Heat pump system for mobile spaces

Abstract

This application discloses a heat pump system for mobile spaces, belonging to the field of heat pump technology. The heat pump system includes a first circulation loop, a second circulation loop, a valve assembly, and a control unit. The first circulation loop includes a first pipeline, a compressor, and a water-side heat exchange unit; the second circulation loop includes a second pipeline connected to the water-side heat exchange unit, which is used for heat exchange between the first and second heat exchange media; the control unit controls the valve assembly to enable the heat pump system to operate in different operating modes, including cooling mode, heating mode, hot water mode, a combined cooling and hot water mode, and a combined heating and hot water mode. The heat pump system of this application can integrate cooling, heating, and hot water functions in a single heat pump system and can operate in different operating modes, thereby reducing the complexity of the heat pump system, the number of devices, and the installation space required.

Description

Technical Field

[0001] This application relates to the field of heat pump technology, and more particularly to a heat pump system for mobile spaces. Background Technology

[0002] With the improvement of people's living standards and the diversification of travel methods, the market demand for mobile spaces, as a type of mobile tool that integrates living and transportation functions, is growing day by day. Taking RVs as an example, RV users are also demanding higher and higher levels of comfort in the vehicle's interior environment, including basic functions such as summer cooling, winter heating, and hot water supply for daily life.

[0003] In related technologies, the cooling, heating and hot water functions are implemented by multiple independent systems. The system structure is complex, and multiple devices and pipelines need to be arranged in the limited space inside the vehicle, which makes installation difficult and encroaches on living space. Summary of the Invention

[0004] This application provides a heat pump system for mobile spaces that integrates cooling, heating, and hot water functions in a single heat pump system. It can operate in different modes, thereby reducing the complexity of the heat pump system, the number of devices, and the installation space.

[0005] To achieve the above objectives, according to a first aspect of this application, a heat pump system for mobile spaces is provided, comprising: The first circulation loop includes a first pipeline and a compressor and a water-side heat exchange unit connected through the first pipeline, wherein the first pipeline is used to supply the flow of a first heat exchange medium. The second circulation loop includes a second pipeline for supplying the flow of the second heat exchange medium. The second pipeline is connected to the water-side heat exchange unit, which is used for heat exchange between the first heat exchange medium and the second heat exchange medium. Valve assembly; The control unit is used to control the valve assembly so that the heat pump system operates in different operating modes, including cooling mode, heating mode, hot water mode, combined cooling and hot water mode, and combined heating and hot water mode.

[0006] Optionally, the first circulation loop further includes a first heat exchanger, a throttling device, and a second heat exchanger. The first heat exchanger is used to exchange heat with the outside air, and the second heat exchanger is used to exchange heat with the inside air. The valve assembly includes a valve island, which is disposed in the first pipeline, and the valve island includes a plurality of control valves. Specifically, the control unit controls the opening of a portion of the control valves on the valve island, causing the first heat exchange medium at the compressor outlet to flow sequentially through the first heat exchanger, the throttling device, and the second heat exchanger, thereby achieving cooling and / or hot water functions; or... The control unit controls the opening of another part of the control valves on the valve island, so that the first heat exchange medium at the compressor outlet flows sequentially through the second heat exchanger, the throttling device and the first heat exchanger to achieve the heating function and / or hot water function.

[0007] Optionally, the valve island includes a first control valve, a second control valve, a third control valve, and a fourth control valve; The control unit controls the opening of the first control valve and the fourth control valve, and controls the closing of the second control valve and the third control valve, so that the first heat exchange medium at the compressor outlet flows sequentially through the first heat exchanger, the throttling device and the second heat exchanger to achieve the cooling function and / or hot water function. The control unit controls the opening of the second and third control valves and the closing of the first and fourth control valves, so that the first heat exchange medium at the compressor outlet flows sequentially through the second heat exchanger, the throttling device and the first heat exchanger to achieve the heating function and / or hot water function.

[0008] Optionally, the water-side heat exchange unit includes a third heat exchanger, which is connected to the first pipeline and the second pipeline respectively, and is used to allow the first heat exchange medium and the second heat exchange medium to exchange heat.

[0009] Optionally, the water-side heat exchange unit further includes a fourth heat exchanger, which is used for heat exchange between the first heat exchange medium and the third heat exchange medium. The heat pump system further includes a third circulation loop, which comprises a third pipeline and a first drive pump. The first drive pump and the fourth heat exchanger are sequentially connected through the third pipeline. The third pipeline is used to supply the flow of the third heat exchange medium, which exchanges heat with the internal air through the third pipeline; or... The heat pump system further includes a third circulation loop, which includes a third pipeline, a first drive pump, and a fifth heat exchanger. The first drive pump, the fourth heat exchanger, and the fifth heat exchanger are connected sequentially through the third pipeline. The third pipeline is used to supply the flow of the third heat exchange medium, and the fifth heat exchanger is used to exchange heat with the internal air.

[0010] Optionally, the water-side heat exchange unit is located downstream of the compressor, and the third heat exchanger and the fourth heat exchanger are connected in parallel; The valve assembly further includes a fifth control valve and a sixth control valve. The fifth control valve is located between the outlet end of the compressor and the first liquid inlet of the third heat exchanger, and the sixth control valve is located between the outlet end of the compressor and the third liquid inlet of the fourth heat exchanger; and / or, The valve assembly further includes a seventh control valve, which is located on one side of the first liquid outlet of the third heat exchanger.

[0011] Optionally, the second circulation loop further includes at least one hot water storage unit and a second drive pump. The hot water storage unit is connected to the water-side heat exchange unit through the second pipeline. The second drive pump is used to drive the second heat exchange medium to be heated to flow sequentially through the water-side heat exchange unit and the hot water storage unit. The valve assembly includes an eighth control valve, which is located at the outlet end of the second drive pump; and / or, The second circulation loop further includes a first electric heating unit, which is used to heat the second heat exchange medium in the second circulation loop.

[0012] Optionally, the hot water storage unit has a fifth liquid inlet, which is connected to the outlet of the water-side heat exchange unit; The hot water storage unit also has a fifth outlet, through which hot water within the storage unit is delivered to the user; and / or, The hot water storage unit also has a sixth liquid outlet, which is connected to the inlet of the water-side heat exchange unit. The second heat exchange medium in the hot water storage unit is transported to the inlet of the water-side heat exchange unit through the sixth liquid outlet, so that the second heat exchange medium circulates between the hot water storage unit and the water-side heat exchange unit.

