Solar photovoltaic-carbon dioxide heat pump heating system capable of storing energy across seasons

Abstract

The invention provides a cross-seasonal energy storage solar photovoltaic-carbon dioxide heat pump heating system, which relates to the technical field of heating systems and comprises an air heat exchange assembly, a refrigerant-water heat exchange assembly and a tail end heat dissipation assembly, the air heat exchange assembly comprises an evaporator; a built-in heat exchanger is arranged outside the air heat exchange assembly and the refrigerant-water heat exchange assembly. The bottom of the partition plate is fixedly connected with a temperature sensor; the temperature sensor detects the internal temperature of the device in real time, when the internal temperature of the device is too high, the control center automatically opens the shunt valve according to feedback of the temperature sensor, circulating water after heat exchange flows into the built-in heat exchanger, the built-in heat exchanger exchanges heat with air in the device, and the internal temperature of the device is reduced; the problems that external air needs to be extracted during operation of an outdoor unit, however, the outdoor unit continuously works in the high-temperature environment due to the fact that the outdoor unit is in the outdoor environment for a long time, internal components of equipment are prone to being affected by thermal stress, aging is accelerated, and the performance of the equipment is reduced are solved.

Description

Technical Field

[0001] The invention relates to the technical field of heating systems, and in particular to a solar photovoltaic-carbon dioxide heat pump heating system for storing energy across seasons. Background Art

[0002] In the field of heating, the long-term high dependence on fossil energy such as coal and natural gas has not only posed challenges to the stability of energy supply, but also released a large amount of greenhouse gases due to the combustion of fossil fuels, causing serious damage to the global climate environment. In order to achieve sustainable energy supply, it is urgent to develop new, efficient and environmentally friendly heating technologies. The carbon dioxide heat pump heating system came into being under the background of such energy transformation needs. It uses low-grade thermal energy in the air as its main energy source and only consumes a small amount of electricity to achieve the transfer of heat from low-temperature heat sources to high-temperature heating spaces, greatly reducing dependence on traditional fossil energy and providing a feasible path for alleviating the energy crisis and optimizing the energy structure.

[0003] For example, the application number: 202010131918.5 proposes a topologically homeomorphic cycle carbon dioxide heat pump heating system, which includes a carbon dioxide sub-cycle, a refrigerant sub-cycle and a water-side circulation flow path that are mutually heat-exchange connected; during operation, the topologically homeomorphic cycle carbon dioxide heat pump heating system includes a mechanically assisted subcooling cycle state and a superheat recovery cascade cycle state. Compared with the prior art, the water circuit in the present invention adopts a series form, which reduces the condensation temperature of the refrigerant, and can be equipped with a common heat pump compressor, which reduces the cost of the unit and enhances practicality; adding a carbon dioxide-water heat exchanger as a superheater reduces the exhaust heat loss of carbon dioxide and improves the energy efficiency of the system; the constructed topologically homeomorphic cycle can switch between the mechanically assisted subcooling cycle and the superheat recovery cascade cycle according to changes in ambient temperature, and always operates at a higher energy efficiency to ensure continuous and efficient heating throughout the heating season.

[0004] For the current traditional carbon dioxide heating equipment, its outdoor unit needs to draw outside air during operation. However, the outdoor unit is in an outdoor environment for a long time, and during the air extraction process, the temperature of the surrounding local area will cause an increase. If the equipment continues to work in this high temperature environment, the internal components of the equipment are susceptible to thermal stress, which in turn accelerates aging. This will significantly reduce the overall service life of the equipment, cause a decline in equipment performance, affect its normal and stable operation, and greatly weaken the practicability and reliability of the equipment. Summary of the invention

[0005] The present invention relates to a solar photovoltaic-carbon dioxide heat pump heating system for storing energy across seasons. The system comprises a temperature sensor and a built-in heat exchanger. The temperature sensor detects the internal temperature of the device in real time. When the internal temperature of the device is too high, the control center automatically opens the water diversion valve according to the feedback of the temperature sensor to allow the circulating water after heat exchange to flow into the built-in heat exchanger. The built-in heat exchanger exchanges heat with the air inside the device to reduce the internal temperature of the device, thereby realizing intelligent temperature control and extending the service life of the equipment.

