CN204806943U - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN204806943U CN204806943U CN201520499659.6U CN201520499659U CN204806943U CN 204806943 U CN204806943 U CN 204806943U CN 201520499659 U CN201520499659 U CN 201520499659U CN 204806943 U CN204806943 U CN 204806943U
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- heat exchanger
- flow plate
- extension tube
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Abstract
The utility model discloses a heat exchanger, heat transfer core include a plurality of first circulation board, the second circulation board of range upon range of setting, are formed with first -class way all of mutual spaced and second circulation passageway between first circulation board and the second circulation board, and each the second drill way stratification on the circulation board is the second channel, and the intercommunication is taken over outward with the second to the second channel, stretch the pipe in still being provided with in the second channel, the second channel through interior stretch the pipe with the intercommunication is taken over outward to the second. The utility model provides a heat exchanger can effectively restrain refrigerant gas, liquid lamination, reduces the shock of super -heated rate, improves the distribution degree of consistency of fluid in the circulation passageway to improve the heat transfer performance that the board traded.
Description
Technical field
The utility model relates to technical field of heat exchange, particularly a kind of heat exchanger.
Background technology
Plate type heat exchanger is defined as the heat exchanger that heat transfer element is made up of the plate that circulates, and circulation plate is its core component, and common fin type has: herringbone ripple, level are straight ripple, spherical ripple, oblique ripple and vertical ripple etc.In order to strengthen the heat transfer effect of plate type heat exchanger, people have carried out continuous research and development and improvement to its flow plate chip architecture.
Compared to traditional heat exchanger, the structure of plate type heat exchanger is very compact; Multiplex aluminum alloy materials manufacture, very lightly; Simultaneously due to the high-termal conductivity of the plate that circulates, plate type heat exchanger is made to have very high efficiency.Therefore, the adaptability of plate type heat exchanger is very strong, may be used for the heat exchange between various fluid and the phase-change heat-exchange of collection state change occurs; The different heat-exchanging state such as adverse current, cross-flow, multiple flow and multipass flow can be adapted to by the layout of runner and combination; The heat exchange needs of main equipment can be met by series, parallel between unit, series-parallel combination.
At present, plate type heat exchanger is widely used in the fields such as air separation plant, petrochemical industry, refrigeration and low temperature field, automobile and aircraft industry.
Along with improving constantly of heat exchanger instructions for use, the heat exchange property of plate type heat exchanger also needs further enhancing.This just requires that we carry out structural optimization to plate type heat exchanger, to obtain the plate type heat exchanger that passing rate of processing is higher, production cost is lower, heat exchange property is stronger.
Because the external pipeline of plate type heat exchanger is directly communicated with the inner flow passage of plate type heat exchanger, external fluid is fed directly in the distribution runner of plate type heat exchanger inside, when the two-phase flow body of low-temp low-pressure enters into the distribution runner of plate type heat exchanger from external pipeline, the flow velocity of fluid can reduce, and flow regime also can change thereupon.In distribution runner, the gas of fluid, the aggravation of liquid lamination, some gas of fluid entering into the runner between each plate is like this many, and some liquid is many, and then reduce its distributed uniform degree in each runner, the heat exchange property of this plate type heat exchanger is reduced.
Therefore how to provide a kind of gas of anti-fluid, liquid layering aggravation, the plate type heat exchanger improving the distributed uniform degree of fluid in each runner is the technical problem being instantly badly in need of solving.
Utility model content
In order to solve the above-mentioned technical problem existed in prior art, the utility model provides a kind of heat exchanger, can effectively solve the problems of the technologies described above.
The utility model provides a kind of heat exchanger, comprise the first extension tube attached (1), the second extension tube attached (2), the 3rd extension tube attached (3), the 4th extension tube attached (4) and heat exchange core body, it is characterized in that, described heat exchange core body comprises multiple first flow plate (6) and multiple second flow plate (7) of stacked setting, adjacent described first flow plate (6) and the second flow plate (7) form first-class circulation passage or second circulation passage, described first-class circulation passage and the spaced setting of second circulation passage, described first flow plate (6) comprises the first aperture (61) and the second aperture (62), described second flow plate (7) comprises the first aperture (71) and the second aperture (72), each described first aperture (61, 71) stacked formation one first passage, each described second aperture (62, 72) stacked formation one second channel, described first passage is communicated with described first extension tube attached (1), described second channel is communicated with described second extension tube attached (2), described first passage is communicated with by described first-class circulation passage or second circulation passage with second channel,
Also be provided with an inside extending tube (23) in described second channel, described second channel is communicated with described second extension tube attached by described inside extending tube (23).
