Solar energy, air energy and phase change energy storage coupled heat pump unit

Abstract

The application discloses a solar energy, air energy and phase change energy storage coupled heat pump unit which comprises a heat supply pipeline, a circulating heating mechanism and an integrated evaporator, a compressor, a condenser and an expansion valve which are sequentially installed on the heat supply pipeline; the integrated evaporator comprises an insulation shell, a heat absorption glass plate, a lower header tank, an upper header tank and an energy storage heat collecting pipe; the energy storage heat collecting pipe comprises a heat collecting sleeve pipe, an inner heat transfer pipe, a water inlet ring pipe, an upper sealing piston, a lower sealing piston and a limiting piece; air inlets are formed in opposite two side walls of the insulation shell; and the circulating heating mechanism comprises a circulating return pipe, a circulating water supply pipe, a heating water tank and a circulating pump. The heat energy is extracted from the solar energy, the air energy and the phase change energy storage, and is coupled with a water source heat energy unit to provide heating for buildings, so that the sustainable development of energy can be realized; when the water in the heat collecting sleeve pipe is completely frozen, the ice in the heat collecting sleeve pipe is discharged from the heat collecting sleeve pipe, so that the ice melting energy consumption can be reduced, and the subsequent rapid heating for the heat user is facilitated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat pump units, in particular to a solar energy, air energy and phase change energy coupled heat pump unit. BACKGROUND

[0002] With the increasing demand for energy resources, traditional fossil fuel energy has been unable to meet our demand for energy. Therefore, renewable energy has gradually become an important part of the development strategy of countries around the world, and the role of solar energy, phase change energy and air energy has gradually changed from auxiliary energy to main energy, but different types of renewable energy have some limitations in application.

[0003] The solar heating system has the following problems: low solar radiation energy density in winter; solar radiation is limited by natural conditions such as day and night, season, latitude, weather and altitude, resulting in intermittency and instability; the effective working time of the solar collector plate is short; the day and night heat is unbalanced; the initial installation cost is high. Five aspects lead to the fact that the solar heating system cannot be used on a large scale.

[0004] Turning water into ice can release a large amount of heat energy, which is converted by a heat pump unit for building heating, but there are the following problems: low heat exchange efficiency; ice extraction, melting and storage problems. Air energy is greatly affected by the environment, and in the case of-15℃, the heat exchange efficiency is very low.

[0005] It should be noted that the above content belongs to the technical cognition of the inventor and does not necessarily constitute prior art. SUMMARY

[0006] Therefore, it is necessary to provide a solar energy, air energy and phase change energy coupled heat pump unit in view of the above technical problems.

[0007] In order to achieve the above purpose, the present application provides a solar energy, air energy and phase change energy coupled heat pump unit, which comprises a heat supply pipeline; an integrated evaporator, a compressor, a condenser and an expansion valve are sequentially installed on the heat supply pipeline;

[0008] The integrated evaporator comprises a heat preservation shell, a heat absorbing glass plate, a lower header tank, an upper header tank and an energy storage heat collecting pipe, the heat absorbing glass plate is arranged on the upper end face of the heat preservation shell, the heat preservation shell is inclined, the lower end of the heat preservation shell is provided with the lower header tank, the lower header tank is communicated with the output end of the heat supply pipeline, the upper end of the heat preservation shell is provided with the upper header tank, the upper header tank is communicated with the input end of the heat supply pipeline, and a plurality of energy storage heat collecting pipes are arranged in the heat preservation shell;

