CN102278909A - Microchannel heat exchanger and manufacturing method thereof - Google Patents
Microchannel heat exchanger and manufacturing method thereof Download PDFInfo
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- CN102278909A CN102278909A CN 201110132839 CN201110132839A CN102278909A CN 102278909 A CN102278909 A CN 102278909A CN 201110132839 CN201110132839 CN 201110132839 CN 201110132839 A CN201110132839 A CN 201110132839A CN 102278909 A CN102278909 A CN 102278909A
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Abstract
The invention provides a microchannel heat exchanger and a manufacturing method thereof. The microchannel heat exchanger comprises a plurality of flat pipes which are communicated with a collecting pipe. A middle channel is arranged in each flat pipe. Fins are disposed among the flat pipes. A distribution pipe is arranged in the collecting pipe. The side wall of the distribution pipe is provided with distribution holes which are communicated with an inner cavity of the collecting pipe. A first end of the collecting pipe is equipped with a first end plate, which has a recess. A first port of the distribution pipe is inserted into the recess, which is welded, fixed and sealed with the outer wall of the first port. The shape of the inner wall of the recess is matched with that of the outer wall of the first port of the distribution pipe. The cross section of the recess has a conical shape or a truncated cone shape. The angle between the side edge of the recess and the top of the recess is Alpha, which ranges from 30 DEG to 80 DEG. Or, the cross section of the recess is in the shape of a cylinder. The microchannel heat exchanger of the invention has the characteristics of simple and reasonable structure, flexible operation, low manufacture cost, uniform flow distribution and good stability and reliability.
Description
Technical field
The present invention relates to a kind of heat exchanger, particularly a kind of micro-channel heat exchanger and preparation method thereof.
Background technology
Micro-channel heat exchanger more and more is subjected to paying close attention to widely and using as a kind of new type heat exchanger.
In order to improve the even flowability of the heat-exchange working medium in the micro-channel heat exchanger, often adopt the structure of in the header of micro-channel heat exchanger, inserting distributing pipe, shunt heat-exchange working medium by the hole on the distributing pipe, improve the uniformity that heat-exchange working medium enters the flat tube in the micro-channel heat exchanger.
Referring to Fig. 1, existing micro-channel heat exchanger comprises header 1, flat tube 2, fin 3, first end plate 4, distributing pipe 9, second end plate 10 etc., pass in the locating hole 11 of distributing pipe 9 from second end plate 10 as can be seen, and and its be welded as a whole, distributing pipe 9 is provided with a plurality of dispensing orifices 8, first port 5 of distributing pipe 9 is openings, and do not have fixedly connected, form the single armed overhung construction, owing to the gravity effects of distributing pipe 9 itself have the trend that lets droop, the flow velocity of heat-exchange working medium is very fast simultaneously, and the heat-exchange working medium of gas-liquid mixed makes the discontinuity on the distributing pipe 9, more aggravate the unstability of single armed overhung construction, be easy to produce vibration and noise.Because first port 5 of distributing pipe 9 is openings, and when heat-exchange working medium enters distributing pipe 9, can form bigger flow velocity at first port, 5 places of distributing pipe 9, and the flow that causes the heat-exchange working medium at this place is greater than the heat-exchange working medium that flows out from dispensing orifice 8, thus the imbalance that causes heat-exchange working medium to flow.
Stationary dispensing tube how better? because the integral braze-welded form of the general employing of micro-channel heat exchanger, contact-making surface in the soldering welding is covered with brazing solder, simultaneously, in order to guarantee brazing quality, gap between the contact-making surface upper-part of soldering place is very little, has increased difficulty to assembling setting, how under the situation that guarantees brazing quality, improve the efficient of making processing, become and improve the stable problem that faces that connects of distributing pipe.
Summary of the invention
Purpose of the present invention aim to provide a kind of simple and reasonable, machine volume is little, flexible operation, cost of manufacture is low, Energy Efficiency Ratio is high, applied widely micro-channel heat exchanger and preparation method thereof, to overcome weak point of the prior art.
