A heat pump system

Abstract

The application discloses a heat pump system, which comprises a control device, a first heat exchanger, a second heat exchanger, a regenerator, a gas-liquid separator, a compressor, a cold supply mechanism, a heat supply mechanism, a heat exchange mechanism, a first switch valve, a second switch valve, a third switch valve and a fourth switch valve. One end of the compressor is connected with an input end of the first heat exchanger and the heat exchange mechanism through the first switch valve and the second switch valve respectively. The other end of the first heat exchanger is connected with an input end of the regenerator. An output end of the regenerator is connected with an input end of the second heat exchanger and the heat exchange mechanism through the third switch valve and the fourth switch valve respectively. An output end of the heat exchange mechanism is connected with an input end of the compressor through the gas-liquid separator and the regenerator. The heat supply mechanism is connected with the first heat exchanger, and the cold supply mechanism is connected with the second heat exchanger. The heat pump system has the advantages that heat can be supplied to the cold supply mechanism while heat is supplied to the heat supply mechanism, and the system has high flexibility.

Description

Technical Field

[0001] This invention relates to the field of heating, ventilation and air conditioning technology, and particularly to a heat pump system. Background Technology

[0002] Traditional heat pump systems have the following problems during operation:

[0003] 1. After supplying hot water or heating, the cold energy absorbed from water, rooms, or other materials or spaces is directly discharged outdoors through heat exchangers such as fins; or after supplying cold water or cooling, the heat absorbed from water, rooms, or other materials or spaces is directly discharged outdoors through heat exchangers such as fins; thus, this results in the waste of this portion of cold or heat energy, i.e., there is a problem of unreasonable energy recovery and energy waste.

[0004] Second, it cannot supply both cold and heat sources simultaneously, resulting in low flexibility in use.

[0005] Third, heat pump systems have problems such as harmful overheating and significant throttling losses during operation. Furthermore, even if the return gas of a traditional heat pump is separated by a gas-liquid separator, the refrigerant entering the compressor may still contain liquid droplets, which reduces the safety and stability of the compressor during operation.

[0006] It is evident that existing technologies still need improvement and enhancement. Summary of the Invention

[0007] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a heat pump system that can supply heat to a heating mechanism and cool to a cooling mechanism at the same time, which has the advantage of high flexibility of use.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A heat pump system includes a control device, a first heat exchanger, a second heat exchanger, a regenerator, a gas-liquid separator, and a compressor, a cooling mechanism, a heating mechanism, a heat exchange mechanism, a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve, all electrically connected to the control device. One end of the compressor is connected to the input end of the first heat exchanger via the first switching valve and to the heat exchange mechanism via the second switching valve. The other end of the first heat exchanger is connected to the input end of the regenerator. The output end of the regenerator is connected to the input end of the second heat exchanger via the third switching valve and to the heat exchange mechanism via the fourth switching valve. The output end of the heat exchange mechanism is connected to the input end of the gas-liquid separator or to the input end of the regenerator. The output end of the gas-liquid separator is connected to the input end of the compressor via the regenerator. The heating mechanism is connected to the first heat exchanger, and the cooling mechanism is connected to the second heat exchanger.

[0010] The heat pump system further includes a first filter, a second filter, and a first check valve and an expansion valve electrically connected to the control device. The output end of the regenerator, the first filter, the expansion valve, and the second filter are connected in sequence. The output end of the second filter is connected to the third switch valve and the fourth switch valve, respectively.

[0011] In the heat pump system, the heat exchange mechanism includes a third heat exchanger and a fan, a fifth switching valve, a sixth switching valve, a seventh switching valve, and a four-way valve, all electrically connected to the control device. The second heat exchanger is connected to port one of the four-way valve via the fifth switching valve. The third heat exchanger is connected to ports two and three of the four-way valve. Port four of the four-way valve is connected to the sixth and seventh switching valves. The output of the sixth switching valve is connected to the gas-liquid separator, and the output of the seventh switching valve is connected to the input of the regenerator. The third heat exchanger is located on the air outlet side of the fan. The compressor is connected to the input of the third heat exchanger via the second switching valve, and the regenerator is connected to the input of the third heat exchanger via the fourth switching valve.