[0006] The present invention provides a solar photovoltaic-carbon dioxide heat pump heating system for storing energy across seasons, which specifically includes: an air heat exchange component, a refrigerant-water heat exchange component and a terminal heat dissipation component; the air heat exchange component includes an evaporator; the head end of the evaporator is connected to a carbon dioxide compressor through a pipeline; the evaporator is connected to the inlet end of the carbon dioxide compressor; the outlet end of the carbon dioxide compressor is connected to a carbon dioxide-water heat exchanger through a pipeline; the carbon dioxide-water heat exchanger is provided with an air pipe and a water pipe; the refrigerant-water heat exchange component includes a pump body ; The water outlet end of the pump body is connected to the input end of the water pipe of the carbon dioxide-water heat exchanger through a pipeline; the output end of the water pipe of the carbon dioxide-water heat exchanger is connected to the return water tee through a pipeline; the output end of the water pipe of the carbon dioxide-water heat exchanger is connected to the input port of the return water tee; a built-in heat exchanger is provided outside the air heat exchange component and the refrigerant-water heat exchange component; an external mounting frame is provided outside the air heat exchange component and the refrigerant-water heat exchange component; a partition plate is fixedly connected to the middle position of the external mounting frame; a temperature sensor is fixedly connected to the bottom of the partition plate.

[0007] Preferably, the tail end of the evaporator is connected to an expansion valve via a pipeline; the evaporator is connected to the output end of the expansion valve.

[0008] Preferably, the carbon dioxide compressor is connected to the input end of the carbon dioxide-water heat exchanger gas delivery pipe; the output end of the carbon dioxide-water heat exchanger gas delivery end is connected to the input end of the expansion valve through a pipeline.

[0009] Preferably, the branching port of the water return tee is connected to a water return valve via a pipeline; and the branching port of the water return tee is connected to the output end of the water return valve.

[0010] Preferably, the water inlet end of the pump body is connected to a water diversion tee through a pipeline; the water inlet end of the pump body is connected to the output port of the water diversion tee; the branch port of the water diversion tee is connected to a water diversion valve through a pipeline; the branch port of the water diversion tee is connected to the input end of the water diversion valve; the water diversion valve and the return valve are respectively electrically connected to the external control center.

[0011] Preferably, the terminal heat dissipation component includes a floor heating radiator, a wall radiator and a wall-mounted radiator; the output port of the return water tee is respectively connected to the water inlet of the floor heating radiator, the wall radiator and the wall-mounted radiator through pipes; the input port of the water distribution tee is respectively connected to the water outlet of the floor heating radiator, the wall radiator and the wall-mounted radiator through pipes.

[0012] Preferably, the input port of the built-in heat exchanger is connected to the output end of the water diversion valve through a pipeline; the output port of the built-in heat exchanger is connected to the input end of the water return valve through a pipeline.

[0013] Preferably, a side-fixed heat exchange plate is fixedly connected to the outer wall of the external mounting frame; and a built-in heat exchanger is installed inside the side-fixed heat exchange plate.

[0014] Preferably, the temperature sensor is electrically connected to an external control center.

[0015] The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage provided by the present invention has the following beneficial effects: In the present invention, the temperature sensor detects the internal temperature of the device in real time and is electrically connected to the external control center. When the internal temperature of the device is too high, the control center automatically opens the water diversion valve according to the feedback from the temperature sensor, so that the circulating water after heat exchange flows into the built-in heat exchanger. The built-in heat exchanger reduces the internal temperature of the device by exchanging heat with the air inside the device, thereby realizing intelligent temperature control. This process can not only put the internal structure of the device in a suitable working environment and extend the service life of the equipment, but also effectively avoid energy waste caused by excessive temperature and realize energy-saving operation.

[0016] In addition, the air heat exchange component consisting of the evaporator, carbon dioxide compressor and expansion valve can efficiently pre-treat the inhaled air. The evaporator absorbs heat from the air, the carbon dioxide compressor increases the refrigerant pressure to make energy easier to transmit, and the expansion valve accurately controls the refrigerant flow. This series of operations ensures the efficient absorption and conversion of air energy, provides sufficient energy source for subsequent heating links, and greatly improves the overall heating efficiency of the system.

[0017] In addition, the carbon dioxide-water heat exchanger exchanges heat energy in the air with the return liquid controlled by the pump body. The refrigerant-water heat exchange component assists in circulating the heat exchange liquid. The pump body provides power to ensure stable circulation of the circulating water. The return water tee, water distribution tee and other components work together to accurately transport the hot circulating water to the terminal heat dissipation component to achieve efficient heating. This precise heating cycle design ensures that the heat can be evenly and stably distributed to each indoor heat dissipation terminal, thereby improving the stability and comfort of the heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0020] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0021] In the attached picture: Figure 1 A schematic diagram of a three-dimensional assembly structure according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of a bottom-up structure of a three-dimensional assembly according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of a carbon dioxide heat pump heating process according to an embodiment of the present invention is shown; Figure 4 A schematic diagram of a side-fixed heat exchange plate assembly structure according to an embodiment of the present invention is shown.

