Cooling system and cooling method for power generation and energy storage equipment of special vehicle

Abstract

The invention discloses a cooling system and a cooling method for power generation and energy storage equipment of a special vehicle. The cooling system comprises a refrigerant loop and a cooling loop connected through the refrigerant loop. The cooling loop is integrated in power generation and energy storage equipment; the refrigerant loop comprises a liquid cooling condenser, a compressor, a cooler, an evaporator, an expansion valve and an expansion box; the refrigerant loop is provided with a first refrigerating loop and a second refrigerating loop, the cooling loop is connected with the refrigerant loop through the first refrigerating loop and an expansion box, and the cooling loop is cooled through the first refrigerating loop and / or the second refrigerating loop. By the adoption of the cooling system and the cooling method, the cooling efficiency of the whole system is improved to a great extent, the technical problem that in the prior art, the refrigeration requirement of power generation and energy storage equipment cannot be met is solved, and the use requirement of the special vehicle is met.

Description

Technical Field

[0001] This invention relates to the field of vehicle auxiliary cooling technology, specifically to a cooling system and cooling method for power generation and energy storage equipment in special vehicles. Background Technology

[0002] Cooling technology is one of the core technologies of automobiles. Because automobiles contain many heat-generating components (batteries, motors, controllers, chargers, etc.), their cooling performance becomes particularly important. This is especially true for modern military special vehicles, such as self-propelled artillery power supply vehicles, radar power supply vehicles, and command and communication vehicles, which are developing towards high power, electrification, and intelligence. Onboard high-power generator sets (diesel generators), large-capacity energy storage battery systems, and related power electronic equipment such as inverters and converters have become core components. Since these devices generate a large amount of heat during operation, the effectiveness of their liquid cooling system directly determines the vehicle's power supply reliability, mission duration, and entire lifespan.

[0003] The existing cooling solutions for this type of equipment have the following main drawbacks: First, there are limitations to air cooling: a simple air cooling system has a drastic drop in heat dissipation efficiency in high-temperature and high-dust environments, and it is difficult to meet the heat dissipation needs of high-power-density equipment. It is also noisy and easily exposes targets.

[0004] Secondly, traditional liquid cooling is insufficient: the cooling capacity of traditional engine coolant circulation systems (single-phase liquid cooling) is severely limited by ambient temperature. In high-temperature environments such as deserts, the temperature difference between the radiator and the environment is small, and the heat dissipation capacity reaches a bottleneck, making it impossible to control the equipment temperature within the ideal range, thus affecting power generation efficiency and battery life.

[0005] Third, it has high energy consumption: In order to cope with the worst working conditions, the system's water pumps and fans are usually designed according to the maximum demand. Under most normal working conditions, they are in normal working condition, rather than the maximum demand design state. This will cause huge energy waste and shorten the vehicle's silent range.

[0006] Fourth, there is no backup measure: the liquid cooling system is usually supplied with liquid by a single pump. If the pump fails, the liquid cooling system will easily fail.

[0007] Therefore, in order to meet the needs of special vehicles and address the shortcomings of existing cooling solutions, it is essential to develop a liquid cooling system with strong cooling capacity, good environmental adaptability, and high energy efficiency. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to address the problems existing in the background art, thereby providing a cooling system based on compression refrigeration using liquid as a medium, solving the technical problem that the cooling needs of power generation and energy storage equipment cannot be met in the prior art, so as to meet the usage needs of special vehicles. Specifically, it is a cooling system and cooling method for power generation and energy storage equipment in special vehicles.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: a cooling system for a power generation and energy storage device for special vehicles, the cooling system including a refrigerant circuit and a cooling circuit connected through the refrigerant circuit; the cooling circuit is integrated into the power generation and energy storage device; The refrigerant circuit includes a liquid-cooled condenser, a compressor, a cooler, an evaporator, an expansion valve, and an expansion tank; the expansion valve includes a first expansion valve and a second expansion valve; and the expansion tank includes a first expansion tank and a second expansion tank. The liquid-cooled condenser is equipped with a refrigerant inlet pipe and a refrigerant outlet pipe, and the liquid-cooled condenser forms an external refrigerant circuit through the refrigerant inlet pipe and the refrigerant outlet pipe; The compressor, liquid-cooled condenser, evaporator, first expansion valve, first expansion tank and second expansion tank are connected in sequence to form a first refrigeration circuit, and a control valve is provided between the first expansion tank and the second expansion tank; while the cooler and the second expansion valve are connected in sequence to form a second refrigeration circuit, and the second refrigeration circuit is connected in parallel at both ends of the first expansion tank and the first expansion valve. The cooling circuit is connected to the refrigerant circuit through a first refrigeration circuit and an expansion tank, and the first refrigeration circuit and / or the second refrigeration circuit are used to cool the cooling circuit.

