Multi-source heat pump water heating device combining PVT with bathing wastewater and air source and operation method

Abstract

The invention discloses a PVT combined bathing wastewater and air source multi-source heat pump water heating device and an operation method. The device comprises a bathing wastewater waste heat collecting loop, a PVT hot water collecting loop and a multi-source heat pump loop, wherein the bathing wastewater waste heat collecting loop, the PVT hot water collecting loop and the multi-source heat pump loop are used for heating municipal water supply; the heated municipal supplied water is stored in the heat supply water tank, and the heat supply water tank is used for providing hot water for users; the multi-source heat pump loop is further used for conducting secondary waste heat recovery on bathing waste water through the bathing waste water waste heat collecting loop and conducting secondary waste heat recovery on low-temperature water through the PVT hot water collecting loop. According to the system, bathing wastewater waste heat, PVT heat production and air energy are comprehensively utilized, and the bathing wastewater waste heat can fully guarantee that domestic hot water is stably produced under the conditions of outdoor low temperature, poor solar radiation or no solar radiation; pVT heat production and an air source can improve the energy efficiency level and stability of hot water production under the conditions of high outdoor temperature, good solar radiation conditions or insufficient bathing wastewater, and complementary advantages are achieved.

Description

Technical Field

[0001] This invention relates to a multi-source heat pump water heating device and its operation method that combines PVT with bath wastewater and air source, belonging to the field of renewable energy utilization and waste heat recovery heating technology. Background Technology

[0002] Hot water for bathing and domestic use is an essential requirement for a high-quality life. Currently, hot water supply for bathing and domestic use generally relies on gas-fired boilers and electric boilers (electric water heaters). Gas-fired boilers have high carbon emissions and will be gradually replaced in the future; electric boilers (electric water heaters) consume a lot of electricity and have high operating costs. In recent years, air source heat pumps, solar water heaters, and PVT technology have been developed and applied. Air source heat pumps generally have high energy efficiency, but their heating capacity is poor in winter when outdoor temperatures are low; solar water heaters and PVT can make full use of solar energy resources, but the heating capacity of solar energy is unstable with weather changes. There are also devices that use waste heat recovery from bathing wastewater for heating, but single-form waste heat recovery from bathing wastewater cannot further improve the system's energy efficiency and heating capacity.

[0003] Therefore, there is an urgent need for a multi-source heat pump water heating system that can comprehensively utilize PVT, bath wastewater, and air energy. Summary of the Invention

[0004] The purpose of this invention is to provide a multi-source heat pump water heating device and operation method that combines PVT with bath wastewater and air source. It comprehensively utilizes the waste heat from bath wastewater, heat generated by PVT, and air energy. The waste heat from bath wastewater can fully guarantee the stable production of domestic hot water under conditions of low outdoor temperature, poor solar radiation, or no solar radiation. The heat generated by PVT and the air source can improve the energy efficiency and stability of hot water production when the outdoor temperature is high, the solar radiation conditions are good, or the bath wastewater is insufficient, thus achieving complementary advantages.

[0005] To achieve the above objectives, the present invention is implemented using the following technical solution.

[0006] In a first aspect, the present invention provides a multi-source heat pump water heating device combining PVT and bath wastewater and air source, comprising: a bath wastewater waste heat collection circuit, a PVT hot water collection circuit and a multi-source heat pump circuit for heating municipal water supply; the heated municipal water supply is stored in a hot water supply tank, which is used to provide hot water to users; The multi-source heat pump circuit is also used to perform secondary waste heat recovery of bath wastewater through the bath wastewater waste heat collection circuit and to perform secondary waste heat recovery of low-temperature water in the PVT hot water collection circuit through the PVT hot water collection circuit. The waste heat collection circuit for bathing wastewater includes a first heat exchanger and a second heat exchanger. The first heat exchanger is used to heat the municipal water supply flowing through the third solenoid valve, and the second heat exchanger is used to heat the low-temperature water flowing through the fifth solenoid valve from the water source evaporator. The PVT hot water collection circuit includes a third heat exchanger and a fourth heat exchanger. The third heat exchanger is used to heat the low-temperature water flowing through the fourth solenoid valve of the municipal water supply, and the fourth heat exchanger is used to heat the low-temperature water flowing through the sixth solenoid valve of the water source evaporator. The multi-source heat pump circuit includes a water source evaporator, an air source evaporator, a first solenoid valve, a second solenoid valve, and a condenser. The refrigerant flows out through the condenser and enters the water source evaporator in parallel through the first solenoid valve for waste heat recovery from bath wastewater and PVT hot water; it enters the air source evaporator through the second solenoid valve for absorbing ambient heat.

[0007] Furthermore, the wastewater heat collection circuit also includes a bathroom drain, a wastewater collection pipe, a filter, a wastewater tank, a first circulation pump, a wastewater drain pipe, a water level gauge, and a first thermometer.