[0012] In the heat pump system described above, the heat exchange mechanism further includes a second one-way valve electrically connected to the control device. Port two of the four-way valve is connected to the input end of the third heat exchanger through the second one-way valve, and the output end of the third heat exchanger is connected to port three of the four-way valve.

[0013] In the heat pump system described above, the heat exchange mechanism further includes a condition detection element electrically connected to the control device. The condition detection element is located at the output end of the second heat exchanger and is used to detect the operating condition of the refrigerant output by the second heat exchanger.

[0014] In the heat pump system described above, the cooling mechanism includes a fourth heat exchanger, a cold water storage tank, and an eighth switching valve, a ninth switching valve, a tenth switching valve, a third check valve, and a first delivery pump, all electrically connected to the control device. The input end of the eighth switching valve is used to connect to an external water source. The output end of the eighth switching valve and the output end of the fourth heat exchanger are respectively connected to the input end of the fourth heat exchanger through the first delivery pump. The output end of the fourth heat exchanger is connected to the input end of the cold water storage tank through the ninth switching valve and to the input end of the fourth heat exchanger through the tenth switching valve. The third check valve is located at the output end of the fourth heat exchanger.

[0015] In the heat pump system, the cooling mechanism further includes a first expansion tank, a first exhaust valve, and a first flow switch, which are electrically connected to the control device. The first expansion tank, the first exhaust valve, and the first flow switch are disposed on the connecting pipeline between the eighth switch valve and the first delivery pump.

[0016] In the heat pump system, the heating mechanism includes a fifth heat exchanger, a hot water storage tank, and an eleventh switching valve, a twelfth switching valve, a thirteenth switching valve, a fourth check valve, and a second delivery pump, all electrically connected to the control device. The input end of the eleventh switching valve is used to connect to an external water source. The output end of the eleventh switching valve and the output end of the fifth heat exchanger are respectively connected to the input end of the fifth heat exchanger through the second delivery pump. The output end of the fifth heat exchanger is connected to the input end of the hot water storage tank through the twelfth switching valve, and is also connected to the input end of the fifth heat exchanger through the twelfth switching valve. The fourth check valve is located at the output end of the fifth heat exchanger.

[0017] In the heat pump system, the heating mechanism further includes a second expansion tank, a second vent valve, and a second flow switch, which are electrically connected to the control device. The second expansion tank, the second vent valve, and the second flow switch are disposed on the connecting pipeline between the eleventh switch valve and the second delivery pump.

[0018] Beneficial effects:

[0019] This invention provides a heat pump system that, by adjusting the conduction relationship of the first, second, third, and fourth switching valves, enables the separate execution of cooling mode, the separate execution of heating mode, and the simultaneous execution of cooling and heating modes. This improves the flexibility of the heat pump system during operation, effectively recovers the cold energy after heating and the heat energy after cooling, avoids energy waste, and reduces the operating energy consumption of the heat pump system. Attached Figure Description

[0020] Figure 1 The system structure diagram of the heat pump system provided by the present invention;

[0021] Figure 2 A system structure diagram of the heat pump system provided by the present invention when simultaneously executing cooling mode and heating mode;

[0022] Figure 3 This invention provides a system structure diagram of the heat pump system in heating mode.

[0023] Figure 4 The system structure diagram of the heat pump system provided by the present invention when executing the cooling mode.

[0024] Key component symbols: 1-First heat exchanger, 2-Second heat exchanger, 3-Regenerator, 4-Gas-liquid separator, 5-Compressor, 601-Fourth heat exchanger, 602-Cold water storage tank, 603-Eighth switching valve, 604-Ninth switching valve, 605-Tenth switching valve, 606-Third check valve, 607-First transfer pump, 608-First expansion tank, 609-First exhaust valve, 610-First flow switch, 701-Fifth heat exchanger, 702-Hot water storage tank, 703-Eleventh switching valve, 704-Twelfth switching valve, 705-Thirteenth switching valve, 706-Fourth... 707-Second transfer pump, 708-Second expansion tank, 709-Second exhaust valve, 710-Second flow switch, 81-Fan, 82-Fifth switch valve, 83-Sixth switch valve, 84-Seventh switch valve, 85-Four-way valve, 86-Third heat exchanger, 87-Second check valve, 901-First switch valve, 902-Second switch valve, 903-Third switch valve, 904-Fourth switch valve, 905-First filter, 906-Second filter, 907-First check valve, 908-Expansion valve, 909-Fourteenth switch valve, 910-Fifteenth switch valve. Detailed Implementation