[0010] Furthermore, in the cooling system for a special vehicle power generation and storage device described in this invention, the compressor compresses the refrigerant in the external refrigerant circuit into a high-temperature, high-pressure gas, which is then condensed into a high-temperature, high-pressure liquid by the liquid-cooled condenser. The high-temperature, high-pressure liquid is throttled by the second expansion valve, becoming a low-temperature, low-pressure two-phase flow that enters the cooler. After absorbing heat and evaporating into a low-temperature, low-pressure gas by the cooler, it returns to the compressor through the expansion tank. Alternatively, the high-temperature, high-pressure liquid is throttled by the first expansion valve, becoming a low-temperature, low-pressure two-phase flow that enters the evaporator. After absorbing heat and evaporating into a low-temperature, low-pressure gas by the evaporator, it returns to the compressor through the expansion tank. Or, the high-temperature, high-pressure liquid is throttled by the first expansion valve, becoming a low-temperature, low-pressure two-phase flow that enters the evaporator. After absorbing heat and evaporating into a low-temperature, low-pressure gas by the evaporator, it returns to the compressor through the expansion tank. The cooling circuit is connected to the first refrigeration circuit and the expansion tank, utilizing the integrated cooling circuit within the power generation and storage device to cool the device.

[0011] Furthermore, the cooling system for a special vehicle power generation and storage device according to the present invention includes a vehicle battery cooling circuit, which includes a first cooling pipe, a reversing valve, and a one-way valve A; and the power generation and storage device includes a vehicle battery condenser corresponding to the vehicle battery cooling circuit. The reversing valve is installed in the first refrigeration circuit at the front end of the first expansion tank. The reversing valve, the vehicle battery condenser, the one-way valve A, and the second expansion tank are connected in sequence through the first cooling pipe to form the vehicle battery refrigeration circuit.

[0012] Furthermore, in the cooling system for power generation and energy storage equipment for special vehicles described in this invention, the cooling circuit further includes an electronic fan cooling circuit, which includes a second cooling pipe and a one-way valve B; and the power generation and energy storage equipment includes an electronic fan condenser corresponding to the electronic fan cooling circuit. The reversing valve, the electric fan condenser, the one-way valve B, and the second expansion tank are connected in sequence through the second cooling pipe to form an electric fan refrigeration circuit; wherein, the reversing valve is a three-position four-way reversing valve, wherein two valve ports are connected to the first refrigeration circuit, the third valve port is connected to the first cooling pipe, and the fourth valve port is connected to the second cooling pipe.

[0013] Furthermore, in the cooling system for power generation and energy storage equipment for special vehicles described in this invention, the cooling circuit further includes an electrically controlled cooling circuit, which includes an electrically controlled water pump, a one-way valve C, and a third cooling pipe; and the power generation and energy storage equipment includes an electrically controlled box condenser corresponding to the electrically controlled cooling circuit. The first expansion tank, the electrically controlled water pump, the electrically controlled box condenser, the one-way valve C, and the second expansion tank are connected in sequence through the third cooling pipe to form an electrically controlled cooling circuit.

[0014] Furthermore, in the cooling system for a special vehicle power generation and energy storage device described in this invention, the cooling circuit further includes a radiator cooling circuit, which includes a radiator water pump, a one-way valve D, and a fourth cooling pipe; and the power generation and energy storage device includes a radiator condenser corresponding to the radiator cooling circuit. The first expansion tank, radiator water pump, radiator condenser, one-way valve D, and second expansion tank are connected in sequence through the fourth cooling pipe to form a radiator cooling circuit.