[0008] Furthermore, the wastewater collection pipe is used to collect wastewater discharged from the bathroom floor drain. After passing through a filter, it is connected to a wastewater tank. The wastewater in the wastewater tank flows through the first heat exchanger via the first circulation pump to heat the municipal water supply. It then flows through the second heat exchanger to heat the low-temperature water flowing out of the water source evaporator. After the high-temperature wastewater is recovered by the two-stage waste heat recovery process of the first and second heat exchangers, it becomes low-temperature wastewater and is discharged to the wastewater drain pipe.

[0009] Furthermore, the PVT hot water collection circuit also includes a PVT module, a second circulation pump, a solar hot water storage tank, a seventh solenoid valve, an eighth solenoid valve, a ninth solenoid valve, a tenth solenoid valve, a third thermometer, and a fifth thermometer.

[0010] Furthermore, the high-temperature ethylene glycol antifreeze in the PVT module flows sequentially through the third heat exchanger via the second circulation pump to heat the municipal water supply, through the fourth heat exchanger to heat the low-temperature water flowing out of the water source evaporator, and through the solar hot water storage tank to store hot water. After two stages of waste heat recovery through the third and fourth heat exchangers, the high-temperature ethylene glycol antifreeze becomes low-temperature ethylene glycol antifreeze and enters the PVT module for the next cycle of heat absorption and temperature increase.

[0011] Furthermore, the multi-source heat pump circuit also includes an expansion valve, a compressor, a fan, and a second thermometer.

[0012] Furthermore, the refrigerant in the multi-source heat pump condenser is cooled by low-temperature municipal water supply, then flows through the expansion valve for further expansion and cooling. It then enters the water source evaporator through the first solenoid valve and the air source evaporator through the second solenoid valve. The low-temperature, low-pressure refrigerant exiting the water source and air source evaporators is compressed by the compressor into a high-temperature, high-pressure refrigerant, which then enters the condenser to complete the heating cycle. The low-temperature water on the water source side of the water source evaporator flows through the fifth solenoid valve to the second heat exchanger for heating, and then through the sixth solenoid valve to the fourth heat exchanger for heating. The outlet pipes of the second and fourth heat exchangers converge and flow into the water source evaporator through the fifth circulation pump to complete the cycle. On the air source side of the multi-source heat pump air source evaporator, outdoor air is drawn in by the fan, heat-exchanged in the air source evaporator, and then discharged to complete the cycle.

[0013] Furthermore, the hot water supply module also includes municipal water supply pipes, a fourth thermometer, a fourth circulation pump, a third circulation pump, a hot water tank, and a hot water supply pipe for bathing.

[0014] Furthermore, municipal water supply enters the first heat exchanger for heat exchange via the third solenoid valve and the third heat exchanger via the fourth solenoid valve. The municipal water supply, heated by the first and third heat exchangers, flows in parallel through the fourth circulating pump into the multi-source heat pump condenser for further heating. The heated water then flows into the hot water supply tank for storage. When a user needs hot water, the third circulating pump starts, supplying hot water to the user through the hot water supply pipe.

[0015] This invention uses an integrated hot water supply module to heat municipal water supply. When users use hot water for bathing, the system collects wastewater in real time through the bathroom drain and directs it into a dedicated wastewater heat collection circuit to achieve efficient and continuous waste heat recovery.

[0016] Furthermore, the first heat exchanger, the second heat exchanger, the third heat exchanger, and the fourth heat exchanger are plate heat exchangers or heat exchangers with similar functions. The wastewater tank is an insulated water tank; The PVT module can be a photovoltaic-thermal integrated module or a solar collector.

[0017] Furthermore, the electricity generated by the PVT can be used by the multi-source heat pump or for other electrical appliances of the user.

[0018] In a second aspect, the present invention provides a method for operating a multi-source heat pump hot water system that combines PVT with bath wastewater and air source, wherein the multi-source heat pump hot water device using PVT combined with bath wastewater and air source as described in any one of the first aspects comprises: Real-time monitoring and comparison of air temperature, wastewater tank water temperature and PVT outlet water temperature, selection of heat source mode and control of operation: when the PVT outlet water temperature is the highest, the heat pump starts water source mode, opens the first solenoid valve and the fifth circulation pump, and closes the second solenoid valve and fan on the air source side. When the air temperature is at its highest, the heat pump switches to air source mode, turns on the second solenoid valve and the fan, and turns off the first solenoid valve and the fifth circulation pump. When the wastewater tank has the highest water temperature but the water volume is below the minimum water level, the heat pump first starts in air source mode. Once the wastewater tank reaches the second water level, it automatically switches to water source mode to recover waste heat from the bathing wastewater.

[0019] Furthermore, the second water level in the wastewater tank is higher than the minimum water level and lower than the maximum water level. The minimum water level is used to prevent the first circulation pump from running dry and failing to extract wastewater from the wastewater tank, while the maximum water level is used to prevent wastewater from overflowing from the wastewater tank.