A kind of micro-channel heat exchanger by this purpose design, comprise the flat tube that several are connected with header, be provided with center-aisle in the flat tube, fin is arranged between the flat tube, it is characterized in that being provided with in the header distributing pipe, the dispensing orifice of the intracavity inter-connection of setting and header on the sidewall of this distributing pipe;
First end of header is provided with first end plate, and first end plate is provided with recess, and first port of distributing pipe is inserted in the recess,
The outer wall welding fixing seal of the recess and first port.
The outer wall profile of the inwall profile of described recess and first port of distributing pipe is complementary.
It is coniform or round table-like that the cross section of described recess is, and the angle between the side of recess and the top of recess is α, and the scope at α angle is 30～80 degree; Perhaps, the cross section of recess is cylindric.
Described concave depth is 5～12mm.
Described recess is by mould extrusion process moulding to first end plate.
Be provided with the inner carriage or the locator protrusions that are used to support distributing pipe in the described header.
By being welded to connect, locator protrusions is via the header extrusion molding between described inner carriage and the header.
Second end of described header is provided with second end plate, and second end plate is provided with locating hole, and second port of distributing pipe passes locating hole, passes through the welding fixing seal between second port and the locating hole.
A kind of preparation method of micro-channel heat exchanger is characterized in that may further comprise the steps:
Step a, beginning;
Step b is fixed on first end plate on first end of header;
Step c passes locating hole on second end plate to the precalculated position with second port of distributing pipe;
Steps d stretches into first port of distributing pipe in the header, and first port of distributing pipe is inserted in the recess on first end plate, second end plate is fixed on second end of header;
Step e heats each above-mentioned parts, the soldering fixing seal;
Step f finishes.
The present invention is provided with recess on first end plate, first port of distributing pipe can be inserted in the recess, and both can weld and be fixed as one, from the two ends of distributing pipe it is fixed, to improve the stability of distributing pipe, simultaneously, first port of enclose distributor pipe makes the internal pressure of distributing pipe average.
Preparation method provided by the invention can improve the working (machining) efficiency of micro-channel heat exchanger greatly, and improves the stability of distributing pipe, and it has simple and reasonable, flexible operation, cost of manufacture is low, shunting is even and reliable and stable characteristics.
Description of drawings
Fig. 1 is the broken section structural representation of existing micro-channel heat exchanger.
Fig. 2 is the broken section structural representation of the embodiment of the invention one.
Fig. 3 is the main TV structure schematic diagram of second end plate.
Fig. 4 is that B-B among Fig. 3 is to the sectional structure schematic diagram.
Fig. 5 is the broken section structural representation of embodiment two.
Fig. 6 is that A-A among Fig. 5 is to the sectional structure schematic diagram.
Fig. 7 is the broken section structural representation of embodiment three.
Fig. 8 is the broken section structural representation of embodiment four.
Fig. 9 is the manufacture method flow chart of embodiment one.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described.
Embodiment one
Referring to Fig. 2-Fig. 3, the micro-channel heat exchanger among Fig. 2 comprises header 1, flat tube 2, fin 3, first end plate 4, distributing pipe 9, second end plate 10, be arranged on dispensing orifice 8 on the distributing pipe 9, be arranged on recess 6 on first end plate 4, import 12, distributing pipe first port 5 of distributing pipe, be arranged on the locating hole 11 on second end plate 10, first end 14 of header 1, second end 15 of header 1, second port one 3 of distributing pipe.
Be provided with center-aisle in the flat tube 2, fin 3 is arranged between the flat tube 2, is provided with distributing pipe 9 in the header 1, and the sidewall of distributing pipe 9 is provided with the dispensing orifice 8 of the inner chamber that can lead to header 1.
First end plate 4 of header is provided with recess 6, and the depth H of recess 6 is 5～12mm.This recess 6 is when assembling, and first port 5 of distributing pipe 9 is inserted in the recess 6 of first end plate 4, and recess 6 is fixing with first port, the 5 outer walls welding of distributing pipe 9.Second end 15 of header 1 is provided with second end plate, 10, the second end plates 10 and is provided with locating hole 11.
