U-shaped joint structure for ground source heat pump and ground source heat pump

Abstract

The utility model provides a U-shaped connector structure for a ground source heat pump and the ground source heat pump, and relates to the technical field of ground source heat pumps, the U-shaped connector structure for the ground source heat pump comprises a main shell, two cavities are arranged in the main shell, and the two cavities are communicated through a connecting channel; the two adapting pipes are arranged at one end of the main shell and are respectively communicated with the two cavities; the two hot melting pipes are respectively arranged at the outer ends of the adapting pipes; the inner air bag and the outer air bag are arranged on the inner side and the outer side of the adapting pipe respectively, and the inner air bag and the outer air bag are communicated through a communication part; the driving part is movably arranged on the outer side of the adapting pipe, the driving part is detachably connected with the root of the adapting pipe, and when the driving part is connected with the root of the adapting pipe, the driving part can compress the outer air bag and enable the inner air bag to expand; the problem that when an existing U-shaped connector is in socket connection with a butt joint pipe, due to vibration of an external pipeline or the U-shaped connector, connection failure or leakage hidden danger is easily caused is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the ground source heat pump technical field, more specifically, relate to a ground source heat pump with U type joint structure and ground source heat pump. BACKGROUND

[0002] As a new HVAC technology that can utilize renewable energy, ground source heat pump is a high-efficiency energy-saving technology recognized in the field of building energy saving. The ground source (buried pipe) heat pump air conditioning system uses the underground rock-soil body with constant temperature all year round as the cold and heat source, and the energy efficiency ratio is almost not affected by the outdoor environment temperature throughout the year, so it is widely used. The buried pipe heat exchanger is the core component of the ground source heat pump system, and there are many types, among which the single and double U-shaped heat exchangers are the most widely used, and the U-shaped joint is an important part of the U-shaped heat exchanger. At present, the commonly used single U-shaped joint structure on the market has two types: split single U-shaped joint and integrated single U-shaped joint. The single U-shaped joint is composed of an upper support and a lower support. The two parts are respectively molded by mold injection, and are welded together by hot melt butt joint method, and then the welded joint is machined and formed. The single U-shaped joint and the pipe are mostly connected by electric melting, which requires additional electric melting sleeve, and the system has many welding points, which is easy to leak, and increases the installation cost. If the single U-shaped joint is connected by a socket, although it has the advantages of fewer welding points and lower installation cost, when the external pipeline or the single U-shaped joint vibrates, the hot melt connection between them is easy to fail or cause leakage. SUMMARY

[0003] The utility model discloses a kind of U-shaped joint structures for ground source heat pump, to solve the problem that the U-shaped joint of prior art is connected with socket connection pipe, and vibration of external pipeline or U-shaped joint is easy to cause connection failure or produce leakage hidden danger.

[0004] To achieve the above object, the utility model provides a kind of U-shaped joint structure for ground source heat pump, comprising:

[0005] Main shell, the inside of the main shell is provided with two cavities, two the cavities are communicated by connecting channel between two the cavities;

[0006] Two receiving pipes, two the receiving pipes are arranged at one end of the main shell, and are communicated with two the cavities respectively;

[0007] Two hot melt pipes, two the hot melt pipes are respectively arranged at the outer end of the receiving pipe;

[0008] Inner air bag and outer air bag, the inner air bag and the outer air bag are respectively arranged at the inner side and the outer side of the receiving pipe, and the inner air bag and the outer air bag are communicated by communicating part;

[0009] A driving component movably arranged outside the receiving tube and detachably connected to the root of the receiving tube, the driving component being capable of compressing the outer air bag and expanding the inner air bag when connected to the root of the receiving tube.

[0010] Optionally, the main housing is provided with a miscellaneous storage cavity away from one end of the receiving tube, the miscellaneous storage cavity being in communication with the two cavities.

[0011] Optionally, the connecting channel comprises a plurality of connecting holes with circular arc-shaped axes, the connecting holes being arranged on the partition plate part separating the two cavities, and the connecting holes being in the shape of upwardly arched middle parts so that the two ends of the connecting holes are inclined towards the side away from the receiving tube.