[0020] Furthermore, the multi-source heat pump controller monitors the water level in the wastewater tank based on the water level gauge. When the water level in the wastewater tank is less than or equal to the minimum water level, the first circulation pump stops running. When the water level in the wastewater tank reaches the second water level, the first circulation pump starts to drain the water.

[0021] Furthermore, the second circulation pump is started and stopped based on the comparison between the PVT outlet water temperature and the municipal water temperature. When the water temperature of the third thermometer at the outlet of the PVT component is lower than the water temperature of the fourth thermometer of the municipal water supply in the hot water supply circuit, the second circulation pump stops running; otherwise, the second circulation pump is started. Furthermore, when the PVT generates heat and the multi-source heat pump does not require heating, the outlet of the second circulation pump is connected to the solar water storage tank through the ninth solenoid valve for heat storage; when the PVT does not generate heat and the multi-source heat pump requires heating, the inlet of the second circulation pump is connected to the solar water storage tank through the seventh solenoid valve to extract hot water for heat exchange in the third and fourth heat exchangers.

[0022] In the method of this invention, ethylene glycol antifreeze is filled into the PVT hot water collection circuit. A third thermometer is installed inside the PVT component near the ethylene glycol antifreeze outlet to directly obtain the actual temperature after heating, providing key data for system energy efficiency assessment and antifreeze control, thereby ensuring stable operation and improving overall energy efficiency.

[0023] Furthermore, the heating path of the municipal water supply in the heat exchanger is adjusted by the third and fourth solenoid valves. In water source mode, start the fifth circulation pump to preheat the circulating water by passing it through the corresponding heat exchanger.

[0024] Furthermore, the heat source mode is switched by solenoid valves according to the heat generation status of PVT and the availability of bath wastewater: when the PVT module generates heat and there is wastewater available in the wastewater tank, that is, when the water temperature measured by the third thermometer at the outlet of the PVT module is greater than the water temperature measured by the fourth thermometer in the municipal water supply pipe in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank is greater than the minimum water level, the third, fourth, fifth and sixth solenoid valves are opened to start the water source mode. When the PVT module generates heat and there is no wastewater available in the wastewater tank, that is, when the water temperature measured by the third thermometer at the outlet of the PVT module is greater than the water temperature measured by the fourth thermometer in the municipal water supply pipe in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank is less than or equal to the minimum water level, the fourth and sixth solenoid valves are opened, and the third and fifth solenoid valves are closed, and the water source mode is started by the waste heat of the PVT. When the PVT module does not generate heat and there is wastewater available in the wastewater tank, that is, when the water temperature measured by the third thermometer at the outlet of the PVT module is less than or equal to the water temperature measured by the fourth thermometer in the municipal water supply pipe in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank is greater than the minimum water level, the third and fifth solenoid valves are opened, and the fourth and sixth solenoid valves are closed, and the water source mode is started by the residual heat of the bathing wastewater. When the PVT module does not generate heat and there is no wastewater available in the wastewater tank, that is, when the water temperature measured by the third thermometer at the outlet of the PVT module is less than or equal to the water temperature measured by the fourth thermometer in the municipal water supply pipe in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank is less than or equal to the minimum water level, the third solenoid valve is opened, the fourth solenoid valve, the fifth solenoid valve and the sixth solenoid valve are closed, and the air source mode is started. When the PVT module does not generate heat and there is no wastewater available in the wastewater tank, but there is hot water available in the solar hot water storage tank, that is, when the water temperature measured by the third thermometer at the outlet of the PVT module is less than or equal to the water temperature measured by the fourth thermometer in the municipal water supply circuit, the water level measured by the water level gauge in the wastewater tank is less than or equal to the minimum water level, and the water temperature measured by the fifth thermometer in the solar hot water storage tank is higher than the water temperature measured by the fourth thermometer in the municipal water supply circuit, the fourth and sixth solenoid valves are opened, the third and fifth solenoid valves are closed, the seventh and tenth solenoid valves are opened, and the eighth and ninth solenoid valves are closed, and the water source mode is started through the solar hot water storage tank.

[0025] Thirdly, the present invention provides a computer-readable storage medium having a computer program / instruction stored thereon, which, when executed by a processor, implements the steps of the multi-source heat pump hot water operation method for PVT combined with bathing wastewater and air source as described in any of the second aspects.

