CN102230695B - Parallel flow heat exchanger - Google Patents
Parallel flow heat exchanger Download PDFInfo
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- CN102230695B CN102230695B CN 201110175978 CN201110175978A CN102230695B CN 102230695 B CN102230695 B CN 102230695B CN 201110175978 CN201110175978 CN 201110175978 CN 201110175978 A CN201110175978 A CN 201110175978A CN 102230695 B CN102230695 B CN 102230695B
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Abstract
The invention discloses a parallel flow heat exchanger comprising an upper collecting pipe, a lower collecting pipe, a plurality of flat pipes and fins, wherein the plurality of flat pipes are arranged between the upper collecting pipe and the lower collecting pipe, and the fins are arranged between the adjacent flat pipes. The parallel flow heat exchanger is characterized in that a flow control plate adhered with a communication hole is fixed in the lower collecting pipe; the lower collecting pipe is divided into a first cavity and a second cavity by the flow control plate; the wall surface of the first cavity is provided with a coolant pipe interface; the coolant in the first cavity is communicated to the second cavity via communication holes on two ends of the flow control plate; and the second cavity is communicated with the flat pipes. Under the condition that coolant flow is sufficient, the coolant flow can not be concentrated on two sides but is hedged to the middle from two ends in the second cavity of the collecting pipe, so that a larger zone has even pressure, and the coolant evenly flows into the flat pipe of the heat exchanger; and under the variable-frequency working condition, coolant in the second cavity simultaneously flows to the middle from two directions when the flow is decreased, and the coolant in the pipe evenly flows into the flat pipe of the heat exchanger so as to obtain better heat exchange effect.
Description
Technical field
The present invention relates to heat exchanger, especially a kind of parallel-flow heat exchanger that can improve the heat-exchange working medium flow uniformity.
Background technology
Parallel-flow heat exchanger is used to increasing technical field as a kind of efficient heat exchanger.But, after common parallel-flow heat exchanger exists heat-exchange working medium to enter into header from tube connector, the refrigerant inhomogeneous situation that flows, when cold medium flux was larger, refrigerant can flow to the far-end of header, thereby produced refrigerant situation pockety in each flat tube.
Particularly when parallel-flow heat exchanger is used for convertible frequency air-conditioner, air conditioner refrigerant flow changes, and the parallel-flow heat exchanger 1 of prior art as shown in Figure 1 is provided with flat tube 4 between upper header 2 and the lower header 3, be provided with fin 5 between adjacent two flat tubes, refrigerant is flowed into by lower header 3 one ends.When cold medium flux increased, refrigerant can flow to the far-end of lower header 3, caused flat tube 4 cold medium fluxes of far-end large, and the heat exchanger cold medium flux is inhomogeneous; When cold medium flux diminished, refrigerant just can not flow to far-end, perhaps only had to flow on a small quantity far-end, and flowed out from flat tube 4 nearby, had caused the mobile inhomogeneous of heat exchanger.When other structures of heat exchanger are arranged to according to flow bigger than normal or flow less than normal operation, the effect that always has a kind of operating mode is very undesirable, have no idea to carry out the marketization, so how could make parallel-flow heat exchanger that good uniformity is arranged under different operating modes, be the technical problem that needs to be resolved hurrily thereby improve heat transfer effect.
Summary of the invention
The present invention is intended to solve existent defect in the above-mentioned prior art, and the parallel-flow heat exchanger of a kind of cold medium flux uniformity height, good effect of heat exchange is provided.
The technical scheme that realizes the object of the invention is, a kind of parallel-flow heat exchanger, comprise header, lower header, be arranged on several flat tubes between the described header, be arranged on the fin between the adjacent flat tube, it is characterized in that, be fixed with the flow control plate with intercommunicating pore in the lower header, this intercommunicating pore is arranged on the two ends of flow control plate, mid portion does not arrange intercommunicating pore, described flow control plate is divided into the first cavity and the second cavity to lower header, be provided with the refrigerant pipe interface on the wall of the first cavity, refrigerant in the first cavity is communicated to the second cavity by the intercommunicating pore on the described flow control plate two ends, and the second cavity is communicated with flat tube.
Intercommunicating pore on the above-mentioned flow control plate two ends respectively is provided with 1 to 3.