[0009] The energy storage heat collecting pipe comprises a heat collecting sleeve pipe, an inner heat transfer pipe, a water inlet ring pipe, an upper sealing piston, a lower sealing piston and a limiting piece, air inlets are formed in opposite two side walls of a heat preservation shell, the heat collecting sleeve pipe is obliquely arranged in the heat preservation shell, the oblique upper end of the heat collecting sleeve pipe is in a closed structure, the oblique lower end of the heat collecting sleeve pipe is in an open structure and is sealingly penetrated into a lower collecting box, the oblique lower part of the heat collecting sleeve pipe is provided with a communication port and a water outlet, the upper end of the water outlet sealingly extends out of the heat preservation shell, the oblique upper end of the heat collecting sleeve pipe is provided with the water inlet ring pipe which is in communication with the heat collecting sleeve pipe, the water inlet end of the water inlet ring pipe sealingly extends out of the upper collecting box; the inner heat transfer pipe is sealingly and fixedly arranged in the heat collecting sleeve pipe, the oblique upper end of the inner heat transfer pipe is in communication with the upper collecting box, the upper sealing piston is slidingly sleeved on the inner heat transfer pipe, the upper sealing piston is slidingly and sealingly connected with the inner heat transfer pipe and the heat collecting sleeve pipe, the lower sealing piston is slidingly and sealingly connected with the heat collecting sleeve pipe, the upper sealing piston and the lower sealing piston are fixedly connected through a connecting piece, the limiting piece limits the upper sealing piston and the lower sealing piston in a preset position; when the upper sealing piston and the lower sealing piston are in the preset position, the oblique lower end of the inner heat transfer pipe and the communication port are located between the upper sealing piston and the lower sealing piston, the inner heat transfer pipe is in communication with the lower collecting box through the communication port;

[0010] The circulating heating mechanism comprises a circulating return pipe, a circulating water supply pipe, a heating water tank and a circulating pump, the input end of the circulating return pipe is in communication with each water outlet, the output end of the circulating return pipe is in communication with the heating water tank, the input end of the circulating water supply pipe is in communication with the heating water tank, and the output end of the circulating water supply pipe is in communication with the water inlet end of each water inlet ring pipe.

[0011] Preferably, the water inlet end of the water inlet ring pipe is located at the bottom of the water inlet ring pipe and extends out of the bottom of the upper collecting box; the top of the water inlet ring pipe is further provided with an overflow water outlet which extends out of the top of the upper collecting box.

[0012] Preferably, the circulating heating mechanism further comprises an overflow pipe, the input end of the overflow pipe is in communication with the overflow water outlet of the water inlet ring pipe, the output end of the overflow pipe is in communication with the circulating return pipe, an overflow valve is arranged at the input end of the overflow pipe, and a one-way valve is arranged at the output end of the overflow pipe.

[0013] Preferably, a gas-liquid separator is further arranged on the heat supply pipeline, and the gas-liquid separator is located between the integrated evaporator and the compressor.

[0014] Preferably, a drying filter is further arranged on the heat supply pipeline, and the drying filter is located between the condenser and the expansion valve.

[0015] Preferably, a liquid mirror is further arranged on the heat supply pipeline, and the liquid mirror is located between the condenser and the expansion valve.

[0016] Preferably, a liquid medium temperature sensor, a liquid medium pressure sensor, a medium evaporation temperature sensor, a medium evaporation pressure sensor, a medium condensation temperature sensor and a medium condensation pressure sensor are further arranged on the heat supply pipeline.

[0017] Preferably, the heat preservation shell is provided with a baffle for opening and closing the air port, and a draught fan is arranged in the air port of at least one side wall of the heat preservation shell.

[0018] Preferably, the lower header tank is fixed with a guide sleeve, a limiting piece is slidingly arranged in the guide sleeve, a limiting block is fixed to the end of the lower sealing piston away from the upper sealing piston, a through hole is formed in the limiting block, and the lower end of the limiting piece is inserted into the through hole.

[0019] Preferably, the heat preservation shell is fixed with a support at the bottom.

[0020] Compared with the prior art, the technical scheme has at least the following beneficial effects:

[0021] By extracting heat energy from solar energy, air energy and phase change energy, and coupling with a water source heat energy unit to provide heating for a building, the solar energy, phase change energy and air energy are complementarily utilized, so that the demand of human beings for energy can be maximally met, the dependence on traditional energy is reduced, and the sustainable development of energy is facilitated.

