Energy storage cabinet air conditioning unit and energy storage cabinet

Abstract

The energy storage cabinet air conditioning unit comprises a shell, a direct cooling plate, a compressor, a heat exchanger, a flash evaporator, a four-way valve, an electric control box and a cooling fan, the compressor, the four-way valve, the direct cooling plate, the flash evaporator and the heat exchanger are arranged in the shell, and the compressor, the four-way valve, the direct cooling plate, the flash evaporator and the heat exchanger are sequentially connected through a refrigerant pipeline to form a refrigerant circulation loop; one end of a refrigerant pipeline section A between the direct cooling plate and the flash evaporator is connected with a refrigerant flow channel outlet of the direct cooling plate, the other end of the refrigerant pipeline section A is connected with a gas-liquid two-phase refrigerant inlet of the flash evaporator, and a first throttling valve is arranged on the refrigerant pipeline section A; one end of a refrigerant pipeline section B between the flash evaporator and the heat exchanger is connected with a liquid refrigerant outlet of the flash evaporator, the other end of the refrigerant pipeline section B is connected with a liquid refrigerant inlet of the heat exchanger, and a second throttle valve is arranged on the refrigerant pipeline section B; and a steam refrigerant outlet of the flash evaporator is connected with an air supply port of the compressor. The structure is compact, the flash evaporator achieves the enthalpy increasing effect, and therefore the gas displacement of the compressor is improved, and the purpose of improving the heating capacity in the low-temperature environment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage, in particular to a structural improvement of an energy storage cabinet air conditioning unit. Background Art

[0002] Energy storage cabinets generate a lot of heat during use. If the heat is not dissipated in time, the temperature inside the cabinet will gradually rise. When the temperature rises to a certain level, it will affect the use of the battery cabinet (such as charging and discharging performance), and there is even a risk of explosion. At the same time, when the ambient temperature is too low, such as in winter, the low temperature environment will also cause the battery to lose power seriously, cannot charge and discharge normally, and shorten its life. Therefore, energy storage cabinets are usually equipped with air conditioning products to control the battery temperature within an appropriate range.

[0003] There are two common types of air conditioning products for energy storage cabinets on the market: air cooling and liquid cooling. Liquid cooling has gradually become the main means of energy storage temperature control. Most of the current liquid cooling temperature control products are large in size and heavy in weight, making them difficult to repair, replace and move. The large size leads to high costs and large floor space, which squeezes the space for the batteries in the energy storage cabinet. At the same time, the liquid cooling energy storage temperature control products on the market have high energy consumption and low energy efficiency. While dissipating heat for the battery, they also consume a lot of electricity, which is not in line with the current development trend of low-carbon energy conservation. In addition, energy storage liquid cooling technology also has problems such as slow heating and cooling rates, poor temperature uniformity of the battery cells, low energy conversion efficiency and high system costs.

[0004] With the development of energy storage battery technology, high-capacity batteries are gradually being used, and the installed density of energy storage systems is also gradually increasing. The requirements for the capabilities of temperature control products are increasing, and the shortcomings of liquid-cooled temperature control products, such as slow heating and cooling rates, poor battery cell temperature uniformity, low energy conversion efficiency, and high system costs, are becoming increasingly apparent. In order to adapt to the development of the energy storage industry, improve the temperature control rate, temperature uniformity, and energy conversion efficiency of the battery cells in the energy storage cabinet, and reduce system costs, a direct cooling system is currently being installed on the energy storage cabinet, which directly exchanges heat with the energy storage battery in the energy storage cabinet through the refrigerant to control the temperature of the energy storage battery, greatly improving the temperature control rate of the energy storage battery and the system conversion rate, and reducing system costs.

[0005] However, the direct cooling air conditioners currently used in energy storage cabinets are mostly split-structured, including direct cooling plates, heat exchangers, compressors, fans, electronic control boxes and refrigerant pipelines. The split structure cannot effectively and reasonably utilize the space inside the cabinet, affecting the effective installation space of the batteries in the cabinet, and thus affecting the battery capacity; and the split structure is not easy to disassemble or repair.

[0006] At the same time, when the current energy storage direct cooling air conditioner is heating, when the ambient temperature is very low, the evaporation temperature of the compressor is low under the low ambient temperature, the heating effect is poor, and it cannot meet customer needs.

[0007] The above information disclosed in the background technology is only used to increase the understanding of the background technology of the present application, and therefore, it may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0008] In response to the problems pointed out in the background technology, the utility model proposes an energy storage cabinet air-conditioning unit and an energy storage cabinet, which optimize the layout of the internal components of the air-conditioning to make the structure compact, convenient for disassembly and maintenance, and can meet the heating capacity requirements in low temperature environments.

[0009] In order to achieve the above-mentioned utility model purpose, the utility model adopts the following technical solutions:

[0010] In some embodiments of the present application, an energy storage cabinet air conditioning unit is provided, and the energy storage cabinet air conditioning unit is a horizontal structure, comprising:

[0011] The housing has a return air port on its front side panel and an air outlet on its rear side panel, and the return air port and the air outlet both extend in the left-right direction of the housing;

[0012] The compressor, heat exchanger, flash evaporator, four-way valve, electric control box and heat dissipation fan are located in the shell, and the compressor, heat exchanger, flash evaporator, electric control box and heat dissipation fan are all arranged on the bottom plate of the shell; the electric control box and the compressor are respectively located at the left and right ends of the return air outlet, the heat exchanger and the heat dissipation fan are located at the air outlet and the heat exchanger also extends in the left and right directions of the shell, and the heat dissipation fan is located between the heat exchanger and the air outlet;

