Direct cooling system and control method thereof

Abstract

The invention relates to a direct cooling system and a control method of the direct cooling system.The direct cooling system comprises a compressor, a condenser, a heat regeneration assembly, a heat exchange assembly and a throttling element, the heat regeneration assembly is connected with the outlet side of the compressor and the inlet side of the condenser, and the inlet side of at least one heat exchange component is connected with the outlet side of the condenser; the outlet side of the heat exchange assembly is connected with the inlet side of the compressor. The heat regeneration assembly comprises a first heat regeneration part and a second heat regeneration part, and the first heat regeneration part comprises a first flow channel part and a second flow channel part. The second heat regeneration part comprises a third flow channel part and a fourth flow channel part. The first flow path portion connects the outlet side of the compressor and the inlet side of the condenser, and the third flow path portion connects the outlet side of the compressor and the inlet side of the condenser. The first heat regeneration part and the second heat regeneration part can be heat regenerators. And the first flow channel part and the third flow channel part are arranged in parallel. The flow resistance of the direct cooling system can be reduced, the first heat regeneration part and the second heat regeneration part are connected in parallel, and energy consumption can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange, in particular to a direct cooling system and a control method of the direct cooling system. BACKGROUND

[0002] In the field of energy storage heat exchange technology, direct cooling is an important temperature control means. In the related art, in order to improve the temperature uniformity of the direct cooling plate, a regenerator needs to be arranged in the system, which can improve the supercooling degree of the refrigerant. In some scenarios with large refrigeration capacity, multiple regenerators are used. However, in the related art, multiple regenerators are connected in series to increase the regenerative capacity, which greatly increases the flow resistance of the system. SUMMARY

[0003] Therefore, the present application provides a direct cooling system to reduce the flow resistance of the direct cooling system.

[0004] In a first aspect, the embodiments of the present application provide a direct cooling system, which comprises:

[0005] a compressor;

[0006] a condenser;

[0007] a regenerative assembly connected to the outlet side of the compressor and the inlet side of the condenser;

[0008] at least one heat exchange part, the outlet side of the heat exchange part being connected to the inlet side of the compressor;

[0009] a throttling element connected between the condenser and the outlet side of the heat exchange part;

[0010] The regenerative assembly comprises a first regenerative part and a second regenerative part. The first regenerative part comprises a first flow channel part and a second flow channel part. The first flow channel part is connected to the outlet side of the compressor and the inlet side of the condenser. The second flow channel part is connected to the inlet side of the compressor and the outlet side of the heat exchange part. The second regenerative part comprises a third flow channel part and a fourth flow channel part. The third flow channel part is connected to the outlet side of the compressor and the inlet side of the condenser. The fourth flow channel part is connected to the inlet side of the compressor and the outlet side of the heat exchange part. The first flow channel part and the third flow channel part are arranged in parallel.

[0011] By arranging the first flow channel part and the third flow channel part in parallel, the first regenerative part and the second regenerative part are equivalent to being arranged in parallel. By arranging the first regenerative part and the second regenerative part in parallel, the flow resistance of the direct cooling system can be reduced while ensuring the regenerative capacity.

[0012] In a second aspect, the application provides a control method of the direct cooling system, used for controlling the direct cooling system as described above, comprising the following steps:

[0013] measuring suction superheat of the compressor of the direct cooling system;

[0014] when the suction superheat of the compressor is less than or equal to 5℃, the compressor is connected with the first and second heat recovery parts.

[0015] By using the control method, the heat recovery assembly can be controlled, and the heat recovery parts are connected into the direct cooling system according to the requirement, and the first and third flow channel parts are connected in parallel, and the first and second heat recovery parts are equivalent to being connected in parallel, so that the flow resistance of the system can be reduced on the basis of ensuring the heat recovery capacity.

[0016] It should be understood that the foregoing general description and the following detailed description are only exemplary and do not limit the application. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 a schematic diagram of a first embodiment of the direct cooling system provided by the application;

[0019] Figure 2 a schematic diagram of a liquid storage assembly provided by the application;

[0020] Figure 3 a schematic diagram of a gas-liquid separation assembly provided by the application;

[0021] Figure 4 a schematic diagram of a heat exchange assembly provided by the application;

[0022] Figure 5 a schematic diagram of a second embodiment of the direct cooling system provided by the application; Figure 6 a schematic diagram of a control method of the direct cooling system provided by the application.

[0023] LIST OF REFERENCE NUMERALS

[0024] 1-compressor;

[0025] 2-heat recovery assembly;

[0026] 21-first heat recovery part;

[0027] 211 - first flow passage section;

[0028] 211a - first control valve;

[0029] 211b - second control valve;

[0030] 212 - second flow passage section;

[0031] 212a - sixth control valve;

[0032] 212b - seventh control valve;

[0033] 22 - second heat recovery section;

[0034] 221 - third flow passage section;

[0035] 221a - third control valve;

[0036] 221b - fourth control valve;

[0037] 222 - fourth flow passage section;

[0038] 222a - ninth control valve;

[0039] 222b - tenth control valve;

[0040] 3 - condenser;

[0041] 4 - heat exchange assembly;

[0042] 41 - heat exchange section;

[0043] 42 - liquid separator;

[0044] 43 - first flow meter;

[0045] 5 - fifth flow passage section;

[0046] 51 - fifth control valve;

[0047] 6 - sixth flow passage section;

[0048] 61 - eighth control valve;

[0049] 62 - eleventh control valve;

[0050] 7 - liquid storage assembly;

[0051] 71 - first branch;

[0052] 711 - first liquid storage device;

[0053] 712 - twelfth control valve;

[0054] 713 - thirteenth control valve;

[0055] 72 - second branch;

[0056] 721 - second liquid storage device;

[0057] 722 - fourteenth control valve;

[0058] 723 - fifteenth control valve;

[0059] 73 - third branch;

[0060] 731 - sixteenth control valve;

[0061] 8 - gas-liquid separation assembly;

[0062] 81 - fourth branch;

[0063] 811 - first gas-liquid separator;

[0064] 812 - seventeenth control valve;

[0065] 813 - eighteenth control valve;

[0066] 82 - fifth branch;

[0067] 821 - second gas-liquid separator;

[0068] 822 - nineteenth control valve;

[0069] 823 - twentieth control valve;

[0070] 83 - sixth branch;

[0071] 831 - twenty-first control valve;

[0072] 9 - temperature and pressure sensor;

[0073] 10 - drying filter;

[0074] 20 - second flow meter;

[0075] 30 - liquid sight glass;

[0076] 40 - oil separator;

[0077] 50 - throttling element. DETAILED DESCRIPTION

[0078] For better understanding of the technical scheme of the present application, the embodiments of the present application are described in detail below in combination with the drawings.

[0079] It should be clear that the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other technical schemes obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0080] 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.

[0081] 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.

