Dual-purpose plate-fin heat exchanger

Abstract

The utility model discloses a dual-purpose plate-fin heat exchanger, which relates to the field of heat exchangers, aims to solve the problems that in the prior art, the refrigerant side and cooling liquid circulation sectional area is small, the weight is large, the flow resistance is large, and the system energy consumption is increased, and adopts the technical scheme that the dual-purpose plate-fin heat exchanger comprises a core body and a bracket, the top of the core body is provided with a second refrigerant connector, a first refrigerant connector, a cooling liquid inlet water pipe and a cooling liquid outlet water pipe. The core body comprises an upper side plate, a lower side plate and main plates, a plurality of groups of main plates are arranged between the upper side plate and the lower side plate, fins are further arranged between the adjacent main plates, and a refrigerant liquid inlet pipe is further arranged in the core body; a plate-fin structure is adopted, fin turbulent flow is increased, flow resistance is reduced, and heat exchange is improved; the refrigerant flow channel and the cooling liquid flow channel are arranged in the core body, and the flow path of the refrigerant flow channel is changed under the cooperation of the second main plate and the third main plate, so that the heat exchange efficiency between the refrigerant and the cooling liquid is improved, and meanwhile, the flow resistance is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heat exchangers, and particularly to a dual-purpose plate-fin heat exchanger. Background Technique

[0002] With the continuous progress of new energy vehicle technology, plate heat exchangers will also usher in technological iteration and upgrading. It is required that plate heat exchangers have the advantages of fast cooling speed, large specific heat capacity, high heat transfer coefficient, etc. With the application of new materials and the development of new structures, the performance of plate heat exchangers will be further improved, becoming more efficient and compact, meeting the higher requirements of new energy vehicles for the thermal management system.

[0003] At present, with the continuous increase in the refrigeration demand of new energy batteries and the energy-saving efficiency of the thermal management system, the original plate heat exchanger uses multiple main boards stacked and cross-exchanged heat. The refrigerant side and the coolant flow cross-sectional area are small, the weight is large, and the flow resistance is large, increasing the energy consumption of the system. Content of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a dual-purpose plate-fin heat exchanger, which can effectively solve the problems in the background technique.

[0005] In order to achieve the above purpose, the utility model discloses a dual-purpose plate-fin heat exchanger. The technical scheme adopted is that it includes a core body and a bracket. The core body is installed on the bracket, and a refrigerant second joint, a refrigerant first joint, a coolant inlet water pipe and a coolant outlet water pipe are arranged at the top of the core body;

[0006] A refrigerant outlet is arranged on the refrigerant second joint, and a refrigerant inlet is arranged on the refrigerant second joint through an extension pipe;

[0007] A refrigerant inlet and outlet are arranged on the refrigerant first joint;

[0008] The core body includes an upper side plate, a lower side plate and main boards. Multiple groups of main boards are arranged between the upper side plate and the lower side plate. Fins are also arranged between adjacent main boards. A refrigerant pipe adapted to the refrigerant second joint is also arranged in the core body; adopting a plate-fin structure, increasing fin turbulence, reducing flow resistance and improving heat transfer;

[0009] The main boards include a first main board, a second main board and a third main board. Multiple groups of the first main boards are arranged. The second main board and the third main board are interspersed between multiple groups of the first main boards to change the flow path of the refrigerant in the core body. By setting a refrigerant flow path and a coolant flow path in the core body, and with the cooperation of the second main board and the third main board, the flow path of the refrigerant flow path is changed, improving the heat transfer efficiency between the refrigerant and the coolant, and at the same time reducing the flow resistance.

[0010] As a preferred technical solution of the present utility model, the second refrigerant joint and the first refrigerant joint are located on the same side.

[0011] As a preferred technical solution of the present utility model, a temperature sensor is provided on the second refrigerant joint, and an electronic expansion valve is provided on the extension pipe.

[0012] As a preferred technical solution of the present utility model, a shock-absorbing pad for absorbing vibration is further provided on the bracket.

[0013] As a preferred technical solution of the present utility model, the refrigerant flow channels in the core body include a first refrigerant flow channel, a second refrigerant flow channel, and a third refrigerant flow channel. The ratio of the number of flow channels of the three refrigerant flows is 1:2:5. The refrigerant side adopts multiple flows, with uniform flow distribution. The flow channels decrease from more to less, and there is a subcooling section. Using multiple flows or a single flow as a battery cooler takes into account both performance and flow resistance, meeting the diverse needs of customers.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: By arranging a refrigerant flow channel and a coolant flow channel in the core body and with the cooperation of the second main board and the third main board, the present utility model changes the flow process of the refrigerant flow channel, improves the heat exchange efficiency between the refrigerant and the coolant, and reduces the flow resistance at the same time.