[0013] A direct cooling plate, which is arranged outside the shell and is at least used for heat exchange with the energy storage battery in the energy storage cabinet, and a refrigerant flow channel is formed inside the direct cooling plate;

[0014] The compressor, four-way valve, direct cooling plate, flash evaporator and heat exchanger are connected in sequence through a refrigerant pipeline to form a refrigerant circulation loop;

[0015] The flash evaporator has a gas-liquid two-phase refrigerant inlet, a liquid refrigerant outlet and a steam refrigerant outlet; one end of the refrigerant pipeline section A located between the direct cooling plate and the flash evaporator is connected to the refrigerant flow channel outlet of the direct cooling plate, and the other end is connected to the gas-liquid two-phase refrigerant inlet of the flash evaporator, and a first throttle valve is provided on the refrigerant pipeline section A; one end of the refrigerant pipeline section B located between the flash evaporator and the heat exchanger is connected to the liquid refrigerant outlet of the flash evaporator, and the other end is connected to the liquid refrigerant inlet of the heat exchanger, and a second throttle valve is provided on the refrigerant pipeline section B; the steam refrigerant outlet of the flash evaporator is connected to the air supply port of the compressor.

[0016] In some embodiments of the present application, the flash evaporator is vertically arranged on the bottom plate of the shell, the gas-liquid two-phase refrigerant inlet and the liquid refrigerant outlet are located at the bottom of the flash evaporator, and the steam refrigerant outlet is located at the top of the flash evaporator.

[0017] In some embodiments of the present application, the flash evaporator is located on the side where the compressor is located, and there is a space avoidance portion between the electric control box and the compressor, and the space avoidance portion is directly opposite to the heat exchanger.

[0018] In some embodiments of the present application, two heat dissipation fans are arranged at intervals along the left-right direction of the shell, and the two heat dissipation fans are installed on the same fan bracket assembly, and the fan bracket includes a main mounting plate extending along the left-right direction of the shell and a fan bracket arranged on the rear side of the main mounting plate and extending along the left-right direction of the shell; the suction end of the heat dissipation fan is fixedly connected to the main mounting plate, and the outlet end is fixedly connected to the fan bracket, and the main mounting plate is provided with a through portion corresponding to the suction ends of the two heat dissipation fans.

[0019] In some embodiments of the present application, air outlet avoidance holes are respectively provided at the left and right end portions of the fan bracket and at the portion between two adjacent heat dissipation fans.

[0020] In some embodiments of the present application, the electric control box is fitted with a left side panel of the shell, and the left side panel of the shell is composed of a removable first side panel and a second side panel, the first side panel is opposite to the electric control box cover of the electric control box, and the electric control box cover is removable; the second side panel is opposite to the area where the heat exchanger and the cooling fan are located.

[0021] In some embodiments of the present application, the electrical control box is provided with a radiator located on the return air flow path.

[0022] In some embodiments of the present application, a pull-out handle is provided on the front side panel of the shell and is located on the outer sides of the left and right ends of the return air outlet.

[0023] In some embodiments of the present application, an energy storage cabinet air conditioning unit is provided, wherein the energy storage cabinet air conditioning unit is a horizontal structure and comprises:

[0024] The housing has a return air port on its front side panel and an air outlet on its rear side panel, and the return air port and the air outlet both extend in the left-right direction of the housing;

[0025] A compressor, a heat exchanger, a flash evaporator, a four-way valve, an electric control box and a heat dissipation fan are located in the shell, and the compressor, heat exchanger, flash evaporator, electric control box and heat dissipation fan are all arranged on the bottom plate of the shell; the heat exchanger and the heat dissipation fan are located at the air outlet and the heat exchanger also extends in the left and right direction of the shell, and the heat dissipation fan is located between the heat exchanger and the air outlet;

[0026] A direct cooling plate, which is arranged outside the shell and is at least used for heat exchange with the energy storage battery in the energy storage cabinet, and a refrigerant flow channel is formed inside the direct cooling plate;

[0027] The compressor, four-way valve, direct cooling plate, flash evaporator and heat exchanger are connected in sequence through a refrigerant pipeline to form a refrigerant circulation loop;

[0028] The flash evaporator has a gas-liquid two-phase refrigerant inlet, a liquid refrigerant outlet and a steam refrigerant outlet; one end of the refrigerant pipeline section A located between the direct cooling plate and the flash evaporator is connected to the refrigerant flow channel outlet of the direct cooling plate, and the other end is connected to the gas-liquid two-phase refrigerant inlet of the flash evaporator, and a first throttle valve is provided on the refrigerant pipeline section A; one end of the refrigerant pipeline section B located between the flash evaporator and the heat exchanger is connected to the liquid refrigerant outlet of the flash evaporator, and the other end is connected to the liquid refrigerant inlet of the heat exchanger, and a second throttle valve is provided on the refrigerant pipeline section B; the steam refrigerant outlet of the flash evaporator is connected to the air supply port of the compressor.

[0029] In some embodiments of the present application, an energy storage cabinet is also proposed, comprising:

[0030] A cabinet, wherein the interior space of the cabinet includes an air conditioning compartment and an energy storage compartment, the energy storage compartment is used to accommodate at least an energy storage battery, and a through portion is provided on the cabinet at a position corresponding to the air conditioning compartment;

[0031] The air-conditioning unit is the above-mentioned energy storage cabinet air-conditioning unit, the shell is arranged in the air-conditioning compartment, and the direct cooling plate is arranged in the energy storage compartment.

