Liquid cooling unit and energy storage cabinet

Abstract

The utility model discloses a liquid cooling unit and an energy storage cabinet, and belongs to the technical field of energy storage. In the liquid cooling unit, an evaporator is used for receiving liquid cooling media output by a first condensing device and a second condensing device, and a first compressor and a second compressor are used for receiving the liquid cooling media output by the evaporator; an included angle is formed between the heat dissipation surface of the first condensing device and the heat dissipation surface of the second condensing device, and an air opening of the fan faces an opening where the included angle is formed; each of the first condensing device and the second condensing device comprises a first channel and a second channel which are independent from each other, and the first channels of the first condensing device and the second condensing device are used for receiving a liquid cooling medium output by the first compressor; and the second channels of the first condensing device and the second condensing device are used for receiving the liquid cooling medium output by the second compressor. Under the condition of low-load refrigerating capacity demand, the air quantity of the fan can completely flow through the running condensing device, so that the air quantity waste is avoided, the air leakage problem is solved, and the energy efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of energy storage, and particularly relates to a liquid cooling unit and an energy storage cabinet. BACKGROUND

[0002] The energy storage cabinet is widely used in the field of electrochemical energy storage as a storage form of an energy storage system. The energy storage cabinet comprises a cabinet body and a battery pack and a liquid cooling unit arranged in the cabinet body, and the liquid cooling unit is used for heat dissipation treatment of the battery pack.

[0003] In the related art, the liquid cooling unit usually comprises two independent liquid cooling units, each of which comprises a compressor, a condenser, an evaporator, a throttle valve and a fan connected in sequence. The two sets of condensers of the two liquid cooling units are arranged in a V shape, and the fan is arranged at the top of the two sets of condensers arranged in a V shape, so that the liquid cooling unit can adopt a side-inlet air and top-outlet air architecture with more fluent air flow organization.

[0004] However, since the fan is shared by the two liquid cooling units, when one of the two liquid cooling units is not working, the air volume generated by the fan will flow through the condenser of the non-working liquid cooling unit at the same time, so that part of the air volume cannot play a role in taking away heat, thereby causing the liquid cooling unit to have the problem of air leakage and reducing energy efficiency. UTILITY MODEL CONTENT

[0005] The embodiment of the utility model provides a liquid cooling unit and an energy storage cabinet, which can solve the technical problems existing in the related art. Specifically, the technical scheme is as follows.

[0006] On the one hand, a liquid cooling unit is provided, which comprises an evaporator, a first condensing device, a first compressor, a second condensing device, a second compressor and a fan. The evaporator is used for receiving liquid cooling medium output by the first condensing device and the second condensing device, and the first compressor and the second compressor are used for receiving liquid cooling medium output by the evaporator. The heat dissipation surface of the first condensing device and the heat dissipation surface of the second condensing device form an included angle, and the air inlet of the fan is arranged at the opening of the included angle. The first condensing device and the second condensing device each comprise a first channel and a second channel independent of each other. The first channel of the first condensing device and the first channel of the second condensing device are each used for receiving liquid cooling medium output by the first compressor, and the second channel of the first condensing device and the second channel of the second condensing device are each used for receiving liquid cooling medium output by the second compressor.

[0007] The liquid cooling unit provided by the embodiment of the utility model, through setting up the first channel and the second channel which are independent of each other in the first condensing device and the second condensing device which are arranged at an included angle, the first channel is connected with the first compressor and the evaporator, and the second channel is connected with the second compressor and the evaporator, so that the first condensing device and the second condensing device respectively form the first compression refrigeration module with the first compressor, and the first condensing device and the second condensing device respectively form the second compression refrigeration module with the second compressor. In this way, the first compression refrigeration module and the second compression refrigeration module both have condensing flow channels located at both sides of the included angle. By such arrangement, under the condition of low load refrigeration capacity demand, even if one of the first compression refrigeration module and the second compression refrigeration module is in the running state, the refrigerant flows in the first condensing device and the second condensing device at both sides of the included angle, that is, the condensers on both sides of the V-shaped heat exchanger are in operation, so that the air volume drawn and discharged by the fan flows through the first condensing device and the second condensing device at both sides of the included angle at the same time, the air volume provided by the fan is effectively prevented from being partially wasted, the air leakage problem of the liquid cooling unit is solved, and the energy efficiency thereof is improved.

[0008] In some possible implementation manners, the first condensing device and the second condensing device are respectively one condenser, and the one condenser includes the first channel and the second channel.

[0009] Under the condition of low load refrigeration capacity demand, when one of the first compression refrigeration module and the second compression refrigeration module is in operation, the first condensing device and the second condensing device are both in the running state, and the air volume drawn and discharged by the fan flows through the heat dissipation surfaces of the first condensing device and the second condensing device at both sides of the V-shaped heat exchanger at the same time, so that the air leakage problem is effectively avoided, and the energy efficiency is improved.

[0010] For example, the one condenser includes two input interfaces, one of the two input interfaces is used for connecting the first channel and the first compressor, and the other of the two input interfaces is used for connecting the second channel and the second compressor. As can be seen, by designing the condenser as a multi-flow channel, one condenser can be used to simultaneously serve two compression refrigeration modules.

[0011] In some possible implementation manners, the first condensing device and the second condensing device are respectively a plurality of condensers, and the plurality of condensers are stacked in opposite directions of the heat dissipation surfaces; two condensers are included in the plurality of condensers, the first channel is located in one of the two condensers, and the second channel is located in the other of the two condensers.

[0012] In the case of low load refrigeration capacity demand, when one of the first compression refrigeration module and the second compression refrigeration module is running, the first condensing device and the second condensing device are both in operation, the air volume drawn by the fan flows through the heat dissipation surfaces of the first condensing device and the second condensing device on both sides of the V-shaped heat exchanger at the same time, effectively avoiding the problem of air leakage and improving the energy efficiency.

