Solar auxiliary heating type ground source heat pump equipment

Abstract

The utility model discloses solar auxiliary heating type ground source heat pump equipment which comprises a heat pump main machine, a first heat preservation water tank is arranged on the right side of the heat pump main machine, four sets of U-shaped buried pipes are arranged below a backflow pipe and a drainage pipe, and a solar auxiliary heating energy storage mechanism is arranged on the right side of the first heat preservation water tank. According to the solar auxiliary heating type ground source heat pump equipment, through the arrangement of the conduction pipe, the electromagnetic valve, the second heat preservation water tank, the auxiliary heating coil pipe, the solar cell panel and the storage battery pack, when the equipment is used, the solar cell panel converts light energy into electric energy and sends the electric energy to the storage battery pack for storage through a conductive cable, and the electric heating pipe is heated to heat water in the second heat preservation water tank; meanwhile, an electromagnetic valve on the conduction pipe is opened, water in the first heat preservation water tank enters the auxiliary heating coil pipe along the conduction pipe and exchanges heat with water in the second heat preservation water tank, the energy storage, energy conservation and auxiliary heating functions are achieved, and the problem that the device does not have the energy storage, energy conservation and auxiliary heating functions is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of ground source heat pumps, in particular to a solar-assisted heating type ground source heat pump equipment. Background Art

[0002] A ground-source heat pump is an efficient, energy-saving and environmentally friendly air-conditioning system that utilizes shallow underground geothermal resources for both heating and cooling. By inputting a small amount of electrical energy, it can achieve energy transfer from a low-temperature heat source to a high-temperature heat source.

[0003] The common solar-assisted ground-source heat pump equipment currently on the market is mostly similar in structure, with heat pump host, buried pipes, insulated water tanks and solar collector panels as main components. The heat pump host sends water in the insulated water tank into the buried pipes, and heat is exchanged through the buried pipes and the underground constant temperature layer. The water body that has changed temperature through heat exchange exchanges heat with the room through heat coils and fan coils to adjust the indoor temperature. The solar collector panel can convert light energy into heat energy during the day to achieve the effect of auxiliary warming. There are some functional deficiencies in actual use, and there is room for improvement. For example, the application scenarios of solar-assisted heating are limited, and it can only be used for warming. The heating efficiency is also limited in low temperature weather in winter. In summer, there is not much demand for heating, and there is not much improvement in energy-saving effect. It does not have the function of energy storage and energy-saving auxiliary heating. Secondly, the buried pipe is buried deep underground. When the pipe is broken or leaked, the host on the ground cannot sense it in time. It can only be found when the water pressure is obviously insufficient or mud and sand enter the pipeline to cause problems. There is obvious lag, and it does not have the function of pipeline flow monitoring. In addition, the current buried pipe construction process is relatively simple. Wells are directly dug on the ground and then the pipeline is lowered. Although PVC pipes have certain corrosion resistance, their own strength is limited. After rupture, mud and sand can directly enter the pipeline, which poses a greater hidden danger to the equipment and does not have the function of external protection of the pipeline.

[0004] Now, a new type of solar-assisted ground-source heat pump equipment is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a solar-assisted heating type ground-source heat pump equipment to solve the problem that the above-mentioned background technology does not have the function of energy storage, energy saving and auxiliary heating.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a solar-assisted ground-source heat pump equipment, comprising a heat pump main unit, a first insulated water tank is arranged on the right side of the heat pump main unit, a return pipe is installed between one side of the heat pump main unit and one side of the first insulated water tank, a water outlet pipe is arranged below the return pipe, a heat coil circulation pipeline is installed on one side of the top of the first insulated water tank, a heat coil pipe group is arranged on the top of the heat coil circulation pipeline, a fan circulation pipeline is installed on the other side of the top of the first insulated water tank, and the fan A fan coil is arranged on one side of the machine circulation pipeline, and a return pipe is installed on the other side of the heat pump main unit, a drain pipe is arranged above the return pipe, four groups of "U"-shaped buried pipes are arranged below the return pipe and the drain pipe, four groups of first connecting pipes are installed at the bottom of the drain pipe, and four groups of second connecting pipes are fixedly connected to the bottom end of the return pipe, the outside of the "U"-shaped buried pipe is sleeved with a stainless steel outer sheath, and a top cover is installed on the top of the stainless steel outer sheath, and a solar auxiliary heat storage mechanism is arranged on the right side of the first thermal insulation water tank.