[0022] When the heat source cannot be extracted by solar energy and air energy, the water stored in the heat collecting sleeve pipe can be phase changed to release the solidification latent heat, which is transmitted to the medium in the inner heat transfer pipe, so that the medium in the inner heat transfer pipe is heated, and finally the heat user is provided with heat; the water in the water tank can also be heated by electricity to provide heat energy in an emergency, so as to meet the demand of the heat user.

[0023] When the water in the heat collecting sleeve pipe is completely frozen, the movement of the limiting piece, the upper sealing piston and the lower sealing piston is controlled, the circulating pump is controlled to transport the water in the heating water tank to the heat collecting sleeve pipe, the ice in the heat collecting sleeve pipe is melted and impacted, the ice in the heat collecting sleeve pipe is discharged from the heat collecting sleeve pipe, the ice melting energy consumption is reduced, and the heat supply to the heat user is facilitated. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 FIG. 1 is a structural schematic view of an embodiment of the present application;

[0025] Figure 2 FIG. 2 is a side view of an integrated evaporator of an embodiment of the present application;

[0026] Figure 3 FIG. 3 is a sectional view of a heat preservation shell of an embodiment of the present application;

[0027] 1, heat supply pipeline; 2, integrated evaporator; 3, compressor; 4, condenser; 5, expansion valve; 6, heat preservation shell; 7, heat absorption glass plate; 8, lower header; 9, upper header; 10, energy storage heat collecting pipe; 11, heat collecting jacket pipe; 12, inner heat transfer pipe; 13, water inlet ring pipe; 14, upper sealing piston; 15, lower sealing piston; 16, limiting piece; 17, air port; 18, communication port; 19, water outlet; 20, circulating water outlet pipe; 21, circulating water supply pipe; 22, heating water tank; 23, circulating pump; 24, water outlet valve; 25, overflow pipe; 26, overflow valve; 27, one-way valve; 28, gas-liquid separator; 29, drying filter; 30, liquid sight glass; 31, liquid medium temperature sensor; 32, liquid medium pressure sensor; 33, medium evaporation temperature sensor; 34, medium evaporation pressure sensor; 35, medium condensation temperature sensor; 36, medium condensation pressure sensor; 37, baffle; 38, drainage fan; 39, guide sleeve; 40, limiting block; 41, support. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein, and it is understood that similar modifications of the present application can be constructed by those skilled in the art without departing from the scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0029] Please refer to Figure 1 The embodiment of the present application provides a solar energy, air energy and phase change energy storage coupled heat pump unit, which comprises a heat supply pipeline 1, an integrated evaporator 2, a compressor 3, a condenser 4, an expansion valve 5 and a circulating heating mechanism; the integrated evaporator 2, the compressor 3, the condenser 4 and the expansion valve 5 are sequentially installed on the heat supply pipeline 1;

[0030] The integrated evaporator 2 comprises a heat preservation shell 6, a heat absorption glass plate 7, a lower header 8, an upper header 9 and an energy storage heat collecting pipe 10; the side wall of the heat preservation shell 6 is provided with a heat preservation layer, which has a heat preservation effect; the heat absorption glass plate 7 is arranged on the upper end face of the heat preservation shell 6 and can directly receive solar radiation; the heat preservation shell 6 is arranged obliquely to facilitate light entering; the lower header 8 is installed on the oblique lower end of the heat preservation shell 6 and is in communication with the output end of the heat supply pipeline 1; the upper header 9 is installed on the oblique upper end of the heat preservation shell 6 and is in communication with the input end of the heat supply pipeline 1; and the heat preservation shell 6 is internally provided with a plurality of energy storage heat collecting pipes 10;

