Heat exchange system and energy storage unit

Abstract

The utility model provides a heat exchange system and an energy storage unit, the heat exchange system comprises a first loop, a second loop and a refrigerating loop, the first loop comprises a first branch and a first heat exchanger arranged on the first branch, the first branch is used for being connected with first equipment, and the second loop is used for being connected with second equipment; comprising a second branch and a third branch which are connected in parallel, the second branch is provided with a dry cooler, and the third branch is provided with a second heat exchanger. The first heat exchanger and the second heat exchanger are connected with the air suction side of the compressor. The working medium of the refrigerating circuit can exchange heat with the working medium of the first device and the working medium of the second device in the first heat exchanger and the second heat exchanger respectively. By means of the design, the heat exchange system can conduct heat exchange on the first device and the second device at the same time, the dry cooler and the second heat exchanger are connected in parallel so that the flow resistance of the second loop can be reduced, the dry cooler and the second heat exchanger can be selected according to needs, heat exchange efficiency can be improved, and consumption is reduced.

Description

Technical Field

[0001] This application relates to the field of heat exchange, and more particularly to a heat exchange system and energy storage unit. Background Technology

[0002] Energy storage units typically consist of energy storage cells and power devices, such as energy storage converters. During operation, a heat exchange system is used to manage the operating temperatures of the energy storage cells and the energy storage converter via heat pipes. With technological advancements, the charging and discharging power of energy storage units is increasing, leading to a continuous increase in the heat generation of the energy storage converter. This results in increasingly stringent requirements for the efficiency of the heat exchange system. For power devices, such as the energy storage converter, a circulating liquid cooling system is used, supplemented by an air cooler for heat dissipation. In related technologies, to further improve the heat dissipation efficiency of the power devices, a plate heat exchanger is connected in series in the liquid cooling loop. This plate heat exchanger is connected to the compression refrigeration loop, providing supplemental cooling to the liquid cooling loop. However, this approach significantly increases the flow resistance of the air cooler and plate heat exchanger in the loop, which is detrimental to system operation. Summary of the Invention

[0003] This application relates to a heat exchange system and an energy storage unit, which are used to improve the heat exchange efficiency of the heat exchange system.

[0004] This application provides a heat exchange system including a first loop and a second loop. The first loop includes a first branch and a first heat exchanger. The first branch is used to connect to a first device, and the first heat exchanger is disposed on the first branch. The second loop includes a second branch and a third branch, which are connected in parallel. The second loop is used to connect to a second device. The second branch is provided with a dry cooler, and the third branch is provided with a second heat exchanger. The heat exchange system also includes a refrigeration loop, which includes a compressor. The first heat exchanger and the second heat exchanger are connected to the suction side of the compressor.

[0005] By setting up a first loop, a second loop, and a refrigeration loop, the heat exchange system can simultaneously exchange heat with both the first and second devices, thereby improving the heat exchange efficiency of the system. The dry cooler and the second heat exchanger are connected in parallel, allowing users to choose between using either the dry cooler or the second heat exchanger as needed. This parallel connection reduces flow resistance in the second loop, thus improving its heat exchange efficiency.

[0006] This application also provides an energy storage unit, which includes a first device, a second device, and a heat exchange system. The first device includes an energy storage battery and a battery cold plate. The second device includes a power device and a power device cold plate. The heat exchange system includes a first circuit and a second circuit. The first circuit includes a first branch and a first heat exchanger. The first branch is used to connect to the first device, and the first heat exchanger is disposed on the first branch. The second circuit includes a second branch and a third branch, which are connected in parallel. The second circuit is used to connect to the second device. The second branch is provided with a dry cooler, and the third branch is provided with a second heat exchanger. The heat exchange system also includes a refrigeration circuit, which includes a compressor. The first heat exchanger and the second heat exchanger are connected to the suction side of the compressor. The first device is connected to the first circuit of the heat exchange system, and the second device is connected to the second circuit of the heat exchange system.