[0012] Optionally, the inner diameter of the hot melt tube is larger than the inner diameter of the receiving tube, and the interiors of the hot melt tube and the receiving tube are capable of accommodating the insertion of the connecting tube.

[0013] Optionally, the inner wall of the receiving tube is provided with an annular first accommodating groove, the annular inner air bag being arranged in the first accommodating groove, and the outer wall of the receiving tube is provided with a columnar second accommodating groove extending along the axis of the receiving tube, the columnar outer air bag being arranged in the second accommodating groove.

[0014] Optionally, the outer periphery of the inner air bag is fixedly connected to the groove bottom of the first accommodating groove, the lower end of the outer air bag is fixedly connected to the lower side groove wall of the second accommodating groove, the receiving tube is provided with a through hole near the lower end of the outer air bag, and a tubular communication part for communicating the outer air bag and the inner air bag is arranged in the through hole.

[0015] Optionally, the second accommodating groove is uniformly distributed with at least two along the circumference of the receiving tube, and one outer air bag is arranged in each second accommodating groove.

[0016] Optionally, the driving component comprises a first annular part, the driving component being sleeved on the outer periphery of the receiving tube, and the first annular part being provided with a driving block extending to the interior thereof, the driving block being used for compressing the outer air bag.

[0017] Optionally, the driving component further comprises a second annular part, the second annular part being rotationally connected to the first annular part, the inner periphery of the second annular part being provided with a first threaded part, the root of the receiving tube being provided with a second threaded part, and the first threaded part being matched with the second threaded part.

[0018] The utility model also provides a ground source heat pump which comprises the U-shaped joint structure for the ground source heat pump.

[0019] The utility model provides a kind of U-shaped joint structure and ground source heat pump for ground source heat pump, its beneficial effect is at: the U-shaped joint structure for ground source heat pump is provided with receiving pipe in the upper end of main casing, receiving pipe is provided with hot melt pipe in outer end, butt joint pipe can be inserted into hot melt pipe and receiving pipe by the way of socket, and hot melt connection is carried out by hot melt pipe, when butt joint pipe is inserted into receiving pipe inside, inner air bag is surrounded in the circumference of butt joint pipe, at this time, by driving component moves downwards until the root of receiving pipe is connected, in the process that driving component moves downwards, outer air bag can be compressed, so that the gas in outer air bag enters into inner air bag by communicating part, to further make inner air bag swell, the inner air bag of swelling can be in close contact with the circumference of butt joint pipe, the gap between butt joint pipe and receiving pipe is filled quickly, greatly improve the firmness of butt joint pipe and the U-shaped joint structure for ground source heat pump connected and the sealing property of connection, since the outer air bag of swelling is elastic structure, thereby reduce the risk that connection failure or leakage hidden danger is caused due to the vibration of butt joint pipe or the U-shaped joint structure for ground source heat pump.

[0020] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other objects, features and advantages of the utility model will become more apparent from the following detailed description of exemplary embodiments of the utility model, taken in conjunction with the accompanying drawings in which like reference characters typically identify similar components throughout the drawing figures. It should be understood that the drawings are not necessarily to scale and that, unless otherwise noted, like reference characters are intended to represent similar components throughout all the views.

[0022] Figure 1 It shows the overall schematic diagram of the U-shaped joint structure for ground source heat pump according to one embodiment of the utility model.

[0023] Figure 2 It shows the cutaway schematic diagram of the U-shaped joint structure for ground source heat pump according to one embodiment of the utility model.

[0024] Figure 3 It shows Figure 2 The enlarged schematic diagram of A of

[0025] BRIEF DESCRIPTION OF DRAWINGS

[0026] 1, main casing;2, baffle part;2a, connecting hole;3, receiving pipe;3a, first accommodating groove;3b, second accommodating groove;31, second threaded portion;4, inner air bag;5, outer air bag;6, driving component;61, first annular portion;62, second annular portion;63, driving block;7, hot melt pipe. DETAILED DESCRIPTION

[0027] Preferred embodiments of the present application will be described in more detail below. Although the following describes preferred embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make the present application more thorough and complete, and to convey the scope of the present application to those skilled in the art.