[0031] The energy storage heat collecting pipe 10 comprises a heat collecting sleeve pipe 11, an inner heat transfer pipe 12, a water inlet ring pipe 13, an upper sealing piston 14, a lower sealing piston 15 and a limiting piece 16, air inlets 17 are formed on opposite two side walls of the heat preservation shell 6, the heat collecting sleeve pipe 11 is obliquely arranged in the heat preservation shell 6, the oblique upper end of the heat collecting sleeve pipe 11 is in a closed structure, the oblique lower end of the heat collecting sleeve pipe 11 is in an open structure and is sealingly penetrated through the lower collecting tank 8, the oblique lower part of the heat collecting sleeve pipe 11 is provided with a communication port 18 and a water outlet 19, the upper end of the water outlet 19 sealingly extends out of the heat preservation shell 6, the water inlet ring pipe 13 in communication with the heat collecting sleeve pipe 11 is arranged on the oblique upper end of the heat collecting sleeve pipe 11, the water inlet ring pipe is annular and has a plurality of water supplement ports uniformly distributed and in communication with the oblique upper end of the heat collecting sleeve pipe 11, so that the impacting water and the annular end surface of the ice are uniformly contacted when the ice in the heat collecting sleeve pipe 11 is impacted, and the water inlet end of the water inlet ring pipe 13 sealingly extends out of the upper collecting tank 9; the inner heat transfer pipe 12 is sealingly and fixedly arranged in the heat collecting sleeve pipe 11, the oblique upper end of the inner heat transfer pipe 12 is in communication with the upper collecting tank 9, the upper sealing piston 14 is slidingly sleeved on the inner heat transfer pipe 12, the upper sealing piston 14 is slidingly and sealingly connected with the inner heat transfer pipe 12 and the heat collecting sleeve pipe 11, the lower sealing piston 15 is slidingly and sealingly connected with the heat collecting sleeve pipe 11, the upper sealing piston 14 and the lower sealing piston 15 are fixedly connected through a connecting piece, and the limiting piece 16 limits the upper sealing piston 14 and the lower sealing piston 15 in a preset position; when the upper sealing piston 14 and the lower sealing piston 15 are in the preset position, the oblique lower end of the inner heat transfer pipe 12 and the communication port 18 are located between the upper sealing piston 14 and the lower sealing piston 15, and the inner heat transfer pipe 12 is in communication with the lower collecting tank 8 through the communication port 18;

[0032] The circulating heating mechanism comprises a circulating return pipe 20, a circulating water supply pipe 21, a heating water tank 22, a circulating pump 23 and a water outlet valve 24, the input end of the circulating return pipe 20 is in communication with each water outlet 19, the output end of the circulating return pipe 20 is in communication with the heating water tank 22, the input end of the circulating water supply pipe 21 is in communication with the heating water tank 22, the output end of the circulating water supply pipe 21 is in communication with the water inlet end of each water inlet ring pipe 13, and the water outlet valve 24 is arranged on the circulating return pipe 20 close to each water outlet 19, the water in the heat collecting sleeve pipe 11 can be controlled to circulate and flow by opening the water outlet valve 24, and the water in the heat collecting sleeve pipe 11 can be prevented from circulating and flowing by closing the water outlet valve 24.

[0033] The solar energy, air energy and phase change energy storage coupled heat pump unit of the embodiment extracts heat energy from the solar energy, air energy and phase change energy storage, and is coupled with the water source heat energy unit to provide heating for buildings.

[0034] When the sun is shining, on one hand, the solar heat cycle, sunlight penetrates the heat-absorbing glass plate 7 and irradiates on the energy storage heat collecting pipe 10, and the heat collecting sleeve pipe 11 absorbs the solar heat energy; on the other hand, the air energy heat cycle, the outside air flows in the heat preservation shell 6 through the air port 17, and the heat collecting sleeve pipe 11 exchanges heat with the heat energy in the air; the solar heat cycle and the air energy heat cycle both make the water in the heat collecting sleeve pipe 11 warm, and the heat energy is transmitted to the medium flowing in the inner heat transfer pipe 12 through the water, and the medium can be R22 refrigerant; the medium evaporates and becomes low-temperature and low-pressure gas, enters the input end of the heat supply pipeline 1 through the upper header 9, becomes high-temperature and high-pressure gas under the power action of the compressor 3, flows into the condenser 4, exchanges heat with the user side through the fan coil unit in the condenser 4, and releases heat to the heat user through the fan coil; the medium flowing out of the condenser 4 becomes gas-liquid mixture, enters the expansion valve 5, becomes liquid after entering the expansion valve 5, and flows back to the lower header 8, and enters the heat collecting sleeve pipe 11 and the inner heat transfer pipe 12 between the upper sealing piston 14 and the lower sealing piston 15 through the communication port 18, and completes a cycle.

