Heat pump systems, vehicles and air conditioning

Abstract

The present application provides a heat pump system, a vehicle, and an air conditioner. The heat pump system includes a compressor, an indoor heat exchanger, an outdoor heat exchanger, and a first common rail flow line. The inlet of each heat exchanger is selectively connected to the outlet of the compressor or to the outlet throttling connection of the first common rail flow line, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or to the inlet of the first common rail flow line. In the above system, whether in cooling mode or heating mode, the refrigerant output from the outlet of the compressor will enter from the inlet of some heat exchangers, and after passing through the first common rail flow line, it will flow into another part of the heat exchanger and return to the compressor through the outlet of the other part of the heat exchanger, thus completing the entire refrigerant cycle. Therefore, compared with the existing heat pump system, when the operating mode is switched, the flow direction of the refrigerant in the heat exchanger will not change, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

Description

Technical Field

[0001] The present application relates to the field of heat pump technology, and in particular to a heat pump system, a vehicle, and an air conditioner. Background Art

[0002] At present, the conventional heat pump system structure is usually as follows Figure 1 As shown in the figure, the compressor is connected to the outdoor heat exchanger and the indoor heat exchanger through a four-way valve. Figure 2 As shown: The high-temperature, high-pressure refrigerant first passes through the outdoor heat exchanger, which acts as a condenser and releases heat. The medium-temperature, high-pressure refrigerant flowing out of the outdoor heat exchanger is throttled to a low-temperature, low-pressure refrigerant and then fed into the indoor heat exchanger, which acts as an evaporator and absorbs heat from the outside world, achieving cooling.

[0003] When operating in heating mode, see Figure 3 As shown: The high-temperature, high-pressure refrigerant first passes through the indoor heat exchanger, which acts as a condenser, releasing heat to achieve heating. The medium-temperature, high-pressure refrigerant flowing out of the indoor heat exchanger is throttled to a low-temperature, low-pressure refrigerant and then fed into the outdoor heat exchanger. The outdoor heat exchanger acts as an evaporator, absorbing heat from the outside world before returning it to the compressor.

[0004] See also Figure 2 and Figure 3 It can be clearly seen that in current conventional heat pump systems, when the operating mode is switched, the flow direction of the refrigerant in the heat exchanger will change, which leads to higher requirements for the heat exchanger design of the heat pump system and higher costs of the heat pump system. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a heat pump system to reduce the design requirements for the heat exchanger in the heat pump system and reduce costs.

[0006] An embodiment of the present application provides a heat pump system, including a compressor, an indoor heat exchanger, an outdoor heat exchanger and a first common rail flow pipeline, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or to the outlet throttling connection of the first common rail flow pipeline, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or to the inlet of the first common rail flow pipeline; in cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is connected to the inlet throttling connection of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; in heating mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is connected to the inlet throttling connection of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

[0007] In the above system, whether in cooling or heating mode, the refrigerant output from the compressor outlet enters the inlet of one heat exchanger, passes through the first common rail flow line, flows into another heat exchanger, and returns to the compressor through the outlet of the other heat exchanger, completing the entire refrigerant cycle. In other words, for any heat exchanger, its inlet and outlet do not change due to switching the heat pump system's operating mode (the inlet is always the inlet, and the outlet is always the outlet). Therefore, compared to existing heat pump systems, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0008] Furthermore, the number of the indoor heat exchanger is one, and the number of the outdoor heat exchangers is multiple.

[0009] In the above system, by setting up multiple outdoor heat exchangers, more diverse and flexible mode control can be achieved, such as heating and defrosting. Compared with existing heat pump systems, existing heat pump systems must be shut down and reversed during defrosting. The indoor heat exchanger can only be used to circulate low-temperature and low-pressure refrigerant in conjunction with the outdoor heat exchanger, which cannot guarantee the system's continuous heat output and has low energy efficiency. In the above system, it is possible to achieve partial defrosting of the outdoor heat exchanger while the indoor heat exchanger is heating, thereby ensuring that the system can continuously provide heat to the indoor space.

[0010] Furthermore, the number of the indoor heat exchangers is multiple, and the number of the outdoor heat exchanger is one.

[0011] In the above system, by setting up multiple outdoor heat exchangers, richer and more flexible mode control can be achieved. For example, a part of the indoor heat exchangers can be used for heating and another part of the indoor heat exchangers can be used for cooling, thereby achieving indoor dehumidification and effectively maintaining the temperature and humidity in the target space.

[0012] Furthermore, there are multiple indoor heat exchangers and multiple outdoor heat exchangers.

[0013] In the above system, by setting up multiple outdoor heat exchangers and multiple indoor heat exchangers, compared with the above two structures, richer and more flexible mode control can be achieved, such as heating and defrosting, indoor dehumidification and other modes.

[0014] Furthermore, in the heating and defrosting mode, the outlet of the compressor is respectively connected to the inlet of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlet of part of the outdoor heat exchanger and the outlet of the indoor heat exchanger are connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the outdoor heat exchanger, and the outlet of the other part of the outdoor heat exchanger is connected to the inlet of the compressor.

[0015] In this approach, heating can be achieved with the indoor heat exchanger while partially defrosting the outdoor heat exchanger. This ensures continuous indoor heat supply while also allowing for normal defrosting of the outdoor heat exchanger. Furthermore, when switching from other modes to heating and defrosting mode, refrigerant continues to flow through the heat exchanger's inlet and outlet, eliminating the need for reversal and maintaining low design requirements for the heat exchanger.

[0016] Furthermore, in the natural defrost mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the first common rail flow pipe, the outlet of the first common rail flow pipe is connected to the inlet throttling of the unfrosted outdoor heat exchanger, and the outlet of the unfrosted outdoor heat exchanger is connected to the inlet of the compressor; and the outlet of the compressor is disconnected from the inlet of the frosted outdoor heat exchanger, and the outlet of the first common rail flow pipe is also disconnected from the inlet of the frosted outdoor heat exchanger.

[0017] In this approach, the indoor heat exchanger can generate heat while the frosted outdoor heat exchanger can be shut down for natural defrosting. This ensures continuous indoor heat supply while allowing natural defrosting to continue. Furthermore, when switching from other modes to natural defrost mode, refrigerant continues to flow through the heat exchanger's inlet and outlet, eliminating the need for reversal and maintaining low design requirements for the heat exchanger.

[0018] Furthermore, in the dehumidification mode, the outlet of the compressor is connected to the inlet of part of the indoor heat exchanger, the outlet of part of the indoor heat exchanger is connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the indoor heat exchanger, and the outlet of the other part of the indoor heat exchanger is connected to the inlet of the compressor.

[0019] In this approach, heating can be achieved through some indoor heat exchangers, while cooling can be achieved through others, thereby condensing and discharging indoor water vapor to achieve heating and dehumidification. Furthermore, when switching from other modes to dehumidification mode, the refrigerant still enters and exits the heat exchanger through the inlet, eliminating the need for reversal and maintaining low design requirements for the heat exchanger.

[0020] Furthermore, the dehumidification mode includes a heating and dehumidification mode. In the heating and dehumidification mode, the outlet of the first common rail flow pipeline is also connected to the inlet throttling of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

[0021] In this approach, heating can be achieved through some indoor heat exchangers, cooling through others, and refrigerant circulation through the outdoor heat exchanger in conjunction with the heating indoor heat exchanger, thereby achieving heating and dehumidification. Furthermore, when switching from other modes to heating and dehumidification mode, the refrigerant still enters and exits the heat exchanger through the inlet, eliminating the need for reversal and maintaining low design requirements for the heat exchanger.

[0022] Furthermore, the dehumidification mode includes a defrost and dehumidification mode. In the defrost and dehumidification mode, the outlet of the compressor is also connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first common rail flow pipeline, and the outlet of the first common rail flow pipeline is connected to the inlet throttling of the other part of the indoor heat exchanger.

[0023] In this approach, heating can be achieved through some indoor heat exchangers, cooling can be achieved through another portion of the indoor heat exchanger, and refrigerant circulation can be achieved through the outdoor heat exchanger in conjunction with the cooling indoor heat exchanger, thereby performing heating and defrosting, thereby achieving defrosting and dehumidification. Furthermore, when switching from other modes to defrosting and dehumidifying mode, the refrigerant still enters and exits the heat exchanger through the inlet and outlet, eliminating the need for reversal and maintaining low design requirements for the heat exchanger.

[0024] Furthermore, in the defrost and dehumidification mode, the outlet of the compressor is respectively connected to the inlet of part of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlets of part of the indoor heat exchanger and part of the outdoor heat exchanger are connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the indoor heat exchanger and another part of the outdoor heat exchanger, and the outlets of another part of the indoor heat exchanger and another part of the outdoor heat exchanger are connected to the inlet of the compressor.

[0025] In the above method, heating can be achieved through some indoor heat exchangers, while cooling can be achieved through another indoor heat exchanger. Refrigerant circulation can be achieved through some outdoor heat exchangers in conjunction with the cooling indoor heat exchanger, and heating and defrosting can be performed. Refrigerant circulation can also be achieved through some outdoor heat exchangers in conjunction with the heating indoor heat exchanger. In this way, when the outdoor heat exchanger used to achieve refrigerant circulation in conjunction with the heating indoor heat exchanger becomes frosted due to the circulation of low-temperature, low-pressure refrigerant, it can be seamlessly switched to another outdoor heat exchanger to achieve refrigerant circulation in conjunction with the heating indoor heat exchanger, and high-temperature, high-pressure refrigerant can be circulated through this frosted outdoor heat exchanger to defrost, thereby achieving non-stop defrosting and dehumidification. Furthermore, when switching from other modes to defrosting and dehumidification mode, the refrigerant still enters the heat exchanger's inlet and exits the outlet, eliminating the need for reversing, and maintaining low design requirements for the heat exchanger.

[0026] Furthermore, the heat pump system also includes a plurality of first switching devices and a plurality of throttling devices; the first switching devices, the throttling devices and the heat exchangers correspond one to one; the inlet of each first switching device is connected to the outlet of the compressor, and the outlet of each first switching device is connected to the inlet of the corresponding heat exchanger; the inlet of each throttling device is connected to the outlet of the first common rail flow pipeline, and the outlet of each throttling device is connected to the inlet of the corresponding heat exchanger.

[0027] In the above system, a throttling device can be provided at the inlet of the heat exchanger to ensure the cooling effect of the heat exchanger.

[0028] Furthermore, the heat pump system also includes a plurality of first valve assemblies, each of the first valve assemblies corresponding to the heat exchanger one by one, each of the first valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet and an outlet, the valve core being arranged in the valve body, the valve core being used to control the outlet of the valve body to selectively communicate with the first inlet or with the second inlet through a throttle hole; the first inlet of each first valve assembly is communicated with the outlet of the compressor, the second inlet of each first valve assembly is communicated with the outlet of the first common rail flow pipeline, and the outlet of each first valve assembly is communicated with the inlet of the corresponding heat exchanger.

[0029] Furthermore, the heat pump system also includes a plurality of second valve assemblies, each of the second valve assemblies corresponding to the heat exchanger one by one, each of the second valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being arranged in the valve body, the valve core being used to selectively control the first inlet of the valve body to be connected to the first outlet, or the second inlet to the second outlet to be connected through a throttle hole; the first inlet of each second valve assembly is connected to the outlet of the compressor, the second inlet of each second valve assembly is connected to the outlet of the first common rail flow pipeline, and the first outlet and the second outlet of each second valve assembly are connected to the inlet of the corresponding heat exchanger.

[0030] Furthermore, the heat pump system also includes a plurality of second switch devices and a plurality of third switch devices; the second switch devices, the third switch devices and the heat exchangers correspond one to one; the inlet of each second switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each second switch device is connected to the inlet of the first common rail flow pipeline; the inlet of each third switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each third switch device is connected to the inlet of the compressor.

[0031] Furthermore, the heat pump system also includes a second common rail flow pipeline; the outlet of the compressor is connected to the inlet of the second common rail flow pipeline; the inlet of each heat exchanger is selectively connected to the outlet of the second common rail flow pipeline or the outlet of the first common rail flow pipeline.

[0032] In the above system, the connection between all heat exchangers and the compressor outlet is achieved through the second common rail flow pipeline, which can effectively realize the output management of high-temperature and high-pressure refrigerant from the compressor outlet to each heat exchanger. Since only one pipeline is required, the system structure is simpler and the cost is lower.

[0033] Furthermore, the heat pump system further includes a high-pressure tank; the high-pressure tank is arranged on the second common rail flow pipeline.

[0034] In the above system, by installing a high-pressure tank on the second common rail flow line, the high-pressure tank can be used to control the storage of high-temperature, high-pressure refrigerant, thereby effectively regulating the pressure in the heat pump system. The high-pressure tank can even be used to continuously output high-temperature, high-pressure refrigerant when the compressor is shut down, thereby ensuring that the heat pump system can continue to operate normally during the compressor shutdown period.

[0035] Furthermore, the heat pump system further includes a high-pressure tank; the high-pressure tank is arranged on the first common rail flow pipeline.

[0036] In the above system, by installing a high-pressure tank on the first common rail flow line, the high-pressure tank can be used to control the storage of high-temperature, high-pressure refrigerant, thereby effectively regulating the pressure in the heat pump system. The high-pressure tank can even be used to continuously output high-temperature, high-pressure refrigerant when the compressor is shut down, thereby ensuring that the heat pump system can continue to operate normally during the compressor shutdown period.

[0037] Furthermore, the heat pump system also includes a third common rail flow pipeline; the outlet of each heat exchanger is selectively connected to the inlet of the third common rail flow pipeline or the inlet of the first common rail flow pipeline; the inlet of the compressor is connected to the outlet of the third common rail flow pipeline.

[0038] In the above system, the connection between all heat exchangers and the compressor inlet is achieved through the third common rail flow pipeline, which can effectively realize the output management of low-temperature and low-pressure refrigerant from each heat exchanger to the compressor inlet. Since only one pipeline is required, the system structure is simpler and the cost is lower.

[0039] Furthermore, the heat pump system further includes a low-pressure tank; the low-pressure tank is arranged on the third common rail flow pipeline.

[0040] In the above system, by arranging a low-pressure tank on the third common rail flow line, the storage control of the refrigerant in the low-temperature and low-pressure state can be achieved through the low-pressure tank, thereby achieving effective regulation of the pressure in the heat pump system.

[0041] Furthermore, the heat pump system further includes a regenerator; the regenerator is provided on the first common rail flow pipeline and the third common rail flow pipeline to achieve heat exchange between the first common rail flow pipeline and the third common rail flow pipeline.

[0042] In the above system, heat exchange is achieved between the first common rail flow line and the third common rail flow line through the regenerator. This allows the refrigerant that flows into the heat exchanger after throttling through the first common rail flow line to undergo a temperature reduction treatment in the low-temperature and low-pressure state in the regenerator and the third common rail flow line before throttling. This allows the refrigerant that flows into the heat exchanger after throttling to have a better heat absorption effect.

[0043] An embodiment of the present application also provides a heat pump system, including a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or connected to the outlet throttling of other heat exchangers, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or connected to the inlet throttling of other heat exchangers; in cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet throttling of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; in heating mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet throttling of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

[0044] In the above system, whether in cooling mode or heating mode, the refrigerant output from the compressor outlet enters through the inlet of one heat exchanger, exits through the outlet, flows into another heat exchanger, and returns to the compressor through the outlet of the other heat exchanger, completing the entire refrigerant cycle. In other words, for any heat exchanger, its inlet and outlet do not change due to switching the heat pump system's operating mode (the inlet is always the inlet, and the outlet is always the outlet). Therefore, compared to existing heat pump systems, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0045] Furthermore, the number of the indoor heat exchanger is one, and the number of the outdoor heat exchanger is multiple. In this case, the effects thereof can be referred to the description of the corresponding contents above, and will not be repeated here.

[0046] Furthermore, the number of the indoor heat exchangers is multiple, and the number of the outdoor heat exchanger is one. In this case, the effects thereof can be referred to the description of the corresponding contents above, and will not be repeated here.

[0047] Furthermore, the number of the indoor heat exchangers is multiple, and the number of the outdoor heat exchangers is multiple. In this case, the effects thereof can be referred to the description of the corresponding contents above, and will not be repeated here.

[0048] Furthermore, in heating and defrosting mode, the compressor outlet is connected to the inlet of the indoor heat exchanger and the inlet of a portion of the outdoor heat exchanger, respectively. The outlets of the portion of the outdoor heat exchanger and the outlets of the indoor heat exchanger are connected to the inlet of another portion of the outdoor heat exchanger in throttled flow mode, and the outlets of the other portion of the outdoor heat exchanger are connected to the inlet of the compressor. The effects of this operation are described above and will not be repeated here.

[0049] Furthermore, in natural defrost mode, the compressor outlet is connected to the inlet of the indoor heat exchanger, which is in throttled communication with the inlet of an unfrosted outdoor heat exchanger, which is then connected to the compressor inlet. Furthermore, the compressor outlet is disconnected from the inlet of a frosted outdoor heat exchanger, and the outlets of the indoor heat exchanger and the unfrosted outdoor heat exchanger are also disconnected from the inlet of the frosted outdoor heat exchanger. The effects of this operation are described above and will not be repeated here.

[0050] Furthermore, in dehumidification mode, the compressor outlet is connected to the inlet of some indoor heat exchangers, which are in throttled communication with the inlet of another indoor heat exchanger, which is in throttled communication with the inlet of the compressor. The effects of this operation are described above and will not be repeated here.

[0051] Furthermore, the dehumidification mode includes a heating and dehumidification mode. In this heating and dehumidification mode, the outlets of some indoor heat exchangers are connected to the inlet of the outdoor heat exchanger in a throttled manner, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor. The effects of this operation are described above and will not be repeated here.

[0052] Furthermore, the dehumidification mode includes a defrost and dehumidification mode. In this defrost and dehumidification mode, the compressor outlet is also connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the other indoor heat exchanger in a throttled manner. The effects of this operation are described above and will not be repeated here.

[0053] Furthermore, in defrost and dehumidification mode, the compressor outlet is connected to the inlets of some indoor heat exchangers and some outdoor heat exchangers, respectively. The outlets of some indoor and outdoor heat exchangers are connected to the inlets of other indoor and outdoor heat exchangers in a throttled manner, and the outlets of other indoor and outdoor heat exchangers are connected to the compressor inlet. The effects of this operation are described above and will not be repeated here.

[0054] Furthermore, the heat pump system also includes multiple first switching devices and multiple throttling devices; the first switching devices, the throttling devices and the heat exchangers correspond one to one; the inlet of each first switching device is connected to the outlet of the compressor, and the outlet of each first switching device is connected to the inlet of the corresponding heat exchanger; the outlet of each throttling device is connected to the inlet of the corresponding heat exchanger, and the inlet of each throttling device is connected to the outlet of other heat exchangers except the corresponding heat exchanger.

[0055] Furthermore, the heat pump system also includes a plurality of first valve assemblies, each of the first valve assemblies corresponding to the heat exchangers one by one, each of the first valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet and an outlet, the valve core being arranged in the valve body, the valve core being used to control the outlet of the valve body to selectively connect with the first inlet or connect with the second inlet through a throttle hole; the outlet of each first valve assembly is connected with the inlet of the corresponding heat exchanger, the first inlet of each first valve assembly is connected with the outlet of the compressor, and the second inlet of each first valve assembly is connected with the outlet of other heat exchangers except the corresponding heat exchanger.

[0056] Furthermore, the heat pump system also includes a plurality of second valve assemblies, which correspond to the heat exchangers one by one, and each of the second valve assemblies includes a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being arranged in the valve body, and the valve core being used to selectively control the first inlet of the valve body to be connected to the first outlet, or the second inlet to the second outlet to be connected through a throttle hole; the first outlet and the second outlet of each second valve assembly are connected to the inlet of the corresponding heat exchanger, the first inlet of each second valve assembly is connected to the outlet of the compressor, and the second inlet of each second valve assembly is connected to the outlet of other heat exchangers except the corresponding heat exchanger.

