Solar energy-soil source coupling heat pump system with self-heat-storage function

Abstract

The invention discloses a solar energy-soil source coupling heat pump system with a self-heat-storage function, and relates to the technical field of coupling heat pump systems, a buried pipe heat exchanger with the self-heat-storage function is used for capturing heat in the environment, and a current-carrying fluid circulation pipe set of the buried pipe heat exchanger with the self-heat-storage function is used for exchanging heat with a heat exchange loop module; the heat exchange loop module is used for providing heat for a user, the carrier fluid circulation pipe set is arranged close to the heat removal pipe set, the heat removal pipe set is used for capturing heat in soil, the heat removal pipe set can communicate with the heat exchange loop module, and the heat removal pipe set is used for exchanging heat with the heat exchange loop module. The double-working-medium driving device of the ground heat exchanger with the self-heat-storage function can communicate with a heat exchange loop module and a user, can directly provide heat for the user, and can exchange heat with the heat exchange loop module. Heat converted from solar energy or air energy can be autonomously stored in underground soil, other energy consumption is not needed, and heat supply is stable.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coupling heat pump systems, in particular to a solar- soil source coupled heat pump system with self-heat storage function. BACKGROUND

[0002] In recent years, the ground source heat pump technology has been widely used in building heating and cooling fields due to its advantage of "taking heat but not water" through the ground heat exchanger. As the core component of the ground source heat pump system, the ground heat exchanger discharges the heat inside the building to the underground soil which is lower than the atmospheric environment temperature in summer, and takes heat from the underground soil which is higher than the atmospheric environment temperature in winter, and then supplies heat to the building after being lifted by the heat pump unit. However, the traditional ground source heat pump system faces a common and critical technical bottleneck in actual operation, which is the soil heat imbalance problem. When the heat pump unit takes more heat from the underground soil than discharges to the underground soil through the ground heat exchanger, the underground soil will have a "cold accumulation" problem, causing the heating energy efficiency coefficient (COP) of the ground source heat pump system to decrease year by year. If the problem continues to worsen, it will further cause the heat pump unit to stop running and the system to fail to operate normally.

[0003] In order to solve the "cold accumulation" problem of the underground soil, the existing technology generally adopts the following three ways: (1) increasing the volume of the drilling field, which can alleviate the "cold accumulation" problem by increasing the depth and pipe spacing of the ground heat exchanger. This method will greatly increase the land occupation and the initial investment cost of the system, but the improvement effect is limited, especially in areas where land resources are scarce. (2) Setting up an auxiliary heat source to bear part of the heat load. This method can provide part of the heat for the building during the peak period of building heat load or when the soil temperature is too low by setting up a boiler, an electric heater, etc. This method can ensure the stable operation of the heat pump system, but it increases the consumption of additional energy and reduces the energy saving potential of the ground source heat pump system. (3) Setting up a solar collector or an air heat exchanger for cross-season heat storage. This method needs to increase the solar collection system or the air heat exchanger system to store the heat generated by the solar collector and the air in the high-temperature environment in the underground soil through the ground heat exchanger under the drive of the circulating water pump. This method improves the utilization value of renewable energy in building heating, but the circulating water pump of the solar collection system and the air heat exchanger system still consumes about 10-20% of additional electricity.

[0004] In summary, for the buried pipe ground source heat pump system with the problem of "cold accumulation", a compact buried pipe heat exchanger that can independently heat the underground soil is urgently needed. The device itself can store solar energy or low-grade air energy in the underground soil in a "time and space allocation" manner, while avoiding additional energy consumption and stable heating. SUMMARY

[0005] The purpose of the present application is to provide a solar-soil source coupled heat pump system with self-heat storage function to solve the above-mentioned problems existing in the prior art, and to realize the autonomous storage of solar or air energy in the underground soil without other energy consumption and stable heating.

[0006] To achieve the above-mentioned purpose, the present application provides the following scheme: The present application provides a solar-soil source coupled heat pump system with self-heat storage function, comprising a buried pipe heat exchanger with self-heat storage function, a heat extraction pipe group and a heat exchange circuit module. The buried pipe heat exchanger with self-heat storage function is used to capture heat from the environment. The carrier fluid flow pipe group of the buried pipe heat exchanger with self-heat storage function is used to exchange heat with the heat exchange circuit module. The heat exchange circuit module is used to provide heat to the user. The carrier fluid flow pipe group is arranged close to the heat extraction pipe group. The heat extraction pipe group is used to capture heat from the soil. The heat extraction pipe group can communicate with the heat exchange circuit module. The heat extraction pipe group is used to exchange heat with the heat exchange circuit module. The double working medium driving device of the buried pipe heat exchanger with self-heat storage function can communicate with the heat exchange circuit module and the user respectively. The double working medium driving device can directly provide heat to the user. The double working medium driving device can also exchange heat with the heat exchange circuit module.

[0007] Preferably, the buried pipe heat exchanger with self-heat storage function comprises a heat collecting device, the double working medium driving device, the liquid storage device, the cooling device and the carrier fluid flow pipe group, the heat collecting device is used for capturing heat in the environment, the heat collecting device is in communication with the double working medium driving device, and the heat collecting device can exchange heat with the double working medium driving device, the double working medium driving device stores carrier fluid and low-boiling-point working medium, the double working medium driving device is in communication with the liquid storage device, the liquid storage device is in communication with the cooling device, the cooling device is in communication with the double working medium driving device, the low-boiling-point working medium in the double working medium driving device can be vaporized after absorbing heat and enter the liquid storage device, the cooling device can cool the low-boiling-point working medium after vaporization flowing out of the liquid storage device, and the cooled liquid low-boiling-point working medium flows back to the double working medium driving device, the carrier fluid flow pipe group is used for being buried in underground soil and exchanging heat, the double working medium driving device is also in communication with the inlet of the carrier fluid flow pipe group, and the low-boiling-point working medium in the double working medium driving device can make the carrier fluid enter the carrier fluid flow pipe group and release heat after absorbing heat, the outlet of the carrier fluid flow pipe group is in communication with the cooling device, and the carrier fluid after releasing heat can flow through the cooling device and flow back to the double working medium driving device.

[0008] Preferably, the heat collecting device is a solar heat collecting device, the solar heat collecting device comprises an absorbing section and a releasing section in communication with each other, the absorbing section is used for capturing heat in the environment and exchanging heat to the releasing section, and the releasing section is used for exchanging heat with the double working medium driving device. The absorbing section comprises a glass cover plate, an absorbing layer, an insulation layer, a sealing plate, a heat pipe evaporation section and a gas collecting pipe, the glass cover plate, the heat pipe evaporation section, the absorbing layer, the insulation layer and the sealing plate are sequentially stacked from top to bottom, the outlet of the heat pipe evaporation section is in communication with the inlet of the gas collecting pipe, the outlet of the gas collecting pipe is in communication with the inlet of the releasing section through a pipeline, and the outlet of the releasing section is in communication with the heat pipe evaporation section; the absorbing section is rotationally connected to the outer wall of the double working medium driving device through a mounting bracket. The releasing section comprises a heat pipe condensing section and a liquid collecting pipe, the inlet of the heat pipe condensing section is in communication with the outlet of the gas collecting pipe, the outlet of the heat pipe condensing section is in communication with the inlet of the liquid collecting pipe, the outlet of the liquid collecting pipe is in communication with the inlet of the heat pipe evaporation section, and the heat pipe condensing section is used for exchanging heat with the double working medium driving device.

