A combined mechanism of dual-heat-source pump and photovoltaic-thermal collector

Abstract

The utility model provides a kind of combination mechanism of double heat source pump and photovoltaic photo-thermal collector, it switches heat according to the thermal energy of photovoltaic photo-thermal collector by double heat source pump, and then while reducing energy cost, all-weather hot water supply is carried out.It includes:photovoltaic photo-thermal collector;Water-cooled heat exchanger;Air-cooled heat exchanger;Compressor;Electronic expansion valve;Condenser;Hot water circulating pump;And water tank;The water tank, hot water circulating pump, condenser water section combination forms water end, the starting portion of the water section of condenser is connected with cold water inflow pipeline, and hot water output pipeline is connected on the water tank;The air path circulation part formed by the compressor, condenser air path section, electronic expansion valve is respectively connected with the air path medium section of air-cooled heat exchanger, the air path medium section of water-cooled heat exchanger;The medium section of photovoltaic photo-thermal collector is connected with the water path medium section of water-cooled heat exchanger by PVT circulating pump circulation.

Description

Technical Field

[0001] This utility model relates to the field of photovoltaic and solar thermal application technology, specifically a combination mechanism of a dual heat source pump and a photovoltaic and solar thermal collector. Background Technology

[0002] Photovoltaic thermal (PVT) collectors use a liquid working fluid flowing within the collector to collect and remove the waste heat generated during the operation of photovoltaic modules. This reduces the operating temperature of the photovoltaic modules, improves power generation efficiency, and results in significant energy savings and high efficiency. The waste heat can also serve as a heat source or partial heat source, improving the efficiency of heat pumps in winter and providing high-quality hot water to meet the needs of domestic and industrial hot water. However, in practice, simply installing photovoltaic thermal collectors cannot completely solve the hot water demand. This is because there are always non-sunny days throughout the year, and every day has nights, which prevent photothermal conversion and thus hinder the reliable supply of hot water from the photovoltaic thermal collectors. Therefore, there is an urgent need to develop a system that can use photovoltaic thermal collectors for all-weather hot water supply, thereby reducing energy costs and providing a reliable hot water supply. Utility Model Content

[0003] To address the aforementioned issues, this invention provides a combined mechanism of a dual heat source pump and a photovoltaic thermal collector. The dual heat source pump switches heat exchange based on the thermal energy of the photovoltaic thermal collector, thereby reducing energy costs while providing hot water supply around the clock.

[0004] A combined mechanism of a dual heat source pump and a photovoltaic thermal collector, characterized in that it comprises:

[0005] Photovoltaic thermal collectors;

[0006] Water-cooled heat exchanger;

[0007] Air-cooled heat exchanger;

[0008] compressor;

[0009] Electronic expansion valve;

[0010] Condenser;

[0011] Hot water circulation pump;

[0012] And the water tank;

[0013] The water tank, hot water circulation pump, and condenser water circuit section are combined to form the water supply end. The beginning part of the condenser water circuit section is connected to a cold water inlet pipe, and the water tank is connected to a hot water outlet pipe.

[0014] The gas path circulation section formed by the compressor, the condenser, and the electronic expansion valve is connected in parallel to the gas path medium section of the air-cooled heat exchanger and the gas path medium section of the water-cooled heat exchanger, respectively.

[0015] The medium section of the photovoltaic thermal collector is circulated and connected to the water medium section of the water-cooled heat exchanger via a PVT circulating pump.

[0016] Its further features are:

[0017] After the compressor draws in low-temperature, low-pressure refrigerant gas, it compresses it into high-temperature, high-pressure gas, which flows to the gas section of the condenser. The gas section of the condenser heats the cold water in the water section of the condenser. After being condensed by the condenser, the high-temperature, high-pressure gas becomes a high-pressure liquid refrigerant and then passes through the electronic expansion valve to form a low-temperature, low-pressure vapor-liquid mixture. The low-temperature, low-pressure vapor-liquid mixture is heated by a water-cooled heat exchanger or an air-cooled heat exchanger to form low-temperature, low-pressure refrigerant gas, which then flows back into the compressor.

[0018] The output end of the electronic expansion valve is connected to port a of the first three-way valve, port b of the first three-way valve is connected to the inlet of the gas medium section of the air-cooled heat exchanger, and port C of the first three-way valve is connected to the inlet of the gas medium section of the water-cooled heat exchanger.

[0019] The pipeline corresponding to the input end of the compressor's low-temperature and low-pressure refrigerant gas is connected to port d of the second three-way valve, port e of the second three-way valve is connected to the outlet of the gas medium section of the air-cooled heat exchanger, and port f of the second three-way valve is connected to the outlet of the gas medium section of the water-cooled heat exchanger.

[0020] The water-cooled heat exchanger is arranged relatively close to the photovoltaic thermal collector to ensure that relatively few pipes are used when connecting.