[0007] This design improves the heat exchange efficiency and operational stability of the energy storage unit. The dry cooler and the second heat exchanger are connected in parallel, allowing users to choose between the dry cooler and / or the second heat exchanger as needed. This reduces flow resistance in the second loop, thereby improving its heat exchange efficiency. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram of a first embodiment of the heat exchange system provided in this application;

[0010] Figure 2 This is a schematic diagram of a second embodiment of the heat exchange system provided in this application.

[0011] Figure 3 This is a schematic diagram of a third embodiment of the heat exchange system provided in this application.

[0012] Figure 4 This is a schematic diagram of a fourth embodiment of the heat exchange system provided in this application.

[0013] Figure 5 This is a schematic diagram of the fifth embodiment of the heat exchange system provided in this application.

[0014] Figure Labels

[0015] 1-First circuit;

[0016] 11-First Branch Road;

[0017] 12-First heat exchanger;

[0018] 121 - First Channel;

[0019] 122 - Second Channel;

[0020] 13-First pump;

[0021] 2-Second circuit;

[0022] 21-Second Branch Road;

[0023] 22-Third Branch Road;

[0024] 23-Dry cooler;

[0025] 24 - Second heat exchanger;

[0026] 241 - Third Channel;

[0027] 242 - Fourth Channel;

[0028] 25 - First valve body;

[0029] 26 - Dehumidifying evaporator;

[0030] 27 - Second pump;

[0031] 3-Refrigeration circuit;

[0032] 31-Fourth Branch Road;

[0033] 32-Fifth Branch Road;

[0034] 33-Second valve body;

[0035] 34-Compressor;

[0036] 35 - Condenser;

[0037] 4-First equipment;

[0038] 5-Second equipment. Detailed Implementation

[0039] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0040] It should be understood that the described embodiments are merely some embodiments of this application, and not all embodiments. All other technical solutions obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0042] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0043] like Figure 1 As shown in the illustration, this application provides a heat exchange system comprising a first loop 1, a second loop 2, and a refrigeration loop 3. The first loop 1 includes a first branch 11 and a first heat exchanger 12. The first branch 11 is connected to a first device 4, and the first heat exchanger 12 is disposed on the first branch 11. The second loop 2 includes a second branch 21, which is connected to a second device 5. The second branch 21 is equipped with a dry cooler 23 and a second heat exchanger 24, which are connected in series. The refrigeration loop 3 includes a compressor 34, and the first heat exchanger 12 and the second heat exchanger 24 are connected to the suction side of the compressor 34. The working medium of the refrigeration loop 3 can exchange heat with the working medium of the first device 4 in the first heat exchanger 12 and with the working medium of the second device 5 in the second heat exchanger 24.

[0044] This design allows the heat exchange system to exchange heat with both the first device 4 and the second device 5 simultaneously, which helps to improve the heat exchange efficiency of the system.

[0045] like Figure 2 As shown in the illustration, this application provides a heat exchange system comprising a first loop 1, a second loop 2, and a refrigeration loop 3. The first loop 1 includes a first branch 11 and a first heat exchanger 12. The first branch 11 is connected to a first device 4, and the first heat exchanger 12 is disposed on the first branch 11. The second loop 2 includes a second branch 21 and a third branch 22, which are connected in parallel. The second loop 2 is connected to a second device 5. A dry cooler 23 is disposed on the second branch 21, and a second heat exchanger 24 is disposed on the third branch 22. The refrigeration loop 3 includes a compressor 34, and the first heat exchanger 12 and the second heat exchanger 24 are connected to the suction side of the compressor 34. The working medium of the refrigeration loop 3 can exchange heat with the working medium of the first device 4 in the first heat exchanger 12, and can exchange heat with the working medium of the second device 5 in the second heat exchanger 24.