[0015] In the present utility model, the flow channels inside the core body adopt a plate-fin structure, which increases fin turbulence, reduces flow resistance, and improves heat exchange; the refrigerant side adopts multiple flows, with uniform flow distribution. The flow channels decrease from more to less, and there is a subcooling section. Using multiple flows or a single flow as a battery cooler takes into account both performance and flow resistance, meeting the diverse needs of customers; the coolant side adopts an internal fin structure, which increases the heat exchange area, improves the heat exchange efficiency, and reduces the flow resistance; adopting a plate-fin structure, it is lightweight and can improve the overall energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Structural schematic of the present utility model Figure 1 ;

[0017] Figure 2 Structural schematic of the present utility model Figure 2 ;

[0018] Figure 3 Cross-sectional view of the core body of the present utility model;

[0019] Figure 4 Schematic diagram of the fin structure of the present utility model;

[0020] Figure 5 Enlarged view of part A of the present utility model;

[0021] Figure 6 Enlarged view of part B of the present utility model;

[0022] Figure 7 This is a schematic diagram of the flow channels of the refrigerant and coolant in the core of the present utility model.

[0023] In the figure: 1, core; 2, second refrigerant joint; 3, first refrigerant joint; 4, coolant inlet water pipe; 5, coolant outlet water pipe; 6, temperature sensor; 7, electronic expansion valve; 8, refrigerant outlet; 9, refrigerant inlet; 10, bracket; 11, shock pad; 12, upper side plate; 13, lower side plate; 14, refrigerant pipe; 15, first main board; 16, second main board; 17, third main board; 18, fin; 19, extension pipe; 20, refrigerant inlet and outlet. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. Embodiment 1

[0025] As Figures 1 to 7 shown, the present utility model discloses a dual-purpose plate-fin heat exchanger, and the technical solution adopted is that it includes a core 1 and a bracket 10. The core 1 is installed on the bracket 10, and a shock pad 11 for absorbing vibration is further provided on the bracket 10.

[0026] The top of the core 1 is provided with a second refrigerant joint 2, a first refrigerant joint 3, a coolant inlet water pipe 4, and a coolant outlet water pipe 5;

[0027] A refrigerant inlet and outlet 20 is provided on the first refrigerant joint 3; when used as a battery cooler, the refrigerant inlet and outlet 20 serves as the refrigerant outlet, and when used as a water-cooled condenser, the refrigerant inlet and outlet 20 serves as the refrigerant inlet;

[0028] The second refrigerant joint 2 and the first refrigerant joint 3 are located on the same side.

[0029] A refrigerant outlet 8 is provided on the second refrigerant joint 2, and a refrigerant inlet 9 is provided on the second refrigerant joint 2 through an extension pipe 19; a temperature sensor 6 is provided on the second refrigerant joint 2, and an electronic expansion valve 7 is provided on the extension pipe 19.

[0030] The core 1 includes an upper side plate 12, a lower side plate 13, and main boards. A plurality of groups of the main boards are provided between the upper side plate 12 and the lower side plate 13, fins 18 are further provided between adjacent main boards, and a refrigerant pipe 14 adapted to the second refrigerant joint 2 is further provided in the core 1;

[0031] The main board includes a first main board 15, a second main board 16 and a third main board 17. There are multiple groups of the first main board 15, and the second main board 16 and the third main board 17 are interspersed between multiple groups of the first main board 15 to change the flow path of the refrigerant in the core 1.

[0032] The refrigerant flow channels in the core 1 include a first refrigerant flow channel, a second refrigerant flow channel and a third refrigerant flow channel, and the ratio of the number of flow channels of the three refrigerant flow paths is 1:2:5.

[0033] Working process description when used as a battery cooler:

[0034] Number of parts:

[0035] There are 10 - 50 pieces of the first main board 15, 1 piece each of the second main board 16, the third main board 17, the upper side plate 12, and the lower side plate 13. The number of fins 18 is: the first main board 15 + the second main board 16 + the third main board 17 + 1 piece;

[0036] Assembly and welding method of the core 1:

[0037] The upper side plate 12 is provided with a second refrigerant joint 2, a first refrigerant joint 3, a coolant inlet water pipe 4 and a coolant outlet water pipe 5. Then, in sequence downward are the fins 18, the first main board 15, the fins 18, the first main board 15, the fins 18,..., the fins 18, the third main board 17, the fins 18, the first main board 15, the fins 18, the first main board 15, the fins 18,..., the fins 18, the second main board 16, the fins 18, the first main board 15, the fins 18, the first main board 15, the fins 18,..., the fins 18, the lower side plate 13, and the bracket 10. After the core 1 is laminated in the above order, it is sent into a tunnel furnace for brazing. After the brazing of the core 1 is completed, the electronic expansion valve 7 and the temperature sensor 6 are assembled.

[0038] Both the coolant and the refrigerant flow through the fins 18, and each layer of fins 18 is a flow channel.

[0039] Coolant flow channel: As Figure 7 the flow path marked by the green arrow in the figure, which is a single flow path. The 2nd, 4th, 6th, 8th, 10th,..., 2nth layers of fins 18 are coolant flow channels.