[0021] The compressor is powered by the electricity from the photovoltaic thermal collector and the mains power. When the electricity from the photovoltaic thermal collector cannot ensure the compressor works normally, the mains power will intervene in the power supply to the compressor in a timely manner.

[0022] The air-cooled heat exchanger includes a heating module and a fan. The heating module and fan are connected to the power supply of the photovoltaic thermal collector and the mains power. When the power supply of the photovoltaic thermal collector cannot ensure the normal operation of the heating module and fan, the mains power will intervene in time to supply power.

[0023] With the structure of this utility model, a water-cooled heat exchanger is connected in parallel with the air-cooled heat exchanger. The heat source for heating cold water is switched by controlling the path of the refrigerant. When the main unit is started, the photovoltaic thermal collector and the hot water circulation pump are activated. By detecting the inlet and outlet water temperatures on the photovoltaic thermal collector side, the heat energy that the photovoltaic thermal collector can provide is calculated. If the heat energy that the photovoltaic thermal collector can provide is greater than the heat required by the unit, the refrigerant is controlled to flow to the water-cooled heat exchanger. If the heat energy that the photovoltaic thermal collector can provide is less than the heat required by the unit, the refrigerant is controlled to flow to both water-cooled heat exchangers and the air-cooled heat exchanger simultaneously, until the heat provided by the PVT is less than 20% of the heat required by the unit. At this point, the water-cooled heat exchanger is shut down, and the air-cooled heat exchanger exchanges heat with the refrigerant through the air. The dual heat source pump switches the heat exchange according to the heat energy of the photovoltaic thermal collector, thereby reducing energy costs and providing hot water supply around the clock. Attached Figure Description

[0024] Figure 1 This is a simplified structural diagram of the present invention;

[0025] The names corresponding to the serial numbers in the diagram are as follows:

[0026] Cold water inlet pipe 1; hot water outlet pipe 2;

[0027] Photovoltaic thermal collector 10, water-cooled heat exchanger 20, air-cooled heat exchanger 30, compressor 40, electronic expansion valve 50, condenser 60, hot water circulation pump 70, water tank 80, PVT circulation pump 90, first three-way valve 100, port a 101, port b 102, port C 103, second three-way valve 200, port d 201, port e 202, port f 203. Detailed Implementation

[0028] A combined mechanism of a dual heat source pump and a photovoltaic thermal collector, see Figure 1 It includes: a photovoltaic thermal collector 10, a water-cooled heat exchanger 20, an air-cooled heat exchanger 30, a compressor 40, an electronic expansion valve 50, a condenser 60, a hot water circulation pump 70, and a water tank 80.

[0029] The water circuit of water tank 80, hot water circulation pump 70 and condenser 60 is combined to form the water supply end. The beginning part of the water circuit of condenser 60 is connected to cold water inlet pipe 1, and hot water outlet pipe 2 is connected to water tank 80.

[0030] The gas path sections of the compressor 40 and condenser 60, and the gas path circulation section formed by the electronic expansion valve 50 are respectively connected in parallel to the gas path medium section of the air-cooled heat exchanger 30 and the gas path medium section of the water-cooled heat exchanger 20.

[0031] The medium section of the photovoltaic thermal collector 10 is circulated and connected to the water medium section of the water-cooled heat exchanger 20 via a PVT circulating pump 90.

[0032] In specific implementation, the output end of the electronic expansion valve 50 is connected to port a 101 of the first three-way valve 100, port b 102 of the first three-way valve 100 is connected to the inlet of the gas medium section of the air-cooled heat exchanger 30, and port C 103 of the first three-way valve 100 is connected to the inlet of the gas medium section of the water-cooled heat exchanger 20.

[0033] The pipeline corresponding to the input end of the low-temperature and low-pressure refrigerant gas of the compressor 40 is connected to the d port 201 of the second three-way valve 200, the e port 202 of the second three-way valve 200 is connected to the outlet of the gas medium section of the air-cooled heat exchanger 30, and the f port 203 of the second three-way valve 200 is connected to the outlet of the gas medium section of the water-cooled heat exchanger 20.

[0034] The water-cooled heat exchanger 20 is arranged relatively close to the photovoltaic thermal collector 10 to ensure that relatively few pipes are used when connecting.

[0035] In practice, after the compressor 40 draws in the low-temperature and low-pressure refrigerant gas, it compresses it into a high-temperature and high-pressure gas that flows into the gas path section of the condenser 60. The gas path section of the condenser 60 heats the cold water in the water path section of the condenser 60. After being condensed by the condenser 60, the high-temperature and high-pressure gas becomes a high-pressure liquid refrigerant. After passing through the electronic expansion valve 50, it forms a low-temperature and low-pressure vapor-liquid mixture. The low-temperature and low-pressure vapor-liquid mixture is heated by the water-cooled heat exchanger 20 or the air-cooled heat exchanger 30 to form a low-temperature and low-pressure refrigerant gas that flows back into the compressor 40.