[0015] Furthermore, the cooling system for a special vehicle power generation and storage device according to the present invention includes an air conditioning cooling circuit, which includes an air conditioning water pump, a one-way valve E, and a fifth cooling pipe; and the power generation and storage device includes an air conditioning cooling heat exchanger corresponding to the air conditioning cooling circuit. The first expansion tank, the air conditioning water pump, the air conditioning cooling heat exchanger, the one-way valve E, and the second expansion tank are connected in sequence through the fifth cooling pipe to form an air conditioning cooling circuit.

[0016] Furthermore, the cooling system for a special vehicle power generation and storage device according to the present invention includes a comprehensive cooling circuit, which includes a comprehensive water pump, a one-way valve F, and a sixth cooling pipe; and the power generation and storage device includes a comprehensive cooling heat exchanger corresponding to the comprehensive cooling circuit. The first expansion tank, the integrated water pump, the integrated cooling heat exchanger, the one-way valve F, and the second expansion tank are connected in sequence through the sixth cooling pipe to form an integrated cooling circuit.

[0017] Furthermore, in the cooling system for power generation and energy storage equipment for special vehicles described in this invention, the refrigerant circuit further includes a temperature sensor, a flow control valve, and a level detector. The temperature sensor is installed in the coolant inlet pipe of the external refrigerant circuit, the flow control valve is installed in the coolant outlet pipe of the external refrigerant circuit, and the level detector is installed on the inner wall of the second expansion tank; wherein, the refrigerant in the external refrigerant circuit is liquid water.

[0018] The present invention also provides a cooling method for a special vehicle power generation and energy storage device using the above-mentioned cooling system, the cooling method comprising the following steps: S1. Connect the refrigerant inlet pipe and refrigerant outlet pipe of the liquid-cooled condenser to form an external refrigerant circuit through the refrigerant inlet pipe, refrigerant outlet pipe and liquid-cooled condenser; S2. The compressor, liquid-cooled condenser, evaporator, first expansion valve, first expansion tank and second expansion tank are connected in sequence to form a first refrigeration circuit; at the same time, the cooler and the second expansion valve are connected in sequence to form a second refrigeration circuit, and the second refrigeration circuit is connected in parallel at both ends of the first expansion tank and the first expansion valve. S3. Compress the refrigerant using a compressor and discharge the high-temperature gaseous refrigerant; cool the high-temperature gaseous refrigerant through a liquid-cooled condenser to become a liquid refrigerant; and evaporate it into a low-temperature, low-pressure gas by absorbing heat through a cooler and / or evaporator. S4. The cooling circuit is connected to the refrigerant circuit through the first refrigeration circuit and the expansion tank. Through the cooling circuit integrated in the power generation and energy storage equipment, heat absorption is used to evaporate the gas into a low temperature and low pressure gas, thereby cooling down the power generation and energy storage equipment.

[0019] The cooling system and method for power generation and energy storage equipment in special vehicles, as described in this invention, have the following advantages compared to existing technologies: By configuring an external refrigerant circuit, and a first and second refrigeration circuit formed by an evaporator and a cooler, the cooling circuit is cooled by the first and / or second refrigeration circuits. When the entire system needs a significant increase in cooling efficiency, the cooling efficiency can be increased not only by adjusting the flow rate of the external refrigerant but also by adjusting its temperature. This greatly improves the overall cooling efficiency of the system, solving the technical problem in existing technologies where the cooling requirements of power generation and energy storage equipment cannot be met, thus satisfying the usage needs of special vehicles. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the cooling system described in this invention; Figure 2 This is a schematic diagram of the working mode of the cooler described in this invention; Figure 3 This is a schematic diagram of the working mode of the evaporator described in this invention; Figure 4 This is a schematic diagram of the structure in which the cooler and evaporator of the present invention operate simultaneously; Figure 5 This is a partial structural diagram of the power generation and energy storage device described in this invention. Figure 1 ; Figure 6 This is a partial structural diagram of the power generation and energy storage device described in this invention. Figure 2 .