[0082] like Figure 1 As shown in the figure, this application provides a direct cooling system, which includes a compressor 1, a condenser 3, a regenerator assembly 2, a heat exchange assembly 4, and a throttling element 50. The regenerator assembly 2 is connected to the outlet side of the compressor 1 and the inlet side of the condenser 3. The heat exchange assembly 4 includes at least one heat exchange section 41, which can be a cold plate or other component. The inlet side of the heat exchange assembly 4 is connected to the outlet side of the condenser 3, and the outlet side of the heat exchange assembly 4 is connected to the inlet side of the compressor 1. The throttling element 50 is connected between the condenser 3 and the heat exchange section 41. The regenerator assembly 2 includes a first regenerator section 21 and a second regenerator section 22. The first regenerator section 21 includes a first flow channel section 211 and a second flow channel section 212, and the medium in the first flow channel section 211 and the medium in the second flow channel section 212 can exchange heat. The second regenerator section 22 includes a third flow channel section 221 and a fourth flow channel section 222, and the medium in the third flow channel section 221 and the medium in the fourth flow channel section 222 can exchange heat. The first flow channel 211 connects the outlet side of the compressor 1 to the inlet side of the condenser 3; the second flow channel 212 connects the inlet side of the compressor 1 to the outlet side of the heat exchange assembly 4; the third flow channel 221 connects the outlet side of the compressor 1 to the inlet side of the condenser 3; and the fourth flow channel 222 connects the inlet side of the compressor 1 to the outlet side of the heat exchange assembly 4. That is, the first flow channel 211 and the third flow channel 221 are connected to the exhaust side of the compressor 1, and the second flow channel 212 and the fourth flow channel 222 are connected to the suction side of the compressor 1. The medium flowing out of the compressor 1 can exchange heat with the medium flowing into the compressor 1 in the regenerator assembly 2. The first regenerator 21 and the second regenerator 22 can be regenerators. The first flow channel 211 and the third flow channel 221 are arranged in parallel.

[0083] Taking the first regenerating section 21 as an example, during operation, the medium becomes a high-temperature and high-pressure state after passing through the compressor 1. It enters the first flow channel section 211 from the outlet side of the compressor 1 and exchanges heat with the medium at the inlet side of the compressor 1, i.e., the medium located in the second flow channel section 212. The medium in the second flow channel section 212 absorbs heat and has a certain degree of superheat. It enters the compressor 1 along the inlet of the compressor 1. The medium in the first flow channel section 211 releases heat, its temperature decreases, and it flows to the condenser 3. After being condensed by the condenser 3, it enters the heat exchange assembly 4. Due to the subcooling effect of the regenerator, the medium temperature is even lower, and more liquid medium enters the heat exchange assembly 4. When the medium flows out of the heat exchange assembly 4, the superheat is low, and there is a lot of liquid refrigerant. This ensures that the heat exchange section 41 always maintains a gas-liquid two-phase state, which is beneficial to improving temperature uniformity. However, the presence of liquid refrigerant at this time will cause the compressor 1 to have a greater risk of liquid slugging. When the compressor 1 draws in liquid medium, liquid slugging will generate a great impact force on the compressor 1, causing damage to the internal components of the compressor 1. Meanwhile, the lubricating oil containing a large amount of liquid medium has low viscosity, which prevents it from forming a sufficient oil film on the friction surface. This leads to accelerated wear of the moving parts inside the compressor 1, affecting the service life of the compressor 1. Moreover, the liquid medium will boil when heated during transportation, which will also affect the normal transportation of the lubricating oil. Therefore, after the medium flows out of the heat exchange assembly 4, it can enter the second flow channel 212 and / or the fourth flow channel 222, and exchange heat with the other flow channel of the corresponding heat exchange part 41. That is, the medium can flow into the second flow channel 212 to exchange heat with the medium in the first flow channel 211, and / or the medium can flow into the fourth flow channel 222 to exchange heat with the medium in the third flow channel 221. After heat exchange, it flows to the inlet side of the compressor 1. This method allows the first flow channel 211 and the third flow channel 221 to heat the medium on the inlet side of the compressor 1, giving the medium on the inlet side a higher degree of superheat. This, in turn, allows the medium on the inlet side of the compressor 1 to vaporize more fully, reducing the risk of liquid slugging in the compressor 1 and improving the safety and stability of the direct cooling system.

[0084] It should be noted that the inlet and outlet sides of the heat exchange section 41 are not fixed and need to be flexibly determined according to the relative position of the compressor 1. The outlet side of the compressor 1 is the high-pressure side, and the inlet side of the compressor 1 is the low-pressure side. For the same heat exchange component 4, among the two interfaces of the same flow channel section, the interface that first connects to the outlet side of the compressor 1 is the inlet, and the other is the outlet. In one possible implementation, the regenerator can be a coaxial tube or shell-and-tube type heat exchange section 41, etc.

[0085] The throttling element 50 can be an electronic expansion valve, capillary tube, or other components used to control the flow rate of the heat exchange section 41. The first flow channel 211 of the first regenerating section 21 and the third flow channel 221 of the second regenerating section 22 are connected in parallel, that is, the medium flowing out from the outlet side of the compressor 1 can enter the first flow channel 211 of the first regenerating section 21 or the third flow channel 221 of the second regenerating section 22.

[0086] The solution provided in this application embodiment, by connecting the first regenerating section 21 and the second regenerating section 22 of the regenerating assembly 2 in parallel, can improve the subcooling of the medium flowing through the regenerating assembly 2. Furthermore, the parallel connection allows the first regenerating section 21 and the second regenerating section 22 to operate relatively independently; if one fails, the other can still function, thus reducing the impact of regenerating section damage on the direct cooling system. The parallel connection of the first regenerating section 21 and the second regenerating section 22 increases the flow path of the medium, which is beneficial for improving the overall flow efficiency. The two regenerating sections can operate simultaneously, resulting in higher overall efficiency of the regenerating assembly 2. Compared to connecting the first regenerating section 21 and the second regenerating section 22 in series, connecting them in parallel results in relatively lower flow resistance of the medium, which is beneficial for improving the efficiency of the direct cooling system. By connecting the first flow channel section and the third flow channel section in parallel, the first and second regenerating sections are essentially connected in parallel, thereby reducing the system's flow resistance while ensuring regeneration capacity. When multiple regenerating sections are used simultaneously, the series connection in related technologies leads to a significant increase in system resistance, a higher compressor load, and a relative increase in energy consumption. In contrast, the parallel connection significantly reduces flow resistance, improves the system's energy efficiency ratio, and saves energy while ensuring regeneration performance.

[0087] It should be noted that the connection between the components involved in the embodiments of this application can be by means of pipeline connection, etc. The interconnected components can be directly connected by pipeline, etc., or other components can be provided between the interconnected components and indirectly connected by pipeline.

[0088] In one possible implementation, the first regenerating section 21 is connected to a control valve, and / or the second regenerating section 22 is connected to a control valve.