[0013] Optionally, the second circulation loop further includes at least one cold water storage unit and a third drive pump. The cold water storage unit is connected to the water-side heat exchange unit through the second pipeline, and the third drive pump is used to drive the second heat exchange medium to be heated in the cold water storage unit to the water-side heat exchange unit. The valve assembly includes a ninth control valve, which is located at the outlet end of the third drive pump.

[0014] Optionally, the heat pump system further includes a second electric heating unit for exchanging heat with the internal air.

[0015] Optionally, the heat pump system uses a DC power supply or an AC power supply; and / or, The first heat exchange medium is carbon dioxide refrigerant.

[0016] In the heat pump system for mobile spaces described in this application, by setting up a first circulation loop and a second circulation loop, the integrated cooling, heating, and domestic hot water functions are achieved within a single heat pump system. Compared to solutions using multiple independent devices, this application reduces system complexity, the number of devices and installation space, and achieves unified energy management and distribution, thereby improving the operating efficiency of the heat pump system. The control unit controls the valve assembly to enable the heat pump system to operate in different modes, including cooling mode, heating mode, hot water mode, a combined cooling and hot water mode, and a combined heating and hot water mode. Through the coordinated control of the control unit, the heat pump system can flexibly switch between different operating modes within a single device, meeting the thermal management needs of the RV in different usage scenarios.

[0017] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0020] Figure 1 This is a schematic diagram of the structure of a heat pump system for mobile space provided in an exemplary embodiment of this application; Figure 2 This is a schematic diagram of a heat pump system for mobile space provided in an exemplary embodiment of this application in cooling mode; Figure 3 This is another structural schematic diagram of the heat pump system for mobile space provided in the exemplary embodiment of this application when it is in cooling mode; Figure 4 This is a schematic diagram of the structure of a heat pump system for mobile space provided in an exemplary embodiment of this application when it is in a combined cooling and hot water mode; Figure 5 This is a schematic diagram of the structure of a heat pump system for mobile space provided in an exemplary embodiment of this application when it is in hot water mode; Figure 6This is a schematic diagram of a heat pump system for mobile space provided in an exemplary embodiment of this application in heating mode; Figure 7 This is another structural schematic diagram of the heat pump system for mobile space provided in the exemplary embodiment of this application when it is in heating mode; Figure 8 This is a schematic diagram of the structure of a heat pump system for mobile space provided in an exemplary embodiment of this application when it is in a combined heating and hot water mode.

[0021] Explanation of reference numerals in the attached figures: 1. First circulation loop; 11. First pipeline; 12. Compressor; 13. Water-side heat exchange unit; 131. Third heat exchanger; 1311. First liquid inlet; 1312. First liquid outlet; 1313. Second liquid inlet; 1314. Second liquid outlet; 132. Fourth heat exchanger; 1321. Third liquid inlet; 1322. Third liquid outlet; 1323. Fourth liquid inlet; 1324. Fourth liquid outlet; 14. First heat exchanger; 15. Throttling device; 16. Second heat exchanger; 17. Gas-liquid separator; 18. Intermediate heat exchanger; 2. Second circulation loop; 21. Second pipeline; 22. Hot water storage unit; 221. Fifth liquid inlet; 222. Fifth liquid outlet; 223. 23. Six liquid outlets; 24. Second drive pump; 25. First electric heating unit; 26. Cold water storage unit; 37. Third drive pump; 38. Valve assembly; 39. Valve island; 30. First control valve; 31. Second control valve; 32. Third control valve; 33. Sixth control valve; 34. Seventh control valve; 35. Eighth control valve; 36. Ninth control valve; 37. Tenth control valve; 4. Control unit; 50. Third circulation loop; 51. Third pipeline; 52. First drive pump; 53. Fifth heat exchanger; 54. Third heat exchange medium storage unit; 6. Second electric heating unit; 7. Detection assembly; 8. First fan; 9. Second fan. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0023] In this application, unless otherwise expressly specified and limited, the terms "connected," "linked," "stacked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] This application provides a heat pump system for mobile spaces, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, in the following embodiments, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0025] According to the first aspect of this application, referring to Figure 1 One embodiment of this application provides a heat pump system for mobile spaces, such as mobile living cabins, ships, vehicles, etc. Vehicles are, for example, motorhomes; in this application, a motorhome will be used as an example for description. The heat pump system for mobile spaces may include: a first circulation loop 1, a second circulation loop 2, a valve assembly 3, and a control unit 4.

[0026] Specifically, refer to Figure 1 The first circulation loop 1 may include a first pipeline 11 and a compressor 12 and a water-side heat exchange unit 13 connected through the first pipeline 11. The first pipeline 11 is used to supply the flow of the first heat exchange medium, forming a closed-loop system. Driven by the compressor 12, the first heat exchange medium circulates in the first pipeline 11, and heat transfer is achieved through phase change (evaporation absorbs heat, condensation releases heat). The first heat exchange medium can be carbon dioxide (R744) refrigerant, which has the advantages of being environmentally friendly, having good low-temperature heating performance, and high system energy efficiency, and is especially suitable for application scenarios such as RVs where space and energy consumption requirements are high.

[0027] Compressor 12 is the power source for the circulation of the first heat exchange medium, used to compress the low-temperature, low-pressure gaseous first heat exchange medium into a high-temperature, high-pressure gaseous first heat exchange medium. In this embodiment, compressor 12 can be a DC inverter scroll compressor or a DC inverter rotor compressor, etc. Compressor 12 can communicate with control unit 4 and can adjust its power according to the instructions of control unit 4, thereby adjusting the cooling / heating capacity and realizing on-demand energy output. Since the RV power system is usually DC (battery), using a DC compressor can be powered by the battery without the need for an inverter, thereby reducing energy loss.

[0028] In some embodiments, refer to Figure 1 The first circulation loop 1 may further include a first heat exchanger 14, a throttling device 15, and a second heat exchanger 16. The first heat exchanger 14 is used for heat exchange with the outside air, that is, the first heat exchanger 14 is used for heat exchange with the air outside the vehicle. In cooling mode, the first heat exchanger 14 can act as a condenser to dissipate heat to the outside environment. In heating mode, the first heat exchanger 14 can act as an evaporator to absorb heat from the outside environment. To achieve heat exchange with the outside air, the first heat exchanger 14 can be installed on the exterior of the RV (such as on the roof or side). The heat pump system may also be equipped with a second fan 9 corresponding to the first heat exchanger 14. The second fan 9 is used to drive the outside air to flow through the first heat exchanger 14 to improve the heat exchange effect. The first heat exchanger 14 may be a microchannel parallel flow heat exchanger or a tube-fin heat exchanger, etc.