Described first passage is communicated with described first-class circulation passage, and described second extension tube attached (2) is communicated with described first extension tube attached (1) by described first-class circulation passage, described first passage; The external diameter of described inside extending tube (23) is less than the internal diameter of described second aperture (62,72), and described inside extending tube (23) does not contact with the periphery of described second channel; Meet between the length h of described inside extending tube (23) and the length l of second channel: 0.1≤h/l≤0.6.
Meet between the length h of described inside extending tube (23) and the length l of second channel: 0.3≤h/l≤0.5.
Described inside extending tube (23) and described second extension tube attached (2) are structure as a whole, and described second extension tube attached (2) comprises external pipeline section (21), assembly structure (22) and described inside extending tube (23); The external diameter of described assembly structure (22) is greater than the external diameter of described external pipeline section (21) external diameter and inside extending tube (23).
On the stacked direction of described first flow plate (6) and the second flow plate (7), described first extension tube attached (1) and the second extension tube attached (2) are separately positioned on the relative both sides of described heat exchanger, and meet between the thickness D of the length L of the heat exchange area of described heat exchanger and described heat exchanger: 1≤L/D≤5.
Also be provided with side plate (5) in the outside of described heat exchange core body, described second extension tube attached (2) is welded and fixed by described assembly structure (22) and described side plate (5).
Described first flow plate (6) is provided with the first breach (65), described second flow plate (7) is provided with the second breach (75), each described first breach (65) is roughly positioned at a straight line, each described second breach (75) is also roughly positioned at a straight line, each described first breach (65) form straight line be positioned at each described second breach (75) organize straight left side or right side.
The flow plate that described first flow plate (6) and the second flow plate (7) are same shape and structure, at described heat exchanger, described first flow plate (6) rotates 180 ° relative to the second flow plate (7).
Described heat exchanger is evaporimeter, described first-class circulation passage is used for the circulation of cold-producing medium, described first extension tube attached (1) is communicated with by described first-class circulation passage with described second extension tube attached (2), the import that described first extension tube attached (1) is cold-producing medium, the outlet that described second extension tube attached (2) is cold-producing medium.
The internal diameter of described first extension tube attached (1) is less than the internal diameter of described second extension tube attached (2), described first flow plate (6) also comprises the 3rd aperture (63) and the 4th aperture (64), described second flow plate (7) comprises the 3rd aperture (73) and the 4th aperture (74), 3rd aperture (63) of described first flow plate (6), 3rd aperture (73) stacked formation one third channel of described second flow plate (7), 4th aperture (64) of described first flow plate (6), 4th aperture (74) stacked formation one four-way of described second flow plate (7), third channel is communicated with by second circulation passage with four-way.
Utility model by arranging short tube in plate type heat exchanger, cold-producing medium can be suppressed to distribute gas, liquid lamination in passage, reduce the concussion of the degree of superheat, raising cold-producing medium changes the distributed uniform degree in core body each coolant channel inner at plate, thus the heat exchange property that raising plate changes.
Accompanying drawing explanation
Fig. 1 is the schematic perspective view of an embodiment of the utility model heat exchanger.
Fig. 2 is the first flow plate schematic diagram of heat exchanger shown in Fig. 1.
Fig. 3 is the second flow plate schematic diagram of heat exchanger shown in Fig. 1.
Fig. 4 is the first extension tube attached of heat exchanger shown in Fig. 1 and the structural representation stretching into pipe.
Fig. 5 is confined explosion's schematic diagram of heat exchanger shown in Fig. 1.
Fig. 6 is the cross-sectional schematic of heat exchanger shown in Fig. 1.