[0046] The heat exchange system provided in this embodiment can simultaneously exchange heat between the first device 4 and the second device 5. The first heat exchanger 12 can exchange heat with the working medium of the first device 4, and the dry cooler 23 and the second heat exchanger 24 can exchange heat with the working medium of the second device 5. The refrigeration circuit 3 exchanges heat with the working media of the first device 4 and the second device 5 through the first heat exchanger 12 and the second heat exchanger 24. The parallel connection of the dry cooler 23 and the second heat exchanger 24 can reduce the flow resistance of the working medium of the second device 5 when it flows in the second circuit 2, thereby improving the heat exchange efficiency and the stability of the heat exchange system. Moreover, the parallel connection of the dry cooler 23 and the second heat exchanger 24 can be selected according to the needs of the second device 5 during use. When the heat output of the second device 5 is small, the dry cooler 23 can be used to exchange heat with the working medium of the second device 5. When the heat output of the second device 5 is high, the second heat exchanger 24 can be activated to exchange heat with the working medium of the second device 5. Alternatively, both the dry cooler 23 and the second heat exchanger 24 can be activated to improve the heat exchange efficiency of the second loop 2. This design is more flexible in practical use and can adapt to different situations.

[0047] like Figure 3 As shown, in one possible implementation, the second branch 21 and / or the third branch 22 are provided with a first valve body 25. The first valve body 25 may be a solenoid valve or the like.

[0048] The first valve body 25 is used to control the on / off state and flow rate of the corresponding branch, so that the user can adjust it according to the needs.

[0049] like Figure 3 As shown, in one possible implementation, the first valve body 25 can be provided in the third branch 22 to control the on / off state and flow rate of the branch where the second heat exchanger 24 is located.

[0050] When the heat output of the second device 5 is low, the temperature of its working medium is relatively low, and heat exchange can be achieved solely through the dry cooler 23. Therefore, the first valve 25 can be closed, shutting off the third branch 22, and the working medium of the second device 5 flows into the second branch 21 containing the dry cooler 23 for heat exchange. When the heat output of the second device 5 is high, the temperature of its working medium is relatively high, and heat dissipation through the dry cooler 23 alone is inefficient. Therefore, the first valve 25 can be opened, allowing the working medium of the second device 5 to enter the second heat exchanger 24 for heat dissipation, thereby improving the heat exchange efficiency of the second loop 2 for the working medium of the second device 5. The opening degree of the first valve 25 can be adjusted according to the heat exchange requirements of the second device 5, thereby controlling the flow rate of the third branch 22. The higher the temperature of the working medium of the second device 5, the larger the opening degree of the first valve 25, until it is fully open.

[0051] like Figure 4 As shown, in one possible implementation, the second circuit 2 further includes a dehumidifying evaporator 26, which is disposed in the third branch 22. The dehumidifying evaporator 26 is connected in series with the second heat exchange section and is located on the outlet side of the second heat exchange section.

[0052] The dehumidifying evaporator 26 can be used to dehumidify the space where the heat exchange system is located. After the working medium of the second device 5 is heat-exchanged through the second heat exchanger 24, its temperature is relatively low, which can cause water vapor in the space to condense. The condensate produced can be absorbed by the dehumidifying evaporator 26, thereby achieving the dehumidification effect and helping to reduce the impact of water vapor in the air on the heat exchange system, the first device 4, and the second device 5.

[0053] like Figure 4 As shown, in one possible implementation, the first circuit 1 is provided with a first pump 13, and the second circuit 2 is provided with a second pump 27.

[0054] The first pump 13 drives the working medium of the first device 4 to circulate in the first loop 1. The second pump 27 drives the working medium of the second device 5 to circulate in the second loop 2. This design facilitates the flow of the working medium in the corresponding loops, which helps to improve the flow efficiency of the working medium and thus improves the heat dissipation efficiency of the heat exchange system for the first device 4 and the second device 5.

[0055] like Figure 4 As shown, in one possible implementation, the first heat exchanger 12 includes a first channel 121 and a second channel 122, the first channel 121 being connected to the first branch 11 and the second channel 122 being connected to the refrigeration circuit 3. The second heat exchanger 24 includes a third channel 241 and a fourth channel 242, the third channel 241 being connected to the third branch 22 and the fourth channel 242 being connected to the refrigeration circuit 3.