Referring to Fig. 3-Fig. 4, can see that second end plate 10 is provided with locating hole 11, first port 5 of distributing pipe 9 passes from this locating hole 11, after welding, forms fixedlying connected of second end plate 10 and distributing pipe 9.In other words be exactly that second port one 3 of distributing pipe 9 passes between locating hole 11, the second port ones 3 and the locating hole 11 by the welding fixing seal.
Fixedly connected for welding between first end plate 4 and the header 1, first port 5 of distributing pipe 9 is inserted into the recess 6 that is positioned on first end plate, make the other end of single armed overhung construction, here be meant first port 5 of distributing pipe 9, can be connected on first end plate 4, what thereby the gravity that makes distributing pipe 9 was more stable bears, and makes that distributing pipe can be very stable when the gas-liquid mixed heat-exchange working medium flows.
In embodiment one, the outer wall form fit of the inwall profile of recess 6 and distributing pipe first port 5, concrete, recess 6 adopts columniform depression, this depression is to add man-hour at first end plate 4, by mould extrusion modling processing, in the arranged outside of first end plate 4 projection is arranged, the height H that the bottom of recess 6 exceeds first end plate, 4 inner faces is 6mm.The cross section of recess 6 is circular, and the cross section of first port, 5 outer walls of distributing pipe 9 is circular, and promptly recess 6 is corresponding with the outer wall shape of first port 5 of distributing pipe.Columniform recess 6 and the welding of first port, 5 outer walls can have bigger solder side, guarantee can not produce heat-exchange working medium and reveal.Both can realize connecting more closely and sealing, and heat-exchange working medium can't outwards flow out from first port 5, and distributing pipe 9 distributes heat-exchange working medium more even.
Introduce the manufacture method of the embodiment of the invention one below, owing to adopt integral braze-welded welding, contact-making surface in the soldering welding is covered with brazing solder, simultaneously, in order to guarantee brazing quality, gap between each parts on the contact-making surface of soldering place is very little, and the gap often smaller or equal to 150 microns, has increased difficulty to assembling setting.The form that needs in each parts processing cost inventive embodiments one, prior art can processing and fabricating, as first end plate 4, can adopt the mould extrusion modling to finish.
Referring to Fig. 9, the fixing concrete manufacturing step of distributing pipe comprises in the header of the micro-channel heat exchanger of the embodiment of the invention one:
Step a, beginning;
Step b is fixed on first end plate 4 on first end 14 of header 1;
Step c passes locating hole 11 on second end plate 10 to the precalculated position with second port one 3 of distributing pipe 9;
Steps d stretches into first port 5 of distributing pipe 9 in the header 1, in the recess 6 that first port 5 of distributing pipe 9 is inserted on first end plate 4, second end plate 10 is fixed on second end 15 of header 1;
Step e heats each above-mentioned parts, the soldering fixing seal;
Step f finishes.
When the described precalculated position of top step c is deisgn product, the relative position relation that is between each parts, as: after machining, first end plate 4 is in a certain particular location of first port 5.
Step b, step c, steps d, four steps of step e all under the prerequisite of ensuring the quality of products, reduce the length that moves relative between each parts as far as possible, thereby reduce the operating time, improve and make efficient.
Concrete, as step c, practical operation is that second port one 3 with distributing pipe 9 passes locating hole 11 to the precalculated position from second end plate 10 to header 1 medial surface, makes distributing pipe 9 remaining long parts need not pass through locating hole 11.
Embodiment two
The embodiment of the invention two is with embodiment one difference, as Fig. 5-shown in Figure 6, also be provided with inner carriage 7 in the header 1 of embodiment two, be used to support distributing pipe 9, as shown in Figure 6, these inner carriage 7 tops are crooked shape, and the bottom is connected with header 1, in the present embodiment, inner carriage 7 adopts the form of welding to fix with the tube wall of header 1.Inner carriage 7 can hold up distributing pipe 9 like this, further reduces the vibration of distributing pipe 9.Also can be covered with brazing material between inner carriage 7 and distributing pipe 9, then by integral solder, what both can be more stable is connected and fixed, and reduces the better effects if of vibration and noise.