[0057] Furthermore, the heat pump system further includes multiple second switch devices and multiple third switch devices; the second switch devices, the third switch devices, and the heat exchangers correspond one-to-one; the inlet of each second switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each second switch device is connected to the inlet of heat exchangers other than the corresponding heat exchanger; the inlet of each third switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each third switch device is connected to the inlet of the compressor. The effects of this can be found in the description of the corresponding content above and will not be repeated here.

[0058] Furthermore, the heat pump system further includes a high-pressure tank connected between the outlet of the compressor and the inlet of the heat exchanger. The effects of this arrangement can be found in the description of the effects of the high-pressure tank above and will not be elaborated on here.

[0059] Furthermore, the heat pump system further includes a high-pressure tank connected between the outlet of each heat exchanger and the inlet of another heat exchanger. The effects of this arrangement can be found in the description of the effects of the high-pressure tank above and will not be repeated here.

[0060] Furthermore, the heat pump system further includes a low-pressure tank connected between the inlet of the compressor and the outlet of the heat exchanger. The effects of this arrangement can be found in the description of the effects of the low-pressure tank above and will not be elaborated on here.

[0061] An embodiment of the present application also provides a heat pump system, including a compressor, an indoor heat exchanger, an outdoor heat exchanger and a common rail throttling pipeline, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or the outlet of the common rail throttling pipeline, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or the inlet of the common rail throttling pipeline; in cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the common rail throttling pipeline, the outlet of the common rail throttling pipeline is connected to the inlet of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; in heating mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the common rail throttling pipeline, the outlet of the common rail throttling pipeline is connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

[0062] In the above system, whether in cooling or heating mode, the refrigerant output from the compressor outlet enters the inlet of one heat exchanger, is throttled by the common rail throttling line, flows into another heat exchanger, and returns to the compressor through the outlet of the other heat exchanger, completing the entire refrigerant cycle. In other words, for any heat exchanger, its inlet and outlet do not change due to switching the heat pump system's operating mode (the inlet is always the inlet, and the outlet is always the outlet). Therefore, compared to existing heat pump systems, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0063] Furthermore, the number of the indoor heat exchanger is one, and the number of the outdoor heat exchanger is multiple. In this case, the effects thereof can be referred to the effect description of the relevant content above, and will not be repeated here.

[0064] Furthermore, the number of the indoor heat exchangers is multiple, and the number of the outdoor heat exchanger is one. In this case, the effects thereof can be referred to the effect description of the relevant content above, and will not be repeated here.

[0065] Furthermore, the number of the indoor heat exchangers is multiple, and the number of the outdoor heat exchangers is multiple. In this case, the effects can be found in the effect description of the relevant content above, and will not be repeated here.

[0066] Furthermore, in heating and defrosting mode, the compressor outlet is connected to the inlet of the indoor heat exchanger and the inlet of a portion of the outdoor heat exchanger, respectively. The outlets of the portion of the outdoor heat exchanger and the indoor heat exchanger are connected to the inlet of the common rail throttling line. The outlet of the common rail throttling line is connected to the inlet of another portion of the outdoor heat exchanger, and the outlet of the other portion of the outdoor heat exchanger is connected to the inlet of the compressor. The effects achieved in this case can be found in the description of the effects in the relevant content above and will not be repeated here.

[0067] Furthermore, in natural defrost mode, the compressor outlet is connected to the inlet of the indoor heat exchanger, which is connected to the inlet of the common rail throttle pipe, which is connected to the inlet of the unfrosted outdoor heat exchanger, which is connected to the inlet of the compressor; the compressor outlet is disconnected from the inlet of the frosted outdoor heat exchanger, and the common rail throttle pipe outlet is also disconnected from the inlet of the frosted outdoor heat exchanger. The effects achieved in this case can be found in the description of the effects in the relevant content above and will not be repeated here.

[0068] Furthermore, in dehumidification mode, the compressor outlet is connected to the inlet of some indoor heat exchangers, which in turn are connected to the inlet of the common rail throttle pipe, which in turn are connected to the inlet of another indoor heat exchanger, which in turn are connected to the inlet of the compressor. The effects achieved in this case can be found in the description of the effects described above and will not be repeated here.

[0069] Furthermore, the dehumidification mode includes a heating and dehumidification mode. In this heating and dehumidification mode, the outlet of the common rail throttling pipe is also connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor. The effects of this operation can be found in the description of the effects in the relevant content above and will not be repeated here.

[0070] Furthermore, the dehumidification mode includes a defrost and dehumidification mode. In this defrost and dehumidification mode, the compressor outlet is also connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the common rail throttle pipe, and the outlet of the common rail throttle pipe is connected to the inlet of the other indoor heat exchanger. The effects of this operation can be found in the description of the effects in the relevant content above and will not be repeated here.

[0071] Furthermore, in defrost and dehumidification mode, the compressor outlet is connected to the inlets of some indoor heat exchangers and some outdoor heat exchangers, respectively. The outlets of some indoor and outdoor heat exchangers are connected to the inlet of the common rail throttle pipe, which is connected to the inlets of another portion of indoor and outdoor heat exchangers. The outlets of the other portion of indoor and outdoor heat exchangers are connected to the inlet of the compressor. The effects achieved in this case can be found in the description of the effects in the relevant content above and will not be repeated here.

[0072] Furthermore, the heat pump system also includes a plurality of second switch devices and a plurality of third switch devices; the second switch devices, the third switch devices and the heat exchangers correspond one to one; the inlet of each second switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each second switch device is connected to the inlet of the common rail throttling line; the inlet of each third switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each third switch device is connected to the inlet of the compressor.

[0073] Furthermore, the heat pump system further includes a plurality of fourth switch devices and a plurality of fifth switch devices, each of the fourth switch devices, the fifth switch devices, and the heat exchangers corresponding one to one. The inlet of each fourth switch device is connected to the outlet of the compressor, and the outlet of each fourth switch device is connected to the inlet of the corresponding heat exchanger. The inlet of each fifth switch device is connected to the outlet of the common rail throttling line, and the outlet of each fifth switch device is connected to the inlet of the corresponding heat exchanger. The effects achieved in this case can be found in the description of the effects in the relevant content above and will not be repeated here.

[0074] Furthermore, the heat pump system also includes a plurality of fifth valve assemblies, each of the fifth valve assemblies corresponding to the heat exchanger one by one, each of the fifth valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet and an outlet, the valve core being arranged in the valve body, and the valve core being used to control the outlet of the valve body to selectively communicate with the first inlet or with the second inlet; the first inlet of each of the fifth valve assemblies is communicated with the outlet of the compressor, the second inlet of each of the fifth valve assemblies is communicated with the outlet of the common rail throttling line, and the outlet of each of the fifth valve assemblies is communicated with the inlet of the corresponding heat exchanger.

[0075] Furthermore, the heat pump system also includes a plurality of sixth valve assemblies, the sixth valve assemblies corresponding to the heat exchangers one-to-one, each of the sixth valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being arranged in the valve body, the valve core being used to selectively control the first inlet of the valve body to be connected to the first outlet, or the second inlet to the second outlet; the first inlet of each of the sixth valve assemblies is connected to the outlet of the compressor, the second inlet of each of the sixth valve assemblies is connected to the outlet of the common rail throttling line, and the first outlet and the second outlet of each of the sixth valve assemblies are connected to the inlet of the corresponding heat exchanger.

[0076] Furthermore, the heat pump system further includes a second common rail flow line; the compressor outlet is connected to the inlet of the second common rail flow line; and the inlet of each heat exchanger is selectively connected to the outlet of the second common rail flow line or the outlet of the common rail throttling line. The effects of this arrangement are described above and are not further elaborated here.

[0077] Furthermore, the heat pump system further comprises a high-pressure tank; the high-pressure tank is arranged on the second common rail flow line. In this case, the effects thereof can be referred to the description of the corresponding content above and will not be repeated here.

[0078] Furthermore, the heat pump system further comprises a high-pressure tank; the high-pressure tank is arranged on the common rail throttle pipe. In this case, the effects thereof can be referred to the description of the corresponding content above and will not be repeated here.

[0079] Furthermore, the heat pump system also includes a third common rail flow line; the outlet of each heat exchanger selectively communicates with the inlet of the third common rail flow line or the inlet of the first common rail flow line; and the inlet of the compressor communicates with the outlet of the third common rail flow line. The effects of this arrangement are described above and are not further elaborated here.

[0080] Furthermore, the heat pump system further comprises a low-pressure tank, which is arranged on the third common rail flow line. The effects thereof can be found in the description of the corresponding contents above and will not be repeated here.

[0081] Furthermore, the heat pump system further includes a regenerator disposed on the common rail throttling line and the third common rail flow line to facilitate heat exchange between the common rail throttling line and the third common rail flow line. The effects of this regenerator are described in the previous section and are not further elaborated here.

[0082] An embodiment of the present application further provides a vehicle comprising any one of the above-mentioned heat pump systems.

[0083] Furthermore, the transportation vehicle is a vehicle.

[0084] An embodiment of the present application further provides an air conditioner, which includes any of the above-mentioned heat pump systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0086] Figure 1 Schematic diagram of the heat pump system structure in the related art;

[0087] Figure 2 A refrigerant flow diagram of a heat pump system in related art when operating in cooling mode;

[0088] Figure 3 A refrigerant flow diagram of a heat pump system in related art when operating in heating mode;

[0089] Figure 4 A schematic structural diagram of a heat pump system having an indoor heat exchanger and an outdoor heat exchanger and provided with a first valve assembly according to an embodiment of the present application;

[0090] Figure 5 A schematic structural diagram of a heat pump system with an indoor heat exchanger and an outdoor heat exchanger provided in an embodiment of the present application and provided with a first switch device and a throttling device;

[0091] Figure 6 A schematic structural diagram of a heat pump system having an indoor heat exchanger and an outdoor heat exchanger and provided with a second valve assembly according to an embodiment of the present application;

[0092] Figure 7 for Figure 5 Schematic diagram of refrigerant flow in the heat pump system in cooling mode;

[0093] Figure 8 for Figure 5 Schematic diagram of refrigerant flow in the heat pump system in heating mode;

[0094] Figure 9 for Figure 5 Schematic diagram of refrigerant flow in the heat pump system in defrost mode;

[0095] Figure 10A schematic structural diagram of a heat pump system having two indoor heat exchangers and one outdoor heat exchanger and provided with a first valve assembly according to an embodiment of the present application;

[0096] Figure 11 A schematic structural diagram of a heat pump system provided in an embodiment of the present application, which is provided with a first switch device and a throttling device and has two indoor heat exchangers and one outdoor heat exchanger;

[0097] Figure 12 A schematic structural diagram of a heat pump system with two indoor heat exchangers and one outdoor heat exchanger provided in an embodiment of the present application and provided with a second valve assembly;

[0098] Figure 13 for Figure 10 Schematic diagram of refrigerant flow in the heat pump system in cooling mode;

[0099] Figure 14 for Figure 10 Schematic diagram of refrigerant flow in the heat pump system in heating mode;

[0100] Figure 15 for Figure 10 Schematic diagram of refrigerant flow in the heat pump system in heating and dehumidification mode;

[0101] Figure 16 for Figure 10 Schematic diagram of refrigerant flow in the heat pump system in defrost mode;

[0102] Figure 17 for Figure 10 Schematic diagram of refrigerant flow in the heat pump system in dehumidification and defrosting mode;

[0103] Figure 18 A schematic structural diagram of a heat pump system having one indoor heat exchanger and two outdoor heat exchangers provided in an embodiment of the present application and provided with a first valve assembly;

[0104] Figure 19 A schematic structural diagram of a heat pump system provided in an embodiment of the present application, which is provided with a first switch device and a throttling device and has one indoor heat exchanger and two outdoor heat exchangers;

[0105] Figure 20 A schematic structural diagram of a heat pump system with one indoor heat exchanger and two outdoor heat exchangers provided in an embodiment of the present application and provided with a second valve assembly;

[0106] Figure 21 for Figure 18 Schematic diagram of refrigerant flow in the heat pump system in cooling mode;

[0107] Figure 22 for Figure 18Schematic diagram of refrigerant flow in the heat pump system in heating mode;

[0108] Figure 23 for Figure 18 Schematic diagram of refrigerant flow in the heat pump system in defrost mode;

[0109] Figure 24 for Figure 18 Schematic diagram of refrigerant flow in the heat pump system in natural defrost mode;

[0110] Figure 25 A schematic structural diagram of a heat pump system with two indoor heat exchangers and two outdoor heat exchangers provided in an embodiment of the present application and provided with a first valve assembly;

[0111] Figure 26 A schematic structural diagram of a heat pump system with two indoor heat exchangers and two outdoor heat exchangers provided in an embodiment of the present application and provided with a first switch device and a throttling device;

[0112] Figure 27 A schematic structural diagram of a heat pump system with two indoor heat exchangers and two outdoor heat exchangers provided in an embodiment of the present application and provided with a second valve assembly;

[0113] Figure 28 for Figure 25 Schematic diagram of refrigerant flow in the heat pump system in cooling mode;

[0114] Figure 29 for Figure 25 Schematic diagram of refrigerant flow in the heat pump system in heating mode;

[0115] Figure 30 for Figure 25 Schematic diagram of refrigerant flow in the heat pump system in dehumidification mode;

[0116] Figure 31 for Figure 25 The schematic diagram of refrigerant flow of the heat pump system in heating and defrosting mode is shown;

[0117] Figure 32 for Figure 25 Schematic diagram of refrigerant flow in the heat pump system in dehumidification and defrosting mode;

[0118] Figure 33 for Figure 10 A schematic diagram of refrigerant flow when the heat pump system is performing indoor dehumidification is shown;

[0119] Figure 34 for Figure 25 A schematic diagram of refrigerant flow when the heat pump system is performing indoor dehumidification is shown;

[0120] Figure 35 A schematic structural diagram of a heat pump system with additional components provided in an embodiment of the present application;

[0121] Figure 36 A schematic structural diagram of another heat pump system with additional components provided in an embodiment of the present application;

[0122] Figure 37 A schematic structural diagram of a heat pump system having an indoor heat exchanger and an outdoor heat exchanger provided in Example 2 of the present application;

[0123] Figure 38 A schematic structural diagram of another heat pump system having an indoor heat exchanger and an outdoor heat exchanger provided in Example 2 of the present application;

[0124] Figure 39 A schematic structural diagram of another heat pump system having an indoor heat exchanger and an outdoor heat exchanger provided in Example 2 of the present application;

[0125] Figure 40 A schematic structural diagram of a heat pump system with two indoor heat exchangers and one outdoor heat exchanger provided in Example 2 of the present application;

[0126] Figure 41 A schematic structural diagram of another heat pump system with two indoor heat exchangers and one outdoor heat exchanger provided in Example 2 of the present application;

[0127] Figure 42 A schematic structural diagram of a heat pump system having one indoor heat exchanger and two outdoor heat exchangers provided in Example 2 of the present application;

[0128] Figure 43 A schematic structural diagram of a heat pump system with two indoor heat exchangers and two outdoor heat exchangers provided in Example 2 of the present application;

[0129] Figure 44 A schematic structural diagram of a heat pump system with additional components provided in Example 2 of the present application;

[0130] Figure 45 A schematic structural diagram of a heat pump system without common rail provided in an embodiment of the present application;

[0131] Figure 46A A schematic structural diagram of a first valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0132] Figure 46B A schematic structural diagram of a first valve assembly provided in an embodiment of the present application, wherein the valve core is located in the second position;

[0133] Figure 47AA schematic structural diagram of a second valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0134] Figure 47B A schematic structural diagram of a second valve assembly provided in an embodiment of the present application, wherein the valve core is located in a second position;

[0135] Figure 48A A schematic structural diagram of a third valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0136] Figure 48B A schematic structural diagram of a third valve assembly provided in an embodiment of the present application, wherein the valve core is located in the second position;

[0137] Figure 49A A schematic structural diagram of a fourth valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0138] Figure 49B A schematic structural diagram of a fourth valve assembly provided in an embodiment of the present application, wherein the valve core is located in the second position;

[0139] Figure 50A A schematic structural diagram of a fifth valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0140] Figure 50B A schematic structural diagram of a fifth valve assembly provided in an embodiment of the present application, wherein the valve core is located in the second position;

[0141] Figure 51A A schematic structural diagram of a sixth valve assembly provided in an embodiment of the present application, wherein the valve core is located in a first position;

[0142] Figure 51B A schematic structural diagram of the sixth valve assembly provided in an embodiment of the present application, wherein the valve core is located in the second position.

[0143] Wherein: 1 - compressor; 21 - first common rail flow line; 22 - second common rail flow line; 23 - third common rail flow line; 24 - common rail throttling line; 31 - indoor heat exchanger; 32 - outdoor heat exchanger; 40 - throttling device; 41 - first switch device; 42 - second switch device; 43 - third switch device; 44 - fourth switch device; 45 - fifth switch device; 46 - first valve assembly; 461 - valve body of the first valve assembly; 4610 - orifice of the first valve assembly; 4611 - first inlet of the first valve assembly; 4612 - second inlet of the first valve assembly; 4613 - outlet of the first valve assembly; 462 - valve core of the first valve assembly; 47 - second valve assembly; 471 - valve body of the second valve assembly; 4710 - orifice of the second valve assembly; 4711 - first inlet of the second valve assembly; 4712 - second inlet of the second valve assembly; 4713 - first outlet of the second valve assembly; 4714 - second outlet of the second valve assembly; 472 - valve core of the second valve assembly; 48 - third valve assembly; 481 - valve body of the third valve assembly; 4811 - first outlet of the third valve assembly; 4812 - second outlet of the third valve assembly; 4813 - inlet of the third valve assembly; 482 - valve core of the third valve assembly; 49 - fourth valve assembly; 491 - valve body of the fourth valve assembly; 4911 - first outlet of the fourth valve assembly; 4912 - second outlet of the fourth valve assembly; 4913 - first inlet of the fourth valve assembly; 4914 - second inlet of the fourth valve assembly; 492-valve core of the fourth valve assembly; 51-indoor fan; 52-outdoor fan; 61-high-pressure tank; 62-low-pressure tank; 63-regenerator; 64-auxiliary heat exchanger; 65-pressure regulating valve; 66-constant pressure valve; 67-one-way valve; 71-fifth valve assembly; 711-valve body of the fifth valve assembly; 7111-first inlet of the fifth valve assembly; 7112-second inlet of the fifth valve assembly; 7113-outlet of the fifth valve assembly; 712-valve core of the fifth valve assembly; 72-sixth valve assembly; 721-valve body of the sixth valve assembly; 7211-first inlet of the sixth valve assembly; 7212-second inlet of the sixth valve assembly; 7213-first outlet of the sixth valve assembly; 7214-second outlet of the sixth valve assembly; 722-valve core of the sixth valve assembly. DETAILED DESCRIPTION

[0144] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings in the embodiments of the present application.

[0145] Example 1:

[0146] Please combine Figures 4 to 36 As shown, Figures 4 to 36 The heat pump system provided in this embodiment is shown, including: a compressor 1 , an indoor heat exchanger 31 , an outdoor heat exchanger 32 and a first common rail flow pipeline 21 .

[0147] The inlet of each heat exchanger is selectively connected to the outlet of the compressor 1 or the outlet throttling connection of the first common rail flow line 21 , and the outlet of each heat exchanger is selectively connected to the inlet of the compressor 1 or the inlet of the first common rail flow line 21 .

[0148] It should be understood that the heat pump system provided in the embodiment of the present application is used, see Figure 7 、 Figure 8 、 Figure 13 、 Figure 14 、 Figure 21 、 Figure 22 、 Figure 28 and Figure 29 As shown:

[0149] In cooling mode, the outlet of the compressor 1 is connected to the inlet of the outdoor heat exchanger 32, the outlet of the outdoor heat exchanger 32 is connected to the inlet of the first common rail flow pipe 21, the outlet of the first common rail flow pipe 21 is connected to the inlet throttling of the indoor heat exchanger 31, and the outlet of the indoor heat exchanger 31 is connected to the inlet of the compressor 1.

[0150] At this point, the high-temperature, high-pressure refrigerant is output from the outlet of compressor 1 to the outdoor heat exchanger 32, where it releases heat through the operation of the outdoor fan 52. After releasing heat, the medium-temperature, high-pressure refrigerant flows through the outlet of the outdoor heat exchanger 32, through the first common rail flow line 21, and, after throttling, is input into the indoor heat exchanger 31. The indoor fan 51 absorbs heat and cools the room. After absorbing heat, the low-temperature, low-pressure refrigerant is output from the outlet of the indoor heat exchanger 31 to the compressor 1, entering the next cycle.