[0035] At night or on cloudy days, and when the outdoor temperature is higher than 0℃, the air energy heat cycle can be carried out alone, or when the outdoor temperature is low and the heat supply efficiency is low and cannot meet the user side, the heated water tank 22 can be used to heat the water to provide emergency heat energy. The heated water tank 22 heats the water inside, the circulating pump 23 sends the water in the heated water tank 22 to the water inlet ring pipe 13 and the heat collecting sleeve pipe 11 through the circulating water supply pipe 21, the water in the heat collecting sleeve pipe 11 exchanges heat with the medium flowing in the inner heat transfer pipe 12, and then enters the circulating return pipe 20 and the heated water tank 22 through the water outlet 19, completes a cycle, and realizes heating of the medium in the inner heat transfer pipe 12 to supply heat to the heat user.

[0036] When the solar energy cannot provide heat energy at night or on cloudy days, the outdoor temperature is lower than 0℃, and the power is off, the water stored in the heat collecting sleeve 11 releases the freezing latent heat to transfer to the medium in the inner heat transfer pipe 12, so as to heat the medium in the inner heat transfer pipe 12 and provide heat for the heat users. After the power is on, the heating water tank 22 is powered to heat the water inside, and the circulating pump 23 sends the water in the heating water tank 22 to the water inlet ring pipe 13 and the heat collecting sleeve 11 through the circulating water supply pipe 21. The water in the heat collecting sleeve 11 exchanges heat with the medium flowing in the inner heat transfer pipe 12, and then enters the circulating return pipe 20, the heating water tank 22 through the water outlet 19, to complete a cycle and heat the medium in the inner heat transfer pipe 12, so as to provide heat for the heat users. If the water in the heat collecting sleeve 11 completely freezes, the control limiting part 16 moves, and the upper sealing piston 14 and the lower sealing piston 15 are no longer limited. The circulating pump 23 sends the water in the heating water tank 22 to the water inlet ring pipe 13 and the heat collecting sleeve 11 through the circulating water supply pipe 21, melts and impacts the ice in the heat collecting sleeve 11, and finally discharges the ice in the heat collecting sleeve 11 from the open end of the heat collecting sleeve 11 under the action of water flow impact force and self weight. Then, the upper sealing piston 14, the lower sealing piston 15 and the limiting part 16 are installed again, and the water is injected into the heat collecting sleeve 11 to provide heat for the heat users. In the case of continuous power failure, the ice in the heat collecting sleeve 11 can be melted by solar energy when there is sunlight during the day.

[0037] In an embodiment, to avoid excessive pressure in the water inlet ring pipe 13 and the heat collecting sleeve 11, the water inlet end of the water inlet ring pipe 13 is located at the bottom of the water inlet ring pipe 13, and the water inlet end of the water inlet ring pipe 13 extends out of the bottom of the upper header tank 9. The water inlet ring pipe 13 is also provided with an overflow water outlet at the top, and the overflow water outlet extends out of the top of the upper header tank 9. When water is injected into the heat collecting sleeve 11 through the water inlet ring pipe 13, especially when the heat collecting sleeve 11 is completely frozen, the pressure in the water inlet ring pipe 13 and the heat collecting sleeve 11 will be too high under the action of the circulating pump 23, and water or gas will be discharged from the overflow water outlet.