[0032] Compared with the prior art, the advantages and positive effects of the utility model are:

[0033] 1. The energy storage cabinet air-conditioning unit of the utility model has a horizontal structure and a stable center of gravity, which is convenient for installation on the top of the energy storage cabinet. The height of the energy storage cabinet can be increased to add an air-conditioning compartment to place the energy storage cabinet air-conditioning unit, which does not occupy the energy storage compartment space and does not affect the battery capacity;

[0034] 2. The main structural components of the energy storage cabinet air conditioning unit (except the direct cooling plate) are integrated in the shell to form an integral module, which is convenient for disassembly and maintenance of the whole machine; at the same time, the structural components in the shell are reasonably installed and arranged to make the internal structure of the unit compact;

[0035] 3. A flash evaporator is provided in the refrigerant circulation loop of the energy storage cabinet air conditioning unit. The flash evaporator can separate the gaseous refrigerant and the solid refrigerant, and allow the separated liquid refrigerant to enter the heat exchanger (equivalent to the evaporator when heating) under the action of the compressor. At the same time, the separated gaseous refrigerant passes through the steam refrigerant outlet of the flash evaporator and directly enters the compressor to achieve the enthalpy increase effect, thereby increasing the exhaust volume of the compressor and achieving the purpose of improving the heating capacity under low temperature environment.

[0036] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0038] Figure 1 is a schematic diagram of the structure of an energy storage cabinet from the front side according to an embodiment;

[0039] Figure 2 This is a schematic diagram of the structure of the energy storage cabinet according to the embodiment with the cabinet door omitted from the rear front side perspective;

[0040] Figure 3 A schematic diagram of a refrigerant circulation circuit of an energy storage cabinet air conditioning unit according to an embodiment;

[0041] Figure 4 This is a schematic diagram of the structure of the energy storage cabinet air conditioning unit according to the embodiment with the direct cooling plate omitted from the rear front side perspective;

[0042] Figure 5 This is a schematic diagram of the structure of the energy storage cabinet air conditioning unit according to the embodiment with the direct cooling plate omitted from the rear side view;

[0043] Figure 6 It is a structural schematic diagram of the energy storage cabinet air conditioning unit according to the embodiment after omitting the direct cooling plate, the front side plate of the shell and the top plate;

[0044] Figure 7 It is a structural schematic diagram of another perspective after omitting the direct cooling plate, the front side plate of the shell and the top plate of the energy storage air conditioning unit according to the embodiment;

[0045] Figure 8 It is a structural schematic diagram of the energy storage cabinet air conditioning unit according to the embodiment after omitting the direct cooling plate, the front side plate of the shell and the top plate from another perspective;

[0046] Fig. 9 It is a schematic structural diagram of the energy storage cabinet air conditioning unit according to the embodiment after omitting a part of the direct cooling plate, the front side plate of the shell, the top plate and the left side plate;

[0047] Fig.10 This is a schematic diagram of the structure of the energy storage cabinet air conditioning unit according to the embodiment after omitting the direct cooling plate, the front side plate of the shell, the top plate, a part of the left side plate and the electric control box cover;

[0048] Fig.11 This is a schematic diagram of the structure of the energy storage cabinet air conditioning unit according to the embodiment after omitting the direct cooling plate, the front side plate of the shell, the top plate and the rear side plate;

[0049] Fig.12 is a schematic diagram of the direct cooling plate structure of the energy storage cabinet according to the embodiment;

[0050] Fig.13 for Fig.12 Exploded diagram of .

[0051] Reference numerals:

[0052] 1. Energy storage cabinet; 100. Cabinet; 110. Air conditioning compartment; 120. Energy storage compartment; 130. Cabinet door; 200. Air conditioning unit; 210. Shell; 211. First side panel; 212. Second side panel; 213. Return air outlet; 214. Air outlet; 220. Compressor; 230. Heat exchanger; 240. Flash evaporator; 250. Electric control box; 251. Electric control box cover; 252. Radiator; 260. Cooling fan; 270. First throttle valve; 280. Second throttle valve; 290. Three-way stop valve; 2100. Air avoidance; 211 0. Fan bracket; 2111. Main mounting plate; 2112. U-shaped bracket; 2120. Installation angle code; 2130. Pull-out handle; 2140. Pipeline inside the machine; 2150. Four-way valve; 2160. Direct cooling plate; 2161. Refrigerant flow channel; 2162. Refrigerant inlet; 2163. Refrigerant outlet; 2164. Upper cover; 2165. Bottom plate; 2170. Refrigerant pipeline section A; 2180. Refrigerant pipeline section B; 2190. External pipeline; 300. Connector; 400. Insulation layer; 500. Support plate; 600. Partition plate;

[0053] 2. Energy storage battery. DETAILED DESCRIPTION

[0054] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0059] The disclosure below provides many different embodiments or examples for realizing different structures of the utility model. In order to simplify the disclosure of the utility model, the components and settings of specific examples are described below. Of course, they are merely examples, and the purpose is not to limit the utility model. In addition, the utility model may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the utility model provides various specific examples of processes and materials, but those of ordinary skill in the art may be aware of the application of other processes and / or the use of other materials.

[0060] Reference Figure 1 and Figure 7 In some embodiments of the present application, an energy storage cabinet 1 is proposed, including a cabinet body 100 and an air-conditioning unit 200.

[0061] The cabinet 100 is generally a rectangular cabinet, and its internal space includes an air conditioning compartment 110 and an energy storage compartment 120, and the air conditioning compartment 110 and the energy storage compartment 120 are independent of each other. The cabinet 100 has a front opening and is equipped with a cabinet door 130 to open and close the energy storage cabinet.