[0089] By installing control valves in the first regenerating section 21 and / or the second regenerating section 22, the state of the first regenerating section 21 and the second regenerating section 22 can be controlled. The connection scheme of the direct cooling system can be adjusted according to the usage requirements, and the number of regenerating sections connected to the direct cooling system can be selected, making the direct cooling system more flexible and adaptable to different needs.

[0090] In one possible implementation, the direct cooling system may include a first state, a second state, and a third state. When the direct cooling system is in the first state, the control valve connecting the first regenerator 21 and the control valve connecting the second regenerator 22 are open, and the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 through the first flow channel 211 and the third flow channel 221. When the direct cooling system is in the second state, the control valve connecting the first regenerator 21 is open, the control valve connecting the second regenerator 22 is closed, and the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 through the first flow channel 211. When the direct cooling system is in the third state, the control valve connecting the first regenerator 21 is closed, the control valve connecting the second regenerator 22 is open, and the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 through the third flow channel 221.

[0091] By adjusting the state of the control valves, the on / off state of each flow channel can be controlled accordingly, thereby adjusting the state of the direct cooling system so that the corresponding regenerator section can be connected, thus changing the architecture of the direct cooling system to meet different needs.

[0092] like Figure 1 As shown, in one possible implementation, the first flow channel 211 is provided with a control valve and / or the third flow channel 221 is provided with a control valve. The control valve is used to control the opening and closing of the corresponding flow channel.

[0093] When the control valve of the first flow channel 211 is opened and the control valve of the third flow channel 221 is opened, the direct cooling system is in the first state, and the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 through the first flow channel 211 and the third flow channel 221.

[0094] When the control valve of the first flow channel 211 is opened and the control valve of the third flow channel 221 is closed, the direct cooling system is in the second state, and the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 through the first flow channel 211.

[0095] When the control valve of the first flow channel 211 is closed and the control valve of the third flow channel 221 is open, the direct cooling system is in the third state, and the outlet of the compressor 1 is connected to the inlet side of the condenser 3 through the third flow channel 221.

[0096] When the control valve of the first flow channel 211 is closed and the control valve of the third flow channel 221 is closed, the outlet side of the compressor 1 is not connected to the inlet side of the condenser 3 through the first flow channel 211 and the third flow channel 221.

[0097] By installing control valves in the first flow channel section 211 and the third flow channel section 221 respectively, the on / off state of the first flow channel section 211 and the third flow channel section 221 can be controlled. In actual use, the operating state of the first regenerator section 21 and the second regenerator section 22 can be selected according to requirements. The first regenerator section 21 and the second regenerator section 22 can both operate simultaneously, or only one can operate. When the regenerator is not needed, the control valves of the first flow channel section 211 and the second flow channel section 212 can be closed, thereby shutting down both the first regenerator section 21 and the second regenerator section 22. This design makes the overall operation of the direct cooling system more flexible, and the overall scheme of the direct cooling system can be adjusted according to requirements.

[0098] Typically, when a direct cooling system is poorly matched or its performance is substandard, the design needs to be adjusted by replacing, adding, or removing components, requiring multiple modifications. Each adjustment necessitates operations such as releasing refrigerant, vacuuming, pressurizing, and refilling, which is not only time-consuming and material-intensive, impacting the development cycle, but also increasing development costs. The solution provided in this application allows for adjusting the operation of the direct cooling system by regulating the state of a control valve. This control valve can be a ball valve or similar adjustable valve. During use, the opening and closing states of the control valve can be adjusted to control the operating state of components in the direct cooling system. Furthermore, adjusting the opening of the ball valve can control the flow rate of the medium, allowing for further adjustments to the direct cooling system, improving control precision, and enabling the system to meet more application requirements. This reduces the number of system modifications, minimizes media waste, improves testing efficiency, and lowers development costs.

[0099] In one possible implementation, the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 via a fifth flow channel 5, and the fifth flow channel 5 is connected to a control valve.

[0100] Compressor 1 can be directly connected to condenser 3 without going through a regenerator section. This makes the structure of the direct cooling system more flexible, allowing the number of regenerator sections connected in the direct cooling system to be controlled according to needs, thereby changing the architecture of the direct cooling system and enabling it to adapt to different requirements.

[0101] like Figure 1 As shown, in one possible embodiment, the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 via a fifth flow channel 5, which is equipped with a control valve. When the control valve of the fifth flow channel 5 is open, the outlet side of the compressor 1 is connected to the inlet side of the condenser 3 via the fifth flow channel 5. When the control valve of the fifth flow channel 5 is closed, the outlet side of the compressor 1 is not connected to the inlet side of the condenser 3 via the fifth flow channel 5.

[0102] This design allows the compressor 1 to connect to the inlet side of the condenser 3 through the fifth flow channel 5, and the fifth flow channel 5 to be connected in parallel with the first and third pipes of the regenerator assembly 2. When the regenerator assembly 2 is not needed, the control valve of the regenerator assembly 2 can be closed and the control valve of the fifth flow channel 5 can be opened, so that the medium does not pass through the regenerator assembly 2 and directly enters the condenser 3 along the fifth flow channel 5. This makes the overall operation of the direct cooling system more flexible, and the working state of the regenerator can be selected according to the needs.

[0103] In the solution provided in this application embodiment, the first flow channel section 211, the third flow channel section 221, and the fifth flow channel section 5 are all arranged in parallel, and each is equipped with a control valve, which can be a ball valve or other components. During use, the opening and closing of each channel can be controlled by adjusting the opening and closing of the ball valves located in each flow channel section according to requirements, allowing the medium to flow to the first flow channel section 211, the third flow channel section 221, and the fifth flow channel section 5 as needed. Simultaneously, the flow rate of each flow channel section can be controlled by adjusting the opening degree of each control valve, making the operation of the direct cooling system more flexible and adaptable to different scenario requirements.

[0104] like Figure 1 As shown, in one possible embodiment, the first flow channel section 211 is provided with a first control valve 211a and a second control valve 211b. The first control valve 211a is located on the inlet side of the first flow channel section 211, and the second control valve 211b is located on the outlet side of the first flow channel section 211. That is, the first control valve 211a is located at the end of the first flow channel section 211 near the compressor 1, and the second control valve 211b is located at the end of the first flow channel section 211 near the condenser 3. The third flow channel section 221 is provided with a third control valve 221a and a fourth control valve 221b. The third control valve 221a is located on the inlet side of the third flow channel section 221, and the fourth control valve 221b is located on the outlet side of the third flow channel section 221. That is, the third control valve 221a is located at the end of the third flow channel section 221 near the compressor 1, and the fourth control valve 221b is located at the end of the third flow channel section 221 near the condenser 3. The fifth flow channel section 5 is provided with a fifth control valve 51.