Adopt another benefit of inner carriage 7 to be, in manufacturing step d, when distributing pipe stretches into forward, can contact inner carriage 7 earlier, and the height of inner carriage 7 and teat 6 are on same level, therefore can be placed on distributing pipe on the inner carriage 7, push away first port 5 that just can make teat 6 stretch into distributing pipe smoothly forward.The position of the inner carriage 7 here also can be used as a precalculated position described in step c, plays the effect of location.
All the other are not stated part and see embodiment one, no longer repeat.
Embodiment three
The embodiment of the invention three is that with the difference of embodiment two as shown in Figure 7, the locator protrusions 27 in the header 7 of embodiment three is not to be connected with header by welding manner, but by mechanical presses moulding in header.Same, this locator protrusions 27 can hold up distributing pipe 9, reduces vibration.Adopt the benefit of the locator protrusions 27 among the embodiment three to be, because just can machine-shaping before heating soldering.In manufacturing step d, distributing pipe is pressed on the locator protrusions 27, and this is an one because of locator protrusions 27 and header, can not influence its quality.And among the embodiment two, do not have heating soldering before, inner carriage 7 also not and the header fusion fix.Certainly, in the present embodiment, locator protrusions 27 also has as the positioning action among the embodiment two.
All the other are not stated part and see embodiment two, no longer repeat.
Embodiment four
The difference that the present invention executes example four and embodiment one is, as shown in Figure 8, the depression of the recess 6 of embodiment four is to be coniform or round table-like, the bottom in the cross section of this depression is less circle, the top in cross section is bigger circle, in the present embodiment, the height of recess 6 is 10mm, one effect in conjunction with the embodiments, the height of recess 6 is between 5～12mm the time, guarantee the stability that distributing pipe is fixing on the one hand, take into account the difficulty and the utilization that reduces the distributing pipe effective length of processing and manufacturing on the other hand.
Angle between the top of the side of recess 6 and recess 6 is α, and then the angular range of α is * *～* * degree, in this angular range, in the time of can making first port stretch into recess on the one hand, can play the effect of guiding; Take into account the difficulty and the utilization that reduces the distributing pipe effective length of processing and manufacturing on the other hand.First port of the distributing pipe in the present embodiment is circular, because the maximum gauge of first port is less than the maximum gauge of the top cross-section of recess 6, first port is easy to insert accurately recess, particularly when operation, changing distributing pipe 9 enters from second end 15 of header, so, be easy to extend in first port 5 and become very important, can offer convenience to assembling.All the other are not stated part and see embodiment three, no longer repeat.
Claims (9)
1. micro-channel heat exchanger, comprise the flat tube (2) that several are connected with header (1), flat tube is provided with center-aisle in (2), fin (3) is arranged between the flat tube (2), it is characterized in that being provided with distributing pipe (9) in the header (1) dispensing orifice (8) of the intracavity inter-connection of setting and header (1) on the sidewall of this distributing pipe (9);
First end (14) of header (1) is provided with first end plate (4), and first end plate (4) is provided with recess (6), and first port (5) of distributing pipe (9) is inserted in the recess (6),
Recess (6) welds fixing seal with the outer wall of first port (5).
2. micro-channel heat exchanger according to claim 1 is characterized in that the outer wall profile of first port (5) of the inwall profile of described recess (6) and distributing pipe (9) is complementary.
3. micro-channel heat exchanger according to claim 1 is characterized in that the cross section of described recess (6) is coniform or round table-like, and the angle between the top of the side of recess (6) and recess (6) is α, and the scope at α angle is 30～80 degree; Perhaps, the cross section of recess (6) is cylindric.
4. micro-channel heat exchanger according to claim 1 is characterized in that the degree of depth (H) of described recess (6) is 5～12mm.
5. micro-channel heat exchanger according to claim 1 is characterized in that described recess (6) is by mould extrusion process moulding to first end plate.
6. micro-channel heat exchanger according to claim 1 is characterized in that being provided with in the described header (1) inner carriage (7) or the locator protrusions (27) that are used to support distributing pipe (9).