[0151] In the heating mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31, the outlet of the indoor heat exchanger 31 is connected to the inlet of the first common rail flow pipe 21, the outlet of the first common rail flow pipe 21 is connected to the inlet throttling of the outdoor heat exchanger 32, and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1.

[0152] At this point, the high-temperature, high-pressure refrigerant is output from the outlet of compressor 1 to the indoor heat exchanger 31, where it releases heat through the operation of the indoor fan 51. After releasing heat, the medium-temperature, high-pressure refrigerant flows through the outlet of the indoor heat exchanger 31, through the first common rail flow line 21, and, after throttling, is input into the outdoor heat exchanger 32 to absorb heat. After absorbing heat, the low-temperature, low-pressure refrigerant is output from the outlet of the indoor heat exchanger 31 to the compressor 1 for the next cycle.

[0153] It should be noted that the throttling connection described in the embodiments of the present application means that the refrigerant is input into the connected heat exchanger only after throttling.

[0154] It should be noted that in the embodiments of the present application, the refrigerant can be implemented by CFCs (alkanes), HCFCs (hydrochlorofluorocarbons), HFCs (hydrofluorocarbons, such as Freon), olefins, aromatic hydrocarbons, ammonia, carbon dioxide, water, etc., and the specific type of refrigerant is not limited in the embodiments of the present application.

[0155] It should also be noted that in the embodiment of the present application, since the inlet of each heat exchanger is selectively connected to the outlet throttle of the first common rail flow line 21 or to the outlet of the compressor 1, that is, when the inlet of the heat exchanger needs to be connected to the outlets of the aforementioned two components, it can only be connected in one of these two ways. Therefore, a device with a switching function needs to be installed between the inlet of each heat exchanger and the outlet of the first common rail flow line 21, and between the inlet of each heat exchanger and the outlet of the compressor 1 to meet the communication requirements of the heat exchanger inlet.

[0156] It should be understood that in the embodiment of the present application, between the inlet of each heat exchanger and the outlet of the first common rail flow pipeline 21, and between the inlet of each heat exchanger and the outlet of the compressor 1, two independent devices with switching functions can be used to achieve the setting, but the setting can also be achieved by using an integrated valve.

[0157] Optional, see Figure 5 、 Figure 11 、 Figure 19 and Figure 26 As shown, Figure 5 、 Figure 11 、 Figure 19 and Figure 26 The heat pump system is implemented using two independent devices with switching functions. The heat pump system includes multiple first switch devices 41 and multiple throttling devices 40. Each of the first switch devices 41, throttling devices 40, and heat exchangers corresponds to each other. The inlet of each first switch device 41 communicates with the outlet of the compressor 1, and the outlet of each first switch device 41 communicates with the inlet of the corresponding heat exchanger. The inlet of each throttling device 40 communicates with the outlet of the first common rail flow line 21, and the outlet of each throttling device 40 communicates with the inlet of the corresponding heat exchanger.

[0158] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the first switch device 41 or throttling device 40 of each heat exchanger to be opened according to the requirements of the desired operating mode. When operating in cooling mode, it is only necessary to open the first switch device 41 of the outdoor heat exchanger 32 and close the throttling device 40 of the outdoor heat exchanger 32, open the throttling device 40 of the indoor heat exchanger 31, and close the first switch device 41 of the indoor heat exchanger 31; when operating in heating mode, it is only necessary to open the first switch device 41 of the indoor heat exchanger 31 and close the throttling device 40 of the indoor heat exchanger 31, open the throttling device 40 of the outdoor heat exchanger 32, and close the first switch device 41 of the outdoor heat exchanger 32.

[0159] It should be noted that in each of the drawings, the dotted lines represent unconnected pipelines.

[0160] Optional, see Figure 4 、 Figure 10 、 Figure 18 and Figure 25 As shown, Figure 4 、 Figure 10 、 Figure 18 and Figure 25 A structure implemented using an integrated valve is shown. In this case, the heat pump system can include multiple first valve assemblies 46, with each first valve assembly 46 corresponding to a heat exchanger. Each first valve assembly 46 includes a valve body and a valve core. The valve body has a first inlet, a second inlet, and an outlet. The valve core is disposed within the valve body and is used to control the outlet of the valve body to selectively connect to the first inlet or the second inlet through a throttle hole. The first inlet of each first valve assembly 46 is connected to the outlet of the compressor 1, the second inlet of each first valve assembly 46 is connected to the outlet of the first common rail flow line 21, and the outlet of each first valve assembly 46 is connected to the inlet of the corresponding heat exchanger.

[0161] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the valve core of the first valve assembly 46 of each heat exchanger to connect the corresponding inlet and outlet according to the requirements of the required operating mode.

[0162] For example, the structure of the first valve assembly 46 can be seen in Figure 46A and Figure 46B As shown, the valve body 461 is provided with a first inlet 4611, a second inlet 4612 and an outlet 4613. The valve core 462 is movably disposed in the valve body 461 and has a first position and a second position.

[0163] When the valve core 462 is in the first position, Figure 46AAs shown, the first inlet 4611 is connected to the outlet 4613 through the throttle hole 4610, and the second inlet 4612 and the outlet 4613 are separated by the valve core 462. When the valve core 462 is in the second position, as shown in FIG. Figure 46B As shown, the second inlet 4612 is connected to the outlet 4613 , and the first inlet 4611 is separated from the outlet 4613 by the valve core 462 .

[0164] Optional, see Figure 6 、 Figure 12 、 Figure 20 and Figure 27 As shown, Figure 6 、 Figure 12 、 Figure 20 and Figure 27 Another structure implemented using an integrated valve is shown. In this case, the heat pump system can include multiple second valve assemblies 47, with each second valve assembly 47 corresponding to a heat exchanger. Each second valve assembly 47 includes a valve body and a valve core. The valve body has a first inlet, a second inlet, a first outlet, and a second outlet. The valve core is disposed within the valve body and is used to selectively control the connection between the first inlet and the first outlet of the valve body, or the connection between the second inlet and the second outlet through a throttle hole. The first inlet of each second valve assembly 47 is connected to the outlet of the compressor 1, the second inlet of each second valve assembly 47 is connected to the outlet of the first common rail flow line 21, and the first and second outlets of each second valve assembly 47 are connected to the inlet of the corresponding heat exchanger.

[0165] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the valve core of the second valve assembly 47 of each heat exchanger to connect the corresponding inlet and outlet according to the requirements of the required operating mode.

[0166] For example, the structure of the second valve assembly 47 can be seen in Figure 47A and Figure 47B As shown, the valve body 471 is provided with a first inlet 4711, a second inlet 4712, a first outlet 4713, and a second outlet 4714. The valve core 472 is movably disposed in the valve body 471 and has a first position and a second position.

[0167] When the valve core 472 is in the first position, Figure 47A As shown, the first inlet 4711 is connected to the first outlet 4713 through the throttle hole 4710, and the second inlet 4712 and the second outlet 4714 are separated by the valve core 472. When the valve core 472 is in the second position, as shown in FIG. Figure 47B As shown, the second inlet 4712 is communicated with the second outlet 4714 , and the first inlet 4711 is separated from the first outlet 4713 by the valve core 472 .

[0168] It should be noted that in the embodiment of the present application, the valve bodies in the first valve assembly 46 and the second valve assembly 47 can have a structure similar to an expansion throttle valve, an injection valve, a capillary tube, etc. to achieve throttling, thereby achieving control of the flow rate in the throttling hole.

[0169] Correspondingly, in the embodiment of the present application, the outlet of each heat exchanger selectively communicates with the inlet of the compressor 1 or with the inlet of the first common rail flow line 21. That is, when the outlet of the heat exchanger needs to communicate with the inlets of the aforementioned two components, it can only communicate in one of these two ways. Therefore, a device with a switching function is also required between the outlet of each heat exchanger and the inlet of the first common rail flow line 21, and between the outlet of each heat exchanger and the inlet of the compressor 1, to meet the communication requirements of the heat exchanger outlet.

[0170] Similarly, in the embodiment of the present application, between the outlet of each heat exchanger and the inlet of the first common rail flow line 21, and between the outlet of each heat exchanger and the inlet of the compressor 1, two independent devices with switching functions can be used to implement the setting, but the setting can also be implemented by using an integrated valve.

[0171] Optional, see Figure 5 、 Figure 11 、 Figure 19 and Figure 26 As shown, Figure 5 、 Figure 11 、 Figure 19 and Figure 26 The structure shown here uses two independent devices with switching functions. In this case, the heat pump system includes multiple second switching devices 42 and multiple third switching devices 43. Each of the second and third switching devices 42, 43 corresponds to a heat exchanger. The inlet of each second switching device 42 communicates with the outlet of the corresponding heat exchanger, and the outlet of each second switching device 42 communicates with the inlet of the first common rail flow line 21. The inlet of each third switching device 43 communicates with the outlet of the corresponding heat exchanger, and the outlet of each third switching device 43 communicates with the inlet of the compressor 1.

[0172] Thus, when the heat pump system needs to operate in different modes, it is only necessary to control the second switch device 42 or the third switch device 43 of each heat exchanger according to the requirements of the desired operating mode. For example, when operating in cooling mode, it is only necessary to open the second switch device 42 of the outdoor heat exchanger 32 and close the third switch device 43 of the outdoor heat exchanger 32, open the third switch device 43 of the indoor heat exchanger 31, and close the second switch device 42 of the indoor heat exchanger 31. When operating in heating mode, it is only necessary to open the second switch device 42 of the indoor heat exchanger 31 and close the third switch device 43 of the indoor heat exchanger 31, open the third switch device 43 of the outdoor heat exchanger 32, and close the second switch device 42 of the outdoor heat exchanger 32.

[0173] It should be noted that, in the embodiment of the present application, the second switch device 42 can be implemented by a switch device with unidirectional flow restriction, for example Figure 5 As shown, the structure of the one-way valve 67 plus the stop valve can be used to avoid the refrigerant backflow. However, in actual application, the second switch device 42 can also be implemented by only using a device with a switch function, such as Figure 11 shown.

[0174] Optional, see Figure 4 、 Figure 10 、 Figure 18 and Figure 25 As shown, Figure 4 、 Figure 10 、 Figure 18 and Figure 25 A structure implemented using an integrated valve is shown. In this case, the heat pump system can include multiple third valve assemblies 48, with each third valve assembly 48 corresponding to a heat exchanger. Each third valve assembly 48 includes a valve body and a valve core. The valve body has a first outlet, a second outlet, and an inlet. The valve core is disposed within the valve body and is used to control whether the inlet of the valve body selectively communicates with the first outlet or the second outlet. The first outlet of each third valve assembly 48 communicates with the inlet of the compressor 1, the second outlet of each third valve assembly 48 communicates with the inlet of the first common rail flow line 21, and the inlet of each third valve assembly 48 communicates with the outlet of the corresponding heat exchanger.

[0175] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the valve core of the third valve assembly 48 of each heat exchanger to connect the inlet with the corresponding outlet according to the requirements of the required operating mode.

[0176] For example, the structure of the third valve assembly 48 can be seen in Figure 48A and Figure 48BAs shown, the valve body 481 is provided with a first outlet 4811, a second outlet 4812 and an inlet 4813. The valve core 482 is movably disposed in the valve body 481 and has a first position and a second position.

[0177] When the valve core 482 is in the first position, as shown in FIG. Figure 48A As shown, the first outlet 4811 is connected to the inlet 4813, and the second outlet 4812 is separated from the inlet 4813 by the valve core 482. When the valve core 482 is in the second position, as shown in FIG. Figure 48B As shown, the second outlet 4812 is connected to the inlet 4813 , and the first outlet 4811 and the inlet 4813 are separated by the valve core 482 .

[0178] Optional, see Figure 6 、 Figure 12 、 Figure 20 and Figure 27 As shown, Figure 6 、 Figure 12 、 Figure 20 and Figure 27 Another structure implemented using an integrated valve is shown. In this case, the heat pump system can include multiple fourth valve assemblies 49, with each fourth valve assembly 49 corresponding to a heat exchanger. Each fourth valve assembly 49 includes a valve body and a valve core. The valve body has a first inlet, a second inlet, a first outlet, and a second outlet. The valve core is disposed within the valve body and is used to selectively control the connection between the first inlet and the first outlet, or between the second inlet and the second outlet, of the valve body. The first outlet of each fourth valve assembly 49 is connected to the inlet of the compressor 1, and the second outlet of each fourth valve assembly 49 is connected to the inlet of the first common rail flow line 21. The first inlet and the second inlet of each fourth valve assembly 49 are connected to the outlet of the corresponding heat exchanger.

[0179] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the valve core of the fourth valve assembly 49 of each heat exchanger to connect the corresponding inlet and outlet according to the requirements of the required operating mode.

[0180] For example, the structure of the fourth valve assembly 49 can be seen in Figure 49A and Figure 49B As shown, the valve body 491 is provided with a first outlet 4911, a second outlet 4912, a first inlet 4913 and a second inlet 4914. The valve core 492 is movably disposed in the valve body 491 and has a first position and a second position.

[0181] When the valve core 492 is in the first position, Figure 49A As shown, the first outlet 4911 is connected to the first inlet 4913 through the throttle hole 4910, and the second outlet 4912 and the second inlet 4914 are separated by the valve core 492. When the valve core 492 is in the second position, as shown in FIG. Figure 49B As shown, the second outlet 4912 is communicated with the second inlet 4914 , and the first outlet 4911 and the first inlet 4913 are separated by the valve core 492 .

[0182] It should be noted that in the embodiment of the present application, the throttling device 40 can be implemented by an expansion throttle valve, an injection valve, a capillary tube, etc., and each switch device can be implemented by one or more switch structures such as a solenoid valve, a stop valve, a stop valve plus a check valve, etc.

[0183] It should be noted that in the embodiments of this application, see Figures 4 to 36 As shown, the heat pump system may further include a second common-rail flow line 22. The outlet of the compressor 1 is connected to the inlet of the second common-rail flow line 22, and the inlet of each heat exchanger is selectively connected to the outlet of the second common-rail flow line 22 or the outlet of the first common-rail flow line 21. In this way, the outlet of the compressor 1 and the inlet of each heat exchanger are connected through a single second common-rail flow line 22, simplifying the piping of the entire heat pump system.

[0184] Of course, in the embodiment of the present application, the inlet of each heat exchanger can also be connected to the outlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0185] Similarly, in the embodiments of this application, see Figures 4 to 36 As shown, the heat pump system may further include a third common-rail flow line 23. The inlet of the compressor 1 is connected to the outlet of the third common-rail flow line 23, and the outlet of each heat exchanger is selectively connected to the inlet of the third common-rail flow line 23 or the inlet of the first common-rail flow line 21. In this way, the inlet of the compressor 1 and the outlet of each heat exchanger are connected via a single third common-rail flow line 23, simplifying the piping of the entire heat pump system.

[0186] Of course, in the embodiment of the present application, the outlet of each heat exchanger can also be connected to the inlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0187] It should be noted that in the embodiment of the present application, the heat pump system may have only one indoor heat exchanger 31 and one outdoor heat exchanger 32. Alternatively, the heat pump system may have multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32. Alternatively, the heat pump system may have only one indoor heat exchanger 31 but multiple outdoor heat exchangers 32. Alternatively, the heat pump system may have only one outdoor heat exchanger 32 but multiple indoor heat exchangers 31.

[0188] In the embodiment of the present application, when the heat pump system has multiple outdoor heat exchangers 32 , more flexible defrost control can be achieved through the multiple outdoor heat exchangers 32 .

[0189] When the heat pump system has multiple outdoor heat exchangers 32, see Figure 23 and Figure 31 As shown, in heating and defrosting mode, the outlet of compressor 1 is connected to the inlet of indoor heat exchanger 31 and the inlet of a portion of outdoor heat exchanger 32. The outlets of the portion of outdoor heat exchanger 32 and the outlet of indoor heat exchanger 31 are connected to the inlet of the first common rail flow line 21. The outlet of the first common rail flow line 21 is connected to the inlet of another portion of outdoor heat exchanger 32 in a throttled manner. The outlet of the other portion of outdoor heat exchanger 32 is connected to the inlet of compressor 1. In this way, part of the high-temperature, high-pressure refrigerant output from compressor 1 enters the indoor heat exchanger 31 for heating, while another part enters the portion of outdoor heat exchanger 32 for heat dissipation and defrosting. The other portion of outdoor heat exchanger 32 receives the refrigerant output from the indoor heat exchanger 31 and the outdoor heat exchanger 32 after heat dissipation, absorbs the heat, and then outputs it to compressor 1, completing the entire refrigerant cycle.

[0190] It should be noted that in the heating-defrost mode, the identities of the outdoor heat exchangers 32 used for heating and defrosting and those used to absorb heat in conjunction with the indoor heat exchanger 31 can be optionally designated. That is, certain outdoor heat exchangers 32 can be pre-determined to be used exclusively for cooperating with the indoor heat exchanger 31 for indoor heating, while other outdoor heat exchangers 32 can be pre-determined to be used to connect to the outlet of the compressor 1 when the outdoor heat exchanger 32 is frosted or about to be frosted, thereby receiving high-temperature, high-pressure refrigerant for defrosting.

[0191] For example, see Figure 23 As shown, it is assumed that the outdoor heat exchanger A in the figure is specifically used to cooperate with the indoor heat exchanger 31 to absorb heat. When the outdoor heat exchanger A is frosted due to environmental factors and the action of the refrigerant, it switches to the heating and defrosting mode, and inputs part of the high-temperature and high-pressure refrigerant into the outdoor heat exchanger B, thereby realizing defrosting of the outdoor heat exchanger A through the outdoor heat exchanger B.

[0192] It should be understood that in the above solution, the outdoor heat exchanger 32 designated for defrosting and the outdoor heat exchanger 32 designated for cooperating with the indoor heat exchanger 31 for indoor heating should be located close to each other in space. In addition, in the design of the fan of the outdoor heat exchanger 32, the outdoor heat exchanger 32 for defrosting can be located at the upwind exit of the outdoor heat exchanger 32 designated for cooperating with the indoor heat exchanger 31 for indoor heating, so that the heat energy generated by the outdoor heat exchanger 32 for defrosting can be effectively transferred to the outdoor heat exchanger 32 for cooperating with the indoor heat exchanger 31 for indoor heating, thereby achieving defrosting of the outdoor heat exchanger 32.

[0193] Furthermore, in the heating-defrost mode, it is optional not to pre-set an outdoor heat exchanger 32 specifically for cooperating with the indoor heat exchanger 31 for indoor heating, and an outdoor heat exchanger 32 specifically for defrosting. Instead, when performing indoor heating, all or some of the outdoor heat exchangers 32 can be selected according to the setting method to cooperate with the indoor heat exchanger 31 for indoor heating. When one or some of the outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the mode is switched to the heating-defrost mode, and some of the refrigerant in a high-temperature and high-pressure state is input into the frosted outdoor heat exchanger 32 for defrosting. At this time, the unfrosted outdoor heat exchanger 32 is used to continue to cooperate with the indoor heat exchanger 31 for indoor heating.

[0194] For example, see Figure 23 As shown, it is assumed that initially both the outdoor heat exchanger A and the outdoor heat exchanger B cooperate with the indoor heat exchanger 31 to heat the room. When the outdoor heat exchanger B is frosted due to environmental factors and the effect of the refrigerant, it switches to the heating and defrosting mode, and some high-temperature and high-pressure refrigerant is input into the outdoor heat exchanger B, thereby achieving defrosting through the outdoor heat exchanger B. At the same time, the outdoor heat exchanger A still cooperates with the indoor heat exchanger 31 to heat the room (at this time, a Figure 23 When outdoor heat exchanger A is frosted due to environmental factors and the action of the refrigerant, some of the high-temperature and high-pressure refrigerant is input into outdoor heat exchanger A, and outdoor heat exchanger B is used to cooperate with indoor heat exchanger 31 to heat the room, thereby maintaining the normal operation of the entire heat pump system.