[0007] The solar energy auxiliary thermal energy storage mechanism includes a second insulated water tank, which is arranged on the right side of the first insulated water tank, an auxiliary heating coil is installed on one side inside the second insulated water tank, a solar panel is arranged above the second insulated water tank, a battery pack is arranged below the second insulated water tank, a conductive cable is installed between one end of the solar panel and one side of the battery pack, a bottom mounting plate is fixedly connected to the bottom of the second insulated water tank, and electric heating tubes are respectively installed at the four corners of the top of the bottom mounting plate.

[0008] Preferably, a conducting pipe is fixedly connected between the upper and lower ends of one side of the auxiliary heating coil and the other side of the first insulated water tank, and an electromagnetic valve is installed inside the conducting pipe. The first insulated water tank, the conducting pipe and the auxiliary heating coil are connected to each other.

[0009] Preferably, two groups of switch power lines are arranged between the bottom end of the bottom mounting plate and the top end of the battery pack, and the electric heating tubes are symmetrically distributed about the vertical center line of the bottom mounting plate.

[0010] Preferably, a temperature sensor is installed at the middle position of the top of the bottom mounting plate, and the heat pump host, solar panel, battery pack, electric heating pipe and temperature sensor are electrically connected.

[0011] Preferably, the bottoms of the first connecting pipe and the second connecting pipe are connected to the top of the "U"-shaped buried pipe, and the interiors of the first connecting pipe, the second connecting pipe and the "U"-shaped buried pipe are interconnected.

[0012] Preferably, a first external clamp-on flow meter is sleeved on the outside of the first connecting tube, and a second external clamp-on flow meter is sleeved on the outside of the second connecting tube. The inner diameter of the first external clamp-on flow meter is consistent with the outer diameter of the first connecting tube, and the inner diameter of the second external clamp-on flow meter is consistent with the outer diameter of the second connecting tube.

[0013] Preferably, the top end of the "U"-shaped buried pipe passes through the top end of the top cover and extends to the outside, and the connection position between the "U"-shaped buried pipe and the top cover is sealed.

[0014] Preferably, a graphite heat-conducting filler is fixedly connected to the interior of the stainless steel outer sheath, a reserved groove is provided inside the graphite heat-conducting filler, and the outer wall of the "U"-shaped buried pipe fits with the inner wall of the reserved groove.

[0015] Compared with the prior art, the utility model has the following beneficial effects: the solar-assisted ground-source heat pump equipment not only realizes the functions of energy storage, energy saving and auxiliary heating, but also realizes the function of pipeline flow monitoring and the function of pipeline external protection;

[0016] By providing a conducting pipe, a solenoid valve, a second insulated water tank, an auxiliary heating coil, a solar panel, a conductive cable, a battery pack, a bottom mounting plate, a switch power cord, an electric heating tube and a temperature sensor, when in use, the first insulated water tank is used as a storage container for circulating water. Taking winter heating as an example, during heat exchange, the heat pump host draws cold water from the first insulated water tank, and sends it to the "U"-shaped buried pipe through a return pipe and a drain pipe. Through heat exchange with the "U"-shaped buried pipe and the underground constant temperature layer, the water body returns to the first insulated water tank through the return pipe and the outlet pipe after the temperature is raised. The heat coil circulation pipeline pumps hot water to the heat coil pipe group. The ground temperature in the building rises, and the fan circulation pipeline pumps hot water to the fan coil. The fan coil blows out hot air to warm the indoor air. When the temperature rises, in sunny weather, the solar panel converts light energy into electrical energy and sends it to the battery pack for storage through conductive cables. When auxiliary heating is needed, the electric heating tube and the temperature sensor are powered by the switch power line. The electric heating tube heats the water in the second thermal insulation water tank. At the same time, the solenoid valve on the conduction pipe opens, and the water inside the first thermal insulation water tank enters the auxiliary heating coil along the conduction pipe and exchanges heat with the water in the second thermal insulation water tank. The water in the second thermal insulation water tank can also be used directly as shower water. The battery pack stores electrical energy and can synchronize the function of the heat pump host. It can relieve the pressure on the urban power grid during peak electricity consumption and reduce electricity costs. The choice of auxiliary heating time is more flexible, realizing the function of energy storage and energy saving auxiliary heating.