Above-mentioned flow control plate intercommunicating pore is concrete to arrange the end cap that is from lower header in the scope 1/4 length of the lower header of homonymy.
Intercommunicating pore on the above-mentioned flow control plate two ends is symmetrical arranged.
For making things convenient for the sealing of flow control plate on the lower header inwall to fix, there is convex arc the both sides of described flow control plate, and the shape of the inwall of the shape of described convex arc and header fixed position matches.
The fixed form of flow control plate on the lower header inwall adopts integral braze-welded mode, at flow control plate and header contact position brazing material arranged.
Flow control plate and lower header both ends of the surface are fixed and are sealed.
Be provided with the refrigerant pipe interface at the first cavity, described refrigerant pipe interface is positioned at the middle part of lower header, and is identical with the distance of the intercommunicating pore at flow control plate two ends.
The invention has the beneficial effects as follows, owing to utilize the flow control plate that lower header is divided into two cavitys, and set up intercommunicating pore separately at flow control plate two ends, therefore, in the situation of cold medium flux abundance, cold medium flux is not concentrated in both sides, but refrigerant enters the second cavity by the intercommunicating pore of the first cavity through flow control plate two ends, thereby in header the second cavity, liquidated to the centre by two ends, after middle pressure increases, can make larger areal pressure even, thereby make more equably inflow heat exchanger flat tube of the interior refrigerant of lower header; Under the frequency conversion operating mode, when flow reduces, because refrigerant also is simultaneously to intermediate flow from both direction in the second cavity, so the flow near both sides can not diminish, and the flow at middle place liquidates by both sides, also can make more equably inflow heat exchanger flat tube of the interior refrigerant of pipe, thereby obtain good heat transfer effect.
Description of drawings
Fig. 1 is the parallel-flow heat exchanger stereogram that prior art adopts;
Fig. 2 is the front view of the embodiment of the invention one;
Fig. 3 is the side view in the A-A cross section among Fig. 2;
Fig. 4 is the cutaway view Amplified image at B place among Fig. 2;
Fig. 5 is the cutaway view Amplified image at C place among Fig. 2;
Fig. 6 is the flow control plate front view of the embodiment of the invention one;
Fig. 7 is the stereogram that the flow control plate of the embodiment of the invention one is fixed on the lower header inwall;
Fig. 8 is the flow control plate stereogram of the embodiment of the invention two.
Wherein 1 is heat exchanger; 2 is upper header; 3 is lower header; 4 is flat tube; 5 is fin; 6 is the flow control plate; 7 is the flow control plate hole; 8 is flow control plate convex arc section; 9 is the header internal face; 10 is refrigerant introduction pipe; 11 is the refrigerant introduction pipe Connection Block; 12 is the first cavity; 13 is the second cavity; 14 is end cap.
The specific embodiment
Embodiment one:
Present embodiment such as Fig. 2 are to shown in Figure 7, parallel-flow heat exchanger 1 comprises header 2, lower header 3, be arranged on a plurality of flat tubes 4 between two headers, and be arranged on fin 5 between the adjacent flat tube 4, in lower header 3, be fixed with flow control plate 6, described flow control plate 6 is divided into two cavitys to lower header 3, be provided with refrigerant introduction pipe 10 on the wall of the first cavity 12, the refrigerant that enters the first cavity 12 from refrigerant introduction pipe 10 is communicated to the second cavity 13, the second cavitys 13 by the flow control plate hole 7 on flow control plate 6 two ends and is communicated with flat tube 4.
When the present invention works, when parallel-flow heat exchanger operates in standard condition lower time, after the linked hole 7 at refrigerant flow control plate 6 two ends from lower header 3 entered the second cavity 13, the refrigerant of the left and right sides can compile to the centre, produce collision, and improved cold medium flux and the pressure of mid portion.Because the static pressure that collide to produce can make in the larger zone of lower header 3 pars intermedias larger and uniform pressure area is arranged, and the distribution that the refrigerant of lower header 3 is flowed is relatively even.More than be the operating mode in the situation of cold medium flux abundance, namely standard condition perhaps operates in greater than the refrigerant mobility status under the standard condition.