[0038] In an embodiment, to avoid waste of water overflowed from the water outlet end, the circulating heating mechanism further comprises an overflow pipe 25, an input end of the overflow pipe 25 being in communication with the water overflow outlet end of the water inlet ring pipe 13, an output end of the overflow pipe 25 being in communication with the circulating return pipe 20, an overflow valve 26 being installed at the input end of the overflow pipe 25, the overflow valve 26 being opened only when the water overflow pressure is greater than a preset value, so as to ensure that the water supply pressure of the heat collecting sleeve pipe 11 is not too low, a one-way valve 27 being installed at the output end of the overflow pipe 25, the one-way valve 27 being able to avoid water flowing into the overflow pipe 25. When the pressure in the water inlet ring pipe 13 and the heat collecting sleeve pipe 11 is greater than the preset opening pressure of the overflow valve 26, the water overflowed from the water outlet end enters the overflow pipe 25, the circulating return pipe 20 and the heating water tank 22, so as to realize the recycling of the overflowed water. Especially during ice melting and ice removal, the circulating pump 23 and the heater in the heating water tank 22 can be directly opened without moving the limiting member 16, the upper sealing piston 14 and the lower sealing piston 15, the circulating pump 23 sends the water in the heating water tank 22 to the water inlet ring pipe 13 and the heat collecting sleeve pipe 11 through the circulating water supply pipe 21, so as to melt and impact the ice in the heat collecting sleeve pipe 11. Due to the blockage of the ice, the water pressure in the water inlet ring pipe 13 and the heat collecting sleeve pipe 11 increases, the water is overflowed from the water outlet end, enters the overflow pipe 25, the circulating water supply pipe 21 and the heating water tank 22, so as to realize the recycling of the water. When the outer wall of the ice block in contact with the heat collecting sleeve pipe 11 and the inner wall in contact with the inner heat transfer pipe 12 are melted, the water can be discharged from the water outlet 19 and returned to the heating water tank 22, at this time, the circulating pump 23 can be closed, the limiting member 16 is operated, then the upper sealing piston 14 and the lower sealing piston 15 are taken out of the heat collecting sleeve pipe 11, under the action of gravity, the ice in the heat collecting sleeve pipe 11 is automatically discharged from the open end of the heat collecting sleeve pipe 11, if the ice block cannot be automatically discharged, the circulating pump 23 can be opened again to use the water pressure to flush out the ice block.

[0039] In an embodiment, the heating pipe 1 is further provided with a gas-liquid separator 28, the gas-liquid separator 28 being located between the integrated evaporator 2 and the compressor 3. The gas-liquid separator 28 can separate the liquid medium, so as to avoid the liquid medium entering the compressor 3.

[0040] In an embodiment, the heating pipe 1 is further provided with a drying filter 29, the drying filter 29 being located between the condenser 4 and the expansion valve 5. The drying filter 29 can dry the medium, so as to facilitate the liquid medium entering the expansion valve 5.

[0041] In an embodiment, the heating pipe 1 is further provided with a liquid sight glass 30, the liquid sight glass 30 being located between the condenser 4 and the expansion valve 5. The liquid sight glass 30 is provided to facilitate the naked eye to observe the state of the medium in the heating pipe 1.

[0042] In an embodiment, the heat supply pipeline 1 is further provided with a liquid medium temperature sensor 31, a liquid medium pressure sensor 32, a medium evaporation temperature sensor 33, a medium evaporation pressure sensor 34, a medium condensation temperature sensor 35 and a medium condensation pressure sensor 36. The liquid medium temperature sensor 31 and the liquid medium pressure sensor 32 are arranged between the expansion valve 5 and the integrated evaporator 2, the liquid medium temperature sensor 31 detects the temperature in the heat supply pipeline 1 at this position, and the liquid medium pressure sensor 32 detects the pressure in the heat supply pipeline 1 at this position; the medium evaporation pressure sensor 34 is arranged between the gas-liquid separator 28 and the compressor 3, and detects the pressure in the heat supply pipeline 1 at this position; the medium condensation temperature sensor 35 and the medium condensation pressure sensor 36 are arranged between the compressor 3 and the condenser 4, the medium condensation temperature sensor 35 detects the temperature in the heat supply pipeline 1 at this position, and the medium condensation pressure sensor 36 detects the pressure in the heat supply pipeline 1 at this position.

