Multi-source heat pump air conditioner

Abstract

The invention provides a multi-source heat pump air conditioner which comprises a ground source circulating pump, a heat exchanger and an energy storage tank, and the ground source circulating pump drives a working medium to exchange heat with a medium in the energy storage tank through the heat exchanger; a ground source circulating pipeline for exchanging heat with underground water is arranged in the underground well, and the ground source circulating pump is connected with the ground source circulating pipeline; heat exchange energy storage circulation is formed between the heat exchanger and the energy storage tank through a heat storage circulating pump and a pipeline switched by a valve group; the heat exchanger and the air conditioner terminal form a refrigeration / heating cycle through the heat storage circulating pump and the pipeline switched by the valve group; and the energy storage tank and the air conditioner terminal form an energy storage refrigeration / heating cycle through the heat supply circulating pump and the pipeline switched by the valve group. According to the multi-path heat exchange circulation structure, a circulation loop can be constructed with the energy storage tank, and the effect of energy peak shaving and valley filling is achieved. And the energy storage tank is arranged, so that redundant energy in the ground source circulation pipeline can be stored, and the energy can be released in the peak period of demand. And by regulating the pressure of the ground source circulation pipeline, the energy consumption is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated energy air conditioning, in particular to a multi-source heat pump air conditioning. Background Art

[0002] A ground-source heat pump (GSHP) air conditioning system utilizes the stable temperature of the underground constant temperature layer to achieve efficient cooling and heating. It utilizes an underground well and piping within it, connected to a heat pump, to achieve energy exchange. The temperature of the underground soil or groundwater is relatively stable, lower than the surface air temperature in summer and higher than it in winter. In heating mode, in winter, the heat pump absorbs heat from the groundwater in the well, raising it to a higher temperature. This heat is then transferred to the interior spaces to provide heating. In cooling mode, in summer, the heat pump exchanges heat with the groundwater in the well, lowering the indoor temperature and achieving a cooling effect. To achieve even better results, existing technologies have also incorporated refrigerants into the heat exchange, leveraging the refrigerant's phase change to achieve better heat transfer. However, this solution requires the compressor to operate continuously, which increases energy consumption. For example, Chinese patent document CN207035371U describes a composite heat pump air conditioning system based on an environmentally friendly low-temperature refrigerant. Furthermore, the heat capacity of the underground well has a certain range, requiring recovery time after continuous heat exchange. Due to the temperature difference between day and night, the surface of buildings, especially the glass curtain wall structure, absorbs solar energy, and this energy is not fully utilized. Summary of the Invention

[0003] The technical problem to be solved by this invention is to provide a multi-source heat pump air conditioner that can fully utilize the temperature difference between the underground well and the building interior to achieve highly efficient cooling / heating effects. It can store the energy generated by the heat pump during peak heat capacity periods and release it during low heat capacity periods. In a preferred embodiment, it can fully utilize the heat energy generated by the building during peak solar activity and also utilize flowing water to cool the building surface. This can also reduce the continuous operating time of the compressor.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a multi-source heat pump air conditioner, comprising a ground source circulation pump, a heat exchanger and an energy storage tank, wherein the ground source circulation pump drives the working medium to exchange heat with the medium in the energy storage tank through the heat exchanger; A ground source circulation pipeline for exchanging heat with groundwater is provided in the underground well, and a ground source circulation pump is connected to the ground source circulation pipeline; The heat exchanger forms a heat exchange and energy storage cycle with the energy storage tank through the heat storage circulation pump and the pipeline switched by the valve group; The heat exchanger forms a cooling / heating cycle with the air conditioning terminal through the heat storage circulation pump and the pipeline switched by the valve group; The energy storage tank forms an energy storage cooling / heating cycle with the air conditioning terminal through the heating circulation pump and the pipeline switched by the valve group.

[0005] In a preferred solution, a solar heat exchange panel is further provided, which is installed on the outer wall of the building and has a hollow glass cavity; The solar heat exchange plate forms a solar heat exchange energy storage cycle with the energy storage tank through the solar heat exchange circulation pump and the pipeline switched by the valve group; The solar heat exchange panels form a solar heat exchange cooling / heating cycle with the air conditioning terminal through a solar heat exchange circulation pump and / or a heating circulation pump and a pipeline switched by a valve group.