[0009] Preferably, the installation height of the heat absorption section is lower than that of the heat release section, and the outlet of the gas collecting pipe is connected with a fifth steam connecting pipe, the fifth steam connecting pipe is connected with a sixth steam connecting pipe through a first connecting hose, the sixth steam connecting pipe is connected with the inlet of the condensing section of the heat pipe through a gas distributing pipe; the outlet of the liquid collecting pipe is connected with a twenty-fourth liquid connecting pipe, the twenty-fourth liquid connecting pipe is connected with a twenty-third liquid connecting pipe through a second connecting hose, the twenty-third liquid connecting pipe is connected with the inlet of the evaporating section of the heat pipe through a liquid distributing pipe.

[0010] Preferably, the inner cavity of the dual-working fluid driving device forms a separation chamber and an evaporating chamber arranged in an up-down manner, and the separation chamber and the evaporating chamber are separated by a partition plate, one end of a thirteenth liquid connecting pipe is connected with the side wall of the evaporating chamber, the other end of the thirteenth liquid connecting pipe is connected with a user through a twelfth liquid connecting pipe and connected with the inlet of the heat exchange loop module through a first liquid connecting pipe, the evaporating chamber stores a low-boiling point working fluid and a carrier fluid arranged in a layered manner and arranged in an up-down manner, the carrier fluid is insoluble with the low-boiling point working fluid, and the density and boiling point of the low-boiling point working fluid are smaller than those of the carrier fluid, a liquid riser is installed on the partition plate, the lower end of the liquid riser is located in the evaporating chamber, the upper end of the liquid riser is located in the separation chamber, and both ends of the liquid riser are open, the lower end of the liquid riser is a horn mouth facing the bottom, a ball valve is arranged in the middle part of the liquid riser, the ball valve is located above the partition plate, the side wall of the liquid riser is further connected with an L-shaped air pipe at a position corresponding to the partition plate, one end of the L-shaped air pipe is connected with the inside of the liquid riser, and the other end of the L-shaped air pipe is connected with the separation chamber; the heat collecting device can extend into the evaporating chamber, and the heat collecting device can heat the carrier fluid in the evaporating chamber and make the low-boiling point working fluid in the evaporating chamber boil and vaporize when the heat collecting device releases heat, the liquid riser and the L-shaped air pipe can make the vaporized low-boiling point working fluid enter the separation chamber, the upper end of the separation chamber is connected with the liquid collecting device through a third steam connecting pipe, and the gaseous low-boiling point working fluid in the separation chamber can enter the liquid collecting device, and the outlet of the cooling device is connected with the evaporating chamber.

[0011] Preferably, the outlet of the liquid-accumulating device is connected with an eighteenth liquid connecting pipe, which can extend into the cooling device, the outlet of the eighteenth liquid connecting pipe extends out of the cooling device and is connected with the lower part of the evaporation chamber through a twentieth liquid connecting pipe; the inlet of the cooling device is connected with the outlet of the carrier fluid flow pipe group, and the outlet of the cooling device is connected with one end of a fourteenth liquid connecting pipe through a twenty-first liquid connecting pipe, and the other end of the fourteenth liquid connecting pipe is connected with the bottom of the evaporation chamber; one outlet of the heat exchange loop module is connected with the middle part of the fourteenth liquid connecting pipe through a fifteenth liquid connecting pipe.

[0012] Preferably, a vacuumizing pipe is arranged on the outer side wall of the evaporation chamber, the vacuumizing pipe is arranged close to the isolation plate, a low-boiling-point working medium injection pipe is arranged on the vacuumizing pipe, and the low-boiling-point working medium injection pipe is used for injecting low-boiling-point working medium into the evaporation chamber; a liquid level observation window is further arranged on the outer side wall of the evaporation chamber, and the liquid level observation window is arranged away from the vacuumizing pipe.

[0013] Preferably, the carrier fluid flow pipe group comprises a first rising pipe, a first falling pipe and a first U-shaped bend pipe, the first U-shaped bend pipe is used for being buried in soil, the lower end of the first rising pipe is connected with and communicates with the outlet end of the first U-shaped bend pipe, the upper end of the first rising pipe is connected with the inlet of the cooling device, the lower end of the first falling pipe is connected with and communicates with the inlet end of the first U-shaped bend pipe, and the upper end of the first falling pipe communicates with the binary working medium driving device; one end of a fourth steam connecting pipe is connected with the side wall of the liquid-accumulating device, the other end of the fourth steam connecting pipe is connected with one end of a reducing pipe fitting, the other end of the reducing pipe fitting communicates with one end of a twenty-second liquid connecting pipe through a vertical connecting pipe, the other end of the twenty-second liquid connecting pipe communicates with the first rising pipe, and a carrier fluid injection pipe is further connected with the side wall of the vertical connecting pipe, and the carrier fluid injection pipe is used for supplementing carrier fluid into the cooling device.

[0014] Preferably, the heat-removing pipe group comprises a second rising pipe, a second falling pipe and a second U-shaped bend pipe, the second U-shaped bend pipe is used for being buried in soil, the lower end of the second rising pipe is connected with and communicates with the outlet end of the second U-shaped bend pipe, the upper end of the second rising pipe is connected with one end of a seventeenth liquid connecting pipe, the other end of the seventeenth liquid connecting pipe communicates with the inlet of the heat exchange loop module, the lower end of the second falling pipe is connected with and communicates with the inlet end of the second U-shaped bend pipe, and the upper end of the second falling pipe is connected with a sixteenth liquid connecting pipe, and the sixteenth liquid connecting pipe is connected with one outlet of the heat exchange loop module.

[0015] Preferably, the heat exchange loop module comprises a ground source side circulating water pump, an evaporator, a compressor, a condenser and a load side circulating water pump, the current carrying fluid outlet on the side wall of the dual working fluid driving device and one end of the seventeenth liquid connecting pipe are in communication with one end of the fourth liquid connecting pipe, the inlet of the ground source side circulating water pump is connected to the other end of the fourth liquid connecting pipe, the outlet of the ground source side circulating water pump is connected to one end of a fifth liquid connecting pipe, the other end of the fifth liquid connecting pipe is connected to the current carrying fluid inlet of the evaporator, the current carrying fluid outlet of the evaporator is connected to one end of a third liquid connecting pipe, the other end of the third liquid connecting pipe is connected to one end of a second liquid connecting pipe, and one end of the sixteenth liquid connecting pipe, the other end of the second liquid connecting pipe is connected to the current carrying fluid inlet at the bottom of the dual working fluid driving device; The heat exchange inlet of the evaporator is connected to one end of a ninth liquid connecting pipe, the other end of the ninth liquid connecting pipe is provided with a throttling valve, the throttling valve is also connected to one end of an eighth liquid connecting pipe, the other end of the eighth liquid connecting pipe is connected to the condensing outlet of the condenser, the heat exchange outlet of the evaporator is connected to one end of a first steam connecting pipe, the other end of the first steam connecting pipe is connected to the compressor, the compressor is also connected to one end of a second steam connecting pipe, the other end of the second steam connecting pipe is connected to the condensing inlet of the condenser; The heat exchange inlet of the condenser is connected to one end of a seventh liquid connecting pipe, the other end of the seventh liquid connecting pipe can be connected to a user through a tenth liquid connecting pipe and connected to the current carrying fluid inlet at the bottom of the dual working fluid driving device through an eleventh liquid connecting pipe, the load side circulating water pump is installed on the tenth liquid connecting pipe, the heat exchange outlet of the condenser is connected to one end of a sixth liquid connecting pipe, the other end of the sixth liquid connecting pipe can be connected to a user.