[0025] This invention provides a heat pump system. To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0026] In the description of this invention, it should be understood that the terms "installation" and "connection" should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Please see Figures 1 to 4This invention provides a heat pump system, including a control device, a first heat exchanger 1, a second heat exchanger 2, a regenerator 3, a gas-liquid separator 4, and a compressor 5, a cooling mechanism, a heating mechanism, a heat exchange mechanism, a first switching valve 901, a second switching valve 902, a third switching valve 903, and a fourth switching valve 904, all electrically connected to the control device. One end of the compressor 5 is connected to the input end of the first heat exchanger 1 via the first switching valve 901, and to the heat exchange mechanism via the second switching valve 902. The first heat exchanger 1... The other end is connected to the input end of the regenerator 3. The output end of the regenerator 3 is connected to the input end of the second heat exchanger 2 through the third switching valve 903, and to the heat exchange mechanism through the fourth switching valve 904. The output end of the heat exchange mechanism is connected to the input end of the gas-liquid separator 4 or to the input end of the regenerator 3. The output end of the gas-liquid separator 4 is connected to the input end of the compressor 5 through the regenerator 3. The heating mechanism is connected to the first heat exchanger 1, and the cooling mechanism is connected to the second heat exchanger 2.

[0028] This application discloses a heat pump system. By adjusting the conduction relationship of the first switching valve 901, the second switching valve 902, the third switching valve 903, and the fourth switching valve 904, it is possible to achieve separate execution of the cooling mode, separate execution of the heating mode, and simultaneous execution of the cooling and heating modes. This improves the flexibility of the heat pump system during operation, effectively recovers the cold energy after heating and the heat energy after cooling, avoids energy waste, and reduces the operating energy consumption of the heat pump system. Furthermore, a regenerator 3 is provided at the input end of the compressor 5 to avoid harmful overheating, and a heat exchange mechanism is provided to ensure effective heat exchange of the refrigerant, prevent the refrigerant from carrying liquid droplets after separation by the gas-liquid separator 4, and ensure sufficient conversion between the gas and liquid phases of the refrigerant, reducing refrigerant loss and improving the stability and safety of the compressor 5 during operation.

[0029] In this embodiment, when both cooling and heating modes are executed simultaneously, the control device controls the opening of the first switching valve 901 and the third switching valve 903, and controls the closing of the second switching valve 902 and the fourth switching valve 904. The high-temperature and high-pressure refrigerant gas discharged from the compressor 5 enters the first heat exchanger 1 through the first switching valve 901. After heat exchange, the refrigerant becomes a low-temperature and high-pressure refrigerant liquid. After passing through the regenerator 3 and exchanging heat with the return gas, it enters the second heat exchanger 2 for further heat exchange. The second heat exchanger 2 outputs refrigerant gas. Based on the heat exchange status of the refrigerant gas, it is determined whether to enter the heat exchange mechanism for further heat exchange to avoid the problem of entrainment of liquid droplets. The fully heat-exchanged refrigerant gas returns to the gas-liquid separator 4, and after harmful overheating is recovered through the regenerator 3, it returns to the air inlet of the compressor 5. The first heat exchanger 1 exchanges heat with the heating mechanism to achieve heating, and the second heat exchanger 2 exchanges heat with the cooling mechanism to achieve cooling.

[0030] In this embodiment, when the heating mode is executed alone, the control device controls the first switching valve 901 and the fourth switching valve 904 to open, and controls the second switching valve 902 and the third switching valve 903 to close. The high-temperature and high-pressure refrigerant liquid output by the compressor 5 enters the first heat exchanger 1 through the first switching valve 901 for heat exchange, becoming a low-temperature and high-pressure refrigerant liquid. It then enters the regenerator 3 to exchange heat with the return gas, and then enters the heat exchange mechanism through the fourth switching valve 904 for heat exchange, ensuring that the refrigerant is fully heat-exchanged and becomes gas. The refrigerant gas after heat exchange returns to the gas-liquid separator 4, and after harmful superheat recovery through the regenerator 3, it returns to the air inlet of the compressor 5 to realize the heating cycle. The first heat exchanger 1 exchanges heat with the heating mechanism to realize heating.

