on the heat exchanger is avoided, and the heat exchange performance of the heat exchanger is improved.

Preferably, the electric potential of the drain board 6 is lower than that of the flat pipe 1, and in the working process of the heat exchanger, when the bent area is corroded, the drain board 6 with the lower electric potential is corroded preferentially, so that the corrosion of the flat pipe 1 is avoided, and the corrosion resistance of the heat exchanger is improved.

Preferably, drain bar 6 and flat 1 integrative welding of pipe, the drain bar 6 hugs closely flat 1 pipe when can guaranteeing to bend for the heat exchanger preferentially corrodes drain bar 6 when the bend section 4 department takes place to corrode, and protection flat 1 pipe does not receive the environmental corrosion influence.

Referring to fig. 1 to 6 in combination, according to the first embodiment of the present invention, the drain board 6 is a U-shaped bent board, the folded edge of the drain board 6 is provided with a clamping groove 7, and the flat pipe 1 is embedded in the clamping groove 7. The clamping grooves 7 can be in one-to-one correspondence with the flat pipes 1, so that the fixed matching effect of the flat pipes 1 and the drain plates 6 is guaranteed. The quantity of draw-in groove 7 also can be less than flat pipe 1, as long as can guarantee that drain bar 6 chucking is on flat pipe 1 to hug closely flat pipe 1 can.

The drain bar 6 is connected with the flat tube 1 through the clamping groove 7 in a clamped mode, positioning fit between the drain bar 6 and the flat tube 1 is facilitated, and positioning efficiency can be improved. In addition, a clamping fit structure is adopted, so that the fit structure can be simplified, and the processing cost is reduced. When drain bar 6 joint on flat pipe 1 to paste tight cooperation with flat pipe 1 after, just can be in the same place drain bar 6 and flat pipe 1 welded fastening, further guarantee connection structure between the two.

Preferably, the degree of depth h of draw-in groove 7 is less than the width of flat pipe 1, can be so that the comdenstion water when arriving drain bar 6's end, drain bar 6 can not cause the hindrance to the flow of comdenstion water, and the comdenstion water can flow smoothly to flat pipe 1 on, and then discharge along flat pipe 1, consequently is favorable to the comdenstion water to discharge along flat pipe, can effectively solve the comdenstion water emission problem on the regional flat pipe of bending.

Referring to fig. 7 to 10 in combination, according to the second embodiment of the present invention, fixing plates 8 are fixedly provided at both ends of the elbow section 4, and the drain plate 6 is fixedly coupled to the fixing plates 8. In the present embodiment, the fixing plate 8 is added, and the drain plate 6 is not directly connected to the elbow section 4, but is connected to the elbow section 4 through the fixing plate 8. The processing structure of drain bar 6 can be simplified to this kind of mode, reduces the processing cost, is favorable to realizing more that the tight cooperation of pasting of drain bar 6 and the flat pipe 1 of bend section 4. In addition, can be detachable fixed connection between drain bar 6 and the fixed plate 8 to when drain bar 6 corrodes more seriously, can in time change drain bar 6, and need not to change fixed plate 8, can reduce the cost of changing the maintenance, improve and change efficiency.

In addition, fixed plate 8 and drain bar 6 can adopt different materials, for example, the electric potential of fixed plate 8 is higher than the electric potential of drain bar 6, and in this way, can effectively avoid fixed plate 8 to receive the corruption for fixed plate 8 has longer life, can all the time with fixed connection between elbow section 4, and need not to change, further reduces the cost of changing the maintenance.

In this embodiment, fixed plate 8 is the L type board of bending, is provided with draw-in groove 7 on a hem of fixed plate 8, and in flat 1 embedding draw-in groove 7, another hem and the 6 fixed connection of drain bar of fixed plate 8.

Preferably, the other folded edge of the fixing plate 8 is bolted, riveted or welded to the drain plate 6. Another hem of fixed plate 8 can set up in drain bar 6's inboard, also can set up in the outside of drain bar 6, and in this embodiment, another hem setting of fixed plate 8 is in the outside of drain bar 6, consequently need not to bend drain bar 6, just can effectively guarantee that drain bar 6 is whole can laminate on the flat pipe 1 of bend section 4, improves drain bar 6 and flat pipe 1's cooperation effect.

Preferably, the fixing plate 8 is provided with a strip-shaped hole 9 extending along the arrangement direction of the flat tubes 1, and the drain plate 6 is slidably arranged along the length direction of the strip-shaped hole 9. Because drain bar 6 can slide for fixed plate 8, consequently, when carrying out flat tub of prebending, just can make drain bar 6 remove for fixed plate 8 to make flat tub of slope, be favorable to bending flat tub more, be favorable to improving the efficiency of bending.

In the present embodiment, both sides of the drain plate 6 are stacked on the fixing plate 8, and the drain plate 6 and the fixing plate 8 are rivet-fixed by rivets 10.