[0017] By providing a first connecting pipe, a first external clamp-on flow meter, a second connecting pipe and a second external clamp-on flow meter, when in use, the return pipe, the drain pipe, the "U"-shaped underground pipe, the return pipe and the outlet pipe form a complete circulation pipeline under the drive of the heat pump host, the drain pipe and the "U"-shaped underground pipe are connected by the first connecting pipe, and the return pipe and the "U"-shaped underground pipe are connected by the second connecting pipe. When a single group of "U"-shaped underground pipes is damaged, the first external clamp-on flow meter outside the corresponding first connecting pipe and the second external clamp-on flow meter outside the second connecting pipe can timely sense the flow change, which is convenient for users to query in the background terminal, and can timely discover pipeline problems, thereby realizing the function of pipeline flow monitoring;

[0018] By providing a stainless steel outer sleeve, a top cover, a graphite thermal conductive filler and a reserved groove, when in use, before burying the "U"-shaped buried pipe, first dig a ground well of corresponding length on the ground, insert the stainless steel outer sleeve into the well first, then insert the "U"-shaped buried pipe into the stainless steel outer sleeve, cover the top cover and seal it well. The stainless steel outer sleeve and the top cover can protect the "U"-shaped buried pipe and reduce the probability of damage and leakage caused by external force. At the same time, the graphite thermal conductive filler inside the stainless steel outer sleeve has excellent thermal conductivity. The "U"-shaped buried pipe and the inner wall of the reserved groove fit together without affecting the normal heat exchange efficiency, thereby realizing the function of external protection of the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a front view structural schematic diagram of the utility model;

[0020] Figure 2 This is a front view enlarged structural diagram of the bottom mounting plate of the utility model;

[0021] Figure 3 For the utility model Figure 1 The enlarged structural diagram at A in the middle;

[0022] Figure 4 This is a schematic diagram of an enlarged partial cross-section of the stainless steel outer sleeve of the utility model.

[0023] In the figure: 1. heat pump host; 2. return pipe; 3. outlet pipe; 4. first insulated water tank; 5. heat coil circulation pipeline; 6. heat coil pipe group; 7. fan circulation pipeline; 8. fan coil; 9. conduction pipe; 10. solenoid valve; 11. second insulated water tank; 12. auxiliary heat coil; 13. solar panel; 14. conductive cable; 15. battery pack; 16. bottom mounting plate; 17. switch power line; 18. electric heating pipe; 19. temperature sensor; 20. return pipe; 21. drain pipe; 22. first connecting pipe; 23. first external clamp-on flow meter; 24. second connecting pipe; 25. second external clamp-on flow meter; 26. "U"-shaped buried pipe; 27. stainless steel outer sheath; 28. top cover; 29. ​​graphite thermal conductive filler; 30. reserved groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] Example 1: Please refer to Figure 1-4 , a solar energy auxiliary heating type ground source heat pump equipment, comprising a heat pump main unit 1, a first insulated water tank 4 is arranged on the right side of the heat pump main unit 1, a return pipe 2 is installed between one side of the heat pump main unit 1 and one side of the first insulated water tank 4, a water outlet pipe 3 is arranged below the return pipe 2, a heat coil circulation pipeline 5 is installed on one side of the top of the first insulated water tank 4, a heat coil pipe group 6 is arranged on the top of the heat coil circulation pipeline 5, a fan circulation pipeline 7 is installed on the other side of the top of the first insulated water tank 4, a fan coil 8 is arranged on one side of the fan circulation pipeline 7, a return pipe 20 is installed on the other side of the heat pump main unit 1, a drain pipe 21 is arranged above the return pipe 20, four groups of "U"-shaped buried pipes 26 are arranged below the return pipe 20 and the drain pipe 21, and a solar energy auxiliary heat storage mechanism is arranged on the right side of the first insulated water tank 4;

