CN102564205A - Flow distributing structure of heat exchanger with micro-channels - Google Patents
Flow distributing structure of heat exchanger with micro-channels Download PDFInfo
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- CN102564205A CN102564205A CN2012100326986A CN201210032698A CN102564205A CN 102564205 A CN102564205 A CN 102564205A CN 2012100326986 A CN2012100326986 A CN 2012100326986A CN 201210032698 A CN201210032698 A CN 201210032698A CN 102564205 A CN102564205 A CN 102564205A
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Abstract
The invention discloses a flow distributing structure of a heat exchanger with micro-channels. The flow distributing structure comprises a fluid inflow portion (1), a fluid outflow portion (3) and the heat exchange micro-channels (2), the heat exchange micro-channels (2) are arranged between the fluid inflow portion (1) and the fluid outflow portion (3), flow distributing structure bodies are disposed among the fluid inflow portion (1) and the heat exchange micro-channels (2) and/or among the heat exchange micro-channels (2) and the fluid outflow portion (3), lead a stream of fluid to be divided into two streams from the middle of the fluid, and then divide the two streams of fluid into four streams of fluid after the fluid flows by a certain distance, and accordingly a required amount of fluid channels are sequentially divided. The flow distributing structures solve the problem that local pressure loss of flowing of fluid of an existing flow distributing structure is high, and the flow distributing structure is particularly applicable to heat exchangers with micro-channels.
Description
Technical field
The invention belongs to fluid dividing technology field, particularly a kind of fluid is assigned to the flow dividing structure of hundreds of or thousands of minim channels by big cavity.
Background technology
In the present field of heat exchangers, micro-channel heat exchanger leads the new direction of current heat exchanger research and development because volume is little, in light weight, and compact conformation is a kind of new type heat exchanger that begins practicability.The existing micro-channel heat exchanger that is used for heat pump nearly all is to add that with the aluminum flat tube section bar import and export of refrigeration working medium and working fluid realize, only limits to the branch type heat exchanger that the heat exchange between refrigeration working medium and the air is used.The heat exchanger of this form, refrigeration working medium is got into by collector (many barrel structures), is assigned in every layer of aluminium flat conduit; In flat tube, flow; The individual layer aluminium flat conduit receives the aluminium section bar process technology limit, and individual layer port number maximum also can only accomplish can not form the three-dimensional hollow structure that does not have thermal contact resistance about dozens of.
For solving the problems of the technologies described above, a kind of compact microchannel heat exchanger is disclosed among the Chinese patent document CN101509736A, comprise housing, be provided with the import and export and the microchannel of high temperature fluid and cryogen on the housing respectively.The microchannel is by high temperature fluid passage, and the interlayer between cry-fluid passage and high temperature fluid passage and the cry-fluid passage is combined into an overall structure with the method for solid atom diffusion.But because the pore size of microchannel reaches micron order, fluid is dispensed to hundreds of minim channels (form of advancing side by side) simultaneously by the big cavity in porch, and local pressure loss is bigger, directly influences the power that flow path system consumes.
Summary of the invention
For this reason, technical problem to be solved by this invention is that the fluid local pressure loss of existing micro-channel heat exchanger is bigger, and then a kind of flow dividing structure that reduces the micro-channel heat exchanger of fluid local pressure loss is provided.
For solving the problems of the technologies described above, the present invention discloses a kind of flow dividing structure of micro-channel heat exchanger, and it comprises that fluid inflow part, fluid flow out part, and is arranged at the heat exchange microchannel between fluid inflow part and the fluid outflow part; Between between said fluid inflow part and the said heat exchange microchannel and/or said heat exchange microchannel and said fluid outflow part, be provided with flow dividing structure; Said flow dividing structure make a fluid streams therefrom between the position be divided into two strands; After keeping at a certain distance away two stocks are become four strands, be divided into the fluid passage quantity of needs successively.
Said heat exchange microchannel is formed by the heat exchanger plates of stacked setting, forms a plurality of convexities that laterally arrange with fluid flow direction on the plate face of said heat exchanger plates; Formed said microchannel between adjacent protrusion and the adjacent heat exchanger plates plate face; The midway of said plate face is that the one-level shunting is protruding; Its length is greater than the projection length at two ends; Fluid is divided into two strands through the one-level in said centre position shunting convexity, and said one-level is shunted protruding both sides and kept at a certain distance away that to form the secondary shunting respectively protruding, and the protruding length of said secondary shunting is greater than the projection length at its two ends; Fluid is divided into four strands through said secondary shunting convexity; Three grades of shunting convexities of two sides reshaping that the secondary shunting is protruding, a plurality of shuntings of moulding are protruding successively, and the most said fluid is divided into the fluid passage quantity that needs.