[0022] Reference numerals list 1. Air heat exchange component; 101. Evaporator; 102. Carbon dioxide compressor; 103. Expansion valve; 104. Carbon dioxide-water heat exchanger; 2. Refrigerant-water heat exchange component; 201. Pump body; 202. Return valve; 203. Water diversion valve; 204. Return tee; 205. Water diversion tee; 3. Terminal heat dissipation component; 301. Floor heating radiator; 302. Wall radiator; 303. Wall-mounted radiator; 4. Built-in heat exchanger; 5. External mounting frame; 6. Partition plate; 7. Side fixed heat exchange plate; 8. Temperature sensor. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings and examples.

[0024] Example 1: Please refer to Figures 1 to 4The present invention proposes a solar photovoltaic-carbon dioxide heat pump heating system for storing energy across seasons, comprising: an air heat exchange component 1, a refrigerant-water heat exchange component 2 and a terminal heat dissipation component 3; the air heat exchange component 1 comprises an evaporator 101; the air heat exchange component 1 is used to absorb the air while pre-treating the inhaled air through the evaporator 101, the carbon dioxide compressor 102 and the expansion valve 103 to assist in the transmission and processing of the air energy; the head end of the evaporator 101 is connected to the carbon dioxide compressor 102 through a pipeline; the evaporator 101 is connected to the inlet end of the carbon dioxide compressor 102; the evaporator 101 and the carbon dioxide compressor 102 are used to assist in pre-processing the inhaled air to facilitate later use; the outlet end of the carbon dioxide compressor 102 is connected to the carbon dioxide-water heat exchanger 104 through a pipeline; the carbon dioxide-water heat exchanger 104 is provided with an air pipe and a water pipe; the carbon dioxide-water heat exchanger 104 is used to replace the heat energy in the air with the reflux liquid controlled by the pump body 201, thereby assisting in heat supply processing to the terminal heat dissipation component 3; the refrigerant-water heat exchange component 2 includes a pump body 201; the refrigerant-water heat exchange component 2 is used to assist in circulating the heat exchange liquid to assist in heat dissipation to the terminal Component 3 performs heat treatment to facilitate its use; the water outlet end of the pump body 201 is connected to the input end of the water pipe of the carbon dioxide-water heat exchanger 104 through a pipeline; the pump body 201 is used to provide power for circulating water to facilitate the control of circulating water for circulating treatment; the output end of the water pipe of the carbon dioxide-water heat exchanger 104 is connected to the return water tee 204 through a pipeline; the output end of the water pipe of the carbon dioxide-water heat exchanger 104 is connected to the input port of the return water tee 204; the return water tee 204 is used to assist in connecting the carbon dioxide-water heat exchanger 104, the return water valve 202 and the built-in heat exchanger 4 for connection processing, so as to facilitate The hot circulating water can be transported and processed for easy use; a built-in heat exchanger 4 is provided on the outside of the air heat exchange component 1 and the refrigerant-water heat exchange component 2; an external mounting frame 5 is provided on the outside of the air heat exchange component 1 and the refrigerant-water heat exchange component 2; the external mounting frame 5 is used to assist in the installation and fixation of other structures of the device to facilitate the overall stability of the device for easy use; a partition plate 6 is fixedly connected to the middle position of the external mounting frame 5; the partition plate 6 is used to divide the space of the external mounting frame 5 to assist in the installation of other structures of the device for easy use; a temperature sensor 8 is fixedly connected to the bottom of the partition plate 6.