[0062] The energy storage compartment 120 is at least used to accommodate batteries, specifically energy storage batteries 2, which are arranged in the form of battery PACKs formed by battery cluster packaging in the energy storage compartment 120. In some embodiments of the present application, the energy storage compartment 120 is also used to accommodate batteries PCS.

[0063] The air conditioning unit 200 is used to adjust the temperature of the energy storage cabinet and perform constant temperature management on the energy storage cabinet. It is mainly used to adjust the temperature of the battery in the energy storage compartment 120 so that the battery can operate within an ideal temperature range to avoid the battery temperature being too high or too low.

[0064] When the air conditioning unit 200 is cooling, the energy storage bin 120 is cooled. When the air conditioning unit 200 is heating, the energy storage bin 120 is heated.

[0065] The air-conditioning unit 200 has an outer contour in the shape of a flat rectangular parallelepiped, including a shell 210, a compressor 220 located in the shell 210, a heat exchanger 230, a flash evaporator 240, a four-way valve 2150, an electrical control box 250 and a heat dissipation fan 260, and also includes a direct cooling plate 2160; the compressor 220, the heat exchanger 230, the electrical control box 250 and the heat dissipation fan 260 are all arranged on the bottom plate of the shell 210.

[0066] The front side plate of the housing 210 is provided with a return air port 213, and the rear side plate is provided with an air outlet 214, so that air is returned from the front and discharged from the rear. The return air port 213 and the air outlet 214 both extend in the left-right direction of the housing. The housing 210 and its internal components (including at least the compressor 220, the heat exchanger 230, the flash evaporator 240, the four-way valve 2150, the electric control box 250, the heat dissipation fan 260 and its connecting pipelines) are placed in the air conditioning compartment 110 in a horizontal posture.

[0067] The air conditioning compartment 110 is connected with the corresponding positions of the return air inlet 213 and the air outlet 214. A through portion is provided on the cabinet 100 at the corresponding position of the air conditioning compartment 110 so as to be connected with the corresponding positions of the return air inlet 213 and the air outlet 214 so that the air conditioning unit 200 can return and exhaust air. Waterproof shutters and insect-proof nets are installed at the through portion.

[0068] The electric control box 250 and the compressor 220 are respectively located at the left and right ends of the return air port 213, the heat exchanger 230 and the cooling fan 260 are located at the air outlet 214, the heat exchanger 230 also extends in the left and right directions of the shell, and the cooling fan 260 is located between the heat exchanger 230 and the air outlet 214 to discharge the heat of the heat exchanger 230 through the air outlet 214 during cooling.

[0069] The direct cooling plate 2160 is located outside the shell 210 and is arranged in the energy storage bin 120. It is used at least for heat exchange with the energy storage battery 2. A refrigerant flow channel 2161 is formed inside the direct cooling plate 2160. The refrigerant flow channel 2161 has a refrigerant inlet 2162 and a refrigerant outlet 2163. The refrigerant in the refrigerant circulation loop flows through the direct cooling plate 2160 to exchange heat with the energy storage battery 2.

[0070] The compressor 220, the four-way valve 2150, the direct cooling plate 2160, the flash evaporator 240 and the heat exchanger 230 are sequentially connected through a refrigerant pipeline to form a refrigerant circulation loop.

[0071] The flash evaporator 240 has a gas-liquid two-phase refrigerant inlet 241, a liquid refrigerant outlet 242 and a steam refrigerant outlet 243; one end of the refrigerant pipeline section A 2170 located between the direct cooling plate 2160 and the flash evaporator 240 is connected to the refrigerant outlet 2163 of the direct cooling plate 2160, and the other end is connected to the gas-liquid two-phase refrigerant inlet 241 of the flash evaporator 240, and a first throttle valve 270 is provided on the refrigerant pipeline section A 2170; one end of the refrigerant pipeline section B 2180 located between the flash evaporator 240 and the heat exchanger 230 is connected to the liquid refrigerant outlet 242 of the flash evaporator 240, and the other end is connected to the liquid refrigerant inlet of the heat exchanger 230, and a second throttle valve 280 is provided on the refrigerant pipeline section B 2180; the steam refrigerant outlet 243 of the flash evaporator 240 is connected to the air supply port of the compressor 220.

[0072] During refrigeration, the refrigerant is compressed into a high-temperature and high-pressure gas by the compressor 220, enters the heat exchanger 230 through the four-way valve 2150, and is condensed and dissipated by the cooling fan 260 to become a medium-temperature and high-pressure liquid refrigerant. It is throttled by the first throttle valve 270, enters the flash evaporator 240, and then throttled by the second throttle valve 280. It exchanges heat through the direct cooling plate 2160 to cool the energy storage battery 2. The refrigerant after heat exchange returns to the compressor 220 to complete the refrigeration cycle.

[0073] The throttle valve expands the high-temperature and high-pressure liquid refrigerant condensed in the heat exchanger 230 into a low-pressure liquid refrigerant. The direct cooling plate 2160 (used as an evaporator) evaporates the refrigerant expanded in the expansion valve and returns the low-temperature and low-pressure refrigerant gas to the compressor 220.