[0043] In an embodiment, the heat preservation shell 6 is provided with a baffle 37 for opening and closing the air port 17, and a guide fan 38 is arranged in the air port 17 of at least one side wall of the heat preservation shell 6. The baffle 37 can be arranged on the heat preservation shell 6 in various ways to open and close the air port 17, for example, the baffle 37 is arranged on the heat preservation shell 6 through a torsion hinge, and in a natural state, the baffle 37 opens the air port 17 under the action of the torsion hinge; a quick clamp or other locking device is arranged on the baffle 37 and the heat preservation shell 6, and the baffle 37 can close the air port 17 through the quick clamp or other locking device. When the outdoor temperature is too low and it is not suitable to carry out air energy circulation, the baffle 37 is controlled to close the air port 17, so that the heat preservation shell 6 is heat preserved.

[0044] In an embodiment, in order to facilitate the installation of the limiting piece 16, a guide sleeve 39 is arranged on the lower header tank 8, the limiting piece 16 is slidingly inserted into the guide sleeve 39, a limiting block 40 is fixed to the end of the lower sealing piston 15 away from the upper sealing piston 14, a through hole is formed in the limiting block 40, and the lower end of the limiting piece 16 is inserted into the through hole. The limiting piece 16 can be a pin, the guide sleeve 39 plays a guiding and limiting role on the limiting piece 16, the limiting piece 16 is inserted into the through hole to limit the limiting block 40, the lower sealing piston 15 and the upper sealing piston 14, so as to avoid the axial movement of the lower sealing piston 15 and the upper sealing piston 14 in the heat collecting sleeve 11.

[0045] In an embodiment, in order to facilitate the support of the heat preservation shell 6 and the smooth discharge of the ice blocks in the heat collecting sleeve 11, a support 41 is arranged on the bottom of the heat preservation shell 6. The support 41 can support the heat preservation shell 6 at a high position, so as to facilitate the smooth discharge of the ice blocks in the heat collecting sleeve 11, and avoid the situation that the upper end of the ice blocks is still partially in the heat collecting sleeve 11 after the lower end of the ice blocks touches the ground.

[0046] The above embodiments are all provided with control cabinets, which control the electric components such as the compressor 3, and adjust the on-off degree of each system according to the temperature and pressure changes detected by the temperature sensors and pressure sensors, so as to achieve intelligent monitoring.

[0047] The technical features of the above embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that it is within the scope of the description.

[0048] The above embodiments only express several implementation manners of the present application, the description is more specific and detailed, but it cannot be understood as the limitation of the patent scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

[0049] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0051] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A coupled heat pump unit combining solar energy, air energy, and phase change energy storage, characterized in that, It includes a heating pipeline (1); an integrated evaporator (2), a compressor (3), a condenser (4) and an expansion valve (5) are installed sequentially on the heating pipeline (1); The integrated evaporator (2) includes an insulation shell (6), a heat-absorbing glass plate (7), a lower header (8), an upper header (9), and energy storage heat collection tubes (10). The heat-absorbing glass plate (7) is disposed on the upper end face of the insulation shell (6). The insulation shell (6) is inclined. The lower header (8) is installed at the lower end of the insulation shell (6). The lower header (8) is connected to the output end of the heating pipeline (1). The upper header (9) is installed at the upper end of the insulation shell (6). The upper header (9) is connected to the input end of the heating pipeline (1). Multiple energy storage heat collection tubes (10) are installed inside the insulation shell (6). The energy storage heat collector tube (10) includes a heat collector sleeve (11), an inner heat transfer tube (12), a water inlet ring pipe (13), an upper sealing piston (14), a lower sealing piston (15), and a limiting member (16). Air vents (17) are provided on both sides of the insulation shell (6). The heat collector sleeve (11) is installed obliquely inside the insulation shell (6). The upper end of the heat collector sleeve (11) is closed, and the lower end of the heat collector sleeve (11) is open and sealed through the lower header (8). The lower part of the heat collector sleeve (11) is provided with a connecting port (18) and a water outlet (19). The upper end of the water outlet (19) extends out of the insulation shell (6) in a sealed manner. The upper end of the heat collector sleeve (11) is equipped with a water inlet ring pipe (13) that communicates with it. The water inlet end of the water inlet ring pipe (13) extends out of the upper header (9) in a sealed manner. The heat collector sleeve (11) is sealed and fixed inside. An inner heat transfer pipe (12) is installed, with its upper end connected to the upper header (9). An upper sealing piston (14) is slidably fitted onto the inner heat transfer pipe (12). The upper sealing piston (14) is slidably sealed to the inner heat transfer pipe (12) and the heat collection sleeve (11). The lower sealing piston (15) is slidably sealed to the heat collection sleeve (11). The upper sealing piston (14) and the lower sealing piston (15) are fixedly connected by a connector. A limiting member (16) restricts the upper sealing piston (14) and the lower sealing piston (15) to a preset position. When the upper sealing piston (14) and the lower sealing piston (15) are in the preset position, the lower end of the inner heat transfer pipe (12) and the connecting port (18) are located between the upper sealing piston (14) and the lower sealing piston (15). The inner heat transfer pipe (12) is connected to the lower header (8) through the connecting port (18). The solar, air and phase change energy storage coupled heat pump unit also includes a circulating heating mechanism, which includes a circulating return pipe (20), a circulating water supply pipe (21), a heating water tank (22), a circulating pump (23) and an outlet valve (24). The input end of the circulating return pipe (20) is connected to each outlet (19), the output end of the circulating return pipe (20) is connected to the heating water tank (22), the input end of the circulating water supply pipe (21) is connected to the heating water tank (22), and the output end of the circulating water supply pipe (21) is connected to the inlet end of each inlet ring pipe (13).

