CN110986643A - Application of capillary heat exchanger in air source heat pump system - Google Patents
Application of capillary heat exchanger in air source heat pump system Download PDFInfo
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- CN110986643A CN110986643A CN201911247605.XA CN201911247605A CN110986643A CN 110986643 A CN110986643 A CN 110986643A CN 201911247605 A CN201911247605 A CN 201911247605A CN 110986643 A CN110986643 A CN 110986643A
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- plate
- capillary
- heat exchanger
- mounting
- heat exchange
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/04—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure
- F28D15/046—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes with tubes having a capillary structure characterised by the material or the construction of the capillary structure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
- F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
Abstract
The invention discloses an application of a capillary heat exchanger in an air source heat pump system, which comprises a bottom plate, a first side plate and a second side plate, wherein two sides of the top of the bottom plate are respectively and fixedly connected with the bottoms of the first side plate and the second side plate. This capillary heat exchanger application in air source heat pump system, top and bottom difference swing joint between the relative one side of first curb plate and second curb plate have first baffle and second baffle, the equal swing joint in front between the relative one side of first curb plate and second curb plate has the installation piece, the fin radiating mode of traditional gilled tube formula heat exchanger has been changed, change to carry out the heat with the capillary and give off to the heat exchange pipe, utilize the capillary network of capillary constitution to dispel the heat on the one hand, can improve the heat exchange efficiency of heat exchanger effectively, on the other hand uses the capillary can reduce the holistic volume of heat exchanger effectively, reduce the volume that occupies of heat exchanger installation.
Description
Technical Field
The invention relates to the technical field of capillary heat exchangers, in particular to an application of a capillary heat exchanger in an air source heat pump system.
Background
The heat exchanger is an equipment for transferring partial heat of hot fluid to cold fluid, also called heat exchanger, the heat exchanger plays an important role in chemical industry, petroleum, power, food and other industrial production, the heat exchanger can be used as heater, cooler, condenser, evaporator and reboiler, etc. in chemical industry production, the heat exchanger is widely used, the heat exchanger is an energy-saving equipment for transferring heat between materials between two or more than two fluids with different temperatures, the heat is transferred to the fluid with lower temperature from the fluid with higher temperature, the temperature of the fluid reaches the index specified by the process to meet the requirement of process condition, and is one of main equipments for improving energy utilization rate, the dividing wall type heat exchanger is one of two fluids with different temperatures flowing in the space separated by the wall surface, the heat is transferred through the wall surface and the fluid convects on the wall surface to exchange heat between the two fluids, the dividing wall type heat exchanger includes shell-and-tube type, double-tube type and other types of heat exchangers, and the dividing wall type heat exchanger is the most widely used heat exchanger at present.
The traditional tube-fin heat exchanger comprises heat exchange tubes, fins and collecting pipes arranged at two ends of the heat exchange tubes, wherein a plurality of heat exchange tubes are arranged in parallel, two ends of each heat exchange tube are respectively connected to the collecting pipes at two ends, the heat exchange tubes are arranged on the fins in a penetrating way, the heat dissipation area is increased through the fins, and the heat exchange efficiency of the tube-fin heat exchanger is improved, but the heat exchange tubes of the tube-fin heat exchanger have larger tube diameters, high cost and large occupied volume, and the refrigerant in the middle of the heat exchange tubes of the tube-fin heat exchanger is far away from the edges of the heat exchange tubes, so that the heat exchange efficiency of the tube-fin heat exchanger can not be influenced, if the diameters of the heat exchange tubes are reduced, when the heat exchange tubes and the fins are installed, the tube penetrating and expanding operations are needed, the, therefore, the pipe diameter of the heat exchange pipe can only be kept at a larger pipe diameter, the problem that the heat exchange efficiency of the existing tube-fin heat exchanger is lower cannot be solved, and the utilization rate of a refrigerant is reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the application of the capillary tube heat exchanger in the air source heat pump system, and solves the problems of high cost, large occupied volume, low heat exchange efficiency and inconvenient installation of the traditional tube-fin heat exchanger.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: an application of a capillary tube heat exchanger in an air source heat pump system comprises a bottom plate, a first side plate and a second side plate, wherein two sides of the top of the bottom plate are fixedly connected with the bottoms of the first side plate and the second side plate respectively, the top and the bottom between opposite sides of the first side plate and the second side plate are respectively and movably connected with a first baffle plate and a second baffle plate, the front between opposite sides of the first side plate and the second side plate is respectively and movably connected with an installation block, a capillary tube is arranged between opposite sides of the two installation blocks, the bottom at the left side of the first side plate is fixedly connected with a water inlet pipe, the top at the right side of the second side plate is fixedly connected with a water outlet pipe, a U-shaped heat exchange pipe is arranged between opposite sides of the first side plate and the second side plate, two ends of the U-shaped heat exchange pipe are respectively and fixedly connected, the back fixedly connected with backplate of first baffle and second baffle to the front fixedly connected with mounting panel of backplate, the front of mounting panel seted up with the first mounting groove of U type heat exchange tube looks adaptation to the surface of U type heat exchange tube contacts with the inner wall of first mounting groove, the second mounting groove with U type heat exchange tube looks adaptation is all seted up to one side that first curb plate is relative with the second curb plate to the surface of U type heat exchange tube contacts with the inner wall of second mounting groove.