[0074] During heating, the four-way valve 2150 is reversed, and the high-temperature and high-pressure refrigerant discharged from the compressor 220 enters the direct cooling plate 2160 through the four-way valve 2150, condenses and releases heat in the direct cooling plate 2160, heats up the energy storage battery 2, and then first passes through the first throttle valve 270 for throttling, enters the flash evaporator 240 through the gas-liquid two-phase refrigerant inlet 241, and the refrigerant entering the flash evaporator 240 will partially flash due to the pressure reduction, and the flashed refrigerant enters the compressor 220 through the steam refrigerant outlet 243 and the air supply port of the compressor 220, and the liquid refrigerant cooled by the flash evaporator 240 flows out through the liquid refrigerant outlet 242 and passes through the second throttle valve 280 for secondary throttling to enter the heat exchanger 230 (used as a condenser). After evaporating and absorbing heat in the heat exchanger 230, the refrigerant passes through the four-way valve 2160 and is sucked into the compressor 220, completing the entire cycle.

[0075] Among them, the first throttle valve 270 is a main flow regulating valve. The flow through the system can be adjusted by adjusting the opening of the first throttle valve 270, and the refrigerant flow and air supply volume flowing through the evaporator can be adjusted by adjusting the second throttle valve 280.

[0076] The flash evaporator 240 can separate the gaseous refrigerant and the solid refrigerant, and allow the separated liquid refrigerant to enter the heat exchanger 230 (equivalent to the evaporator when heating) under the action of the compressor 220. At the same time, the separated gaseous refrigerant passes through the steam refrigerant outlet 243 of the flash evaporator 240 and directly enters the compressor 220, thereby achieving an enthalpy increase effect, thereby increasing the exhaust volume of the compressor 220 and achieving the purpose of improving the heating capacity in a low-temperature environment.

[0077] The energy storage cabinet 1 in the embodiment of the present application divides the internal space of the cabinet body 100 into zones, so as to reasonably install and arrange the shell 210 of the air-conditioning unit 200 and its internal components, the direct cooling plate 2160, and the energy storage battery 2, so that the internal structure of the energy storage cabinet is compact, which is conducive to increasing the battery capacity; the refrigerant is directly used to perform heat exchange with the energy storage battery 2 through the direct cooling plate 2160 to control the battery temperature, which effectively improves the temperature control efficiency; the main structural components of the energy storage cabinet air-conditioning unit (except the direct cooling plate 2160) are integrated in the shell 210 to form an integral module, which is convenient for disassembly and maintenance of the whole machine; at the same time, the shell 210 is The structural components are reasonably installed and arranged to make the internal structure of the unit compact; the energy storage cabinet air conditioning unit is a horizontal structure with a stable center of gravity, which is convenient for installation on the top of the energy storage cabinet and does not occupy the battery installation space; the air conditioning unit 200 adopts front return and rear outlet, the return air inlet 213 and the air outlet 214 are extended left and right, the electric control box 250 and the compressor 220 are respectively located at the left and right ends of the return air inlet 213, the heat exchanger 230 and the heat dissipation fan 260 are located at the air outlet 214, and the heat dissipation fan 260 is located between the heat exchanger 230 and the air outlet 214, so as to improve the return air capacity and ensure the stability of the center of gravity of the whole machine.

[0078] In some embodiments of the present application, the flash evaporator 240 is vertically arranged on the bottom plate of the shell 210, the gas-liquid two-phase refrigerant inlet 241 and the liquid refrigerant outlet 242 are located at the bottom of the flash evaporator, and the steam refrigerant outlet 243 is located at the top of the flash evaporator 240, so that the gaseous refrigerant floats up and the liquid refrigerant descends.

[0079] Since there are usually multiple energy storage batteries 2 in the energy storage cabinet 1, in order to improve the temperature control efficiency and the temperature uniformity of each battery, in some embodiments of the present application, there are multiple direct cooling plates 2160, which are arranged one by one corresponding to the multiple energy storage batteries 2; the multiple direct cooling plates 2160 are connected in parallel to the refrigerant circulation loop, Figure 3 Only one energy storage battery 2 is used as an example.

[0080] In some embodiments of the present application, a plurality of direct cooling plates 2160 are spaced apart in the energy storage bin 120 along the height direction of the cabinet 100, and the energy storage battery 2 is correspondingly arranged above the direct cooling plate 2160, and the direct cooling plate 2160 contacts the bottom surface of the energy storage battery 2 to further improve the temperature control efficiency.

[0081] In some embodiments of the present application, an insulation layer 400 is designed at the bottom of the direct cooling plate 2160 to avoid condensation and cooling loss.

[0082] In some embodiments of the present application, the air conditioning compartment 110 is located above the energy storage compartment 120 and at the top of the cabinet 100. Then each energy storage battery 2 is located below the air conditioning unit 200, which is convenient for taking and placing the energy storage battery 2.

[0083] In some embodiments of the present application, a plurality of horizontally arranged support plates 500 are fixedly arranged in the energy storage bin 120 at intervals along the height direction of the cabinet 100, and the direct cooling plate 2160 is correspondingly supported on the support plates 500. The insulation layer 400 is sandwiched between the direct cooling plate 2160 and the support plates 500.

[0084] like Figure 3 As shown, the flash evaporator 240 is located on the side where the compressor 220 is located to facilitate pipeline connection; there is a gap 2100 between the electric control box 250 and the compressor 220, and the gap 2100 is directly opposite to the heat exchanger 230, that is, there is a large distance between the electric control box 250 and the compressor 220, and a gap design is left to ensure smooth return air flow and improve the return air capacity, and the electric control box 250 and the compressor 220 are respectively located at both ends of the return air outlet 213, which is beneficial to ensure the stability of the center of gravity of the whole machine.