[0029] The second heat exchanger 16 is used for heat exchange with the interior air, specifically, for heat exchange with the air inside the vehicle. To achieve heat exchange with the interior air, the second heat exchanger 16 can be installed in the air conditioning duct inside the RV. In cooling mode, the second heat exchanger 16 acts as an evaporator to absorb heat from the interior air, achieving cooling. In heating mode, the second heat exchanger 16 acts as a condenser to release heat to the interior air, achieving heating. The heat pump system can also be equipped with a first fan 8 corresponding to the second heat exchanger 16. The first fan 8 is used to drive the interior air to flow through the second heat exchanger 16 to improve the heat exchange effect. The second heat exchanger 16 can be a microchannel parallel flow heat exchanger or a tube-fin heat exchanger, etc.

[0030] The throttling device 15 can be installed in the first pipeline 11 to throttle and reduce the pressure of the high-pressure liquid first heat exchange medium, making it a low-temperature, low-pressure gas-liquid mixture. The throttling device 15 can be located between the first heat exchanger 14 and the second heat exchanger 16. In this embodiment, the throttling device 15 can be communicatively connected to the control unit 4, and its opening degree can be precisely adjusted by the control unit 4 according to the operating parameters of the heat pump system (such as superheat, exhaust temperature, pressure, etc.) to adapt to the flow requirements of the first heat exchange medium under different operating conditions. The throttling device 15 can be an electronic expansion valve, which has advantages such as fast response, wide adjustment range, and high control accuracy. In other embodiments, the throttling device 15 can also be a thermostatic expansion valve or a capillary tube.

[0031] The first circulation loop 1 may further include a gas-liquid separator 17 and an intermediate heat exchanger 18. The gas-liquid separator 17 may be connected in series at the inlet end of the compressor 12 to separate the liquid components in the first heat exchange medium, preventing the liquid first heat exchange medium from being sucked into the compressor 12 and causing liquid slugging damage. The intermediate heat exchanger 18 may be installed in the first pipeline 11, located between the first heat exchanger 14 and the throttling device 15, to improve the circulation efficiency of the heat pump system by utilizing the mutual heat exchange between the high and low pressure first heat exchange mediums.

[0032] The intermediate heat exchanger 18 can be a heat exchanger with two independent flow channels inside. One flow channel is for the high-temperature, high-pressure liquid first heat exchange medium flowing out of the condenser (or air cooler), and the other flow channel is for the low-temperature, low-pressure gas first heat exchange medium flowing out of the evaporator. The two exchange heat. Through the intermediate heat exchanger 18, the subcooling degree of the first heat exchange medium entering the throttling device 15 can be increased, and at the same time, the superheating degree of the first heat exchange medium entering the compressor 12 can be increased, thereby improving the cooling / heating capacity and energy efficiency ratio of the system.

[0033] Reference Figure 1 The second circulation loop 2 is used to produce domestic hot water and store or directly supply it to the user. The second circulation loop 2 may include a second pipe 21 for supplying a second heat exchange medium, such as water. The second pipe 21 may be connected to a water-side heat exchange unit 13, which is used for heat exchange between the first and second heat exchange media. It is understood that the water-side heat exchange unit 13 is connected to the first pipe 11 and also to the second pipe 21. The first and second heat exchange media can exchange heat within the water-side heat exchange unit 13. Through this heat exchange process, heat in the first circulation loop 1 is transferred to the second heat exchange medium in the second circulation loop 2, thereby heating the domestic water and achieving the hot water function.

[0034] Reference Figure 1 The valve assembly 3 can be installed in the first pipeline 11 and / or the second pipeline 21 to control the flow path of the first heat exchange medium and / or the second heat exchange medium. The valve assembly 3 can be communicatively connected to the control unit 4.

[0035] Control unit 4 is the core of the heat pump system. It can be a microcontroller such as a single-chip microcomputer, DSP (Digital Signal Processor), or ARM (Advanced RISC Machine), and can integrate necessary drive circuits (not shown), signal conditioning circuits (not shown), and communication interfaces (not shown). Control unit 4 can issue control commands based on preset control strategies and real-time detected operating parameters to achieve automatic operation of the heat pump system.

[0036] Control unit 4 controls valve assembly 3 to enable the heat pump system to operate in different modes, including cooling mode, heating mode, hot water mode, combined cooling and hot water mode, and combined heating and hot water mode. Through the coordinated control of control unit 4, the heat pump system can flexibly switch between different operating modes within a single device to meet the thermal management needs of the RV in different usage scenarios. As an example, refer to... Figure 2 and Figure 3In standalone cooling mode, it only provides cooling for the vehicle interior and does not produce hot water. (See reference...) Figure 4 In the combined cooling and hot water mode, it simultaneously cools the vehicle interior and produces domestic hot water. (Refer to...) Figure 5 In standalone hot water mode, only domestic hot water is produced; the interior temperature is not adjusted. (Refer to...) Figure 6 and Figure 7 In standalone heating mode, it only provides heating inside the vehicle and does not produce hot water. (See reference...) Figure 8 In the combined heating and hot water mode, the vehicle can simultaneously provide in-vehicle heating and produce domestic hot water.

[0037] In some embodiments, the control unit 4 can also dynamically adjust the power of the compressor 12 and the priority of each operating mode based on parameters such as the RV battery charge, external power supply status, hot water temperature, and interior temperature. For example, when the battery charge is low and there is no external power supply, the control unit 4 can prioritize meeting the basic needs of cooling or heating, appropriately reducing the hot water heating rate or using only electric heating as an auxiliary method. When there are simultaneous needs for cooling and hot water, or simultaneous needs for heating and hot water, the control unit 4 can coordinately control the power of the compressor 12, the opening of the throttling device 15, the water pump flow rate, and the fan speed according to a preset load priority strategy to achieve energy distribution among different loads.

[0038] In this application, by setting up a first circulation loop 1 and a second circulation loop 2, the integrated cooling, heating, and domestic hot water functions are achieved within a single heat pump system. Compared to solutions using multiple independent devices, this application reduces system complexity, the number of devices and installation space, and achieves unified energy management and distribution, thereby improving the operating efficiency of the heat pump system. The control unit 4 controls the valve assembly 3 to enable the heat pump system to operate in different modes, including cooling mode, heating mode, hot water mode, a combined cooling and hot water mode, and a combined heating and hot water mode. Through the coordinated control of the control unit 4, the heat pump system can flexibly switch between different operating modes within a single device, meeting the thermal management needs of the RV in different usage scenarios.