Detailed description of the invention
Utility model provides a kind of heat exchanger, by arranging short tube in plate type heat exchanger, cold-producing medium can be suppressed to distribute gas, liquid lamination in passage, reduce the concussion of the degree of superheat, raising cold-producing medium changes the distributed uniform degree in core body each coolant channel inner at plate, thus the heat exchange property that raising plate changes.
In this manual, by the length L that the distance definition between the center in the first aperture in flow plate and the center in the second aperture is heat exchange area in flow plate, by the width W that the distance definition between the center in the first aperture in flow plate and the center in the 4th aperture is heat exchange area in flow plate, be the thickness D of heat exchanger by the distance definition between two side plates on flow plate stacked direction.
Below in conjunction with accompanying drawing, detailed description of the invention of the present utility model is described.
Fig. 1 is the schematic perspective view of an embodiment of the utility model heat exchanger, as shown in Figure 1, in the present embodiment, heat exchanger comprises first-class circulation passage and the second circulation passage that several first flow plates 6 of spaced stacked setting and several the second flow plate 7, first flow plates 6 and the second flow plate 7 form spaced setting.Several the first flow plates 6 of spaced stacked setting and several second flow plates 7 are arranged alternately and the installation that cooperatively interacts is formed as heat exchange core body.
Fig. 2 and Fig. 3 shows the structural representation of each plate when closed assembly forms heat exchange core body, forms heat exchange core body at position closed assembly as shown in the figure.
As shown in the figure, first flow plate 6 comprises board plane and surrounds the turnup structure of board plane, four angles of board plane are respectively arranged with four apertures: the first aperture 62, aperture 61, second, the 3rd aperture 63 and the 4th aperture 64, turnup structure is provided with the first breach 65.Further, in order to increase the flow-disturbing performance of fluid in first-class circulation passage and second circulation passage, fin can be provided with on the board plane of the first flow plate 6, or on the first flow plate 6, be also provided with the concaveconvex structure protruding from board plane certain altitude, this concaveconvex structure can be herringbone corrugated, also can be dimple shape structure.
Second flow plate 7 comprises board plane and surrounds the turnup structure of board plane, four angles of board plane is respectively arranged with four apertures: the first aperture 74, aperture the 72, the 3 73 and the 4th, aperture 71, second, turnup structure is provided with the second breach 75.On heat exchange core, each first breach 65 is roughly located on a straight line, each second breach 75 is also roughly located on a straight line, each first breach 65 is positioned at left side or the right side of each second breach 75, first breach 65 and the second breach 75 are in setting of mutually staggering, can can tell the installation site of the first flow plate 6 and the second flow plate 7 like this from heat exchanger outside, also facilitate the installation of flow plate, prevent flow plate setup error.
Further, in order to increase the flow-disturbing performance of fluid in first-class circulation passage and second circulation passage, fin can be provided with on the board plane of the second flow plate 7, or on the second flow plate 7, be also provided with the concaveconvex structure protruding from board plane certain altitude, this concaveconvex structure can be herringbone corrugated, also can be dimple shape structure.
The first aperture 62, aperture 61, second on first flow plate 6, the 3rd aperture 63 and the 4th aperture 64 respectively with the first aperture 72, aperture 71, second on the second flow plate 7, the 3rd aperture 73 and the 4th corresponding setting in aperture 74.
Here should illustrate, the first flow plate 6 and the second flow plate 7 can be the flow plate of same shape and structure, and during closed assembly, the first flow plate 6 rotates 180 ° relative to the second flow plate 7 and carries out closed assembly.
The installation that cooperatively interacts of each first flow plate 6 and the second flow plate 7 is formed as heat exchange core body, the stacked formation in each aperture four distributes passage, be respectively each first aperture (61,71) first passage of stacked formation, each second aperture (62,72) second channel of stacked formation, each 3rd aperture (63,73) third channel of stacked formation and the four-way of Ge tetra-aperture (64,74) stacked formation.Wherein first passage and second channel are interconnected by first-class circulation passage, and third channel and four-way are interconnected by second circulation passage.Certainly, in other embodiments, also can be that first passage and third channel are interconnected, second channel and four-way are interconnected, or other combining form, the relation of distributing passage and circulation passage can be determined according to actual needs with flow plate structure, it is not limited here.