[0025] Embodiment 2: Based on Embodiment 1, Figures 1 to 4As shown, the tail end of the evaporator 101 is connected to the expansion valve 103 through a pipeline; the evaporator 101 is connected to the output end of the expansion valve 103; the expansion valve 103 is used to assist in the transportation and processing of the refluxed gas to facilitate its use; the carbon dioxide compressor 102 is connected to the input end of the gas transmission pipe of the carbon dioxide-water heat exchanger 104; the output end of the gas transmission end of the carbon dioxide-water heat exchanger 104 is connected to the input end of the expansion valve 103 through a pipeline; the branching point of the return water tee 204 is connected to the return water valve 202 through a pipeline; the branching point of the return water tee 204 is connected to the output end of the return water valve 202; the return water valve 202 is used to control the output end of the built-in heat exchanger 4 to be connected to the return water tee 204, so as to facilitate the built-in heat exchanger 4 is circulated; the water inlet end of the pump body 201 is connected to the water dividing tee 205 through a pipeline; the water inlet end of the pump body 201 is connected to the output port of the water dividing tee 205; the water dividing tee 205 is used to connect the water dividing valve 203, the pump body 201 and the internal heat exchanger 4 to facilitate the transportation and treatment of the circulating water after the heat exchange, so as to facilitate its use, thereby assisting the circulating water to be circulated; the branching port of the water dividing tee 205 is connected to the water dividing valve 203 through a pipeline; the branching port of the water dividing tee 205 is connected to the input end of the water dividing valve 203; the water dividing valve 203 and the return valve 202 are respectively electrically connected to the external control center; the water dividing valve 203 is used to control the central control when the temperature inside the device is too high. It is turned on so that the circulating water after heat exchange is transported to the built-in heat exchanger 4, so that heat exchange is performed when it circulates in the built-in heat exchanger 4, thereby cooling the internal temperature of the device for convenient use; the terminal heat dissipation component 3 includes a floor heating radiator 301, a wall radiator 302 and a wall-mounted radiator 303; the terminal heat dissipation component 3 is used to perform heat exchange on the heat carried by the circulating water to assist in raising the indoor temperature for convenient use; the output port of the return water tee 204 is connected to the water inlet of the floor heating radiator 301, the wall radiator 302 and the wall-mounted radiator 303 through pipes respectively; the input port of the water distribution tee 205 is connected to the floor heating radiator 301, the wall radiator 302 and the wall-mounted radiator 303 through pipes respectively The outlet of the heat exchanger 303 is connected; the floor heating radiator 301, the wall radiator 302 and the wall-mounted radiator 303 are used to provide heat to the room to increase the indoor temperature; the input port of the built-in heat exchanger 4 is connected to the output end of the water diversion valve 203 through a pipeline; the output port of the built-in heat exchanger 4 is connected to the input end of the return valve 202 through a pipeline; the built-in heat exchanger 4 is used to allow the circulating water after heat exchange to flow through after the return valve 202 and the water diversion valve 203 are connected, so as to facilitate heat exchange treatment of the high temperature of the internal space of the device, thereby reducing the temperature of the internal space of the device, so that the internal structure of the device works in a suitable environment; the outer wall of the external mounting frame 5 is fixedly connected with a side fixed heat exchange plate 7; the internal part of the side fixed heat exchange plate 7 is installed with the built-in heat exchanger 4;The side fixed heat exchange plate 7 is used to assist in the installation of the internal heat exchanger 4, so that it can maintain stability during the heat exchange process; the temperature sensor 8 is electrically connected to the external control center; the temperature sensor 8 is used to detect the temperature of the internal space of the device, so as to facilitate the external control center to control the return valve 202 and the water diversion valve 203, so that the circulating water can be circulated, so as to cooperate with the internal heat exchanger 4 for heat exchange, so as to facilitate its use. ;

[0026] Specific usage and function of this embodiment: In the present invention, the system is started, the air heat exchange component 1 starts to work, the outside air is sucked in, the evaporator 101 absorbs the heat in the air, and the carbon dioxide refrigerant evaporates and gasifies. The carbon dioxide compressor 102 compresses the gasified carbon dioxide refrigerant to increase its pressure and temperature for energy transmission. The expansion valve 103 throttles and reduces the pressure of the high-pressure liquid carbon dioxide returning from the carbon dioxide-water heat exchanger 104, so that it becomes a low-pressure and low-temperature gas-liquid mixed state, and enters the evaporator 101 again to complete a cycle, realizing energy collection and pretreatment of the inhaled air. The pretreated high-temperature and high-pressure carbon dioxide refrigerant enters the carbon dioxide-water heat exchanger 104, where it is replaced with the reflux liquid controlled by the pump body 201. The heat is transferred from the carbon dioxide refrigerant to the circulating water, so that the temperature of the circulating water increases. The pump body 201 provides power to push the circulating water through the pipeline to the return water tee 204, and the return water tee 204 will The hot circulating water is distributed to the floor heating radiator 301, the wall radiator 302 and the wall-mounted radiator 303 of the terminal heat dissipation component 3. The circulating water releases heat in these heat dissipation components to increase the indoor temperature. The circulating water after heat dissipation flows back to the pump body 201 through the water diversion tee 205 to complete a heating cycle. The temperature sensor 8 monitors the temperature of the internal space of the device in real time and feeds back the temperature data to the external control center. When the temperature inside the device is too high, the control center issues an instruction to open the water diversion valve 203. The circulating water after heat exchange enters the built-in heat exchanger 4 through the water diversion valve 203, circulates in the built-in heat exchanger 4, exchanges heat with the air inside the device, and reduces the temperature inside the device. When the temperature drops to a suitable range, the control center controls the water diversion valve 203 to close. At the same time, the return valve 202 controls the circulation of water inside the built-in heat exchanger 4 according to the instruction of the control center, ensuring that the built-in heat exchanger 4 can efficiently exchange heat and maintain the internal structure of the device in a suitable working environment.

