CN201425433Y

CN201425433Y - Micro-channel heat exchanger

Info

Publication number: CN201425433Y
Application number: CN2009200035984U
Authority: CN
Inventors: 刘华钊; 李开泉; 黄宁杰; T·格哈特
Original assignee: Danfoss Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd
Current assignee: Sanhua Holding Group Co Ltd; Sanhua Hangzhou Micro Channel Heat Exchanger Co Ltd; Danfoss AS
Priority date: 2009-01-20
Filing date: 2009-01-20
Publication date: 2010-03-17
Anticipated expiration: 2019-01-20

Abstract

The utility model provides a micro-channel heat exchanger, which comprises at least two collecting pipes, a slot which respectively passes through the collecting pipes, a plurality of flat pipes whichare inserted into the collecting pipes, and at least two connection pipes which are connected with the collecting pipes and are used for inputting or outputting refrigerant. The micro-channel heat exchanger also comprises an anti-drag plate with one or more openings which is arranged inside the collecting pipes, the anti-drag plate divides the interior of the collecting pipe into an upper cavityand a lower cavity, which extend in the length direction of the collecting pipe, the flat pipe is free from being inserted into the lower cavity, and the connection pipe is communicated with the fluidinside the flat pipe through the lower cavity. By particularly arranging the anti-drag plate inside the collecting pipe, the refrigerant flows in the lower cavity which is rather smooth when flowinginside the collecting pipes and is free from being blocked by the flat pipe, and the pressure loss is greatly reduced, so the work energy consumption of the air conditioning device can be effectivelyreduced.

Description

Micro-channel heat exchanger

Technical field

The utility model relates to the air-conditioning equipment technology, relates to a kind of micro-channel heat exchanger that is used for air-conditioning equipment particularly.

Background technology

Traditional air-conditioning equipment adopts fin-tube heat exchanger usually, and this heat exchanger is made of coiled pipe and the fin that is through on the coiled pipe, and modal is the structure that a kind of copper pipe is worn aluminous fin outward.This traditional fin-tube heat exchanger exists that heat exchange efficiency is lower, bulky, cold-producing medium easily leaks into to cause in the atmosphere between environmental problem and/or coiled pipe and fin easily because of corrosion and separates or the like shortcoming.For many years, the technical staff just is being devoted to develop the various micro-channel heat exchangers that are applicable to air-conditioning equipment, improving heat exchange efficiency, and overcomes the various shortcomings of traditional fin-tube heat exchanger simultaneously.

In the air-conditioning equipment field, the micro-channel heat exchanger of prior art generally comprises the flat tube of header, microchannel form and the heat exchange fin between the flat tube.Wherein, the cross section of header is generally circle, and the cross section of flat tube is generally approximate rectangular.And, on the tube wall of header one side, be formed with for flat tube and be inserted into slot in the header.Flat tube in inserting header after, the slot on flat tube and the header tube wall is welded, with fixing flat tube and the header inner space and the external world are sealed.

In the micro-channel heat exchanger of prior art,, flat tube must be inserted into position darker in the header (that is, the length that stretches in the header of flat tube is longer) because the flat tube hole is not blocked by solder flux will guarantee the welding of header and flat tube the time.And this can be subjected to the bigger obstruction of flat tube will cause cold-producing medium to flow the time in header, produces greater loss.Therefore, say that compressor need provide more power, cause the bigger energy consumption of whole air-conditioning system for whole air-conditioning system.

The utility model content

A purpose of the present utility model is intended to reduce the pressure loss that cold-producing medium causes because of resistance when the header internal flow, reduce the work energy consumption of air-conditioning equipment, improves system effectiveness.

A further purpose of the present utility model is intended to realize the above-mentioned improved while, do not change the structure of existing header and/or flat tube itself as far as possible, thereby make it possible to continue to use existing process equipment, header and flat tube etc., the cost of minimization technique upgrading.

Particularly, the utility model provides a kind of micro-channel heat exchanger, and it comprises that at least two headers, the slot that passes on the described header respectively are inserted into many flat tubes in the described header and are connected at least two tube connectors (also can be described as and import and export pipe) that described header is used to input or output cold-producing medium.Especially, described micro-channel heat exchanger also comprises the drag reduction plate that has one or more opening that is arranged in the described header, described drag reduction plate is separated out epicoele and the cavity of resorption that extends along the length direction of described header in described header, and described flat tube is not inserted in the described cavity of resorption, and described tube connector is communicated with described flat tube fluid via described cavity of resorption.