[0031] In this embodiment, when the cooling mode is executed alone, the control device controls the second switching valve 902 and the third switching valve 903 to open, and controls the first switching valve 901 and the fourth switching valve 904 to close. The high-temperature and high-pressure refrigerant output by the compressor 5 enters the heat exchange mechanism through the second switching valve 902 for heat exchange. After heat exchange, the refrigerant liquid exchanges heat with the return gas in the regenerator 3 and is then output to the second heat exchanger 2. The second heat exchanger 2 outputs refrigerant gas to the gas-liquid separator 4 for gas-liquid separation. After harmful superheat recovery through the regenerator 3, it returns to the air inlet of the compressor 5 to realize the cooling cycle. The second heat exchanger 2 exchanges heat with the cooling mechanism to realize cooling.

[0032] Further, please refer to Figures 1 to 4 The heat pump system further includes a first filter 905, a second filter 906, and a first one-way valve 907 and an expansion valve 908 electrically connected to the control device. The output end of the regenerator 3, the first filter 905, the expansion valve 908, and the second filter 906 are connected in sequence. The output end of the second filter 906 is connected to the third switching valve 903 and the fourth switching valve 904, respectively.

[0033] In this embodiment, the refrigerant liquid output from the regenerator 3 passes through the first one-way valve 907 and the first filter 905, and then undergoes throttling in the expansion valve 908. After throttling, the refrigerant liquid becomes a low-temperature, low-pressure refrigerant gas-liquid two-phase mixture, and then enters the second heat exchanger 2 through the second filter 906 for heat exchange. The first one-way valve 907 ensures that the refrigerant flows in a single direction, avoiding backflow and improving the stability and safety of the heat pump system during operation. The first filter 905 and the second filter 906 can filter out any impurities that the refrigerant may carry, avoiding pipe blockage, reducing refrigerant loss, and further improving the stability and reliability of the heat pump system during operation.

[0034] Further, please refer to Figures 1 to 4 The heat exchange mechanism includes a third heat exchanger 86 and a fan 81, a fifth switching valve 82, a sixth switching valve 83, a seventh switching valve 84, and a four-way valve 85, all electrically connected to the control device. The second heat exchanger 2 is connected to port one of the four-way valve 85 via the fifth switching valve 82. The third heat exchanger 86 is connected to ports two and three of the four-way valve 85. Port four of the four-way valve 85 is connected to the sixth switching valve 83 and the seventh switching valve 84. The output end of the sixth switching valve 83 is connected to the gas-liquid separator 4, and the output end of the seventh switching valve 84 is connected to the input end of the regenerator 3. The third heat exchanger 86 is located on the air outlet side of the fan 81. The compressor 5 is connected to the input end of the third heat exchanger 86 via the second switching valve 902, and the regenerator 3 is connected to the input end of the third heat exchanger 86 via the fourth switching valve 904.

[0035] In this embodiment, when both cooling and heating modes are executed simultaneously, the control device controls the fifth switching valve 82 and the sixth switching valve 83 to open, and controls the seventh switching valve 84 to close. The second heat exchanger 2 delivers refrigerant gas to the four-way valve 85 through the fifth switching valve 82. The control device determines whether heat exchange is sufficient based on the operating condition of the refrigerant output from the second heat exchanger 2. If heat exchange is sufficient, the control device de-energizes the four-way valve 85, and the refrigerant gas enters the gas-liquid separator 4 through the sixth switching valve 83. If heat exchange is insufficient, the control device controls... When the four-way valve 85 is energized, the refrigerant enters the third heat exchanger 86 for secondary heat exchange and then returns to the gas-liquid separator 4 through the fifth switch valve 82. When the heating mode is executed alone, the control device controls the fifth switch valve 82 and the seventh switch valve 84 to close, and only controls the sixth switch valve 83 to open. When the cooling mode is executed alone, the control device controls the fifth switch valve 82 and the sixth switch valve 83 to close, and only controls the seventh switch valve 84 to open. The refrigerant liquid output from the third heat exchanger 86 enters the regenerator 3 through the seventh switch valve 84 to exchange heat with the return gas.