[0195] For example, see Figure 23As shown, it is assumed that initially the outdoor heat exchanger B cooperates with the indoor heat exchanger 31 to heat the room, and the outdoor heat exchanger A can be in an idle state (i.e., no refrigerant is introduced). When the outdoor heat exchanger B is frosted due to environmental factors and the effect of the refrigerant, it switches to the heating and defrosting mode, and some of the high-temperature and high-pressure refrigerant is input into the outdoor heat exchanger B, thereby achieving defrosting through the outdoor heat exchanger B. At the same time, the inlet of the outdoor heat exchanger A is connected to the first common rail flow pipe 21, and the outlet of the outdoor heat exchanger A is connected to the inlet of the compressor 1, so that the outdoor heat exchanger A is used to cooperate with the indoor heat exchanger 31 to heat the room (at this time, a Figure 23 When outdoor heat exchanger A is frosted due to environmental factors and the action of the refrigerant, some of the high-temperature and high-pressure refrigerant is input into outdoor heat exchanger A, and outdoor heat exchanger B is used to cooperate with indoor heat exchanger 31 to heat the room, thereby maintaining the normal operation of the entire heat pump system.

[0196] When the heat pump system has multiple outdoor heat exchangers 32, see also Figure 24 As shown, in the natural defrost mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31, the outlet of the indoor heat exchanger 31 is connected to the inlet of the first common rail flow pipe 21, the outlet of the first common rail flow pipe 21 is throttledly connected to the inlet of the unfrosted outdoor heat exchanger 32, and the outlet of the unfrosted outdoor heat exchanger 32 is connected to the inlet of the compressor 1; and the outlet of the compressor 1 is disconnected from the inlet of the frosted outdoor heat exchanger 32, and the outlet of the first common rail flow pipe 21 is also disconnected from the inlet of the frosted outdoor heat exchanger 32.

[0197] In this case, similar to the previous method, it is not necessary to pre-define an outdoor heat exchanger 32 specifically for use with the indoor heat exchanger 31 for indoor heating. Instead, when heating the room, all or some of the outdoor heat exchangers 32 can be selected to cooperate with the indoor heat exchanger 31 for indoor heating according to the set method. When one or more outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the system switches to natural defrost mode, disconnecting all refrigerant-accessible channels of the frosted outdoor heat exchanger 32, allowing it to defrost naturally. At this time, the unfrosted outdoor heat exchangers 32 continue to cooperate with the indoor heat exchanger 31 for indoor heating.

[0198] For example, see Figure 24As shown, it is assumed that initially both the outdoor heat exchanger A and the outdoor heat exchanger B cooperate with the indoor heat exchanger 31 to heat the room. When the outdoor heat exchanger B is frosted due to environmental factors and the action of the refrigerant, it switches to the natural defrost mode, disconnecting the passage between the inlet of the outdoor heat exchanger B and the outlet of the first common rail flow pipe 21, disconnecting the passage between the outlet of the outdoor heat exchanger B and the inlet of the compressor 1, and keeping the passage between the outlet of the outdoor heat exchanger B and the outlet of the compressor 1 disconnected, thereby allowing the outdoor heat exchanger B to defrost naturally, while the outdoor heat exchanger A continues to cooperate with the indoor heat exchanger 31 to heat the room (at this time, a Figure 24 When the outdoor heat exchanger A is frosted due to environmental factors and the action of the refrigerant, the passage between the inlet of the outdoor heat exchanger A and the outlet of the first common rail flow pipe 21 is disconnected, and the passage between the outlet of the outdoor heat exchanger A and the inlet of the compressor 1 is disconnected. At the same time, the outdoor heat exchanger B is used to cooperate with the indoor heat exchanger 31 to heat the room, thereby maintaining the normal operation of the entire heat pump system.

[0199] For example, see Figure 24 As shown, it is assumed that initially the outdoor heat exchanger B cooperates with the indoor heat exchanger 31 to heat the room, and the outdoor heat exchanger A is in an idle state. When the outdoor heat exchanger B is frosted due to environmental factors and the action of the refrigerant, it switches to the natural defrost mode, disconnects the passage between the inlet of the outdoor heat exchanger B and the outlet of the first common rail flow pipe 21, disconnects the passage between the outlet of the outdoor heat exchanger B and the inlet of the compressor 1, and keeps disconnecting the passage between the outlet of the outdoor heat exchanger B and the outlet of the compressor 1, so that the outdoor heat exchanger B defrosts naturally, and at the same time connects the passage between the inlet of the outdoor heat exchanger A and the outlet of the first common rail flow pipe 21, and connects the passage between the outlet of the outdoor heat exchanger A and the inlet of the compressor 1, so that the outdoor heat exchanger A cooperates with the indoor heat exchanger 31 to heat the room (at this time, the outdoor heat exchanger A appears). Figure 24 When the outdoor heat exchanger A is frosted due to environmental factors and the action of the refrigerant, the passage between the inlet of the outdoor heat exchanger A and the outlet of the first common rail flow pipe 21 is disconnected, and the passage between the outlet of the outdoor heat exchanger A and the inlet of the compressor 1 is disconnected. At the same time, the outdoor heat exchanger B is used to cooperate with the indoor heat exchanger 31 to heat the room, thereby maintaining the normal operation of the entire heat pump system.

[0200] In the embodiment of the present application, when the heat pump system has multiple indoor heat exchangers 31 , more flexible indoor dehumidification control can be achieved through the multiple indoor heat exchangers 31 .

[0201] When the heat pump system has multiple indoor heat exchangers 31, see Figure 15 、 Figure 17 and Figure 33As shown, in the dehumidification mode, the outlet of the compressor 1 is connected to the inlet of a portion of the indoor heat exchanger 31, the outlet of the portion of the indoor heat exchanger 31 is connected to the inlet of the first common rail flow pipe 21, the outlet of the first common rail flow pipe 21 is throttledly connected to the inlet of another portion of the indoor heat exchanger 31, and the outlet of the other portion of the indoor heat exchanger 31 is connected to the inlet of the compressor 1.

[0202] At this time, you can refer to Figure 33 and Figure 34 As shown, a feasible indoor dehumidification method is to disconnect the passage between the outlet of the first common rail flow pipe 21 and the inlet of the outdoor heat exchanger 32, and at the same time disconnect the passage between the outlet of the compressor 1 and the inlet of the outdoor heat exchanger 32, so as to form a refrigerant circulation loop while realizing indoor dehumidification only by relying on each indoor heat exchanger 31.

[0203] In addition, see Figure 15 As shown, another feasible indoor dehumidification method is: in the heating and dehumidification mode, the outlet of the first common rail flow pipe 21 is also connected to the inlet of the outdoor heat exchanger 32 in a throttled manner, and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1. In this way, the outdoor heat exchanger 32 is used to absorb heat in conjunction with the indoor heat exchanger 31, thereby diverting some of the medium-temperature and high-pressure refrigerant to the outside, thereby improving the indoor heating effect.

[0204] In addition, see Figure 17 As shown, another feasible indoor dehumidification method is: in defrost and dehumidification mode, the outlet of compressor 1 is also connected to the inlet of outdoor heat exchanger 32, the outlet of outdoor heat exchanger 32 is connected to the inlet of first common rail flow pipe 21, and the outlet of first common rail flow pipe 21 is connected to the inlet of another indoor heat exchanger 31 in a throttled manner. In this way, outdoor heat exchanger 32 is connected to high-temperature, high-pressure refrigerant, thereby achieving dehumidification indoors and defrosting outdoors simultaneously.

[0205] It should be noted that in the embodiment of the present application, when dehumidification is performed, the indoor heat exchanger 31 close to the upstream side of the air flow can be set for cooling, and the indoor heat exchanger 31 close to the downstream side of the air flow can be set for heating to obtain a better dehumidification effect, but this is not a limitation.

[0206] It should also be noted that in the embodiment of the present application, when dehumidifying, throttled refrigerant can first be introduced into at least one indoor heat exchanger 31 on the upstream side of the airflow to achieve cooling and dehumidification. Then, high-temperature, high-pressure refrigerant can be introduced into the indoor heat exchanger 31 on the downstream side of the airflow to heat the air. At this point, dry hot air can also be blown toward locations such as glass to achieve a demisting function.

[0207] It should be noted that in the embodiment of the present application, when the heat pump system has multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32, in addition to realizing the above-mentioned mode, another defrosting and dehumidification mode can also be realized through the cooperation of multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32.

[0208] See Figure 32 As shown, at this time, the outlet of the compressor 1 is respectively connected to the inlet of a portion of the indoor heat exchanger 31 and the inlet of a portion of the outdoor heat exchanger 32, the outlets of a portion of the indoor heat exchanger 31 and a portion of the outdoor heat exchanger 32 are connected to the inlet of the first common rail flow pipe 21, the outlet of the first common rail flow pipe 21 is throttledly connected to the inlets of another portion of the indoor heat exchanger 31 and another portion of the outdoor heat exchanger 32, and the outlets of another portion of the indoor heat exchanger 31 and another portion of the outdoor heat exchanger 32 are connected to the inlet of the compressor 1.

[0209] In this way, some outdoor heat exchangers 32 can be used in conjunction with the indoor heat exchanger 31 for heating and dehumidification (i.e., refrigerant is introduced into some outdoor heat exchangers 32 after throttling to absorb heat and cool the room), while also leveraging the advantages of multiple outdoor heat exchangers 32 to achieve more flexible defrost control. For example, some outdoor heat exchangers 32 can be designated to absorb heat to cooperate with the indoor heat exchanger 31 for heating and dehumidification. After these outdoor heat exchangers 32 frost due to heat absorption, other outdoor heat exchangers 32 are connected to high-temperature, high-pressure refrigerant to heat and defrost these outdoor heat exchangers 32. For another example, it is not necessary to designate an outdoor heat exchanger 32 specifically for absorbing heat to cooperate with the indoor heat exchanger 31 for heating and dehumidification. Instead, when the outdoor heat exchanger 32 currently used to absorb heat to cooperate with the indoor heat exchanger 31 for heating and dehumidification is frosted, other outdoor heat exchangers 32 are used to absorb heat to cooperate with the indoor heat exchanger 31 for heating and dehumidification, and refrigerant in a high-temperature and high-pressure state is input into these frosted outdoor heat exchangers 32 for heating and defrosting.

[0210] In order to better illustrate the solution of the embodiment of the present application, the heat pump system provided in the embodiment of the present application is illustrated below with several specific example structures.

[0211] Example 1:

[0212] See also Figures 4 to 9 As shown, the heat pump system includes an indoor heat exchanger 31 and an outdoor heat exchanger 32 .

[0213] In cooling mode, see Figure 4As shown, the flow from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2 are open. The flow from the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2 are closed. The size of the throttling passage from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1 is adjusted according to system requirements.

[0214] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22, then enters the first valve assembly In2 through the connecting piping. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In2 flows into the outdoor heat exchanger 32, where it releases heat due to the operation of the outdoor fan 52. After releasing heat, the medium-temperature, high-pressure refrigerant flows through the third valve assembly Out2 into the first common rail flow line 21. The refrigerant then passes through the first valve assembly In1 (In1-1 to In1-3), undergoes throttling and pressure reduction, and enters the indoor heat exchanger 31. With the operation of the indoor fan 51, it absorbs heat and cools the target space air to a comfortable temperature. The refrigerant, having absorbed heat, passes through the third valve assembly Out1 (Out1-1 to Out1-2) into the third common rail flow line 23, and then enters compressor 1 for the next cycle.

[0215] In heating mode, see Figure 8 As shown, the flow from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2 are closed. The flow from the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2 are open. The size of the throttling passage from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2 is adjusted according to system requirements.

[0216] At this time, the compressor 1 discharges the high-temperature, high-pressure refrigerant into the second common rail flow line 22, and then enters the first valve assembly In1 through the connecting pipe. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In1 flows into the indoor heat exchanger 31, where it releases heat through the operation of the indoor fan 51, heating the target space. The medium-temperature, high-pressure refrigerant that has released heat flows into the first common rail flow line 21 through the third valve assembly Out1. The refrigerant then passes through the first valve assembly In2 (In2-1 to In2-3) for throttling and pressure reduction, then enters the outdoor heat exchanger 32, where it absorbs heat under the operation of the outdoor fan 52. The refrigerant that has absorbed heat passes through the third valve assembly Out2 (Out2-1 to Out2-2) into the third common rail flow line 23, and then enters the compressor 1 for the next cycle.

[0217] In defrost mode, see Figure 9 As shown, the flow from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2 are open. The flow from the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, and the flow from the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2 are closed. The size of the throttling passage from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1 is adjusted according to system requirements.

[0218] At this time, the compressor 1 discharges the refrigerant in a high-temperature and high-pressure state, enters the second common rail flow line 22, and then enters the first valve assembly In2 through the connecting pipe. The refrigerant in a high-temperature and high-pressure state that has passed through the first valve assembly In2 flows into the outdoor heat exchanger 32 to defrost the outdoor heat exchanger 32. The refrigerant in a medium-temperature and high-pressure state after releasing heat flows into the first common rail flow line 21 through the third valve assembly Out2. The refrigerant then passes through the first valve assembly In1 (In1-1 to In1-3) for throttling and pressure reduction and enters the indoor heat exchanger 31. The refrigerant that has absorbed heat passes through the third valve assembly Out1 (Out1-1 to Out1-2) into the third common rail flow line 23, and then enters the compressor 1 for the next cycle. During this period, the indoor fan 51 and the outdoor fan 52 can be turned on or off according to actual needs.

[0219] Example 2:

[0220] See also Figures 10 to 17 As shown, the heat pump system includes two indoor heat exchangers 31 and one outdoor heat exchanger 32 .

[0221] In cooling mode, see Figure 13 As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are open. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are closed. The sizes of the throttling passage from the inlet In1 - 1 to the outlet In1 - 3 of the first valve assembly In1 and the throttling passage from the inlet In2 - 2 to the outlet In2 - 3 of the first valve assembly In2 are adjusted according to system requirements.

[0222] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then enters the first valve assembly In3 through the connecting piping. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In3 flows into the outdoor heat exchanger 32, where it releases heat due to the operation of the outdoor fan 52. After releasing heat, the medium-temperature, high-pressure refrigerant passes through the third valve assembly Out3. The refrigerant then passes through the first valve assembly In1 (In1-1 to In1-3) and the first valve assembly In2 (In2-2 to In2-3), where it is throttled and reduced in pressure, before entering the two indoor heat exchangers A and B, respectively. Under the operation of the indoor fan 51, the air in the target space is cooled and heat is absorbed, reaching a comfortable temperature. The heat-absorbed refrigerant then passes through the third valve assembly Out1 (Out1-1 to Out1-2) and the third valve assembly Out2 (Out2-1 to Out2-3), enters the third common rail flow line 23, and then enters compressor 1 for the next cycle.

[0223] It should be noted that in actual application, depending on the difference in operating load, one of the indoor heat exchangers A and B can be selectively turned on according to actual conditions, or all of them can be turned on as shown above.

[0224] In heating mode, see Figure 14As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are closed. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are opened. The size of the throttling channel from the inlet In3 - 1 to the outlet In3 - 3 of the first valve component In3 is adjusted according to the requirements of the system.

[0225] At this time, the compressor 1 discharges the high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then enters the first valve assembly In1 and the first valve assembly In2 through the connecting pipe. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In1 and the first valve assembly In2 flows into the indoor heat exchanger 31, where it releases heat through the operation of the indoor fan 51, heating the target space. The medium-temperature, high-pressure refrigerant after heat release passes through the third valve assembly Out1 and the third valve assembly Out2. The refrigerant then passes through the first valve assembly In3 (In3-1 to In3-3), where it is throttled and depressurized, and then enters the outdoor heat exchanger 32, where it absorbs heat under the operation of the outdoor fan 52. The refrigerant that has absorbed heat passes through the third valve assembly Out3 into the third common rail flow line 23, and then enters the compressor 1 for the next cycle.

[0226] It should be noted that in actual application, depending on the difference in operating load, one of the indoor heat exchangers A and B can be selectively turned on according to actual conditions, or all of them can be turned on as shown above.

[0227] In heating and dehumidification mode, see Figure 15As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are open. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are closed. The sizes of the throttling passage from the inlet In1 - 1 to the outlet In1 - 3 of the first valve assembly In1 and the throttling passage from the inlet In3 - 1 to the outlet In3 - 3 of the first valve assembly In3 are adjusted according to system requirements.

[0228] At this point, compressor 1 discharges the high-temperature, high-pressure refrigerant, which enters the second common-rail flow line 22 and then enters the first valve assembly In2 through the connecting pipe. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In2 flows into the indoor heat exchanger B, heating the target space. After releasing heat, the medium-temperature, high-pressure refrigerant passes through the third valve assembly Out2 and is divided into two parts. One part passes through the first valve assembly In1 for throttling and pressure reduction before entering the indoor heat exchanger A to dehumidify the target space. The refrigerant that has absorbed heat passes through the third valve assembly Out1 and enters the third common-rail flow line 23. The other part passes through the first valve assembly In3 and enters the outdoor heat exchanger 32. The refrigerant that has absorbed heat passes through the third valve assembly Out3 and enters the third common-rail flow line 23, then enters compressor 1 for the next cycle.

[0229] In defrost mode, see Figure 16As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are open. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are closed. The sizes of the throttling passage from the inlet In1 - 1 to the outlet In1 - 3 of the first valve assembly In1 and the throttling passage from the inlet In2 - 2 to the outlet In2 - 3 of the first valve assembly In2 are adjusted according to system requirements.

[0230] At this time, the compressor 1 discharges the high-temperature, high-pressure refrigerant into the second common rail flow line 22. It enters the first valve assembly In3 through the connecting pipe. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In3 flows into the outdoor heat exchanger 32, defrosting the outdoor heat exchanger 32. The medium-temperature, high-pressure refrigerant that has released heat passes through the third valve assembly Out3. The refrigerant then passes through the first valve assembly In1 (In1-1 to In1-3) and the first valve assembly In2 (In2-2 to In2-3), where it is throttled and depressurized, and then enters the two indoor heat exchangers A and B respectively. The refrigerant that has absorbed heat passes through the third valve assembly Out1 (Out1-1 to Out12) and the third valve assembly Out2 (Out2-1 to Out2-3) into the third common rail flow line 23, and then enters the compressor 1 for the next cycle.

[0231] In the dehumidification and defrost mode, see Figure 17As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are open. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are closed. The size of the throttling channel from the inlet In1 - 1 to the outlet In1 - 3 of the first valve assembly In1 is adjusted according to system requirements.

[0232] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. The refrigerant is then split into two paths. One path passes through the connecting pipe and enters the first valve assembly In3. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In3 flows into the outdoor heat exchanger 32, defrosting it. The medium-temperature, high-pressure refrigerant, having released heat, passes through the third valve assembly Out3. The other path, the high-temperature, high-pressure refrigerant that has passed through the first valve assembly In2, enters the indoor heat exchanger B, heating the dehumidified air in the target space. The medium-temperature, high-pressure refrigerant that has released heat then passes through the third valve assembly Out2. The refrigerant that has passed through the third valve assemblies Out2 and Out3 is throttled and reduced in pressure by the first valve assembly In1 before entering the indoor heat exchanger A, dehumidifying the air in the target space. The refrigerant that has absorbed heat passes through the third valve assembly Out1 and enters the third common rail flow line 23, then enters compressor 1 for the next cycle.

[0233] It should be noted that during this period, the indoor fan 51 and the outdoor fan 52 operate according to actual conditions.

[0234] Example 3:

[0235] See also Figures 18 to 24 As shown, the heat pump system includes one indoor heat exchanger 31 and two outdoor heat exchangers 32 .

[0236] In cooling mode, see Figure 21As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are open. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are closed. The size of the throttling channel from the inlet In1 - 1 to the outlet In1 - 3 of the first valve assembly In1 is adjusted according to system requirements.