[0036] The compressor 40 is powered by the power of the photovoltaic thermal collector 10 and the mains power. When the power of the photovoltaic thermal collector 10 cannot ensure the normal operation of the compressor 40, the mains power will intervene in the power supply of the compressor in time.

[0037] The air-cooled heat exchanger 30 includes a heating module and a fan. The heating module and fan are connected to the power supply of the photovoltaic thermal collector 10 and the mains power. When the power supply of the photovoltaic thermal collector 10 cannot ensure the normal operation of the heating module and the fan, the mains power will intervene in time to supply power.

[0038] Its working principle is as follows: A water-cooled heat exchanger 20 is connected in parallel with the air-cooled heat exchanger 30. The heat source for heating cold water is switched by controlling the path of the refrigerant. When the main unit is started, the photovoltaic thermal collector 10 and the hot water circulation pump 70 are started. By detecting the inlet and outlet water temperatures of the photovoltaic thermal collector 10, the heat energy that the photovoltaic thermal collector 10 can provide is calculated. If the heat energy that the photovoltaic thermal collector 10 can provide is greater than the heat required by the unit, the refrigerant is controlled to flow to the water-cooled heat exchanger 20; if... If the heat energy provided by the photovoltaic thermal collector 10 is less than the heat required by the unit, the refrigerant is controlled to flow simultaneously to the two water-cooled heat exchangers 20 and the air-cooled heat exchanger 30 until the heat provided by the photovoltaic thermal collector 10 is less than 20% of the heat required by the unit. Then, the water-cooled heat exchanger 20 is turned off, and the air-cooled heat exchanger 30 exchanges heat with the refrigerant by heating the air. The dual heat source pump switches the heat exchange according to the heat energy of the photovoltaic thermal collector, thereby reducing energy costs and providing hot water supply around the clock.

[0039] It solves the problem that solar water heaters can still provide low-grade heat sources for heat pump units to produce high-temperature domestic hot water even when sunlight conditions are slightly poor, and the operating efficiency of the heat pump is more than 30% higher than that of air source heat pump units.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A combined mechanism of a dual heat source pump and a photovoltaic thermal collector, characterized in that, It includes: Photovoltaic thermal collectors; Water-cooled heat exchanger; Air-cooled heat exchanger; compressor; Electronic expansion valve; Condenser; Hot water circulation pump; And the water tank; The water tank, hot water circulation pump, and condenser water circuit section are combined to form the water supply end. The beginning part of the condenser water circuit section is connected to a cold water inlet pipe, and the water tank is connected to a hot water outlet pipe. The gas path circulation section formed by the compressor, the condenser, and the electronic expansion valve is connected in parallel to the gas path medium section of the air-cooled heat exchanger and the gas path medium section of the water-cooled heat exchanger, respectively. The medium section of the photovoltaic thermal collector is circulated and connected to the water medium section of the water-cooled heat exchanger via a PVT circulating pump.

2. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 1, characterized in that: After the compressor draws in low-temperature, low-pressure refrigerant gas, it compresses it into high-temperature, high-pressure gas, which flows into the gas path section of the condenser. The gas path section of the condenser heats the cold water located in the water path section of the condenser. After being condensed by the condenser, the high-temperature, high-pressure gas becomes a high-pressure liquid refrigerant. After passing through the electronic expansion valve, it forms a low-temperature, low-pressure vapor-liquid mixture. The low-temperature, low-pressure vapor-liquid mixture is heated by a water-cooled heat exchanger or an air-cooled heat exchanger to form low-temperature, low-pressure refrigerant gas, which then flows back into the compressor.

3. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 2, characterized in that: The output end of the electronic expansion valve is connected to port a of the first three-way valve, port b of the first three-way valve is connected to the inlet of the gas medium section of the air-cooled heat exchanger, and port C of the first three-way valve is connected to the inlet of the gas medium section of the water-cooled heat exchanger.

4. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 3, characterized in that: The pipeline corresponding to the input end of the compressor's low-temperature, low-pressure refrigerant gas is connected to port d of a second three-way valve. Port e of the second three-way valve is connected to the outlet of the gas medium section of the air-cooled heat exchanger, and port f of the second three-way valve is connected to the outlet of the gas medium section of the water-cooled heat exchanger.

5. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 4, characterized in that: The water-cooled heat exchanger is arranged relatively close to the photovoltaic thermal collector.

6. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 1, characterized in that: The compressor is powered by electricity from the photovoltaic thermal collector and mains power.

7. The combined mechanism of a dual heat source pump and a photovoltaic thermal collector according to claim 1, characterized in that: The air-cooled heat exchanger includes a heating module and a fan, and the heating module and fan are connected to the power of the photovoltaic thermal collector and the mains power.

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