[0013] Further, the condenser with the first channel in the first condensing device is closer to the fan than the condenser with the second channel, and the condenser with the second channel in the second condensing device is closer to the fan than the condenser with the first channel.

[0014] Alternatively,

[0015] The condenser with the second channel in the first condensing device is closer to the fan than the condenser with the first channel, and the condenser with the first channel in the second condensing device is closer to the fan than the condenser with the second channel.

[0016] In this way, one of the two condensers of the first compression refrigeration module is arranged in the windward row, and the other is arranged in the leeward row, and similarly, one of the two condensers of the second compression refrigeration module is arranged in the windward row, and the other is arranged in the leeward row, effectively avoiding the situation that one of the first compression refrigeration module and the second compression refrigeration module is always arranged in the windward row and the other is always arranged in the leeward row, so that the arrangement of the condensers in the first compression refrigeration module and the second compression refrigeration module is more balanced, and therefore, in the case of low load refrigeration capacity demand, the heat dissipation effect of the fan on the first compression refrigeration module and the second compression refrigeration module is the same.

[0017] In another aspect, another liquid cooling unit is provided, which includes an evaporator, a first condensing device, a first compressor, a second condensing device, a second compressor, a fan and a partition; the evaporator is configured to receive liquid cooling medium output by the first condensing device and the second condensing device, the first compressor and the second compressor are configured to receive liquid cooling medium output by the evaporator, the first condensing device is configured to receive liquid cooling medium output by the first compressor, and the second condensing device is configured to receive liquid cooling medium output by the second compressor; the heat dissipation surface of the first condensing device and the heat dissipation surface of the second condensing device are arranged at an angle, and the air outlet of the fan is arranged at an opening of the angle; the partition is located between the two heat dissipation surfaces arranged at an angle to shield the two heat dissipation surfaces, wherein the partition is configured to form a first cavity with the heat dissipation surface of the first condensing device, and the partition is configured to form a second cavity with the heat dissipation surface of the second condensing device; when one of the first condensing device and the second condensing device is in an operating state, the fan is configured to provide all air volume to one of the first cavity and the second cavity.

[0018] The liquid cooling unit provided by the embodiment of the utility model, through setting the partition between the first condensing device and the second condensing device arranged at an angle of heat dissipation surface, the partition shields the first condensing device and the second condensing device. In the case of low load refrigeration capacity demand, even if one of the first condensing device and the second condensing device is in an operating state, due to the shielding effect of the partition, all air volume extracted and exhausted by the fan can be provided to one of the first cavity and the second cavity. For example, when only the first condensing device is in an operating state, all air volume extracted and exhausted by the fan can be provided to the first cavity, and when only the second condensing device is in an operating state, all air volume extracted and exhausted by the fan can be provided to the second cavity, so that the fan only serves the one of the first condensing device and the second condensing device in an operating state, effectively avoiding the waste of air volume provided by the fan, solving the air leakage problem of the liquid cooling unit and improving the energy efficiency thereof.

[0019] In some possible implementation manners, the partition is a fixed partition, and the fan includes a first fan and a second fan; the first fan is located at the opening of the first cavity, and the second fan is located at the opening of the second cavity.

[0020] In the case of low load refrigeration capacity demand, when the first condensing device is operated, only the first fan can be started, and due to the fixed partition, the air volume of the first fan only passes through the first condensing device, avoiding the air volume of the first fan passing through the second condensing device. When the second condensing device is operated, only the second fan can be started, and due to the fixed partition, the air volume of the second fan only passes through the second condensing device, avoiding the air volume of the second fan passing through the first condensing device. It can be seen that the fan is only used for the working condenser, effectively avoiding the air leakage problem and improving the energy efficiency of the liquid cooling unit.

[0021] In some possible implementations, the partition is a movable partition, the movable partition is rotationally arranged, and an axis of rotation of the movable partition is located on a side away from the fan between the two heat dissipation surfaces arranged at an angle; the liquid cooling unit further comprises a driving mechanism fixedly connected to the movable partition, and the driving mechanism is used to drive the movable partition to be combined with the heat dissipation surface of the first condensing device or the heat dissipation surface of the second condensing device.

[0022] In the case of low load refrigeration capacity demand, when the first condensing device is operated, the movable partition is swung to be combined with the surface of the second condensing device, and the air volume drawn and discharged is blocked from flowing through the non-working second condensing device. When the second condensing device is operated, the movable partition is swung to be combined with the surface of the first condensing device, and the air volume drawn and discharged is blocked from flowing through the non-working first condensing device. It can be seen that the fan is only used for the working condenser, effectively avoiding the air leakage problem and improving the energy efficiency of the liquid cooling unit.

[0023] In another aspect, a liquid cooling unit is also provided, which comprises a box body, a first condensing device and a second condensing device arranged in the box body, and a fan arranged between the first condensing device and the second condensing device, wherein the first condensing device and the second condensing device are arranged at an angle, and the fan is arranged to draw and discharge air volume to the first condensing device and the second condensing device.

[0024] The energy storage cabinet provided in the embodiment of the utility model has all the advantages of the liquid cooling unit described above, and details are not repeated here. The liquid cooling unit is used for temperature regulation of the battery pack of the energy storage cabinet, and can perform thermal management on the battery pack, so that the battery pack is maintained in a comfortable temperature zone with high charging and discharging efficiency.

[0025] In some possible implementations, the side wall of the box body is provided with an air inlet, and the top wall of the box body is provided with an air outlet, the air inlet faces the first condensing device and the second condensing device, the air outlet faces the fan, and the opening of the angle faces the top wall of the box body.