[0085] Reference Figures 6 to 11 In some embodiments of the present application, two heat dissipation fans 260 are arranged at intervals along the left and right directions of the shell to increase the air volume and thus improve the heat dissipation effect.

[0086] Two cooling fans 260 are installed on the same fan bracket 2110. The fan bracket 2110 includes a main mounting plate 2111 extending along the left-right direction of the shell and a fan bracket 2112 arranged on the rear side of the main mounting plate 2111 and extending along the left-right direction of the shell. The periphery of the main mounting plate 2111 is fixedly connected to the corresponding side plate of the shell 210. The suction end of the cooling fan 260 is fixedly connected to the main mounting plate 2111, and the outlet end is fixedly connected to the fan bracket 2112. The main mounting plate 2111 is provided with a through portion corresponding to the suction ends of the two cooling fans 260.

[0087] The two cooling fans 260 are installed on the same fan bracket 2110 and can be used as an integral fan module. Before installation, the entire fan module can be pre-assembled as one, and then installed as a whole in the housing 210, which improves assembly efficiency and reduces assembly difficulty.

[0088] In some embodiments of the present application, air outlet avoidance holes are respectively provided at the left and right ends of the fan bracket 2112 and at the position between two adjacent heat dissipation fans 260 to reduce wind resistance and improve the wind field.

[0089] The cabinet body 100 is provided with a partition plate 600 in its internal space to divide the space inside the cabinet into two independent upper and lower compartments, the upper one is the air-conditioning compartment 110, and the lower one is the energy storage compartment 120. Water and dust entering the air-conditioning compartment 110 will not enter the energy storage compartment 120, which can avoid safety hazards such as short circuit of the energy storage battery 2 due to water and dust ingress.

[0090] The bottom plate of the housing 210 of the air-conditioning unit 200 is provided with a mounting angle code 2120 , and the air-conditioning unit 200 is fixed on the partition plate 600 as a whole by screw fastening.

[0091] In some embodiments of the present application, a pull-out handle 2130 is provided on the front side plate of the housing 210 and is located outside the left and right ends of the return air outlet 213. The air conditioning unit 200 can be detached from the cabinet 100 by removing the screws, and the entire air conditioning unit 200 can be conveniently pulled out by holding the pull-out handle 2130.

[0092] In some embodiments of the present application, reference Figures 7 to 9 The electric control box 250 is arranged on the left side plate of the housing 210. The left side plate of the housing 210 is composed of a detachable first side plate 211 and a second side plate 212. The first side plate 211 is opposite to the electric control box cover 251 of the electric control box 250, and the electric control box cover 251 is detachable; the second side plate 212 is opposite to the area where the heat exchanger 230 and the heat dissipation fan 260 are located. The first side plate 211 can serve as a maintenance plate of the electric control box 250, which is a detachable structure. When maintenance or repair is required, the first side plate 211 can be removed, and then the electric control box cover 251 can be removed, and relevant operations can be performed on the internal electrical components of the electric control box 250.

[0093] Similarly, the second side plate 212 may also be configured as a detachable structure to facilitate maintenance of the cooling fan 260 or the heat exchanger 230 .

[0094] In some embodiments of the present application, in order to further facilitate the maintenance or repair of the electric control box 250, the portion of the cabinet 100 corresponding to the left side panel of the air-conditioning unit 200 is also configured as a detachable structure.

[0095] The above-mentioned detachable structure can be a screw connection structure or a snap connection structure, etc.

[0096] like Figure 6 and Figure 7 As shown, in some embodiments of the present application, the electric control box 250 is provided with a radiator 252 located on the return air flow path, which can take away the heat generated by the electric control box 250 during operation and ensure the working reliability of the electric control box 250.

[0097] To further facilitate disassembly and maintenance, the refrigerant pipeline connecting the compressor 220, the four-way valve 2150, the direct cooling plate 2160, the flash evaporator 240 and the heat exchanger 230 includes an internal pipeline 2140 located inside the shell 210 of the air-conditioning unit 200 and an external pipeline 2190 located outside the shell 210 and inside the cabinet 100.

[0098] Figure 3 The dotted line L is used as the dividing line, the pipeline below it is the internal pipeline 2140, and the pipeline above it is the external pipeline 2190.

[0099] The external pipeline 2190 is located in the internal space of the energy storage cabinet body 100, and includes two sections located on both sides of the direct cooling plate 2160, one end of one section of the external pipeline is connected to the refrigerant inlet 2162 of the direct cooling plate 2160 through a connector 300, and the other section is connected to one of the ports of the internal pipeline 2140 through a three-way stop valve 290, one end of the other section of the external pipeline is connected to the refrigerant outlet 2163 of the direct cooling plate 2160 through another connector 300, and the other section is connected to another port of the internal pipeline 2140 through another three-way stop valve 290.

[0100] The pipeline of the refrigerant circulation loop is divided into two parts: an internal pipeline 2140 and an external pipeline 2190. The internal pipeline 2140 is integrated in the shell 210 of the air-conditioning unit 200, and can be disassembled and assembled together with the shell of the air-conditioning unit 200. The external pipeline 2190 can be disassembled and assembled separately, thereby facilitating the disassembly and maintenance of each component.

[0101] In some embodiments of the present application, the three-way stop valve 290 is arranged on the front side plate of the shell 210, that is, it is integrated with the shell 210 and can be disassembled and assembled together with the shell 210. The three-way stop valve 290 adopts two-stage automotive-grade sealing to improve the sealing performance.