It is protruding to form said one-level shunting on the said heat exchanger plates plate face successively, and said secondary shunting is protruding, and said three grades of shuntings are protruding, and fluid is divided into stereotyped writing.
The end of said convexity is blunt nosed shape.
The end of said convexity is streamlined, pointed shape, circle or oval wherein a kind of.
The end of said convexity is blunt nosed angular shape, and the scope of the angle [alpha] of said blunt nosed wedge angle is 0 °＜α＜90 °.
The angle [alpha] of said blunt nosed wedge angle is 55 °～65 °.
The end of adjacent two said convexities is perpendicular to the hydraulic diameter D apart from l and passage on the fluid flow direction
eRelation be l>=6D
e
Said heat exchanger plates is through the mode machine-shaping of photoetch.
Method through the solid atom diffusion between the adjacent heat exchanger plates is combined into integral body.
Technique scheme of the present invention is compared prior art and is had the following advantages:
Microchannel of the present invention flow dividing structure is that the Parabolic flowing velocity distribution in the major path is divided into countless little parabolic types in limited distance; Step by step that the centre is the higher speed of this flow dividing structure is divided to both sides, and then reaches speed trend homogeneous in the porch, microchannel.
Further; The structure that realizes the protruding end of shunting is blunt nosed shape; The setting of this blunt nosed shape is easy to the inflow of fluid, and the segregation phenomenon that has caused owing to sharp-pointed corner angle when having avoided microchannel entrance and exit a plurality of fluids to advance side by side reduces the pressure loss.
Description of drawings
For content of the present invention is more clearly understood, below according to a particular embodiment of the invention and combine accompanying drawing, the present invention is done further detailed explanation, wherein
Fig. 1 is the sketch map of the flow dividing structure of micro-channel heat exchanger;
Fig. 2 is the local amplification view of heat exchanger microchannel entrance;
Fig. 3 is the stereogram of heat exchanger plates;
Fig. 4 is the entrance and exit pressure loss contrast of different structure form.
Reference numeral is expressed as among the figure:
The protruding 221-one-level of 1-fluid inflow part 2-heat exchange microchannel 3-fluid outflow part 21-heat exchanger plates 22-is shunted protruding 222-secondary and is shunted three grades of shunting convexities of protruding 223-.
The specific embodiment
Below will combine accompanying drawing, and use following examples that the present invention is further set forth.
Fig. 1 is the flow dividing structure of a kind of micro-channel heat exchanger of the present invention, and it comprises that fluid flows into part 1, fluid flows out part 3, and is arranged at the heat exchange microchannel 2 between fluid inflow part 1 and the fluid outflow part 3; Between between said fluid inflow part 1 and the said heat exchange microchannel 2 and said heat exchange microchannel 2 and said fluid outflow part 3, a kind of fluid streams that makes is set and is divided into two strands in the middle part; After keeping at a certain distance away two stocks are become four strands, be divided into the flow dividing structure of the fluid passage quantity of needs successively.
Said heat exchange microchannel 2 is formed by the heat exchanger plates 21 of mutual stacked setting, form on the plate face of said heat exchanger plates 2 with fluid flow direction laterally arrange a plurality of protruding 22; Formed said microchannel between adjacent protrusion 22 and the adjacent heat exchanger plates 21 plate faces.
As shown in Figure 3; The length of the one-level shunting protruding 221 of the midway of said plate face is greater than convexity 22 length at two ends; Fluid is divided into two strands through the one-level in said centre position shunting protruding 221, said one-level shunt protruding 221 both sides respectively moulding secondary shunting protruding 222 two fluid streams are divided into four strands, three grades of shuntings of the two sides reshaping of secondary shunting protruding 222 protruding 223; Three grades of protruding two sides moulding level Four shuntings of shunting are protruding, and said fluid is divided into 16 fluid streams passages.
Said protruding 22 end is preferably blunt nosed shape; Preferred, these convexity 22 ends are wherein a kind of of streamlined D, pointed shape A, circular B or oval C.As shown in Figure 2.The blunt nosed setting in this end is easy to the inflow of fluid, when having avoided advancing side by side (like the flush shape E among Fig. 2), because the segregation phenomenon that sharp-pointed corner angle cause reduces the pressure loss.
In the present embodiment, said protruding 22 end is blunt nosed angular shape, and the scope of the angle [alpha] of said blunt nosed wedge angle is 0 °＜α＜90 °.It is along with the increase of angle [alpha], and inlet pressure loss and outlet pressure loss are on a declining curve.Preferably, the angle [alpha] of said blunt nosed wedge angle is 55 °～65 °.