[0016] The present application has the following technical effects relative to the prior art: The solar soil source coupled heat pump system with self-heat storage function provided by the application comprises a buried pipe heat exchanger with self-heat storage function, a heat extraction pipe group and a heat exchange loop module, the buried pipe heat exchanger with self-heat storage function is used for capturing heat in the environment to realize utilization of solar energy or air energy with higher temperature and release of heat energy, without circulating water pump and water storage device, and has the characteristics of small single land occupation and relatively flexible arrangement, the heat carrier flow pipe group of the buried pipe heat exchanger with self-heat storage function is used for heat exchange with the heat exchange loop module, and the heat exchange loop module is used for providing heat to users, thereby realizing stable heat supply to users through cooperation of the buried pipe heat exchanger with self-heat storage function and the heat exchange loop module, the heat extraction pipe group is arranged close to the heat carrier flow pipe group, the heat extraction pipe group is used for capturing heat in the soil to realize utilization of heat in the soil, thereby when the outdoor environment temperature is high or there is sunlight, the medium fluid in the heat extraction pipe group exchanges heat with the heat carrier flow pipe group and the underground soil at the same time, when the outdoor environment temperature is low or there is no sunlight, the medium fluid in the heat extraction pipe group exchanges heat with the underground soil only, the heat extraction pipe group can be connected with the heat exchange loop module, and the heat extraction pipe group is used for heat exchange with the heat exchange loop module to realize stable heat supply to users, the double working medium driving device of the buried pipe heat exchanger with self-heat storage function can be connected with the heat exchange loop module and the users respectively, and the double working medium driving device can directly provide heat to the users, the double working medium driving device can also exchange heat with the heat exchange loop module, thereby heat supply requirements in multiple situations can be realized through control of opening and closing of corresponding loops. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments will be briefly introduced below. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0018] Fig. 1 It is a structural schematic diagram of the solar soil source coupled heat pump system with self-heat storage function in the present application. Fig. 2 It is a structural schematic diagram of the buried pipe heat exchanger with self-heat storage function in the present application. Fig. 3 It is a structural schematic diagram of the heat storage device in the present application. In the figure: 1 - ground heat exchanger with self-heat storage function, 2 - first electric valve, 3 - first liquid connection pipe, 4 - second electric valve, 5 - second liquid connection pipe, 6 - third liquid connection pipe, 7 - fourth liquid connection pipe, 8 - ground source side circulating water pump, 9 - fifth liquid connection pipe, 10 - evaporator, 11 - first steam connection pipe, 12 - compressor, 13 - second steam connection pipe, 14 - condenser, 15 - sixth liquid connection pipe, 16 - load side circulating water pump, 17 - seventh liquid connection pipe, 18 - eighth liquid connection pipe, 19 - throttling valve, 20 - ninth liquid connection pipe, 21 - tenth liquid connection pipe, 22 - user, 23 - first stop valve, 24 - second stop valve, 25 - eleventh liquid connection pipe, 26 - third stop valve, 27 - twelfth liquid connection pipe, 28 - fourth stop valve, 29 - fifth stop valve, 30 - sixth stop valve, 31 - dual working medium driving device, 32 - separation chamber, 33 - liquid lifting pipe, 34 - ball valve, 35 - isolation plate, 36 - low-boiling working medium injection pipe, 37 - seventh stop valve, 38 - vacuumizing pipe, 39 - eighth stop valve, 40 - evaporation chamber, 41 - low-boiling working medium, 42 - liquid level observation window, 43 - carrier fluid, 44 - thirteenth liquid connection pipe, 45 - support, 46 - heat collecting device, 47 - third steam connection pipe, 48 - L-shaped air vent pipe, 49 - orifice, 50 - fourteenth liquid connection pipe, 51 - fifteenth liquid connection pipe, 52 - sixteenth liquid connection pipe, 53 - seventeenth liquid connection pipe, 54 - liquid accumulation device, 55 - eighteenth liquid connection pipe, 56 - nineteenth liquid connection pipe, 57 - first check valve, 58 - ninth stop valve, 59 - twentieth liquid connection pipe, 60 - second check valve, 61 - twenty-first liquid connection pipe, 62 - cooling device, 63 - first descending pipe, 64 - second descending pipe, 65 - first U-shaped bend pipe, 66 - heat extraction pipe group, 67 - second U-shaped bend pipe, 68 - third check valve, 69 - fourth steam connection pipe, 70 - automatic exhaust valve, 71 - reducing pipe fitting, 72 - vertical connection pipe, 73 - tenth stop valve, 74 - carrier fluid injection pipe, 75 - twenty-second liquid connection pipe, 76 - first ascending pipe, 77 - second ascending pipe, 78 - carrier fluid flow pipe group, 79 - glass cover plate, 80 - heat absorption layer, 81 - heat preservation layer, 82 - liquid distribution pipe, 83 - sealing plate, 84 - twenty-third liquid connection pipe, 85 - heat pipe evaporation section, 86 - gas collecting pipe, 87 - fifth steam connection pipe, 88 - first connecting hose, 89 - sixth steam connection pipe, 90 - gas distribution pipe, 91 - heat pipe condensation section, 92 - liquid collecting pipe, 93 - twenty-fourth liquid connection pipe, 94 - second connecting hose, 95 - heat absorption section, 96 - heat release section. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present application.

[0020] The purpose of the present application is to provide a solar-soil source coupled heat pump system with self-heat storage function to solve the problems existing in the prior art and realize the autonomous storage of heat converted from solar energy or air energy in underground soil without other energy consumption and stable heating supply.