[0028] To solve the problem of connection failure or leakage risk caused by vibration of external pipeline or U-shaped joint when the U-shaped joint is connected with the socket of the butt joint pipe in the prior art, the utility model provides a U-shaped joint structure for ground source heat pump, which comprises:

[0029] The main shell is internally provided with two cavities, and the two cavities are communicated through a connecting channel;

[0030] Two receiving pipes are arranged at one end of the main shell and are respectively communicated with the two cavities;

[0031] Two hot-melt pipes are respectively arranged at the outer ends of the receiving pipes;

[0032] An inner air bag and an outer air bag are respectively arranged at the inner side and the outer side of the receiving pipe, and the inner air bag and the outer air bag are communicated through a communicating part;

[0033] A driving component is movably arranged at the outer side of the receiving pipe, and the driving component is detachably connected with the root of the receiving pipe; when the driving component is connected with the root of the receiving pipe, the driving component can compress the outer air bag and make the inner air bag expand.

[0034] Specifically, the U-shaped joint structure for ground source heat pump is provided with a receiving pipe at the upper end of the main shell, and a hot-melt pipe is arranged at the outer end of the receiving pipe; the butt joint pipe can be inserted into the hot-melt pipe and the receiving pipe in the form of socket connection, and is hot-melt connected through the hot-melt pipe; when the butt joint pipe is inserted into the receiving pipe, the inner air bag surrounds the outer periphery of the butt joint pipe; at this time, the driving component is moved downward until it is connected with the root of the receiving pipe; in the process of moving downward of the driving component, the outer air bag can be compressed, so that the gas in the outer air bag enters the inner air bag through the communicating part, and then the inner air bag expands; the expanded inner air bag can be in close contact with the outer periphery of the butt joint pipe, and can quickly fill the gap between the butt joint pipe and the receiving pipe, thereby greatly improving the firmness and sealing performance of the connection between the butt joint pipe and the U-shaped joint structure for ground source heat pump; since the expanded outer air bag is an elastic structure, the risk of connection failure or leakage at the connection between the butt joint pipe and the U-shaped joint structure for ground source heat pump due to vibration of the butt joint pipe or the U-shaped joint structure for ground source heat pump is reduced.

[0035] Optionally, the main shell is provided with a storage cavity away from one end of the receiving pipe, and the storage cavity is in communication with the two cavities.

[0036] Specifically, the storage cavity is used for storing impurities brought in by the liquid.

[0037] Optionally, the connecting channel comprises a plurality of connecting holes with circular arc-shaped axes, the connecting holes are arranged on the partition plate part separating the two cavities, and the connecting holes are in a shape of arching upward in the middle part, so that the two ends of the connecting holes are inclined toward the side away from the receiving pipe.

[0038] Specifically, the connecting hole is a circular arc-shaped hole, and the two ends of the connecting hole are inclined downward. In this way, when the water flow flows from one cavity into another cavity through the connecting hole, the impurities in the water flow are more likely to sink into the bottom of the main shell under the action of gravity and then enter the storage cavity.

[0039] Optionally, the inner diameter of the hot melt pipe is greater than the inner diameter of the receiving pipe, and the inner part of the hot melt pipe and the inner part of the receiving pipe can accommodate the insertion of the connecting pipe.

[0040] Specifically, the connecting pipe is an external pipeline, the external pipeline is inserted into the receiving pipe in a socket and spigot manner through the hot melt pipe, and is connected by hot melting of the hot melt pipe.

[0041] Optionally, the inner wall of the receiving pipe is provided with an annular first accommodating groove, the annular inner air bag is arranged in the first accommodating groove, the outer wall of the receiving pipe is provided with a columnar second accommodating groove extending along the axis of the receiving pipe, and the columnar outer air bag is arranged in the second accommodating groove.