[0026] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: 1. The multi-source heat pump water heating device combining PVT and bath wastewater and air source provided by this invention works collaboratively under the intelligent scheduling of the multi-source heat pump controller through a bath wastewater waste heat collection loop, a PVT hot water collection loop, and a multi-source heat pump loop: the bath wastewater waste heat collection loop and the PVT hot water collection loop recover bath wastewater waste heat and solar heat in parallel, respectively; the heat sources under different paths are efficiently utilized through the water source mode and air source mode in the multi-source heat pump loop; finally, the hot water supply module heats the municipal water supply to continuously provide domestic hot water for users; 2. The multi-source heat pump hot water operation method of PVT combined with bathing wastewater and air source provided by the present invention is controlled by a multi-source heat pump controller. It recovers solar energy through PVT components, recovers heat from the air through air source evaporators, and recovers waste heat from bathing wastewater. It combines PVT technology, bathing wastewater and heat pump technology. The waste heat from bathing wastewater can fully guarantee the stable production of domestic hot water under the conditions of low outdoor temperature, poor solar radiation or no solar radiation. PVT heat production and air source can improve the energy efficiency and stability of hot water production when the outdoor temperature is high, the solar radiation conditions are good or the bathing wastewater is insufficient, so as to achieve complementary advantages. 3. The computer-readable storage medium provided by the present invention can execute the steps of the multi-source heat pump hot water operation method of PVT combined with bathing wastewater and air source provided by the present invention. Attached Figure Description

[0027] Figure 1 This is a frame diagram of a multi-source heat pump water heating device that combines PVT with bath wastewater and air source according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the waste heat collection loop for bathing wastewater in a multi-source heat pump water heating device that combines PVT and air sources according to an embodiment of the present invention. Detailed Implementation

[0028] It should be noted that: The technical solution of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solution of the present invention, rather than limitations thereof. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0029] The term "and / or" simply describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Additionally, the character " / " generally indicates that the preceding and following related objects have an "or" relationship. Example 1

[0030] like Figure 1 As shown in the figure, this embodiment introduces a multi-source heat pump water heating device that combines PVT with bath wastewater and air source heat pumps, including: The system includes a waste heat collection loop for bathing wastewater, a PVT hot water collection loop, and a multi-source heat pump loop for heating municipal water supply. The heated municipal water supply is stored in a hot water supply tank 17, which is used to provide hot water to users. The multi-source heat pump circuit is also used to perform secondary waste heat recovery of bath wastewater through the bath wastewater waste heat collection circuit and to perform secondary waste heat recovery of low-temperature water in the PVT hot water collection circuit through the PVT hot water collection circuit. The waste heat collection circuit for bathing wastewater includes a first heat exchanger 8 and a second heat exchanger 9. The first heat exchanger 8 is used to heat the municipal water supply flowing through the third solenoid valve 19, and the second heat exchanger 9 is used to heat the low-temperature water flowing through the water source evaporator 14 through the fifth solenoid valve 21. The PVT hot water collection circuit includes a third heat exchanger 3 and a fourth heat exchanger 4. The third heat exchanger 3 is used to heat the low-temperature water flowing through the fourth solenoid valve 20 from the municipal water supply, and the fourth heat exchanger 4 is used to heat the low-temperature water flowing through the sixth solenoid valve 22 from the water source evaporator 14. The multi-source heat pump circuit includes a water source evaporator 14, an air source evaporator 15, a first solenoid valve 12, a second solenoid valve 13, and a condenser 10. The refrigerant flows out through the condenser 10 and enters the water source evaporator 14 in parallel through the first solenoid valve 12 for waste heat recovery from bath wastewater and PVT hot water; it enters the air source evaporator 15 through the second solenoid valve 13 for absorbing ambient heat.

[0031] Furthermore, the wastewater heat collection circuit also includes a bathroom drain 36, a wastewater collection pipe 23, a filter 5, a wastewater tank 6, a first circulation pump 7, a wastewater drain pipe 24, a water level gauge 31, and a first thermometer 28.

[0032] Furthermore, the bath wastewater collection pipe 23 is used to collect the wastewater discharged from the bathroom drain 36. After passing through the filter 5, it is connected to the wastewater tank 6. The wastewater in the wastewater tank 6 flows through the first circulation pump 7 through the first heat exchanger 8 to heat the municipal water supply, and then through the second heat exchanger 9 to heat the low-temperature water flowing out of the water source evaporator. After the high-temperature bath wastewater is recovered by the two-stage waste heat recovery of the first heat exchanger 8 and the second heat exchanger 9, it becomes low-temperature bath wastewater and is discharged to the wastewater drain pipe 24.

[0033] Furthermore, the PVT hot water collection circuit also includes a PVT component 1, a second circulation pump 2, a solar hot water storage tank 40, a seventh solenoid valve 41, an eighth solenoid valve 42, a ninth solenoid valve 44, a tenth solenoid valve 45, a third thermometer 32, and a fifth thermometer 43.

[0034] Furthermore, the high-temperature ethylene glycol antifreeze in the PVT component flows sequentially through the third heat exchanger 3 via the second circulation pump 2 to heat the municipal water supply, and then through the fourth heat exchanger 4 to heat the low-temperature water flowing out of the water source evaporator. After two stages of waste heat recovery through the third and fourth heat exchangers, the high-temperature ethylene glycol antifreeze becomes low-temperature ethylene glycol antifreeze and enters the PVT component 1 for the next cycle of heat absorption and temperature rise.