7. micro-channel heat exchanger according to claim 6 is characterized in that between described inner carriage (7) and the header (1) that by being welded to connect, locator protrusions (27) is via header (1) extrusion molding.
8. according to the arbitrary described micro-channel heat exchanger of claim 1 to 7, second end (15) that it is characterized in that described header (1) is provided with second end plate (10), second end plate (10) is provided with locating hole (11), second port (13) of distributing pipe (9) passes locating hole (11), passes through the welding fixing seal between second port (13) and the locating hole (11).
9. the preparation method of a micro-channel heat exchanger as claimed in claim 1 is characterized in that may further comprise the steps:
Step a, beginning;
Step b is fixed on first end plate (4) on first end (14) of header (1);
Step c passes locating hole (11) on second end plate (10) to the precalculated position with second port (13) of distributing pipe (9);
Steps d stretches into first port (5) of distributing pipe (9) in the header (1), and first port (5) of distributing pipe (9) is inserted in the recess (6) on first end plate (4), second end plate (10) is fixed on second end (15) of header (1);
Step e heats each above-mentioned parts, the soldering fixing seal;
Step f finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110132839 CN102278909A (en) | 2011-05-20 | 2011-05-20 | Microchannel heat exchanger and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110132839 CN102278909A (en) | 2011-05-20 | 2011-05-20 | Microchannel heat exchanger and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102278909A true CN102278909A (en) | 2011-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110132839 Pending CN102278909A (en) | 2011-05-20 | 2011-05-20 | Microchannel heat exchanger and manufacturing method thereof |
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| CN (1) | CN102278909A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880115A (en) * | 2014-02-27 | 2015-09-02 | 杭州三花研究院有限公司 | Collecting pipe assembly and heat exchanger |
| CN104949394A (en) * | 2014-03-26 | 2015-09-30 | 杭州三花研究院有限公司 | Heat exchanger |
| CN105485972A (en) * | 2014-09-18 | 2016-04-13 | 浙江盾安人工环境股份有限公司 | Micro-channel heat exchanger and mounting method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1684083A (en) * | 1927-06-02 | 1928-09-11 | Samuel C Bloom | Refrigerating coil |
| KR20040006460A (en) * | 2002-07-12 | 2004-01-24 | 한라공조주식회사 | Heat exchanger |
| CN201476625U (en) * | 2009-06-15 | 2010-05-19 | 浙江康盛股份有限公司 | Micro-channel condenser |
| CN101893403A (en) * | 2010-08-05 | 2010-11-24 | 浙江金宸三普换热器有限公司 | Novel parallel flow heat exchanger with uniform distribution structure |
-
2011
- 2011-05-20 CN CN 201110132839 patent/CN102278909A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1684083A (en) * | 1927-06-02 | 1928-09-11 | Samuel C Bloom | Refrigerating coil |
| KR20040006460A (en) * | 2002-07-12 | 2004-01-24 | 한라공조주식회사 | Heat exchanger |
| CN201476625U (en) * | 2009-06-15 | 2010-05-19 | 浙江康盛股份有限公司 | Micro-channel condenser |
| CN101893403A (en) * | 2010-08-05 | 2010-11-24 | 浙江金宸三普换热器有限公司 | Novel parallel flow heat exchanger with uniform distribution structure |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104880115A (en) * | 2014-02-27 | 2015-09-02 | 杭州三花研究院有限公司 | Collecting pipe assembly and heat exchanger |
| CN104949394A (en) * | 2014-03-26 | 2015-09-30 | 杭州三花研究院有限公司 | Heat exchanger |
| CN104949394B (en) * | 2014-03-26 | 2019-05-24 | 杭州三花研究院有限公司 | A kind of heat exchanger |
| CN105485972A (en) * | 2014-09-18 | 2016-04-13 | 浙江盾安人工环境股份有限公司 | Micro-channel heat exchanger and mounting method |
| CN105485972B (en) * | 2014-09-18 | 2019-12-03 | 浙江盾安人工环境股份有限公司 | A kind of micro-channel heat exchanger and installation method |
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Application publication date: 20111214 |