[0039] In some embodiments, refer to Figure 1 The valve assembly 3 may include a valve island 31, which may be disposed in the first pipeline 11. The valve island 31 may be located downstream of the water-side heat exchange unit 13, between the first heat exchanger 14 and the second heat exchanger 16.

[0040] Valve island 31 includes multiple control valves. By controlling the opening and closing combinations of these control valves, the flow direction of the first circulation loop 1 can be switched, thereby achieving the switching of different operating modes, namely, the switching between cooling mode and heating mode. Specifically, by controlling a portion of the control valves of valve island 31 through control unit 4, the first heat exchange medium at the compressor 12 outlet flows sequentially through the first heat exchanger 14, the throttling device 15, and the second heat exchanger 16 to achieve cooling and / or hot water functions; or, by controlling another portion of the control valves of valve island 31 through control unit 4, the first heat exchange medium at the compressor 12 outlet flows sequentially through the second heat exchanger 16, the throttling device 15, and the first heat exchanger 14 to achieve heating and / or hot water functions.

[0041] In some embodiments, refer to Figure 1 The valve island 31 may include a first control valve 311, a second control valve 312, a third control valve 313, and a fourth control valve 314. The first control valve 311, the second control valve 312, the third control valve 313, and the fourth control valve 314 can all be solenoid valves, etc., and can be controlled to open and close by the control unit 4. As an example, the first control valve 311, the second control valve 312, the third control valve 313, and the fourth control valve 314 can be connected in a bridge circuit configuration. The first control valve 311, the third control valve 313, the fourth control valve 314, and the second control valve 312 can be sequentially connected through the first pipeline 11 to form a closed loop. The second control valve 312 is connected in parallel with the first control valve 311, and the first control valve 311 and the second control valve 312 can be located downstream of the water-side heat exchange unit 13.

[0042] Among them, reference Figures 2 to 4 The control unit 4 controls the opening of the first control valve 311 and the fourth control valve 314, and controls the closing of the second control valve 312 and the third control valve 313. This causes the first heat exchange medium at the compressor 12 outlet to flow sequentially through the first heat exchanger 14, the throttling device 15, and the second heat exchanger 16, and then return to the inlet of the compressor 12, thereby achieving cooling and / or hot water functions. In this mode, the first heat exchange medium dissipates heat to the external environment in the first heat exchanger 14 and absorbs heat from the vehicle interior in the second heat exchanger 16, achieving vehicle interior cooling. The first heat exchange medium can also exchange heat with the second heat exchange medium in the water-side heat exchange unit 13 to achieve hot water functions.

[0043] Reference Figures 5 to 8The control unit 4 controls the opening of the second control valve 312 and the third control valve 313, and controls the closing of the first control valve 311 and the fourth control valve 314. This causes the first heat exchange medium at the compressor 12 outlet to flow sequentially through the second heat exchanger 16, the throttling device 15, and the first heat exchanger 14, and then return to the inlet of the compressor 12, thereby achieving heating and / or hot water functions. In this mode, the first heat exchange medium absorbs heat from the external environment in the first heat exchanger 14 and releases heat into the vehicle interior in the second heat exchanger 16, achieving vehicle interior heating. The first heat exchange medium can also exchange heat with the second heat exchange medium in the water-side heat exchange unit 13 to achieve hot water functions.

[0044] In some embodiments, refer to Figure 1 The water-side heat exchange unit 13 may include a third heat exchanger 131, which can be connected to the first pipeline 11 and the second pipeline 21 respectively. The third heat exchanger 131 is used for heat exchange between the first heat exchange medium and the second heat exchange medium. The third heat exchanger 131 can be a plate heat exchanger or a shell-and-tube heat exchanger, etc., to realize direct or indirect heat exchange between the first heat exchange medium and the second heat exchange medium. In this embodiment, the third heat exchanger 131 is a plate heat exchanger, which has the characteristics of compact structure and high heat exchange efficiency, and is particularly suitable for installation in the limited space of a motorhome. The interior of the third heat exchanger 131 has a first heat exchange medium flow channel and a second heat exchange medium flow channel that are isolated from each other. When the first heat exchange medium flows through the first heat exchange medium flow channel, it transfers heat to the second heat exchange medium in the second heat exchange medium flow channel, thereby heating the second heat exchange medium. The third heat exchanger 131 may have a first inlet 1311 and a first outlet 1312 communicating with the first heat exchange medium flow channel, both of which are connected to the first pipeline 11. The third heat exchanger 131 may also have a second inlet 1313 and a second outlet 1314 communicating with the second heat exchange medium flow channel, both of which are connected to the second pipeline 21. To enhance the heat exchange effect, the flow direction of the second heat exchange medium in the third heat exchanger 131 is opposite to that of the first heat exchange medium in the third heat exchanger 131, i.e., a counter-current arrangement is adopted.

[0045] In some embodiments, refer to Figure 1The water-side heat exchange unit 13 may further include a fourth heat exchanger 132, which is used for heat exchange between the first and third heat exchange media. The third heat exchange media may be, for example, a coolant, such as a mixture of water and ethylene glycol, which has antifreeze and anti-corrosion properties. The heat pump system may also include a third circulation loop 5. By setting up the third circulation loop 5, thermal decoupling can be achieved between the third circulation loop 5 and the first circulation loop 1, improving the flexibility of system layout. Simultaneously, the third heat exchange media, as an intermediate medium, facilitates a more uniform indoor temperature distribution. Furthermore, the third heat exchange media and the first heat exchange media can exchange heat through the fourth heat exchanger 132, eliminating the need to extend the first pipe 11 throughout the vehicle. This shortens the length of the first pipe 11, reduces the risk of leakage of the first heat exchange media, and facilitates flexible arrangement of components within the limited space of the RV.

[0046] The third circulation loop 5 may include a third pipe 51 and a first drive pump 52. The first drive pump 52 and the fourth heat exchanger 132 can be connected sequentially through the third pipe 51. The third pipe 51 is used to supply the flow of the third heat exchange medium. When the high-temperature and high-pressure first heat exchange medium flows through the fourth heat exchanger 132, it transfers heat to the third heat exchange medium, and the heated third heat exchange medium then flows through the third pipe 51. The third heat exchange medium can exchange heat with the interior air through the third pipe 51, that is, the third heat exchange medium can exchange heat with the air inside the vehicle through the third pipe 51. The third pipe 51 can be installed in the vehicle floor or other locations to provide heating for the vehicle interior in the form of underfloor heating. When the third heat exchange medium flows through the third pipe 51, heat is exchanged with the air inside the vehicle through the third pipe 51, thereby achieving vehicle interior heating. After the third heat exchange medium releases heat and its temperature decreases, it returns to the inlet end of the first drive pump 52 and is pumped back into the fourth heat exchanger 132 for heating, forming a closed loop.