Heat exchanger also comprises the first extension tube attached 1 be communicated with first passage, the second extension tube attached 2 be communicated with second channel, the 3rd extension tube attached 3 be communicated with third channel and the 4th extension tube attached 4 be communicated with four-way, is positioned at the outer field side plate 5 of heat exchanger.First extension tube attached 1, second extension tube attached 2, the 3rd extension tube attached 3 and the 4th extension tube attached 4 can be fixed on side plate 5 by modes such as welding.And, first-class circulation passage is used for the circulation of cold-producing medium, second circulation passage is used for the circulation of cooling fluid, when heat exchanger uses as evaporimeter, first extension tube attached 1 is as inlet tube, owing to being gas-liquid two-phase cold-producing medium by the cold-producing medium in the first extension tube attached 1 inflow heat exchanger, so the bore of the first extension tube attached 1 can be less than the bore of other three extension tube attached.
As shown in Figure 4, a part for the second extension tube attached 2 stretches in second channel, and the second extension tube attached 2 comprises external pipeline section 21, assembly structure 22 and inside extending tube 23.The external diameter of assembly structure 22 is greater than the external diameter of external pipeline section 21 external diameter and inside extending tube 23, and the second extension tube attached 2 is welded and fixed by assembly structure 22 and side plate 5.And assembly structure 22 also for determining the position of inside extending tube 23 in second channel, has positioning action.Here it should be pointed out that and also can arrange separately an inside extending tube 23 in second channel, second channel is communicated with the second extension tube attached 2 by inside extending tube 23.
Certain gas-liquid lamination can be there is in gas-liquid two-phase cold-producing medium when the first extension tube attached 1 flows into first passage, and there is certain speed due to cold-producing medium, so easily cause at the side liquid refrigerant away from the first extension tube attached 1 of first passage more, side gaseous refrigerant near the first extension tube attached 1 is more, thus make cold-producing medium flow to the process of second channel from first passage, cold-producing medium and cooling fluid carry out heat exchange, when cold-producing medium enters second channel, easily occur that the more side of liquid refrigerant there will be cold-producing medium unsaturation, and the phenomenon of the more side refrigerant superheat of gaseous refrigerant.And on flow plate stacked direction, first extension tube attached 1 is separately positioned on the relative both sides of heat exchanger with the second extension tube attached 2, so on a second pass, there is the side of unsaturation cold-producing medium near the second extension tube attached 2, thus can cause the cold-producing medium flowed out from the second extension tube attached 2 containing liquid refrigerant, the concussion of system overheat degree or measurement section can be caused accurately, even can cause compressor liquid hammer.
As shown in Figure 5 and Figure 6, in the present embodiment, the external diameter of the inside extending tube 23 in the second extension tube attached 2 is less than the internal diameter of second channel, namely the external diameter of inside extending tube 23 is less than the internal diameter in the second aperture, inside extending tube 23 stretches in second channel, maintain a certain distance between the outer wall of inside extending tube 23 and the inwall of second channel, between the outer wall of inside extending tube 23 and the inwall of second channel, be formed as the circulation passage of cold-producing medium.And, the flowing space of the refrigerant circulation passage between the outer wall of inside extending tube 23 and the inwall of second channel is less relative to the flowing space of second channel, like this, although certain gas-liquid lamination can be there is in gas-liquid two-phase cold-producing medium when the first extension tube attached 1 flows into first passage, and there is certain speed due to cold-producing medium, so easily cause at the side liquid refrigerant away from the first extension tube attached 1 of first passage more, but flow to the process of second channel at cold-producing medium from first passage, because side that liquid refrigerant is more is subject to the obstruction of inside extending tube 23, thus reduce the refrigerant flow of the more side of liquid refrigerant, thus enable a part of liquid refrigerant flow to second channel from other position, realize cold-producing medium flow to the process of second channel from first passage can both be overheated, and, part of refrigerant needs first along the refrigerant circulation passage between the outer wall and the inwall of second channel of inside extending tube 23, flow to outside heat exchanger along inside extending tube 23 again, the existence of inside extending tube 23 can improve the irregularity of cold-producing medium in second channel, and the cold-producing medium flowing to second channel all needs to flow to outside heat exchanger by the import of inside extending tube 23, cold-producing medium can mix fully in the entry zone of inside extending tube 23, thus remaining liquid refrigerant and overheated gaseous refrigerant can be made to carry out heat exchange gasification, reduce the concussion of the degree of superheat, improve the heat exchange property of heat exchanger.