[0006] In a preferred solution, a solar heat absorption layer is provided on the side of the glass cavity facing the outer wall of the building.

[0007] In a preferred embodiment, the solar heat absorption layer is a liquid crystal dimming film, an electrochromic film or a suspended particle board that is electrically controlled to be turned on and off; Liquid crystal dimming film switches between transparent and black through electrical control; Electrochromic films switch between transparent and dark colors through electrical control; The suspended particle board adjusts the transparency by controlling the transmittance of light.

[0008] In the preferred solution, a centrifuge and a boiler are further provided, and the centrifuge and the boiler form an active heat exchange energy storage cycle with the energy storage tank through an active circulation pump and a pipeline switched by a valve group; The centrifuge and the boiler form an active heat exchange cycle with the air conditioning terminal through an active circulation pump and pipelines switched by a valve group.

[0009] In a preferred solution, the ground source circulation pump is arranged on a ground source circulation pipeline, part of which is located in an underground well to exchange heat with groundwater, and the ground source circulation pipeline is connected to the shell side of the heat exchanger.

[0010] In a preferred solution, the boiling temperature of the working medium in the ground source circulation pipeline is between 10°C and 40°C, and a pressure regulating device is provided to adjust the boiling temperature of the working medium by adjusting the pressure in the ground source circulation pipeline.

[0011] In a preferred embodiment, the pressure regulating device includes a plunger pump driven by a driving device, the plunger pump is provided with a liquid inlet check valve and a liquid discharge check valve, and the liquid inlet check valve and the liquid discharge check valve are connected to the working fluid storage tank and the ground source circulation pipeline through multiple pressure regulating valve groups; The combination of multiple pressure regulating valve groups is used to switch between the pressure-increasing and pressure-reducing working conditions for the ground source circulation pipeline.

[0012] In a preferred solution, there are multiple underground wells, and the working or stopping conditions of each underground well are switched by valves.

[0013] In a preferred solution, there are multiple energy storage tanks, and the energy storage and release working conditions of each energy storage tank are switched by a valve.

[0014] The present invention provides a multi-source heat pump air conditioner, which has the following beneficial effects compared with the prior art: 1. The energy storage tank provided in the present invention can enable the ground source circulation pump to work continuously and store the excess energy in the ground source circulation pipeline, releasing the energy during peak demand periods, thereby fully improving the cooling / heating efficiency of the ground source circulation pipeline, especially making full use of the efficiency of heat exchange between the ground source circulation pipeline and groundwater.

[0015] 2. The solar heat exchange panels of this invention utilize solar energy to heat the liquid within the glass cavity, raising its temperature and achieving heating. They also store excess heat generated during peak solar activity in a storage tank, releasing it when needed. The flowing liquid can also remove heat from the building surface, enhancing air conditioning effectiveness. The solar heat absorption layer can switch between heat absorption and emission modes, absorbing heat when needed and reflecting sunlight through the internal liquid when not needed.

[0016] 3. The present invention is also provided with a centrifuge and a boiler, which are used for active cooling or heating respectively to make up for the situation where the ground source heat pump has insufficient power.

[0017] 4. The present invention adopts a solution of regulating the pressure of the entire ground-source circulation pipeline, so that the ground-source circulation pipeline operates within the optimal phase change temperature range, making full use of the temperature difference between groundwater and ground buildings to perform evaporation-condensation cycle heat exchange, which greatly reduces energy consumption compared with the continuous compression working mode.

[0018] 5. The multi-path heat exchange cycle of the present invention can form a circulation loop with the energy storage tank to achieve the effect of energy peak-shaving and valley-filling. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and examples: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a structural schematic diagram of the voltage regulating device of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the solar heat exchange panel of the present invention.