Preferably, the front and the back of the two sides of the first baffle plate and the second baffle plate are fixedly connected with connecting blocks, the top and the bottom of the first side plate and the second side plate are provided with third mounting grooves matched with the connecting blocks, and one side of each connecting block is fixedly connected with the inner wall of each third mounting groove through connecting bolts.
Preferably, the bottom of one side of the first side plate and the top of one side of the second side plate are both provided with through holes matched with the U-shaped heat exchange tubes, and the surfaces of the U-shaped heat exchange tubes are in contact with the inner walls of the through holes.
Preferably, a fourth mounting groove matched with the mounting block is formed in one side, opposite to the first side plate and the second side plate, of the first side plate, transition fit is adopted between the surface of the mounting block and the inner wall of the fourth mounting groove, and the top end and the bottom end of the fourth mounting groove are communicated with the inside of the two third mounting grooves respectively.
Preferably, one side of the mounting block is provided with a mounting hole matched with the capillary tube, the mounting holes are positioned at equal intervals of the mounting block and are provided with a plurality of groups, and one end of the capillary tube is in transition fit with the inner wall of the mounting hole.
Preferably, the inside of backplate has seted up first installation bolt hole to first installation bolt hole is located the inside of backplate and has seted up six groups.
Preferably, the connecting block and the inside of third mounting groove all offer with the second mounting bolt hole of connecting bolt looks adaptation.
Preferably, the thickness of the back plate is 3cm, the thickness of the mounting plate is 2cm, and the material of the capillary tube is 321 stainless steel component.
(III) advantageous effects
The invention provides an application of a capillary heat exchanger in an air source heat pump system. Compared with the prior art, the method has the following beneficial effects:
(1) this capillary heat exchanger application in air source heat pump system, top and bottom between the relative one side of first curb plate and second curb plate have first baffle and second baffle through swing joint respectively, the equal swing joint in front between the relative one side of first curb plate and second curb plate has the installation piece, and be provided with the capillary between the relative one side of two installation pieces, the fin heat dissipation mode of traditional gilled tube formula heat exchanger has been changed, change to carry out the heat with the capillary and give off to the heat exchange pipe, utilize the capillary network of capillary constitution to dispel the heat on the one hand, can improve the heat exchange efficiency of heat exchanger effectively, on the other hand uses the capillary can reduce the holistic volume of heat exchanger effectively, reduce the volume that occupies of heat exchanger installation.
(2) This capillary heat exchanger application in air source heat pump system, through the left bottom fixedly connected with inlet tube of first curb plate, and the top fixedly connected with outlet pipe on second curb plate right side, be provided with U type heat exchange tube between the relative one side of first curb plate and second curb plate, and the equal fixedly connected with threaded connection head in both ends of U type heat exchange tube, the one end of two threaded connection heads respectively with the inside threaded connection of inlet tube and outlet pipe, adopt U type heat exchange tube can reduce the volume of heat exchanger effectively, make the heat exchanger required mounting area when using in air source heat pump system littleer, make things convenient for the installation of heat exchanger.