[0105] By providing a first control valve 211a and a second control valve 211b in the first flow channel section 211, the opening and closing of the first flow channel section 211 can be controlled, as can the flow rate of the medium flowing into and out of the first flow channel section 211. By providing a third control valve 221a and a fourth control valve 221b in the third flow channel section 221, the opening and closing of the third flow channel section 221 can be controlled, as can the flow rate of the medium flowing into and out of the third flow channel section 221. By providing a fifth control valve 51 in the fifth flow channel section 5, the opening and closing of the fifth flow channel section 5 can be easily controlled.

[0106] In use, the first control valve 211a controls the flow rate of the medium into the first flow channel 211, the third control valve 221a controls the flow rate of the medium into the third flow channel 221, the second control valve 211b controls the flow rate of the medium out of the first flow channel 211, and the fourth control valve 221b controls the flow rate of the medium out of the third flow channel 221. In practical use, by controlling the flow rates of the medium in the first and third flow channels 221, the medium in the first flow channel 211 can fully exchange heat with the medium in the second flow channel 212, and the medium in the third flow channel 221 can fully exchange heat with the medium in the fourth flow channel 222. This improves the heat exchange efficiency of the regenerator assembly 2, thereby reducing the possibility of liquid slugging in the compressor 1.

[0107] like Figure 1 As shown, in one possible implementation, the second flow channel section 212 is provided with a sixth control valve 212a and a seventh control valve 212b. The sixth control valve 212a is located on the inlet side of the second flow channel section 212, and the seventh control valve 212b is located on the outlet side of the second flow channel section 212. That is, the sixth control valve 212a is located at the end of the second flow channel section 212 near the heat exchange assembly 4, and the seventh control valve 212b is located at the end of the second flow channel section 212 near the compressor 1.

[0108] This design allows for control of the inlet and outlet sides of the second flow channel 212. After the medium flows out of the compressor 1, passes through the condenser 3 and the heat exchange assembly 4, the medium can flow back to the compressor 1 through the second flow channel 212. The sixth control valve 212a and the seventh control valve 212b can control the flow rate of the medium inflow and outflow.

[0109] When the direct cooling system is running, the flow rate of the medium in the second flow channel 212 can be controlled by adjusting the opening of the control valve, so that the medium in the second flow channel 212 can fully exchange heat with the medium in the first flow channel 211, which is beneficial to the heat absorption and evaporation of the medium in the second flow channel 212 and reduces the possibility of liquid slugging in the compressor 1.

[0110] like Figure 1 As shown, in one possible implementation, the outlet side of the heat exchange assembly 4 is connected to the inlet side of the compressor 1 via a sixth flow channel 6, and the sixth flow channel 6 is provided with an eighth control valve 61. The inlet and outlet sides of the second flow channel 212 are both connected to the sixth flow channel 6, and the inlet side of the second flow channel 212 is connected to the inlet side of the eighth control valve 61, and the outlet side of the second flow channel 212 is connected to the outlet side of the eighth control valve 61.

[0111] The sixth flow channel 6 can be connected in parallel with the second flow channel 212. The eighth control valve 61 is used to control the opening and closing of the sixth flow channel 6. The medium flowing out of the heat exchange assembly 4 can flow into the second flow channel 212 and / or the sixth flow channel 6 depending on the on / off status of the second flow channel 212 and the sixth flow channel 6.

[0112] When the sixth control valve 212a and / or the seventh control valve 212b are closed, that is, when the second flow channel 212 is closed, the eighth control valve 61 can be opened, and the medium flowing out of the heat exchange assembly 4 can flow into the compressor 1 through the sixth flow channel 6.

[0113] When the sixth control valve 212a and the seventh control valve 212b are open and the eighth control valve 61 is closed, the medium flowing out of the heat exchange assembly 4 can flow into the compressor 1 through the second flow channel 212.

[0114] When the sixth control valve 212a, the seventh control valve 212b and the eighth control valve 61 are all open, the medium flowing out of the heat exchange assembly 4 can flow directly into the compressor 1 along the sixth flow channel 6, and flow into the compressor 1 after passing through the second flow channel 212.

[0115] This design allows for more flexible application of the direct cooling system, enabling the use of the first regenerating section 21 to be adjusted according to different usage requirements, thus allowing the direct cooling system to meet various application needs.

[0116] like Figure 1 As shown, in one possible implementation, the fourth flow channel section 222 is provided with a ninth control valve 222a and a tenth control valve 222b. The ninth control valve 222a can be located on the inlet side of the fourth flow channel section 222, and the tenth control valve 222b can be located on the outlet side of the fourth flow channel section 222. That is, the ninth control valve 222a can be located at the end of the fourth flow channel section 222 near the heat exchange assembly 4, and the tenth control valve 222b can be located at the end of the fourth flow channel section 222 near the compressor 1.

[0117] This design allows for control of the inlet and outlet sides of the fourth flow channel 222. After the medium flows out of the compressor 1 and passes through the condenser 3 and the heat exchange assembly 4, the medium can flow back to the compressor 1 through the fourth flow channel 222. The ninth control valve 222a and the tenth control valve 222b can control the flow rate of the medium inflow and outflow.

[0118] When the direct cooling system is running, the flow rate of the medium in the second flow channel 212 can be controlled by adjusting the opening of the control valve, so that the medium in the fourth flow channel 222 can fully exchange heat with the medium in the third flow channel 221, which is beneficial to the heat absorption and evaporation of the medium in the fourth flow channel 222 and reduces the possibility of liquid slugging in the compressor 1.

[0119] likeFigure 1 As shown, in one possible implementation, the outlet side of the heat exchange assembly 4 is connected to the inlet side of the compressor 1 via a sixth flow channel 6, and the sixth flow channel 6 is provided with an eleventh control valve 62. The inlet and outlet sides of the fourth flow channel 222 are both connected to the sixth flow channel 6, and the inlet side of the fourth flow channel 222 is connected to the inlet side of the eleventh control valve 62, while the outlet side of the fourth flow channel 222 is connected to the outlet side of the eleventh control valve 62.

[0120] The sixth flow channel section 6 can be connected in parallel with the fourth flow channel section 222, and the eleventh control valve 62 is used to control the opening and closing of the sixth flow channel section 6. The medium flowing out of the heat exchange assembly 4 can flow into the fourth flow channel section 222 and / or the sixth flow channel section 6 depending on the on / off state of the two sections. The medium can flow directly into the compressor 1 through the sixth flow channel section 6, or it can flow into the compressor 1 after passing through the fourth flow channel section 222.

[0121] When the ninth control valve 222a and / or the tenth control valve 222b are closed, that is, when the fourth flow channel 222 is closed, the eleventh control valve 62 can be opened, and the medium flowing out of the heat exchange assembly 4 can flow into the compressor 1 through the sixth flow channel 6.

[0122] When the ninth control valve 222a and the tenth control valve 222b are open and the eleventh control valve 62 is closed, the medium flowing out of the heat exchange assembly 4 can flow into the compressor 1 through the fourth flow channel 222.