[0056] This design allows the refrigeration circuit 3 to exchange heat with the working medium of the first device 4 in the first heat exchanger 12, thereby reducing the temperature of the working medium in the first device 4. Simultaneously, the refrigeration circuit 3 can exchange heat with the working medium of the second device 5 in the second heat exchanger 24, further reducing the temperature of the working medium in the first device 4. By incorporating the refrigeration circuit 3, the overall heat exchange efficiency of the heat exchange system can be improved, which is beneficial for controlling the temperatures of the first device 4 and the second device 5.

[0057] like Figure 4 As shown, in one possible implementation, the cooling circuit 3 includes a fourth branch 31 and a fifth branch 32 connected in parallel. The fourth branch 31 is connected to the second channel 122, and the fifth branch 32 is connected to the fourth channel 242.

[0058] This design allows the working medium of the refrigeration circuit 3 to flow into the first heat exchanger 12 and the second heat exchanger 24 respectively. This enables the working medium of the first device 4 to exchange heat with the working medium of the refrigeration circuit 3 in the first heat exchanger 12, and the working medium of the second device 5 to exchange heat with the working medium of the refrigeration circuit 3 in the second heat exchanger 24. The parallel design of the refrigeration circuit 3 reduces the flow resistance of the working medium, thereby improving the heat exchange efficiency of the refrigeration circuit 3 and ultimately enhancing the overall heat exchange efficiency of the heat exchange system.

[0059] like Figure 5 As shown, in one possible implementation, the refrigeration branch includes at least one second valve body 33 for controlling the flow rate of the fourth branch 31 and / or the fifth branch 32. The second valve body 33 may be an electronic expansion valve, etc.

[0060] The flow rate of the working medium in the fourth branch 31 and the fifth branch 32 can be controlled by setting the second valve body 33, thereby adjusting the heat exchange efficiency of the fourth branch 31 and the fifth branch 32 according to demand. In use, the flow rates of the fourth branch 31 and the fifth branch 32 can be controlled according to the heat exchange requirements of the first device 4 and the second device 5. When the heat exchange requirement of the first device 4 is large, the flow rate of the fourth branch 31 can be increased; when the heat exchange requirement of the second device 5 is large, the flow rate of the fourth branch 31 can be increased.

[0061] like Figure 4 As shown, in one possible implementation, the fourth branch 31 and the fifth branch 32 are each provided with a second valve body 33.

[0062] This design allows for better control of the flow rates in the fourth branch 31 and the fifth branch 32. When the heat exchange demand is low or no heat exchange is required, the corresponding branch can be closed via the second valve body 33. For example, when the heat exchange demand of the second device 5 is low, and heat exchange is only performed through the dry cooler 23 of the second circuit 2, and the second heat exchanger 24 is not working, the second valve body 33 corresponding to the fifth branch 32 can be closed, so that the working medium of the refrigeration circuit 3 flows to the first heat exchanger 12, thereby improving the utilization rate of the heat exchange medium in the refrigeration circuit 3 and increasing the heat exchange efficiency.

[0063] like Figure 5 As shown, in one possible implementation, the refrigeration circuit 3 includes a compressor 34 and a condenser 35, with the condenser 35 connected to the outlet side of the compressor 34.

[0064] The condenser 35 is used to condense the working medium flowing out of the compressor 34, so that the high-temperature and high-pressure gaseous working medium flowing out of the compressor 34 is transformed into a liquid working medium, which then flows to the first hot gas and the second heat exchanger 24 for heat exchange.

[0065] Based on the above embodiments, this application also provides an energy storage unit, which includes a first device 4, a second device 5, and a heat exchange system. The first device 4 includes an energy storage battery and a battery cold plate. The second device 5 includes a power output device and a power device cold plate, wherein the power device can be an energy storage converter, etc. The heat exchange system can be any of the heat exchange systems involved in the above embodiments. The first device 4 is connected to the first loop 1 of the heat exchange system, and the second device 5 is connected to the second loop 2 of the heat exchange system.