[0022] In the figure, a centrifuge 1, a boiler 2, a solar heat exchange plate 3, a solar heat absorption layer 31, a glass cavity 32, a liquid inlet 33, a liquid discharge port 34, a heat exchanger 4, a first energy storage tank 5, a second energy storage tank 6, a heating circulation pump 7, an active circulation pump 8, a solar heat exchange circulation pump 9, an air conditioning terminal 10, a ground source circulation pump 11, a first underground well 12, a second underground well 13, a working fluid storage tank 14, a pressure regulating device 15, a driving device 151, a plunger pump 152, a first pressure regulating valve 153, a second pressure regulating valve 154, a liquid inlet check valve 155, a liquid discharge check valve 156, a third pressure regulating valve 157, a fourth pressure regulating valve 158, a first valve 101, a second valve 102, a third valve 103, a fourth valve 104, a fifth valve 105, a sixth valve 106, a seventh valve 107, an eighth valve 108, and a heat storage circulation pump 109 are shown. DETAILED DESCRIPTION

[0023] Example 1: like Figure 1 In the embodiment, a multi-source heat pump air conditioner comprises a ground source circulation pump 11, a heat exchanger 4 and an energy storage tank. The ground source circulation pump 11 drives the working medium to exchange heat with the medium in the energy storage tank through the heat exchanger 4. A ground source circulation pipeline for exchanging heat with groundwater is provided in the underground well, and a ground source circulation pump 11 is connected to the ground source circulation pipeline; The heat exchanger 4 forms a heat exchange and energy storage cycle with the energy storage tank through the heat storage circulation pump 109 and the pipeline switched by the valve group; Figure 1 In the process, the sixth valve 106 is closed, and the fifth valve 105, the seventh valve 107, the third valve 103, the eighth valve 108 and the ninth valve 110 are opened to realize the heat exchange energy storage cycle; preferably, there are multiple energy storage tanks, for example Figure 1 The energy storage states of the first energy storage tank 5 and the second energy storage tank 6 can be switched by switching the on / off states of the two valve groups, the fifth valve 105 and the eighth valve 108 or the seventh valve 107 and the ninth valve 110.

[0024] The heat exchanger 4 forms a cooling / heating cycle with the air-conditioning terminal 10 through the heat storage circulation pump 109 and the pipeline switched by the valve group; this cycle refers to the cooling / heating cycle between the circulation pipeline driven by the heat storage circulation pump 109 and the air-conditioning terminal 10. In winter, the temperature in the underground well is higher than the ground ambient temperature. At this time, the temperature of the heat exchanger 4 is higher than the ground ambient temperature, and the cycle is a heating cycle; while in summer, the temperature in the underground well is lower than the ground ambient temperature. At this time, the temperature of the heat exchanger 4 is lower than the ground ambient temperature, and the cycle is a cooling cycle. In the preferred solution, since the heat capacity in the underground well is limited, it needs to be restored through heat exchange between groundwater and the earth after a period of use. Therefore, the underground well is set to be multiple, for example Figure 1The first and second underground wells 12, 13 in the figure are switched in their operating states by valves (not shown). During operation, the fifth valve 105, the seventh valve 107, the eighth valve 108, and the ninth valve 110 are closed, the third valve 103 and the sixth valve 106 are open, and the thermal storage circulation pumps 109 and 7 are activated, establishing a cooling / heating cycle with the air conditioning terminal 10.

[0025] The energy storage tank forms an energy storage cooling / heating cycle through the heating circulation pump 7 and the pipeline switched by the valve group and the air conditioning terminal 10. Figure 1 In the example, after the ground-source circulation pipeline exchanges heat with groundwater in first and second underground wells 12 and 13, ground-source circulation pump 11 drives the working fluid to circulate, exchanging heat within heat exchanger 4. During heating operation, the working fluid within air conditioning terminal 10 condenses and releases heat. During cooling operation, the working fluid within air conditioning terminal 10 evaporates and removes heat. When fifth valve 105, seventh valve 107, eighth valve 108, ninth valve 110, and heat storage circulation pump 109 are opened, and sixth valve 106 is closed, a heat exchange and energy storage cycle is established. When the fifth valve 105, the seventh valve 107, the eighth valve 108, and the ninth valve 110 are closed, the heat storage circulation pump 109 and the heating circulation pump 7 are turned on, and the sixth valve 106 is turned on, a geothermal direct cooling / heating cycle is formed; when the heating circulation pump 7 is turned on, the heat storage circulation pump 109 is closed, the fifth valve 105, the seventh valve 107, the eighth valve 108, the ninth valve 110, and the sixth valve 106 are turned on, forming an energy storage cooling / heating cycle, at which time the energy stored in the energy storage tank is used for cooling or heating. Preferably, the outer wall of the energy storage tank is provided with insulation material. Preferably, there are multiple energy storage tanks, such as a first energy storage tank 5 and a second energy storage tank 6, so that each energy storage tank can be placed in a different energy storage or release state.