[0022] The diagram shows: 1-Liquid-cooled condenser, 2-Compressor, 3-Cooler, 4-Evaporator, 5-Expansion valve, 51-First expansion valve, 52-Second expansion valve, 6-Expansion tank, 61-First expansion tank, 62-Second expansion tank, 7-On-board battery cooling circuit, 71-Reversing valve, 72-One-way valve A, 73-On-board battery condenser, 8-Electric fan cooling circuit, 81-One-way valve B, 82-Electric fan condenser, 9-Electrically controlled cooling circuit, 91-Electrically controlled water pump, 92-One-way valve B. Check valve C, 93-Electrical control box condenser, 10-Radiator cooling circuit, 101-Radiator water pump, 102-One-way valve D, 103-Radiator condenser, 11-Air conditioning cooling circuit, 1101-Air conditioning water pump, 1102-One-way valve E, 1103-Air conditioning cooling heat exchanger, 12-Comprehensive cooling circuit, 1201-Comprehensive water pump, 1202-One-way valve F, 1203-Comprehensive cooling heat exchanger, 13-Temperature sensor, 14-Flow control valve, 15-Level detector. Detailed Implementation

[0023] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0024] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness or purpose of the invention, should still fall within the scope of the disclosed technical content. Furthermore, the terms "upper," "lower," "left," and "right" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "provided with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0026] It should be noted that the term "comprising" or any other variation is intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus. Example 1

[0027] like Figure 1 As shown, this embodiment provides a cooling system for a power generation and energy storage device for special vehicles. The cooling system includes a refrigerant circuit and a cooling circuit connected through the refrigerant circuit; the cooling circuit is integrated into the power generation and energy storage device. The refrigerant circuit includes a liquid-cooled condenser 1, a compressor 2, a cooler 3, an evaporator 4, an expansion valve 5, and an expansion tank 6; the expansion valve 5 includes a first expansion valve 51 and a second expansion valve 52; and the expansion tank 6 includes a first expansion tank 61 and a second expansion tank 62. The liquid-cooled condenser 1 is equipped with a refrigerant inlet pipe and a refrigerant outlet pipe, and the liquid-cooled condenser 1 forms an external refrigerant circuit through the refrigerant inlet pipe and the refrigerant outlet pipe; The compressor 2, liquid-cooled condenser 1, evaporator 4, first expansion valve 51, first expansion tank 61 and second expansion tank 62 are sequentially connected to form a first refrigeration circuit, and a control valve is provided between the first expansion tank 61 and the second expansion tank 62; while the cooler 3 and the second expansion valve 52 are sequentially connected to form a second refrigeration circuit, and the second refrigeration circuit is connected in parallel at both ends of the first expansion tank 61 and the first expansion valve 51. The cooling circuit is connected to the refrigerant circuit through the first refrigeration circuit and the expansion tank 6, and the first refrigeration circuit and / or the second refrigeration circuit are used to cool the cooling circuit.

[0028] The power generation and energy storage equipment is equipped with a coolant inlet and a coolant outlet. The compressor 2 compresses the refrigerant in the external refrigerant circuit into a high-temperature, high-pressure gas, which is then condensed into a high-temperature, high-pressure liquid by the liquid-cooled condenser 1. The high-temperature, high-pressure liquid is throttled by the second expansion valve 52, becoming a low-temperature, low-pressure two-phase flow that enters the cooler 3. After absorbing heat and evaporating into a low-temperature, low-pressure gas by the cooler, it returns to the compressor 2 through the expansion tank 6. Alternatively, the high-temperature, high-pressure liquid is throttled by the first expansion valve 51, becoming a low-temperature, low-pressure two-phase flow that enters the evaporator 4. After absorbing heat and evaporating into a low-temperature, low-pressure gas by the evaporator, it returns to the compressor 2 through the expansion tank 6. The first refrigeration circuit and the expansion tank 6 are connected to the cooling circuit, and the cooling circuit integrated in the power generation and energy storage equipment is used to cool the power generation and energy storage equipment.

[0029] Meanwhile, the refrigerant circuit also includes a temperature sensor 13, a flow control valve 14, and a liquid level detector 15. The temperature sensor 13 is installed in the coolant inlet pipe of the external refrigerant circuit, the flow control valve 14 is installed in the coolant outlet pipe of the external refrigerant circuit, and the liquid level detector 15 is installed on the inner wall of the second expansion tank 62. The refrigerant in the external refrigerant circuit is liquid water.

[0030] By configuring an external refrigerant circuit, and a first refrigeration circuit and a second refrigeration circuit formed by an evaporator and a cooler, the evaporator 4 is used to achieve the advantages of high efficiency, fast cooling and rapid adjustment response when directly refrigerating. At the same time, the addition of a cooler 3 allows the refrigerant circuit to have three working modes as needed: single cooler 3 working, single evaporator 4 working, and cooler 3 and evaporator 4 working simultaneously.