[0036] Further, please refer to Figures 1 to 4 The heat exchange mechanism further includes a second one-way valve 87 electrically connected to the control device. Port 2 of the four-way valve 85 is connected to the input end of the third heat exchanger 86 through the second one-way valve 87, and the output end of the third heat exchanger 86 is connected to port 3 of the four-way valve 85.

[0037] In this embodiment, a second one-way valve 87 is provided to ensure that the refrigerant gas output from the compressor 5 or the refrigerant gas output from the second heat exchanger 2 flows only to the second heat exchanger 2, thereby improving the stability and reliability of the heat pump system during operation.

[0038] Further, please refer to Figures 1 to 4The heat exchange mechanism further includes operating condition detection components that are electrically connected to the control device. The operating condition detection components are disposed at the output end of the second heat exchanger 2 and are used to detect the operating condition of the refrigerant output by the second heat exchanger 2.

[0039] In this embodiment, the operating condition detection device can be a temperature sensor for detecting the temperature of the refrigerant output from the second heat exchanger 2, or a pressure sensor for detecting the pressure of the refrigerant output from the second heat exchanger 2, or a combination thereof. By detecting the operating condition of the refrigerant output from the second heat exchanger 2 through the operating condition detection device, it can be determined whether the refrigerant has undergone sufficient heat exchange in the second heat exchanger 2, so as to adjust the energizing state of the four-way valve 85 and the opening and closing states of the fifth switching valve 82 and the sixth switching valve 83, thereby realizing the adjustment of the refrigerant delivery route.

[0040] Further, please refer to Figure 1 and Figure 4 The cooling mechanism includes a fourth heat exchanger 601, a cold water storage tank 602, and an eighth switching valve 603, a ninth switching valve 604, a tenth switching valve 605, a third check valve 606, and a first delivery pump 607, all electrically connected to the control device. The input end of the eighth switching valve 603 is used to connect to an external water source. The output end of the eighth switching valve 603 and the output end of the fourth heat exchanger 601 are respectively connected to the input end of the fourth heat exchanger 601 through the first delivery pump 607. The output end of the fourth heat exchanger 601 is connected to the input end of the cold water storage tank 602 through the ninth switching valve 604 and to the input end of the fourth heat exchanger 601 through the tenth switching valve 605. The third check valve 606 is located at the output end of the fourth heat exchanger 601.

[0041] In this embodiment, when the cooling mode is executed, the control device first controls the opening of the eighth switch valve 603, the ninth switch valve 604, and the tenth switch valve 605. External water from the storage tank or household tap water enters the heat pump system through the eighth switch valve 603. Under the action of the third one-way valve 606 and the first delivery pump 607, it enters the second heat exchanger 2 for heat exchange. After heat exchange, the water becomes a low-temperature liquid, and then enters the cold water storage tank 602 through the ninth switch valve 604, and then enters the cold water storage tank 602 through the tenth switch valve 605. When the amount of cold water in the cold water storage tank 602 is sufficient, the ninth switch valve 604 is closed, or when the amount of cold water in the fourth heat exchanger 601 is sufficient, the tenth switch valve 605 is closed. When the amount of cold water in the hot water storage tank 702 or the amount of cold water in the fourth heat exchanger 601 is sufficient, the eighth switch valve 603 is closed. When the amount of cold water or cold water is insufficient, the eighth switch valve 603 is opened, and the corresponding ninth switch valve 604 or tenth switch valve 605 is opened.

[0042] Further, please refer to Figure 1 and Figure 4 The cooling mechanism further includes a first expansion tank 608, a first exhaust valve 609, and a first water flow switch 610, which are electrically connected to the control device respectively. The first expansion tank 608, the first exhaust valve 609, and the first water flow switch 610 are disposed on the connecting pipeline between the eighth switch valve 603 and the first delivery pump 607.

[0043] In this embodiment, a first expansion tank 608 is provided. The control device can determine whether venting is required based on the water volume or pressure in the pipeline. When venting is required, the first expansion tank 608 is opened, and the first venting valve 609 is opened to assist in venting, thereby improving the stability and safety of the heat pump system during operation. A first water flow switch 610 is provided. When the eighth switch valve 603 is opened, the first water flow switch 610 is opened simultaneously to monitor the water flow of the refrigeration mechanism, further improving the stability of the heat pump system during safe operation.

