CN101526285B - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN101526285B CN101526285B CN2008100065551A CN200810006555A CN101526285B CN 101526285 B CN101526285 B CN 101526285B CN 2008100065551 A CN2008100065551 A CN 2008100065551A CN 200810006555 A CN200810006555 A CN 200810006555A CN 101526285 B CN101526285 B CN 101526285B
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- heat exchanger
- flat runner
- runner pipe
- cushion block
- coupling components
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Abstract
The invention discloses a heat exchanger, which relates to a heat exchange device used in a refrigeration system. The key design point of the heat exchanger comprises: the heat exchanger comprises connecting components which are arranged at the end parts of flat runner pipes close to liquid collecting pipes; the connecting components comprise connecting parts, at least one cushion block and at least one fastener, wherein each connecting part is arranged on one side of the width direction of each of the flat runner pipes; the at least one cushion block is arranged on the other side of the width direction of each of the flat runner pipes; and the least one fastener passes through the clearance between two adjacent flat runner pipes to connect and fix the connecting components and the cushion blocks. Preferably, the supported walls of the connecting components cover the clearance between the liquid collecting pipes and adjacent plate sheets. The heat exchanger has the advantage of simple and reliable structure. As the outside wind blown to the heat exchanger completely passes through the plate sheets between the flat runner pipes for heat exchange, the thermal efficiency of the heat exchanger is improved, and the heat exchanger is particularly suitable for refrigeration air-conditioning units.
Description
Technical field
The present invention relates to a kind of heat-exchange device, be specifically related to a kind of heat exchanger that in refrigeration system, uses.
Background technology
In the existing refrigeration system, the various forms of heat exchanger structures that comprise pipeline (being collector tube) are roughly the same, its body is mainly by a pair of collector tube that is parallel to each other and is separated from each other, this collector tube be used for collecting heat exchanger other conduits cold-producing medium or cold-producing medium is assigned in other conduits of heat exchanger; The two ends of many parallel distributions are connected to the flat runner pipe of described collector tube inner chamber respectively; And the plate that is aliform that is arranged between every pair of flat runner pipe is formed; In collector tube, also be provided with the flow direction that the dividing plate that its inner chamber is separated into mutual airtight chamber limits the cold-producing medium in the flat runner pipe, on collector tube, also be provided with the inlet tube that cold-producing medium flows into and the outlet of outflow; As shown in Figure 1, this figure is the schematic diagram of position relation between collector tube, flat runner pipe and the plate of existing heat exchanger, and among the figure: part 20 is a collector tube, and part 30 is the flat runner pipe, and part 40 is a plate.In the working cycles, cold-producing medium enters collector tube from inlet tube (not shown), because dividing plate (not shown) is divided into upper and lower disconnected two parts with this collector tube, after the aperture of cold-producing medium in the flat runner pipe flows to the collector tube of the other end from the collector tube of an end, flow back to by other flat runner pipes again, cold-producing medium is when flowing, and the air of blowing over plate between the flat runner pipe carries out heat exchange, after outlet (not shown) outflow heat exchanger.
For the ease of heat exchanger is connected with support unit, perhaps other related accessories is fixed on the heat exchanger, usually soldering fixed connecting part on the collector tube of heat exchanger.Position between the weldment need be before soldering relative fixed, in the practical operation, adopt stationary fixture usually or coupling components be welded in by point and realize on the collector tube pre-fixing before the weldering.But aforesaid way complex structure, manufacturability are poor; In addition, at the bigger heat exchanger body of heat exchange area, the weight of himself is also heavier, so the weight that this coupling components bore is relatively large, and weld strength between collector tube and the flat runner pipe is also had relatively high expectations.
On the other hand, as shown in Figure 1, if the distance L between plate and the collector tube is too small, when the heat exchanger body integral solder, the solder flux that part is melted can flow to plate under the capillarity of plate, cause the solder flux of flat runner pipe and collector tube weld part less, thereby influence the welding quality between flat runner pipe and the collector tube, directly influence the reliability indexs such as voltage endurance capability of heat exchanger; Therefore, between the plate between the collector tube of the heat exchanger flat runner pipe parallel, gap S is set usually with two.Because the existence of this gap S, in actual use, part wind can directly pass through from this gap, thereby the air quantity that flows through plate is reduced, and causes the problem of the corresponding decline of the thermal efficiency of heat exchanger.
