CN201885609U

CN201885609U - Parallel flow heat exchanger

Info

Publication number: CN201885609U
Application number: CN2010201028270U
Authority: CN
Inventors: 邓斌; 吴扬; 米丽娟
Original assignee: SHANGHAI GOLDEN DRAGON REFRIGERATION Tech CO Ltd; Golden Dragon Precise Copper Tube Group Inc
Priority date: 2010-01-28
Filing date: 2010-01-28
Publication date: 2011-06-29
Anticipated expiration: 2020-01-28

Abstract

The utility model provides a parallel flow heat exchanger, comprising two or more groups of flat tubes, wherein widths of the flat tubes are successively increased from front to rear and the number of holes of the flat tubes is increased in order from front to rear. By enhancing the width and the number of holes of the flat tubes in the rear row, the parallel flow heat exchanger allows an increase in the heat exchange area and especially an increase in the heat exchange ability of the flat tubes in the rear row, making the heat exchange between the flat tubes in the front and rear rows more uniform and thereby achieving overall improved heat exchange performance.

Description

Parallel-flow heat exchanger

Technical field

The utility model relates to the heat exchanger of air condition field, particularly relates to a kind of parallel-flow heat exchanger.

Background technology

The general parallel-flow heat exchanger that adopts double or many rows of the heat exchanger of existing air conditioning for automobiles, family expenses and business air conditioner, be characterized in: structural parameters such as the width of front and rear row flat tube, wall thickness, hole count all are identical, so the heat exchange area of heat exchanger front and rear row flat tube is also identical; But because the face velocity of preceding rows of flat pipes is higher, the heat exchange degree is also than higher, air draft speed then relatively a little less than, the heat exchange degree also thereupon a little less than, therefore the heat exchange degree of heat exchanger is extremely inhomogeneous, back rows of flat pipes is more much smaller than preceding comb to the contribution of whole heat exchanger heat exchange, thereby has influenced the whole heat exchange property of heat exchanger.Though can this inhomogeneities be reduced by adjusting flow process, the raising of whole heat exchange property be still not obvious.

The utility model content

Technical problem to be solved in the utility model provides a kind of parallel-flow heat exchanger, and it is inhomogeneous to solve existing heat exchanger front and rear row flat tube heat exchange degree, the relatively poor problem of whole heat exchange property of heat exchanger.

In order to address the above problem, the utility model discloses a kind of parallel-flow heat exchanger, comprise the flat tube of two or more rows, the width of described flat tube increases from front to back successively, and the hole count of described flat tube increases from front to back successively.

Preferably, the smooth degree of aperture weakens from front to back successively in the described flat tube.

Preferably, the aperture of first rows of flat pipes is the smooth passage, and the aperture inwall of other flat tubes outside first rows of flat pipes is provided with the different internal tooth of tooth depth, and the tooth depth difference of described flat tube internal tooth increases from front to back successively.

Compared with prior art, the utlity model has following advantage:

By increasing the width and the hole count of back rows of flat pipes, perhaps reduce the smooth degree of back rows of flat pipes passage, thereby increase the heat exchange area of parallel-flow heat exchanger, particularly by strengthening the exchange capability of heat of back rows of flat pipes, make the heat exchange of front and rear row flat tube more even, and strengthen the whole heat exchange property of heat exchanger thus.

Description of drawings

Fig. 1-a is the structural representation of the utility model parallel-flow heat exchanger first embodiment;

Fig. 1-b is the flat tube part partial enlarged drawing of the utility model parallel-flow heat exchanger first embodiment;

Fig. 2 is the aperture part partial enlarged drawing of the flat tube of the utility model parallel-flow heat exchanger second embodiment.

The specific embodiment

For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.

One of core idea of the present utility model is, increase the width and the hole count of back rows of flat pipes, or the smooth degree (as internal tooth is set) of improvement back rows of flat pipes, to increase the heat exchange area of back rows of flat pipes, significantly strengthen the exchange capability of heat of back rows of flat pipes, make the heat exchange of front and rear row flat tube more even, and therefore strengthen the whole heat exchange property of heat exchanger.

First embodiment:

With reference to Fig. 1-a, show the structural representation of the utility model parallel-flow heat exchanger first embodiment, this parallel-flow heat exchanger embodiment is double flat tube configuration, wherein, the width of preceding rows of flat pipes 11 is narrower than the width of back rows of flat pipes 12; The quantity of the aperture 111 that is provided with in the preceding rows of flat pipes 11 is lacked than the quantity of the aperture 121 that is provided with in the rows of flat pipes 12 of back, and wherein, the quantity of the aperture 111 of rows of flat pipes 11 is 6 before each, and the quantity of the aperture 121 of rows of flat pipes 12 is 8 after each.