[0123] When the ninth control valve 222a, the tenth control valve 222b and the eleventh control valve 62 are all open, the medium flowing out from the heat exchange assembly 4 can partially flow into the compressor 1 along the sixth flow channel 6, and partially enter the fourth flow channel 222 and then flow into the compressor 1 after heat exchange.

[0124] This design allows for more flexible application of the direct cooling system, enabling the use of the second regenerator 22 to be adjusted according to different usage requirements, thus allowing the direct cooling system to meet various application needs.

[0125] like Figure 1As shown, in one possible implementation, the outlet and inlet sides of the second flow channel 212 are located at opposite ends of the eighth control valve 61, and the outlet and inlet sides of the fourth flow channel 222 are located at opposite ends of the eleventh control valve 62. The medium flowing out of the heat exchange assembly 4 can first flow into the sixth flow channel 6. When the medium passes through the connection position between the fourth flow channel 222 and the sixth flow channel 6, depending on the opening and closing states of the ninth control valve 222a, the tenth control valve 222b, and the eleventh control valve 62, the medium can continue to flow along the sixth flow channel 6, or it can flow into the fourth flow channel 222 and exchange with the medium in the third flow channel 221. The medium flowing out of the fourth flow channel 222 re-flows into the sixth flow channel 6 from the outlet side of the fourth flow channel 222, and continues to flow towards the connection position between the inlet side of the second flow channel 212 and the sixth flow channel 6. Depending on the opening and closing states of the sixth control valve 212a, the seventh control valve 212b and the eighth control valve 61, the medium can continue to flow along the sixth flow channel 6 to the compressor 1, or flow into the second flow channel 212, exchange heat with the medium in the first flow channel 211, and then flow along the outlet side of the second flow channel 212 into the sixth flow channel 6 and then into the compressor 1.

[0126] This design allows the first regenerator section 21 and the second regenerator section 22 to be connected in parallel with the sixth flow channel section 6. The state of each control valve can be adjusted according to actual usage requirements to direct the medium to the corresponding flow channel section. That is, during recirculation, the medium can either flow directly into the compressor 1 as needed, or it can undergo heat exchange through the first regenerator section 21 and / or the second regenerator section 22 before flowing into the compressor 1. This design makes the direct cooling system more flexible and adaptable to different usage needs. The use of the regenerator can be adjusted by regulating the opening and closing states of the control valves. During use, there is no need to disassemble or reassemble the components of the direct cooling system, making operation simple and efficient.

[0127] like Figure 1 As shown, in one possible implementation, the direct cooling system may further include a liquid storage assembly 7, which is connected to the outlet side of the condenser 3 and the inlet side of the heat exchange assembly 4. Figure 2As shown. The liquid storage assembly 7 may include a first branch 71, a second branch 72, and a third branch 73. The first branch 71 connects the outlet side of the condenser 3 and the inlet side of the heat exchange assembly 4, and is equipped with a first liquid storage device 711 and at least one control valve. The second branch 72 connects the outlet side of the condenser 3 and the inlet side of the heat exchange assembly 4, and is equipped with a second liquid storage device 721 and at least one control valve. The third branch 73 connects the outlet side of the condenser 3 and the inlet side of the heat exchange section 41, and is equipped with a control valve. The first branch 71, the second branch 72, and the third branch 73 are arranged in parallel and controlled by corresponding control valves. When the medium flows out of the condenser 3, the opening and closing states of each control valve can be adjusted as needed to allow the medium to flow into the corresponding branch.

[0128] The first liquid storage device 711 and the second liquid storage device 721 can be liquid storage tanks. These devices are used to store liquid media. The media flowing from the compressor 1 becomes liquid after passing through the condenser 3. The liquid media can be directed to the corresponding liquid storage device as needed, thereby adjusting the pressure of the direct cooling system to meet different usage requirements. When pressure adjustment of the direct cooling system is required, the media can flow into the first branch 71 and / or the second branch 72 as needed. When pressure adjustment is not required, the media can flow into the third branch 73.

[0129] In one possible implementation, the first liquid storage device 711 and the second liquid storage device 721 can be liquid storage tanks of different capacities. The first branch 71 is equipped with a twelfth control valve 712 and a thirteenth control valve 713; the second branch 72 is equipped with a fourteenth control valve 722 and a fifteenth control valve 723; and the third branch 73 is equipped with a sixteenth control valve 731. The twelfth control valve 712 is located on the inlet side of the first liquid storage device 711, and the thirteenth control valve 713 is located on the outlet side of the first liquid storage device 711. The fourteenth control valve 722 is located on the inlet side of the second liquid storage device 721, and the fifteenth control valve 723 is located on the outlet side of the second liquid storage device 721. The sixteenth control valve 731 is used to control the opening and closing of the third branch 73.

[0130] When the medium flows out of condenser 3, the flow can be directed to the corresponding branch by controlling the opening and closing of each control valve, and the pressure can be adjusted as needed via the liquid storage device. Adjusting the opening degree of the control valves also controls the flow rate of the medium, ensuring the pressure of the direct cooling system meets the requirements. When the pressure of the direct cooling system needs to be adjusted, the corresponding control valve of the liquid storage component 7 can be adjusted without adding or removing components from the direct cooling system, making operation more convenient and improving the overall adaptability and flexibility of the direct cooling system.

[0131] Figure 2In the scheme shown, there are two liquid storage devices. The liquid storage component 7 can also be connected in parallel with more branches to connect more liquid storage devices. The liquid storage devices can also include a third liquid storage device, a fourth liquid storage device, and a fifth liquid storage device, etc.

[0132] like Figure 1 As shown, in one possible implementation, the direct cooling system includes a gas-liquid separation assembly 8, which is connected to the outlet side of the heat exchange assembly 4 and the inlet side of the compressor 1. Figure 3 As shown, the gas-liquid separation assembly 8 includes a fourth branch 81, a fifth branch 82, and a sixth branch 83. The fourth branch 81 connects the outlet side of the heat exchange assembly 4 and the inlet side of the compressor 1, and is equipped with a first gas-liquid separator 811 and at least one control valve. The fifth branch 82 connects the outlet side of the heat exchange assembly 4 and the inlet side of the compressor 1, and is equipped with a second gas-liquid separator 821 and at least one control valve. The sixth branch 83 connects the outlet side of the heat exchange assembly 4 and the inlet side of the compressor 1, and is also equipped with at least one control valve. The fourth branch 81, fifth branch 82, and sixth branch 83 are arranged in parallel.

[0133] The medium flowing out of the heat exchange section 41 is usually in a gas-liquid mixed state. Directly flowing into the compressor 1 poses a significant risk of liquid slugging. Therefore, a gas-liquid separation component 8 can be installed to separate the gas and liquid before the medium flows into the compressor 1, thereby reducing the possibility of liquid medium flowing into the compressor 1 and thus reducing the possibility of liquid slugging in the compressor 1. The operating status of the gas-liquid separation component 8 can be adjusted by regulating the control valves of each branch, allowing the first gas-liquid separator 811 and the second gas-liquid separator 821 to operate as needed. When gas-liquid separation is not required, the medium can flow to the compressor 1 through the sixth branch 83.