[0044] Further, please refer to Figure 1 and Figure 3 The heating mechanism includes a fifth heat exchanger 701, a hot water storage tank 702, and an eleventh switching valve 703, a twelfth switching valve 704, a thirteenth switching valve 705, a fourth check valve 706, and a second delivery pump 707, all electrically connected to the control device. The input end of the eleventh switching valve 703 is used to connect to an external water source. The output end of the eleventh switching valve 703 and the output end of the fifth heat exchanger 701 are respectively connected to the input end of the fifth heat exchanger 701 through the second delivery pump 707. The output end of the fifth heat exchanger 701 is connected to the input end of the hot water storage tank 702 through the twelfth switching valve 704, and is also connected to the input end of the fifth heat exchanger 701 through the twelfth switching valve 704. The fourth check valve 706 is located at the output end of the fifth heat exchanger 701.

[0045] In this embodiment, when the heating mode is executed, the control device first controls the opening of the eleventh switch valve 703, the twelfth switch valve 704, and the thirteenth switch valve 705. External water source, either from the water storage tank or domestic tap water, enters the heat pump system through the eleventh switch valve 703. Under the action of the fourth one-way valve 706 and the second transfer pump 707, it enters the first heat exchanger 1 for heat exchange. After heat exchange, the water source becomes a high-temperature liquid, and then enters the hot water storage tank 702 through the twelfth switch valve 704, and then enters the heat pump system through the thirteenth switch valve 705. When the amount of hot water stored in the hot water storage tank 702 is sufficient, the twelfth switch valve 704 is closed, or when the amount of hot water exchanged in the fifth heat exchanger 701 is sufficient, the thirteenth switch valve 705 is closed. When the amount of hot water stored in the hot water storage tank 702 or the amount of hot water exchanged in the fifth heat exchanger 701 is sufficient, the eleventh switch valve 703 is closed. When the amount of hot water stored or the amount of hot water exchanged is insufficient, the eleventh switch valve 703 is opened, and the corresponding twelfth switch valve 704 or thirteenth switch valve 705 is opened.

[0046] Further, please refer to Figure 1 and Figure 3 The heating mechanism further includes a second expansion tank 708, a second exhaust valve 709, and a second flow switch 710, which are electrically connected to the control device respectively. The second expansion tank 708, the second exhaust valve 709, and the second flow switch 710 are disposed on the connecting pipeline between the eleventh switch valve 703 and the second delivery pump 707.

[0047] In this embodiment, a second expansion tank 708 is provided. The control device can determine whether venting is required based on the water volume or pressure in the pipeline. When venting is required, the second expansion tank 708 is opened, and the second vent valve 709 is opened to assist in venting, thereby improving the stability and safety of the heat pump system during operation. A second water flow switch 710 is provided. When the eleventh switch valve 703 is opened, the second water flow switch 710 is opened simultaneously to monitor the water flow of the heating mechanism, further improving the stability of the heat pump system during safe operation.

[0048] In this embodiment, please refer to Figure 1 The heat pump system also includes a fourteenth switching valve 909 and a fifteenth switching valve 910. The refrigerant liquid output from the first heat exchanger 1 is input into the regenerator 3 through the fourteenth switching valve 909, and the refrigerant gas output from the second heat exchanger 2 is input into the gas-liquid separator 4 through the fifteenth switching valve 910.

[0049] In this embodiment, all the switching valves mentioned are solenoid valves.