[0042] Specifically, the first accommodating groove is arranged to provide a space for accommodating the inner air bag in the receiving pipe, without affecting the insertion of the connecting pipe, and the second accommodating groove is arranged to form a space for accommodating the outer air bag on the outer side of the receiving pipe, without affecting the sleeving of the driving part.

[0043] Optionally, the outer periphery of the inner air bag is fixedly connected with the groove bottom of the first accommodating groove, the lower end of the outer air bag is fixedly connected with the lower side groove wall of the second accommodating groove, the receiving pipe is provided with a through hole near the lower end of the outer air bag, and a tubular communication part for communicating the outer air bag and the inner air bag is arranged in the through hole.

[0044] Specifically, the outer periphery of the inner air bag is fixedly connected with the groove bottom of the first accommodating groove, and the rest part of the inner air bag is not connected with the receiving pipe, so as to facilitate the expansion and deformation of the inner air bag, the lower end of the outer air bag is fixedly connected with the lower side groove wall of the second accommodating groove, and the rest part of the outer air bag is not connected with the receiving pipe, so as to facilitate the compression and deformation of the outer air bag by the driving part, and a tubular communication part is arranged in the through hole and connected with the inner air bag and the outer air bag to communicate them.

[0045] Optionally, at least two second receiving slots are evenly distributed along the circumference of the receiving pipe, and each second receiving slot is provided with one of the external airbags.

[0046] Specifically, the number of external airbags can be set as needed to drive the expansion of the internal airbags and ensure the expansion effect.

[0047] Optionally, the driving component includes a first annular portion, which is sleeved on the outer periphery of the receiving tube. The first annular portion is provided with a driving block extending inward therefrom, which is used to compress the external airbag.

[0048] Specifically, as the first annular part moves downward, the driving block on its inner circumference compresses the outer airbag downward, causing the gas inside the outer airbag to enter the inner airbag and inflate the inner airbag.

[0049] Optionally, the driving component further includes a second annular portion, which is rotatably connected to the first annular portion. The inner circumference of the second annular portion is provided with a first threaded portion, and the root of the receiving pipe is provided with a second threaded portion. The first threaded portion and the second threaded portion cooperate with each other.

[0050] Specifically, when the first annular part moves into place, the first annular part is fixed by the threaded connection between the second annular part and the receiving pipe.

[0051] This utility model also provides a ground source heat pump, including the above-mentioned U-shaped joint structure for ground source heat pumps.

[0052] Specifically, the ground source heat pump uses the aforementioned U-shaped joint structure to achieve a socket-type heat fusion connection with the external pipeline, namely the connecting pipe. After the connection is completed, the compression of the outer air bladder causes the inner air bladder to expand. The expanded inner air bladder makes close contact with the outer periphery of the connecting pipe, quickly filling the gap between the connecting pipe and the receiving pipe. This improves the firmness and sealing of the connection between the connecting pipe and the ground source heat pump U-shaped joint structure, thereby reducing the risk of connection failure or leakage caused by vibration of the connecting pipe or the ground source heat pump U-shaped joint structure.

[0053] Example 1

[0054] like Figures 1 to 3 As shown, this utility model provides a U-shaped connector structure for a ground source heat pump, comprising:

[0055] The main housing 1 has two cavities inside, which are connected by a connecting channel.

[0056] Two receiving pipes 3 are provided at one end of the main housing 1 and are respectively connected to two cavities;

[0057] two hot melt pipes 7, two hot melt pipes 7 are respectively arranged at the outer end of the receiving pipe 3;

[0058] the inner gas bag 4 and the outer gas bag 5, the inner gas bag 4 and the outer gas bag 5 are respectively arranged at the inner side and the outer side of the receiving pipe 3, and the inner gas bag 4 and the outer gas bag 5 are communicated through the communication part;

[0059] the driving component 6, the driving component 6 is movably arranged at the outer side of the receiving pipe 3, and the driving component 6 is detachably connected with the root of the receiving pipe 3, when the driving component 6 is connected with the root of the receiving pipe 3, the driving component 6 can compress the outer gas bag 5 and make the inner gas bag 4 expand.