[0021] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0022] As shown in Figs. 1-3 The present embodiment provides a solar-soil source coupled heat pump system with self-heat storage function, which comprises a buried pipe heat exchanger 1 with self-heat storage function, a heat extraction pipe group 66 and a heat exchange circuit module. The buried pipe heat exchanger 1 with self-heat storage function is used to capture heat in the environment to realize the utilization of solar energy or air energy with higher temperature and the release of heat energy, without circulating water pump and water storage device, and has the characteristics of small single land occupation and relatively flexible arrangement. The carrier fluid flow pipe group 78 of the buried pipe heat exchanger 1 with self-heat storage function is used to exchange heat with the heat exchange circuit module, and the heat exchange circuit module is used to provide heat to the user 22. Through the cooperation of the buried pipe heat exchanger 1 with self-heat storage function and the heat exchange circuit module, stable heating supply to the user 22 is realized. The carrier fluid flow pipe group 78 is arranged close to the heat extraction pipe group 66. The heat extraction pipe group 66 is used to capture heat in the soil to realize the utilization of heat in the soil. When the outdoor environment temperature is high or there is sunlight, the medium fluid in the heat extraction pipe group 66 exchanges heat with the carrier fluid flow pipe group 78 and the underground soil at the same time. When the outdoor environment temperature is low or there is no sunlight, the medium fluid in the heat extraction pipe group 66 exchanges heat with the underground soil only. The heat extraction pipe group 66 can communicate with the heat exchange circuit module, and is used to exchange heat with the heat exchange circuit module to realize stable heating supply to the user 22. The double working medium driving device 31 of the buried pipe heat exchanger 1 with self-heat storage function can communicate with the heat exchange circuit module and the user 22 respectively, and can directly provide heat to the user 22. The double working medium driving device 31 can also exchange heat with the heat exchange circuit module, and can realize the heating demand of various situations by controlling the opening and closing of the corresponding circuit.

[0023] Specifically, the ground heat exchanger 1 with self-heat storage function comprises a heat collecting device 46, a double working medium driving device 31, an accumulated liquid device 54, a cooling device 62 and a carrier fluid flow pipe group 78, the heat collecting device 46 is used for capturing heat in the environment to realize utilization of solar energy or air energy with higher temperature and release of heat energy, without circulating water pump and water storage device, with the characteristics of small single footprint and relatively flexible arrangement, the heat collecting device 46 is in communication with the double working medium driving device 31, and the heat collecting device 46 can exchange heat with the double working medium driving device 31, the double working medium driving device 31 stores carrier fluid 43 and low-boiling-point working medium 41, the carrier fluid 43 in the double working medium driving device 31 is heated by the heat collecting device 46, the double working medium driving device 31 is in communication with the accumulated liquid device 54, the accumulated liquid device 54 is in communication with the cooling device 62, the cooling device 62 is in communication with the double working medium driving device 31, the low-boiling-point working medium 41 in the double working medium driving device 31 can be vaporized after absorbing heat and enter the accumulated liquid device 54, the cooling device 62 can cool the low-boiling-point working medium 41 after vaporization flowing out of the accumulated liquid device 54 to obtain liquid low-boiling-point working medium 41, the cooled liquid low-boiling-point working medium 41 flows back to the double working medium driving device 31 for the next heat exchange, the carrier fluid flow pipe group 78 is used for being embedded in underground soil and exchanging heat, and the heat in the carrier fluid flow pipe group 78 can be stored in the underground soil, the double working medium driving device 31 is also in communication with the inlet of the carrier fluid flow pipe group 78, and the low-boiling-point working medium 41 in the double working medium driving device 31 can make the carrier fluid 43 enter the carrier fluid flow pipe group 78 and release heat after absorbing heat, the outlet of the carrier fluid flow pipe group 78 is in communication with the cooling device 62, and the carrier fluid 43 after releasing heat can flow through the cooling device 62 and flow back to the double working medium driving device 31, realizing recycling of the carrier fluid 43. Through the above design, the circulating water pump is not additionally arranged, the differences of different medium boiling points, solubility, density and other characteristics are considered, the carrier fluid 43 is used as heat transfer medium, and the low-boiling-point working medium 41 is used as pressure balancing agent and bubble pumping material, so that the heated carrier fluid 43 can produce circulating flow effect, and automatically store the heat generated by solar energy in the underground soil, which helps to reduce the energy consumption of the heat collecting device 46 for long-term heat storage of the drilling field.

[0024] The heat collecting device 46 is a solar heat collecting device 46, which comprises a heat absorbing section 95 and a heat releasing section 96 in communication with each other, the heat absorbing section 95 is used for capturing heat in the environment and exchanging heat to the heat releasing section 96, and the heat releasing section 96 is used for heat exchange with the double working medium driving device 31, thereby adopting the heat pipe heat transfer principle to realize capture and release of solar energy by using the heat absorbing section 95 and the heat releasing section 96 respectively, canceling the arrangement of the circulating water pump and the water storage device, saving the occupied space, and good in arrangement flexibility, through the automatic heat storage function, it is helpful to realize efficient underground storage of solar energy or air energy.

[0025] The heat absorption section 95 comprises a glass cover plate 79, a heat absorption layer 80, a heat preservation layer 81, a sealing plate 83, a heat pipe evaporation section 85 and a gas collecting pipe 86, the glass cover plate 79, the heat pipe evaporation section 85, the heat absorption layer 80, the heat preservation layer 81 and the sealing plate 83 are stacked from top to bottom, the outlet of the heat pipe evaporation section 85 is communicated with the inlet of the gas collecting pipe 86, the outlet of the gas collecting pipe 86 is communicated with the inlet of the heat releasing section 96 through a pipeline, and the outlet of the heat releasing section 96 is communicated with the heat pipe evaporation section 85; the heat absorption section 95 is rotatably connected to the outer wall of the double working medium driving device 31 through the mounting bracket 45, so as to adjust the installation angle of the heat absorption section 95.

[0026] The heat releasing section 96 comprises a heat pipe condensation section 91 and a liquid collecting pipe 92, the inlet of the heat pipe condensation section 91 is communicated with the outlet of the gas collecting pipe 86, the outlet of the heat pipe condensation section 91 is communicated with the inlet of the liquid collecting pipe 92, the outlet of the liquid collecting pipe 92 is communicated with the inlet of the heat pipe evaporation section 85, and the heat pipe condensation section 91 is used for heat exchange with the double working medium driving device 31.

[0027] The heat absorption section 95 and the heat releasing section 96 are installed at a certain angle with the horizontal plane, the installation height of the heat absorption section 95 is lower than that of the heat releasing section 96, so as to ensure that the condensed filling medium in the heat releasing section 96 flows into the evaporation section smoothly, thereby realizing continuous circulation work, the outlet of the gas collecting pipe 86 is connected with a fifth steam connecting pipe 87, the fifth steam connecting pipe 87 is connected with a sixth steam connecting pipe 89 through a first connecting hose 88, the sixth steam connecting pipe 89 is connected with the inlet of the heat pipe condensation section 91 through a gas distribution pipe 90; the outlet of the liquid collecting pipe 92 is connected with a twenty-fourth liquid connecting pipe 93, the twenty-fourth liquid connecting pipe 93 is connected with a twenty-third liquid connecting pipe 84 through a second connecting hose 94, the twenty-third liquid connecting pipe 84 is connected with the inlet of the heat pipe evaporation section 85 through a liquid distribution pipe 82, and the first connecting hose 88 and the second connecting hose 94 can ensure the smooth adjustment of the installation angle of the heat absorption section 95 and the heat releasing section 96.