Nuclear stream (core flow) effect when dwindling anxious expansion according to the fluid inflow and outflow is anxious, adjacent two said ends of protruding 22 are perpendicular to the hydraulic diameter D apart from l and passage on the fluid flow direction
eRelation is l>=6D
e(said hydraulic diameter D
e=4* overflow section amasss/wetting girth).Can in relatively shorter length, make the fluid velocity trend evenly like this.
Because the size of microchannel reaches micron order, said heat exchanger plates is through the mode machine-shaping of photoetch.Method through the solid atom diffusion between the adjacent heat exchanger plates 4 is combined into integral body.
For different blunt nosed shapes, its pressure loss is different, and the applicant has carried out numerical experiment for the heat exchanger of the blunt nosed form of difference, and wherein, the shunting convex shape is as shown in table 1, and the result is as shown in Figure 4 for its pressure loss.Wherein:
1) condition is that the entrance total length is consistent, and effective channel length is consistent.
2) Δ P
InBe the inducer pressure loss, Δ P
OutBe the outlet section pressure loss.
The design parameter of the fluid inflow and outflow of the middle expression of Fig. 4 is as shown in table 1.
Table 1 splitter section design parameter
Can know that according to Fig. 4 fluid is maximum in the pressure loss at entrance and exit place when No.2 is got in the design of splitter section; Under the same nose shape condition increase of distributary division length then the pressure loss reduce.Under the condition of certain splitter section length, (entrance and exit pressure loss No.6) is basic identical for No.4, No.5 for the nose shape condition shown in the table 1; Can select suitable design shape and parameter according to manufacturing cost.
Obviously, the foregoing description only be for explanation clearly done for example, and be not qualification to embodiment.For the those of ordinary skill in affiliated field, on the basis of above-mentioned explanation, can also make other multi-form variation or change.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. the flow dividing structure of a micro-channel heat exchanger, it comprises,
Fluid flows into part (1), fluid flows out part (3), and is arranged at fluid and flows into part (1) and flow out the partly heat exchange microchannel (2) between (3) with fluid; It is characterized in that:
Between between said fluid inflow part (1) and the said heat exchange microchannel (2) and/or said heat exchange microchannel (2) and said fluid outflow part (3), be provided with flow dividing structure; Said flow dividing structure make a fluid streams therefrom between the position be divided into two strands; After keeping at a certain distance away two stocks are become four strands, be divided into the fluid passage quantity of needs successively.
2. the flow dividing structure of micro-channel heat exchanger according to claim 1 is characterized in that:
Said heat exchange microchannel (2) is formed by the heat exchanger plates (21) of stacked setting, forms a plurality of convexities (22) that laterally arrange with fluid flow direction on the plate face of said heat exchanger plates (21); Formed said microchannel between adjacent protrusion (22) and adjacent heat exchanger plates (21) the plate face;
The midway of said plate face is one-level shunting protruding (221); Its length is greater than the projection length at two ends; Fluid is divided into two strands through the one-level shunting protruding (221) in said centre position, and protruding (221) both sides of said one-level shunting keep at a certain distance away and form secondary shunting protruding (222) respectively, and the length of said secondary shunting protruding (222) is greater than the projection length at its two ends; Fluid is divided into four strands through said secondary shunting protruding (222); Three grades of shuntings of the two sides reshaping of secondary shunting protruding (222) protruding (223), a plurality of shuntings of moulding are protruding successively, and the most said fluid is divided into the fluid passage quantity that needs.
3. the flow dividing structure of micro-channel heat exchanger according to claim 2 is characterized in that:
Form said one-level shunting protruding (221) on the said heat exchanger plates plate face successively, said secondary shunting protruding (222), and said three grades of shuntings protruding (223) are divided into stereotyped writing with fluid.
4. according to the flow dividing structure of the arbitrary described micro-channel heat exchanger of claim 1-3, it is characterized in that:
The end of said convexity (22) is blunt nosed shape.
5. the flow dividing structure of micro-channel heat exchanger according to claim 4 is characterized in that:
The end of said convexity (22) is streamlined, pointed shape, circle or oval wherein a kind of.
6. the flow dividing structure of micro-channel heat exchanger according to claim 5 is characterized in that:
The end of said convexity (22) is blunt nosed angular shape, and the scope of the angle [alpha] of said blunt nosed wedge angle is 0 °＜α＜90 °.
7. the flow dividing structure of micro-channel heat exchanger according to claim 6 is characterized in that:
The angle [alpha] of said blunt nosed wedge angle is 55 °～65 °.