[0035] Furthermore, the multi-source heat pump circuit also includes an expansion valve 11, a compressor 16, a fan 34, and a second thermometer 29. In this embodiment, the multi-source heat pump uses water source mode and air source mode for heating.

[0036] Furthermore, the refrigerant in the condenser 10 is cooled by the low-temperature municipal water supply, then flows through the expansion valve 11 for further expansion and cooling. It then enters the water source evaporator 14 through the first solenoid valve 12 and the air source evaporator 15 through the second solenoid valve 13. The low-temperature, low-pressure refrigerant exiting the water source evaporator 14 and the air source evaporator 15 is compressed by the compressor 16 to become a high-temperature, high-pressure refrigerant, which then enters the condenser 10 to complete the heating cycle. The low-temperature water on the water source side of the water source evaporator 14 flows through the fifth solenoid valve 21 through the second heat exchanger 9 to be heated, and then flows through the sixth solenoid valve 22 through the fourth heat exchanger 4 to be heated. The outlet pipes of the second heat exchanger 9 and the fourth heat exchanger 4 converge and flow into the water source evaporator 14 through the fifth circulation pump 33 to complete the cycle. The air source evaporator 15 draws in outdoor air from the fan 34, and after heat exchange in the air source evaporator 15, it is discharged to complete the cycle.

[0037] Furthermore, the hot water supply module also includes a municipal water supply pipe 25, a fourth thermometer 35, a fourth circulation pump 27, a third circulation pump 18, a hot water supply tank 17, and a hot water supply pipe for bathing 26.

[0038] Furthermore, municipal water supply enters the first heat exchanger 8 for heat exchange via the third solenoid valve 19 and enters the third heat exchanger 3 for heat exchange via the fourth solenoid valve 29. The municipal water supply, heated by the first heat exchanger 8 and the third heat exchanger 3, flows into the multi-source heat pump condenser 10 for further heating after being connected in parallel via the fourth circulation pump 27. The heated hot water then flows into the hot water supply tank 17 for storage. When a user needs hot water, the third circulation pump 18 is started, and hot water for bathing is supplied to the user through the hot water supply pipe 26.

[0039] Furthermore, in this embodiment, the first heat exchanger 8, the second heat exchanger 9, the third heat exchanger 3, and the fourth heat exchanger 4 are plate heat exchangers. The wastewater tank 6 is an insulated water tank; The PVT component 1 can be a photovoltaic-thermal integrated component or a solar collector.

[0040] Furthermore, in this embodiment, the electrical energy generated by the PVT is used by the multi-source heat pump and by other electrical appliances of the user. Example 2

[0041] Based on the multi-source heat pump water heating device combining PVT with bath wastewater and air source described in Example 1, this example introduces a method for operating a multi-source heat pump water heating device combining PVT with bath wastewater and air source, including: Real-time monitoring and comparison of air temperature, wastewater tank water temperature and PVT outlet water temperature, selection of heat source mode and control of operation: when the PVT outlet water temperature is the highest, the heat pump starts water source mode, opens the first solenoid valve 12 and the fifth circulation pump 33, and closes the second solenoid valve 13 and fan 34 on the air source side. When the air temperature is at its highest, the heat pump switches to air source mode, opens the second solenoid valve 13 and the fan 34, and closes the first solenoid valve 12 and the fifth circulation pump 33. When the wastewater tank has the highest water temperature but the water volume is below the minimum water level of 37, the heat pump first starts the air source mode. After the wastewater tank reaches the second water level of 38, it automatically switches to the water source mode to recover waste heat using the bathing wastewater.

[0042] Furthermore, in this embodiment, the multi-source heat pump utilizes both water source and air source modes for heating.

[0043] Furthermore, such as Figure 2 As shown, the second water level 38 of the wastewater tank is higher than the lowest water level 37 and lower than the highest water level 39. In this embodiment, according to actual needs, the following settings are made: the height of the lowest water level 37 is set to be 30cm from the bottom of the wastewater tank, the height of the highest water level 39 is set to be 10cm from the top of the wastewater tank, and the height of the second water level 38 above the lowest water level 37 is set to be 10% of the height difference between the highest water level 39 and the lowest water level 37.

[0044] Furthermore, in this embodiment, the multi-source heat pump controller monitors the water level in the wastewater tank 6 according to the water level gauge 31. When the water level in the wastewater tank 6 is less than or equal to the minimum water level 37, the first circulation pump 7 stops running. When the water level in the wastewater tank 6 reaches the second water level 38, the first circulation pump is started to drain the water.