[0028] The inner cavity of the double working substance driving device 31 forms the upper and lower arranged separation chamber 32 and evaporation chamber 40, and the separation chamber 32 and the evaporation chamber 40 are separated by the isolation plate 35, the outer side wall of the separation chamber 32 and the outer side wall of the evaporation chamber 40 are provided with heat preservation structures, one end of the thirteenth liquid connecting pipe 44 is connected with the side wall of the evaporation chamber 40, the other end of the thirteenth liquid connecting pipe 44 is communicated with the user 22 through the twelfth liquid connecting pipe 27, and the first liquid connecting pipe 3 is communicated with the inlet of the heat exchange loop module, the first electric valve 2 is arranged on the first liquid connecting pipe 3, and the first electric valve 2 is located between the twelfth liquid connecting pipe 27 and the evaporation chamber 40, the fourth stop valve 28 is arranged on the twelfth liquid connecting pipe 27, and the low boiling point working substance 41 and the carrier fluid 43 are stored in the evaporation chamber 40 and arranged in layers and arranged in upper and lower arrangement, the carrier fluid 43 is not soluble with the low boiling point working substance 41, and the density and boiling point of the low boiling point working substance 41 are smaller than the density of the carrier fluid 43, so that the low boiling point working substance 41 in the evaporation chamber 40 floats above the carrier fluid 43, in the embodiment, the low boiling point working substance 41 is preferably butane, and the carrier fluid 43 is preferably water, and those skilled in the art can also adjust according to the needs; the heat releasing section 96 is immersed in the carrier fluid 43 in the evaporation chamber 40, the isolation plate 35 is provided with a liquid lifting pipe 33, the lower end of the liquid lifting pipe 33 is located in the evaporation chamber 40, the upper end of the liquid lifting pipe 33 is located in the separation chamber 32 and immersed below the liquid level of the carrier fluid 43 in the evaporation chamber 40, the upper end of the liquid lifting pipe 33 is higher than the isolation plate 35 by a certain distance and located in the separation chamber 32, and both ends of the liquid lifting pipe 33 are open, the lower end of the liquid lifting pipe 33 is a horn mouth towards the bottom, a ball valve 34 is arranged in the middle of the liquid lifting pipe 33, the ball valve 34 is located above the isolation plate 35, and the side wall of the liquid lifting pipe 33 is further connected with an L-shaped air pipe 48 at the position corresponding to the isolation plate 35, the installation height of the L-shaped air pipe 48 is flush with the lowest design liquid level of the carrier fluid 43 in the evaporation chamber 40, one end of the L-shaped air pipe 48 is communicated with the inside of the liquid lifting pipe 33, and the other end of the L-shaped air pipe 48 is communicated with the separation chamber 32; the heat collecting device 46 can extend into the evaporation chamber 40, and the heat collecting device 46 can heat the carrier fluid 43 in the evaporation chamber 40 when releasing heat, so that the low boiling point working substance 41 in the evaporation chamber 40 is boiled and vaporized, the liquid lifting pipe 33 and the L-shaped air pipe 48 can make the vaporized low boiling point working substance 41 enter the separation chamber 32, the upper end of the separation chamber 32 is communicated with the liquid storage device 54 through the third steam connecting pipe 47, and the gaseous low boiling point working substance 41 in the separation chamber 32 can enter the liquid storage device 54, and the outlet of the cooling device 62 is communicated with the evaporation chamber 40.

[0029] In the embodiment, the heat energy collected by the heat collecting device 46 is used to heat the carrier fluid 43 in the evaporation chamber 40. When the carrier fluid 43 reaches a certain temperature, the low-boiling-point working medium 41 is vaporized. Part of the vaporized low-boiling-point working medium 41 is used to increase the pressure in the evaporation chamber 40, and the other part is collected through the trumpet mouth of the liquid lifting pipe 33 and the L-shaped vent pipe 48, and then pumped into the separation chamber 32 together with the carrier fluid 43. The steam of the low-boiling-point working medium 41 is separated from the carrier fluid 43 in the separation chamber 32. The carrier fluid 43 enters the nineteenth liquid connecting pipe 56 through the liquid outlet at the bottom of the separation chamber 32, and then enters the first descending pipe 63, and then enters the cooling device 62 through the first ascending pipe 76. The low-boiling-point working medium 41 is condensed into liquid in the cooling device 62, and then the carrier fluid 43 returns to the evaporation chamber 40 to make up for the carrier fluid 43 reduced due to entering the separation chamber 32.

[0030] The outlet of the liquid accumulation device 54 is connected to the eighteenth liquid connecting pipe 55, which can extend into the cooling device 62. The outlet of the eighteenth liquid connecting pipe 55 extends out of the cooling device 62 and is connected to the lower part of the evaporation chamber 40 through the twentieth liquid connecting pipe 59. The first check valve 57 is arranged near the double-working-medium driving device 31, and the twenty-third liquid connecting pipe 84 is arranged a distance below the trumpet mouth. The side wall of the twentieth liquid connecting pipe 59 is provided with a hole 49 between the edge of the trumpet mouth and the inner wall of the evaporation chamber 40. The inlet of the cooling device 62 is connected to the outlet of the carrier fluid flow pipe group 78. The outlet of the cooling device 62 is connected to one end of the fourteenth liquid connecting pipe 50 through the twenty-first liquid connecting pipe 61. The other end of the fourteenth liquid connecting pipe 50 is connected to the bottom of the evaporation chamber 40, and the twenty-first liquid connecting pipe 61 is provided with a second check valve 60. One outlet of the heat exchange loop module is connected to the middle part of the fourteenth liquid connecting pipe 50 through the fifteenth liquid connecting pipe 51.

[0031] The cooling device 62 is vertically installed, and the installation height H of the cooling device 62 is greater than the installation height H of the evaporation chamber 40. 冷却装置 satisfies .

[0032] A vacuum pipe 38 is arranged on the outer side wall of the evaporation chamber 40, and the eighth stop valve 39 is arranged on the vacuum pipe 38. A low-boiling-point working medium injection pipe 36 is arranged on the vacuum pipe 38, and the low-boiling-point working medium injection pipe 36 is arranged between the eighth stop valve 39 and the evaporation chamber 40. The low-boiling-point working medium injection pipe 36 is used to inject the low-boiling-point working medium 41 into the evaporation chamber 40, and the seventh stop valve 37 is arranged on the low-boiling-point working medium injection pipe 36. A liquid level observation window 42 is arranged on the outer side wall of the evaporation chamber 40, and the liquid level observation window 42 is arranged away from the vacuum pipe 38 and is used to observe the liquid level in the evaporation chamber 40.