Preferably, the drain plate 6 is mounted to the anchor plate 8 by a rivet retaining sleeve 11, and the rivet 10 is disposed within the rivet retaining sleeve 11. Set up rivet position sleeve 11 between drain bar 6 and fixed plate 8, its aim at avoids rivet 10 directly to be in the same place drain bar 6 and the riveting of fixed plate 8 for drain bar 6 can remove 8 relative fixed plates, thereby conveniently bends flat pipe 1. The rivet prevents the drain board 6 from being separated from the fixing board 8.

Preferably, the fixing plate 8 is welded to the flat tube 1 in an attached manner, so that the fixing plate 8 can be firmly connected to the flat tube 1.

Referring to fig. 11 in combination, the third embodiment of the present invention is substantially the same as the second embodiment, except that in this embodiment, the other folded edge of the fixing plate 8 is located at the inner side of the drain plate 6, the position where the drain plate 6 is matched with the fixing plate 8 is folded towards the outer side, and the folded height is the thickness of the fixing plate 8, so that the outward folded portion of the drain plate 6 can be attached to the outer side of the other folded edge of the fixing plate 8, and the inner side of the other folded edge of the fixing plate 8 can be flush with the inner side of the drain plate 6, so that the portions where the fixing plate 8 and the drain plate 6 are matched with the flat tube 1 can be closely attached to the flat tube 1, thereby ensuring the condensed water discharge effect of the heat exchanger and the anti-corrosion effect on the flat.

Referring to fig. 12 in combination, the fourth embodiment of the present invention is substantially the same as the third embodiment, except that in this embodiment, the fixing plate 8 and the drain plate 6 are riveted and fixed together by directly using the rivet 10, and no relative displacement occurs between the fixing plate 8 and the drain plate 6, so that the fixing plate 8 and the drain plate 6 can be stably connected, and have better integrity, and can achieve a good matching effect with the flat pipe 1 as a whole.

Referring to fig. 13 in combination, according to a fifth embodiment of the invention, a drain plate 6 is provided at the bend outer side of the bend section 4.

Referring to fig. 14 in combination, a sixth embodiment according to the present invention is substantially the same as the fifth embodiment except that in this embodiment, a drain plate 6 is provided inside the bend of the bent tube section 4.

The above-described embodiments may be combined as necessary, and for example, the structure of the fifth embodiment may be used in combination with the structure of the second embodiment, or may be used in combination with the structure of the fourth embodiment. Also, the structure of the sixth embodiment may be combined with any of the structures of the first to fourth embodiments to form a heat exchanger in various combinations.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a heat exchanger, its characterized in that includes a plurality of flat pipes (1) of arranging along width direction interval, flat pipe (1) includes first straight tube section (2) and second straight tube section (3), and connects bend section (4) between first straight tube section (2) and second straight tube section (3), and is adjacent between first straight tube section (2) and adjacent be provided with first heat exchanger fin (5) between second straight tube section (3) respectively, bend section (4) department be provided with drain bar (6) that bend section (4) of flat pipe (1) closely laminated, drain bar (6) be used for with comdenstion water on the heat exchanger is followed flat pipe (1) is discharged.

2. Heat exchanger according to claim 1, characterized in that the potential of the drain plates (6) is lower than the potential of the flat tubes (1).

3. The heat exchanger according to claim 1, characterized in that the drain plate (6) is welded integrally with the flat tube (1).

4. The heat exchanger according to any one of claims 1 to 3, wherein the drain plate (6) is a U-shaped bent plate, a clamping groove (7) is formed in a folded edge of the drain plate (6), and the flat tube (1) is embedded into the clamping groove (7).

5. The heat exchanger according to claim 4, characterized in that the depth of the clamping groove (7) is smaller than the width of the flat tube (1).

6. The heat exchanger according to any one of claims 1 to 3, characterized in that fixing plates (8) are fixedly arranged at both ends of the bent pipe section (4), and the drain plate (6) is fixedly connected to the fixing plates (8).

7. The heat exchanger according to claim 6, wherein the fixing plate (8) is an L-shaped bent plate, a clamping groove (7) is arranged on one folded edge of the fixing plate (8), the flat tube (1) is embedded into the clamping groove (7), and the other folded edge of the fixing plate (8) is fixedly connected with the drainage plate (6).

8. The heat exchanger according to claim 7, characterized in that the other fold of the fixing plate (8) is bolted, riveted or welded to the drain plate (6).

9. The heat exchanger according to claim 7 or 8, characterized in that the fixing plate (8) is provided with a strip-shaped hole (9) extending along the arrangement direction of the flat tubes (1), and the drain plate (6) is slidably arranged along the length direction of the strip-shaped hole (9).

10. The heat exchanger according to claim 9, characterized in that the drain plate (6) is superimposed on the fixing plate (8) on both sides, the drain plate (6) and the fixing plate (8) being riveted by rivets (10).

11. The heat exchanger according to claim 10, characterized in that the drain plate (6) is mounted on the fixing plate (8) by means of a rivet retaining sleeve (11), the rivet (10) being arranged in the rivet retaining sleeve (11).

12. The heat exchanger according to claim 7, 8, 10 or 11, characterized in that the holding plate (8) is welded in abutment with the flat tubes (1).

13. The heat exchanger according to any of claims 1 to 3, characterized in that the drain plate (6) is arranged inside or outside the bend of the bent tube section (4).