[0237] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then enters the first valve assembly In2 and the first valve assembly In3 through connecting piping. The high-temperature, high-pressure refrigerant that has passed through the first valve assemblies In2 ​​and In3 flows into the outdoor heat exchangers A and B, respectively, where it releases heat through the operation of the outdoor fan 52. After releasing heat, the medium-temperature, high-pressure refrigerant passes through the third valve assemblies Out2 and Out3. The refrigerant then passes through the first valve assembly In1 (In1-1 to In1-3), undergoes throttling and pressure reduction, and enters the indoor heat exchanger 31. Under the operation of the indoor fan 51, the air in the target space is cooled and heat is absorbed, reaching a comfortable temperature. The heat-absorbing refrigerant then passes through the third valve assembly Out1 and enters the third common rail flow line 23, before entering compressor 1 for the next cycle.

[0238] It should be noted that, in actual application, depending on the difference in operating load, one of the outdoor heat exchangers A and B can be selectively turned on according to actual conditions, or all of them can be turned on as shown above.

[0239] In heating mode, see Figure 22As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are closed. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are opened. The sizes of the throttling passage from the inlet In2 - 1 to the outlet In2 - 3 of the first valve assembly In2 and the throttling passage from the inlet In3 - 2 to the outlet In3 - 3 of the first valve assembly In3 are adjusted according to system requirements.

[0240] At this time, the compressor 1 discharges the refrigerant in a high-temperature and high-pressure state and enters the second common rail flow line 22. It enters the first valve assembly In1 through the connecting pipe. The refrigerant in a high-temperature and high-pressure state that has passed through the first valve assembly In1 flows into the indoor heat exchanger 31, releases heat through the operation of the indoor fan 51, and heats the target space. The refrigerant in a medium-temperature and high-pressure state after heat release passes through the third valve assembly Out1. The refrigerant then passes through the first valve assembly In2 and the first valve assembly In2 for throttling and pressure reduction, and then enters the outdoor heat exchanger A and the outdoor heat exchanger B, where it absorbs heat under the operation of the outdoor fan 52. The refrigerant that has absorbed heat passes through the third valve assembly Out2 and the third valve assembly Out3 into the third common rail flow line 23, and then enters the compressor 1 for the next cycle.

[0241] It should be noted that, in actual application, depending on the difference in operating load, one of the outdoor heat exchangers A and B can be selectively turned on according to actual conditions, or all of them can be turned on as shown above.

[0242] In defrost mode, see Figure 23As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3 are closed. The inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, and the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3 are opened. The size of the throttling channel from the inlet In2 - 1 to the outlet In2 - 3 of the first valve assembly In2 is adjusted according to the requirements of the system.

[0243] At this point, compressor 1 discharges the high-temperature, high-pressure refrigerant into the second common rail flow line 22. The refrigerant is divided into two parts. One part passes through the first valve assembly In1 and enters the indoor heat exchanger 31, where it heats the target space. After releasing heat, the medium-temperature, high-pressure refrigerant enters the third valve assembly Out1. The other part enters the first valve assembly In3. The refrigerant passing through the first valve assembly In3 flows into the outdoor heat exchanger B, where it defrosts the outdoor heat exchanger 32. After releasing heat, the medium-temperature, high-pressure refrigerant passes through the third valve assembly Out3. The refrigerant then passes through the first valve assembly In2 for throttling and pressure reduction before entering the outdoor heat exchanger A. After absorbing heat, the refrigerant passes through the third valve assembly Out2 and enters the third common rail flow line 23, where it then enters compressor 1 for the next cycle.

[0244] It should be noted that during this period, the outdoor fan 52 can be turned on or off according to actual conditions.

[0245] Example 4:

[0246] See also Figures 25 to 32 As shown, the heat pump system includes two indoor heat exchangers 31 and two outdoor heat exchangers 32 .

[0247] In cooling mode, see Figure 28As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet In4-1 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-2 of the third valve assembly Out4 are open. The flow paths from the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, from the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, from the inlet In4-2 to the outlet In4-3 of the first valve assembly In4, from the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, from the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, from the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3, and from the inlet Out4-1 to the outlet Out4-3 of the third valve assembly Out4 are closed. The sizes of the throttling passages from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1 and from the inlet In1-2 to the outlet In1-3 of the first valve assembly In2 are adjusted according to system requirements.

[0248] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then passes through connecting piping and enters the first valve assemblies In3 and In4. The high-temperature, high-pressure refrigerant, having passed through the first valve assemblies In3 and In4, flows into the outdoor heat exchangers A and B, respectively, where it releases heat through the operation of the outdoor fan 52. The medium-temperature, high-pressure refrigerant then passes through the third valve assemblies Out3 and Out4. The refrigerant then passes through the first valve assemblies In1 and In2, where it is throttled and reduced in pressure, before entering the indoor heat exchangers A and B. Under the operation of the indoor fan 51, it absorbs heat and cools the target space air to a comfortable temperature. The refrigerant, having absorbed heat, passes through the third valve assemblies Out1 and Out2, enters the third common rail flow line 23 and then enters compressor 1 for the next cycle.

[0249] It should be noted that in actual applications, depending on the difference in operating load, one of the indoor heat exchangers A and B can be selectively turned on according to actual conditions, or both can be turned on as shown above. Similarly, one of the outdoor heat exchangers A and B can also be selectively turned on according to actual conditions, or both can be turned on as shown above.

[0250] In heating mode, see Figure 29 As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet In4-1 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-2 of the third valve assembly Out4 are closed. The flow from the inlet In1-2 of the first valve assembly In1 to the outlet In1-3, the flow from the inlet In2-1 of the first valve assembly In2 to the outlet In2-3, the flow from the inlet In3-1 of the first valve assembly In3 to the outlet In3-3, the flow from the inlet In4-2 of the first valve assembly In4 to the outlet In4-3, the flow from the inlet Out1-1 of the third valve assembly Out1 to the outlet Out1-3, the flow from the inlet Out2-1 of the third valve assembly Out2 to the outlet Out2-2, the flow from the inlet Out3-1 of the third valve assembly Out3 to the outlet Out3-2, and the flow from the inlet Out4-1 of the third valve assembly Out4 to the outlet Out4-3 are open. The sizes of the throttling passages from the inlet In3-1 of the first valve assembly In3 to the outlet In3-3 and from the inlet In4-2 of the first valve assembly In4 to the outlet In4-3 are adjusted according to system requirements.

[0251] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then enters the first valve assembly In1 and the first valve assembly In2 through connecting piping. The high-temperature, high-pressure refrigerant that has passed through the first valve assemblies In1 and In2 flows into the indoor heat exchangers A and B, respectively, where it releases heat through the operation of the indoor fan 51, providing heat to the target space and achieving a comfortable temperature. The medium-temperature, high-pressure refrigerant then passes through the third valve assemblies Out1 and Out2. The refrigerant then passes through the first valve assemblies In3 and In4, respectively, for throttling and pressure reduction, before entering the outdoor heat exchangers A and B, where it absorbs heat under the operation of the outdoor fan 52. After absorbing heat, the refrigerant passes through the third valve assemblies Out3 and Out4, enters the third common rail flow line 23, and then enters compressor 1 for the next cycle.

[0252] It should be noted that in actual applications, depending on the difference in operating load, one of the indoor heat exchangers A and B can be selectively turned on according to actual conditions, or both can be turned on as shown above. Similarly, one of the outdoor heat exchangers A and B can also be selectively turned on according to actual conditions, or both can be turned on as shown above.

[0253] In dehumidification mode, see Figure 30 As shown, the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet In4-1 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-2 of the third valve assembly Out4 are closed. The flow from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the flow from the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the flow from the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the flow from the inlet In4-2 to the outlet In4-3 of the first valve assembly In4, the flow from the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the flow from the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, the flow from the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3, and the flow from the inlet Out4-1 to the outlet Out4-3 of the third valve assembly Out4 are open. The sizes of the throttling passages from the inlet In1-1 to the outlet In3-3 of the first valve assembly In1, the throttling passages from the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, and the throttling passages from the inlet In4-2 to the outlet In4-3 of the first valve assembly In4 are adjusted according to system requirements.

[0254] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. It then enters the first valve assembly In2 through connecting piping. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In2 flows into indoor heat exchanger B, where it releases heat through the operation of the indoor fan 51, warming the dehumidified air. The medium-temperature, high-pressure refrigerant then passes through the third valve assembly Out2. A portion of the refrigerant then passes through the first valve assembly In2 for throttling and pressure reduction before entering indoor heat exchanger A, dehumidifying the air in the target space. Finally, the refrigerant passes through the third valve assembly Out1 and enters the third common rail flow line 23. Another portion of the refrigerant passes through the first valve assemblies In3 and In4 for throttling and pressure reduction before entering outdoor heat exchangers A and B, where it absorbs heat under the operation of the outdoor fan 52. The refrigerant, having absorbed heat, passes through the third valve assemblies Out3 and Out4, enters the third common rail flow line 23, and then enters compressor 1 for the next cycle.

[0255] It should be noted that in actual application, depending on the difference in operating load, the outdoor heat exchangers A and B can be both closed, or one of them can be selectively opened according to actual conditions, or all can be opened as shown above.

[0256] In heating defrost mode, see Figure 31 As shown, the inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet In4-2 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-3 of the third valve assembly Out4 are closed. The flow from the inlet In1-2 of the first valve assembly In1 to the outlet In1-3, the flow from the inlet In2-1 of the first valve assembly In2 to the outlet In2-3, the flow from the inlet In3-1 of the first valve assembly In3 to the outlet In3-3, the flow from the inlet In4-1 of the first valve assembly In4 to the outlet In4-3, the flow from the inlet Out1-1 of the third valve assembly Out1 to the outlet Out1-3, the flow from the inlet Out2-1 of the third valve assembly Out2 to the outlet Out2-2, the flow from the inlet Out3-1 of the third valve assembly Out3 to the outlet Out3-2, and the flow from the inlet Out4-1 of the third valve assembly Out4 to the outlet Out4-2 are open. The size of the throttling passage from the inlet In3-1 of the first valve assembly In3 to the outlet In3-3 is adjusted according to system requirements.

[0257] At this point, compressor 1 discharges high-temperature, high-pressure refrigerant into the second common rail flow line 22. A portion of the refrigerant passes through the connecting piping and enters the first valve assembly In1 and the first valve assembly In2. This high-temperature, high-pressure refrigerant flows into indoor heat exchangers A and B, where it releases heat through the operation of the indoor fan 51, providing heat to the target space and achieving a comfortable temperature. The intermediate-temperature, high-pressure refrigerant, after releasing heat, passes through the third valve assemblies Out1 and Out2. Another portion of the high-temperature, high-pressure refrigerant passes through the first valve assembly In4 and enters the outdoor heat exchanger B, where it defrosts due to the operation of the outdoor fan 52. This intermediate-temperature, high-pressure refrigerant passes through the third valve assembly Out4. This intermediate-temperature, high-pressure refrigerant then passes through the first valve assembly In3, where it is throttled and reduced in pressure, before entering the outdoor heat exchanger A, where it absorbs heat due to the operation of the outdoor fan 52. This heat-absorbed refrigerant passes through the third valve assembly Out3 and enters the third common rail flow line 23, where it then enters compressor 1 for the next cycle.

[0258] It should be noted that, in actual application, depending on the difference in operating load, one of the indoor heat exchangers A and B may be selectively turned on according to actual conditions, or all of them may be turned on as shown above.

[0259] In the dehumidification and defrost mode, see Figure 32As shown, the inlet In1-2 to the outlet In1-3 of the first valve assembly In1, the inlet In2-2 to the outlet In2-3 of the first valve assembly In2, the inlet In3-2 to the outlet In3-3 of the first valve assembly In3, the inlet In4-2 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-3 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-3 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-3 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-3 of the third valve assembly Out4 are closed. The inlet In1-1 to the outlet In1-3 of the first valve assembly In1, the inlet In2-1 to the outlet In2-3 of the first valve assembly In2, the inlet In3-1 to the outlet In3-3 of the first valve assembly In3, the inlet In4-1 to the outlet In4-3 of the first valve assembly In4, the inlet Out1-1 to the outlet Out1-2 of the third valve assembly Out1, the inlet Out2-1 to the outlet Out2-2 of the third valve assembly Out2, the inlet Out3-1 to the outlet Out3-2 of the third valve assembly Out3, and the inlet Out4-1 to the outlet Out4-2 of the third valve assembly Out4 are open. The sizes of the throttling passages from the inlet In1-1 to the outlet In1-3 of the first valve assembly In1 and from the inlet In3-1 to the outlet In3-3 of the first valve assembly In3 are adjusted according to system requirements.

[0260] At this point, compressor 1 discharges the high-temperature, high-pressure refrigerant into the second common rail flow line 22. A portion of the refrigerant enters the first valve assembly In2 through the connecting pipe. The high-temperature, high-pressure refrigerant that has passed through the first valve assembly In2 flows into the indoor heat exchanger B, where it releases heat through the operation of the indoor fan 51, providing heat to the dehumidified air in the target space and maintaining a comfortable temperature. The medium-temperature, high-pressure refrigerant that has released heat passes through the third valve assembly Out2. The remaining portion of the high-temperature, high-pressure refrigerant passes through the first valve assembly In4 and enters the outdoor heat exchanger B, where it is defrosted by the operation of the outdoor fan 52. The medium-temperature, high-pressure refrigerant that has released heat passes through the third valve assembly Out4. Subsequently, the refrigerant in the medium-temperature and high-pressure state is also divided into two parts. One part enters the outdoor heat exchanger A after being throttled and reduced in pressure by the first valve assembly In3, and absorbs heat under the operation of the outdoor fan 52. The refrigerant after absorbing heat passes through the third valve assembly Out3 and enters the third common rail flow pipeline 23; the other part of the refrigerant in the medium-temperature and high-pressure state enters the indoor heat exchanger A after being throttled and reduced in pressure by the first valve assembly In1, and is dehumidified under the operation of the indoor fan 51. The refrigerant after absorbing heat passes through the third valve assembly Out1 and enters the third common rail flow pipeline 23, and then enters the compressor 1 for the next cycle.

[0261] The above examples illustrate four specific situations in the embodiments of the present application, namely, the heat pump system has one indoor heat exchanger 31, one outdoor heat exchanger 32, two indoor heat exchangers 31, one outdoor heat exchanger 32, one indoor heat exchanger 31, two outdoor heat exchangers 32, and two indoor heat exchangers 31 and two outdoor heat exchangers 32. For the situation with more than two indoor heat exchangers 31 and one outdoor heat exchanger 32, the situation with two indoor heat exchangers 31 and one outdoor heat exchanger 32 can be referred to, and the overall working logic of the two is consistent. Similarly, for the situation with one indoor heat exchanger 31 and more than two outdoor heat exchangers 32, the situation with one indoor heat exchanger 31 and two outdoor heat exchangers 32 can be referred to, and the overall working logic of the two is consistent. Similarly, for the situation with more than two indoor heat exchangers 31 and more than two outdoor heat exchangers 32, the situation with two indoor heat exchangers 31 and two outdoor heat exchangers 32 can be referred to, and the overall working logic of the two is consistent.

[0262] It should be noted that in the examples of this application, see Figure 35 and Figure 36 As shown, the heat pump system may further include a high-pressure tank 61 .

[0263] In the embodiment of the present application, the high pressure tank 61 can be connected between the outlet of the compressor 1 and the inlet of each heat exchanger. Figure 36 As shown, when the second common rail throughflow line 22 is provided, the high-pressure tank 61 can be arranged on the second common rail throughflow line 22 .

[0264] In addition, in the embodiment of the present application, the high pressure tank 61 can be connected between the outlet of each heat exchanger and the inlet of other heat exchangers. Figure 35 As shown, the high-pressure tank 61 can be arranged on the first common rail throughflow line 21 .

[0265] It should be noted that, in the embodiment of the present application, the high-pressure tank 61 can be implemented by a single container, or by an existing drying bottle, or a container with a desiccant and a filter, but this is not a limitation.

[0266] In the embodiment of the present application, after the high-pressure tank 61 is provided, the high-pressure refrigerant flowing through the high-pressure tank 61 can be stored in the high-pressure tank 61, thereby achieving balanced control of the pressure of the refrigerant in the entire thermal system.

[0267] Furthermore, if a high-pressure tank 61 is installed between the outlet of compressor 1 and the inlets of each heat exchanger, the high-pressure refrigerant remaining in tank 61 can continue to supply the entire system after compressor 1 stops, allowing the heat pump system to continue operating normally. In other words, high-pressure tank 61 replaces compressor 1 as the system's power source, ensuring the operation of the heat pump system.

[0268] Based on this, in an embodiment of the present application, when the demand of the heat pump system is lower than the output capacity of the compressor 1, the compressor 1 can stop running, thereby utilizing the high-pressure tank 61 to maintain the operation of the heat pump system, thereby reducing energy consumption; at the same time, since the refrigerant in the heat pump system still maintains normal circulation during the period when the compressor 1 stops running, the compressor 1 can directly increase its speed to the most efficient speed when it is started again, thereby reducing the activation energy consumption of the compressor 1.

[0269] It should be noted that in the examples of this application, see Figure 35 and Figure 36 As shown, the heat pump system may further include a low-pressure tank 62, and the low-pressure tank 62 is connected between the inlet of the compressor 1 and the outlet of each heat exchanger. For example, when a third common rail flow line 23 is provided, the low-pressure tank 62 may be disposed on the third common rail flow line 23.

[0270] In the embodiment of the present application, after the low-pressure tank 62 is provided, the refrigerant in a low-pressure state flowing through the low-pressure tank 62 can be stored in the low-pressure tank 62, thereby achieving balanced control of the pressure of the refrigerant in the entire thermal system.

[0271] It should be noted that in the embodiment of the present application, the low-pressure tank 62 can also be implemented by a single container, or by an existing gas-liquid separator, or a container with a desiccant and a filter, but this is not a limitation.

[0272] It should be noted that in the examples of this application, see Figure 35 and Figure 36 As shown, the heat pump system may further include a regenerator 63, which is arranged on the first common rail flow line 21 and the third common rail flow line 23, so as to realize heat exchange between the refrigerant in a medium-temperature and high-pressure state flowing through the first common rail flow line 21 and the refrigerant in a low-temperature and low-pressure state flowing through the third common rail flow line 23, so that the refrigerant in the medium-temperature and high-pressure state is cooled to a certain extent before throttling, thereby improving the refrigeration performance of the refrigerant before throttling and achieving a better effect after throttling.

[0273] In the embodiment of the present application, the regenerator 63 can be implemented by a two-phase medium heat exchanger such as a stacked heat exchanger, a shell and tube heat exchanger, a shell and tube heat exchanger, a plate-fin heat exchanger, or a plate heat exchanger, but this is not a limitation.

[0274] It is also important to note that see Figure 35 and Figure 36 As shown, in the embodiment of the present application, the heat pump system may further include an auxiliary heat device 64 (e.g., an air-to-air heater (APTC)). The auxiliary heat device 64 may be disposed in the same space as the indoor heat exchanger 31, for example, in the same housing. Thus, when the heating capacity of the indoor heat exchanger 31 of the heat pump system is insufficient, the auxiliary heat device 64 may be activated to provide additional heat. The amount of heat required to be supplemented may be determined based on the load differential of the heat pump system.

[0275] For example, for a heat pump system structure having only one indoor heat exchanger 31, if dehumidification is required, the indoor heat exchanger 31 can be controlled to cool, and the auxiliary heat exchanger 64 can be controlled to heat, to prevent the internal temperature of the target space from dropping due to dehumidification, thereby achieving heating and dehumidification.

[0276] For example, during the defrosting process of the outdoor heat exchanger 32, at least one indoor heat exchanger 31 is cooling. In order to maintain the temperature of the target space, the auxiliary heater 64 can be turned on as needed to supplement the heat of the target space to prevent the internal temperature of the target space from dropping.

[0277] For example, for a heat pump system structure having only one indoor heat exchanger 31, during the defrosting process of the outdoor heat exchanger 32, the indoor heat exchanger 31 needs to circulate a low-temperature and low-pressure refrigerant to cooperate with the defrosting of the outdoor heat exchanger. At this time, the auxiliary heat exchanger 64 can be turned on to supplement the heat to the target space to prevent the internal temperature of the target space from dropping, while ensuring that the defrosting process can proceed normally.