[0031] Figure 2 A schematic diagram of the single cooler 3 operating mode provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the single evaporator 4 operating mode provided in an embodiment of the present invention; and Figure 4 This is a schematic diagram showing the simultaneous operation of the cooler 3 and the evaporator 4 according to an embodiment of the present invention. In specific implementation, its working principle is as follows: like Figure 2 As shown, in the single cooler 3 working mode, the refrigerant coming out of the compressor 2 is a high temperature and high pressure gas. After passing through the liquid-cooled condenser 1, it becomes a high pressure and high temperature liquid. After passing through the second expansion valve 52, it becomes a low pressure two-phase flow state. It enters the cooler 3 to absorb heat and evaporate into a low temperature and low pressure gas, and finally returns to the compressor 2.

[0032] like Figure 3 As shown, in the single evaporator 4 working mode, the refrigerant coming out of the compressor 2 is a high temperature and high pressure gas. It is condensed into a high pressure and high temperature liquid by the liquid-cooled condenser 1, and then throttled by the first expansion valve 51 to become a low pressure two-phase flow state. It enters the evaporator 4 to absorb heat and evaporate into a low temperature and low pressure gas, and finally returns to the compressor 2.

[0033] like Figure 4 As shown, in the mode where the cooler 3 and evaporator 4 are working simultaneously, the refrigerant coming out of the compressor 2 is a high-temperature and high-pressure gas. After being condensed into a high-pressure and high-temperature liquid by the liquid-cooled condenser 1, it is divided into two paths: one path is throttled by the second expansion valve 52 to become a low-pressure two-phase flow state, enters the cooler 3 to absorb heat and evaporate into a low-temperature and low-pressure gas, and finally returns to the compressor 2; the other path is throttled by the first expansion valve 51 to become a low-pressure two-phase flow state, enters the evaporator 4 to absorb heat and evaporate into a low-temperature and low-pressure gas, and finally returns to the compressor 2.

[0034] like Figure 5As shown, the cooling system for a special vehicle power generation and storage device provided in this embodiment includes a vehicle battery cooling circuit 7, which includes a first cooling pipe, a reversing valve 71, and a one-way valve A72. The power generation and storage device includes a vehicle battery condenser 73 corresponding to the vehicle battery cooling circuit 7. The reversing valve 71 is installed in the first refrigeration circuit at the front end of the first expansion tank 61. The reversing valve 71, the vehicle battery condenser 73, the one-way valve A72, and the second expansion tank 62 are sequentially connected through the first cooling pipe to form the vehicle battery refrigeration circuit 7.

[0035] Furthermore, the cooling system for a special vehicle power generation and storage device provided in this embodiment includes an electric fan cooling circuit 8, which includes a second cooling pipe and a one-way valve B81. The power generation and storage device includes an electric fan condenser 82 corresponding to the electric fan cooling circuit 8. The reversing valve 71, the electric fan condenser 82, the one-way valve B81, and the second expansion tank 62 are sequentially connected through the second cooling pipe to form the electric fan refrigeration circuit 8. The reversing valve 71 is a three-position four-way reversing valve, wherein two valve ports are connected to the first refrigeration circuit, the third valve port is connected to the first cooling pipe, and the fourth valve port is connected to the second cooling pipe.

[0036] like Figure 6 As shown, the cooling system for a power generation and storage device for a special vehicle provided in this embodiment includes an electrically controlled cooling circuit 9, which includes an electrically controlled water pump 91, a one-way valve C92, and a third cooling pipe. The power generation and storage device includes an electrically controlled box condenser 93 corresponding to the electrically controlled cooling circuit 9. The first expansion tank 61, the electrically controlled water pump 91, the electrically controlled box condenser 93, the one-way valve C92, and the second expansion tank 62 are sequentially connected through the third cooling pipe to form the electrically controlled cooling circuit 9.

[0037] Furthermore, the cooling system for a special vehicle power generation and energy storage device provided in this embodiment includes a radiator cooling circuit 10, which includes a radiator water pump 101, a one-way valve D102, and a fourth cooling pipe. The power generation and energy storage device includes a radiator condenser 103 corresponding to the radiator cooling circuit 10. The first expansion tank 61, the radiator water pump 101, the radiator condenser 103, the one-way valve D102, and the second expansion tank 62 are sequentially connected through the fourth cooling pipe to form the radiator cooling circuit 10.