When adopting operation at part load, cold medium flux can obviously reduce, in common parallel-flow heat exchanger, tend to occur the situation of far-end cold medium flux deficiency, and the technical scheme of employing present embodiment, after the intercommunicating pore 7 at refrigerant flow control plate 6 two ends from lower header 3 enters the second cavity 13, owing to there are two refrigerant entrances at two ends, be equivalent to only need to flow through half of lower header 3 length of every part refrigerant, so refrigerant can collide at lower header 3 middle parts, and the cold medium flux of raising mid portion.Such method to set up can make the flow through distance of lower header 3 of refrigerant reduce, thereby at the mid portion of lower header 3 is arranged compiling of refrigerant, thereby improves the cold medium flux of mid portion, thereby improves the uniformity that the heat exchanger refrigerant flows.Namely under standard condition and during sub-load, can produce preferably heat transfer effect.
The quantity of every end intercommunicating pore 7 can be more than 1 on the flow control plate 6, accelerates or area when the intercommunicating pore 7 of an end as good for take 1 to 3, and then the intercommunicating pore 7 of lower header 3 other ends is also accelerated or area accordingly.The identical form of intercommunicating pore 7 areas at preferred two ends, the more preferably setting of the intercommunicating pore 7 form symmetries at two ends.
For the effect that guarantees that refrigerant collides, and the intercommunicating pore 7 the right and left refrigerants that guarantee two ends on the flow control plate 6 coolant quantity that flows to flat tube 4 and collision place coolant quantity is suitable, flow control plate intercommunicating pore 7 is in the left and right sides of flow control plate 6, concrete position is that end cap 14 from lower header 3 is to the position 1/4 length of the lower header of homonymy, when flow control plate intercommunicating pore 7 is positioned at more close end cap 14 place, may be owing to distant and at cold medium flux hour, it is not enough that the refrigerant at center collides; When flow control plate hole 7 was positioned at more close 1/4 place, near the flow of the flat tube 4 the end cap 14 will be less than normal.Need to be according to concrete lower header length and the situation of cold medium flux, the concrete position of determining the actual intercommunicating pore 7 that adopts.
It is to realize by integral braze-welded mode that flow control plate 6 is fixed on lower header internal face 9, in lower header internal face 9 and flow control plate 6 contact positions brazing material is arranged, and preferred mode is laid with brazing material at flow control plate 6.In order to ensure enough bonding areas, in Fig. 7, be provided with the flow control plate convex arc section 8 corresponding with lower header internal face 9 shapes in the both sides of flow control plate 6, the shape of the inwall of the outer rim shape of convex arc section 8 and lower header 3 fixed positions matches, and increase both contact area, and increase simultaneously both bonding areas, improve the sealing of intensity and solder side, so that refrigerant can not flow out from solder skip, improve the uniformity of product quality.
The interface of refrigerant introduction pipe 10 and the first cavity 12 is positioned at the middle part of lower header 3, and by 11 connections of refrigerant introduction pipe Connection Block, identical with the distance of the intercommunicating pore 7 at flow control plate 6 two ends, can guarantee that like this refrigerant pressure and the flow of intercommunicating pore 7 at two ends is suitable, it is more even that refrigerant is liquidated.
Embodiment two:
As shown in Figure 8, present embodiment and embodiment one compare, and main difference is: in the both sides of flow control plate 6 two flow control plate holes 7 are arranged respectively, increased like this circulation area of flow control plate hole 7, reduced the flow resistance of refrigerant.And the combination in the hole by large small-bore can be regulated the area of circulation more easily, better organizes liquid form.
Claims (8)
1. parallel-flow heat exchanger, comprise header (2), lower header (3), be arranged on several flat tubes (4) between the described header, be arranged on the fin (5) between the adjacent flat tube (4), it is characterized in that, be fixed with the flow control plate (6) with intercommunicating pore (7) in the lower header (3), this intercommunicating pore (7) is arranged on the two ends of flow control plate (6), mid portion does not arrange intercommunicating pore (7), described flow control plate (6) is divided into the first cavity (12) and the second cavity (13) to lower header (3), be provided with the refrigerant pipe interface on the wall of the first cavity (12), refrigerant in the first cavity (12) is communicated to the second cavity (13) by the intercommunicating pore (7) on described flow control plate (6) two ends, and the second cavity (13) is communicated with flat tube (4).