In one embodiment, the end of described flat tube can be configured to be in the described epicoele, and exists at interval with the upper surface of described drag reduction plate.

Preferably, the opening in the described drag reduction plate is a plurality of through holes along the length direction thickness direction that arrange, that run through described drag reduction plate of described drag reduction plate.

Preferably, described drag reduction plate is to be selected from a kind of in flat board, arc plate and the curved slab.

In another embodiment, the opening in the described drag reduction plate is a plurality of slotted eyes that run through the thickness direction of described drag reduction plate, and described a plurality of slotted eyes are arranged to aim at corresponding slot on the described header respectively along the length direction of described drag reduction plate.

Preferably, the end of each described flat tube is inserted into respectively in the described drag reduction plate in the corresponding slotted eye.

Preferably, described slotted eye is undertaken by the described drag reduction plate to flat type that punching press forms.

Preferably, described slotted eye can have the flange that punching press forms towards a side of described cavity of resorption, to help to keep inserting the end of the described flat tube in the described slotted eye.

Preferably, it is concordant with the end face of described flange to insert the end face of end of the described flat tube in the described slotted eye.

In summary it can be seen, micro-channel heat exchanger of the present utility model is by being provided with the drag reduction plate especially in header, cold-producing medium mainly is mobile by the cavity of resorption of smoother when the header internal flow, the obstruction that has not had flat tube, the pressure loss significantly reduces, thereby reduced the work energy consumption of air-conditioning equipment effectively, improved system effectiveness.

Reference numeral used herein is as follows:

100 micro-channel heat exchangers according to the utility model first embodiment

200 micro-channel heat exchangers according to the utility model second embodiment

10 headers

14 slots

16 flat tubes

18 fins

20 side plates

22 end caps

24 tube connectors

30 drag reduction plates

31 flange

32 through holes

32 ' slotted eye

34 epicoeles

36 cavity of resorptions

According to detailed description hereinafter, those skilled in the art will understand other purposes of the present utility model, advantage and feature more.

Description of drawings

Hereinafter with reference to the accompanying drawings and in exemplary and nonrestrictive mode the utility model is described in detail.Identical Reference numeral is represented same or analogous parts or part in the accompanying drawing, wherein:

Fig. 1 is the schematic diagram according to the micro-channel heat exchanger of the utility model first embodiment, wherein for clarity sake, only shows near part flat tube and the fin that is positioned at the header two ends for the fin between many flat tubes that are arranged in parallel and flat tube;

Fig. 2 is the schematic left end view of the micro-channel heat exchanger of Fig. 1;

Fig. 3 is the schematic local amplification view of regional A among Fig. 1;

Fig. 4 is along the schematic local amplification view that mark B-B obtains that dissects among Fig. 3;

Fig. 5 is the schematic top view of drag reduction plate among Fig. 1;

Fig. 6 is the schematic end of drag reduction plate among Fig. 5;

Fig. 7 is the schematic side elevation of drag reduction plate among Fig. 5;

Fig. 8 is the schematic diagram according to the micro-channel heat exchanger of the utility model second embodiment, wherein for clarity sake, only shows near part flat tube and the fin that is positioned at the header two ends for the fin between many flat tubes that are arranged in parallel and flat tube;

Fig. 9 is the schematic left end view of the micro-channel heat exchanger of Fig. 8;

Figure 10 is the schematic local amplification view of zone C among Fig. 8;

Figure 11 is the schematic top view of drag reduction plate among Fig. 8;

Figure 12 is the schematic side elevation of drag reduction plate among Fig. 8;

Figure 13 is the schematic local amplification view of area E among Figure 12;

Figure 14 is along the schematic local amplification view that mark D-D obtains that dissects among Figure 11.