[0026] The air inlet and the air outlet form a heat dissipation channel, and since the air outlet is arranged on the top wall of the cabinet and the air inlet is arranged on the side wall of the cabinet, the energy storage cabinet adopts a side air inlet and top air outlet structure with more smooth air flow organization, so that the energy storage cabinet does not affect the air inlet and outlet when arranged in an application scene, high-density layout is achieved, the land occupation space is further reduced, and the land occupation density is improved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 A structure schematic view of a first exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure.

[0028] Figure 2 A structure schematic view of a first exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure. Figure 1 A structure schematic view of a condenser in the liquid cooling unit shown in the figure.

[0029] Figure 3 A structure schematic view of a second exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure.

[0030] Figure 4 A structure schematic view of a third exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure.

[0031] Figure 5 A structure schematic view of a fourth exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure.

[0032] Figure 6 An appearance view of an exemplary liquid cooling unit provided by the utility model embodiment is shown in the figure.

[0033] Figure 7 A structure schematic view of an exemplary energy storage cabinet provided by the utility model embodiment is shown in the figure.

[0034] The reference signs respectively represent:

[0035] 001, first compression refrigeration module; 002, second compression refrigeration module;

[0036] 100, evaporator;

[0037] 200, condenser; 201, first condensing device; 202, second condensing device; 203, input interface; 204, output interface;

[0038] 301, first compressor; 302, second compressor;

[0039] 400, fan; 401, first fan; 402, second fan;

[0040] 500, throttling valve;

[0041] 600a, fixed partition; 600b, movable partition;

[0042] 700, frame;

[0043] 800, cabinet; 801, air inlet; 802, air outlet. DETAILED DESCRIPTION

[0044] The energy storage cabinet, also known as an energy storage container, includes a battery pack for electrical energy storage. Since the battery pack generates heat during charging and discharging, in consideration of the electrical performance, service life and safety of the battery pack, a liquid cooling unit is usually arranged in the energy storage cabinet to cool the battery pack. Specifically, the battery pack is in close contact with a liquid cooling pipeline or a liquid cooling plate circulating with a liquid cooling medium (for example, the liquid cooling medium can be water), the outlet of the liquid cooling pipeline or the liquid cooling plate is connected in communication with the water return port of the liquid cooling unit, and the inlet of the liquid cooling pipeline or the liquid cooling plate is connected in communication with the water supply port of the liquid cooling unit. After the low-temperature liquid cooling medium absorbs the heat generated by the battery pack in the liquid cooling pipeline or the liquid cooling plate, the heat-carrying liquid cooling medium enters the inside of the liquid cooling unit through the outlet of the liquid cooling pipeline or the liquid cooling plate and the water return port of the liquid cooling unit in turn. The heat-carrying liquid cooling medium is cooled when it exchanges heat with the external environment in the liquid cooling unit, and the low-temperature liquid cooling medium formed is circulated into the liquid cooling pipeline or the liquid cooling plate again through the water supply port of the liquid cooling unit and the inlet of the liquid cooling pipeline or the liquid cooling plate to perform the next cycle.

[0045] The liquid cooling unit usually includes an evaporator, a compressor, a condenser, a throttling valve and a fan, wherein the evaporator has a refrigerant circulation channel and a liquid cooling medium circulation channel. For example, for a shell-and-tube evaporator, the inner cavity of the tube bundle is the refrigerant circulation channel, and the space between the shell and the tube bundle is the liquid cooling medium circulation channel. The two ends of the liquid cooling medium circulation channel are the water supply port and the water return port mentioned above.

[0046] The outlet of the refrigerant circulation channel of the evaporator, the compressor, the condenser, the throttling valve and the inlet of the refrigerant circulation channel of the evaporator are connected in turn by pipelines, and the fan is used to cool the condenser. Thus, the working principle of the liquid cooling unit is as follows: the low-temperature and low-pressure refrigerant gas after heat exchange in the evaporator is compressed by the compressor to form high-pressure and high-temperature gas, the high-pressure and high-temperature gas is delivered to the condenser to cool and release heat and form medium-temperature and high-pressure liquid, the medium-temperature and high-pressure liquid enters the throttling valve to be throttled and decompressed to form low-temperature and low-pressure gas-liquid two-phase refrigerant, and the low-temperature and low-pressure gas-liquid two-phase refrigerant is circulated to the evaporator to exchange heat with the liquid cooling medium circulating therein (i.e., evaporate and absorb heat) to form low-temperature and low-pressure refrigerant gas and enter the compressor again to perform the next cycle.

[0047] Based on reliability and availability considerations, the liquid cooling unit in the energy storage cabinet is usually arranged as two independent units, so that if one of the liquid cooling units fails, the other liquid cooling unit can operate normally to ensure that the energy storage cabinet will not be forced to interrupt operation. At present, a common arrangement of the liquid cooling unit is that the heat dissipation surface of the condenser of the liquid cooling unit A and the heat dissipation surface of the condenser of the liquid cooling unit B are arranged at an angle, that is, arranged in a V shape. The heat dissipation surface of the condenser is also the fin surface outside the condenser, also known as the large surface of the condenser. The fan is located between the heat dissipation surface of the condenser of the liquid cooling unit A and the heat dissipation surface of the condenser of the liquid cooling unit B, and is used to simultaneously draw and exhaust hot air to the heat dissipation surface of the condenser of the liquid cooling unit A and the heat dissipation surface of the condenser of the liquid cooling unit B for heat exchange.

[0048] The condensers of the liquid cooling unit A and the liquid cooling unit B arranged in a V shape can be collectively referred to as a V-shaped heat exchanger, that is, the condenser of the liquid cooling unit A is located at one side of the V-shaped heat exchanger, and the condenser of the liquid cooling unit B is located at the other side of the V-shaped heat exchanger. By such arrangement, not only can it be ensured that the liquid cooling unit will not be interrupted at will, but also the heat dissipation area can be increased, the air flow can be optimized, and in addition, one of the liquid cooling unit A and the liquid cooling unit B can be selected to work according to the actual working condition of the energy storage cabinet, or both of them can work at the same time.