[0134] like Figure 3 As shown, in one possible implementation, the fourth branch 81 is equipped with a seventeenth control valve 812 and an eighteenth control valve 813. The seventeenth control valve 812 is located on the inlet side of the first gas-liquid separator 811, and the eighteenth control valve 813 is located on the outlet side of the first gas-liquid separator 811. The fifth branch 82 is equipped with a nineteenth control valve 822 and a twentieth control valve 823. The nineteenth control valve 822 is located on the inlet side of the second gas-liquid separator 821, and the twentieth control valve 823 is located on the outlet side of the second gas-liquid separator 821. The sixth branch 83 is equipped with a twenty-first control valve 831.

[0135] When the seventeenth control valve 812 and the eighteenth control valve 813 are open, the medium can flow to the compressor 1 through the first gas-liquid separator 811. When the nineteenth control valve 822 and the twentieth control valve 823 are open, the medium can flow to the compressor 1 through the second gas-liquid separator 821. When the twenty-first control valve 831 is open, the medium can flow directly to the compressor 1 along the sixth branch 83 without passing through the gas-liquid separator.

[0136] This design allows for greater flexibility in the overall application of the direct cooling system, enabling users to choose whether to use a gas-liquid separator and the number of gas-liquid separators to activate, based on their specific needs. Figure 3 In the scheme shown, the gas-liquid separation component 8 includes two gas-liquid separators. The gas-liquid separation component 8 can be connected in parallel with more branches to set more gas-liquid separators. The gas-liquid separation component 8 may also include a third gas-liquid separator, a fourth gas-liquid separator, a fifth gas-liquid separator, etc.

[0137] like Figure 1 As shown, in one possible implementation, the gas-liquid separation assembly 8 can be disposed between the second flow channel 212 and the fourth flow channel 222. The medium can pass through the second regenerating section 22 for heat exchange before flowing into the gas-liquid separation assembly 8 for gas-liquid separation. After gas-liquid separation, it flows into the second flow channel 212, passes through the first regenerating section 21 for heat exchange, and then flows into the compressor 1. In other implementations, the gas-liquid separation assembly 8 can also be disposed between the heat exchange assembly 4 and the regenerating assembly 2, that is, the gas-liquid separation assembly 8 can be disposed between the inlet side of the fourth flow channel 222 and the outlet side of the heat exchange assembly 4. After the medium flows out of the heat exchange assembly 4, it first enters the gas-liquid separator, then enters the fourth flow channel 222 and / or the second flow channel 212 for heat exchange, or flows directly into the compressor 1 along the sixth flow channel 6. The gas-liquid separation assembly 8 can also be disposed between the regenerating assembly 2 and the compressor 1, for example, between the outlet side of the second flow channel 212 and the inlet side of the compressor 1. After the medium undergoes heat exchange through the regenerator 2, it is separated into gas and liquid before entering the compressor 1. The specific location of the gas-liquid separation component 8 can be selected according to actual needs.

[0138] like Figure 4 As shown, in one possible implementation, the heat exchange assembly 4 includes a distributor 42 and at least two heat exchange sections 41. The outlet side of the distributor 42 is connected to the inlet of each heat exchange section 41. Each heat exchange section 41 has a throttling element 50 and a first flow meter 43 at its inlet side. The number of heat exchange sections 41 can be two, three, four, five, six, or more, and each heat exchange section 41 is correspondingly equipped with a throttling element 50 and a first flow meter 43. The throttling element 50 can be an electronic expansion valve. Figure 4 In the scheme shown, the heat exchange assembly 4 includes five heat exchange sections 41.

[0139] By setting up the distributor 42, the medium can be easily distributed to each heat exchange section 41, which is beneficial for the uniform distribution of the medium in the heat exchange assembly 4, improving the utilization rate and heat exchange efficiency of the heat exchange section 41, and also effectively controlling the uniformity of the surface temperature difference of each heat exchange section 41. The throttling element 50 can adjust the opening degree to control the flow rate of the medium in each branch of the heat exchange section 41. The first flow meter 43 is used to count the flow rate of the corresponding branch in order to understand the relevant information of the corresponding branch.

[0140] like Figure 1 As shown, in one possible implementation, the direct cooling system includes at least one temperature and pressure sensor 9, which is used to detect the temperature and pressure at corresponding locations. The locations where the temperature and pressure sensor 9 is installed include, but are not limited to, the inlet and outlet sides of the compressor 1, the inlet and outlet sides of the condenser 3, the inlet and outlet sides of the throttling element 50, and the inlet and outlet sides of the heat exchange section 41, to detect the temperature and pressure at the outlet side and / or the temperature and pressure at the inlet side of at least one of the components: the compressor 1, the condenser 3, and the heat exchange section 41.

[0141] This design facilitates the monitoring of the operating status of the direct cooling system, allowing for an understanding of the temperature and pressure of the medium during operation, thus enabling adjustments to the system.

[0142] like Figure 1 As shown, in one possible implementation, the direct cooling system may include at least one of a dryer filter 10, a second flow meter 20, and a sight glass 30. The dryer filter 10 may be disposed between the outlet side of the condenser 3 and the inlet side of the heat exchange assembly 4, and the dryer filter 10 can filter impurities in the medium. The second flow meter 20 is located on the inlet side of the heat exchange assembly 4 and is used to detect the overall flow rate of the heat exchange assembly 4. The sight glass 30 may be disposed between the outlet side of the condenser 3 and the inlet side of the heat exchange assembly 4, and / or, the sight glass 30 may be located between the outlet side of the heat exchange assembly 4 and the inlet side of the compressor 1. By providing the sight glass 30, the condition of the pipeline can be easily observed and judged, improving the accuracy of the judgment, facilitating adjustments to the direct cooling system, and better meeting actual usage requirements.

[0143] like Figure 5 As shown, in one possible implementation, the direct cooling system may further include an oil separator 40, which may be located between the outlet side of the compressor 1 and the inlet side of the condenser 3. The oil separator 40 can separate the lubricating oil in the high-pressure steam discharged from the compressor 1 during direct cooling, effectively ensuring the safe and efficient operation of the direct cooling system.

[0144] Based on the direct cooling systems provided in the above embodiments, this application also provides a control method for the direct cooling system, which can be applied to the direct cooling system in any of the above embodiments. The control method includes:

[0145] The suction superheat of compressor 1 in the direct cooling system is measured. When the suction superheat is less than or equal to 5°C, compressor 1 is connected to the first regenerating section 21 and the second regenerating section 22.

[0146] By connecting the first regenerating section 21 and the second regenerating section 22, the suction superheat of the compressor 1 can be adjusted, thereby reducing the possibility of liquid slugging in the compressor.