[0045] Furthermore, the second circulation pump 2 is started and stopped based on the comparison between the PVT outlet water temperature and the municipal water temperature. When the water temperature of the third thermometer 32 at the outlet of the PVT component 1 is lower than the water temperature of the fourth thermometer 35 of the municipal water supply in the hot water supply circuit, the second circulation pump 2 stops running; otherwise, the second circulation pump 2 is started. Furthermore, when the PVT generates heat and the multi-source heat pump does not require heating, the ninth solenoid valve 44 and the eighth solenoid valve 42 are opened, and the seventh solenoid valve 41 and the tenth solenoid valve 45 are closed. The outlet of the second circulation pump 2 is connected to the solar hot water storage tank 40 through the ninth solenoid valve 44 for heat storage. When the PVT does not generate heat and the multi-source heat pump requires heating, the inlet of the second circulation pump 2 is connected to the solar hot water storage tank 40 through the seventh solenoid valve 41 to draw hot water for heat exchange in the third heat exchanger 3 and the fourth heat exchanger 4.

[0046] Furthermore, the heating path of the municipal water supply in the heat exchanger is adjusted by the third solenoid valve 19 and the fourth solenoid valve 20. In water source mode, the fifth circulation pump 33 is started, so that the circulating water flows through the corresponding heat exchanger for preheating.

[0047] Furthermore, in this embodiment, the heat source mode is switched by solenoid valves according to the heat generation status of PVT and the availability of bath wastewater: when the PVT component generates heat and wastewater tank 6 has wastewater available, that is, when the water temperature measured by the third thermometer 32 at the outlet of PVT component 1 is greater than the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25 in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank 6 is greater than the minimum water level 37, the third solenoid valve 19, the fourth solenoid valve 20, the fifth solenoid valve 21 and the sixth solenoid valve 22 are opened to start the water source mode; When the PVT module generates heat and there is no wastewater available in the wastewater tank 6, that is, when the water temperature measured by the third thermometer 32 at the outlet of the PVT module 1 is greater than the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25 in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank 6 is less than or equal to the minimum water level 37, the fourth solenoid valve 20 and the sixth solenoid valve 22 are opened, and the third solenoid valve 19 and the fifth solenoid valve 21 are closed, and the water source mode is started by the waste heat of the PVT. When the PVT module does not generate heat and there is wastewater available in the wastewater tank 6, that is, when the water temperature measured by the third thermometer 32 at the outlet of the PVT module 1 is less than or equal to the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25 in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank 6 is greater than the minimum water level 37, the third solenoid valve 19 and the fifth solenoid valve 21 are opened, and the fourth solenoid valve 20 and the sixth solenoid valve 22 are closed, and the water source mode is started by the residual heat of the bathing wastewater. When the PVT module does not generate heat and there is no wastewater available in the wastewater tank 6, that is, when the water temperature measured by the third thermometer 32 at the outlet of the PVT module 1 is less than or equal to the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25 in the hot water supply circuit, and when the water level measured by the water level gauge in the wastewater tank 6 is less than or equal to the minimum water level 37, the third solenoid valve 19 is opened, the fourth solenoid valve 20, the fifth solenoid valve 21 and the sixth solenoid valve 22 are closed, and the air source mode is started. When the PVT module does not generate heat and there is no wastewater available in the wastewater tank 6, but there is hot water available in the solar hot water storage tank 40, that is, when the water temperature measured by the third thermometer 32 at the outlet of the PVT module 1 is less than or equal to the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25 in the hot water supply circuit, the water level measured by the water level gauge in the wastewater tank 6 is less than or equal to the minimum water level 37, and the water temperature measured by the fifth thermometer 43 of the solar hot water storage tank 40 is higher than the water temperature measured by the fourth thermometer 35 of the municipal water supply pipe 25, the fourth solenoid valve 20 and the sixth solenoid valve 22 are opened, the third solenoid valve 19 and the fifth solenoid valve 21 are closed, the seventh solenoid valve 41 and the tenth solenoid valve 45 are opened, and the eighth solenoid valve 42 and the ninth solenoid valve 44 are closed, the water source mode is started through the solar hot water storage tank 40. Example 3

[0048] Based on the multi-source heat pump hot water operation method of PVT combined with bath wastewater and air source described in Embodiment 2, this embodiment introduces a computer-readable storage medium storing a computer program / instruction thereon. When the computer program / instruction is executed by a processor, it implements the steps of the multi-source heat pump hot water operation method of PVT combined with bath wastewater and air source as described in any of Embodiment 2.