[0049] Due to the different requirements for refrigerating capacity of the energy storage cabinet under different working conditions, the energy storage cabinet can have low-load refrigerating capacity requirements and medium-high load refrigerating capacity requirements. For example, the low-load refrigerating capacity requirement working condition of the energy storage cabinet can be as follows: when the environmental temperature is suitable and the battery is at rest, the low-power charging and discharging and the environmental temperature is moderate, the state of charge of the battery is low (for example, less than 30%), etc. The medium-high load refrigerating capacity requirement working condition of the energy storage cabinet can be as follows: high-temperature environment and high-power charging and discharging, battery thermal management system failure, internal short circuit of battery pack, long-time high-load operation condition, etc.

[0050] In the case of medium-high load refrigerating capacity requirement, the liquid cooling unit A and the liquid cooling unit B are both operated, the air duct of the liquid cooling unit is relatively smooth, and the unit can be kept at a high energy efficiency level.

[0051] In the case of low-load refrigerating capacity requirement, if the liquid cooling unit A and the liquid cooling unit B are both operated at a very low speed, the motor efficiency of the compressor is reduced, resulting in a low overall unit energy efficiency. Therefore, one of the liquid cooling units needs to be turned off, and the compressor speed of the other operating liquid cooling unit needs to be increased to improve the overall unit energy efficiency.

[0052] Since the fan is located between the condenser of the liquid cooling unit A and the condenser of the liquid cooling unit B, the air volume (i.e. the amount of air delivered by the fan when the fan is running) drawn and discharged by the fan is simultaneously supplied to the liquid cooling unit A and the liquid cooling unit B, wherein the air volume generated by the blades of the fan close to the condenser of the liquid cooling unit A mainly passes through the condenser of the liquid cooling unit A, the air volume generated by the blades of the fan close to the condenser of the liquid cooling unit B mainly passes through the condenser of the liquid cooling unit B, and when the fan is arranged in the middle between the two, it can be considered that about 50% of the air volume flows through the liquid cooling unit A and the other 50% of the air volume flows through the liquid cooling unit B.

[0053] However, when only one liquid cooling unit is running, for example, only the liquid cooling unit A is running and the liquid cooling unit B is not working, the air volume drawn and discharged by the fan still simultaneously flows through the condenser of the liquid cooling unit A and the condenser of the liquid cooling unit B, the air flowing through the condenser of the liquid cooling unit A plays a role in taking away heat, while the air flowing through the condenser of the liquid cooling unit B cannot play a role in taking away heat (because the liquid cooling unit B is not running and does not generate heat), thereby causing the air volume drawn and discharged by the fan to be partially wasted, resulting in air leakage of the liquid cooling unit and reducing energy efficiency.

[0054] To solve the above technical problems, the utility model embodiment provides a liquid cooling unit, as shown in the accompanying Figure 1 or as shown in the accompanying Figure 3 The liquid cooling unit includes an evaporator 100, a first condensing device 201, a first compressor 301, a second condensing device 202, a second compressor 302 and a fan 400. The evaporator 100 is used to receive the liquid cooling medium output by the first condensing device 201 and the second condensing device 202, and the first compressor 301 and the second compressor 302 are used to receive the liquid cooling medium output by the evaporator 100. The heat dissipation surfaces of the first condensing device 201 and the second condensing device 202 are at an angle, and the air inlet of the fan 400 is arranged towards the opening of the angle. The first condensing device 201 and the second condensing device 202 each include a first channel and a second channel independent of each other, the first channel of the first condensing device 201 and the second condensing device 202 is used to receive the liquid cooling medium output by the first compressor 301, and the second channel of the first condensing device 201 and the second condensing device 202 is used to receive the liquid cooling medium output by the second compressor 302.

[0055] It should be noted that (1) the air inlet of the fan 400 is arranged towards the opening of the angle, wherein the air inlet can be the air inlet of the fan 400, so that the fan 400 can draw out the hot air at the heat dissipation surfaces of the first condensing device 201 and the second condensing device 202 and discharge it to the outside.

[0056] (2) The heat dissipation surfaces of the first condensing device 201 and the second condensing device 202 are arranged at an angle, so that a V-shaped space is formed between the two heat dissipation surfaces. At this time, it can be considered that the first condensing device 201 and the second condensing device 202 together constitute a V-shaped heat exchanger.

[0057] The liquid cooling unit provided in the embodiments of the present application is provided with the first channel and the second channel which are independent of each other in the first condensing device 201 and the second condensing device 202 arranged at an angle. The first channel is connected to the first compressor 301 and the evaporator 100, and the second channel is connected to the second compressor 302 and the evaporator 100. Thus, the first condensing device 201 and the second condensing device 202 constitute the first compression refrigeration module 001 together with the first compressor 301, and the first condensing device 201 and the second condensing device 202 constitute the second compression refrigeration module 002 together with the second compressor 302. In this way, the first compression refrigeration module 001 and the second compression refrigeration module 002 both have condensing flow channels located on both sides of the angle. In this way, under the condition of low load refrigeration capacity demand, even if one of the first compression refrigeration module 001 and the second compression refrigeration module 002 is in a running state, refrigerant flows in the first condensing device 201 and the second condensing device 202 on both sides of the angle, that is, the condensers on both sides of the V-shaped heat exchanger are in operation. Thus, the air volume drawn and discharged by the fan 400 flows through the first condensing device 201 and the second condensing device 202 on both sides of the angle at the same time, effectively avoiding the waste of the air volume provided by the fan 400, solving the problem of air leakage of the liquid cooling unit, and improving the energy efficiency.

[0058] For the scheme of arranging the first channel and the second channel which are independent of each other in the first condensing device 201 and the second condensing device 202 arranged at an angle, it includes but is not limited to the following examples:

[0059] In some examples (1), referring to Figure 1 and Figure 2 , the first condensing device 201 and the second condensing device 202 are each a condenser 200. The condenser 200 includes the first channel and the second channel, and of course, the condenser 200 can also include other channels in addition to the first channel and the second channel.