[0026] Example 2: On the basis of Example 1, Figure 3 In a preferred embodiment, a solar heat exchange panel 3 is further provided. The solar heat exchange panel 3 is mounted on the outer wall of the building and has a hollow glass cavity 32. Preferably, the vacuum glass structure of an existing glass curtain wall can be utilized. After a period of operation, the hollow glass cavity 32 is cleaned with a surfactant.

[0027] The solar heat exchange panels 3 form a solar heat exchange and energy storage cycle with the energy storage tank via the solar heat exchange circulation pump 9 and a pipeline switched by a valve group. When the fifth valve 105, the seventh valve 107, the eighth valve 108, the ninth valve 110, the tenth valve 111, and the solar heat exchange circulation pump 9 are opened, the solar heat exchange and energy storage cycle is completed. The midday sunlight heats the working medium, such as water, and stores it in the energy storage tank. The temperature of the solar-heated water can reach up to 85°C.

[0028] The solar heat exchange panels 3 form a solar heat exchange cooling or heating cycle with the air conditioning terminal 10 through the solar heat exchange circulation pump 9 and / or the heating circulation pump 7 and the pipeline switched by the valve group. When the fifth valve 105, the seventh valve 107, the eighth valve 108, and the ninth valve 110 are closed, and the tenth valve 111, the sixth valve 106, and the solar heat exchange circulation pump 9 are opened, a solar heat exchange direct cooling or heating cycle is established.

[0029] The preferred solution is Figure 3 In the embodiment, a solar heat absorbing layer 31 is provided on the side of the glass cavity 32 facing the outer wall of the building.

[0030] In a preferred embodiment, the solar heat absorption layer 31 is a liquid crystal dimming film, an electrochromic film or a suspended particle board that is electrically controlled to be turned on and off; Liquid crystal dimming film switches between transparent and black through electrical control; The liquid crystal dimming film (PDLC) consists of two layers of transparent conductive film, using an indium tin oxide (ITO)-coated polyethylene terephthalate (PET) film as its substrate. These two conductive films provide a uniform electric field when an external voltage is applied. The liquid crystal and polymer hybrid layer, located between the two transparent conductive films, consists of micron-sized liquid crystal droplets dispersed in a polymer matrix. When no voltage is applied, the liquid crystal molecules align randomly, scattering light and rendering the dimming film opaque. However, when sufficient voltage is applied, the liquid crystal molecules align along the electric field, allowing light to pass through and turning the dimming film transparent. In this example, the liquid crystal structure switches between black and transparent, achieving a switching between heat absorption efficiency. When the liquid crystal dimming film is black, it absorbs heat more easily, heating the working medium within the glass cavity 32. However, when the liquid crystal dimming film is transparent, it is less likely to heat the working medium within the glass cavity 32.