[0102] For direct cooling plate 2160, refer to Fig.12 and Fig.13 In some embodiments of the present application, it includes an upper cover 2164 and a bottom plate 2165, and the upper cover 2164 and the bottom plate 2165 are combined to form a refrigerant flow channel 2161, and an inlet channel connected to the refrigerant inlet 2162 of the refrigerant flow channel 2161 and an outlet channel connected to the refrigerant outlet 2163 of the refrigerant flow channel 2161 are formed on the joint 300.

[0103] In some embodiments of the present application, the connector 300 is disposed on the upper cover 2164, and a through portion is correspondingly provided on the upper cover 2164 so that the inlet channel of the connector 300 is connected with the refrigerant inlet 2162 of the refrigerant flow channel 2161, and the outlet channel of the connector 300 is connected with the refrigerant outlet 2163 of the refrigerant flow channel 2161.

[0104] The upper cover 2164 and the base are connected into a whole by welding or bolts + sealing rings to ensure that each flow path does not interfere with each other and is well sealed. The connector 300 can be fixed to the upper cover 2164 by welding or bolts + sealing rings to ensure that the seal is good and the inlet and outlet do not interfere with each other.

[0105] In some embodiments of the present application, an energy storage cabinet air conditioning unit is a horizontal structure.

[0106] The air-conditioning unit 200 has an outer contour in the shape of a flat rectangular parallelepiped, including a shell 210, a compressor 220 located in the shell 210, a heat exchanger 230, a flash evaporator 240, a four-way valve 2150, an electrical control box 250 and a heat dissipation fan 260, and also includes a direct cooling plate 2160; the compressor 220, the heat exchanger 230, the flash evaporator 240, the electrical control box 250 and the heat dissipation fan 260 are all arranged on the bottom plate of the shell 210.

[0107] The front side plate of the housing 210 is provided with a return air port 213, and the rear side plate is provided with an air outlet 214, so that air is returned from the front and discharged from the rear. The return air port 213 and the air outlet 214 both extend in the left-right direction of the housing. The housing 210 and its internal components (including at least the compressor 220, the heat exchanger 230, the flash evaporator 240, the four-way valve 2150, the electric control box 250, the heat dissipation fan 260 and its connecting pipelines) are placed in the air conditioning compartment 110 in a horizontal posture.

[0108] The air conditioning compartment 110 is connected with the corresponding positions of the return air inlet 213 and the air outlet 214. A through portion is provided on the cabinet 100 at the corresponding position of the air conditioning compartment 110 so as to be connected with the corresponding positions of the return air inlet 213 and the air outlet 214 so that the air conditioning unit 200 can return and exhaust air. Waterproof shutters and insect-proof nets are installed at the through portion.

[0109] The heat exchanger 230 and the cooling fan 260 are located at the air outlet 214. The heat exchanger 230 also extends in the left-right direction of the shell. The cooling fan 260 is located between the heat exchanger 230 and the air outlet 214 to discharge the heat of the heat exchanger 230 through the air outlet 214 during cooling.

[0110] The direct cooling plate 2160 is located outside the shell 210 and is arranged in the energy storage bin 120. It is used at least for heat exchange with the energy storage battery 2. A refrigerant flow channel 2161 is formed inside the direct cooling plate 2160. The refrigerant flow channel 2161 has a refrigerant inlet 2162 and a refrigerant outlet 2163. The refrigerant in the refrigerant circulation loop flows through the direct cooling plate 2160 to exchange heat with the energy storage battery 2.

[0111] The compressor 220, the four-way valve 2150, the direct cooling plate 2160, the flash evaporator 240 and the heat exchanger 230 are sequentially connected through a refrigerant pipeline to form a refrigerant circulation loop.

[0112] The flash evaporator 240 has a gas-liquid two-phase refrigerant inlet 241, a liquid refrigerant outlet 242 and a steam refrigerant outlet 243; one end of the refrigerant pipeline section A 2170 located between the direct cooling plate 2160 and the flash evaporator 240 is connected to the refrigerant outlet 2163 of the direct cooling plate 2160, and the other end is connected to the gas-liquid two-phase refrigerant inlet 241 of the flash evaporator 240, and a first throttle valve 270 is provided on the refrigerant pipeline section A 2170; one end of the refrigerant pipeline section B 2180 located between the flash evaporator 240 and the heat exchanger 230 is connected to the liquid refrigerant outlet 242 of the flash evaporator 240, and the other end is connected to the liquid refrigerant inlet of the heat exchanger 230, and a second throttle valve 280 is provided on the refrigerant pipeline section B 2180; the steam refrigerant outlet 243 of the flash evaporator 240 is connected to the air supply port of the compressor 220.

[0113] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in a suitable manner in any one or more embodiments or examples.