Therefore, how reasonable configuration is installed coupling components on heat exchanger, and avoids the thermal efficiency problem of the gap affects heat exchanger between collector tube and the plate, is that those skilled in the art make great efforts the problem that solves always.
Summary of the invention
At above-mentioned defective, the technical problem that the present invention solves is, a kind of heat exchanger is provided, and utilizes securing member to realize the fixing of coupling components and heat exchanger body, and assembly technology is simple, connection is reliable; In addition, improve the thermal efficiency of heat exchanger by the gap S between coupling components covering collector tube and the adjacent plate.
Heat exchanger provided by the invention comprises:
The a pair of collector tube that is parallel to each other and is separated from each other;
The flat runner pipe of some parallel distributions, the two ends of described flat runner pipe are connected to the inner chamber of described collector tube respectively; With
Be arranged on the plate that is aliform between the adjacent flat shape runner pipe; Also comprise
Coupling assembly, described coupling assembly are arranged on the end near the described flat runner pipe of collector tube, and this coupling assembly comprises:
Coupling components places the side on the flat runner pipe width;
At least one cushion block places the opposite side on the flat runner pipe width; With
At least one securing member, the gap of passing between the two adjacent flat runner pipe is connected and fixed described coupling components and cushion block.
Preferably, described coupling components is two, is separately positioned on the both ends near the described flat runner pipe of collector tube.
Preferably, the bearing surface of described coupling components and flat runner pipe covers the gap S between described collector tube and the adjacent described plate.
Preferably, the cross sectional shape of described cushion block is up-small and down-big shape, and its small end places between adjacent two flat runner pipes and the step surface of its both sides connects with the flat runner pipe respectively.
The small end of described cushion block is provided with the connecting hole that is connected with securing member.
The step surface that connects with the flat runner pipe respectively of described cushion block both sides is an inner concave.
Preferably, described cushion block is a section bar.
The material of described cushion block can be aluminium, aluminium alloy or plastics.
Preferably, the cross sectional shape of described coupling components is a bending-like; Wherein, with flat runner pipe contact side be contacting wall, with the opposite side of contacting wall be lateral wall.
The contacting wall of described coupling components is provided with securing member and installs through hole, on the lateral wall of described coupling components with described contacting wall on the relative position place that installs through hole be provided with the technology opening.
Preferably, described coupling components is that sheet material is processed into or section bar.
Heat exchanger provided by the invention compared with prior art, described coupling components and cushion block place the both sides of flat runner pipe respectively, the gap that securing member passes between the adjacent flat runner pipe is fixed as one coupling components and securing member, assembling process need not the special configuration frock clamp, has reduced the requirement to assembly technology; Simple in structure, connect reliably, eliminated the weight that coupling components bore fully when relatively large, to the influence of body weld strength.
In the preferred implementation of the present invention, the contacting wall of described coupling assembly covers the gap between described collector tube and the adjacent plate.Therefore, the outside is blown over the plate that the wind of heat exchanger all flows through between the flat runner pipe and is carried out heat exchange, has improved the thermal efficiency of heat exchanger.
Heat exchanger provided by the invention is applicable to the refrigeration system of air as cooling medium, is specially adapted to the refrigeration air-conditioner unit.
Description of drawings
Fig. 1 is the schematic diagram of position relation between collector tube, flat runner pipe and the plate of existing heat exchanger;
Fig. 2 is the front view of heat exchanger provided by the invention;
Fig. 3 is the H portion enlarged drawing of Fig. 2;
Fig. 4 is the vertical view of Fig. 2;
Fig. 5 is the cross sectional representation of coupling components 5, and wherein Fig. 5 a and Fig. 5 b illustrate two kinds of preferred structures respectively;
Fig. 6 is the K portion enlarged drawing of Fig. 4;
Fig. 7 is the R-R direction cutaway view of Fig. 3, and wherein Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d and Fig. 7 e illustrate five kinds of preferred cushion block 6 structures and connected mode thereof respectively;
Among Fig. 2-Fig. 7:
Heat exchanger 1;
Plate 4;
Securing member 7.