Further, on heat exchange core body, the length of inside extending tube 23 is h, and the length of second channel is that l, h and l meet: 0.1≤h/l≤0.6, now, can effectively reduce the concussion of the degree of superheat, improves the performance of heat exchanger.Further, h and l meets: 0.3≤h/l≤0.5.
Further, meet between the length L of heat exchanger heat exchange area and the thickness D of heat exchanger: 1≤L/D≤5.Like this, under identical heat exchange property, if the value of L/D is less, namely when the thickness of heat exchanger is larger, because first passage is longer, now easily there is gas-liquid separation phenomenon in cold-producing medium in first passage, thus it is uneven to cause cold-producing medium to distribute, the heat exchange property of heat exchanger is poor.And the present embodiment is by arranging the inside extending tube 23 with damping action, cold-producing medium generation gas-liquid separation phenomenon can be effectively reduced, thus relatively improve the heat exchange property of heat exchanger.
The above is only specific embodiment of the utility model, not does any pro forma restriction to the utility model.Although the utility model discloses as above with preferred embodiment, but and be not used to limit the utility model.Any those of ordinary skill in the art, do not departing under technical solutions of the utility model ambit, above-mentioned announcement technology contents all can be utilized to make many possible variations and modification to technical solutions of the utility model, or be revised as the Equivalent embodiments of equivalent variations.Therefore, every content not departing from technical solutions of the utility model, according to technical spirit of the present utility model to any simple modification made for any of the above embodiments, equivalent variations and modification, all still belongs in the scope of technical solutions of the utility model protection.
Claims (10)
1. a heat exchanger, comprise the first extension tube attached (1), the second extension tube attached (2), the 3rd extension tube attached (3), the 4th extension tube attached (4) and heat exchange core body, it is characterized in that, described heat exchange core body comprises multiple first flow plate (6) and multiple second flow plate (7) of stacked setting, adjacent described first flow plate (6) and the second flow plate (7) form first-class circulation passage or second circulation passage, described first-class circulation passage and the spaced setting of second circulation passage, described first flow plate (6) comprises the first aperture (61) and the second aperture (62), described second flow plate (7) comprises the first aperture (71) and the second aperture (72), each described first aperture (61, 71) stacked formation one first passage, each described second aperture (62, 72) stacked formation one second channel, described first passage is communicated with described first extension tube attached (1), described second channel is communicated with described second extension tube attached (2), described first passage is communicated with by described first-class circulation passage or second circulation passage with second channel,
Also be provided with an inside extending tube (23) in described second channel, described second channel is communicated with described second extension tube attached by described inside extending tube (23).
2. heat exchanger according to claim 1, it is characterized in that, described first passage is communicated with described first-class circulation passage, and described second extension tube attached (2) is communicated with described first extension tube attached (1) by described first-class circulation passage, described first passage; The external diameter of described inside extending tube (23) is less than the internal diameter of described second aperture (62,72), and described inside extending tube (23) does not contact with the periphery of described second channel; Meet between the length h of described inside extending tube (23) and the length l of second channel: 0.1≤h/l≤0.6.
3. heat exchanger according to claim 2, is characterized in that, meets: 0.3≤h/l≤0.5 between the length h of described inside extending tube (23) and the length l of second channel.
4. the heat exchanger according to any one of claims 1 to 3, it is characterized in that, described inside extending tube (23) and described second extension tube attached (2) are structure as a whole, and described second extension tube attached (2) comprises external pipeline section (21), assembly structure (22) and described inside extending tube (23); The external diameter of described assembly structure (22) is greater than the external diameter of described external pipeline section (21) external diameter and inside extending tube (23).