[0147] Before connecting compressor 1 to the first regenerator section 21 and the second regenerator section 22, when the suction superheat of compressor 1 in the direct cooling system is less than or equal to 5°C, the control method further includes:

[0148] The suction superheat of compressor 1 in the direct cooling system is measured. When the suction superheat of compressor 1 is less than or equal to 5°C, the compressor is connected to the first regenerating section 21 or the second regenerating section 22.

[0149] In use, the number of connected regenerator sections can be selected according to the actual situation. One regenerator section can be connected initially. If the suction superheat of compressor 1 is still insufficient after connecting one regenerator section, then another regenerator section can be connected. This design reduces the increased flow resistance of the medium in the refrigeration system, which would otherwise affect flow efficiency, due to a large number of connected regenerator sections in the direct cooling system.

[0150] like Figure 6 As shown, in one possible implementation, the control method may include:

[0151] S1. Measure the suction superheat of compressor 1.

[0152] S11. When the suction superheat of compressor 1 is greater than 5°C, the direct cooling system meets the requirements.

[0153] After step S11, step S2 can be performed:

[0154] S2. Measure the suction superheat of compressor 1.

[0155] S21. When the suction superheat of compressor 1 is less than or equal to 5°C, compressor 1 is connected to the first regenerating section 21 or the second regenerating section 22.

[0156] S22. When the suction superheat of compressor 1 is greater than 5°C, the direct cooling system meets the requirements.

[0157] After step S21, step S3 can be performed: S3, measure the suction superheat of compressor 1.

[0158] S31. When the suction superheat of compressor 1 is less than or equal to 5°C, compressor 1 is simultaneously connected to the first regenerating section 21 and the second regenerating section 22.

[0159] S32. When the suction superheat of compressor 1 is greater than 5°C, the direct cooling system meets the requirements.

[0160] Suction superheat refers to the temperature difference between the actual temperature of the medium when it reaches the suction port of compressor 1 through the return pipe and its corresponding saturation temperature (i.e., the evaporation temperature at suction pressure). Generally, when the suction superheat of compressor 1 is greater than 5°C, the medium drawn into compressor 1 can be considered gaseous, and the direct cooling system meets the requirements. When the suction superheat of compressor 1 is less than or equal to 5°C, the medium drawn into compressor 1 can be considered a gas-liquid mixture, which is prone to liquid slugging, leading to damage to compressor 1, and the direct cooling system does not meet the requirements.

[0161] by Figure 1Taking the illustrated scheme as an example, during the operation of the direct cooling system, the first control valve 211a, the second control valve 211b, the third control valve 221a, the fourth control valve 221b, the sixth control valve 212a, the seventh control valve 212b, the ninth control valve 222a, and the tenth control valve 222b can be closed first, while the fifth control valve 51, the eighth control valve 61, and the eleventh control valve 62 can be opened. The medium discharged from the compressor 1 flows along the fifth flow channel 5 to the condenser 3, and after passing through the condenser 3, the liquid storage assembly 7, and other devices, it enters the heat exchange assembly 4. The medium flowing out of the heat exchange assembly 4 can flow along the sixth flow channel 6 to the compressor 1. When the suction superheat of the compressor 1 is greater than 5°C, it indicates that the direct cooling system is operating normally. At this time, the possibility of liquid slugging in the compressor 1 is low, and the direct cooling system meets the requirements. When the suction superheat of compressor 1 is less than or equal to 5°C, it indicates a high probability of liquid slugging in compressor 1, and the direct cooling system does not meet the requirements. In this case, the first control valve 211a, the second control valve 211b, the sixth control valve 212a, and the seventh control valve 212b can be opened to activate the first regenerator section 21, or the third control valve 221a, the fourth control valve 221b, the ninth control valve 222a, and the tenth control valve 222b can be opened to activate the second regenerator section 22. Simultaneously, the flow rate of the medium into the regenerator section can be controlled by adjusting the opening of each control valve, allowing at least a portion of the medium to flow into the regenerator section. The opening of the control valves related to the regenerator section can be gradually increased according to requirements, while the fifth control valve 51 and the eighth or eleventh control valve 61 corresponding to the regenerator section in operation can be decreased. When the first regenerating section 21 is operating, the openings of the first control valve 211a, second control valve 211b, sixth control valve 212a, and seventh control valve 212b can be gradually increased, while the openings of the fifth control valve 51 and eighth control valve 61 can be decreased. When the second regenerating section 22 is operating, the openings of the third control valve 221a, fourth control valve 221b, ninth control valve 222a, and tenth control valve 222b can be gradually increased, while the openings of the fifth control valve 51 and eleventh control valve 62 can be decreased. While adjusting the openings of each control valve, the suction superheat of the compressor 1 is measured until the suction superheat exceeds 5°C. When the first control valve 211a, the second control valve 211b, the sixth control valve 212a, and the seventh control valve 212b are fully open, and the fifth control valve 51 and the eighth control valve 61 are fully closed, or when the third control valve 221a, the fourth control valve 221b, the ninth control valve 222a, and the tenth control valve 222b are fully open, and the fifth control valve 51 and the eleventh control valve 62 are fully closed, that is, when the first regenerating section 21 or the second regenerating section 22 is in full working condition, and the suction superheat of the compressor 1 is still less than or equal to 5°C, then the control valve related to another regenerating section is opened.For example, the first regenerating section 21 can be opened first. If the suction superheat is still less than or equal to 5°C after the first regenerating section 21 is in operation, the openings of the third control valve 221a, fourth control valve 221b, ninth control valve 222a, and tenth control valve 222b can be increased, while the openings of the fifth control valve 51 and eleventh control valve 62 can be decreased. This allows the first regenerating section 21 and the second regenerating section 22 to operate simultaneously, further increasing the suction superheat of the compressor 1 to greater than 5°C. Alternatively, the second regenerating section 22 can be opened first. If the suction superheat is still less than or equal to 5°C after the second regenerating section 22 is in operation, the openings of the first control valve 211a, second control valve 211b, sixth control valve 212a, and seventh control valve 212b can be increased, while the openings of the fifth control valve 51 and eighth control valve 61 can be decreased. This allows the first regenerating section 21 and the second regenerating section 22 to operate simultaneously, further increasing the suction superheat of the compressor 1. When the first regenerating section 21 and the second regenerating section 22 are working simultaneously, if the intake superheat is greater than 5°C, the direct cooling system meets the requirements. If, when the first regenerating section 21 and the second regenerating section 22 are working simultaneously, the intake superheat is greater than 5°C, but the intake superheat is still less than or equal to 5°C, then the direct cooling system does not meet the requirements.