[0040] Refrigerant flow channel: As Figure 7 the flow path marked by the red arrow in the figure. The 1st, 3rd, 5th, 7th, 9th,..., 2n + 1th layers of fins 18 are refrigerant flow channels. The refrigerant flow channels are divided into three flow paths in total, and the ratio of the number of flow channels of the first, second, and third refrigerant flow paths is 1:2:5. The refrigerant is introduced through the refrigerant inlet 9, flows into the first refrigerant flow path through the refrigerant pipe 14, and then flows through the second and third refrigerant flow paths in sequence, and is discharged from the refrigerant inlet and outlet 20 at the first refrigerant joint 3.

[0041] Working process description when used as a water-cooled condenser:

[0042] Number of parts:

[0043] The assembly welding method, etc. is the same as when used as a battery cooler.

[0044] Coolant flow channel:

[0045] The positions of the coolant inlet and outlet are swapped compared to when used as a battery cooler, and the rest are the same.

[0046] Refrigerant flow channel:

[0047] The refrigerant inlet and outlet 20 on the first refrigerant joint 3 is the refrigerant inlet, and the refrigerant outlet 8 on the second refrigerant joint 2 is the refrigerant outlet. The third, second, and first processes of the battery cooler are respectively the first, second, and third processes of the water-cooled condenser, and the ratio of the number of flow channels in the processes is 5:2:1.

[0048] Working principle of the present utility model:

[0049] The working mode of this device when used as a battery cooler is as follows:

[0050] Refrigerant flow channel:

[0051] The refrigerant medium enters through the refrigerant inlet 9, flows through three refrigerant processes, and is discharged from the first refrigerant joint 3 for heat exchange;

[0052] Coolant flow channel:

[0053] The coolant medium enters through the coolant inlet water pipe 4, flows through a single process, and exits from the coolant outlet water pipe 5 for heat exchange;

[0054] The function is to cool the high-temperature coolant on the coolant side with the low-temperature refrigerant on the refrigerant side for cooling the battery pack;

[0055] The working mode of the plate heat exchanger when used as a water-cooled condenser is as follows:

[0056] Refrigerant flow channel:

[0057] The refrigerant medium enters through the refrigerant inlet and outlet 20, flows through three refrigerant processes, and is discharged from the refrigerant outlet 8 for heat exchange;

[0058] Coolant flow channel:

[0059] The coolant medium enters through the coolant inlet water pipe 4, flows through a single process, and exits from the coolant outlet water pipe 5 for heat exchange;

[0060] The function is to heat the low-temperature coolant on the coolant side with the high-temperature refrigerant on the refrigerant side for heating the passenger compartment.

[0061] The circuits and mechanical connections involved in the present utility model are conventional means adopted by those skilled in the art and can obtain technical inspiration through a limited number of tests, belonging to common general knowledge.

[0062] The components not described in detail in this article are prior art.

[0063] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A dual-purpose plate-fin heat exchanger, characterized in that: It includes a core body (1) and a bracket (10). The core body (1) is installed on the bracket (10), and a second refrigerant joint (2), a first refrigerant joint (3), a coolant inlet water pipe (4), and a coolant outlet water pipe (5) are provided at the top of the core body (1). A refrigerant outlet (8) is provided on the second refrigerant joint (2), and a refrigerant inlet (9) is provided on the second refrigerant joint (2) through an extension pipe (19). The refrigerant inlet and outlet (20) is provided on the first refrigerant joint (3). The core body (1) includes an upper side plate (12), a lower side plate (13), and a main board. A plurality of groups of the main boards are provided between the upper side plate (12) and the lower side plate (13). Fins (18) are further provided between adjacent main boards. A refrigerant pipe (14) adapted to the second refrigerant joint (2) is further provided in the core body (1). The main board includes a first main board (15), a second main board (16), and a third main board (17). A plurality of groups of the first main boards (15) are provided. The second main board (16) and the third main board (17) are interspersed between the plurality of groups of the first main boards (15) to change the flow path of the refrigerant in the core body (1).

2. The dual-purpose plate-fin heat exchanger according to claim 1, wherein: The second refrigerant joint (2) and the first refrigerant joint (3) are located on the same side.

3. The dual-purpose plate-fin heat exchanger according to claim 1, characterized in that: A temperature sensor (6) is provided on the second refrigerant joint (2), and an electronic expansion valve (7) is provided on the extension pipe (19).

4. The dual-purpose plate-fin heat exchanger according to claim 1, wherein: A shock pad (11) for absorbing vibration is further provided on the bracket (10).

5. A dual-purpose plate-fin heat exchanger according to claim 1, wherein: The refrigerant flow path in the core body (1) includes a first refrigerant flow path, a second refrigerant flow path, and a third refrigerant flow path. The ratio of the number of flow paths of the three refrigerant flow paths is 1:2:5.

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