[0038] Furthermore, the cooling system for a special vehicle power generation and energy storage device provided in this embodiment includes an air conditioning cooling circuit 11, which includes an air conditioning water pump 1101, a one-way valve E1102, and a fifth cooling pipe. The power generation and energy storage device includes an air conditioning cooling heat exchanger 1103 corresponding to the air conditioning cooling circuit 11. The first expansion tank 61, the air conditioning water pump 1101, the air conditioning cooling heat exchanger 1103, the one-way valve E1102, and the second expansion tank 62 are sequentially connected through the fifth cooling pipe to form the air conditioning cooling circuit 11.

[0039] Furthermore, the cooling system for a special vehicle power generation and storage device provided in this embodiment includes a comprehensive cooling circuit 12, which includes a comprehensive water pump 1201, a one-way valve F1202, and a sixth cooling pipe. The power generation and storage device includes a comprehensive cooling heat exchanger 1203 corresponding to the comprehensive cooling circuit 12. The first expansion tank 61, the comprehensive water pump 1201, the comprehensive cooling heat exchanger 1203, the one-way valve F1202, and the second expansion tank 62 are sequentially connected through the sixth cooling pipe to form the comprehensive cooling circuit 12. Example 2

[0040] This embodiment provides a cooling method for a special vehicle power generation and energy storage device using the above-mentioned cooling system, the cooling method comprising the following steps: S1. Connect the refrigerant inlet pipe and refrigerant outlet pipe configured in the liquid-cooled condenser 1 to form an external refrigerant circuit through the refrigerant inlet pipe, refrigerant outlet pipe and liquid-cooled condenser 1; S2. The compressor 2, liquid-cooled condenser 1, evaporator 4, first expansion valve 51, first expansion tank 61 and second expansion tank 62 are connected in sequence to form a first refrigeration circuit; at the same time, the cooler 3 and the second expansion valve 52 are connected in sequence to form a second refrigeration circuit, and the second refrigeration circuit is connected in parallel at both ends of the first expansion tank 61 and the first expansion valve 51. S3. Compress the refrigerant using compressor 2 and discharge the high-temperature gaseous refrigerant; cool the high-temperature gaseous refrigerant through liquid-cooled condenser 1 to become liquid refrigerant; and evaporate into low-temperature, low-pressure gas by absorbing heat through cooler 3 and / or evaporator 4. S4. The cooling circuit is connected to the refrigerant circuit through the first refrigeration circuit and the expansion box 6. Through the cooling circuit integrated in the power generation and energy storage equipment, the refrigerant is cooled down by absorbing heat and evaporating into a low-temperature and low-pressure gas.

[0041] like Figure 5 and Figure 6As shown, in specific applications, the cooling method provided by this invention, in the existing refrigerant system of a vehicle, since different power generation and energy storage devices are equipped with coolant inlets and outlets, when it is necessary to cool the power generation and energy storage devices such as the vehicle battery, electric fan, and electronic control device, it is only necessary to start the corresponding cooling circuit. The compressor 2 compresses the refrigerant into a high-temperature gaseous refrigerant, and the high-temperature gaseous refrigerant is cooled by the liquid-cooled condenser 1 and becomes a liquid refrigerant. Finally, it absorbs heat and evaporates into a low-temperature, low-pressure gas through the cooler 3 and / or evaporator 4, thereby realizing heat exchange with the power generation and energy storage devices. This can further increase the efficiency of heat exchange and achieve the purpose of cooling.

[0042] Therefore, by adopting the cooling system and cooling method provided by the present invention, since the liquid-cooled condenser 1 is equipped with a refrigerant inlet pipe and a refrigerant outlet pipe, the liquid-cooled condenser 1 forms an external refrigerant circuit through the refrigerant inlet pipe and the refrigerant outlet pipe. The refrigerant inlet pipe and the refrigerant outlet pipe can be connected to the existing external refrigerant supply equipment of the vehicle. The external refrigerant can be water, which has a controllable water supply pipe and a drain pipe. By introducing the external refrigerant, the cooling efficiency of the entire system can be greatly improved.