The specific embodiment
Specify present embodiment below in conjunction with Figure of description.
Referring to Fig. 2 and Fig. 4, Fig. 2 is the front view of heat exchanger provided by the invention, and Fig. 4 is the vertical view of Fig. 2.As shown in the figure, heat exchanger 1 of the present invention comprises:
The a pair of collector tube that is parallel to each other and is separated from each other 2;
The flat runner pipe 3 of some parallel distributions, the two ends of described flat runner pipe 3 are connected to the inner chamber 21 of described collector tube 2 respectively;
Be arranged on the plate that is aliform 4 between the adjacent flat shape runner pipe 3;
Coupling assembly, described coupling assembly are arranged on the end near the described flat runner pipe 3 of collector tube 2, and this coupling assembly comprises:
At least one cushion block 6 places the opposite side on flat runner pipe 3 widths; With
At least one securing member 7, the gap of passing between the two adjacent flat runner pipe 3 is connected and fixed described coupling components 5 and cushion block 6.
In collector tube 2, also be provided with the flow direction that the dividing plate (not shown) that its inner chamber 21 is separated into mutual airtight chamber limits the cold-producing medium in the flat runner pipe 3, on collector tube 2, be provided with the inlet tube (not shown) that cold-producing medium flows into and the outlet (not shown) of outflow.During system works, cold-producing medium enters the inner chamber 21 of header 2 from inlet tube, during through flat runner pipe 3, carry out heat exchange by plate 4 and external environment after, flow out from outlet again.
As shown in Figure 2, described coupling assembly is two, is separately positioned on the position of flat runner pipe 3 two ends near collector tube 2.Structure and each assembly position, connected mode each other for more detailed description coupling components 5 and cushion block 6 see also Fig. 3, and this figure is the H portion enlarged drawing of Fig. 2.
As shown in Figure 3, the cross sectional shape of described coupling components 5 is a bending-like; Wherein, with flat runner pipe 3 contact sides be contacting wall 51, with the opposite side of contacting wall 51 be lateral wall 52, form the hemi-closure space 55 that is similar to open slot between the contacting wall 51 of described coupling components 5 and the lateral wall 52.
When actual project installation, the air-conditioner annex can insert finish in the hemi-closure space 55 of the open slot that is fixed on the relative coupling components 5 in heat exchanger 1 two ends fixing, or heat exchanger is inserted into the fixed position of air-conditioning by " open slot " of the relative coupling components 5 in two ends, simple in structure, connect reliable.
As shown in Figure 4, described coupling assembly is two, is separately positioned on the both ends near the described flat runner pipe 3 of collector tube 2.Be understandable that described cushion block 6 and securing member 7 can be according to the area of heat exchanger 1 and weight a plurality of along being set on the length direction of collector tube 2.
The concrete structure of described coupling components 5 sees Fig. 5 for details, and this figure is the cross sectional representation of coupling components 5, and wherein Fig. 5 a and Fig. 5 b illustrate two kinds of preferred structures respectively.
Shown in Fig. 5 a, the shape of coupling components 5 cross sections is " U " shape bending-like structure; Shown in Fig. 5 b, the shape of the cross section of coupling components 5 is " ∠ " shape bending-like structure.Wherein, the securing member that is provided with 6 riveted joints of described cushion block or thread connection of the contacting wall 51 of coupling components 5 installs through hole 53; Be provided with technology opening 54 in corresponding position, be convenient to use assembly tool mounting screw or rivet on the technology, coupling components 5 is affixed on the flat runner pipe 3 of heat exchanger 1 with contacting wall 51 opposite external side walls 52.
The position of described technology opening 54 can be referring to Fig. 6, and this figure is the K portion enlarged drawing of Fig. 4.Be understandable that, shape and size for technology opening 54 do not have specific requirement, only need consider the structural strength of coupling components 5 during design, and use the needs of the assembly space of assembly tool mounting screw or rivet, coupling components 5 is affixed on the flat runner pipe 3 of heat exchanger 1 and gets final product.