[0033] The carrier fluid flow pipe group 78 comprises a first ascending pipe 76, a first descending pipe 63 and a first U-shaped bend pipe 65, the first U-shaped bend pipe 65 is used to be buried in the soil, the lower end of the first ascending pipe 76 is connected with and communicated with the outlet end of the first U-shaped bend pipe 65, the upper end of the first ascending pipe 76 is connected with the inlet of the cooling device 62, the lower end of the first descending pipe 63 is connected with and communicated with the inlet end of the first U-shaped bend pipe 65, and the upper end of the first descending pipe 63 is communicated with the double working medium driving device 31, that is, communicated with the separation chamber 32 through the nineteenth liquid connecting pipe 56; one end of a fourth steam connecting pipe 69 is connected with the side wall of the liquid storage device 54, the fourth steam connecting pipe 69 is provided with a third check valve 68, the other end of the fourth steam connecting pipe 69 is connected with one end of a reducing pipe fitting 71, and the automatic exhaust valve 70 is arranged between the fourth steam connecting pipe 69 and the reducing pipe fitting 71, the other end of the reducing pipe fitting 71 is communicated with one end of a twenty-second liquid connecting pipe 75 through a vertical connecting pipe 72, the other end of the twenty-second liquid connecting pipe 75 is communicated with the first ascending pipe 76, and a carrier fluid injection pipe 74 is further connected with the side wall of the vertical connecting pipe 72, the carrier fluid injection pipe 74 is used to supplement the carrier fluid 43 in the cooling device 62, and the tenth stop valve 73 is arranged on the carrier fluid injection pipe 74.

[0034] The heat extraction pipe group 66 comprises a second ascending pipe 77, a second descending pipe 64 and a second U-shaped bend pipe 67, the second U-shaped bend pipe 67 is used to be buried in the soil, the lower end of the second ascending pipe 77 is connected with and communicated with the outlet end of the second U-shaped bend pipe 67, the upper end of the second ascending pipe 77 is connected with one end of the seventeenth liquid connecting pipe 53, the other end of the seventeenth liquid connecting pipe 53 is communicated with the inlet of the heat exchange loop module, the lower end of the second descending pipe 64 is connected with and communicated with the inlet end of the second U-shaped bend pipe 67, and the upper end of the second descending pipe 64 is connected with the sixteenth liquid connecting pipe 52, the sixteenth liquid connecting pipe 52 is connected with one outlet of the heat exchange loop module. In the embodiment, the heat extraction pipe group 66 can be a single U-shaped heat exchange pipe, or a double U-shaped or other type heat exchange pipe.

[0035] The heat exchange loop module comprises a ground source side circulating water pump 8, an evaporator 10, a compressor 12, a condenser 14 and a load side circulating water pump 16, a current-carrying fluid outlet on the sidewall of the binary working fluid driving device 31 and one end of a seventeenth liquid connection pipe 53, the other end of the fourth liquid connection pipe 7 is connected with the inlet of the ground source side circulating water pump 8, one end of the fifth liquid connection pipe 9 is connected with the outlet of the ground source side circulating water pump 8, the current-carrying fluid inlet of the evaporator 10 is connected with the other end of the fifth liquid connection pipe 9, the current-carrying fluid outlet of the evaporator 10 is connected with one end of the third liquid connection pipe 6, the other end of the third liquid connection pipe 6 is connected with one end of the second liquid connection pipe 5 and one end of the sixteenth liquid connection pipe 52, the second electric valve 4 is arranged on the second liquid connection pipe 5, the second electric valve 4 is arranged close to the third liquid connection pipe 6, the fifth stop valve 29 is arranged on the sixteenth liquid connection pipe 52, and the other end of the second liquid connection pipe 5 is connected with the current-carrying fluid inlet at the bottom of the binary working fluid driving device 31. The heat exchange inlet of the evaporator 10 is connected with one end of the ninth liquid connection pipe 20, the other end of the ninth liquid connection pipe 20 is provided with a throttling valve 19, the throttling valve 19 is also connected with one end of an eighth liquid connection pipe 18, the other end of the eighth liquid connection pipe 18 is connected with the condensing outlet of the condenser 14, the heat exchange outlet of the evaporator 10 is connected with one end of the first steam connection pipe 11, the other end of the first steam connection pipe 11 is connected with the compressor 12, the compressor 12 is also connected with one end of the second steam connection pipe 13, and the other end of the second steam connection pipe 13 is connected with the condensing inlet of the condenser 14. The heat exchange inlet of the condenser 14 is connected with one end of the seventh liquid connection pipe 17, the other end of the seventh liquid connection pipe 17 can be connected with the user 22 through the tenth liquid connection pipe 21 and connected with the current-carrying fluid inlet at the bottom of the binary working fluid driving device 31 through the eleventh liquid connection pipe 25, the eleventh liquid connection pipe 25 is located between the second electric valve 4 and the evaporating chamber 40, the third stop valve 26 is arranged on the eleventh liquid connection pipe 25, the first stop valve 23 is arranged on the seventh liquid connection pipe 17 and close to the condenser 14, the load side circulating water pump 16 is installed on the tenth liquid connection pipe 21, the heat exchange outlet of the condenser 14 is connected with one end of the sixth liquid connection pipe 15, the other end of the sixth liquid connection pipe 15 can be connected with the user 22, and the second stop valve 24 is arranged on the sixth liquid connection pipe 15.

[0036] The working modes of the solar soil source coupled heat pump system with self-heat storage function in the embodiment include: the heat storage mode of the buried pipe heat exchanger 1 with self-heat storage function, the direct heating mode of the buried pipe heat exchanger 1 with self-heat storage function, the first heat pump heating mode (soil as heat source), the second heat pump heating mode (solar energy as heat source) and the third heat pump heating mode (soil source and solar energy as heat source).

[0037] The buried pipe heat exchanger 1 with self-heat storage function in heat storage mode: in the daytime in non-heating season with sufficient sunlight, the first electric valve 2 and the second electric valve 4 are closed, the third stop valve 26, the fourth stop valve 28, the fifth stop valve 29 and the sixth stop valve 30 are closed, the ball valve 34 is opened, the solar heat collector 46 heats the carrier fluid 43 in the evaporation chamber 40, the heated carrier fluid 43 enters the separation chamber 32 from the evaporation chamber 40, passes through the nineteenth liquid connecting pipe 56, then enters the first descending pipe 63, the second U-shaped bend pipe 67, the first ascending pipe 76 and exchanges heat with the underground soil, and finally the heat-exchanged carrier fluid 43 enters the evaporation chamber 40 through the twenty-second liquid connecting pipe 75, the cooling device 62, the twenty-first liquid connecting pipe 61 and the second check valve 60, completing the solar self-heat storage process.

[0038] The buried pipe heat exchanger 1 with self-heat storage function in direct heating mode: in the daytime in heating season with sufficient sunlight, the first electric valve 2 and the second electric valve 4 are closed, the first stop valve 23, the second stop valve 24, the fifth stop valve 29 and the sixth stop valve 30 are closed, the ball valve 34 is closed, the third stop valve 26 and the fourth stop valve 28 are opened, the solar heat collector 46 heats the carrier fluid 43 in the evaporation chamber 40, under the driving of the load side circulating water pump 16, the heated carrier fluid 43 in the evaporation chamber 40 enters the user 22 end heat exchange equipment, completing the direct heating process of the self-heat storage buried pipe heat exchanger.

[0039] The first heat pump heating mode (soil as heat source): in the night or the daytime without sunlight in the heating season, the first electric valve 2 and the second electric valve 4 are closed, the third stop valve 26, the fourth stop valve 28, the fifth stop valve 29 and the sixth stop valve 30 are closed, the heat extraction pipe group 66 extracts heat from the underground soil, enters the user 22 end heat exchange equipment after being lifted, completing the heating process of the first heat pump heating mode (soil as heat source).