[0031] Electrochromic films switch between transparent and dark colors through electrical control; An electrochromic film is a smart material that changes its color or transparency when a voltage is applied. It consists of an electrochromic layer, an ion conductor / electrolyte layer, a counter electrode layer, and a transparent conductive layer, arranged in sequence. The electrochromic layer causes the color change when a voltage is applied. Common materials include tungsten oxide (WO3) and nickel oxide (NiO). The ion conductor / electrolyte layer allows ions to move under the influence of an electric field, but blocks the flow of electrons. It connects the electrochromic layer and the counter electrode layer and transports ions between them. The counter electrode layer stores ions released from the electrochromic layer and helps restore the original state after the applied voltage is removed. Common materials include iridium oxide (IrO2). The transparent conductive layer uses indium tin oxide (ITO) or fluorine-doped tin oxide (FTO) to provide a current path while maintaining good light transmittance. When the electrochromic film is dark in color, including black, it is easier to absorb heat and heat the working medium in the glass cavity 32 . However, when the electrochromic film is transparent, it is not easy to heat the working medium in the glass cavity 32 .

[0032] The suspended particle board, also known as a suspended particle device, regulates heat absorption by controlling light absorption and reflection. It comprises two transparent substrates with a liquid medium between them. Within the liquid medium lies a suspended particle film, located between two glass or plastic plates. This film contains tiny suspended particles made of a material that responds to changes in an electric field. In this example, the suspended particles are made of a transparent foamed polyurethane material coated with a magnetic material. The outer surface of the transparent foamed polyurethane material is also coated with a black coating. Preferably, the remaining areas are coated with a reflective coating. The suspended particles switch 180° depending on the electric field, causing the suspended particle film to switch between a black coating and a reflective coating. When there is no current, the suspended particles are randomly distributed, reflecting some light. When current flows in a first direction, a vector magnetic field is generated, aligning the suspended particles with the black coating facing outward. When current flows in a second direction, another vector magnetic field is generated, with the reflective coating facing outward, reflecting most light. In this example, when the surface of the solar heat absorption layer 31 appears black, it absorbs sunlight and is used for heating. When the surface of the solar heat absorption layer 31 reflects, it reflects sunlight and reduces the absorption of sunlight. In addition, the flowing liquid can also take away the heat of the solar heat absorption layer 31 for cooling conditions.

[0033] Example 3: On the basis of Examples 1 and 2, the preferred solution is as follows Figure 1 In this example, centrifuge 1 and boiler 2 are also included. These two components form an active heat exchange and energy storage loop with the energy storage tank via an active circulation pump 8 and pipelines switched by a valve block. Centrifuge 1 represents an air conditioner using a centrifugal compressor for compression and cooling. Boiler 2 represents an air conditioner using heating fuel for heating. In this operating mode, sixth valve 106 is closed, while fifth valve 105, seventh valve 107, eighth valve 108, ninth valve 110, first valve 101, and third valve 103 are open, activating active circulation pump 8.

[0034] Centrifuge 1 and boiler 2 form an active heat exchange loop with air conditioning terminal 10 via active circulation pump 8 and piping switched by a valve block. In this operating mode, sixth valve 106 and first valve 101 are open, while third valve 103, fifth valve 105, and seventh valve 107 are closed, starting active circulation pump 8.

[0035] Example 4: On the basis of Examples 1 to 3, or used alone, the preferred solution is as follows Figure 1 In the figure, the ground source circulation pump 11 is arranged on the ground source circulation pipeline, part of which is located in the underground well to exchange heat with groundwater. The ground source circulation pipeline is connected to the shell side of the heat exchanger 4, and the other pipelines are connected to the pipe side of the heat exchanger 4.

[0036] The preferred solution is Figure 2 The boiling temperature of the working fluid in the ground-source circulation pipeline is between 10°C and 40°C. A pressure regulating device 15 is provided to adjust the boiling temperature of the working fluid by regulating the pressure in the ground-source circulation pipeline. The preferred working fluid is ether, or a composite working fluid, such as a mixture of acetone and ether.

[0037] The preferred solution is Figure 2 In the embodiment, the pressure regulating device 15 includes a plunger pump 152 driven by a driving device 151. The plunger pump 152 is provided with a liquid inlet check valve 155 and a liquid discharge check valve 156. The liquid inlet check valve 155 and the liquid discharge check valve 156 are connected to the working fluid storage tank 14 and the ground source circulation pipeline through multiple pressure regulating valve groups; The combination of multiple pressure regulating valve groups is used to switch between the pressure-increasing and pressure-reducing conditions of the ground source circulation pipeline. Figure 2 As shown in , when the second pressure regulating valve 154 and the third pressure regulating valve 157 are opened, the first pressure regulating valve 153 and the fourth pressure regulating valve 158 are closed, forming a boosting condition; when the second pressure regulating valve 154 and the third pressure regulating valve 157 are closed, the first pressure regulating valve 153 and the fourth pressure regulating valve 158 are opened, forming a depressurizing condition.