[0050] For the heat pump system disclosed in this application, please refer to [link / reference needed] during actual operation. Figure 2When both cooling and heating modes are executed simultaneously, the control device controls the opening of the first switching valve 901, the third switching valve 903, the fourteenth switching valve 909, the fifth switching valve 82, the sixth switching valve 83, the cooling mechanism, and the heating mechanism, and controls the closing of the remaining switching valves. The high-temperature, high-pressure refrigerant gas discharged from the compressor 5 enters the first heat exchanger 1 through the first switching valve 901. After heat exchange, the refrigerant becomes a low-temperature, high-pressure refrigerant liquid. After heat exchange with the return gas in the regenerator 3, it is throttled by the expansion valve 908. The throttled refrigerant becomes a low-temperature, low-pressure refrigerant gas-liquid two-phase mixture, and then enters the second heat exchanger 2 for heat exchange. The second heat exchanger 2 outputs refrigerant gas. The control device determines whether the refrigerant gas should enter the heat exchange mechanism for further heat exchange based on the heat exchange status to avoid the problem of entrained droplets. When the refrigerant gas heat exchange is insufficient, i.e. When the refrigerant system carries liquid, the control device energizes the four-way valve 85, and the refrigerant enters the third heat exchanger 86 through the fifth switch valve 82 for secondary heat exchange. After heat exchange, the refrigerant becomes refrigerant gas and is fed back to the gas-liquid separator 4 through the sixth switch valve 83. When the refrigerant has fully exchanged heat, that is, when the refrigerant gas does not carry liquid, the fully heat-exchanged refrigerant gas returns to the gas-liquid separator 4 through the fifth switch valve 82, the four-way valve 85, and the sixth switch valve 83. After harmful superheat recovery through the regenerator 3, it returns to the air inlet of the compressor 5. The high-temperature and high-pressure refrigerant liquid entering the first heat exchanger 1 exchanges heat with the external water source and then enters the fifth heat exchanger 701 and the hot water storage tank 702 respectively to achieve heating. The refrigerant entering the second heat exchanger 2 exchanges heat with the external water source and then enters the fourth heat exchanger 601 and the cold water storage tank 602 respectively to achieve cooling.

[0051] In actual work, please refer to Figure 3 When the heating mode is executed alone, the control device controls the opening of the first switching valve 901, the fourth switching valve 904, the fourteenth switching valve 909, and the sixth switching valve 83, as well as the heating mechanism, and controls the closing of the remaining switching valves and the cooling mechanism. The high-temperature and high-pressure refrigerant liquid output from the compressor 5 enters the first heat exchanger 1 through the first switching valve 901 for heat exchange, becoming a low-temperature and high-pressure refrigerant liquid. Then, it enters the regenerator 3 through the fourteenth switching valve 909 to exchange heat with the return gas. After that, it is throttled by the expansion valve 908. The throttled refrigerant... The refrigerant is transformed into a low-temperature, low-pressure gas-liquid two-phase mixture, which then enters the third heat exchanger 86 through the fourth switch valve 904 for heat exchange, ensuring that the refrigerant is fully heat-exchanged and turns into a gas. The heat-exchanged refrigerant gas returns to the gas-liquid separator 4 through the low-pass valve and the sixth switch valve 83, and then returns to the compressor 5 inlet after harmful superheat recovery through the regenerator 3, thus realizing the heating cycle. The high-temperature, high-pressure refrigerant liquid that enters the first heat exchanger 1 exchanges heat with the external water source and then enters the fifth heat exchanger 701 and the hot water storage tank 702 respectively to achieve heating.

[0052] In this embodiment, when the cooling mode is executed alone, the control device controls the second switching valve 902, the third switching valve 903, the fifteenth switching valve 910, and the seventh switching valve 84, as well as the cooling mechanism, to open, while the remaining switching valves and the heating mechanism are closed. The high-temperature and high-pressure refrigerant output by the compressor 5 enters the third heat exchanger 86 through the second switching valve 902, where it undergoes heat exchange under the action of the fan 81. The cooled refrigerant liquid is then input to the regenerator 3 through the four-way valve 85 and the seventh switching valve 84, where it exchanges heat with the return gas in the regenerator 3. The refrigerant is output to expansion valve 908. After being throttled by expansion valve 908, the refrigerant becomes a gas-liquid two-phase mixture. It then enters the second heat exchanger 2 through the third switch valve 903. The refrigerant gas output from the second heat exchanger 2 returns to the gas-liquid separator 4 through the fifteenth switch valve 910 for gas-liquid separation. After being recovered from harmful superheat by the regenerator 3, it returns to the inlet of the compressor 5 to realize the refrigeration cycle. The refrigerant entering the second heat exchanger 2 exchanges heat with the external water source and then enters the fourth heat exchanger 601 and the cold water storage tank 602 respectively to realize cooling.

[0053] It is understood that those skilled in the art can make equivalent substitutions or changes to the technical solution and inventive concept of the present invention, and all such changes or substitutions should fall within the protection scope of the present invention.