[0040] The second heat pump heating mode (solar energy as heat source): in the daytime in the heating season with sufficient sunlight, the third stop valve 26, the fourth stop valve 28, the fifth stop valve 29 and the sixth stop valve 30 are closed, the ball valve 34 is closed, the first electric valve 2 and the second electric valve 4 are opened, and the first stop valve 23 and the second stop valve 24 are opened, the solar heat collector 46 heats the carrier fluid 43, which enters the user 22 end heat exchange equipment after being lifted, completing the heating process of the second heat pump heating mode (solar energy as heat source).

[0041] The third heat pump heating mode (soil source and solar energy as heat sources at the same time): in the daytime in the heating season, when the sunlight is insufficient, the third stop valve 26 and the fourth stop valve 28 are closed, the first electric valve 2 and the second electric valve 4 are opened, the first stop valve 23, the second stop valve 24, the fifth stop valve 29 and the sixth stop valve 30 are opened, the solar energy heat collector 46 heats the carrier fluid 43, the carrier fluid 43 in the heat extraction pipe group 66 is heated by the underground soil, and the carrier fluid 43 is lifted and enters the user 22 end heat exchange equipment, so that the third heat pump heating mode (soil source and solar energy as heat sources at the same time) is completed.

[0042] The embodiment can realize the following effects through the above design: in the non-heating season, only the buried pipe heat exchanger 1 with the self-heat storage function is used to store heat in the underground soil, in the heating season, the buried pipe heat exchanger 1 with the self-heat storage function can be directly used to heat the user 22, or the entire solar energy-soil source coupled heat pump system with the self-heat storage function can be used to heat the user 22, when the entire solar energy-soil source coupled heat pump system with the self-heat storage function is used to heat the user 22, the heat exchange loop module and the heat extraction pipe group 66 can independently extract heat from the underground soil or the evaporation chamber 40 of the buried pipe heat exchanger 1 with the self-heat storage function, or simultaneously extract heat from the underground soil and the evaporation chamber 40 of the buried pipe heat exchanger 1 with the self-heat storage function, so that the operation energy efficiency of the solar energy-soil source coupled heat pump system is obviously improved, and the application range is wide.

[0043] The principle and implementation mode of the present application are described by using specific examples in the present application, the above embodiment is only used for helping to understand the method and core idea of the present application; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the present application should not be understood as the limitation of the present application.

Claims

1. A solar-soil source coupled heat pump system with self-heat storage function, characterized in that: The buried pipe heat exchanger with self-heat storage function is used for capturing heat in the environment, the carrier fluid flow pipe group of the buried pipe heat exchanger with self-heat storage function is used for heat exchange with the heat exchange loop module, and the heat exchange loop module is used for providing heat to the user; the carrier fluid flow pipe group is arranged close to the heat extraction pipe group, the heat extraction pipe group is used for capturing heat in the soil, the heat extraction pipe group can be connected to the heat exchange loop module, and the heat extraction pipe group is used for heat exchange with the heat exchange loop module; the double working medium driving device of the buried pipe heat exchanger with self-heat storage function can be connected to the heat exchange loop module and the user respectively, and the double working medium driving device can directly provide heat to the user; the double working medium driving device can also be used for heat exchange with the heat exchange loop module.

2. The solar soil source coupled heat pump system with self-heat accumulation function according to claim 1, characterized in that: The buried pipe heat exchanger with self-heat storage function comprises a heat collecting device, the double working medium driving device, a liquid accumulation device, a cooling device and the carrier fluid flow pipe group; the heat collecting device is used for capturing heat in the environment, the heat collecting device is connected to the double working medium driving device, and the heat collecting device can be used for heat exchange with the double working medium driving device; the double working medium driving device stores carrier fluid and low-boiling-point working medium; the double working medium driving device is connected to the liquid accumulation device, the liquid accumulation device is connected to the cooling device, the cooling device is connected to the double working medium driving device; the low-boiling-point working medium in the double working medium driving device can be vaporized after absorbing heat and enter the liquid accumulation device; the cooling device can cool the vaporized low-boiling-point working medium flowing out of the liquid accumulation device, and make the cooled liquid low-boiling-point working medium return to the double working medium driving device; the carrier fluid flow pipe group is used for being buried in the underground soil and being used for heat exchange; the double working medium driving device is also connected to the inlet of the carrier fluid flow pipe group, and the low-boiling-point working medium in the double working medium driving device can make the carrier fluid enter the carrier fluid flow pipe group and release heat after absorbing heat; the outlet of the carrier fluid flow pipe group is connected to the cooling device, and the carrier fluid after releasing heat can flow through the cooling device and return to the double working medium driving device.

3. The solar-ground source coupled heat pump system with self-heat storage function according to claim 2, characterized in that: The heat collecting device is a solar heat collecting device, which comprises a heat absorbing section and a heat releasing section connected to each other; the heat absorbing section is used for capturing heat in the environment and exchanging heat to the heat releasing section; the heat releasing section is used for heat exchange with the double working medium driving device; The heat absorbing section comprises a glass cover plate, a heat absorbing layer, an insulation layer, a sealing plate, a heat pipe evaporation section and a gas collecting pipe; the glass cover plate, the heat pipe evaporation section, the heat absorbing layer, the insulation layer and the sealing plate are stacked from top to bottom; the outlet of the heat pipe evaporation section is connected to the inlet of the gas collecting pipe; the outlet of the gas collecting pipe is connected to the inlet of the heat releasing section through a pipeline; the outlet of the heat releasing section is connected to the heat pipe evaporation section; the heat absorbing section is rotationally connected to the outer wall of the double working medium driving device through a mounting bracket. The heat releasing section comprises a heat pipe condensing section and a liquid collecting pipe, the inlet of the heat pipe condensing section is communicated with the outlet of the gas collecting pipe, the outlet of the heat pipe condensing section is communicated with the inlet of the liquid collecting pipe, the outlet of the liquid collecting pipe is communicated with the inlet of the heat pipe evaporating section, and the heat pipe condensing section is used for heat exchange with the double working medium driving device.

4. The solar soil source coupled heat pump system with self-heat accumulation function according to claim 3, characterized in that: The installation height of the heat absorbing section is lower than that of the heat releasing section, the outlet of the gas collecting pipe is connected with a fifth steam connecting pipe, the fifth steam connecting pipe is connected with a sixth steam connecting pipe through a first connecting hose, and the sixth steam connecting pipe is connected with the inlet of the heat pipe condensing section through a gas distributing pipe; the outlet of the liquid collecting pipe is connected with a twenty-fourth liquid connecting pipe, the twenty-fourth liquid connecting pipe is connected with a twenty-third liquid connecting pipe through a second connecting hose, and the twenty-third liquid connecting pipe is connected with the inlet of the heat pipe evaporating section through a liquid distributing pipe.