[0114] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited to this. Any changes or substitutions that can be easily thought of by technicians familiar with the technical field within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An energy storage cabinet air conditioning unit, characterized in that: The energy storage cabinet air conditioning unit is a horizontal structure, comprising: The housing has a return air port on its front side panel and an air outlet on its rear side panel, and the return air port and the air outlet both extend in the left-right direction of the housing; The compressor, heat exchanger, flash evaporator, four-way valve, electric control box and heat dissipation fan are located in the shell, and the compressor, heat exchanger, flash evaporator, electric control box and heat dissipation fan are all arranged on the bottom plate of the shell; the electric control box and the compressor are respectively located at the left and right ends of the return air outlet, the heat exchanger and the heat dissipation fan are located at the air outlet and the heat exchanger also extends in the left and right directions of the shell, and the heat dissipation fan is located between the heat exchanger and the air outlet; A direct cooling plate, which is arranged outside the shell and is at least used for heat exchange with the energy storage battery in the energy storage cabinet, and a refrigerant flow channel is formed inside the direct cooling plate; The compressor, four-way valve, direct cooling plate, flash evaporator and heat exchanger are connected in sequence through a refrigerant pipeline to form a refrigerant circulation loop; The flash evaporator has a gas-liquid two-phase refrigerant inlet, a liquid refrigerant outlet and a steam refrigerant outlet; one end of the refrigerant pipeline section A located between the direct cooling plate and the flash evaporator is connected to the refrigerant flow channel outlet of the direct cooling plate, and the other end is connected to the gas-liquid two-phase refrigerant inlet of the flash evaporator, and a first throttle valve is provided on the refrigerant pipeline section A; one end of the refrigerant pipeline section B located between the flash evaporator and the heat exchanger is connected to the liquid refrigerant outlet of the flash evaporator, and the other end is connected to the liquid refrigerant inlet of the heat exchanger, and a second throttle valve is provided on the refrigerant pipeline section B; the steam refrigerant outlet of the flash evaporator is connected to the air supply port of the compressor.

2. The energy storage cabinet air conditioning unit according to claim 1, characterized in that: The flash evaporator is vertically arranged on the bottom plate of the shell, the gas-liquid two-phase refrigerant inlet and the liquid refrigerant outlet are located at the bottom of the flash evaporator, and the steam refrigerant outlet is located at the top of the flash evaporator.

3. The energy storage cabinet air conditioning unit according to claim 1, characterized in that: The flash evaporator is located at the side where the compressor is located, and there is an air avoidance portion between the electric control box and the compressor, and the air avoidance portion is directly opposite to the heat exchanger.

4. The energy storage cabinet air conditioning unit according to claim 1, characterized in that: Two heat dissipation fans are arranged at intervals along the left and right directions of the shell, and the two heat dissipation fans are installed on the same fan bracket assembly. The fan bracket includes a main mounting plate extending along the left and right directions of the shell and a fan bracket arranged on the rear side of the main mounting plate and extending along the left and right directions of the shell; the air suction end of the heat dissipation fan is fixedly connected to the main mounting plate, and the air outlet end is fixedly connected to the fan bracket, and the main mounting plate is provided with a through portion corresponding to the air suction ends of the two heat dissipation fans.

5. The energy storage cabinet air conditioning unit according to claim 4, characterized in that: The left and right end portions of the fan bracket and the portion between two adjacent heat dissipation fans are respectively provided with air outlet avoidance holes.

6. The energy storage cabinet air conditioning unit according to claim 4, characterized in that: The electric control box is fitted with the left side plate of the shell, and the left side plate of the shell is composed of a detachable first side plate and a second side plate, and the first side plate is directly opposite to the electric control box cover of the electric control box, and the electric control box cover is detachable; The second side plate is directly opposite to the area where the heat exchanger and the heat dissipation fan are located.

7. The energy storage cabinet air conditioning unit according to claim 6, characterized in that: The electric control box is provided with a radiator located on the return air flow path.

8. The energy storage cabinet air conditioning unit according to claim 1, characterized in that: The front side plate of the shell is provided with a pull-out handle located outside the left and right ends of the return air outlet.

9. An energy storage cabinet air conditioning unit, characterized in that: The energy storage cabinet air conditioning unit is a horizontal structure, comprising: The housing has a return air port on its front side panel and an air outlet on its rear side panel, and the return air port and the air outlet both extend in the left-right direction of the housing; A compressor, a heat exchanger, a flash evaporator, a four-way valve, an electric control box and a heat dissipation fan are located in the shell, and the compressor, heat exchanger, flash evaporator, electric control box and heat dissipation fan are all arranged on the bottom plate of the shell; the heat exchanger and the heat dissipation fan are located at the air outlet and the heat exchanger also extends in the left and right direction of the shell, and the heat dissipation fan is located between the heat exchanger and the air outlet; A direct cooling plate, which is arranged outside the shell and is at least used for heat exchange with the energy storage battery in the energy storage cabinet, and a refrigerant flow channel is formed inside the direct cooling plate; The compressor, four-way valve, direct cooling plate, flash evaporator and heat exchanger are connected in sequence through a refrigerant pipeline to form a refrigerant circulation loop; The flash evaporator has a gas-liquid two-phase refrigerant inlet, a liquid refrigerant outlet and a steam refrigerant outlet; one end of the refrigerant pipeline section A located between the direct cooling plate and the flash evaporator is connected to the refrigerant flow channel outlet of the direct cooling plate, and the other end is connected to the gas-liquid two-phase refrigerant inlet of the flash evaporator, and a first throttle valve is provided on the refrigerant pipeline section A; one end of the refrigerant pipeline section B located between the flash evaporator and the heat exchanger is connected to the liquid refrigerant outlet of the flash evaporator, and the other end is connected to the liquid refrigerant inlet of the heat exchanger, and a second throttle valve is provided on the refrigerant pipeline section B; the steam refrigerant outlet of the flash evaporator is connected to the air supply port of the compressor.

10. An energy storage cabinet, characterized in that: include: A cabinet, wherein the interior space of the cabinet includes an air conditioning compartment and an energy storage compartment, the energy storage compartment is used to accommodate at least an energy storage battery, and a through portion is provided on the cabinet at a position corresponding to the air conditioning compartment; An air-conditioning unit, which is the energy storage cabinet air-conditioning unit according to any one of claims 1 to 9, wherein the shell is arranged in the air-conditioning compartment, and the direct cooling plate is arranged in the energy storage compartment.

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