[0043] In summary, the cooling system and method described in this invention utilize an external refrigerant circuit, a first refrigeration circuit formed by an evaporator and a cooler, and a second refrigeration circuit. The cooling circuit is cooled by the first and / or second refrigeration circuit. When the entire system requires a significant increase in cooling efficiency, the cooling efficiency can be increased not only by adjusting the flow rate of the external refrigerant but also by adjusting its temperature. This greatly improves the overall cooling efficiency of the system, solving the technical problem in the prior art where the cooling requirements of power generation and energy storage equipment cannot be met, thus satisfying the needs of special vehicles.

[0044] Other aspects of this invention that are not detailed herein are conventional techniques known to those skilled in the art, and therefore are not described in detail.

[0045] The scope of protection of this invention is not limited to the technical solutions disclosed in the specific embodiments. The above description is only a preferred embodiment of this invention and does not limit this invention. Any minor modifications, equivalent substitutions and improvements made based on the technical solutions of this invention should be included within the scope of protection of the technical solutions of this invention.

Claims

1. A cooling system for a special vehicle power generation and energy storage device, characterized by: The cooling system comprises a refrigerant circuit and a cooling circuit connected by the refrigerant circuit; the cooling circuit is integrated in the power generation and energy storage device; The refrigerant circuit comprises a liquid-cooled condenser, a compressor, a cooler, an evaporator, a first expansion valve and a first expansion tank, and a second expansion valve and a second expansion tank; the first expansion valve and the second expansion valve are provided; the first expansion tank and the second expansion tank are provided; The liquid-cooled condenser is provided with a refrigerant inlet pipeline and a refrigerant outlet pipeline, and the liquid-cooled condenser forms an external refrigerant circuit through the refrigerant inlet pipeline and the refrigerant outlet pipeline; The compressor, the liquid-cooled condenser, the evaporator, the first expansion valve, the first expansion tank and the second expansion tank are sequentially connected to form a first refrigeration circuit, and a control valve is arranged between the first expansion tank and the second expansion tank; the cooler and the second expansion valve are sequentially connected to form a second refrigeration circuit, and the second refrigeration circuit is connected in parallel between the first expansion tank and the first expansion valve. The cooling circuit is connected with the refrigerant circuit through the first refrigeration circuit and the expansion tank, and cooling is realized by the first refrigeration circuit and / or the second refrigeration circuit.

2. The cooling system for the power generation and energy storage device of the special vehicle according to claim 1, characterized in that: The compressor compresses the refrigerant in the external refrigerant circuit into a high-temperature and high-pressure gas, which is condensed into a high-temperature and high-pressure liquid through the liquid-cooled condenser, and the high-temperature and high-pressure liquid is throttled by the second expansion valve to become a low-temperature and low-pressure two-phase flow into the cooler, and then evaporated into a low-temperature and low-pressure gas through the heat absorption of the cooler and returned to the compressor through the expansion tank, and / or the high-temperature and high-pressure liquid is throttled by the first expansion valve to become a low-temperature and low-pressure two-phase flow into the evaporator, and then evaporated into a low-temperature and low-pressure gas through the heat absorption of the evaporator and returned to the compressor through the expansion tank, and the cooling circuit is connected with the first refrigeration circuit and the expansion tank, and the cooling circuit integrated in the power generation and energy storage device is used to cool the power generation and energy storage device.

3. The cooling system for the power generation and energy storage device of the special vehicle according to claim 2, characterized in that: The cooling circuit comprises a vehicle battery cooling circuit, the vehicle battery cooling circuit comprises a first cooling pipeline, a reversing valve and a one-way valve A, and the power generation and energy storage device comprises a vehicle battery condenser corresponding to the vehicle battery cooling circuit. The reversing valve is installed in the first refrigeration circuit at the front end of the first expansion tank, and the reversing valve, the vehicle battery condenser, the one-way valve A and the second expansion tank are sequentially connected through the first cooling pipeline to form a vehicle battery refrigeration circuit.

4. The cooling system for the power generation and energy storage device of the special vehicle according to claim 3, characterized in that: The cooling circuit further comprises an electronic fan cooling circuit, the electronic fan cooling circuit comprises a second cooling pipeline and a one-way valve B, and the power generation and energy storage device comprises an electronic fan condenser corresponding to the electronic fan cooling circuit. The reversing valve, the electronic fan condenser, the one-way valve B and the second expansion tank are sequentially connected through the second cooling pipeline to form an electronic fan refrigeration circuit; wherein the reversing valve is a three-position four-way reversing valve, two valve ports are communicated with the first refrigeration circuit, the third valve port is communicated with the first cooling pipeline, and the fourth valve port is communicated with the second cooling pipeline.