Specify that some shape of the cross section of described coupling components 5 is not limited to the bending-like of above-mentioned " U " shape and two kinds of forms of " ∠ " shape, so long as use distressed structure that needs do all in the protection domain of this patent for satisfying.
The material of described coupling components 5 can be selected the metal sheet identical with heat exchanger 1 for use, also can select nonmetallic materials such as plastics for use.Specifically, consider that from the angle of manufacturing cost described coupling components 5 can adopt plate stamping to be processed into, to reduce cost; Consider that from the angle of enhancing productivity described coupling components 5 can be designed to section bar according to shape of product.
The concrete structure of described cushion block 6 sees Fig. 7 for details, and this figure is the R-R direction cutaway view of Fig. 3, and wherein Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d and Fig. 7 e illustrate five kinds of preferred cushion block 6 structures and connected mode thereof respectively.
As shown in the figure, the cross sectional shape of described cushion block 6 is up-small and down-big shape, and its small end 65 places between adjacent two flat runner pipes 3 and the step surface 63 of its both sides connects with the opposite side relative with coupling components 5 of flat runner pipe 3 respectively.On the small end 65 that places the described cushion block 6 between two flat runner pipes 3, be provided with the connecting hole 61 that is connected with securing member.
Specify the structure and the connected mode thereof of five kinds of preferred cushion blocks 6 below respectively in conjunction with Fig. 7 a, Fig. 7 b, Fig. 7 c, Fig. 7 d and Fig. 7 e.
Shown in Fig. 7 a, the cross sectional shape of described cushion block 6 is up-small and down-big convex shape, and the middle part is provided with enclosed cavity 62; The securing member connecting hole 61 of the small end 65 of described cushion block 6 is a tapped through hole, and described securing member 7 adopts bolt.
During practical set, the step surface 63 of its both sides respectively with the flat runner pipe 3 of both sides against, the securing member that described bolt passes coupling components 5 from top to bottom installs through hole 53 and cushion block 6 thread connection, realize fixedlying connected between coupling components 5 and the cushion block 6, coupling components 5 is fixed on the position of the close collector tube 2 in flat runner pipe 3 two ends.
Shown in Fig. 7 b, described cushion block 6 is that with the difference of cushion block 6 shown in Fig. 7 a the securing member connecting hole 61 of cushion block 6 small end 65 is a clear opening, and described securing member 7 adopts rivet.During practical set, realize fixedlying connected between coupling components 5 and the cushion block 6, coupling components 5 is fixed on the position of the close collector tube 2 in flat runner pipe 3 two ends by rivet.
Shown in Fig. 7 c, described cushion block 6 is that with the difference of cushion block 6 shown in Fig. 7 a two step surfaces 63 of cushion block 6 are inner concave with the place of offseting of both sides flat runner pipe 3; The securing member connecting hole 61 of described cushion block 6 small end 65 is a tapped through hole, and described securing member 7 adopts bolt.Like this, when practical set, the step surface 63 of the both sides of described cushion block 6 (being inner concave in this example) respectively with the flat runner pipe 3 of both sides against, flat runner pipe 3 that can be better parallel with two against, avoid producing and slide; The securing member that described bolt passes coupling components 5 from top to bottom installs through hole 53 and cushion block 6 thread connection, realizes fixedlying connected between coupling components 5 and the cushion block 6, coupling components 5 is fixed on the position of the close collector tube 2 in flat runner pipe 3 two ends.
Shown in Fig. 7 d, the cross sectional shape of described cushion block 6 is up-small and down-big convex shape, and its lower surface is provided with inner groovy 64, and the securing member connecting hole 61 of cushion block 6 small end 65 is a clear opening, and described securing member 7 adopts rivet.The design of described inner groovy 64 can improve the manufacturability of cushion block 6 processing.During practical set, realize fixedlying connected between coupling components 5 and the cushion block 6, coupling components 5 is fixed on the position of the close collector tube 2 in flat runner pipe 3 two ends by rivet.