[0027] In this article, there are a few points to note: 1. The drawings of the embodiments of the present disclosure only involve structures related to the embodiments of the present disclosure, and other structures may refer to general designs.

[0028] 2. In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0029] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. Solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage, including: An air heat exchange component (1), a refrigerant-water heat exchange component (2) and a terminal heat dissipation component (3); characterized in that: The air heat exchange component (1) comprises an evaporator (101); The head end of the evaporator (101) is connected to a carbon dioxide compressor (102) via a pipeline; the evaporator (101) is connected to the inlet end of the carbon dioxide compressor (102); The outlet end of the carbon dioxide compressor (102) is connected to a carbon dioxide-water heat exchanger (104) via a pipeline; the carbon dioxide-water heat exchanger (104) is provided with an air delivery pipe and a water delivery pipe; The refrigerant-water heat exchange component (2) comprises a pump body (201); The water outlet end of the pump body (201) is connected to the input end of the water pipe of the carbon dioxide-water heat exchanger (104) via a pipeline; The output end of the water pipe of the carbon dioxide-water heat exchanger (104) is connected to a water return tee (204) via a pipeline; the output end of the water pipe of the carbon dioxide-water heat exchanger (104) is connected to the input port of the water return tee (204); The air heat exchange component (1) and the refrigerant-water heat exchange component (2) are externally provided with a built-in heat exchanger (4); The air heat exchange component (1) and the refrigerant-water heat exchange component (2) are provided with an external mounting frame (5) outside; A partition plate (6) is fixedly connected to the middle position of the external mounting frame (5); A temperature sensor (8) is fixedly connected to the bottom of the partition plate (6).

2. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 1 is characterized in that: The tail end of the evaporator (101) is connected to an expansion valve (103) via a pipeline; the evaporator (101) is connected to the output end of the expansion valve (103).

3. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 2 is characterized in that: The carbon dioxide compressor (102) is connected to the input end of the gas transmission pipe of the carbon dioxide-water heat exchanger (104); the output end of the gas transmission end of the carbon dioxide-water heat exchanger (104) is connected to the input end of the expansion valve (103) via a pipeline.

4. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 1 is characterized in that: The branching port of the water return tee (204) is connected to the water return valve (202) via a pipeline; the branching port of the water return tee (204) is connected to the output end of the water return valve (202).

5. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 4 is characterized in that: The water inlet end of the pump body (201) is connected to a water diversion tee (205) via a pipeline; the water inlet end of the pump body (201) is connected to the output port of the water diversion tee (205); The branching port of the water-dividing tee (205) is connected to a water-dividing valve (203) via a pipeline; the branching port of the water-dividing tee (205) is connected to an input end of the water-dividing valve (203); and the water-dividing valve (203) and the return valve (202) are respectively electrically connected to an external control center.

6. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 5 is characterized in that: The terminal heat dissipation component (3) comprises a floor heating radiator (301), a wall radiator (302) and a wall-mounted radiator (303); The output port of the water return tee (204) is connected to the water inlets of the floor heating radiator (301), the wall radiator (302) and the wall-mounted radiator (303) through pipes; the input port of the water distribution tee (205) is connected to the water outlets of the floor heating radiator (301), the wall radiator (302) and the wall-mounted radiator (303) through pipes.

7. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 5 is characterized in that: The input port of the built-in heat exchanger (4) is connected to the output end of the water diversion valve (203) via a pipeline; and the output port of the built-in heat exchanger (4) is connected to the input end of the water return valve (202) via a pipeline.

8. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 1 is characterized in that: A side-fixed heat exchange plate (7) is fixedly connected to the outer wall of the external mounting frame (5); and an internal heat exchanger (4) is installed inside the side-fixed heat exchange plate (7).

9. The solar photovoltaic-carbon dioxide heat pump heating system with cross-seasonal energy storage according to claim 1 is characterized in that: The temperature sensor (8) is electrically connected to an external control center.

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