[0047] Alternatively, the third circulation loop 5 may include a third pipe 51, a first drive pump 52, and a fifth heat exchanger 53. The first drive pump 52, the fourth heat exchanger 132, and the fifth heat exchanger 53 can be connected sequentially through the third pipe 51. The third pipe 51 is used to supply the flow of the third heat exchange medium. The fifth heat exchanger 53 is used for heat exchange with the air inside the vehicle. When the high-temperature, high-pressure first heat exchange medium flows through the fourth heat exchanger 132, it transfers heat to the third heat exchange medium. The heated third heat exchange medium then flows through the fifth heat exchanger 53. The fifth heat exchanger 53 is a heater core and can be installed in the air conditioning duct inside the RV for heat exchange with the interior air, i.e., for heat exchange with the air inside the vehicle. When the third heat exchange medium flows through the fifth heat exchanger 53, heat is transferred to the flowing air through the fins, thereby achieving heating inside the vehicle. After releasing heat, the temperature of the third heat exchange medium decreases, and it returns to the inlet of the first drive pump 52, where it is pumped back into the fourth heat exchanger 132 for heating, forming a closed loop. In the following description of this application, the third circulation loop 5, which includes a third pipeline 51, a first drive pump 52, and a fifth heat exchanger 53, will be used as an example for illustration.

[0048] The fourth heat exchanger 132 can be a plate heat exchanger or a shell-and-tube heat exchanger, etc., to achieve direct or indirect heat exchange between the first heat exchange medium and the third heat exchange medium. In this embodiment, the fourth heat exchanger 132 is a plate heat exchanger, which has the characteristics of compact structure and high heat exchange efficiency, and is particularly suitable for installation in the limited space of a motorhome. The fourth heat exchanger 132 has mutually isolated first heat exchange medium flow channels and third heat exchange medium flow channels. When the first heat exchange medium flows through the first heat exchange medium flow channel, it transfers heat to the third heat exchange medium in the third heat exchange medium flow channel, thereby heating the third heat exchange medium. The fourth heat exchanger 132 may have a third liquid inlet 1321 and a third liquid outlet 1322 connected to the first heat exchange medium flow channel, and both the third liquid inlet 1321 and the third liquid outlet 1322 are connected to the first pipeline 11. The fourth heat exchanger 132 may also have a fourth inlet 1323 and a fourth outlet 1324 that are connected to the flow channel of the third heat exchange medium. Both the fourth inlet 1323 and the fourth outlet 1324 are connected to the third pipeline 51. To enhance the heat exchange effect, the flow direction of the third heat exchange medium in the fourth heat exchanger 132 is opposite to the flow direction of the first heat exchange medium in the fourth heat exchanger 132, i.e., a counter-current arrangement is adopted.

[0049] The third circulation loop 5 may also include a third heat exchange medium storage unit 54, which is, for example, an expansion tank, for containing the third heat exchange medium whose volume changes due to temperature changes, and can also be used for venting and replenishing liquid.

[0050] In some embodiments, refer to Figure 1The water-side heat exchange unit 13 can be located downstream of the outlet of the compressor 12, that is, the third heat exchanger 131 and the fourth heat exchanger 132 can be connected in parallel downstream of the outlet of the compressor 12.

[0051] The valve assembly 3 may further include a fifth control valve 32 and a sixth control valve 33, which are connected in parallel. Both the fifth control valve 32 and the sixth control valve 33 can be solenoid valves, etc., and their opening and closing can be controlled by the control unit 4. The fifth control valve 32 is located between the outlet end of the compressor 12 and the first liquid inlet 1311 of the third heat exchanger 131. The sixth control valve 33 may be located between the outlet end of the compressor 12 and the third liquid inlet 1321 of the fourth heat exchanger 132. By controlling the opening and closing of the fifth control valve 32 and the sixth control valve 33, the high-temperature, high-pressure first heat exchange medium can be selectively directed to the third heat exchanger 131 (for heating the second heat exchange medium) or the fourth heat exchanger 132 (for heating the third heat exchange medium), or simultaneously directed to both (simultaneously providing hot water and vehicle interior heating).

[0052] Valve assembly 3 may also include a seventh control valve 34, which may be a solenoid valve or similar device, and can be controlled to open and close by control unit 4. The seventh control valve 34 may be located on one side of the first outlet 1312 of the third heat exchanger 131. When hot water is not required, both the seventh control valve 34 and the fifth control valve 32 may be closed, thereby preventing the first heat exchange medium from entering the third heat exchanger 131.

[0053] In some embodiments, refer to Figure 1 The second circulation loop 2 may further include at least one hot water storage unit 22 and a second drive pump 23. The hot water storage unit 22 can be connected to the water-side heat exchange unit 13 via a second pipeline 21. The second drive pump 23 drives the second heat exchange medium to be heated to flow sequentially through the third heat exchanger 131 of the water-side heat exchange unit 13 and the hot water storage unit 22, where the second heat exchange medium is heated. The hot water storage unit 22 can be an insulated water tank for storing the heated second heat exchange medium; that is, the hot water storage unit 22 is used to store hot water for supply when needed.

[0054] The valve assembly 3 may include an eighth control valve 35, which may be a check valve or the like. The eighth control valve 35 may be located at the outlet end of the second drive pump 23 and is used to control the start and stop of water circulation.

[0055] The second circulation loop 2 may further include a first electric heating unit 24, which is used to heat the second heat exchange medium in the second circulation loop 2. The first electric heating unit 24 can be installed in the second circulation loop 2, for example, inside the hot water storage unit 22 or on the second pipeline 21. The first electric heating unit 24 can provide auxiliary heating or insulation for the second heat exchange medium when the heat pump heating capacity is insufficient or under specific operating conditions (such as low-temperature start-up or rapid hot water demand), thereby improving the reliability and stability of the hot water supply. The first electric heating unit 24 can be an immersion electric heating rod or a PTC (Positive Temperature Coefficient) electric heater, etc., and its power can be selected according to the water tank capacity and the expected heating rate, such as 500W to 1500W.

[0056] In some embodiments, refer to Figure 1 The hot water storage unit 22 may have a fifth liquid inlet 221. The fifth liquid inlet 221 may be connected to the outlet end of the water-side heat exchange unit 13, so that the heated second heat exchange medium flowing out from the third heat exchanger 131 can enter the hot water storage unit 22.