[0060] The first channel of the first condensing device 201 and the first channel of the second condensing device 202 are respectively used for circulating the refrigerant of the first compression refrigeration module 001, and the second channel of the first condensing device 201 and the second channel of the second condensing device 202 are respectively used for circulating the refrigerant of the second compression refrigeration module 002. Thus, the first condensing device 201 belongs to both the first compression refrigeration module 001 and the second compression refrigeration module 002, and the second condensing device 202 belongs to both the first compression refrigeration module 001 and the second compression refrigeration module 002.

[0061] In this way, in the case of low load refrigeration capacity demand, when one of the first compression refrigeration module 001 and the second compression refrigeration module 002 is running, the first condensing device 201 and the second condensing device 202 are both in operation, and the air volume drawn by the fan 400 flows through the heat dissipation surfaces of the first condensing device 201 and the second condensing device 202 on both sides of the V-shaped heat exchanger at the same time, effectively avoiding the problem of air leakage and improving the energy efficiency.

[0062] In combination with Figure 2 As shown in the figure, the condenser 200 described above includes two input interfaces 203, one of the two input interfaces 203 is used to connect the first channel and the first compressor 301, and the other of the two input interfaces 203 is used to connect the second channel and the second compressor 302. Correspondingly, the condenser 200 described above includes two output interfaces 204, one of the two output interfaces 204 is used to connect the first channel and one of the evaporation channels of the evaporator 100, and the other of the two output interfaces 204 is used to connect the second channel and another evaporation channel of the evaporator 100.

[0063] As can be seen, by designing the condenser 200 as a multi-flow channel, one condenser 200 can be used to serve two compression refrigeration modules at the same time.

[0064] For example, the first condensing device 201 and the second condensing device 202 can both be three-flow condensers, also known as three-fluid condensers, which have three independent fluid channels. The multi-flow channel design is beneficial to increase the area and efficiency of heat transfer. The embodiment of the present application uses a three-flow condenser known at present, uses two flow channels of the three-flow condenser to serve the first compression refrigeration module 001 and the second compression refrigeration module 002, and the above-mentioned purpose can be achieved.

[0065] In some examples (2), referring to Figure 3 , the first condensing device 201 and the second condensing device 202 are respectively a plurality of condensers 200, and the plurality of condensers 200 are stacked in opposite directions of the heat dissipation surfaces; the plurality of condensers 200 include two condensers 200, the first channel is located in one of the two condensers 200, and the second channel is located in the other of the two condensers 200.

[0066] Figure 3It is shown that two condensers 200 are arranged on the left side of the V-shaped heat exchanger, and the heat dissipation surfaces of the two condensers 200 are arranged in a relative stack. Similarly, two condensers 200 are arranged on the right side of the V-shaped heat exchanger, and the heat dissipation surfaces of the two condensers 200 are arranged in a relative stack. For the first compression refrigeration module 001, the refrigerant thereof circulates in one condenser 200 on the left side of the V-shaped heat exchanger and one condenser 200 on the right side of the V-shaped heat exchanger, respectively. Similarly, for the second compression refrigeration module 002, the refrigerant thereof circulates in the other condenser 200 on the left side of the V-shaped heat exchanger and the other condenser 200 on the right side of the V-shaped heat exchanger, respectively.

[0067] In this way, in the case of low load refrigeration capacity demand, when one of the first compression refrigeration module 001 and the second compression refrigeration module 002 is operated, the first condensing device 201 and the second condensing device 202 are both in operation, and the air volume drawn and discharged by the fan 400 simultaneously flows through the heat dissipation surfaces of the first condensing device 201 and the second condensing device 202 on both sides of the V-shaped heat exchanger, effectively avoiding the problem of air leakage and improving the energy efficiency.

[0068] For the condensers 200 involved in example (2), both can be single-flow condensers or double-flow condensers.

[0069] For example (2), for the two condensers 200 on one side of the V-shaped heat exchanger, one of the two condensers 200 belongs to the first compression refrigeration module 001, and the other belongs to the second compression refrigeration module 002. It can be that the condenser 200 of the first compression refrigeration module 001 is closer to the fan 400 or farther away from the fan 400 than the condenser 200 of the second compression refrigeration module 002.

[0070] For the condenser 200 close to the fan 400, it is in the outflow position and can be considered to be in the leeward row. For the condenser 200 far away from the fan 400, it is in the inflow position and can be considered to be in the windward row.

[0071] As shown in the accompanying drawings, Figure 3 It can be that the condenser 200 with the first channel in the first condensing device 201 is closer to the fan 400 than the condenser 200 with the second channel, and the condenser 200 with the second channel in the second condensing device 202 is closer to the fan 400 than the condenser 200 with the first channel. Alternatively, the condenser 200 with the second channel in the first condensing device 201 can be closer to the fan 400 than the condenser 200 with the first channel, and the condenser 200 with the first channel in the second condensing device 202 can be closer to the fan 400 than the condenser 200 with the second channel.

[0072] In this way, one of the two condensers 200 of the first compression refrigeration module 001 is arranged in the windward row, and the other is arranged in the leeward row, and one of the two condensers 200 of the second compression refrigeration module 002 is arranged in the windward row, and the other is arranged in the leeward row, so that one of the first compression refrigeration module 001 and the second compression refrigeration module 002 is always arranged in the windward row, and the other is always arranged in the leeward row, so that the arrangement of the condensers 200 in the first compression refrigeration module 001 and the second compression refrigeration module 002 is more balanced, and thus, under the condition of low load refrigeration capacity demand, the cooling effect of the fan 400 on the first compression refrigeration module 001 and the second compression refrigeration module 002 is the same.