[0060] Optionally, the main shell 1 is provided with a miscellaneous storage cavity away from one end of the receiving pipe 3, and the miscellaneous storage cavity is communicated with the two cavities.

[0061] Optionally, the connecting channel includes a plurality of connecting holes 2a with circular arc-shaped axes, the plurality of connecting holes 2a are arranged on the partition plate 2 separating the two cavities, and the connecting holes 2a are in a shape of arching upward in the middle, so that the two ends of the connecting holes 2a are inclined toward the side away from the receiving pipe 3.

[0062] Optionally, the inner diameter of the hot melt pipe 7 is greater than the inner diameter of the receiving pipe 3, and the interiors of the hot melt pipe 7 and the receiving pipe 3 can accommodate the insertion of the butt joint pipe.

[0063] Optionally, the inner wall of the receiving pipe 3 is provided with an annular first accommodating groove 3a, the annular inner gas bag 4 is arranged in the first accommodating groove 3a, the outer wall of the receiving pipe 3 is provided with a columnar second accommodating groove 3b extending along the axis of the receiving pipe 3, and the columnar outer gas bag 5 is arranged in the second accommodating groove 3b.

[0064] Optionally, the outer periphery of the inner gas bag 4 is fixedly connected with the groove bottom of the first accommodating groove 3a, the lower end of the outer gas bag 5 is fixedly connected with the lower side groove wall of the second accommodating groove 3b, the receiving pipe 3 is provided with a through hole near the lower end of the outer gas bag 5, and a tubular communication part for communicating the outer gas bag 5 and the inner gas bag 4 is arranged in the through hole.

[0065] Optionally, the second accommodating groove 3b is uniformly distributed with at least two along the circumference of the receiving pipe 3, and one outer gas bag 5 is arranged in each second accommodating groove 3b.

[0066] Optionally, the driving component 6 includes a first annular part 61, the driving component 6 is sleeved on the outer periphery of the receiving pipe 3, the first annular part 61 is provided with a driving block 63 extending to the inside thereof, and the driving block 63 is used for compressing the outer gas bag 5.

[0067] Optionally, the driving component 6 further comprises a second annular part 62, the second annular part 62 is rotationally connected with the first annular part 61, the inner periphery of the second annular part 62 is provided with a first threaded part, the root of the receiving pipe 3 is provided with a second threaded part 31, the first threaded part cooperates with the second threaded part 31.

[0068] In the embodiment, the U-shaped joint structure for the ground source heat pump is single U joint, two parallel receiving pipes 3 are fixed on the main shell 1, and a partition plate 2 separating two cavities is fixed in the main shell 1, a plurality of connection holes 2a equidistantly distributed upward and downward are formed in the partition plate 2; when the U-shaped joint structure for the ground source heat pump is used, water enters the cavity in communication with one of the receiving pipes 3, and the increasing water flow in the cavity can flow into the other cavity through the connection holes 2a, and then flows out from the other receiving pipe 3, so that the water flow still maintains the original flow through the connection holes 2a, and the water flow is ensured to be smooth; since the connection holes 2a formed in the partition plate 2 are downward inclined to the two cavities, the impurities such as silt and iron filings in the water flow can slide into the bottom of the main shell 1 along the downward inclined surface of the connection holes 2a under the action of their own gravity, and can sink into the impurity storage cavity, so that the U-shaped joint structure for the ground source heat pump is prevented from being blocked, and the effect that the water flow in the U-shaped joint structure for the ground source heat pump is smooth is ensured.