[0057] The hot water storage unit 22 may also have a fifth outlet 222. The fifth outlet 222 can be connected to the user end (such as a shower head or sink faucet in a motorhome). The heated second heat exchange medium in the hot water storage unit 22 can be delivered to the user end through the fifth outlet 222. The third heat exchanger 131 can heat the second heat exchange medium in one go, that is, the second heat exchange medium is heated to the set temperature in one heat exchange through the third heat exchanger 131 and then stored in the hot water storage unit 22.

[0058] The hot water storage unit 22 may also have a sixth outlet 223. The sixth outlet 223 may be connected to the inlet end of the water-side heat exchange unit 13. The second heat exchange medium in the hot water storage unit 22 may be transported to the inlet end of the water-side heat exchange unit 13 through the sixth outlet 223, so that water circulates between the hot water storage unit 22 and the water-side heat exchange unit 13. As an example, the sixth outlet 223 is connected to the second inlet 1313 of the third heat exchanger 131 through a second pipeline 21, and a second drive pump 23 is provided between the sixth outlet 223 and the second inlet 1313 of the third heat exchanger 131. The second drive pump 23 is used to drive the second heat exchange medium in the hot water storage unit 22 and the second heat exchange medium in the third heat exchanger 131 to circulate. That is, the second heat exchange medium flows out from the sixth outlet 223 of the hot water storage unit 22, is pressurized by the second drive pump 23, flows to the third heat exchanger 131, is reheated in the third heat exchanger 131, and then flows out from the second outlet 1314 of the third heat exchanger 131 and returns to the hot water storage unit 22 through the fifth inlet 221, forming a closed loop. This circulating heating method can gradually increase the temperature of the second heat exchange medium in the hot water storage unit 22 to continuously heat or keep the second heat exchange medium in the hot water storage unit 22, thereby achieving uniform water temperature in the hot water storage unit 22 and maintaining it at the set temperature.

[0059] As an example, the fifth inlet 221 can be located near the middle of the hot water storage unit 22 in the height direction, the fifth outlet 222 can be located near the upper part of the hot water storage unit 22 in the height direction, and the sixth outlet 223 can be located near the lower part of the hot water storage unit 22 in the height direction. When the second drive pump 23 starts, it extracts the second heat exchange medium with a low temperature at the bottom of the hot water storage unit 22 and sends it to the third heat exchanger 131 for heat exchange and temperature increase, so as to achieve uniform temperature circulation of the second heat exchange medium in the hot water storage unit 22 and avoid excessive temperature stratification between the upper and lower parts of the hot water storage unit 22.

[0060] In some embodiments, refer to Figure 1 The second circulation loop 2 may further include at least one cold water storage unit 25 and a third drive pump 26. The cold water storage unit 25 can be connected to the water-side heat exchange unit 13 via a second pipeline 21, that is, the cold water storage unit 25 can be connected to the second inlet 1313 of the third heat exchanger 131 via the second pipeline 21. The third drive pump 26 can be disposed between the cold water storage unit 25 and the second inlet 1313 of the third heat exchanger 131. The third drive pump 26 is used to drive the second heat exchange medium to be heated in the cold water storage unit 25 to the third heat exchanger 131 of the water-side heat exchange unit 13. The cold water storage unit 25 can be a cold water tank for storing the unheated second heat exchange medium, that is, the cold water storage unit 25 is used to store cold water.

[0061] The valve assembly 3 may include a ninth control valve 36, which may be a check valve or the like. The ninth control valve 36 may be located at the outlet of the third drive pump 26 and is used to control the start and stop of the replenishment of the unheated second heat exchange medium. By setting up the cold water storage unit 25 and the third drive pump 26, a one-time heating method can be achieved. That is, the second heat exchange medium flows through the third heat exchanger 131 once, is heated to the set temperature, and then stored in the hot water storage unit 22, or is directly supplied to the user after passing through the third heat exchanger 131, without undergoing recirculation heating.

[0062] Valve assembly 3 may further include a tenth control valve 37, which may be a three-way valve, etc. The tenth control valve 37 may have two inlet ends and one outlet end. The two inlet ends of the tenth control valve 37 may be connected to the fifth outlet 222 and the outlet end of the third drive pump 26, respectively. The outlet end of the tenth control valve 37 may be connected to or serve as the user end. The heated second heat exchange medium in the hot water storage unit 22 and the unheated second heat exchange medium in the cold water storage unit 25 can flow to the user end through the tenth control valve 37.

[0063] In some embodiments, refer to Figure 1 The heat pump system may also include a second electric heating unit 6, which is used for heat exchange with the air inside the vehicle. The second electric heating unit 6 may be a PTC (Positive Temperature Coefficient) electric heater, etc., and may be installed in the vehicle's air conditioning duct, near the fifth heat exchanger 53 and / or the second heat exchanger 16. When the ambient temperature is extremely low, resulting in insufficient heating capacity of the heat pump, or when continuous heating to the vehicle is required during heat pump defrosting, the control unit 4 may activate the second electric heating unit 6 as a supplementary or temporary heat source, thereby improving the comfort of heating inside the vehicle.

[0064] In some embodiments, the heat pump system can be powered by DC. For example, the compressor 12, each drive pump, each control valve, control unit 4, each sensor, and each fan are all designed for DC input, with rated voltages of 12V, 24V, or 48V, commonly used in RVs. The heat pump system connects to the RV's DC battery system via a DC power interface, eliminating the need for an inverter. When the RV is connected to an external AC power source, the AC power can be converted to DC to charge the battery and simultaneously power the heat pump system using the RV's built-in charger. This direct DC drive method avoids the inverter stage required by traditional AC air conditioners, reducing energy conversion losses and thus improving the overall energy efficiency of the heat pump system, thereby extending the battery-powered runtime. In other embodiments, the heat pump system can also be powered by AC.

[0065] In some embodiments, refer to Figure 1The heat pump system may also include a detection component 7, which can communicate with the control unit 4. The detection component 7 may include multiple temperature sensors, such as thermistors or thermocouples. As an example, multiple temperature sensors may be respectively arranged at the inlet and outlet of the compressor 12, the inlet and outlet of the first heat exchanger 14, the inlet and outlet of the second heat exchanger 16, the first outlet 1312, the second inlet 1313 and the second outlet 1314 of the third heat exchanger 131, the third outlet 1322 of the fourth heat exchanger 132, the inlet and outlet of the fifth heat exchanger 53, the inlet of the gas-liquid separator 17, the inlet or outlet of the intermediate heat exchanger 18, and the fifth inlet 221, the fifth outlet 222 and the sixth outlet 223 of the hot water storage unit 22.