The specific embodiment

Fig. 1 and Fig. 8 show respectively according to the micro-channel heat exchanger 100 of the utility model first embodiment with according to the micro-channel heat exchanger 200 of the utility model second embodiment.As shown in these figures, micro-channel heat exchanger 100 it comprise that at least two headers 10, the slot 14 that passes on the described header respectively are inserted into the many flat tubes 16 in the described header and are connected at least two tube connectors 24 that described header is used to input or output cold-producing medium.

Flat tube 16 in inserting header 10 after, generally also to weld between flat tube 16 and the slot 14 and fix and seal.And shown in Fig. 1-2 or Fig. 8-9,

micro-channel heat exchanger

100 and 200 preferably is provided with end cap 22 at the two ends of its header, and tube connector 24 is that the hole of passing in the end cap 22 is communicated with header.In addition, between the flat tube that generally is arranged in parallel 16 of

micro-channel heat exchanger

100 and 200, be provided with heat exchange fin 18.And at the general preferred side plate 20 that is provided with in the outside of the fin 18 at two ends, the left and right sides.These parts and structure well known to a person skilled in the art that all this paper is not for a more detailed description to it.

Especially, according to for example also including in micro-channel heat exchanger 100 of the present utility model and 200 by inserting or the connector mode is arranged on the drag reduction plate 30 that has one or more opening in the header 10.Described opening preferably is formed on the drag reduction plate 30 by die-cut or Sheet Metal Forming Technology, and can have or not have flange (this will describe hereinafter in more detail).

Drag reduction plate 30 is separated out epicoele 34 and the cavity of resorption 36 that the length direction (promptly the longitudinal axis direction of this pipeline is a horizontal direction) along header 10 extends in Fig. 1 in header 10, and the end of each flat tube 16 all is not inserted in the cavity of resorption 36.Tube connector 24 is communicated with flat tube 16 fluids via cavity of resorption 36.

In the micro-channel heat exchanger 100 according to the utility model first embodiment, the end of flat tube 10 can be configured to be in the epicoele 34 and (promptly end in the epicoele 34), and and the upper surface of drag reduction plate 30 between have certain intervals.

Further, referring to Fig. 3-7, the opening in the drag reduction plate 30 of micro-channel heat exchanger 100 specifically can be configured to along a plurality of through holes 32 of the length direction thickness direction that arrange, that run through drag reduction plate 30 of drag reduction plate 30, and these through holes preferably do not have the punching press flange.

Through hole on the drag reduction plate 30 can be arranged in the form of any desired, for example various random spread patterns or regular spread pattern.For example, all through holes 32 on the drag reduction plate 30 can be aimed at the end face of flat tube 16 respectively.Again for example, on drag reduction plate 30 with the end face of flat tube 16 over against the zone in a plurality of through holes 32 of a row can correspondingly be set, like this cold-producing medium that ejects from flat tube 16 some can be directly from these over against through hole 32 enter cavity of resorption 36, and in this embodiment, can also be on drag reduction plate 30 in the zone between the flat tube 16 some through holes 32 are set dispersedly, remaining cold-producing medium can flow into cavity of resorption from these through holes 32.

And the diameter of each through hole 32 can be identical or inequality.The density degree of through hole 32 also can be different, for example can be arranged in apart from the tube connector mouth of pipe more at a distance, and through hole is close more, or the like.In some cases, for example, for the balance resistance, the diameter of through hole 32 can be configured to far away more apart from the mouth of pipe of tube connector 24, and diameter is big more; Perhaps, the diameter of all through holes can be arranged to identically, but in the mouth of pipe of distance tube connector 24 place far away more, the quantity of through hole 32 is many more.

In addition, in the micro-channel heat exchanger 100 according to the utility model first embodiment, drag reduction plate 30 can be flat board, arc plate or curved slab.

Referring to Fig. 8-14, in the micro-channel heat exchanger 200 according to the utility model second embodiment, the opening in the drag reduction plate 30 preferably is set to run through a plurality of slotted eyes 32 ' (also can be described as slot) of drag reduction plate 30 thickness directions.These slotted eyes 32 ' be arranged to aim at corresponding slot 14 on the header 10 respectively along the length direction of drag reduction plate 30, thereby after making that the end of each flat tube 16 slot on passing header 10 inserts in the header 10, can be continued the slotted eye 32 of respective aligned in the insertion drag reduction plate 30 ' in.