[0162] This application provides a direct cooling system and a control method for the direct cooling system. The direct cooling system includes a compressor 1, a condenser 3, a regenerator assembly 2, a heat exchange assembly 4, and a throttling element 50. The regenerator assembly 2 is connected to the outlet side of the compressor 1 and the inlet side of the condenser 3. The heat exchange assembly 4 includes at least one heat exchange section 41. The inlet side of the heat exchange assembly 4 is connected to the outlet side of the condenser 3, and the outlet side of the heat exchange assembly 4 is connected to the inlet side of the compressor 1. The regenerator assembly 2 includes a first regenerator section 21 and a second regenerator section 22. The first regenerator section 21 includes a first flow channel section 211 and a second flow channel section 212. The second regenerator section 22 includes a third flow channel section 221 and a fourth flow channel section 222. The first flow channel section 211 connects the outlet side of the compressor 1 and the inlet side of the condenser 3, and the third flow channel section 221 connects the outlet side of the compressor 1 and the inlet side of the condenser 3. The first regenerator section 21 and the second regenerator section 22 can be regenerators. The first flow channel section 211 and the third flow channel section 221 are arranged in parallel. This design reduces the flow resistance of the direct cooling system, while the parallel connection of the first regenerating section 21 and the second regenerating section 22 improves the stability of the direct cooling system.

[0163] 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 direct cooling system, characterized in that, The direct cooling system includes: Compressor (1); Condenser (3); A regenerative assembly (2) is provided, wherein the regenerative assembly (2) is connected to the outlet side of the compressor (1) and the inlet side of the condenser (3); At least one heat exchange section (41), the outlet side of which is connected to the inlet side of the compressor (1); A throttling element (50) is connected between the condenser (3) and the outlet side of the heat exchange section (41); The regenerative assembly (2) includes a first regenerative section (21) and a second regenerative section (22). The first regenerative section (21) includes a first flow channel section (211) and a second flow channel section (212). The first flow channel section (211) connects the outlet side of the compressor (1) and the inlet side of the condenser (3). The second flow channel section (212) connects the inlet side of the compressor (1) and the outlet side of the heat exchange section (41). The second regenerative section (22) includes a third flow channel section (221) and a fourth flow channel section (222). The third flow channel section (221) connects the outlet side of the compressor (1) and the inlet side of the condenser (3). The fourth flow channel section (222) connects the inlet side of the compressor (1) and the outlet side of the heat exchange section (41). The first flow channel section (211) and the third flow channel section (221) are arranged in parallel.

2. The direct cooling system according to claim 1, characterized in that, The first regenerating section (21) is connected to a control valve, and / or the second regenerating section (22) is connected to a control valve.

3. The direct cooling system according to claim 2, characterized in that, Including a first state, in the first state, the control valve connected to the first regenerating section (21) is opened, the control valve connected to the second regenerating section (22) is opened, and the outlet side of the compressor (1) is connected to the inlet side of the condenser (3) through the first flow channel section (211) and the third flow channel section (221); Including the second state, in the second state, the control valve connected to the first regenerating section (21) is opened, the control valve connected to the second regenerating section (22) is closed, and the outlet side of the compressor (1) is connected to the inlet side of the condenser (3) through the first flow channel section (211); Including a third state, in which the control valve connected to the first regenerating section (21) is closed, the control valve connected to the second regenerating section (22) is open, and the outlet side of the compressor (1) is connected to the inlet side of the condenser (3) through the third flow channel section (221).

4. The direct cooling system according to claim 2 or 3, characterized in that, The outlet side of the compressor (1) is connected to the inlet side of the condenser (3) via a fifth flow channel (5), and the fifth flow channel (5) is connected to a control valve.

5. The direct cooling system according to claim 4, characterized in that, Including a fourth state, in which the control valve connected to the first regenerating section (21) is closed, the control valve connected to the second regenerating section (22) is closed, the control valve connected to the fifth flow channel section (5) is open, and the outlet side of the compressor (1) is connected to the inlet side of the condenser (3) through the fifth flow channel section (5).

6. The direct cooling system according to claim 4, characterized in that, The first flow channel (211) is connected to a first control valve (211a) and a second control valve (211b). The first control valve (211a) is located on the inlet side of the first flow channel (211), and the second control valve (211b) is located on the outlet side of the first flow channel (211). The third flow channel (221) is connected to a third control valve (221a) and a fourth control valve (221b). The third control valve (221a) is located on the inlet side of the third flow channel (221), and the fourth control valve (221b) is located on the outlet side of the third flow channel (221). The fifth flow channel (5) is connected to a fifth control valve (51), which is used to control the on / off state of the fifth flow channel (5).

7. The direct cooling system according to any one of claims 1 to 3, characterized in that, The second flow channel (212) is connected to a sixth control valve (212a) and a seventh control valve (212a). The sixth control valve (212a) is located on the inlet side of the second flow channel (212), and the seventh control valve (212a) is located on the outlet side of the second flow channel (212).

8. The direct cooling system according to claim 7, characterized in that, The outlet side of the heat exchange section (41) is connected to the inlet side of the compressor (1) through the sixth flow channel section (6), and the sixth flow channel section (6) is connected to the eighth control valve (61); The inlet and outlet sides of the second flow channel (212) are both connected to the sixth flow channel (6), and the inlet side of the second flow channel (212) is connected to the inlet side of the eighth control valve (61), and the outlet side of the second flow channel (212) is connected to the outlet side of the eighth control valve (61).

9. The direct cooling system according to any one of claims 1 to 3, characterized in that, The fourth flow channel section (222) is connected to a ninth control valve (222a) and a tenth control valve (222b). The ninth control valve (222a) is located on the inlet side of the fourth flow channel section (222), and the tenth control valve (222b) is located on the outlet side of the fourth flow channel section (222).

10. The direct cooling system according to claim 7, characterized in that, The outlet side of the heat exchange section (41) is connected to the inlet side of the compressor (1) through the sixth flow channel section (6), and the sixth flow channel section (6) is connected to the eleventh control valve (62); The inlet and outlet sides of the fourth flow channel (222) are both connected to the sixth flow channel (6), and the inlet side of the fourth flow channel (222) is connected to the inlet side of the eleventh control valve (62), and the outlet side of the fourth flow channel (222) is connected to the outlet side of the eleventh control valve (62).

11. The direct cooling system according to any one of claims 1 to 3, characterized in that, The direct cooling system includes a heat exchange assembly (4), which includes a distributor (42) and at least two heat exchange sections (41). The outlet side of the distributor (42) is connected to the inlet side of each heat exchange section (41), and each heat exchange section (41) is provided with a throttling element (50) and a first flow meter (43) at its inlet side.

12. A control method for a direct cooling system, used to control the direct cooling system according to any one of claims 1 to 11, characterized in that, Includes the following steps: Measure the suction superheat of the compressor (1) of the direct cooling system; When the suction superheat of the compressor (1) is less than or equal to 5°C, the compressor (1) connects the first regenerating section (21) and the second regenerating section (22).

13. The control method for the direct cooling system according to claim 12, characterized in that, Before measuring the suction superheat of the compressor (1) of the direct cooling system, the following steps are included: Measure the suction superheat of the compressor (1) of the direct cooling system; When the suction superheat of the compressor (1) is less than or equal to 5°C, the compressor (1) is connected to the first regenerating section (21) or the second regenerating section (22).

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