2. parallel-flow heat exchanger according to claim 1 is characterized in that, the intercommunicating pore (7) on described flow control plate (6) two ends respectively is provided with 1 to 3.
3. parallel-flow heat exchanger according to claim 2 is characterized in that, described flow control plate intercommunicating pore (7) specifically is arranged on end cap (14) from lower header (3) in the scope 1/4 length of the lower header (3) of homonymy.
4. parallel-flow heat exchanger according to claim 3 is characterized in that, the intercommunicating pore (7) on described flow control plate (6) two ends is symmetrical arranged.
5. parallel-flow heat exchanger according to claim 1 is characterized in that, there is convex arc (8) both sides of described flow control plate (6), and the shape of the inwall (9) of the shape of described convex arc (8) and header fixed position matches.
6. parallel-flow heat exchanger according to claim 5 is characterized in that, the fixed form of described flow control plate (6) on lower header inwall (9) adopts integral braze-welded mode, in flow control plate (6) and header inwall (9) contact position brazing material is arranged.
7. parallel-flow heat exchanger according to claim 6 is characterized in that, described flow control plate (6) is fixed with lower header (3) both ends of the surface and sealed.
8. parallel-flow heat exchanger according to claim 1 is characterized in that, is provided with the refrigerant pipe interface at described the first cavity (12), and described refrigerant pipe interface is positioned at the middle part of lower header (3), and is identical with the distance of the intercommunicating pore (7) at flow control plate (6) two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110175978 CN102230695B (en) | 2011-06-28 | 2011-06-28 | Parallel flow heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110175978 CN102230695B (en) | 2011-06-28 | 2011-06-28 | Parallel flow heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN102230695A CN102230695A (en) | 2011-11-02 |
| CN102230695B true CN102230695B (en) | 2013-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110175978 Active CN102230695B (en) | 2011-06-28 | 2011-06-28 | Parallel flow heat exchanger |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106482494A (en) * | 2016-11-15 | 2017-03-08 | 福建省古田君益佳农业开发有限公司 | A kind of drying unit |
| CN109193070A (en) * | 2018-09-05 | 2019-01-11 | 江苏奥吉瑞斯新能源有限公司 | A kind of refrigerant coolant liquid mixed type power battery heat sink |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04108191U (en) * | 1991-03-01 | 1992-09-18 | 東洋ラジエーター株式会社 | Heat exchanger inlet header |
| CN1991289A (en) * | 2005-12-26 | 2007-07-04 | 株式会社电装 | Heat exchanger |
| CN101644512A (en) * | 2008-08-05 | 2010-02-10 | 昭和电工株式会社 | Heat exchanger |
| CN201876184U (en) * | 2010-09-01 | 2011-06-22 | 珠海格力电器股份有限公司 | Current collecting pipe and heat exchanger with same |
-
2011
- 2011-06-28 CN CN 201110175978 patent/CN102230695B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04108191U (en) * | 1991-03-01 | 1992-09-18 | 東洋ラジエーター株式会社 | Heat exchanger inlet header |
| CN1991289A (en) * | 2005-12-26 | 2007-07-04 | 株式会社电装 | Heat exchanger |
| CN101644512A (en) * | 2008-08-05 | 2010-02-10 | 昭和电工株式会社 | Heat exchanger |
| CN201876184U (en) * | 2010-09-01 | 2011-06-22 | 珠海格力电器股份有限公司 | Current collecting pipe and heat exchanger with same |
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| CN102230695A (en) | 2011-11-02 |
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Owner name: MIDEA GROUP CO., LTD. Free format text: FORMER OWNER: MEIDI ELECTRIC APPLIANCES CO., LTD., GUANGDONG Effective date: 20131204 |
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Effective date of registration: 20131204 Address after: 528311 Guangdong, Foshan, Beijiao, the United States, the United States and the United States on the avenue of the United States, the headquarters of the United States building B floor, District, 26-28 Patentee after: Midea Group Co., Ltd. Address before: 528311 Beijiao, Foshan, Shunde District, the town of Guangdong, the United States Avenue, No. 6 Patentee before: Meidi Electric Appliances Co., Ltd., Guangdong |