Preferably, slotted eye 32 ' be is undertaken by the drag reduction plate 30 to flat type that punching press forms, and at slotted eye 32 ' preferably have the flange 31 that punching press forms towards a side of cavity of resorption 36, with help to keep or clamp insert slotted eye 32 ' in the end of flat tube 16.Especially, the end of flat tube 16 insert slotted eye 32 ' in after, preferred should be with slotted eye 32 ' and flat tube 16 welds together epicoele 34, and to make the inner chamber of complete closed (be drag reduction plate 30 and the inwall of header 10, the inwall of end cap 22 and flat tube 16 welding, form the closed inner chamber of isolating fully), that is to say, preferably can not make epicoele 34 and cavity of resorption 36 sealing or isolation fully to each other, if because if make between epicoele 34 and the cavity of resorption 36 sealing fully or isolation epicoele 34 make the inner chamber of complete closed, when working so at epicoele 34 and cavity of resorption 36 big pressure reduction will appear, and may cause parts damages such as drag reduction plate 30, if epicoele 34 residual gas, in a single day leak between epicoele 34 and the cavity of resorption 36, then residue gas cognition enters refrigerant system, influences systematic function.Those of skill in the art would recognize that in the utility model, can not form sealing fully between the flat tube 16 of slotted eye 32 that punching press forms ' itself also be preferably shaped to not and essentially rectangular.

Further, it is preferred at most concordant with the end face of flange 31 to insert the end face of end of flat tube 16 of slotted eye 32 ' interior.

In addition, in each embodiment of the present utility model, as required, can be with welding together (but drag reduction plate 30, header 10, end cap 22 and flat tube can not be welded together to form closed inner chamber simultaneously) between drag reduction plate 30 and header 10 and/or end cap 22 and/or the flat tube 16, so that drag reduction plate 30 is securely fixed in the header.

Though this paper has illustrated and has described a plurality of exemplary preferred embodiment of the present utility model, but those skilled in the art can derive other embodiment that meet the utility model principle in view of the above, and all these embodiment should be considered to fall in the scope of the present utility model.

Claims

1. micro-channel heat exchanger, comprise that at least two headers, the slot that passes on the described header respectively are inserted into many flat tubes in the described header and are connected at least two tube connectors that described header is used to input or output cold-producing medium, it is characterized in that

Described micro-channel heat exchanger also comprises the drag reduction plate that has one or more opening that is arranged in the described header, described drag reduction plate is separated out epicoele and the cavity of resorption that extends along the length direction of described header in described header, and described flat tube is not inserted in the described cavity of resorption, and described tube connector is communicated with described flat tube fluid via described cavity of resorption.

2. micro-channel heat exchanger according to claim 1 is characterized in that the end of described flat tube is in the described epicoele, and exists at interval with the upper surface of described drag reduction plate.

3. micro-channel heat exchanger according to claim 1 and 2 is characterized in that, the opening in the described drag reduction plate is a plurality of through holes along the length direction thickness direction that arrange, that run through described drag reduction plate of described drag reduction plate.

4. micro-channel heat exchanger according to claim 3 is characterized in that, described drag reduction plate is to be selected from a kind of in flat board, arc plate and the curved slab.

5. micro-channel heat exchanger according to claim 1, it is characterized in that, opening in the described drag reduction plate is a plurality of slotted eyes that run through the thickness direction of described drag reduction plate, and described a plurality of slotted eyes are arranged to aim at corresponding slot on the described header respectively along the length direction of described drag reduction plate.

6. micro-channel heat exchanger according to claim 5 is characterized in that, the end of each described flat tube is inserted into respectively in the described drag reduction plate in the corresponding slotted eye.

7. micro-channel heat exchanger according to claim 5 is characterized in that, described slotted eye is to carry out punching press by the described drag reduction plate to flat type to form.

8. micro-channel heat exchanger according to claim 5 is characterized in that, described slotted eye has the flange that punching press forms towards a side of described cavity of resorption, to help to keep inserting the end of the described flat tube in the described slotted eye.

9. micro-channel heat exchanger according to claim 8 is characterized in that, the end face of end that inserts the described flat tube in the described slotted eye is concordant with the end face of described flange.