[0073] For any of the above-mentioned liquid cooling units, the evaporator 100 involved includes at least two independent evaporation channels, one of which is connected to the first channel of the first condensing device 201 and the second condensing device 202, and the other is connected to the second channel of the first condensing device 201 and the second condensing device 202. The evaporator 100 can be provided as a single evaporator as shown in Figure 1 Or Figure 3 The evaporator 100 can also be provided as two independent evaporators, each having one evaporation channel, so that each evaporator is connected to the corresponding condensing device based on its evaporation channel (not shown in the figure).

[0074] On the other hand, the embodiments of the present disclosure provide another liquid cooling unit, as shown in Figure 4 Or as shown in Figure 5 The liquid cooling unit includes an evaporator 100, a first condensing device 201, a first compressor 301, a second condensing device 202, a second compressor 302, a fan 400 and a partition; the evaporator 100 is used to receive the liquid cooling medium output by the first condensing device 201 and the second condensing device 202, the first compressor 301 and the second compressor 302 are used to receive the liquid cooling medium output by the evaporator 100, the first condensing device 201 is used to receive the liquid cooling medium output by the first compressor 301, and the second condensing device 202 is used to receive the liquid cooling medium output by the second compressor 302; the heat dissipation surface of the first condensing device 201 and the heat dissipation surface of the second condensing device 202 form an angle, and the air inlet of the fan 400 is arranged at the opening of the angle.

[0075] A partition is located between two heat dissipation surfaces arranged at an angle to block the two heat dissipation surfaces. The partition is used to form a first cavity with the heat dissipation surface of the first condensing device 201 and a second cavity with the heat dissipation surface of the second condensing device 202. When one of the first condensing device 201 and the second condensing device 202 is in operation, the fan 400 is used to provide all the air volume to one of the first cavity and the second cavity.

[0076] The liquid-cooled unit provided in this embodiment of the invention uses a partition between a first condensing device 201 and a second condensing device 202 arranged at an angle to each other on their heat dissipation surfaces. This partition isolates the first condensing device 201 from the second condensing device 202. Under low-load cooling demand, even if one of the first condensing device 201 or the second condensing device 202 is operating, the partition ensures that all the airflow drawn by the fan 400 is supplied to either the first cavity or the second cavity. For example, when only the first condensing device 201 is operating, all the airflow drawn by the fan 400 is supplied to the first cavity; when only the second condensing device 202 is operating, all the airflow drawn by the fan 400 is supplied to the second cavity. Thus, the fan 400 serves only the operating unit, effectively preventing the airflow from being wasted, solving the air leakage problem of the liquid-cooled unit, and improving its energy efficiency.

[0077] The scheme of installing baffles in the first condensing device 201 and the second condensing device 202 arranged at an angle includes, but is not limited to, the following examples:

[0078] In some examples (3), as shown in the appendix Figure 4 As shown, the partition is a fixed partition 600a, and the fan 400 includes a first fan 401 and a second fan 402; the first fan 401 is located at the opening of the first cavity, and the second fan 402 is located at the opening of the second cavity.

[0079] In this example (3), the fan 400 is configured as a first fan 401 for the first condensing unit 201 and a second fan 402 for the second condensing unit 202. Meanwhile, a fixed partition 600a is provided between the first condensing unit 201 and the second condensing unit 202 to divide the V-shaped cavity of the V-type heat exchanger into two sub-cavities. The first fan 401 is located at the opening of the sub-cavity between the first condensing unit 201 and the fixed partition 600a, and the second fan 402 is located at the opening of the sub-cavity between the second condensing unit 202 and the fixed partition 600a.

[0080] Under low-load cooling capacity requirements, when the first condenser unit 201 is running, only the first fan 401 needs to be turned on. Due to the effect of the fixed partition 600a, the airflow from the first fan 401 only passes through the first condenser unit 201, preventing it from passing through the second condenser unit 202. Similarly, when the second condenser unit 202 is running, only the second fan 402 needs to be turned on. Due to the effect of the fixed partition 600a, the airflow from the second fan 402 only passes through the second condenser unit 202, preventing it from passing through the first condenser unit 201. Therefore, the operating fan is only used for the working condenser, effectively preventing air leakage and improving the energy efficiency of the liquid-cooled unit.

[0081] For the liquid cooling unit described in example (3), the first condensing device 201 and the second condensing device 202 can each be set as one, or they can be set as two or more with their heat dissipation surfaces stacked in opposite directions to improve the heat exchange effect.

[0082] For example (3), the bottom end of the fixed partition 600a can be fixedly connected to the bottom ends of the first condensing device 201 and the second condensing device 202 simultaneously, or the bottom end of the fixed partition 600a can also be fixedly connected to the corresponding bracket through the bottom gap between the first condensing device 201 and the second condensing device 202. The top end of the fixed partition 600a is as close as possible to the fan 400. For example, the projection of the top end of the fixed partition 600a on the surface of the first condensing device 201 or the second condensing device 202 is located at the edge of the first condensing device 201 or the second condensing device 202, especially the non-finned part, to ensure that the airflow passes sufficiently through the corresponding condenser.

[0083] In addition, for example (3), when the first condenser 201 and the second condenser 202 are operating simultaneously under high load cooling demand, the first fan 401 and the second fan 402 are also operating simultaneously, thereby acting on the first condenser 201 and the second condenser 202 without causing interference due to the fixed partition 600a.

[0084] In some examples (4), as shown in the appendix Figure 5 As shown, the partition is a movable partition 600b, which is rotatably arranged, and the pivot of the movable partition 600b is located on the side away from the fan 400 between two heat dissipation surfaces arranged at an angle; the liquid cooling unit also includes a drive mechanism fixedly connected to the movable partition 600b, which is used to drive the movable partition 600b to move to contact the heat dissipation surface of the first condensing device 201 or the heat dissipation surface of the second condensing device 202.