2. The solar, air, and phase change energy storage coupled heat pump unit according to claim 1, characterized in that, The inlet end of the inlet ring pipe (13) is located at its bottom and extends out of the bottom of the upper header (9); the top of the inlet ring pipe (13) is also provided with an overflow outlet end, which extends out of the top of the upper header (9).

3. The solar, air, and phase change energy storage coupled heat pump unit according to claim 2, characterized in that, The circulating heating mechanism also includes an overflow pipe (25), the input end of which is connected to the overflow outlet end of the inlet ring pipe (13), the output end of which is connected to the circulating return pipe (20), an overflow valve (26) is installed at the input end of the overflow pipe (25), and a one-way valve (27) is installed at the output end of the overflow pipe (25).

4. The solar, air, and phase change energy storage coupled heat pump unit according to claim 1, characterized in that, A gas-liquid separator (28) is also installed on the heating pipeline (1), which is located between the integrated evaporator (2) and the compressor (3).

5. The solar, air, and phase change energy storage coupled heat pump unit according to claim 4, characterized in that, A drying filter (29) is also installed on the heating pipeline (1), and the drying filter (29) is located between the condenser (4) and the expansion valve (5).

6. The solar, air, and phase change energy storage coupled heat pump unit according to claim 5, characterized in that, A sight glass (30) is also installed on the heating pipeline (1), and the sight glass (30) is located between the condenser (4) and the expansion valve (5).

7. The solar, air, and phase change energy storage coupled heat pump unit according to claim 6, characterized in that, The heating pipeline (1) is also equipped with a liquid medium temperature sensor (31), a liquid medium pressure sensor (32), a medium evaporation temperature sensor (33), a medium evaporation pressure sensor (34), a medium condensation temperature sensor (35), and a medium condensation pressure sensor (36).

8. The solar, air, and phase change energy storage coupled heat pump unit according to claim 1, characterized in that, The insulation shell (6) is equipped with a baffle (37) for opening and closing the air vent (17), and a duct fan (38) is installed in the air vent (17) on at least one side wall of the insulation shell (6).

9. The solar, air, and phase change energy storage coupled heat pump unit according to claim 1, characterized in that, The lower header (8) is fixed with a guide sleeve (39), and the limiting member (16) is slidably inserted into the guide sleeve (39). The lower sealing piston (15) is fixed with a limiting block (40) at one end opposite to the upper sealing piston (14). The limiting block (40) has a through hole, and the lower end of the limiting member (16) is inserted into the through hole.

10. The solar, air, and phase change energy storage coupled heat pump unit according to claim 1, characterized in that, The bottom of the insulation shell (6) is fixed with a bracket (41).

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