[0026] See also Figure 1-4A solar-assisted ground-source heat pump equipment also includes a solar-assisted heat storage mechanism, which includes a second insulated water tank 11, which is arranged on the right side of the first insulated water tank 4, and an auxiliary heat coil 12 is installed on one side of the second insulated water tank 11, a solar panel 13 is arranged above the second insulated water tank 11, and a battery pack 15 is arranged below the second insulated water tank 11, and a conductive cable 14 is installed between one end of the solar panel 13 and one side of the battery pack 15, and a bottom mounting plate 16 is fixedly connected to the bottom of the second insulated water tank 11, and electric heating pipes 18 are respectively installed at the four corners of the top of the bottom mounting plate 16;

[0027] A conducting pipe 9 is fixedly connected between the upper and lower ends of one side of the auxiliary heating coil 12 and the other side of the first heat-insulating water tank 4, and a solenoid valve 10 is installed inside the conducting pipe 9. The first heat-insulating water tank 4, the conducting pipe 9, and the interior of the auxiliary heating coil 12 are connected. Two groups of switch power lines 17 are arranged between the bottom end of the bottom mounting plate 16 and the top of the battery pack 15. The electric heating pipe 18 is symmetrically distributed about the vertical center line of the bottom mounting plate 16. A temperature sensor 19 is installed at the middle position of the top of the bottom mounting plate 16. The heat pump host 1, the solar panel 13, the battery pack 15, the electric heating pipe 18, and the temperature sensor 19 are electrically connected. The battery pack stores energy, which is more flexible in auxiliary heat regulation and can also ensure energy saving and environmental protection;

[0028] Specifically, Figure 1 and Figure 2 As shown, the solar panel 13 converts light energy into electrical energy and sends it to the battery pack 15 for storage through the conductive cable 14. When auxiliary heating is needed, the electric heating tube 18 and the temperature sensor 19 are powered by the switch power line 17. The electric heating tube 18 heats the water in the second insulated water tank 11. At the same time, the solenoid valve 10 on the conducting pipe 9 is opened, and the water inside the first insulated water tank 4 enters the auxiliary heating coil 12 along the conducting pipe 9 and exchanges heat with the water in the second insulated water tank 11. The water in the second insulated water tank 11 can also be directly used as shower water. The battery pack 15 stores electrical energy and can synchronize the function of the heat pump host 1. It can relieve the pressure on the urban power grid during peak power consumption and reduce the cost of electricity. The choice of auxiliary heating time is more flexible.

[0029] Embodiment 2: Four groups of first connecting pipes 22 are installed at the bottom of the drainage pipe 21, and four groups of second connecting pipes 24 are fixedly connected to the bottom end of the return pipe 20. The bottoms of the first connecting pipes 22 and the second connecting pipes 24 are connected to the top of the "U"-shaped buried pipe 26. The first connecting pipes 22, the second connecting pipes 24, and the insides of the "U"-shaped buried pipe 26 are connected. The outside of the first connecting pipe 22 is sleeved with a first external clamp-on flow meter 23, and the outside of the second connecting pipe 24 is sleeved with a second external clamp-on flow meter 25. The inner diameter of the first external clamp-on flow meter 23 is consistent with the outer diameter of the first connecting pipe 22, and the inner diameter of the second external clamp-on flow meter 25 is consistent with the outer diameter of the second connecting pipe 24. Through flow monitoring, pipeline problems can be discovered in time, thereby improving maintenance efficiency;

[0030] Specifically, Figure 1 and Figure 3 As shown, the drain pipe 21 and the "U"-shaped buried pipe 26 are connected by a first connecting pipe 22, and the return pipe 20 and the "U"-shaped buried pipe 26 are connected by a second connecting pipe 24. When a single group of "U"-shaped buried pipes 26 is damaged, the corresponding first external clamp-on flow meter 23 outside the first connecting pipe 22 and the second external clamp-on flow meter 25 outside the second connecting pipe 24 can sense the flow changes in time, which is convenient for users to query in the background terminal and discover pipeline problems in time.