[0066] This heat exchange system design allows for simultaneous heat exchange between the first device 4 and the second device 5. The parallel connection of the dry cooler 23 and the second heat exchanger 24 not only reduces the flow resistance of the second loop 2 but also allows the user to adjust the second loop 2, selecting between heat exchange via the dry cooler 23 and / or the second heat exchanger 24 based on actual needs. This design improves heat exchange efficiency, reduces energy consumption, and better meets practical usage requirements.

[0067] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A heat exchange system, characterized in that, The heat exchange system includes a first loop (1) and a second loop (2). The first loop (1) includes a first branch (11) and a first heat exchanger (12). The first branch (11) is used to connect to a first device (4). The first heat exchanger (12) is disposed on the first branch (11). The second loop (2) includes a second branch (21) and a third branch (22). The second branch (21) and the third branch (22) are connected in parallel. The second loop (2) is used to connect to a second device (5). The second branch (21) is provided with a dry cooler (23). The third branch (22) is provided with a second heat exchanger (24). The heat exchange system also includes a refrigeration loop (3). The refrigeration loop (3) includes a compressor (34). The first heat exchanger (12) and the second heat exchanger (24) are connected to the suction side of the compressor (34).

2. The heat exchange system according to claim 1, characterized in that, The second branch (21) and / or the third branch (22) are provided with a first valve body (25).

3. The heat exchange system according to claim 1, characterized in that, The second circuit (2) includes a dehumidifying evaporator (26), which is located in the third branch (22). The dehumidifying evaporator (26) is located on the outlet side of the second heat exchanger (24) and is connected in series with the second heat exchanger (24).

4. The heat exchange system according to claim 1, characterized in that, The first circuit (1) is equipped with a first pump (13), and the second circuit (2) is equipped with a second pump (27).

5. The heat exchange system according to any one of claims 1 to 4, characterized in that, The first heat exchanger (12) includes a first channel (121) and a second channel (122). The first channel (121) is connected to the first branch (11), and the second channel (122) is connected to the refrigeration circuit (3). The second heat exchanger (24) includes a third channel (241) and a fourth channel (242). The third channel (241) is connected to the third branch (22), and the fourth channel (242) is connected to the refrigeration circuit (3).

6. The heat exchange system according to claim 5, characterized in that, The refrigeration circuit (3) includes a fourth branch (31) and a fifth branch (32) connected in parallel. The fourth branch (31) is connected to the second channel (122), and the fifth branch (32) is connected to the fourth channel (242).

7. The heat exchange system according to claim 6, characterized in that, The refrigeration circuit (3) includes at least one second valve body (33) for controlling the flow rate of the fourth branch (31) and / or the fifth branch (32).

8. The heat exchange system according to claim 7, characterized in that, The fourth branch (31) and the fifth branch (32) are respectively provided with the second valve body (33).

9. The heat exchange system according to claim 5, characterized in that, The refrigeration circuit (3) includes a condenser (35) which is connected to the outlet side of the compressor (34).

10. An energy storage unit, characterized in that, The energy storage unit includes a first device (4), a second device (5), and a heat exchange system. The first device (4) includes an energy storage battery and a battery cold plate. The second device (5) includes a power device and a power device cold plate. The heat exchange system includes a first loop (1) and a second loop (2). The first loop (1) includes a first branch (11) and a first heat exchanger (12). The first branch (11) is used to connect to the first device (4), and the first heat exchanger (12) is disposed on the first branch (11). The second loop (2) includes a second branch (21) and a third branch (22). (21) is connected in parallel with the third branch (22), the second circuit (2) is used to connect with the second device (5), the second branch (21) is provided with a dry cooler (23), the third branch (22) is provided with a second heat exchanger (24), the heat exchange system also includes a refrigeration circuit (3), the refrigeration circuit (3) includes a compressor (34), the first heat exchanger (12) and the second heat exchanger (24) are connected to the suction side of the compressor (34), the first device (4) is connected to the first circuit (1) of the heat exchange system, and the second device (5) is connected to the second circuit (2) of the heat exchange system.

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