5. heat exchanger according to claim 4, it is characterized in that, on the stacked direction of described first flow plate (6) and the second flow plate (7), described first extension tube attached (1) and the second extension tube attached (2) are separately positioned on the relative both sides of described heat exchanger, and meet between the thickness D of the length L of the heat exchange area of described heat exchanger and described heat exchanger: 1≤L/D≤5.
6. heat exchanger according to claim 5, it is characterized in that, also be provided with side plate (5) in the outside of described heat exchange core body, described second extension tube attached (2) is welded and fixed by described assembly structure (22) and described side plate (5).
7. heat exchanger according to claim 6, it is characterized in that, described first flow plate (6) is provided with the first breach (65), described second flow plate (7) is provided with the second breach (75), each described first breach (65) is roughly positioned at a straight line, each described second breach (75) is also roughly positioned at a straight line, each described first breach (65) form straight line be positioned at each described second breach (75) organize straight left side or right side.
8. heat exchanger according to claim 7, it is characterized in that, the flow plate that described first flow plate (6) and the second flow plate (7) are same shape and structure, at described heat exchanger, described first flow plate (6) rotates 180 ° relative to the second flow plate (7).
9. the heat exchanger according to any one of claim 5 to 8, it is characterized in that, described heat exchanger is evaporimeter, described first-class circulation passage is used for the circulation of cold-producing medium, described first extension tube attached (1) is communicated with by described first-class circulation passage with described second extension tube attached (2), the import that described first extension tube attached (1) is cold-producing medium, the outlet that described second extension tube attached (2) is cold-producing medium.
10. heat exchanger according to claim 9, is characterized in that, the internal diameter of described first extension tube attached (1) is less than the internal diameter of described second extension tube attached (2), described first flow plate (6) also comprises the 3rd aperture (63) and the 4th aperture (64), described second flow plate (7) comprises the 3rd aperture (73) and the 4th aperture (74), 3rd aperture (63) of described first flow plate (6), 3rd aperture (73) stacked formation one third channel of described second flow plate (7), 4th aperture (64) of described first flow plate (6), 4th aperture (74) stacked formation one four-way of described second flow plate (7), third channel is communicated with by second circulation passage with four-way.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520499659.6U CN204806943U (en) | 2015-07-09 | 2015-07-09 | Heat exchanger |
| US14/835,237 US20160061531A1 (en) | 2014-08-27 | 2015-08-25 | Heat exchanger |
| EP15182352.3A EP2990749B1 (en) | 2014-08-27 | 2015-08-25 | Heat exchanger |
| US15/898,540 US10670348B2 (en) | 2014-08-27 | 2018-02-17 | Heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520499659.6U CN204806943U (en) | 2015-07-09 | 2015-07-09 | Heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204806943U true CN204806943U (en) | 2015-11-25 |
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ID=54591755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520499659.6U Active CN204806943U (en) | 2014-08-27 | 2015-07-09 | Heat exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204806943U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023876A (en) * | 2019-11-28 | 2020-04-17 | 铜陵同飞科技有限公司 | Plate type heat exchanger |
| CN112146483A (en) * | 2019-06-28 | 2020-12-29 | 浙江三花智能控制股份有限公司 | Plate heat exchanger |
-
2015
- 2015-07-09 CN CN201520499659.6U patent/CN204806943U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112146483A (en) * | 2019-06-28 | 2020-12-29 | 浙江三花智能控制股份有限公司 | Plate heat exchanger |
| CN111023876A (en) * | 2019-11-28 | 2020-04-17 | 铜陵同飞科技有限公司 | Plate type heat exchanger |
| CN111023876B (en) * | 2019-11-28 | 2021-03-19 | 铜陵同飞科技有限公司 | Plate type heat exchanger |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170401 Address after: 310018 Hangzhou economic and Technological Development Zone, Zhejiang, No. 21 Avenue, No. 60 Patentee after: Zhejiang Sanhua Automobile Components Co., Ltd. Address before: 310018 289-2, Hangzhou economic and Technological Development Zone, Zhejiang, No. 12 Patentee before: Hangzhou Sanhua Institute Co., Ltd. |
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| TR01 | Transfer of patent right |