[0066] As an example, different operating modes of the heat pump system in this application embodiment are described.

[0067] Cooling mode: Reference Figure 2 In this mode, control unit 4 controls valve island 311 to open the first control valve 311 and the fourth control valve 314, and controls valve island 312 and the third control valve 313 to close. Simultaneously, control unit 4 controls valve island 31 to open the sixth control valve 33 and controls valve island 32 and the seventh control valve 34 to close, thus preventing the third heat exchanger 131 of the water-side heat exchange unit 13 from operating. Compressor 12 starts and compresses the first heat exchange medium. The high-temperature, high-pressure first heat exchange medium discharged from compressor 12 enters the fourth heat exchanger 132 of the water-side heat exchange unit 13 through the first pipeline 11. Because the fifth control valve 32 is closed, the first heat exchange medium does not enter the third heat exchanger 131. With the first control valve 311 open and the second control valve 312 closed, the first heat exchange medium enters the first heat exchanger 14 (which acts as a condenser at this time), dissipating heat to the external environment and becoming a medium-temperature, high-pressure liquid or supercritical first heat exchange medium. The first heat exchange medium then flows through the throttling device 15 for pressure reduction, becoming a low-temperature, low-pressure gas-liquid mixture. This first heat exchange medium then enters the second heat exchanger 16 (which acts as an evaporator), absorbing heat from the vehicle's interior air to achieve cooling. Finally, the first heat exchange medium returns to the compressor 12 inlet via the fourth control valve 314 and the gas-liquid separator 17, completing one refrigeration cycle. In this mode, the hot water function is not operational.

[0068] In another embodiment, reference is made to Figure 3 In cooling mode, the first drive pump 52 is turned on, and the third heat exchange medium participates in the circulation, which can achieve the dehumidification function.

[0069] Combined cooling and hot water mode: Reference Figure 4In this mode, the control unit 4 controls the opening of the first control valve 311 and the fourth control valve 314 of the control valve island 31, and controls the closing of the second control valve 312 and the third control valve 313. Simultaneously, the control unit 4 controls the opening of the fifth control valve 32, the sixth control valve 33, and the seventh control valve 34, allowing some of the high-temperature, high-pressure first heat exchange medium to enter the third heat exchanger 131, and some of the high-temperature, high-pressure first heat exchange medium to enter the fourth heat exchanger 132. The high-temperature, high-pressure first heat exchange medium discharged from the compressor 12 is divided into two paths: one path enters the third heat exchanger 131 through the fifth control valve 32, where it exchanges heat with the second heat exchange medium circulating from the cold water storage unit 25 or the hot water storage unit 22 to heat domestic water and achieve the hot water function; the other path flows sequentially through the fourth heat exchanger 132, the first control valve 311, the first heat exchanger 14, the throttling device 15, the second heat exchanger 16, the fourth control valve 314, and the gas-liquid separator 17, and returns to the inlet of the compressor 12, completing the refrigeration cycle. By controlling the opening degrees of the fifth control valve 32 and the sixth control valve 33, the flow rate of the first heat exchange medium distributed to the hot water side and the cooling side can be adjusted, thereby achieving a balanced regulation of hot water heating and cooling capacity. This mode can simultaneously meet the needs of vehicle cooling and domestic hot water.

[0070] Hot water mode: Reference Figure 5 In this mode, control unit 4 controls valve island 31 to open the second control valve 312 and the third control valve 313, and controls valve island 31 to close the first control valve 311 and the fourth control valve 314. Simultaneously, control unit 4 controls valve island 31 to open the fifth control valve 32 and the seventh control valve 34, and controls valve island 33 to close the sixth control valve, allowing all the high-temperature, high-pressure first heat exchange medium to enter the third heat exchanger 131. Second drive pump 23 starts, driving the second heat exchange medium to circulate between the third heat exchanger 131 and the hot water storage unit 22; alternatively, third drive pump 26 starts, driving unheated second heat exchange medium from the cold water storage unit 25 to the third heat exchanger 131. The first heat exchange medium transfers heat to the second heat exchange medium in the third heat exchanger 131, and the heated second heat exchange medium flows into the hot water storage unit 22 for storage. By controlling the opening and closing of second drive pump 23 and third drive pump 26, heating can be performed using either unheated second heat exchange medium from the cold water storage unit 25 or circulating second heat exchange medium from the hot water storage unit 22. This mode can provide hot water for domestic use independently, without cooling or heating the vehicle interior.

[0071] Heating mode: Reference Figure 6In this mode, control unit 4 controls valve island 31 to open the second control valve 312 and the third control valve 313, and controls valve island 311 and the fourth control valve 314 to close. Simultaneously, control unit 4 controls valve island 31 to open the sixth control valve 33 and controls valve island 32 and the seventh control valve 34 to close. Compressor 12 starts, and the high-temperature, high-pressure first heat exchange medium discharged from compressor 12 enters the fourth heat exchanger 132 of the water-side heat exchange unit 13 through the first pipeline 11. Because the fifth control valve 32 and the seventh control valve 34 are closed, the first heat exchange medium does not enter the third heat exchanger 131. First drive pump 52 starts, driving the flow of the third heat exchange medium. In the fourth heat exchanger 132, the first heat exchange medium transfers heat to the third heat exchange medium. First drive pump 52 drives the third heat exchange medium to circulate between the fourth heat exchanger 132 and the fifth heat exchanger 53. The heated third heat exchange medium enters the fifth heat exchanger 53, releasing heat to the interior air, thus achieving interior heating. After releasing heat in the fourth heat exchanger 132, the first heat exchange medium flows through the second control valve 312 to the second heat exchanger 16 (which acts as a condenser at this time), dissipating heat to the external environment. Subsequently, the first heat exchange medium flows through the throttling device 15 for pressure reduction, becoming a low-temperature, low-pressure gas-liquid mixture. Then, the first heat exchange medium passes through the intermediate heat exchanger 18 into the first heat exchanger 14 (which acts as an evaporator at this time), absorbing heat from the outside air. Finally, the first heat exchange medium returns to the inlet of the compressor 12 through the third control valve 313 and the gas-liquid separator 17, completing one heating cycle. In this mode, the hot water function is not activated.

[0072] In another embodiment, reference is made to Figure 7 In heating mode, the first drive pump 52 is turned off, and the third heat exchange medium does not participate in the circulation.