5. The solar-ground source coupled heat pump system with self-heat accumulation function according to claim 2, characterized in that: The inner cavity of the double working medium driving device forms a separation chamber and an evaporation chamber arranged in sequence, and the separation chamber and the evaporation chamber are separated by a partition plate, one end of a thirteenth liquid connecting pipe is connected with the side wall of the evaporation chamber, the other end of the thirteenth liquid connecting pipe is communicated with a user through a twelfth liquid connecting pipe and the inlet of the heat exchange loop module through a first liquid connecting pipe, the evaporation chamber stores a low boiling point working medium and a carrier fluid arranged in layers and arranged in sequence, the carrier fluid is not soluble with the low boiling point working medium, and the density and boiling point of the low boiling point working medium are smaller than those of the carrier fluid, a liquid lifting pipe is installed on the partition plate, the lower end of the liquid lifting pipe is located in the evaporation chamber, the upper end of the liquid lifting pipe is located in the separation chamber, both ends of the liquid lifting pipe are open, the lower end of the liquid lifting pipe is a horn mouth towards the bottom, a ball valve is arranged in the middle part of the liquid lifting pipe, the ball valve is located above the partition plate, an L-shaped air pipe is further connected with the side wall of the liquid lifting pipe at the position corresponding to the partition plate, one end of the L-shaped air pipe is communicated with the inside of the liquid lifting pipe, and the other end of the L-shaped air pipe is communicated with the separation chamber; the heat collecting device can extend into the evaporation chamber, the carrier fluid in the evaporation chamber can be heated when the heat collecting device releases heat, the low boiling point working medium in the evaporation chamber can be boiled and vaporized, the liquid lifting pipe and the L-shaped air pipe can make the vaporized low boiling point working medium enter the separation chamber, the upper end of the separation chamber is communicated with the liquid storage device through a third steam connecting pipe, and the gaseous low boiling point working medium in the separation chamber can enter the liquid storage device, and the outlet of the cooling device is communicated with the evaporation chamber.

6. The solar-ground source coupled heat pump system with self-heat accumulation function according to claim 5, characterized in that: The outlet of the liquid-accumulating device is connected with an eighteenth liquid connection pipe which can extend into the cooling device, the outlet of the eighteenth liquid connection pipe extends out of the cooling device and is connected with the lower part of the evaporation chamber through a twentieth liquid connection pipe; the inlet of the cooling device is connected with the outlet of the carrier fluid flow pipe group, the outlet of the cooling device is connected with one end of a fourteenth liquid connection pipe through a twenty-first liquid connection pipe, the other end of the fourteenth liquid connection pipe is connected with the bottom of the evaporation chamber; one outlet of the heat exchange loop module is connected with the middle part of the fourteenth liquid connection pipe through a fifteenth liquid connection pipe.

7. The solar-ground source coupled heat pump system with self-heat accumulation function according to claim 5, characterized in that: A vacuumizing pipe is arranged on the outer side wall of the evaporation chamber, the vacuumizing pipe is arranged close to the isolation plate, a low-boiling-point working medium injection pipe is arranged on the vacuumizing pipe, the low-boiling-point working medium injection pipe is used for injecting low-boiling-point working medium into the evaporation chamber; a liquid level observation window is arranged on the outer side wall of the evaporation chamber, the liquid level observation window is arranged away from the vacuumizing pipe. 8.The solar soil source coupled heat pump system with self-heat accumulation function according to claim 2, characterized in that: The carrier fluid flow pipe group comprises a first rising pipe, a first descending pipe and a first U-shaped bend pipe, the first U-shaped bend pipe is used for being buried in soil, the lower end of the first rising pipe is connected with and communicates with the outlet end of the first U-shaped bend pipe, the upper end of the first rising pipe is connected with the inlet of the cooling device, the lower end of the first descending pipe is connected with and communicates with the inlet end of the first U-shaped bend pipe, the upper end of the first descending pipe communicates with the double-working-medium driving device; one end of a fourth steam connection pipe is connected with the side wall of the liquid-accumulating device, the other end of the fourth steam connection pipe is connected with one end of a reducing pipe fitting, the other end of the reducing pipe fitting communicates with one end of a twenty-second liquid connection pipe through a vertical connection pipe, the other end of the twenty-second liquid connection pipe communicates with the first rising pipe, a carrier fluid injection pipe is further connected with the side wall of the vertical connection pipe, the carrier fluid injection pipe is used for supplementing carrier fluid into the cooling device.

9. The solar-ground source coupled heat pump system with self-heat accumulation function according to claim 1, characterized in that: The heat-removing pipe group comprises a second rising pipe, a second descending pipe and a second U-shaped bend pipe, the second U-shaped bend pipe is used for being buried in soil, the lower end of the second rising pipe is connected with and communicates with the outlet end of the second U-shaped bend pipe, the upper end of the second rising pipe is connected with one end of a seventeenth liquid connection pipe, the other end of the seventeenth liquid connection pipe communicates with the inlet of the heat exchange loop module, the lower end of the second descending pipe is connected with and communicates with the inlet end of the second U-shaped bend pipe, the upper end of the second descending pipe is connected with a sixteenth liquid connection pipe, the sixteenth liquid connection pipe is connected with one outlet of the heat exchange loop module.

10. The solar-ground source coupled heat pump system with self-heat accumulation function according to claim 9, characterized in that: The heat exchange circuit module comprises a ground source side circulating water pump, an evaporator, a compressor, a condenser and a load side circulating water pump, the current carrying fluid outlet on the sidewall of the dual working fluid driving device and one end of the seventeenth liquid connection pipe are in communication with one end of a fourth liquid connection pipe, an inlet of the ground source side circulating water pump is connected to the other end of the fourth liquid connection pipe, an outlet of the ground source side circulating water pump is connected to one end of a fifth liquid connection pipe, the other end of the fifth liquid connection pipe is connected to a current carrying fluid inlet of the evaporator, a current carrying fluid outlet of the evaporator is connected to one end of a third liquid connection pipe, the other end of the third liquid connection pipe is connected to one end of a second liquid connection pipe and one end of a sixteenth liquid connection pipe, the other end of the second liquid connection pipe is connected to a current carrying fluid inlet at the bottom of the dual working fluid driving device; An exchange inlet of the evaporator is connected to one end of a ninth liquid connection pipe, the other end of the ninth liquid connection pipe is provided with a throttling valve, the throttling valve is also connected to one end of an eighth liquid connection pipe, the other end of the eighth liquid connection pipe is connected to a condensing outlet of the condenser, an exchange outlet of the evaporator is connected to one end of a first steam connection pipe, the other end of the first steam connection pipe is connected to the compressor, the compressor is also connected to one end of a second steam connection pipe, the other end of the second steam connection pipe is connected to a condensing inlet of the condenser; An exchange inlet of the condenser is connected to one end of a seventh liquid connection pipe, the other end of the seventh liquid connection pipe can be connected to a user through a tenth liquid connection pipe and connected to a current carrying fluid inlet at the bottom of the dual working fluid driving device through an eleventh liquid connection pipe, the load side circulating water pump is installed on the tenth liquid connection pipe, an exchange outlet of the condenser is connected to one end of a sixth liquid connection pipe, the other end of the sixth liquid connection pipe can be connected to a user.

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