[0278] It should also be noted that, in the examples of this application, see Figure 35 and Figure 36 As shown, the heat pump system may further include a constant pressure valve 66. For example, the constant pressure valve 66 may be disposed between the outlet of the compressor 1 and the inlet of each heat exchanger, for example, on the second common rail flow line 22, thereby maintaining the pressure within the heat pump system within a specified pressure range. However, it should be noted that the above is only one feasible arrangement for the constant pressure valve 66. In actual use, the constant pressure valve 66 may also be disposed in other locations, as long as the pressure within the heat pump system can be maintained within the specified pressure range. This is not a limitation in the embodiments of the present application.

[0279] In addition, in the examples of this application, see Figure 35 and Figure 36As shown, the heat pump system may further include a pressure regulating valve 65, which may be provided at the inlet of the compressor 1. Thus, by adjusting the pressure regulating valve 65, the inlet pressure of the compressor 1 may be reduced to a certain required outlet pressure, and the outlet pressure of the compressor 1 may be kept stable within a certain error range by relying on the energy of the refrigerant itself.

[0280] It should also be noted that, in the examples of this application, see Figure 35 and Figure 36 As shown, the heat pump system may further include a one-way valve 67. For example, the one-way valve 67 may be disposed between the outlet of the compressor 1 and the inlet of each heat exchanger, for example, on the second common rail flow line 22, to ensure that the refrigerant output by the compressor 1 does not flow back, thereby causing damage to the compressor 1.

[0281] It should be noted that the heat pump system can have all the above components such as the pressure regulating valve 65, the constant pressure valve 66, the one-way valve 67, the high-pressure tank 61, the low-pressure tank 62, the regenerator 63, and the auxiliary heat device 64. However, the heat pump system may also have only some of the above components, which is not limited in the embodiments of the present application.

[0282] It should also be noted that, in actual application, the compressor 1, the pressure regulating valve 65, the constant pressure valve 66, and the one-way valve 67 can be integrated in any combination, that is, the compressor 1 and the pressure regulating valve 65 can be integrated into one component, or the compressor 1 and the constant pressure valve 66 can be integrated into one component, or the compressor 1 and the one-way valve 67 can be integrated into one component, or the compressor 1, the pressure regulating valve 65 and the constant pressure valve 66 can be integrated into one component, or the compressor 1, the pressure regulating valve 65 and the one-way valve 67 can be integrated into one component, or the compressor 1, the pressure regulating valve 65 and the constant pressure valve 66 can be integrated into one component, or the compressor 1, the pressure regulating valve 65 and the one-way valve 67 can be integrated into one component, or the compressor 1, the pressure regulating valve 65 and the constant pressure valve 66 can be integrated into one component. The four are integrated into one component, or the pressure regulating valve 65 and the constant pressure valve 66 are integrated into one component, or the pressure regulating valve 65 and the one-way valve 67 are integrated into one component, or the pressure regulating valve 65, the constant pressure valve 66 and the one-way valve 67 are integrated into one component, or the constant pressure valve 66 and the one-way valve 67 are integrated into one component.

[0283] It should also be noted that, in actual application, the pressure regulating valve 65, the high-pressure tank 61, the low-pressure tank 62, and the regenerator 63 can also be integrated in any combination, which will not be repeated here.

[0284] It should also be noted that in the embodiment of the present application, when there are multiple indoor heat exchangers 31 or multiple outdoor heat exchangers 32, these multiple indoor heat exchangers 31 can be implemented using multiple conventional heat exchangers. In addition, an integrated heat exchanger can also be used as multiple indoor heat exchangers 31 or multiple outdoor heat exchangers 32, which is not limited in the embodiment of the present application.

[0285] In the heat pump system provided by the embodiments of the present application, whether in cooling mode or heating mode, the refrigerant output from the outlet of compressor 1 enters the inlet of one heat exchanger, passes through the first common rail flow line 21, flows into another heat exchanger, and returns to compressor 1 through the outlet of the other heat exchanger, completing the entire refrigerant cycle. Compared to existing heat pumps, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0286] In addition, the heat pump system provided in the embodiment of the present application can be adapted to the situation of one indoor heat exchanger 31 and one outdoor heat exchanger 32, or to the situation of one indoor heat exchanger 31 and multiple outdoor heat exchangers 32, or to the situation of multiple indoor heat exchangers 31 and one outdoor heat exchanger 32, or to the situation of multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32. Therefore, in actual application, users or engineers can easily adjust the number of heat exchangers according to actual needs, and the heat pump system has strong scalability.

[0287] At the same time, the heat pump system provided in the embodiment of the present application has a variety of operating modes and can be applied in different scenarios.

[0288] In addition, in the case of multiple outdoor heat exchangers 32, the heat pump system provided in the embodiment of the present application can achieve non-stop defrosting operation (that is, when a certain outdoor heat exchanger 32 is frosted, other outdoor heat exchangers 32 can be used to defrost the frosted outdoor heat exchanger 32, or other unfrosted outdoor heat exchangers 32 can be used to replace the role of the frosted outdoor heat exchanger 32, and cooperate with the indoor heat exchanger 31 to ensure that the system does not need to be shut down and can still work normally), thereby ensuring continuous heating.

[0289] In addition, for the heat pump system provided in the embodiment of the present application, when there are multiple indoor heat exchangers or outdoor heat exchangers, the heat pump system can realize the selection of some heat exchangers by controlling the switching device or the throttling device, realize the control of the number of heat exchangers into which the refrigerant flows, and realize the control of the amount of refrigerant flowing into the heat exchanger by the throttling hole of the throttling device or the valve assembly, thereby having a wider cooling or heating capacity adjustment range and a higher energy efficiency ratio.

[0290] Specifically, taking the case of having multiple indoor heat exchangers as an example, assuming that a conventional heat pump system uses an indoor heat exchanger with a standard load of 6 kW, and limited by the structural characteristics of the heat exchanger and the characteristics of the refrigerant used, assuming that the heat exchanger can achieve precise control of the output cooling or heating capacity when the required load is higher than one-third of the standard load (i.e., 2 kW), then in the heat pump system provided by the present application, multiple indoor heat exchangers with smaller standard loads are used to achieve this. At this time, under the same heat exchanger structure and the same refrigerant conditions, each indoor heat exchanger can also achieve precise control of the output cooling or heating capacity when the required load of each indoor heat exchanger is higher than one-third of its own standard load, thereby reducing the minimum load value that can be accurately controlled for the entire system, thereby having a wider cooling or heating capacity adjustment range. For example, in the above example, if two 3 kW indoor heat exchangers are used, the minimum load value that can be accurately controlled by each indoor heat exchanger becomes 1 kW, which is a full 1 kW reduction compared to the two kW in the conventional heat pump system.

[0291] Furthermore, under certain operating conditions, the heat exchanger can be operated at a load exceeding its standard load, enabling precise regulation of cooling or heating capacity exceeding 100%, with a wider adjustment range. For example, in the above example with two indoor heat exchangers, if one indoor heat exchanger is used for heating and the other for cooling, and assuming the outdoor heat exchanger is also cooling, the refrigerant flow rate input to the indoor heat exchanger operating for heating will exceed the standard load of that indoor heat exchanger, thereby achieving a regulation effect exceeding 100%. Similarly, a regulation effect exceeding 100% can also be achieved during cooling.

[0292] Similarly, the heat pump system of the embodiment of the present application also has similar effects as described above when it has multiple outdoor heat exchangers.

[0293] Through experimental testing, this application found that, taking the use of R134a automotive refrigerant in a heat pump system as an example, compared with traditional heat pump systems, the cooling or heating output of this heat pump system can be precisely adjusted within the range of 10% to 130%, while existing heat pump systems can only be adjusted within the range of 20% to 100%, with a wider adjustment range.

[0294] In addition, the heat pump system of the embodiment of the present application can control the number of heat exchangers circulating refrigerant in a high-temperature and high-pressure state and heat exchangers circulating throttled refrigerant within an adjustable range (for example, in the above example, assuming that the required load is 3 kilowatts, the traditional heat pump system controls the indoor heat exchanger to operate at 50% power, which will cause the refrigerant to be unbalanced in the heat exchanger, resulting in low energy efficiency. The heat pump system of the present application, assuming that two heat exchangers with a load of 3 kilowatts are used, can only operate one indoor heat exchanger, so that the indoor heat exchanger is in a high energy efficiency operating range), so that the heat pump system is always in a high energy efficiency operating range, significantly improving the system energy efficiency, which has great advantages in energy conservation and emission reduction.

[0295] Example 2:

[0296] See also Figures 37 to 44 As shown, this embodiment provides another heat pump system, including: a compressor 1, an indoor heat exchanger 31, an outdoor heat exchanger 32, and a common rail throttle pipe 24. The inlet of each heat exchanger is selectively connected to the outlet of the compressor 1 or the outlet of the common rail throttle pipe 24, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor 1 or the inlet of the common rail throttle pipe 24;

[0297] In cooling mode, the outlet of the compressor 1 is connected to the inlet of the outdoor heat exchanger 32, the outlet of the outdoor heat exchanger 32 is connected to the inlet of the common rail throttle pipe 24, the outlet of the common rail throttle pipe 24 is connected to the inlet of the indoor heat exchanger 31, and the outlet of the indoor heat exchanger 31 is connected to the inlet of the compressor 1;

[0298] In the heating mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31, the outlet of the indoor heat exchanger 31 is connected to the inlet of the common rail throttle pipe 24, the outlet of the common rail throttle pipe 24 is connected to the inlet of the outdoor heat exchanger 32, and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1.

[0299] It should be noted that the common rail throttling line 24 described in this embodiment refers to a line having a throttling function. For example, the common rail throttling line 24 can be a throttling device 40 or a channel provided with a throttling device 40.

[0300] It should be noted that, in this embodiment, the throttling device 40 can also be implemented by using an expansion throttle valve, an injection valve, a capillary tube, or other equipment.

[0301] Similar to the heat pump system described in Example 1, since the inlet of each heat exchanger selectively connects to the outlet of the common rail throttle line 24 or to the outlet of the compressor 1, that is, when the inlet of the heat exchanger needs to connect to the outlets of these two components, it can only connect in one of these two ways. Therefore, a device with a switching function is required between the inlet of each heat exchanger and the outlet of the common rail throttle line 24, and between the inlet of each heat exchanger and the outlet of the compressor 1 to meet the connection requirements of the heat exchanger inlet.

[0302] Similar to the heat pump system described in Example 1, in the embodiment of the present application, two independent devices with switching functions can be used between the inlet of each heat exchanger and the outlet of the common rail throttling line 24, and between the inlet of each heat exchanger and the outlet of the compressor 1, but the setting can also be implemented using an integrated valve.

[0303] Optional, see Figure 38 and Figure 41 As shown, Figure 38 and Figure 41 The heat pump system is implemented using two independent devices with switching functions. The heat pump system includes multiple fourth switch devices 44 and multiple fifth switch devices 45. Each of the fourth and fifth switch devices 44 and 45 corresponds to a heat exchanger. The inlet of each fourth switch device 44 is connected to the outlet of the compressor 1, and the outlet of each fourth switch device 44 is connected to the inlet of the corresponding heat exchanger. The inlet of each fifth switch device 45 is connected to the outlet of the common rail throttle line 24, and the outlet of each fifth switch device 45 is connected to the inlet of the corresponding heat exchanger.

[0304] In this way, when the heat pump system needs to operate in different modes, it is only necessary to control the fourth switch device 44 or the fifth switch device 45 of each heat exchanger to be turned on according to the requirements of the desired operating mode. For example, when operating in cooling mode, it is only necessary to turn on the fourth switch device 44 of the outdoor heat exchanger 32 and turn off the fifth switch device 45 of the outdoor heat exchanger 32, turn on the fifth switch device 45 of the indoor heat exchanger 31, and turn off the fourth switch device 44 of the indoor heat exchanger 31. When operating in heating mode, it is only necessary to turn on the fourth switch device 44 of the indoor heat exchanger 31 and turn off the fifth switch device 45 of the indoor heat exchanger 31, turn on the fifth switch device 45 of the outdoor heat exchanger 32, and turn off the fourth switch device 44 of the outdoor heat exchanger 32.

[0305] It should be understood that each fourth switch device 44 and fifth switch device 45 can be implemented by one or more switch structures such as a solenoid valve, a stop valve, a stop valve plus a one-way valve, etc., which is not limited in the embodiments of the present application.

[0306] Of course, the switching device provided between the inlet of each heat exchanger and the outlet of the common rail throttling line 24, and between the inlet of each heat exchanger and the outlet of the compressor 1 can also be implemented using a structure similar to the third valve assembly 48 or the fourth valve assembly 49 in Example 1.

[0307] Optionally, the heat pump system may include multiple fifth valve assemblies 71, with each fifth valve assembly 71 corresponding to a heat exchanger. Each fifth valve assembly 71 includes a valve body 711 and a valve core 712. The valve body 711 has a first inlet 7111, a second inlet 7112, and an outlet 7113. The valve core 712 is disposed within the valve body 711 and is used to control whether the outlet 7113 of the valve body 711 selectively communicates with the first inlet 7111 or the second inlet 7112. The first inlet of each fifth valve assembly 71 is connected to the outlet of the compressor 1, the second inlet 7112 of each fifth valve assembly 71 is connected to the outlet of the common rail throttle line 24, and the outlet of each fifth valve assembly 71 is connected to the inlet of the corresponding heat exchanger.

[0308] For example, the structure of the fifth valve assembly 71 can be seen in Figure 50A and Figure 50B As shown, the valve body 711 is provided with a first inlet 7111, a second inlet 7112 and an outlet 7113. The valve core 712 is movably disposed in the valve body 711 and has a first position and a second position.

[0309] When the valve core 712 is in the first position, Figure 50A As shown, the first inlet 7111 is connected to the outlet 7113, and the second inlet 7112 is separated from the outlet 7113 by the valve core 712. When the valve core 712 is in the second position, as shown in FIG. Figure 50B As shown, the second inlet 7112 is connected to the outlet 7113 , and the first inlet 7111 and the outlet 7113 are separated by the valve core 712 .

[0310] Optionally, the heat pump system may include multiple sixth valve assemblies 72, each corresponding to a heat exchanger. Each sixth valve assembly 72 includes a valve body 721 and a valve core 722. The valve body 721 has a first inlet 7211, a second inlet 7212, a first outlet 7213, and a second outlet 7214. The valve core 722 is disposed within the valve body 721 and is configured to selectively control the communication between the first inlet 7211 and the first outlet 7213, or between the second inlet 7212 and the second outlet 7214, of the valve body 721. The first inlet of each sixth valve assembly 72 is connected to the outlet of the compressor 1, the second inlet 7212 of each sixth valve assembly 72 is connected to the outlet of the common rail throttle line 24, and the first outlet 7213 and the second outlet 7214 of each sixth valve assembly 72 are connected to the inlet of the corresponding heat exchanger.

[0311] For example, the structure of the sixth valve assembly 72 can be seen in Figure 51A and Figure 51B As shown, the valve body 721 is provided with a first inlet 7211, a second inlet 7212, a first outlet 7213 and a second outlet 7214. The valve core 722 is movably disposed in the valve body 721 and has a first position and a second position.

[0312] When the valve core 722 is in the first position, Figure 51A As shown, the first inlet 7211 is connected to the first outlet 7213, and the second inlet 7212 is separated from the second outlet 7214 by the valve core 722. When the valve core 722 is in the second position, as shown in FIG. Figure 51B As shown, the second inlet 7212 is communicated with the second outlet 7214 , and the first inlet 7211 is separated from the first outlet 7213 by the valve core 722 .

[0313] Similarly, in this embodiment, two independent second switch devices 42 and third switch devices 43 can be used between the outlet of each heat exchanger and the inlet of the common rail throttling line 24, and between the outlet of each heat exchanger and the inlet of the compressor 1. However, the structure of the third valve assembly 48 or the structure of the fourth valve assembly 49 can also be used for implementation, which will not be repeated here.

[0314] Similar to the heat pump system described in Example 1, the heat pump system provided in this embodiment may also include a second common rail flow line 22, the outlet of the compressor 1 is connected to the inlet of the second common rail flow line 22, and the inlet of each heat exchanger is selectively connected to the outlet of the second common rail flow line 22 or to the outlet of the common rail throttling line 24.

[0315] Of course, in the embodiment, the inlet of each heat exchanger can also be connected to the outlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0316] Similar to the heat pump system described in Example 1, the heat pump system provided in this embodiment may also include a third common rail flow line 23. The outlet of each heat exchanger is selectively connected to the inlet of the third common rail flow line 23 or the inlet of the third common rail flow line 23. The inlet of the compressor 1 is connected to the outlet of the third common rail flow line 23.

[0317] Of course, in the embodiment of the present application, the outlet of each heat exchanger can also be connected to the inlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0318] Similarly, the heat pump system provided in this embodiment may also have only one indoor heat exchanger 31 and one outdoor heat exchanger 32. Furthermore, the heat pump system may also have multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32. Furthermore, the heat pump system may also have only one indoor heat exchanger 31 but multiple outdoor heat exchangers 32. Furthermore, the heat pump system may also have only one outdoor heat exchanger 32 but multiple indoor heat exchangers 31.

[0319] Similar to the heat pump system described in the first embodiment, in the heat pump system provided in this embodiment, when there are multiple outdoor heat exchangers 32 , more flexible defrost control can be achieved through the multiple outdoor heat exchangers 32 .

[0320] For example, in heating-defrost mode, the outlet of compressor 1 is connected to the inlet of indoor heat exchanger 31 and the inlet of a portion of outdoor heat exchanger 32. The outlets of the portion of outdoor heat exchanger 32 and the outlets of the indoor heat exchanger 31 are connected to the inlet of common rail throttle line 24. The outlet of common rail throttle line 24 is connected to the inlet of another portion of outdoor heat exchanger 32, and the outlet of the other portion of outdoor heat exchanger 32 is connected to the inlet of compressor 1. In this way, part of the high-temperature, high-pressure refrigerant output from compressor 1 enters indoor heat exchanger 31 for heating, while another part enters the portion of outdoor heat exchanger 32 for heat release and defrosting. The other portion of outdoor heat exchanger 32 receives the low-temperature, low-pressure refrigerant throttled by common rail throttle line 24, absorbs heat, and then outputs it to compressor 1, completing the entire refrigerant cycle.

[0321] Similarly, in the heating defrost mode, the identities of the outdoor heat exchanger 32 for heating defrost and the outdoor heat exchanger 32 for absorbing heat in cooperation with the indoor heat exchanger 31 can be designated.

[0322] Furthermore, in the heating-defrost mode, it is not necessary to pre-set an outdoor heat exchanger 32 specifically for cooperating with the indoor heat exchanger 31 for indoor heating, and an outdoor heat exchanger 32 specifically for defrosting. Instead, when heating the room, all or some of the outdoor heat exchangers 32 can be selected to cooperate with the indoor heat exchanger 31 for indoor heating according to the setting method. When one or more outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the mode is switched to the heating-defrost mode, and some of the high-temperature and high-pressure refrigerant is input into the frosted outdoor heat exchanger 32 for defrosting. At this time, the unfrosted outdoor heat exchanger 32 is used to continue to cooperate with the indoor heat exchanger 31 for indoor heating.

[0323] For another example, in the natural defrost mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31, the outlet of the indoor heat exchanger 31 is connected to the inlet of the common rail throttle pipe 24, the outlet of the common rail throttle pipe 24 is connected to the inlet of the unfrosted outdoor heat exchanger 32, and the outlet of the unfrosted outdoor heat exchanger 32 is connected to the inlet of the compressor 1; and the outlet of the compressor 1 is disconnected from the inlet of the frosted outdoor heat exchanger 32, and the outlet of the common rail throttle pipe 24 is also disconnected from the inlet of the frosted outdoor heat exchanger 32.

[0324] In this case, similar to the previous example, it is not necessary to pre-define an outdoor heat exchanger 32 specifically for use with the indoor heat exchanger 31 for indoor heating. Instead, when heating the room, all or some of the outdoor heat exchangers 32 can be selected to work with the indoor heat exchanger 31 for indoor heating according to the set method. When one or more outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the system switches to natural defrost mode, disconnecting all refrigerant-accessible channels of the frosted outdoor heat exchanger 32, allowing it to defrost naturally. At this time, the unfrosted outdoor heat exchangers 32 continue to work with the indoor heat exchanger 31 for indoor heating.