[0049] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0050] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0051] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0052] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0053] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A multi-source heat pump water heating device combining PVT (Polyhydrodynamic Transformation) with bath wastewater and air source heat pumps, characterized in that, include: Wastewater heat collection circuit, PVT hot water collection circuit and multi-source heat pump circuit are used to heat municipal water supply; the heated municipal water supply is stored in hot water supply tank (17), which is used to provide hot water to users; The multi-source heat pump circuit is also used to perform secondary waste heat recovery of bath wastewater through the bath wastewater waste heat collection circuit and to perform secondary waste heat recovery of low-temperature water in the PVT hot water collection circuit through the PVT hot water collection circuit. The waste heat collection circuit for bathing wastewater includes a first heat exchanger (8) and a second heat exchanger (9). The first heat exchanger (8) is used to heat the municipal water supply flowing through the third solenoid valve (19), and the second heat exchanger (9) is used to heat the low-temperature water flowing through the fifth solenoid valve (21) of the water source evaporator (14). The PVT hot water collection circuit includes a third heat exchanger (3) and a fourth heat exchanger (4). The third heat exchanger (3) is used to heat the low-temperature water flowing through the fourth solenoid valve (20) of the municipal water supply, and the fourth heat exchanger (4) is used to heat the low-temperature water flowing through the sixth solenoid valve (22) of the water source evaporator (14). The multi-source heat pump circuit includes a water source evaporator (14), an air source evaporator (15), a first solenoid valve (12), a second solenoid valve (13), and a condenser (10). The refrigerant flows out through the condenser (10) and enters the water source evaporator (14) in parallel through the first solenoid valve (12) for waste heat recovery from bath wastewater and PVT hot water; it enters the air source evaporator (15) through the second solenoid valve (13) for absorbing ambient heat.

2. The multi-source heat pump water heating device combining PVT with bathing wastewater and air source as described in claim 1, characterized in that, The waste heat collection circuit for bathing wastewater also includes a bathroom drain (36), a wastewater collection pipe (23), a filter (5), a wastewater tank (6), a first circulation pump (7), a wastewater drain pipe (24), a water level gauge (31), and a first thermometer (28). The wastewater collection pipe (23) is used to collect the wastewater discharged from the bathroom drain. It is connected to the wastewater tank (6) through the filter (5). The wastewater in the wastewater tank (6) flows through the first heat exchanger (8) and the second heat exchanger (9) in sequence through the first circulation pump (7). After the high-temperature wastewater is recovered by two stages of waste heat, it becomes low-temperature wastewater and is discharged to the wastewater drain pipe (24).

3. The multi-source heat pump water heating device combining PVT with bathing wastewater and air source as described in claim 1, characterized in that, The PVT hot water collection circuit also includes a PVT component (1), a second circulation pump (2), a solar hot water storage tank (40), a seventh solenoid valve (41), an eighth solenoid valve (42), a ninth solenoid valve (44), a tenth solenoid valve (45), a third thermometer (32), and a fifth thermometer (43). The high-temperature ethylene glycol antifreeze in the PVT component (1) flows through the third heat exchanger (3), the fourth heat exchanger (4) and the solar water storage tank (40) in sequence via the second circulation pump (2). After two stages of waste heat recovery, the high-temperature ethylene glycol antifreeze becomes low-temperature ethylene glycol antifreeze and enters the PVT component (1) for the next cycle of heat absorption and temperature rise.

4. The multi-source heat pump water heating device combining PVT with bathing wastewater and air source as described in claim 1, characterized in that, The multi-source heat pump circuit also includes an expansion valve (11), a compressor (16), a fan (34), and a second thermometer (29). The refrigerant in the condenser (10) is cooled by the low-temperature municipal water supply, then flows through the expansion valve (11) for further expansion and cooling, and enters the water source evaporator (14) through the first solenoid valve (12), and enters the air source evaporator (15) through the second solenoid valve (13). The low-temperature and low-pressure refrigerant is compressed by the compressor (16) to become a high-temperature and high-pressure refrigerant, and enters the condenser (10) to complete the heating cycle. Low-temperature water from the water source side of the water source evaporator (14) flows through the fifth solenoid valve (21) and is heated by the second heat exchanger (9). It then flows through the sixth solenoid valve (22) and is heated by the fourth heat exchanger (4). The outlet pipes of the second heat exchanger (9) and the fourth heat exchanger (4) converge and flow into the water source evaporator (14) through the fifth circulation pump (33) to complete the circulation. The air source evaporator (15) draws in outdoor air from the fan (34) on the air side, and discharges the air after heat exchange in the air source evaporator (15) to complete the cycle.

5. The multi-source heat pump water heating device combining PVT with bathing wastewater and air source as described in claim 1, characterized in that, The hot water supply module also includes a municipal water supply pipe (25), a fourth thermometer (35), a fourth circulation pump (27), a third circulation pump (18), a hot water tank (17), and a hot water supply pipe for bathing (26). After being heated, the municipal water supply flows into the multi-source heat pump condenser (10) through the fourth circulation pump (27) for further heating. The heated water then flows into the hot water supply tank (17) for storage. When a user needs hot water, the third circulation pump (18) is started, and hot water for bathing is supplied to the user through the hot water supply pipe (26).

6. The multi-source heat pump water heating device combining PVT with bathing wastewater and air source as described in claim 1, characterized in that, The first heat exchanger (8), the second heat exchanger (9), the third heat exchanger (3) and the fourth heat exchanger (4) are plate heat exchangers or heat exchangers with similar functions. The wastewater tank (6) is an insulated water tank.