[0085] For the example (4), a movable partition 600b is arranged between the first condenser 201 and the second condenser 202, and the movable partition 600b can swing between the first condenser 201 and the second condenser 202. For example, the initial position of the movable partition 600b can be located in the middle region between the first condenser 201 and the second condenser 202, and the swing angle of the movable partition 600b can be equal to half of the angle of the V-shaped cavity between the first condenser 201 and the second condenser 202, so that the movable partition 600b has two working positions. When the movable partition 600b is in one of the working positions, the movable partition 600b moves to fit the heat dissipation surface of the first condenser 201, so as to block the wind at the heat dissipation surface of the first condenser 201. When the movable partition 600b is in the other working position, the movable partition 600b moves to fit the heat dissipation surface of the second condenser 202, so as to block the wind at the heat dissipation surface of the second condenser 202.

[0086] In this way, when the first condenser 201 is operated in a low-load refrigeration capacity demand condition, the movable partition 600b swings to fit the surface of the second condenser 202 to block the flow of the extracted and discharged air through the non-operating second condenser 202. When the second condenser 202 is operated, the movable partition 600b swings to fit the surface of the first condenser 201 to block the flow of the extracted and discharged air through the non-operating first condenser 201. It can be seen that the fan is only used for the operating condenser, which effectively avoids the air leakage problem and improves the energy efficiency of the liquid cooling unit.

[0087] For the liquid cooling unit of the example (4), the first condenser 201 and the second condenser 202 can each be provided as one, or two or more arranged in a stacked manner with respect to the heat dissipation surfaces, so as to improve the heat exchange effect.

[0088] For the example (4), the fan 400 covers as large an area of the V-shaped cavity between the first condenser 201 and the second condenser 202 as possible. For example, the fan 400 covers an area of the V-shaped cavity that is at least 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98%, 99%, or further 100% of the area of the top opening of the V-shaped cavity, so as to ensure that in a high-load refrigeration capacity demand condition, the air volume provided by the fan 400 can pass through the first condenser 201 and the second condenser 202 simultaneously when the first condenser 201 and the second condenser 202 are operated simultaneously, avoiding the interference caused by the movable partition 600b.

[0089] For example (3), the bottom end of the movable partition 600b can be connected to at least one of the bottom ends of the first condenser 201 and the second condenser 202 through a hinge shaft, and the movable partition 600b is further fixedly connected to a driving mechanism, for example, a driving motor, which drives the movable partition 600b to rotate to swing.

[0090] The top end of the movable partition 600b is as close as possible to the fan 400, for example, the projection of the top end of the movable partition 600b on the surface of the first condenser 201 or the second condenser 202 is located at the edge of the first condenser 201 or the second condenser 202, in particular, the non-finned portion, to ensure that the air volume is sufficient to pass through the heat dissipation surface of the corresponding condenser.

[0091] For any of the liquid cooling units described above, the evaporator 100 involved includes at least two independent evaporation channels, one of which is connected to the first condenser 201, and the other of which is connected to the second condenser 202. The evaporator 100 can be provided as a single evaporator as shown in Figure 4 or Figure 5 The evaporator 100 can also be provided as two independent evaporators, each having one evaporation channel, so that each evaporator is connected to the corresponding condenser based on its evaporation channel (not shown in the figure).

[0092] For any of the liquid cooling units described above, the evaporator 100 can be provided as a single evaporator as shown in Figure 1 The liquid cooling unit provided by the embodiment of the present disclosure can further include two throttling valves 500, one of which is arranged in the pipeline between the evaporator 100 and the first condenser 201, and the other of which is arranged in the pipeline between the evaporator 100 and the second condenser 202.

[0093] In application, the first compressor 301 (the second compressor 302) sucks in the low-temperature and low-pressure refrigerant gas that has been heat-exchanged by the evaporator 100, and the low-temperature and low-pressure refrigerant gas is compressed by the first compressor 301 (the second compressor 302) into high-temperature and high-pressure gas, which is then delivered to the corresponding condenser for cooling and heat release, and becomes medium-temperature and high-pressure liquid in the condenser, and then enters the throttling valve 500 for throttling and pressure reduction, and becomes low-temperature and low-pressure gas-liquid two-phase refrigerant, which is then circulated to the evaporator 100 again to be evaporated and heat-absorbed into low-temperature and low-pressure refrigerant gas, and the process is repeated, so that the refrigerant circulates in the refrigerant circulation loop multiple times.

[0094] For any of the liquid cooling units described above, the evaporator 100 can be provided as a single evaporator as shown in Figure 6As shown, the liquid cooling unit can further include a frame 700 for supporting and positioning a plurality of components in the liquid cooling unit, facilitating integrated arrangement of the liquid cooling unit, and facilitating overall assembly of the liquid cooling unit into the energy storage cabinet.

[0095] In another aspect, the embodiments of the present disclosure provide an energy storage cabinet, as shown in the accompanying drawings. Figure 7 As shown, the energy storage cabinet includes a cabinet 800 and a liquid cooling unit, a battery pack and a liquid cooling plate arranged inside the cabinet 800, wherein the liquid cooling unit is as described above. The liquid cooling plate is used to cool the battery pack, and the liquid cooling medium outlet of the liquid cooling plate is in communication with the water return port of the evaporator 100 in the liquid cooling unit, and the liquid cooling medium inlet of the liquid cooling plate is in communication with the water supply port of the evaporator 100 in the liquid cooling unit.

[0096] The energy storage cabinet provided by the embodiments of the present disclosure has all the advantages of the liquid cooling unit described above, which will not be repeated here. Among them, the liquid cooling unit is used for temperature regulation of the battery pack of the energy storage cabinet, and can perform thermal management for the battery pack, so that the battery pack is maintained in a comfortable temperature zone with high charging and discharging efficiency.