[0038] In a preferred solution, there are multiple underground wells, for example, a first underground well 12 and a second underground well 13, and the working or stopping conditions of each underground well are switched by valves.

[0039] In a preferred solution, there are multiple energy storage tanks, and the energy storage and release working conditions of each energy storage tank are switched by a valve.

[0040] Example 5: In summary, in Examples 1-4, during use, the building energy load is first calculated based on ambient temperature, meteorological data, energy-consuming equipment, and design values for occupant density, and an energy consumption model for the building energy with a prediction module is constructed. The energy supply equipment in Examples 1-4 is then scheduled based on the energy consumption model to achieve the goals of optimizing economic benefits, overall energy efficiency, and environmental protection. During heating, if the energy consumption model indicates a light load, the solar heat exchange circulation pump 9 is prioritized for both heat supply and heat storage. At night, the heat storage circulation pump 7 uses the first and second energy storage tanks 5 and 6 to store energy for heating. When sunlight is insufficient, the ground source circulation pump 11 is used to supplement the heat supply, either by exchanging heat with the first and second underground wells 12 and 13 for energy storage or direct heat supply. Specifically, the solar heat exchange circulation pump 9 is set as the first priority device for heating, while the ground source circulation pump 11 is set as the second priority device for heating. While sufficient heat is being supplied, excess heat is stored in the first and second energy storage tanks 5 and 6. If the energy consumption model is a heavy load, the boiler 2 is started to assist in heating. According to the demand forecast of the prediction module, when the heating is sufficient, the waste heat is stored in the first energy storage tank 5 and the second energy storage tank 6, so that the boiler 2 can maintain the start or stop for a longer time, avoid frequent start and stop, and reduce the energy consumption of the boiler 2. When cooling, if the energy consumption model is a light load, the solar heat exchange panel 3 is first set to a transparent or reflective mode to reduce the absorption of sunlight, and then the solar heat exchange circulation pump 9 is started to use flowing water to lower the temperature of the building. Start the ground source circulation pump 11 to store energy or directly provide cooling by exchanging heat with the first underground well 12 and the second underground well 13. When cooling, the solar heat exchange circulation pump 9 and the ground source circulation pump 11 are used as parallel refrigeration equipment, and are switched according to parameters such as sunlight exposure and indoor and outdoor temperature differences. If the energy consumption model is a heavy load, the centrifuge 1 is started as an auxiliary refrigeration. According to the demand forecast of the prediction module, when the cooling supply is sufficient, energy is stored in the first energy storage tank 5 and the second energy storage tank 6, so that the centrifuge 1 can be started or stopped for a longer period of time, thereby reducing the energy consumption of the boiler 2.

[0041] In a preferred solution, during the operation of the ground source circulation pump 11, the pressure regulating device 15 is controlled according to the ambient temperature to assist in adjusting the pressure in the ground source circulation pipeline so that the working medium obtains a better evaporation temperature to improve the heat exchange efficiency.

[0042] Through the above method, the present invention can achieve the effects of optimizing economic benefits, comprehensive energy efficiency and green environmental protection.

[0043] Although the present application has been described with reference to specific features and embodiments thereof, it is apparent that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely illustrative of the present application as defined by the appended claims and are deemed to cover any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the scope of the present application. Thus, the present application is intended to include such modifications and variations if they fall within the scope of the claims of the present application and their equivalents.