[0073] Heating and hot water combined mode: Reference Figure 8 In this mode, control unit 4 controls the opening of the second control valve 312 and the third control valve 313 of valve island 31, and controls the closing of the first control valve 311 and the fourth control valve 314. Simultaneously, control unit 4 controls the opening of the fifth control valve 32, the sixth control valve 33, and the seventh control valve 34. The high-temperature, high-pressure first heat exchange medium discharged from compressor 12 is divided into two paths: one path enters the third heat exchanger 131 through the fifth control valve 32 to heat domestic water, achieving hot water function; the other path enters the fourth heat exchanger 132 through the sixth control valve 33 to heat the third heat exchange medium, achieving in-vehicle heating function. By controlling the opening of the fifth control valve 32 and the sixth control valve 33, the flow rate of the first heat exchange medium distributed to the hot water side and the heating side can be adjusted to achieve a balance between hot water heating and heating capacity. This mode can simultaneously meet the needs of in-vehicle heating and domestic hot water.

[0074] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0077] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A heat pump system for mobile spaces, characterized in that, include: The first circulation loop includes a first pipeline and a compressor and a water-side heat exchange unit connected through the first pipeline, wherein the first pipeline is used to supply the flow of a first heat exchange medium. The second circulation loop includes a second pipeline for supplying the flow of the second heat exchange medium. The second pipeline is connected to the water-side heat exchange unit, which is used for heat exchange between the first heat exchange medium and the second heat exchange medium. Valve assembly; The control unit is used to control the valve assembly so that the heat pump system operates in different operating modes, including cooling mode, heating mode, hot water mode, combined cooling and hot water mode, and combined heating and hot water mode.

2. The heat pump system for mobile space according to claim 1, characterized in that, The first circulation loop further includes a first heat exchanger, a throttling device, and a second heat exchanger. The first heat exchanger is used to exchange heat with the outside air, and the second heat exchanger is used to exchange heat with the inside air. The valve assembly includes a valve island, which is disposed in the first pipeline, and the valve island includes multiple control valves. Specifically, the control unit controls the opening of a portion of the control valves on the valve island, causing the first heat exchange medium at the compressor outlet to flow sequentially through the first heat exchanger, the throttling device, and the second heat exchanger, thereby achieving cooling and / or hot water functions; or... The control unit controls the opening of another part of the control valves on the valve island, so that the first heat exchange medium at the compressor outlet flows sequentially through the second heat exchanger, the throttling device and the first heat exchanger to achieve the heating function and / or hot water function.

3. The heat pump system for mobile space according to claim 2, characterized in that, The valve island includes a first control valve, a second control valve, a third control valve, and a fourth control valve; The control unit controls the opening of the first control valve and the fourth control valve, and controls the closing of the second control valve and the third control valve, so that the first heat exchange medium at the compressor outlet flows sequentially through the first heat exchanger, the throttling device and the second heat exchanger to achieve the cooling function and / or hot water function. The control unit controls the opening of the second and third control valves and the closing of the first and fourth control valves, so that the first heat exchange medium at the compressor outlet flows sequentially through the second heat exchanger, the throttling device and the first heat exchanger to achieve the heating function and / or hot water function.

4. The heat pump system for mobile space according to claim 1, characterized in that, The water-side heat exchange unit includes a third heat exchanger, which is connected to the first pipeline and the second pipeline respectively. The third heat exchanger is used to allow the first heat exchange medium and the second heat exchange medium to exchange heat.

5. The heat pump system for mobile space according to claim 4, characterized in that, The water-side heat exchange unit also includes a fourth heat exchanger, which is used to allow the first heat exchange medium and the third heat exchange medium to exchange heat. The heat pump system further includes a third circulation loop, which comprises a third pipeline and a first drive pump. The first drive pump and the fourth heat exchanger are sequentially connected through the third pipeline. The third pipeline is used to supply the flow of the third heat exchange medium, which exchanges heat with the internal air through the third pipeline; or... The heat pump system further includes a third circulation loop, which includes a third pipeline, a first drive pump, and a fifth heat exchanger. The first drive pump, the fourth heat exchanger, and the fifth heat exchanger are connected sequentially through the third pipeline. The third pipeline is used to supply the flow of the third heat exchange medium, and the fifth heat exchanger is used to exchange heat with the internal air.

6. The heat pump system for mobile space according to claim 5, characterized in that, The water-side heat exchange unit is located downstream of the compressor, and the third heat exchanger and the fourth heat exchanger are connected in parallel. The valve assembly further includes a fifth control valve and a sixth control valve. The fifth control valve is located between the outlet end of the compressor and the first liquid inlet of the third heat exchanger, and the sixth control valve is located between the outlet end of the compressor and the third liquid inlet of the fourth heat exchanger; and / or, The valve assembly further includes a seventh control valve, which is located on one side of the first liquid outlet of the third heat exchanger.

7. The heat pump system for mobile space according to claim 1, characterized in that, The second circulation loop also includes at least one hot water storage unit and a second drive pump. The hot water storage unit is connected to the water-side heat exchange unit through the second pipeline. The second drive pump is used to drive the second heat exchange medium to be heated to flow sequentially through the water-side heat exchange unit and the hot water storage unit. The valve assembly includes an eighth control valve, which is located at the outlet end of the second drive pump; and / or, The second circulation loop further includes a first electric heating unit, which is used to heat the second heat exchange medium in the second circulation loop.

8. The heat pump system for mobile space according to claim 7, characterized in that, The hot water storage unit has a fifth liquid inlet, which is connected to the outlet of the water-side heat exchange unit. The hot water storage unit also has a fifth outlet, through which hot water within the storage unit is delivered to the user; and / or, The hot water storage unit also has a sixth liquid outlet, which is connected to the inlet of the water-side heat exchange unit. The second heat exchange medium in the hot water storage unit is transported to the inlet of the water-side heat exchange unit through the sixth liquid outlet, so that the second heat exchange medium circulates between the hot water storage unit and the water-side heat exchange unit.

9. The heat pump system for mobile space according to claim 1, characterized in that, The second circulation loop also includes at least one cold water storage unit and a third drive pump. The cold water storage unit is connected to the water-side heat exchange unit through the second pipeline. The third drive pump is used to drive the second heat exchange medium to be heated in the cold water storage unit to the water-side heat exchange unit. The valve assembly includes a ninth control valve, which is located at the outlet end of the third drive pump.

10. The heat pump system for mobile space according to claim 1, characterized in that, The heat pump system also includes a second electric heating unit, which is used for heat exchange with the internal air.

11. The heat pump system for mobile space according to claim 1, characterized in that, The heat pump system is powered by DC or AC; and / or, The first heat exchange medium is carbon dioxide refrigerant.

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