Shown in Fig. 7 e, the cross sectional shape of described cushion block 6 is up-small and down-big convex shape, and different is not to be designed to have the structure of inner chamber or groove with the cushion block 6 of above-mentioned four kinds of structures.By contrast, structure is simpler.Be understandable that the assembling of this kind structure cushion block 6 both can select for use bolt also can select rivet for use with securing member 7, and was not limited to the Bolt Connection shown in the figure.
Equally, the planform of described cushion block 6 and connected mode are not limited to above-mentioned five kinds of situations, so long as for satisfy using distressed structure that needs do all in the protection domain of this patent.
The material of described cushion block 6 can be selected shape for use, the preferred use and the identical aluminum alloy material of heat exchanger 1 material; Also can select nonmetallic section bar or single-piece injected plastics material for use.
Especially, as shown in Figure 3 and Figure 4, for avoiding body at heat exchanger 1 in welding process, the solder flux of thawing flows to plate under the capillarity of plate, cause the solder flux little effect flat runner pipe of flat runner pipe and collector tube weld part and the welding quality between the collector tube.In the scheme that the present invention provides, remain with gap S between the plate that the collector tube 2 of the heat exchanger 1 flat runner pipe parallel with two is 3, contacting wall 51 by described coupling components 5 has covered described gap S, remedied structural defective, the plate that the wind that makes the outside blow over heat exchanger is all flowed through between the flat runner pipe carries out heat exchange, has improved the thermal efficiency of heat exchanger.In sum, technical scheme of the present invention is simple in structure, technology is reliable.Avoided that coupling components is connected existing complex process with the heat exchanger body soldering, the problem that bearing capacity is low in the prior art; Simultaneously, the contacting wall of described coupling components covers the gap between collector tube and the adjacent plate, has avoided exogenous wind from this gap shunting, and then can improve the complete machine thermal efficiency.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (12)
1. heat exchanger comprises:
The a pair of collector tube that is parallel to each other and is separated from each other;
The flat runner pipe of some parallel distributions, the two ends of described flat runner pipe are connected to the inner chamber of described collector tube respectively; With
Be arranged on the plate that is aliform between the adjacent flat shape runner pipe; It is characterized in that, also comprise
Coupling assembly, described coupling assembly are arranged on the end near the described flat runner pipe of collector tube, and this coupling assembly comprises:
Coupling components places the side on the flat runner pipe width, and the bearing surface of described coupling components and flat runner pipe covers the gap S between described collector tube and the adjacent described plate;
At least one cushion block places the opposite side on the flat runner pipe width; With
At least one securing member, the gap of passing between the two adjacent flat runner pipe is connected and fixed described coupling components and cushion block.
2. heat exchanger according to claim 1 is characterized in that described coupling components is two, is separately positioned on the both ends near the described flat runner pipe of collector tube.
3. heat exchanger according to claim 2 is characterized in that, the cross sectional shape of described cushion block is up-small and down-big shape, and its small end places between adjacent two flat runner pipes and the step surface of its both sides connects with the flat runner pipe respectively.
4. heat exchanger according to claim 3 is characterized in that the small end of described cushion block is provided with the connecting hole that is connected with securing member.
5. heat exchanger according to claim 4 is characterized in that, the step surface that connects with the flat runner pipe respectively of described cushion block both sides is an inner concave.
6. according to the described heat exchanger of arbitrary claim in the claim 1 to 5, it is characterized in that described cushion block is a section bar.
7. heat exchanger according to claim 6 is characterized in that, the material of described cushion block is an aluminum or aluminum alloy.
8. heat exchanger according to claim 6 is characterized in that, the material of described cushion block is plastics.
9. according to the described heat exchanger of arbitrary right in the claim 1 to 6, it is characterized in that the cross sectional shape of described coupling components is a bending-like; Wherein, with flat runner pipe contact side be contacting wall, with the opposite side of contacting wall be lateral wall.