Claims

1. A heat pump system, characterized in that, The system includes a control device, a first heat exchanger, a second heat exchanger, a regenerator, a gas-liquid separator, and a compressor, a cooling mechanism, a heating mechanism, a heat exchange mechanism, a first switching valve, a second switching valve, a third switching valve, and a fourth switching valve, all electrically connected to the control device. One end of the compressor is connected to the input end of the first heat exchanger via the first switching valve and to the heat exchange mechanism via the second switching valve. The other end of the first heat exchanger is connected to the input end of the regenerator. The output end of the regenerator is connected to the input end of the second heat exchanger via the third switching valve and to the heat exchange mechanism via the fourth switching valve. The output end of the heat exchange mechanism is connected to the input end of the gas-liquid separator or to the input end of the regenerator. The output end of the gas-liquid separator is connected to the input end of the compressor via the regenerator. The heating mechanism is connected to the first heat exchanger, and the cooling mechanism is connected to the second heat exchanger. The system also includes a first filter, a second filter, and a first check valve and an expansion valve electrically connected to the control device. The output end of the regenerator, the first filter, the expansion valve, and the second filter are connected sequentially. The output of the second filter is connected to the third and fourth switching valves respectively; the heat exchange mechanism includes a third heat exchanger and a fan, a fifth switching valve, a sixth switching valve, a seventh switching valve, and a four-way valve, all electrically connected to the control device. The second heat exchanger is connected to port one of the four-way valve via the fifth switching valve. The third heat exchanger is connected to ports two and three of the four-way valve. Port four of the four-way valve is connected to the sixth and seventh switching valves respectively. The output of the sixth switching valve is connected to the gas-liquid separator. The device is connected as follows: the output end of the seventh switching valve is connected to the input end of the regenerator; the third heat exchanger is located on the air outlet side of the fan; the compressor is connected to the input end of the third heat exchanger via the second switching valve; the regenerator is connected to the input end of the third heat exchanger via the fourth switching valve; the heat exchange mechanism also includes a second check valve electrically connected to the control device; port two of the four-way valve is connected to the input end of the third heat exchanger via the second check valve; and the output end of the third heat exchanger is connected to port three of the four-way valve.

2. A heat pump system according to claim 1, characterized in that, The heat exchange mechanism also includes operating condition detection components that are electrically connected to the control device. The operating condition detection components are disposed at the output end of the second heat exchanger and are used to detect the operating condition of the refrigerant output by the second heat exchanger.

3. A heat pump system according to claim 1, characterized in that, The cooling mechanism includes a fourth heat exchanger, a cold water storage tank, and an eighth switch valve, a ninth switch valve, a tenth switch valve, a third check valve, and a first delivery pump, all electrically connected to the control device. The input end of the eighth switch valve is used to connect to an external water source. The output end of the eighth switch valve and the output end of the fourth heat exchanger are respectively connected to the input end of the fourth heat exchanger through the first delivery pump. The output end of the fourth heat exchanger is connected to the input end of the cold water storage tank through the ninth switch valve and to the input end of the fourth heat exchanger through the tenth switch valve. The third check valve is located at the output end of the fourth heat exchanger.

4. A heat pump system according to claim 3, characterized in that, The cooling mechanism further includes a first expansion tank, a first exhaust valve, and a first water flow switch, which are electrically connected to the control device respectively. The first expansion tank, the first exhaust valve, and the first water flow switch are disposed on the connecting pipeline between the eighth switch valve and the first delivery pump.

5. A heat pump system according to claim 1, characterized in that, The heating mechanism includes a fifth heat exchanger, a hot water storage tank, and an eleventh switching valve, a twelfth switching valve, a thirteenth switching valve, a fourth check valve, and a second delivery pump, all electrically connected to the control device. The input end of the eleventh switching valve is used to connect to an external water source. The output end of the eleventh switching valve and the output end of the fifth heat exchanger are respectively connected to the input end of the fifth heat exchanger through the second delivery pump. The output end of the fifth heat exchanger is connected to the input end of the hot water storage tank through the twelfth switching valve, and is also connected to the input end of the fifth heat exchanger through the twelfth switching valve. The fourth check valve is located at the output end of the fifth heat exchanger.

6. A heat pump system according to claim 5, characterized in that, The heating mechanism also includes a second expansion tank, a second vent valve, and a second flow switch, which are electrically connected to the control device. The second expansion tank, the second vent valve, and the second flow switch are located on the connecting pipeline between the eleventh switch valve and the second delivery pump.

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