7. A method for operating a multi-source heat pump hot water system that combines PVT with bathing wastewater and air source heat pumps, characterized in that... The multi-source heat pump water heating device based on any one of claims 1 to 6, which combines PVT with bathing wastewater and air source, comprises: Real-time monitoring and comparison of air temperature, wastewater tank (6) water temperature and PVT outlet water temperature, select heat source mode and control operation: when the PVT outlet water temperature is the highest, the heat pump starts water source mode, opens the first solenoid valve (12) and the fifth circulation pump (33), and closes the second solenoid valve (13) and fan (34) on the air source side. When the air temperature is at its highest, the heat pump switches to air source mode, turns on the second solenoid valve (13) and the fan (34), and turns off the first solenoid valve (12) and the fifth circulation pump (33). When the water temperature in the wastewater tank (6) is at its highest but the water volume is below the lowest water level (37), the heat pump first starts the air source mode. After the water in the wastewater tank (6) reaches the second water level (38), it automatically switches to the water source mode to recover waste heat using the bathing wastewater.

8. The multi-source heat pump hot water operation method for PVT combined with bathing wastewater and air source as described in claim 7, characterized in that, The heat source mode is switched via a solenoid valve based on the heat generation status of the PVT and the availability of bath wastewater. When the water temperature measured by the third thermometer (32) at the outlet of the PVT component is greater than the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25) in the hot water supply module, and when the water level measured by the water level gauge (31) in the wastewater tank (6) is greater than the minimum water level (37), the third solenoid valve (19), the fourth solenoid valve (20), the fifth solenoid valve (21) and the sixth solenoid valve (22) are opened to start the water source mode; When the water temperature measured by the third thermometer (32) at the outlet of the PVT component is greater than the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25) in the hot water supply module, and when the water level measured by the water level gauge (31) in the wastewater tank (6) is less than or equal to the minimum water level (37), the fourth solenoid valve (20) and the sixth solenoid valve (22) are opened, and the third solenoid valve (19) and the fifth solenoid valve (21) are closed, and the water source mode is started by the waste heat of PVT. When the water temperature measured by the third thermometer (32) at the outlet of the PVT component is less than or equal to the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25) in the hot water supply module, and when the water level measured by the water level gauge (31) in the wastewater tank (6) is greater than the minimum water level (37), the third solenoid valve (19) and the fifth solenoid valve (21) are opened, and the fourth solenoid valve (20) and the sixth solenoid valve (22) are closed, and the water source mode is started by the residual heat of the bathing wastewater; When the water temperature measured by the third thermometer (32) at the outlet of the PVT component is less than or equal to the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25) in the hot water supply circuit, and when the water level measured by the water level gauge (31) in the wastewater tank (6) is less than or equal to the minimum water level (37), the third solenoid valve (19) is opened, the fourth solenoid valve (20), the fifth solenoid valve (21) and the sixth solenoid valve (22) are closed, and the air source mode is started; When the water temperature measured by the third thermometer (32) at the outlet of the PVT module is less than or equal to the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25) in the hot water supply circuit, the water level measured by the water level gauge (31) in the wastewater tank (6) is less than or equal to the minimum water level (37), and the water temperature measured by the fifth thermometer (43) of the solar hot water storage tank (40) is higher than the water temperature measured by the fourth thermometer (35) of the municipal water supply pipe (25), open the fourth solenoid valve (20) and the sixth solenoid valve (22), close the third solenoid valve (19) and the fifth solenoid valve (21), open the seventh solenoid valve (41) and the tenth solenoid valve (45), close the eighth solenoid valve (42) and the ninth solenoid valve (44), and start the water source mode through the solar hot water storage tank.

9. The multi-source heat pump hot water operation method for PVT combined with bathing wastewater and air source as described in claim 7, characterized in that, The controller of the multi-source heat pump (30) monitors the water level in the wastewater tank (6) according to the water level gauge. When the water level in the wastewater tank (6) is less than or equal to the lowest water level (37), the first circulation pump (7) stops running. When the water level in the wastewater tank (6) reaches the second water level (38), the first circulation pump (7) is started to drain water. The second circulation pump (2) is started and stopped based on the comparison between the PVT outlet water temperature and the municipal water temperature. When the water temperature of the third thermometer (32) at the outlet of the PVT component (1) is lower than the water temperature of the fourth thermometer (35) of the municipal water supply in the hot water supply circuit, the second circulation pump (2) stops running; otherwise, the second circulation pump (2) is started. The heating path of municipal water supply in the heat exchanger is adjusted by the third solenoid valve (19) and the fourth solenoid valve (20); In water source mode, start the fifth circulation pump (33) to preheat the circulating water through the corresponding heat exchanger.

10. A computer-readable storage medium having a computer program / instructions stored thereon, characterized in that, When the computer program / instruction is executed by the processor, it implements the steps of the multi-source heat pump hot water operation method of PVT combined with bathing wastewater and air source as described in any of claims 7 to 9.

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