[0031] Embodiment 3: The outside of the "U"-shaped buried pipe 26 is sleeved with a stainless steel outer sleeve 27, and a top cover 28 is installed on the top of the stainless steel outer sleeve 27. The top of the "U"-shaped buried pipe 26 passes through the top of the top cover 28 and extends to the outside. The connection position of the "U"-shaped buried pipe 26 and the top cover 28 is sealed. The inside of the stainless steel outer sleeve 27 is fixedly connected with a graphite heat conductive filler 29, and a reserved groove 30 is provided inside the graphite heat conductive filler 29. The outer wall of the "U"-shaped buried pipe 26 and the inner wall of the reserved groove 30 are in contact with each other, which can protect the buried pipe and reduce the probability of damage.

[0032] Specifically, Figure 1 and Figure 4 As shown, the stainless steel outer sheath 27 is first inserted into the well, and then the "U"-shaped buried pipe 26 is inserted into the stainless steel outer sheath 27, and the top cover 28 is covered and sealed. The stainless steel outer sheath 27 and the top cover 28 can protect the "U"-shaped buried pipe 26 and reduce the probability of damage and leakage due to external forces. At the same time, the graphite thermal conductive filler 29 inside the stainless steel outer sheath 27 has excellent thermal conductivity, and the "U"-shaped buried pipe 26 and the inner wall of the reserved groove 30 are in contact, which does not affect the efficiency of normal heat exchange.

[0033] Working principle: When the utility model is in use, first, the first insulated water tank 4 is used as a storage container for circulating water. Taking winter heating as an example, during heat exchange, the heat pump host 1 draws cold water from the first insulated water tank 4 and sends it to the "U"-shaped buried pipe 26 through the return pipe 2 and the drain pipe 21. After the water body is heated up, it flows back to the first insulated water tank 4 through the return pipe 20 and the outlet pipe 3. The hot coil circulation pipeline 5 pumps the hot water to the hot coil pipe group 6. The ground temperature in the building rises, and the fan circulation pipeline 7 pumps the hot water to the fan coil 8. The fan coil 8 blows out hot air to raise the indoor air temperature. In sunny weather, the solar panel 13 will light up the building. The energy can be converted into electrical energy and sent to the battery pack 15 for storage through the conductive cable 14. When auxiliary heating is needed, the electric heating tube 18 and the temperature sensor 19 are powered by the switch power line 17. The electric heating tube 18 heats the water in the second insulated water tank 11. At the same time, the solenoid valve 10 on the conducting pipe 9 is opened, and the water inside the first insulated water tank 4 enters the auxiliary heating coil 12 along the conducting pipe 9 and exchanges heat with the water in the second insulated water tank 11. The water in the second insulated water tank 11 can also be directly used as shower water. The battery pack 15 stores electrical energy and can synchronize the function of the heat pump host 1. It can relieve the pressure on the urban power grid during peak power consumption and reduce the cost of electricity. The choice of auxiliary heating time is more flexible. The return pipe 2, the drain pipe 21, the "U"-shaped buried pipe 26, the return pipe 20, and the outlet pipe 3 form a complete circulation pipeline under the drive of the heat pump host 1. The drain pipe 21 and the "U"-shaped buried pipe 26 are connected by the first connecting pipe 22, and the return pipe 20 and the "U"-shaped buried pipe 26 are connected by the second connecting pipe 24. When a single group of "U"-shaped buried pipes 26 is damaged, the corresponding first external clamp-on flow meter 23 outside the first connecting pipe 22 and the second external clamp-on flow meter 25 outside the second connecting pipe 24 can sense the flow changes in time, which is convenient for users to query in the background terminal and discover pipeline problems in time. Before burying the "U"-shaped buried pipe 26, a well of corresponding length is first dug on the ground, the stainless steel outer sheath 27 is first inserted into the well, and then the "U"-shaped buried pipe 26 is inserted into the stainless steel outer sheath 27, and the top cover 28 is covered and sealed. The stainless steel outer sheath 27 and the top cover 28 can protect the "U"-shaped buried pipe 26 and reduce the probability of damage and leakage due to external forces. At the same time, the graphite thermal conductive filler 29 inside the stainless steel outer sheath 27 has excellent thermal conductivity. The "U"-shaped buried pipe 26 and the inner wall of the reserved groove 30 fit together without affecting the efficiency of normal heat exchange.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A solar-assisted ground-source heat pump device, comprising a heat pump main unit (1), characterized in that: A first insulated water tank (4) is arranged on the right side of the heat pump main unit (1); a return pipe (2) is installed between one side of the heat pump main unit (1) and one side of the first insulated water tank (4); a water outlet pipe (3) is arranged below the return pipe (2); a heat coil circulation pipeline (5) is installed on one side of the top of the first insulated water tank (4); a heat coil pipe group (6) is arranged on the top of the heat coil circulation pipeline (5); a fan circulation pipeline (7) is installed on the other side of the top of the first insulated water tank (4); a fan coil (8) is arranged on one side of the fan circulation pipeline (7); and a fan coil (9) is installed on the other side of the heat pump main unit (1). A return pipe (20) is provided, a drainage pipe (21) is provided above the return pipe (20), four groups of "U"-shaped buried pipes (26) are provided below the return pipe (20) and the drainage pipe (21), four groups of first connecting pipes (22) are installed at the bottom of the drainage pipe (21), four groups of second connecting pipes (24) are fixedly connected to the bottom end of the return pipe (20), a stainless steel outer sheath (27) is sleeved on the outside of the "U"-shaped buried pipe (26), a top cover (28) is installed on the top of the stainless steel outer sheath (27), and a solar energy auxiliary heat storage mechanism is provided on the right side of the first thermal insulation water tank (4); The solar thermal auxiliary energy storage mechanism comprises a second thermal insulation water tank (11), the second thermal insulation water tank (11) being arranged on the right side of the first thermal insulation water tank (4), an auxiliary heating coil (12) being installed on one side of the interior of the second thermal insulation water tank (11), a solar panel (13) being arranged above the second thermal insulation water tank (11), a storage battery pack (15) being arranged below the second thermal insulation water tank (11), a conductive cable (14) being installed between one end of the solar panel (13) and one side of the storage battery pack (15), a bottom mounting plate (16) being fixedly connected to the bottom of the second thermal insulation water tank (11), and electric heating pipes (18) being installed at four corners of the top of the bottom mounting plate (16), respectively.