10. heat exchanger according to claim 9 is characterized in that the contacting wall of described coupling components is provided with securing member and installs through hole, on the lateral wall of described coupling components with described contacting wall on the relative position place that installs through hole be provided with the technology opening.
11. heat exchanger according to claim 9 is characterized in that, described coupling components is that sheet material is processed into.
12. heat exchanger according to claim 9 is characterized in that, described coupling components is a section bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100065551A CN101526285B (en) | 2008-03-06 | 2008-03-06 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100065551A CN101526285B (en) | 2008-03-06 | 2008-03-06 | Heat exchanger |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101526285A CN101526285A (en) | 2009-09-09 |
| CN101526285B true CN101526285B (en) | 2010-12-01 |
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ID=41094293
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100065551A Active CN101526285B (en) | 2008-03-06 | 2008-03-06 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101526285B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127466A (en) * | 1989-10-06 | 1992-07-07 | Sanden Corporation | Heat exchanger with header bracket and insertable header plate |
| DE4232019C1 (en) * | 1992-09-24 | 1993-10-28 | Thermal Waerme Kaelte Klima | Retainer for heat exchanger for road vehicle - comprises two holder components which are tensioned against two opposing face sides of pair of adjacent flat tubes by screw or rivet union |
| CN1087168A (en) * | 1992-08-27 | 1994-05-25 | 三电有限公司 | The geometrical clamp that is used for heat exchanger |
| US5429181A (en) * | 1992-04-16 | 1995-07-04 | Valeo Thermique Moteur | Fastening device for a heat exchanger having a tubular header |
| US5538079A (en) * | 1994-02-16 | 1996-07-23 | Pawlick; Daniel R. | Heat exchanger with oblong grommetted tubes and locating plates |
-
2008
- 2008-03-06 CN CN2008100065551A patent/CN101526285B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5127466A (en) * | 1989-10-06 | 1992-07-07 | Sanden Corporation | Heat exchanger with header bracket and insertable header plate |
| US5429181A (en) * | 1992-04-16 | 1995-07-04 | Valeo Thermique Moteur | Fastening device for a heat exchanger having a tubular header |
| CN1087168A (en) * | 1992-08-27 | 1994-05-25 | 三电有限公司 | The geometrical clamp that is used for heat exchanger |
| DE4232019C1 (en) * | 1992-09-24 | 1993-10-28 | Thermal Waerme Kaelte Klima | Retainer for heat exchanger for road vehicle - comprises two holder components which are tensioned against two opposing face sides of pair of adjacent flat tubes by screw or rivet union |
| US5538079A (en) * | 1994-02-16 | 1996-07-23 | Pawlick; Daniel R. | Heat exchanger with oblong grommetted tubes and locating plates |
Non-Patent Citations (1)
| Title |
|---|
| JP特开平9170894A 1997.06.30 |
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| CN101526285A (en) | 2009-09-09 |
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Address after: 310018 Liquan, Xinchang, Shaoxing Province, Qixing County, Zhejiang Co-patentee after: DANFOSS A/S Patentee after: SANHUA HOLDING GROUP Co.,Ltd. Address before: 310018 three flower Industrial Park, No. 21, 60 Avenue, Hangzhou economic and Technological Development Zone, Zhejiang Patentee before: SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER Co.,Ltd. |
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Application publication date: 20090909 Assignee: SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER Co.,Ltd. Assignor: SANHUA HOLDING GROUP Co.,Ltd. Contract record no.: 2015990000010 Denomination of invention: Cleaning method for precipitated mud and sand on heat exchanger Granted publication date: 20101201 License type: Common License Record date: 20150106 |
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Effective date of registration: 20150302 Address after: 310018, No. 289-1, No. 12, Poplar Street, Hangzhou economic and Technological Development Zone, Hangzhou, Zhejiang Patentee after: SANHUA (HANGZHOU) MICRO CHANNEL HEAT EXCHANGER Co.,Ltd. Patentee after: DANFOSS A/S Address before: 310018 Liquan, Xinchang, Shaoxing Province, Qixing County, Zhejiang Patentee before: SANHUA HOLDING GROUP Co.,Ltd. Patentee before: DANFOSS A/S |