5. The cooling system for the power generation and energy storage device of the special vehicle according to claim 4, characterized in that: The cooling circuit further comprises an electrically controlled cooling circuit, the electrically controlled cooling circuit comprises an electrically controlled water pump, a check valve C and a third cooling pipeline; and the power generation and energy storage device comprises an electrically controlled box condenser corresponding to the electrically controlled cooling circuit. The first expansion tank, the electrically controlled water pump, the electrically controlled box condenser, the check valve C and the second expansion tank are sequentially connected through the third cooling pipeline to form the electrically controlled cooling circuit.

6. The cooling system for the power generation and energy storage device of the special vehicle according to claim 5, characterized in that: The cooling circuit further comprises a radiator cooling circuit, the radiator cooling circuit comprises a radiator water pump, a check valve D and a fourth cooling pipeline; and the power generation and energy storage device comprises a radiator condenser corresponding to the radiator cooling circuit. The first expansion tank, the radiator water pump, the radiator condenser, the check valve D and the second expansion tank are sequentially connected through the fourth cooling pipeline to form the radiator cooling circuit.

7. The cooling system for the power generation and energy storage device of the special vehicle according to claim 6, characterized in that: The cooling circuit further comprises an air conditioner cooling circuit, the air conditioner cooling circuit comprises an air conditioner water pump, a check valve E and a fifth cooling pipeline; and the power generation and energy storage device comprises an air conditioner cooling heat exchanger corresponding to the air conditioner cooling circuit. The first expansion tank, the air conditioner water pump, the air conditioner cooling heat exchanger, the check valve E and the second expansion tank are sequentially connected through the fifth cooling pipeline to form the air conditioner cooling circuit.

8. The cooling system for the power generation and energy storage device of the special vehicle according to claim 7, characterized in that: The cooling circuit further comprises a comprehensive cooling circuit, the comprehensive cooling circuit comprises a comprehensive water pump, a check valve F and a sixth cooling pipeline; and the power generation and energy storage device comprises a comprehensive cooling heat exchanger corresponding to the comprehensive cooling circuit. The first expansion tank, the comprehensive water pump, the comprehensive cooling heat exchanger, the check valve F and the second expansion tank are sequentially connected through the sixth cooling pipeline to form the comprehensive cooling circuit.

9. The cooling system for the power generation and energy storage device of the special vehicle according to claim 1, characterized in that: The refrigerant circuit further comprises a temperature sensor, a flow control valve and a liquid level detector, the temperature sensor is arranged in a cooling liquid inlet pipeline on the external refrigerant circuit, the flow control valve is arranged in a cooling liquid outlet pipeline on the external refrigerant circuit, and the liquid level detector is arranged on the inner side wall of the second expansion tank; wherein the refrigerant in the external refrigerant circuit is liquid water.

10. The cooling method of the cooling system according to any one of claims 1 to 9, characterized by: The cooling method comprises the following steps: S1. connecting the refrigerant inlet pipeline and the refrigerant outlet pipeline of the liquid cooling condenser configuration, and forming an external refrigerant circuit through the refrigerant inlet pipeline, the refrigerant outlet pipeline and the liquid cooling condenser; S2. sequentially connecting the compressor, the liquid cooling condenser, the evaporator, the first expansion valve, the first expansion tank and the second expansion tank to form a first refrigeration circuit; at the same time, sequentially connecting the cooler and the second expansion valve to form a second refrigeration circuit, the second refrigeration circuit being connected in parallel between the two ends of the first expansion tank and the first expansion valve; S3. compressing the refrigerant by the compressor and discharging high-temperature gaseous refrigerant; cooling the high-temperature gaseous refrigerant by the liquid cooling condenser to become liquid refrigerant; and evaporating into low-temperature and low-pressure gas by absorbing heat through the cooler and / or the evaporator; S4. connecting the cooling circuit through the first refrigeration circuit and the expansion tank with the refrigerant circuit, and using the low-temperature and low-pressure gas evaporated by absorbing heat to realize cooling of the power generation and energy storage device.

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