Claims

1. A multi-source heat pump air conditioner, characterized by: It includes a ground source circulation pump (11), a heat exchanger (4) and an energy storage tank, wherein the ground source circulation pump (11) drives the working medium to pass through the heat exchanger (4) to exchange heat with the medium in the energy storage tank; A ground source circulation pipeline for exchanging heat with groundwater is provided in the underground well, and a ground source circulation pump (11) is connected to the ground source circulation pipeline; The heat exchanger (4) forms a heat exchange and energy storage cycle with the energy storage tank through the heat storage circulation pump (109) and the pipeline switched by the valve group; The heat exchanger (4) forms a cooling / heating cycle with the air conditioning terminal (10) through the heat storage circulation pump (109) and the pipeline switched by the valve group; The energy storage tank forms an energy storage cooling / heating cycle through a heat storage circulation pump (7) and a pipeline switched by a valve group and an air conditioning terminal (10).

2. The multi-source heat pump air conditioner according to claim 1, characterized in that: A solar heat exchange plate (3) is also provided. The solar heat exchange plate (3) is installed on the outer wall of the building. The solar heat exchange plate (3) has a hollow glass cavity (32). The solar heat exchange plate (3) forms a solar heat exchange energy storage cycle between the solar heat exchange circulation pump (9) and the pipeline switched by the valve group and the energy storage tank; The solar heat exchange plate (3) forms a solar heat exchange cooling / heating cycle through a solar heat exchange circulation pump (9) and / or a heat storage circulation pump (7) and a pipeline switched by a valve group and an air conditioning terminal (10).

3. The multi-source heat pump air conditioner according to claim 2, characterized in that: A solar heat absorption layer (31) is provided on the side of the glass cavity (32) facing the outer wall of the building.

4. The multi-source heat pump air conditioner according to claim 3, characterized in that: The solar heat absorption layer (31) is a liquid crystal dimming film, an electrochromic film or a suspended particle board that is electrically controlled to be turned on and off; Liquid crystal dimming film switches between transparent and black through electrical control; Electrochromic films switch between transparent and dark colors through electrical control; The suspended particle board is provided with a liquid medium, and the liquid medium is provided with a plurality of suspended particles. When there is no current, the suspended particles reflect most of the light. When there is current, the suspended particles are arranged neatly to allow light to pass through. A dark heat-absorbing film is provided at the bottom of the suspended particle board.

5. The multi-source heat pump air conditioner according to claim 1 or 2, characterized in that: A centrifuge (1) and a boiler (2) are also provided. The centrifuge (1) and the boiler (2) form an active heat exchange energy storage cycle with the energy storage tank through an active circulation pump (8) and a pipeline switched by a valve group. The centrifuge (1) and the boiler (2) form an active heat exchange cycle with the air conditioning terminal (10) through an active circulation pump (8) and a pipeline switched by a valve group.

6. The multi-source heat pump air conditioner according to any one of claims 1 to 4, characterized in that: The ground source circulation pump (11) is arranged on a ground source circulation pipeline, part of which is located in an underground well to exchange heat with groundwater, and the ground source circulation pipeline is connected to the shell side of the heat exchanger (4).

7. The multi-source heat pump air conditioner according to claim 6, characterized in that: The boiling temperature of the working medium in the ground source circulation pipeline is between 10°C and 40°C. A pressure regulating device (15) is also provided to regulate the boiling temperature of the working medium by regulating the pressure in the ground source circulation pipeline.

8. The multi-source heat pump air conditioner according to claim 7, characterized in that: The pressure regulating device (15) includes a plunger pump (152) driven by a driving device (151), and the plunger pump (152) is provided with a liquid inlet check valve (155) and a liquid discharge check valve (156). The liquid inlet check valve (155) and the liquid discharge check valve (156) are connected to the working fluid storage tank (14) and the ground source circulation pipeline through a plurality of pressure regulating valve groups; The combination of multiple pressure regulating valve groups is used to switch between the pressure-increasing and pressure-reducing working conditions for the ground source circulation pipeline.

9. The multi-source heat pump air conditioner according to claim 6, characterized in that: There are multiple underground wells, and the working or stopping conditions of each underground well are switched by valves.

10. The multi-source heat pump air conditioner according to any one of claims 1 to 4, characterized in that: There are multiple energy storage tanks, and the energy storage and release working conditions of each energy storage tank are switched by valves.

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