(3) This capillary heat exchanger application in air source heat pump system, back fixedly connected with backplate through first baffle and second baffle, and the positive fixedly connected with mounting panel of backplate, the front of mounting panel seted up with the first mounting groove of U type heat exchange tube looks adaptation, and the surface of U type heat exchange tube contacts with the inner wall of first mounting groove, the second mounting groove with U type heat exchange tube looks adaptation is all seted up to one side that first curb plate is relative with the second curb plate, and the surface of U type heat exchange tube contacts with the inner wall of second mounting groove, the mounting panel is equipped with in the front of backplate to the adoption, and set up the first mounting groove with U type heat exchange tube looks adaptation in the inside of mounting panel, can play the guard action to U type heat exchange tube effectively, improve the life of heat exchange tube in the heat exchanger.
Drawings
FIG. 1 is a perspective view of a capillary tube heat exchanger construction of the present invention;
FIG. 2 is a perspective view of the internal structure of the capillary tube heat exchanger of the present invention;
FIG. 3 is a perspective view of a U-shaped heat exchange tube structure according to the present invention;
FIG. 4 is a perspective view of the back plate and the first baffle structure of the present invention;
FIG. 5 is a perspective view of a first side panel structure of the present invention;
FIG. 6 is a perspective view of the mounting block structure of the present invention;
FIG. 7 is a perspective view of the back plate and the mounting plate structure of the present invention.
In the figure, 1-bottom plate, 2-first side plate, 3-second side plate, 4-first baffle, 5-second baffle, 6-installation block, 7-capillary tube, 8-water inlet tube, 9-water outlet tube, 10-U-shaped heat exchange tube, 11-threaded connector, 12-back plate, 13-installation plate, 14-first installation groove, 15-second installation groove, 16-connecting block, 17-third installation groove, 18-connecting bolt, 19-through hole, 20-fourth installation groove, 21-installation hole, 22-first installation bolt hole, and 23-second installation bolt hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-7, an embodiment of the present invention provides a technical solution: an application of a capillary heat exchanger in an air source heat pump system comprises a bottom plate 1, a first side plate 2 and a second side plate 3, wherein through holes 19 matched with U-shaped heat exchange tubes 10 are formed in the bottom of one side of the first side plate 2 and the top of one side of the second side plate 3, the surfaces of the U-shaped heat exchange tubes 10 are contacted with the inner walls of the through holes 19, fourth mounting grooves 20 matched with mounting blocks 6 are formed in the opposite sides of the first side plate 2 and the second side plate 3, the surfaces of the mounting blocks 6 and the inner walls of the fourth mounting grooves 20 are in transition fit, the top ends and the bottom ends of the fourth mounting grooves 20 are respectively communicated with the interiors of two third mounting grooves 17, the two sides of the top of the bottom plate 1 are fixedly connected with the bottoms of the first side plate 2 and the second side plate 3 respectively, and the top and the bottom between the opposite sides of the first side plate 2 and the second side plate 3 are respectively and movably, the insides of the first baffle plate 4 and the second baffle plate 5 are respectively provided with a second mounting bolt hole 22, the front and the back of the two sides of the first baffle plate 4 and the second baffle plate 5 are respectively fixedly connected with a connecting block 16, the insides of the connecting block 16 and the third mounting groove 17 are respectively provided with a second mounting bolt hole 23 matched with a connecting bolt 18, the tops and the bottoms of the first side plate 2 and the second side plate 3 are respectively provided with a third mounting groove 17 matched with the connecting block 16, one side of the connecting block 16 is fixedly connected with the inner wall of the third mounting groove 17 through the connecting bolt 18, the front between the opposite sides of the first side plate 2 and the second side plate 3 is respectively movably connected with a mounting block 6, one side of the mounting block 6 is provided with a mounting hole 21 matched with a capillary tube 7, the mounting holes 21 are positioned at equal intervals of the mounting block 6 and are provided with a plurality of groups, and one end of the capillary, a capillary tube 7 is arranged between the opposite sides of the two mounting blocks 6, a water inlet pipe 8 is fixedly connected to the bottom of the left side of the first side plate 2, a water outlet pipe 9 is fixedly connected to the top of the right side of the second side plate 3, a U-shaped heat exchange pipe 10 is arranged between the opposite sides of the first side plate 2 and the second side plate 3, two ends of the U-shaped heat exchange pipe 10 are fixedly connected with threaded connectors 11, one ends of the two threaded connectors 11 are respectively in threaded connection with the inner parts of the water inlet pipe 8 and the water outlet pipe 9, back plates 12 are fixedly connected to the back surfaces of the first baffle plate 4 and the second baffle plate 5, the thickness of the back plate 12 is 3cm, the thickness of the mounting plate 13 is 2cm, the capillary tube 7 is made of 321 stainless steel components, first mounting bolt holes 22 are formed in the back plate 12, six groups of the first mounting bolt holes 22 are, the front surface of the mounting plate 13 is provided with a first mounting groove 14 adapted to the U-shaped heat exchange tube 10, the surface of the U-shaped heat exchange tube 10 contacts with the inner wall of the first mounting groove 14, one side of the first side plate 2 opposite to the second side plate 3 is provided with a second mounting groove 15 adapted to the U-shaped heat exchange tube 10, and the surface of the U-shaped heat exchange tube 10 contacts with the inner wall of the second mounting groove 15, while the contents not described in detail in the present specification belong to the prior art known to those skilled in the art.