2. A solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: A conducting pipe (9) is fixedly connected between the upper and lower ends of one side of the auxiliary heating coil (12) and the other side of the first heat-insulating water tank (4), respectively; a solenoid valve (10) is installed inside the conducting pipe (9); and the interiors of the first heat-insulating water tank (4), the conducting pipe (9), and the auxiliary heating coil (12) are interconnected.

3. A solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: Two groups of switch power lines (17) are arranged between the bottom end of the bottom mounting plate (16) and the top end of the storage battery pack (15), and the electric heating pipes (18) are symmetrically distributed about the vertical center line of the bottom mounting plate (16).

4. The solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: A temperature sensor (19) is installed at a middle position on the top of the bottom mounting plate (16), and the heat pump host (1), the solar panel (13), the battery pack (15), the electric heating pipe (18), and the temperature sensor (19) are electrically connected.

5. The solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: The bottoms of the first connecting pipe (22) and the second connecting pipe (24) are connected to the top of the U-shaped buried pipe (26), and the interiors of the first connecting pipe (22), the second connecting pipe (24) and the U-shaped buried pipe (26) are interconnected.

6. The solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: The first connecting tube (22) is sleeved with a first external clamp-on flow meter (23), and the second connecting tube (24) is sleeved with a second external clamp-on flow meter (25). The inner diameter of the first external clamp-on flow meter (23) is consistent with the outer diameter of the first connecting tube (22), and the inner diameter of the second external clamp-on flow meter (25) is consistent with the outer diameter of the second connecting tube (24).

7. The solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: The top end of the U-shaped buried pipe (26) passes through the top end of the top cover (28) and extends to the outside, and the connection position between the U-shaped buried pipe (26) and the top cover (28) is sealed.

8. The solar-assisted ground-source heat pump equipment according to claim 1, characterized in that: A graphite heat-conducting filler (29) is fixedly connected to the interior of the stainless steel outer sheath (27), a reserved groove (30) is provided inside the graphite heat-conducting filler (29), and the outer wall of the "U"-shaped buried pipe (26) and the inner wall of the reserved groove (30) are in contact with each other.

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