[0325] Similar to the heat pump system provided in the first embodiment, the heat pump system provided in this embodiment, when having multiple indoor heat exchangers 31 , can achieve more flexible indoor dehumidification control through the multiple indoor heat exchangers 31 .

[0326] For example, in the dehumidification mode, the outlet of the compressor 1 is connected to the inlet of part of the indoor heat exchanger 31, the outlet of part of the indoor heat exchanger 31 is connected to the inlet of the common rail throttle pipe 24, the outlet of the common rail throttle pipe 24 is connected to the inlet of another part of the indoor heat exchanger 31, and the outlet of the other part of the indoor heat exchanger 31 is connected to the inlet of the compressor 1.

[0327] At this time, a feasible indoor dehumidification method is to disconnect the passage between the outlet of the common rail throttling pipe 24 and the inlet of the outdoor heat exchanger 32, and at the same time disconnect the passage between the outlet of the compressor 1 and the inlet of the outdoor heat exchanger 32, so as to form a refrigerant circulation loop while realizing indoor dehumidification by relying only on each indoor heat exchanger 31.

[0328] Another feasible indoor dehumidification method is: in the heating and dehumidification mode, the outlet of the common rail throttle pipe 24 is also connected to the inlet of the outdoor heat exchanger 32 in a throttled manner, and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1. In this way, the outdoor heat exchanger 32 is used to absorb heat in conjunction with the indoor heat exchanger 31, thereby diverting some of the medium-temperature and high-pressure refrigerant to the outside, thereby improving the indoor heating effect.

[0329] Another feasible indoor dehumidification method is to connect the outlet of compressor 1 to the inlet of outdoor heat exchanger 32 in defrost and dehumidification mode. The outlet of outdoor heat exchanger 32 is connected to the inlet of common rail throttle pipe 24, and the outlet of common rail throttle pipe 24 is connected to the inlet of another indoor heat exchanger 31 in a throttled manner. In this way, outdoor heat exchanger 32 is connected to high-temperature, high-pressure refrigerant, achieving both indoor dehumidification and outdoor defrosting.

[0330] It should be noted that in the embodiment of the present application, when dehumidification is performed, the indoor heat exchanger 31 close to the upstream side of the air flow can be set for cooling, and the indoor heat exchanger 31 close to the downstream side of the air flow can be set for heating to obtain a better dehumidification effect, but this is not a limitation.

[0331] Similar to the heat pump system provided in Example 1, when the heat pump system provided in this embodiment has multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32, in addition to realizing the above-mentioned mode, another defrosting and dehumidification mode can also be realized through the cooperation of multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32.

[0332] That is, the outlet of the compressor 1 can be respectively connected to the inlet of part of the indoor heat exchanger 31 and the inlet of part of the outdoor heat exchanger 32, the outlets of part of the indoor heat exchanger 31 and part of the outdoor heat exchanger 32 are connected to the inlet of the common rail throttling pipe 24, the outlet of the common rail throttling pipe 24 is connected to the inlet of another part of the indoor heat exchanger 31 and another part of the outdoor heat exchanger 32, and the outlets of another part of the indoor heat exchanger 31 and another part of the outdoor heat exchanger 32 are connected to the inlet of the compressor 1.

[0333] In this way, heating and dehumidification can be performed by cooperating with the indoor heat exchanger 31 through a part of the outdoor heat exchanger 32, while defrosting can be achieved by using another part of the outdoor heat exchanger 32.

[0334] Similar to the heat pump system provided in the first embodiment, the heat pump system provided in this embodiment may further include one or more components such as a high-pressure tank 61, a low-pressure tank 62, a regenerator 63, an auxiliary heat device 64, a constant pressure valve 66, a pressure regulating valve 65, and a one-way valve 67. The functions and effects of the relevant components in the heat pump system can be found in the description of the first embodiment and will not be repeated here.

[0335] When the high-pressure tank 61 is provided, the high-pressure tank 61 may be provided on the common rail throttle line 24 or on the second common rail throughflow line 22 .

[0336] When the low-pressure tank 62 is provided, the low-pressure tank 62 may be arranged on the third common rail throughflow line 23 .

[0337] When the regenerator 63 is provided, the regenerator 63 may be arranged on the third common rail throughflow line 23 .

[0338] When the auxiliary heat device 64 is provided, the auxiliary heat device 64 and the indoor heat exchanger 31 may be disposed in the same space.

[0339] When a constant pressure valve 66 is provided, the constant pressure valve 66 may be provided between the outlet of the compressor 1 and the inlet of each heat exchanger, for example, on the second common rail flow line 22 .

[0340] When the pressure regulating valve 65 is provided, the pressure regulating valve 65 may be arranged between the inlet of the compressor 1 and the outlet of each heat exchanger, for example, on the third common rail flow line 23 .

[0341] When a one-way valve 67 is provided, the one-way valve 67 may be provided between the outlet of the compressor 1 and the inlet of each heat exchanger, for example, on the second common rail flow line 22 .

[0342] Similarly, in actual application, the compressor 1, the pressure regulating valve 65, the constant pressure valve 66, and the one-way valve 67 can be integrated in any combination; the pressure regulating valve 65, the high-pressure tank 61, the low-pressure tank 62, and the regenerator 63 can also be integrated in any combination, which will not be repeated here.

[0343] It should be understood that the difference between the heat pump system provided in this embodiment and the heat pump system provided in Example 1 is that the refrigerant in a medium-temperature and high-pressure state output from the outlet of the heat exchanger in the heat pump system in this embodiment is throttled on the common rail throttling line 24, and then the control of whether the throttled refrigerant is allowed to enter the corresponding heat exchanger is achieved through the structure of the fifth switch device 45 or the third valve assembly 48 or the fourth valve assembly 49. The structure of other parts, as well as the mode functions that can be achieved and the control required in different modes are basically consistent with the heat pump system provided in Example 1. Therefore, the heat pump system provided in the embodiment of the present application can achieve all the functions of the heat pump system provided in Example 1.

[0344] In addition, in the embodiment of the present application, a throttling device 40 may be provided at the outlet of each heat exchanger, thereby connecting the first common rail flow line 21 and the outlet of each heat exchanger through the throttling device 40, thereby throttling the refrigerant at the outlet of each heat exchanger, and then transmitting the throttled refrigerant to the desired heat exchanger through the first common rail flow line 21. In this case, the structure of the other parts of the heat pump system, the mode functions that can be achieved, and the control required in different modes are basically consistent with the heat pump system provided in Example 2.

[0345] In the heat pump system provided by the embodiments of the present application, whether in cooling mode or heating mode, the refrigerant output from the outlet of compressor 1 enters the inlet of one heat exchanger, passes through the first common rail flow line 21, flows into another heat exchanger, and returns to compressor 1 through the outlet of the other heat exchanger, completing the entire refrigerant cycle. Compared to existing heat pumps, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0346] In addition, the heat pump system provided in the embodiment of the present application can be adapted to the situation of one indoor heat exchanger 31 and one outdoor heat exchanger 32, or to the situation of one indoor heat exchanger 31 and multiple outdoor heat exchangers 32, or to the situation of multiple indoor heat exchangers 31 and one outdoor heat exchanger 32, or to the situation of multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32. Therefore, in actual application, users or engineers can easily adjust the number of heat exchangers according to actual needs, and the heat pump system has strong scalability.

[0347] At the same time, the heat pump system provided in the embodiment of the present application has a variety of operating modes and can be applied in different scenarios.

[0348] In addition, in the case of multiple outdoor heat exchangers 32, the heat pump system provided in the embodiment of the present application can achieve non-stop defrosting operation (that is, when a certain outdoor heat exchanger 32 is frosted, other outdoor heat exchangers 32 can be used to defrost the frosted outdoor heat exchanger 32, or other unfrosted outdoor heat exchangers 32 can be used to replace the role of the frosted outdoor heat exchanger 32, and cooperate with the indoor heat exchanger 31 to ensure that the system does not need to be shut down and can still work normally), thereby ensuring continuous heating.

[0349] In addition, for the heat pump system provided in the embodiment of the present application, the heat pump system can realize the selection of some heat exchangers and the control of the number of heat exchangers into which the refrigerant flows by controlling the switching device or the throttling device, and can realize the control of the amount of refrigerant flowing into the heat exchanger by the throttling device, thereby having a wider cooling or heating capacity adjustment range and a higher energy efficiency ratio.

[0350] Example 3:

[0351] See also Figures 4 to 45 As shown, the heat pump system provided in this embodiment includes a compressor 1, an indoor heat exchanger 31 and an outdoor heat exchanger 32, the inlet of each heat exchanger is selectively connected to the outlet of the compressor 1 or connected to the outlet throttling of other heat exchangers, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor 1 or connected to the inlet throttling of other heat exchangers.

[0352] In cooling mode, the outlet of the compressor 1 is connected to the inlet of the outdoor heat exchanger 32 , the outlet of the outdoor heat exchanger 32 is connected to the inlet throttling of the indoor heat exchanger 31 , and the outlet of the indoor heat exchanger 31 is connected to the inlet of the compressor 1 .

[0353] In the heating mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31 , the outlet of the indoor heat exchanger 31 is connected to the inlet throttling of the outdoor heat exchanger 32 , and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1 .

[0354] It should be noted that, in this embodiment, the inlet and outlet of each heat exchanger may be connected via a common rail, such as shown in the first and second embodiments, using the first common rail flow line 21 or the common rail throttling line 24 for connection.

[0355] In addition, the inlet and outlet of each heat exchanger can also be connected by independent pipes, such as Figure 45 As shown, it is not limited in the embodiments of this application.

[0356] In addition, in this embodiment, similar to the heat pump systems described in Examples 1 and 2, the heat pump system provided in this embodiment may also include a second common rail flow line 22, the outlet of the compressor 1 is connected to the inlet of the second common rail flow line 22, and the inlet of each heat exchanger is selectively connected to the outlet of the second common rail flow line 22 or to the outlet of the common rail throttling line 24.

[0357] Of course, in the embodiment, the inlet of each heat exchanger can also be connected to the outlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0358] Similar to the heat pump systems described in Examples 1 and 2, the heat pump system provided in this embodiment may also include a third common rail flow line 23. The outlet of each heat exchanger is selectively connected to the inlet of the third common rail flow line 23 or to the inlet of the third common rail flow line 23. The inlet of the compressor 1 is connected to the outlet of the third common rail flow line 23.

[0359] Of course, in the embodiment of the present application, the outlet of each heat exchanger can also be connected to the inlet of the compressor 1 through different pipelines, which is not limited in the embodiment of the present application.

[0360] It should be noted that, in this embodiment, regardless of whether a common rail is used between the heat exchangers or between the heat exchangers and the compressor 1, the inlet of each heat exchanger is selectively connected to the outlet of the compressor 1 or is throttled to the outlet of other heat exchangers, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor 1 or is throttled to the inlet of other heat exchangers.

[0361] Then, at this time, as shown in Example 1, a first switching device 41 and a throttling device 40 can be set at the inlet of the heat exchanger, or a first valve assembly 46 or a second valve assembly 47 can be set, and a second switching device 42 and a third switching device 43 can be set at the outlet of the heat exchanger, or a third valve assembly 48 or a fourth valve assembly 49 can be used.

[0362] In addition, as shown in the second embodiment, a fourth switch device 44 and a fifth switch device 45 may be provided at the inlet of the heat exchanger, or a third valve assembly 48 or a fourth valve assembly 49 may be provided, and a throttling device 40 may be provided in the pipeline before the fourth switch device 44 and the fifth switch device 45, or the third valve assembly 48 or the fourth valve assembly 49, and a second switch device 42 and a third switch device 43 may be provided at the outlet of the heat exchanger, or a third valve assembly 48 or a fourth valve assembly 49 may be used.

[0363] In addition, as shown in the second embodiment, a fourth switch device 44 and a fifth switch device 45 are set at the inlet of the heat exchanger, or a third valve assembly 48 or a fourth valve assembly 49 is set at the inlet of the heat exchanger, and a throttling device 40 is set at the outlet of the heat exchanger, or a first valve assembly 46 or a second valve assembly 47 is set.

[0364] It should be understood that the heat pump system provided in this embodiment may also have only one indoor heat exchanger 31 and one outdoor heat exchanger 32. Furthermore, the heat pump system may also have multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32. Furthermore, the heat pump system may also have only one indoor heat exchanger 31 but multiple outdoor heat exchangers 32. Furthermore, the heat pump system may also have only one outdoor heat exchanger 32 but multiple indoor heat exchangers 31.

[0365] Similar to the heat pump systems described in the first and second embodiments, in the heat pump system provided in this embodiment, when multiple outdoor heat exchangers 32 are provided, more flexible defrosting control can be achieved through the multiple outdoor heat exchangers 32 .

[0366] For example, in the heating and defrosting mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31 and part of the inlet of the outdoor heat exchanger 32 respectively, the outlet of part of the outdoor heat exchanger 32 and the outlet of the indoor heat exchanger 31 are throttledly connected to the inlet of another part of the outdoor heat exchanger 32, and the outlet of the other part of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1.

[0367] Similarly, in the heating defrost mode, the identities of the outdoor heat exchanger 32 for heating defrost and the outdoor heat exchanger 32 for absorbing heat in cooperation with the indoor heat exchanger 31 can be designated.

[0368] Furthermore, in the heating-defrost mode, it is not necessary to pre-set an outdoor heat exchanger 32 specifically for cooperating with the indoor heat exchanger 31 for indoor heating, and an outdoor heat exchanger 32 specifically for defrosting. Instead, when heating the room, all or some of the outdoor heat exchangers 32 can be selected to cooperate with the indoor heat exchanger 31 for indoor heating according to the setting method. When one or more outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the mode is switched to the heating-defrost mode, and some of the high-temperature and high-pressure refrigerant is input into the frosted outdoor heat exchanger 32 for defrosting. At this time, the unfrosted outdoor heat exchanger 32 is used to continue to cooperate with the indoor heat exchanger 31 for indoor heating.

[0369] For another example, in the natural defrost mode, the outlet of the compressor 1 is connected to the inlet of the indoor heat exchanger 31, the outlet of the indoor heat exchanger 31 is throttledly connected to the inlet of the unfrosted outdoor heat exchanger 32, and the outlet of the unfrosted outdoor heat exchanger 32 is connected to the inlet of the compressor 1; and the outlet of the compressor 1 is disconnected from the inlet of the frosted outdoor heat exchanger 32, and the outlet of the indoor heat exchanger 31 and the unfrosted outdoor heat exchanger 32 are also disconnected from the inlet of the frosted outdoor heat exchanger 32.

[0370] In this case, similar to the previous example, it is not necessary to pre-define an outdoor heat exchanger 32 specifically for use with the indoor heat exchanger 31 for indoor heating. Instead, when heating the room, all or some of the outdoor heat exchangers 32 can be selected to work with the indoor heat exchanger 31 for indoor heating according to the set method. When one or more outdoor heat exchangers 32 are frosted due to environmental factors and the action of the refrigerant, the system switches to natural defrost mode, disconnecting all refrigerant-accessible channels of the frosted outdoor heat exchanger 32, allowing it to defrost naturally. At this time, the unfrosted outdoor heat exchangers 32 continue to work with the indoor heat exchanger 31 for indoor heating.

[0371] Similar to the heat pump systems provided in the first and second embodiments, the heat pump system provided in this embodiment, when having multiple indoor heat exchangers 31 , can achieve more flexible indoor dehumidification control through the multiple indoor heat exchangers 31 .

[0372] For example, in the dehumidification mode, the outlet of the compressor 1 is connected to the inlet of part of the indoor heat exchanger 31, the outlet of part of the indoor heat exchanger 31 is connected to the inlet throttling of another part of the indoor heat exchanger 31, and the outlet of the other part of the indoor heat exchanger 31 is connected to the inlet of the compressor 1.

[0373] At this time, a feasible indoor dehumidification method is to disconnect the passage between the outlet of the indoor heat exchanger 31 and the inlet of the outdoor heat exchanger 32, and at the same time disconnect the passage between the outlet of the compressor 1 and the inlet of the outdoor heat exchanger 32, so as to form a refrigerant circulation loop while achieving indoor dehumidification by relying only on each indoor heat exchanger 31.

[0374] Another feasible indoor dehumidification method is: in the heating and dehumidification mode, the outlet of part of the indoor heat exchanger 31 is throttledly connected to the inlet of the outdoor heat exchanger 32, and the outlet of the outdoor heat exchanger 32 is connected to the inlet of the compressor 1.

[0375] In addition, another feasible indoor dehumidification method is: in the defrost and dehumidification mode, the outlet of the compressor 1 is also connected to the inlet of the outdoor heat exchanger 32, and the outlet of the outdoor heat exchanger 32 is throttledly connected to the inlet of another part of the indoor heat exchanger 31.

[0376] It should be noted that in the embodiment of the present application, when dehumidification is performed, the indoor heat exchanger 31 close to the upstream side of the air flow can be set for cooling, and the indoor heat exchanger 31 close to the downstream side of the air flow can be set for heating to obtain a better dehumidification effect, but this is not a limitation.

[0377] Similar to the heat pump systems provided in Examples 1 and 2, when the heat pump system provided in this embodiment has multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32, in addition to realizing the above-mentioned mode, another defrosting and dehumidification mode can also be realized through the cooperation of multiple indoor heat exchangers 31 and multiple outdoor heat exchangers 32.

[0378] That is, the outlet of the compressor 1 is connected to the inlet of part of the indoor heat exchanger 31 and the inlet of part of the outdoor heat exchanger 32 respectively, the outlets of part of the indoor heat exchanger 31 and part of the outdoor heat exchanger 32 are throttledly connected to the inlet of another part of the indoor heat exchanger 31 and another part of the outdoor heat exchanger 32, and the outlets of another part of the indoor heat exchanger 31 and another part of the outdoor heat exchanger 32 are connected to the inlet of the compressor 1.

[0379] Similar to the heat pump systems provided in Examples 1 and 2, the heat pump system provided in this embodiment may further include one or more components such as a high-pressure tank 61, a low-pressure tank 62, a regenerator 63, an auxiliary heat exchanger 64, a constant pressure valve 66, a pressure regulating valve 65, and a one-way valve 67. The functions and locations of the relevant components in the heat pump system can be found in the descriptions of Examples 1 and 2 and will not be repeated here.

[0380] In the heat pump system provided by the embodiments of the present application, whether in cooling mode or heating mode, the refrigerant output from the outlet of compressor 1 enters the inlet of one heat exchanger, passes through the first common rail flow line 21, flows into another heat exchanger, and returns to compressor 1 through the outlet of the other heat exchanger, completing the entire refrigerant cycle. Compared to existing heat pumps, the refrigerant flow direction in the heat exchanger does not change when switching operating modes, thereby reducing the design requirements for the heat exchanger in the heat pump system and reducing costs.

[0381] In addition, for the heat pump system provided in the embodiment of the present application, when there are multiple indoor heat exchangers or outdoor heat exchangers, the heat pump system can realize the selection of some heat exchangers by controlling the switching device or the throttling device, and realize the control of the number of heat exchangers into which the refrigerant flows, and can realize the control of the amount of refrigerant flowing into the heat exchanger by the throttling hole of the throttling device or the valve assembly, so that it can have a wider cooling or heating capacity adjustment range and a higher energy efficiency ratio, so that the heat pump system is always in a high energy efficiency ratio operating range, significantly improving the system energy efficiency ratio, and having great advantages in energy conservation and emission reduction.

[0382] Example 4:

[0383] Based on Examples 1 to 3, this embodiment provides a vehicle, which is equipped with a heat pump system. The implementation structure of the heat pump system can adopt the structure of any heat pump system described in Examples 1 to 3, so it will not be repeated here.

[0384] It should be noted that the means of transportation provided in this embodiment may be vehicles, ships, airplanes and other means of transportation, but this is not a limitation.

[0385] It should also be noted that the vehicles, ships, trains, and airplanes described in this embodiment can be conventionally powered vehicles, ships, trains, and airplanes, or they can be powered by new energy sources, and this is not limited in the embodiments of this application.

[0386] In addition, based on Examples 1 to 3, this embodiment also provides an air conditioner, which is equipped with a heat pump system, and the implementation structure of the heat pump system can also adopt the structure of any heat pump system described in Examples 1 to 3, which will not be repeated here.