8. according to the flow dividing structure of the arbitrary described micro-channel heat exchanger of claim 1-7, it is characterized in that:
The end of adjacent two said convexities (22) is perpendicular to the hydraulic diameter D apart from l and passage on the fluid flow direction
eRelation be l>=6D
e
9. according to the flow dividing structure of the arbitrary described micro-channel heat exchanger of claim 1-8, it is characterized in that:
Said heat exchanger plates (21) is through the mode machine-shaping of photoetch.
10. according to the flow dividing structure of the arbitrary described micro-channel heat exchanger of claim 1-9, it is characterized in that:
Method through the solid atom diffusion between the adjacent heat exchanger plates (21) is combined into integral body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210032698.6A CN102564205B (en) | 2012-01-16 | 2012-02-14 | Flow distributing structure of heat exchanger with micro-channels |
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| CN201210012507 | 2012-01-16 | ||
| CN201210012507.X | 2012-01-16 | ||
| CN201210032698.6A CN102564205B (en) | 2012-01-16 | 2012-02-14 | Flow distributing structure of heat exchanger with micro-channels |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043144A (en) * | 2015-06-12 | 2015-11-11 | 西安交通大学 | Double-side etching high-temperature and high-pressure printed circuit board heat exchanger |
| CN109000488A (en) * | 2017-09-14 | 2018-12-14 | 华北电力大学 | A kind of dot matrix heat exchanger |
| WO2024018977A1 (en) * | 2022-07-19 | 2024-01-25 | ダイキン工業株式会社 | Heat exchanger and refrigerant cycle device |
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| DE3310236A1 (en) * | 1983-03-22 | 1984-09-27 | Autokühler-Gesellschaft mbH, 3520 Hofgeismar | Refrigerant distributor for the evaporator of a refrigerator or heat pump |
| US4585057A (en) * | 1982-09-30 | 1986-04-29 | Krw Energy Systems Inc. | Cooled tubesheet inlet for abrasive fluid heat exchanger |
| US4785877A (en) * | 1986-05-16 | 1988-11-22 | Santa Fe Braun Inc. | Flow streamlining device for transfer line heat exchanges |
| JPH09166368A (en) * | 1995-12-14 | 1997-06-24 | Sanden Corp | Heat exchanger |
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| US3456719A (en) * | 1967-10-03 | 1969-07-22 | Lummus Co | Transfer line heat exchanger |
| US4585057A (en) * | 1982-09-30 | 1986-04-29 | Krw Energy Systems Inc. | Cooled tubesheet inlet for abrasive fluid heat exchanger |
| DE3310236A1 (en) * | 1983-03-22 | 1984-09-27 | Autokühler-Gesellschaft mbH, 3520 Hofgeismar | Refrigerant distributor for the evaporator of a refrigerator or heat pump |
| US4785877A (en) * | 1986-05-16 | 1988-11-22 | Santa Fe Braun Inc. | Flow streamlining device for transfer line heat exchanges |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105043144A (en) * | 2015-06-12 | 2015-11-11 | 西安交通大学 | Double-side etching high-temperature and high-pressure printed circuit board heat exchanger |
| CN109000488A (en) * | 2017-09-14 | 2018-12-14 | 华北电力大学 | A kind of dot matrix heat exchanger |
| CN109000488B (en) * | 2017-09-14 | 2024-05-28 | 华北电力大学 | Dot matrix heat exchanger |
| WO2024018977A1 (en) * | 2022-07-19 | 2024-01-25 | ダイキン工業株式会社 | Heat exchanger and refrigerant cycle device |
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| CN102564205B (en) | 2014-06-11 |
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Owner name: HANGZHOU SHENSHI ENERGY SAVING TECHNOLOGY CO., LTD Free format text: FORMER NAME: HANGZHOU SHENSHI HEAT EXCHANGER CO., LTD. |
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Address after: Jiande hangtou Town Industrial Zone, Hangzhou city 311612 large mouth block in Zhejiang Province Patentee after: HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY CO., LTD. Address before: Jiande City, Zhejiang province 311612 large hangtou Town Industrial Park Patentee before: Hangzhou Shenshi Heat Exchanger Co., Ltd. |
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Effective date of registration: 20170615 Address after: 5, vaga building 337, Singapore Science Park, 6 Avenue, Baiyang street, Xiasha Economic Development Zone, Zhejiang, Hangzhou 310018, China Patentee after: Hangzhou micro control energy saving Technology Co., Ltd. Address before: Jiande hangtou Town Industrial Zone, Hangzhou city 311612 large mouth block in Zhejiang Province Patentee before: HANGZHOU SHENSHI ENERGY CONSERVATION TECHNOLOGY CO., LTD. |
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