[0097] The liquid cooling unit adopts two independent compression refrigeration modules for refrigeration. After one compression refrigeration module fails, the other compression refrigeration module can operate normally, ensuring that the energy storage cabinet will not be forced to interrupt operation and improving the availability of the energy storage cabinet.

[0098] In some examples, the liquid cooling unit and the battery pack are distributed along the length direction of the cabinet 800, and the liquid cooling unit is located at one end of the cabinet 800 along the length direction. This kind of layout facilitates maintenance and repair of the liquid cooling unit.

[0099] In some examples, the side wall of the cabinet 800 has an air inlet 801, and the top wall of the cabinet 800 has an air outlet 802. The air inlet 801 faces the first condensing device 201 and the second condensing device 202, and the air outlet 802 faces the fan 400 and the opening of the included angle faces the top wall of the cabinet 800.

[0100] The air inlet 801 and the air outlet 802 form a heat dissipation channel. Since the air outlet 802 is arranged on the top wall of the cabinet 800 and the air inlet 801 is arranged on the side wall of the cabinet 800, the energy storage cabinet adopts a side air inlet and top air outlet structure with more smooth airflow organization. Therefore, the energy storage cabinet will not affect the air inlet and outlet when arranged in the application scenario, realizes high-density layout, further reduces the occupied space, and improves the land density.

[0101] The above description is only to facilitate those skilled in the art to understand the technical solutions of the present disclosure, and is not intended to limit the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A liquid cooling unit, characterized by, The liquid cooling unit comprises an evaporator, a first condensing device, a first compressor, a second condensing device, a second compressor and a fan; The evaporator is configured to receive liquid cooling medium output by the first condensing device and the second condensing device, and the first compressor and the second compressor are configured to receive liquid cooling medium output by the evaporator; The heat dissipation surface of the first condensing device and the heat dissipation surface of the second condensing device form an included angle, and the air inlet of the fan is arranged at an opening of the included angle; The first condensing device and the second condensing device each comprise a first channel and a second channel, the first channel of the first condensing device and the first channel of the second condensing device are configured to receive liquid cooling medium output by the first compressor, and the second channel of the first condensing device and the second channel of the second condensing device are configured to receive liquid cooling medium output by the second compressor.

2. The liquid chiller unit of claim 1, wherein, The first condensing device and the second condensing device are each a condenser, and the condenser comprises the first channel and the second channel.

3. The liquid chiller unit of claim 2, wherein, The condenser comprises two input interfaces, one of the two input interfaces is configured to connect the first channel and the first compressor, and the other of the two input interfaces is configured to connect the second channel and the second compressor.

4. The liquid chiller unit of claim 1, wherein, The first condensing device and the second condensing device are each a plurality of condensers, and the plurality of condensers are stacked in opposite directions of the heat dissipation surfaces; The plurality of condensers comprise two condensers, the first channel is located in one of the two condensers, and the second channel is located in the other of the two condensers.

5. The liquid chiller unit of claim 4, wherein, The condenser with the first channel in the first condensing device is closer to the fan than the condenser with the second channel, and the condenser with the second channel in the second condensing device is closer to the fan than the condenser with the first channel. Alternatively, The condenser with the second channel in the first condensing device is closer to the fan than the condenser with the first channel, and the condenser with the first channel in the second condensing device is closer to the fan than the condenser with the second channel.

6. A liquid chiller unit characterized by, The liquid cooling unit comprises an evaporator, a first condensing device, a first compressor, a second condensing device, a second compressor, a fan and a partition plate; The evaporator is configured to receive liquid cooling medium output by the first condensing device and the second condensing device, and the first compressor and the second compressor are configured to receive liquid cooling medium output by the evaporator, the first condensing device is configured to receive liquid cooling medium output by the first compressor, and the second condensing device is configured to receive liquid cooling medium output by the second compressor; The heat dissipation surface of the first condensing device and the heat dissipation surface of the second condensing device form an included angle, and the air inlet of the fan is arranged at an opening of the included angle; The partition plate is located between the two heat dissipation surfaces arranged at an angle to block the two heat dissipation surfaces, wherein the partition plate is used to form a first cavity with the heat dissipation surface of the first condensing device, and the partition plate is used to form a second cavity with the heat dissipation surface of the second condensing device; When one of the first condensing device and the second condensing device is in an operating state, the fan is used to provide all air volume to one of the first cavity and the second cavity.

7. The liquid chiller unit of claim 6, wherein, The partition plate is a fixed partition plate, and the fan includes a first fan and a second fan; The first fan is located at an opening of the first cavity, and the second fan is located at an opening of the second cavity.

8. The liquid chiller unit of claim 6, wherein, The partition plate is a movable partition plate, the movable partition plate is rotationally arranged, and a rotation shaft of the movable partition plate is located on a side away from the fan between the two heat dissipation surfaces arranged at an angle; The liquid cooling unit further includes a driving mechanism fixedly connected to the movable partition plate, and the driving mechanism is used to drive the movable partition plate to be in close contact with the heat dissipation surface of the first condensing device or the heat dissipation surface of the second condensing device.

9. An energy storage cabinet characterized by, The energy storage cabinet includes a box body and a liquid cooling unit, a battery pack and a liquid cooling plate arranged in the box body, wherein the liquid cooling unit is as described in any one of claims 1-8; The liquid cooling plate is used to dissipate heat for the battery pack, a liquid cooling medium outlet of the liquid cooling plate is in communication with a backwater outlet of the evaporator in the liquid cooling unit, and a liquid cooling medium inlet of the liquid cooling plate is in communication with a water supply outlet of the evaporator in the liquid cooling unit.

10. The energy storage cabinet of claim 9, wherein, The side wall of the box body has an air inlet, and the top wall of the box body has an air outlet, the air inlet faces the first condensing device and the second condensing device, the air outlet faces the fan, and the opening of the angle faces the top wall of the box body.

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