[0387] It should be noted that the air conditioner described in this embodiment can be a household air conditioning system or a commercial air conditioning system, and this is not limited in the embodiments of the present application.

[0388] It should be understood that the heat pump systems provided in Examples 1 to 3 of the present application can be applied to other scenarios or products in addition to vehicles and air conditioners. In the embodiments of the present application, there is no limitation on the application scenarios of the heat pump systems.

[0389] In the embodiments provided in this application, it should be understood that the system embodiments described above are merely illustrative.

[0390] In addition, the components described as separate components may or may not be physically separate. During implementation, some or all of the components described in the embodiment of the present application may be selected according to actual needs to achieve the purpose of the embodiment.

[0391] In this document, relational terms such as first and second, etc. are used merely to distinguish one entity or operation from another entity or operation, but do not necessarily require or imply any actual relationship or order between these entities or operations.

[0392] As used herein, a plurality refers to two or more than two.

[0393] The above description is merely an embodiment of the present application and is not intended to limit the scope of protection of the present application. For those skilled in the art, various modifications and variations of the present application are possible. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the scope of protection of the present application.

Claims

1. A heat pump system, characterized in that: The system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a first common rail flow pipeline, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or to the outlet throttle of the first common rail flow pipeline, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or to the inlet of the first common rail flow pipeline; In cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first common rail flow pipe, the outlet of the first common rail flow pipe is connected to the inlet throttling of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; In the heating mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is connected to the inlet throttling of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

2. The heat pump system according to claim 1, characterized in that The number of the indoor heat exchanger is one, and the number of the outdoor heat exchanger is multiple.

3. The heat pump system according to claim 1, characterized in that There are multiple indoor heat exchangers and one outdoor heat exchanger.

4. The heat pump system according to claim 1, characterized in that There are multiple indoor heat exchangers and multiple outdoor heat exchangers.

5. The heat pump system according to claim 2 or 4, characterized in that: In the heating and defrosting mode, the outlet of the compressor is respectively connected to the inlet of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlet of part of the outdoor heat exchanger and the outlet of the indoor heat exchanger are connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the outdoor heat exchanger, and the outlet of the other part of the outdoor heat exchanger is connected to the inlet of the compressor.

6. The heat pump system according to claim 2 or 4, characterized in that: In the natural defrost mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the first common rail flow pipe, the outlet of the first common rail flow pipe is connected to the inlet throttling of the unfrosted outdoor heat exchanger, and the outlet of the unfrosted outdoor heat exchanger is connected to the inlet of the compressor; and the outlet of the compressor is disconnected from the inlet of the frosted outdoor heat exchanger, and the outlet of the first common rail flow pipe is also disconnected from the inlet of the frosted outdoor heat exchanger.

7. The heat pump system according to claim 3 or 4, characterized in that: In the dehumidification mode, the outlet of the compressor is connected to the inlet of part of the indoor heat exchanger, the outlet of the part of the indoor heat exchanger is connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the indoor heat exchanger, and the outlet of the other part of the indoor heat exchanger is connected to the inlet of the compressor.

8. The heat pump system according to claim 7, characterized in that The dehumidification mode includes a heating and dehumidification mode. In the heating and dehumidification mode, the outlet of the first common rail flow pipeline is also connected to the inlet throttling of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

9. The heat pump system according to claim 7, characterized in that The dehumidification mode includes a defrost and dehumidification mode. In the defrost and dehumidification mode, the outlet of the compressor is also connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the first common rail flow pipeline, and the outlet of the first common rail flow pipeline is connected to the inlet throttling of the other part of the indoor heat exchanger.

10. The heat pump system according to claim 4, characterized in that In the defrost and dehumidification mode, the outlet of the compressor is respectively connected to the inlet of part of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlets of part of the indoor heat exchanger and part of the outdoor heat exchanger are connected to the inlet of the first common rail flow pipeline, the outlet of the first common rail flow pipeline is throttledly connected to the inlet of another part of the indoor heat exchanger and another part of the outdoor heat exchanger, and the outlets of the other part of the indoor heat exchanger and the other part of the outdoor heat exchanger are connected to the inlet of the compressor.

11. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a plurality of first switch devices and a plurality of throttling devices; The first switch device, the throttling device and the heat exchanger correspond one to one; The inlet of each first switch device is connected to the outlet of the compressor, and the outlet of each first switch device is connected to the inlet of the corresponding heat exchanger; The inlet of each throttling device is communicated with the outlet of the first common rail flow pipeline, and the outlet of each throttling device is communicated with the inlet of the corresponding heat exchanger.

12. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a plurality of first valve assemblies, each of the first valve assemblies corresponding to the heat exchanger, each of the first valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, and an outlet, the valve core being disposed within the valve body, and the valve core being used to control the outlet of the valve body to selectively communicate with the first inlet or with the second inlet through a throttle hole; The first inlet of each first valve assembly is communicated with the outlet of the compressor, the second inlet of each first valve assembly is communicated with the outlet of the first common rail flow line, and the outlet of each first valve assembly is communicated with the inlet of the corresponding heat exchanger.

13. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a plurality of second valve assemblies, each of the second valve assemblies corresponding to the heat exchanger, each of the second valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being disposed within the valve body, and configured to selectively control the first inlet of the valve body to communicate with the first outlet, or the second inlet to communicate with the second outlet via a throttle hole; The first inlet of each second valve assembly is communicated with the outlet of the compressor, the second inlet of each second valve assembly is communicated with the outlet of the first common rail flow line, and the first outlet and second outlet of each second valve assembly are communicated with the inlet of the corresponding heat exchanger.

14. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a plurality of second switch devices and a plurality of third switch devices; The second switch device, the third switch device and the heat exchanger correspond one to one; The inlet of each second switching device is connected to the outlet of the corresponding heat exchanger, and the outlet of each second switching device is connected to the inlet of the first common rail flow line; The inlet of each third switching device is communicated with the outlet of the corresponding heat exchanger, and the outlet of each third switching device is communicated with the inlet of the compressor.

15. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a second common rail flow pipeline; The outlet of the compressor is in communication with the inlet of the second common rail flow line; The inlet of each heat exchanger selectively communicates with the outlet of the second common rail flow line or the outlet of the first common rail flow line.

16. The heat pump system according to claim 15, characterized in that The heat pump system further includes a high-pressure tank; The high-pressure tank is arranged on the second common rail flow pipeline.

17. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a high-pressure tank; The high-pressure tank is arranged on the first common rail flow pipeline.

18. The heat pump system according to any one of claims 1 to 10, characterized in that: The heat pump system further includes a third common rail flow pipeline; The outlet of each heat exchanger is selectively connected to the inlet of the third common rail flow line or the inlet of the first common rail flow line; The inlet of the compressor is communicated with the outlet of the third common rail flow line.

19. The heat pump system according to claim 18, characterized in that The heat pump system further includes a low-pressure tank; The low-pressure tank is arranged on the third common rail flow pipeline.

20. The heat pump system according to claim 18, wherein The heat pump system further includes a regenerator; The regenerator is provided on the first common rail flow pipeline and the third common rail flow pipeline to realize heat exchange between the first common rail flow pipeline and the third common rail flow pipeline.

21. A heat pump system, characterized in that: The heat exchanger comprises a compressor, an indoor heat exchanger and an outdoor heat exchanger, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or to the outlet throttled connection of another heat exchanger except the heat exchanger, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or to the inlet throttled connection of another heat exchanger except the heat exchanger; In cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet throttling of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; In heating mode, the outlet of the compressor is communicated with the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is communicated with the inlet throttling of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is communicated with the inlet of the compressor.

22. The heat pump system according to claim 21, characterized in that The number of the indoor heat exchanger is one, and the number of the outdoor heat exchanger is multiple.

23. The heat pump system according to claim 21, characterized in that There are multiple indoor heat exchangers and one outdoor heat exchanger.

24. The heat pump system according to claim 21, wherein There are multiple indoor heat exchangers and multiple outdoor heat exchangers.

25. The heat pump system according to claim 22 or 24, characterized in that: In the heating and defrosting mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger and part of the inlet of the outdoor heat exchanger respectively, the outlet of part of the outdoor heat exchanger and the outlet of the indoor heat exchanger are connected to the inlet throttling of another part of the outdoor heat exchanger, and the outlet of the other part of the outdoor heat exchanger is connected to the inlet of the compressor.

26. The heat pump system according to claim 22 or 24, characterized in that: In the natural defrost mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is throttledly connected to the inlet of the unfrosted outdoor heat exchanger, and the outlet of the unfrosted outdoor heat exchanger is connected to the inlet of the compressor; and the outlet of the compressor is disconnected from the inlet of the frosted outdoor heat exchanger, and the outlet of the indoor heat exchanger and the unfrosted outdoor heat exchanger are also disconnected from the inlet of the frosted outdoor heat exchanger.

27. The heat pump system according to claim 23 or 24, characterized in that: In the dehumidification mode, the outlet of the compressor is connected to the inlet of a part of the indoor heat exchanger, the outlet of the part of the indoor heat exchanger is connected to the inlet throttling of another part of the indoor heat exchanger, and the outlet of the other part of the indoor heat exchanger is connected to the inlet of the compressor.

28. The heat pump system according to claim 27, characterized in that The dehumidification mode includes a heating and dehumidification mode. In the heating and dehumidification mode, the outlets of some indoor heat exchangers are connected to the inlet of the outdoor heat exchanger in a throttling manner, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

29. The heat pump system according to claim 27, wherein: The dehumidification mode includes a defrost and dehumidification mode. In the defrost and dehumidification mode, the outlet of the compressor is further connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the other part of the indoor heat exchanger in a throttling manner.

30. The heat pump system according to claim 24, wherein In the defrost and dehumidification mode, the outlet of the compressor is connected to the inlet of part of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger respectively, the outlets of part of the indoor heat exchanger and part of the outdoor heat exchanger are throttledly connected to the inlet of another part of the indoor heat exchanger and another part of the outdoor heat exchanger, and the outlets of another part of the indoor heat exchanger and another part of the outdoor heat exchanger are connected to the inlet of the compressor.

31. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a plurality of first switch devices and a plurality of throttling devices; The first switch device, the throttling device and the heat exchanger correspond one to one; The inlet of each first switch device is connected to the outlet of the compressor, and the outlet of each first switch device is connected to the inlet of the corresponding heat exchanger; The outlet of each throttling device is communicated with the inlet of the corresponding heat exchanger, and the inlet of each throttling device is communicated with the outlets of other heat exchangers except the corresponding heat exchanger.

32. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a plurality of first valve assemblies, each of the first valve assemblies corresponding to the heat exchanger, each of the first valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, and an outlet, the valve core being disposed within the valve body, and the valve core being used to control the outlet of the valve body to selectively communicate with the first inlet or with the second inlet through a throttle hole; The outlet of each first valve assembly is communicated with the inlet of the corresponding heat exchanger, the first inlet of each first valve assembly is communicated with the outlet of the compressor, and the second inlet of each first valve assembly is communicated with the outlet of other heat exchangers except the corresponding heat exchanger.

33. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a plurality of second valve assemblies, each of the second valve assemblies corresponding to the heat exchanger, each of the second valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being disposed within the valve body, and configured to selectively control the first inlet of the valve body to communicate with the first outlet, or the second inlet to communicate with the second outlet via a throttle hole; The first outlet and the second outlet of each second valve assembly are communicated with the inlet of the corresponding heat exchanger, the first inlet of each second valve assembly is communicated with the outlet of the compressor, and the second inlet of each second valve assembly is communicated with the outlet of other heat exchangers except the corresponding heat exchanger.

34. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a plurality of second switch devices and a plurality of third switch devices; The second switch device, the third switch device and the heat exchanger correspond one to one; The inlet of each second switch device is connected to the outlet of the corresponding heat exchanger, and the outlet of each second switch device is connected to the inlet of other heat exchangers except the corresponding heat exchanger; The inlet of each third switching device is communicated with the outlet of the corresponding heat exchanger, and the outlet of each third switching device is communicated with the inlet of the compressor.

35. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a high-pressure tank; The high-pressure tank is connected between the outlet of the compressor and the inlet of the heat exchanger.

36. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a high-pressure tank; The high-pressure tank is connected between the outlet of each heat exchanger and the inlet of other heat exchangers.

37. The heat pump system according to any one of claims 21 to 30, characterized in that: The heat pump system further includes a low-pressure tank; The low-pressure tank is connected between the inlet of the compressor and the outlet of the heat exchanger.

38. A heat pump system, characterized in that: The system comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger and a common rail throttling line, wherein the inlet of each heat exchanger is selectively connected to the outlet of the compressor or the outlet of the common rail throttling line, and the outlet of each heat exchanger is selectively connected to the inlet of the compressor or the inlet of the common rail throttling line; In cooling mode, the outlet of the compressor is connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the common rail throttle pipe, the outlet of the common rail throttle pipe is connected to the inlet of the indoor heat exchanger, and the outlet of the indoor heat exchanger is connected to the inlet of the compressor; In the heating mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the common rail throttling pipe, the outlet of the common rail throttling pipe is connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

39. The heat pump system according to claim 38, characterized in that The number of the indoor heat exchanger is one, and the number of the outdoor heat exchanger is multiple.

40. The heat pump system according to claim 38, wherein There are multiple indoor heat exchangers and one outdoor heat exchanger.

41. The heat pump system according to claim 38, wherein There are multiple indoor heat exchangers and multiple outdoor heat exchangers.

42. The heat pump system according to claim 39 or 41, characterized in that In the heating and defrosting mode, the outlet of the compressor is respectively connected to the inlet of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlet of part of the outdoor heat exchanger and the outlet of the indoor heat exchanger are connected to the inlet of the common rail throttling pipe, the outlet of the common rail throttling pipe is connected to the inlet of another part of the outdoor heat exchanger, and the outlet of the other part of the outdoor heat exchanger is connected to the inlet of the compressor.

43. The heat pump system according to claim 39 or 41, characterized in that In the natural defrost mode, the outlet of the compressor is connected to the inlet of the indoor heat exchanger, the outlet of the indoor heat exchanger is connected to the inlet of the common rail throttling pipe, the outlet of the common rail throttling pipe is connected to the inlet of the unfrosted outdoor heat exchanger, and the outlet of the unfrosted outdoor heat exchanger is connected to the inlet of the compressor; and the outlet of the compressor is disconnected from the inlet of the frosted outdoor heat exchanger, and the outlet of the common rail throttling pipe is also disconnected from the inlet of the frosted outdoor heat exchanger.

44. The heat pump system according to claim 40 or 41, characterized in that In the dehumidification mode, the outlet of the compressor is connected to the inlet of part of the indoor heat exchanger, the outlet of part of the indoor heat exchanger is connected to the inlet of the common rail throttling pipe, the outlet of the common rail throttling pipe is connected to the inlet of another part of the indoor heat exchanger, and the outlet of the other part of the indoor heat exchanger is connected to the inlet of the compressor.

45. The heat pump system according to claim 44, characterized in that The dehumidification mode includes a heating and dehumidification mode. In the heating and dehumidification mode, the outlet of the common rail throttling pipe is also connected to the inlet of the outdoor heat exchanger, and the outlet of the outdoor heat exchanger is connected to the inlet of the compressor.

46. ​​The heat pump system according to claim 44, characterized in that The dehumidification mode includes a defrost and dehumidification mode. In the defrost and dehumidification mode, the outlet of the compressor is also connected to the inlet of the outdoor heat exchanger, the outlet of the outdoor heat exchanger is connected to the inlet of the common rail throttling pipe, and the outlet of the common rail throttling pipe is connected to the inlet of the other part of the indoor heat exchanger.

47. The heat pump system according to claim 41, characterized in that In the defrost and dehumidification mode, the outlet of the compressor is respectively connected to the inlet of part of the indoor heat exchanger and the inlet of part of the outdoor heat exchanger, the outlets of part of the indoor heat exchanger and part of the outdoor heat exchanger are connected to the inlet of the common rail throttling pipe, the outlet of the common rail throttling pipe is connected to the inlet of another part of the indoor heat exchanger and another part of the outdoor heat exchanger, and the outlets of another part of the indoor heat exchanger and another part of the outdoor heat exchanger are connected to the inlet of the compressor.

48. The heat pump system according to any one of claims 38 to 47, characterized in that The heat pump system further includes a plurality of second switch devices and a plurality of third switch devices; The second switch device, the third switch device and the heat exchanger correspond one to one; The inlet of each second switch device is communicated with the outlet of the corresponding heat exchanger, and the outlet of each second switch device is communicated with the inlet of the common rail throttling pipeline; The inlet of each third switching device is communicated with the outlet of the corresponding heat exchanger, and the outlet of each third switching device is communicated with the inlet of the compressor.

49. The heat pump system according to any one of claims 38 to 47, characterized in that The heat pump system also includes multiple fourth switch devices and multiple fifth switch devices, and the fourth switch devices, the fifth switch devices and the heat exchangers correspond one to one. The inlet of each fourth switch device is connected to the outlet of the compressor, and the outlet of each fourth switch device is connected to the inlet of the corresponding heat exchanger. The inlet of each fifth switch device is connected to the outlet of the common rail throttling line, and the outlet of each fifth switch device is connected to the inlet of the corresponding heat exchanger.

50. The heat pump system according to any one of claims 38 to 47, characterized in that The heat pump system further includes a plurality of fifth valve assemblies, each of the fifth valve assemblies corresponding to the heat exchanger, each of the fifth valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, and an outlet, the valve core being disposed within the valve body, and configured to control the outlet of the valve body to selectively communicate with the first inlet or the second inlet; The first inlet of each fifth valve assembly is communicated with the outlet of the compressor, the second inlet of each fifth valve assembly is communicated with the outlet of the common rail throttle line, and the outlet of each fifth valve assembly is communicated with the inlet of the corresponding heat exchanger.

51. The heat pump system according to any one of claims 38 to 47, characterized in that: The heat pump system further includes a plurality of sixth valve assemblies, each of the sixth valve assemblies corresponding to the heat exchanger one by one, each of the sixth valve assemblies including a valve body and a valve core, the valve body having a first inlet, a second inlet, a first outlet, and a second outlet, the valve core being disposed within the valve body, and configured to selectively control the first inlet of the valve body to communicate with the first outlet, or the second inlet to communicate with the second outlet; The first inlet of each sixth valve assembly is communicated with the outlet of the compressor, the second inlet of each sixth valve assembly is communicated with the outlet of the common rail throttle line, and the first outlet and second outlet of each sixth valve assembly are communicated with the inlet of the corresponding heat exchanger.

52. The heat pump system according to any one of claims 38 to 47, characterized in that: The heat pump system further includes a second common rail flow pipeline; The outlet of the compressor is in communication with the inlet of the second common rail flow line; The inlet of each heat exchanger is selectively connected to the outlet of the second common rail flow line or the outlet of the common rail throttling line.

53. The heat pump system according to claim 52, characterized in that The heat pump system further includes a high-pressure tank; The high-pressure tank is arranged on the second common rail flow pipeline.

54. The heat pump system according to any one of claims 38 to 47, characterized in that The heat pump system further includes a high-pressure tank; The high-pressure tank is arranged on the common rail throttling pipeline.

55. The heat pump system according to any one of claims 38 to 47, characterized in that The heat pump system further includes a third common rail flow pipeline; The outlet of each heat exchanger is selectively connected to the inlet of the third common rail flow line or the inlet of the first common rail flow line; The inlet of the compressor is communicated with the outlet of the third common rail flow line.

56. The heat pump system according to claim 55, characterized in that The heat pump system further includes a low-pressure tank; The low-pressure tank is arranged on the third common rail flow pipeline.

57. The heat pump system according to claim 55, characterized in that The heat pump system further includes a regenerator; The regenerator is provided on the common rail throttling pipeline and the third common rail flow pipeline to realize heat exchange between the common rail throttling pipeline and the third common rail flow pipeline.

58. A means of transport, characterized in that: The vehicle comprises the heat pump system according to any one of claims 1-57.

59. The heat pump system according to claim 58, characterized in that The transportation vehicle is a vehicle.

60. An air conditioner, characterized in that: The air conditioner comprises a heat pump system according to any one of claims 1 to 57.

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