When in use, the second baffle 5 is arranged at the bottom of the first side plate 2 and the second side plate 3, the bottom of the back plate 12 and the second baffle 5 are fixedly arranged by using a fixing bolt, the U-shaped heat exchange tube 10 is arranged in the first installation groove 14 in the installation plate 13 and is respectively connected with the water inlet tube 8 and the water outlet tube 9 through the threaded connectors 11 at two ends of the U-shaped heat exchange tube 10, then a plurality of groups of capillaries 7 are arranged in the installation holes 21 in the two installation blocks 6, then the two installation blocks 6 are inserted into the fourth installation groove 20 from the inside of the third installation groove 17 until the bottom ends of the two installation blocks 6 are contacted with the connecting block 16 at the bottom, the connecting blocks 16 at two sides of the first baffle 4 are arranged in the third installation groove 17, the connecting block 16 is fixedly connected with the inside of the third installation groove 17 by using the connecting bolt 18, and the assembly of the capillary heat exchanger is, and finally, integrally installing the capillary heat exchanger in the air source heat pump system.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. The utility model provides an application of capillary heat exchanger in air source heat pump system, includes bottom plate (1), first curb plate (2) and second curb plate (3), the both sides at bottom plate (1) top respectively with the bottom fixed connection of first curb plate (2) and second curb plate (3), its characterized in that: the heat exchanger is characterized in that the top and the bottom between the opposite sides of the first side plate (2) and the second side plate (3) are respectively and movably connected with a first baffle (4) and a second baffle (5), the front between the opposite sides of the first side plate (2) and the second side plate (3) is respectively and movably connected with an installation block (6), a capillary tube (7) is arranged between the opposite sides of the two installation blocks (6), the left bottom of the first side plate (2) is fixedly connected with a water inlet tube (8), the right top of the second side plate (3) is fixedly connected with a water outlet tube (9), a U-shaped heat exchange tube (10) is arranged between the opposite sides of the first side plate (2) and the second side plate (3), both ends of the U-shaped heat exchange tube (10) are respectively and fixedly connected with threaded connectors (11), and one end of each of the two threaded connectors (11) is respectively in threaded, the back fixedly connected with backplate (12) of first baffle (4) and second baffle (5) to the front fixedly connected with mounting panel (13) of backplate (12), the front of mounting panel (13) seted up with the first mounting groove (14) of U type heat exchange tube (10) looks adaptation, and the surface of U type heat exchange tube (10) contacts with the inner wall of first mounting groove (14), second mounting groove (15) with U type heat exchange tube (10) looks adaptation are all seted up to one side that first curb plate (2) are relative with second curb plate (3) to the surface of U type heat exchange tube (10) contacts with the inner wall of second mounting groove (15).
2. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: the front and the back of first baffle (4) and second baffle (5) both sides all fixedly connected with connecting block (16), third mounting groove (17) with connecting block (16) looks adaptation are all seted up to the top and the bottom of first curb plate (2) and second curb plate (3) to pass through connecting bolt (18) fixed connection between the inner wall of one side of connecting block (16) and third mounting groove (17).
3. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: the bottom of first curb plate (2) one side and the top of second curb plate (3) one side all seted up through-hole (19) with U type heat exchange tube (10) looks adaptation to the surface of U type heat exchange tube (10) contacts with the inner wall of through-hole (19).
4. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: fourth mounting groove (20) with installation piece (6) looks adaptation are all seted up to one side that first curb plate (2) are relative with second curb plate (3) to adopt transition fit between the surface of installation piece (6) and the inner wall of fourth mounting groove (20), the top and the bottom of fourth mounting groove (20) communicate with the inside of two third mounting grooves (17) respectively.
5. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: the mounting structure is characterized in that a mounting hole (21) matched with the capillary tube (7) is formed in one side of the mounting block (6), a plurality of groups of mounting holes (21) are formed in the mounting block (6) at equal intervals, and one end of the capillary tube (7) is in transition fit with the inner wall of the mounting hole (21).
6. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: a first mounting bolt hole (22) is formed in the back plate (12), and six groups of the first mounting bolt holes (22) are formed in the back plate (12).
7. Use of a capillary heat exchanger according to claim 2 in an air-source heat pump system, characterized in that: and a second mounting bolt hole (23) matched with the connecting bolt (18) is formed in the connecting block (16) and the third mounting groove (17).
8. Use of a capillary heat exchanger according to claim 1 in an air-source heat pump system, characterized in that: the thickness of the back plate (12) is 3cm, the thickness of the mounting plate (13) is 2cm, and the material of the capillary tube (7) adopts a 321 stainless steel component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911247605.XA CN110986643A (en) | 2019-12-09 | 2019-12-09 | Application of capillary heat exchanger in air source heat pump system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911247605.XA CN110986643A (en) | 2019-12-09 | 2019-12-09 | Application of capillary heat exchanger in air source heat pump system |
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| Publication Number | Publication Date |
|---|---|
| CN110986643A true CN110986643A (en) | 2020-04-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911247605.XA Pending CN110986643A (en) | 2019-12-09 | 2019-12-09 | Application of capillary heat exchanger in air source heat pump system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115790244A (en) * | 2022-11-20 | 2023-03-14 | 佛山市依恳丰机电设备有限公司 | Fin heat exchanger convenient to equipment |
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| JP2001056165A (en) * | 1999-08-16 | 2001-02-27 | Mitsubishi Heavy Ind Ltd | Heat exchanger for evaporator of air conditioner |
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| CN201876010U (en) * | 2010-11-29 | 2011-06-22 | 石程林 | Air source heat pump and heat supply system |
| CN105972725A (en) * | 2016-03-25 | 2016-09-28 | 安徽建筑大学 | Capillary tube air conditioning system |
| CN207556026U (en) * | 2017-10-18 | 2018-06-29 | 新昌县回山镇启迪五金经营部 | A kind of energy saving evaporator fin of Double-piece type |
| CN208332758U (en) * | 2018-06-08 | 2019-01-04 | 长虹美菱股份有限公司 | A kind of push-in type oval tube fin evaporator of wind cooling refrigerator |
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2019
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH112474A (en) * | 1997-06-11 | 1999-01-06 | Toshiba Corp | Cooling device |
| JP2001056165A (en) * | 1999-08-16 | 2001-02-27 | Mitsubishi Heavy Ind Ltd | Heat exchanger for evaporator of air conditioner |
| CN201827982U (en) * | 2010-09-28 | 2011-05-11 | 际高建业有限公司 | Capillary tube plane radiation type air-conditioning tail end with high heat conduction coefficient |
| CN201876010U (en) * | 2010-11-29 | 2011-06-22 | 石程林 | Air source heat pump and heat supply system |
| CN105972725A (en) * | 2016-03-25 | 2016-09-28 | 安徽建筑大学 | Capillary tube air conditioning system |
| CN207556026U (en) * | 2017-10-18 | 2018-06-29 | 新昌县回山镇启迪五金经营部 | A kind of energy saving evaporator fin of Double-piece type |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115790244A (en) * | 2022-11-20 | 2023-03-14 | 佛山市依恳丰机电设备有限公司 | Fin heat exchanger convenient to equipment |
| CN115790244B (en) * | 2022-11-20 | 2023-08-29 | 佛山市依恳丰机电设备有限公司 | Fin heat exchanger convenient to equipment |
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Application publication date: 20200410 |
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