Fig. 1-b shows the flat tube part partial enlarged drawing of above-mentioned parallel-flow heat exchanger embodiment, more be shown clearly in the arrangement mode of heat exchanger front and rear row flat tube, and, the design feature that the width of preceding rows of flat pipes 11 lacks than the quantity of the aperture 121 that is provided with in the rows of flat pipes 12 of back than the quantity of the aperture 111 that is provided with in narrow, the preceding rows of flat pipes 11 of width of back rows of flat pipes 12.

Need to prove that the hole count setting of above-mentioned flat tube (be that front-seat hole count is 6, back round number is 8) is a preferred embodiment just, can also select other compound modes, is 8 as the hole count of preceding rows of flat pipes 11, and the hole count of back rows of flat pipes is 10 or the like; In addition,

aperture

111 and 121 shape also are not limited to the circle shown in Fig. 1-a and the 1-b, can also select other geometries such as ellipse, rectangle.

Second embodiment:

In the present embodiment, parallel-flow heat exchanger is double flat tube configuration, and the hole count that is provided with in the width of its front and rear row flat tube and the flat tube is identical, and the aperture inner chamber of preceding rows of flat pipes is the smooth passage, in the aperture inner chamber of back rows of flat pipes internal tooth is set.With reference to Fig. 2, show the aperture part partial enlarged drawing of the back rows of flat pipes of the utility model parallel-flow heat exchanger second embodiment, wherein, aperture 211 be shaped as rectangle, the cross sectional shape that is arranged on aperture 211 inner chambers internal tooth 212 all around is a triangle, and the tooth depth of internal tooth 212 is for also inequality.

Need to prove that the cross sectional shape of the internal tooth 212 of aperture 211 is not limited to triangle shown in Figure 2 in the flat tube, can also select rectangle, other cross sectional shapes such as trapezoidal; For internal tooth 212, also be not limited to shown in Figure 2 around aperture, internal tooth is set, only can also select two faces (as two faces up and down) or three faces (as about last three faces) be provided with; The shape of aperture 211 also is not limited to rectangle shown in Figure 2, can also select other shapes such as circle, ellipse.

In another preferred embodiment of the utility model embodiment, in the aperture inner chamber of preceding rows of flat pipes and back rows of flat pipes, internal tooth is set all, wherein, before in the rows of flat pipes tooth depth difference of internal tooth to be less than the tooth depth of internal tooth in the rows of flat pipes of back poor, as, the low tooth height of internal tooth is 2/3 of a high tooth height in the preceding rows of flat pipes aperture inner chamber, and the low tooth height of internal tooth is 1/2 of a high tooth height in the back rows of flat pipes aperture inner chamber.

In addition, according to the performance requirement of heat exchanger, can also carry out the improvement of other form to the front and rear row flat tube, as improving the smooth degree of front and rear row flat tube inner chamber, rows of flat pipes is more smooth than the inner chamber smooth degree of back rows of flat pipes before making.

The 3rd embodiment:

In the present embodiment, not only the width of flat tube and the hole count that comprises are improved, make that the width of back rows of flat pipes is wideer than the width of preceding rows of flat pipes, the aperture quantity that back rows of flat pipes comprised is more than the hole count of preceding rows of flat pipes, thereby increases the heat exchange area of back rows of flat pipes; Also the small structure with the back rows of flat pipes improves, Surface Machining at the aperture inner chamber forms internal tooth, with the further heat exchange area that increases the back rows of flat pipes, the back rows of flat pipes heat exchange degree that rows of flat pipes and wind speed are lower before making face velocity higher is more even, thereby improves the whole heat exchange property of heat exchanger.

Need to prove,, front and back two rows of flat pipes can also be changed into the form of three rows or the above flat tube of three rows for above-mentioned three embodiment.For the first embodiment scheme, the width of flat tube increases from front to back successively, and the hole count of flat tube increases from front to back successively; For the second embodiment scheme, the smooth degree of aperture weakens from front to back successively in the flat tube; For the 3rd embodiment scheme, the width of flat tube increases from front to back successively, and the hole count of flat tube increases from front to back successively, and the smooth degree of aperture weakens from front to back successively in the flat tube.

Each embodiment in this specification all adopts the mode of going forward one by one to describe, and what each embodiment stressed all is and the difference of other embodiment that identical similar part is mutually referring to getting final product between each embodiment.

More than a kind of parallel-flow heat exchanger provided by the utility model is described in detail, used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.

Claims

1. parallel-flow heat exchanger comprises the flat tube of two or more rows it is characterized in that the width of described flat tube increases from front to back successively that the hole count of described flat tube increases from front to back successively.

2. parallel-flow heat exchanger as claimed in claim 1 is characterized in that the smooth degree of aperture weakens from front to back successively in the described flat tube.

3. parallel-flow heat exchanger as claimed in claim 2, it is characterized in that, the aperture of first rows of flat pipes is the smooth passage, and the aperture inwall of other flat tubes outside first rows of flat pipes is provided with the different internal tooth of tooth depth, and the tooth depth difference of described flat tube internal tooth increases from front to back successively.