[0069] In the embodiment, when the U-shaped joint structure for the ground source heat pump is connected with the external pipeline, i.e. the butt pipe, the external pipeline passes through the hot melting pipe 7 and extends into the receiving pipe 3 below the inner air bag 4, the hot melting pipe 7 is arranged so that the U-shaped joint structure for the ground source heat pump can be directly connected by hot melting, the electric melting sleeve is saved, the welding points are reduced, the risk of water leakage is reduced, and the installation cost is reduced; subsequently, the driving component 6 is used to compress the outer air bag 5, so that the gas in the outer air bag 5 flows into the inner air bag 4, and the inner air bag 4 is inflated.

[0070] In the embodiment, the driving component 6 comprises a first annular part 61 and a second annular part 62 which are sequentially arranged along the axis of the receiving pipe 3 and rotationally connected, the connection mode can be achieved by the nested cooperation of the annular limiting groove and the annular limiting protrusion, which will not be described here; the driving block 63 on the first annular part 61 is slidingly arranged in the second receiving groove 3b and fixedly connected with the upper end of the corresponding outer air bag 5, and the second annular part 62 is detachably connected with the root of the receiving pipe 3 in a threaded connection manner; when the driving component 6 is operated, the driving component 6 is slid downward along the axis of the receiving pipe 3, so that the driving block 63 on the first annular part 61 compresses the outer air bag 5 downward, when the second annular part 62 slides to the root of the receiving pipe 3, the second annular part 62 is rotated to connect the driving component 6 with the receiving pipe 3, so that the inflation operation of the inner air bag 4 is completed, which is simple and convenient.

[0071] In summary, the U-shaped joint structure for ground source heat pump provided by the utility model uses once external pipeline, namely, the socket type connection of the butt joint pipe as an example:

[0072] The external pipeline is inserted into the receiving pipe 3 through the hot melting pipe 7, so that the inner air bag 4 is outside the external pipeline, and the hot melting pipe 7 is connected with the external pipeline through hot melting, compared with electric melting connection, the electric melting sleeve is saved, the welding point is reduced, the connection process is simplified, and the installation cost is reduced; then the driving part 6 is moved downward, the outer air bag 5 is pressed downward by the driving block 63, the inner air bag 4 is inflated, the inner air bag 4 is inflated, until the second annular part 62 can be screwed at the root of the receiving pipe 3, the driving part 6 is fixed at the root of the receiving pipe 3, and the inflation operation of the inner air bag 4 is completed.

[0073] Embodiment two

[0074] The utility model also provides a ground source heat pump which comprises the U-shaped joint structure for ground source heat pump.

[0075] In the embodiment, the ground source heat pump is connected with the external pipeline, namely, the socket type hot melting connection of the butt joint pipe through the U-shaped joint structure for ground source heat pump, after being connected, the inner air bag 4 is inflated due to the compression of the outer air bag 5, the inner air bag 4 is in close contact with the outer periphery of the butt joint pipe through inflation, the gap between the butt joint pipe and the receiving pipe 3 is quickly filled, the firmness and the sealing property of the connection between the butt joint pipe and the U-shaped joint structure for ground source heat pump are improved, and the risk that the connection between the butt joint pipe and the U-shaped joint structure for ground source heat pump is disconnected or leakage is caused due to vibration is reduced.

[0076] The above has described the various embodiments of the utility model, the above description is exemplary, is not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes are obvious to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A U-shaped connector structure for a ground source heat pump, characterized in that, The utility model relates to a U-shaped joint structure for ground source heat pump, comprising: a main shell, the inside of the main shell is provided with two cavities, two the cavities are communicated through connecting channel; two receiving pipes, two the receiving pipes are arranged at one end of the main shell and are communicated with two the cavities respectively; two hot melt pipes, two the hot melt pipes are arranged at the outer end of the receiving pipe respectively; inner air bag and outer air bag, the inner air bag and the outer air bag are arranged at the inner side and the outer side of the receiving pipe respectively, and the inner air bag is communicated with the outer air bag through the communication part; drive component, the drive component is movably arranged at the outer side of the receiving pipe, and the drive component is detachably connected with the root of the receiving pipe, when the drive component is connected with the root of the receiving pipe, the drive component can compress the outer air bag and make the inner air bag expand.

2. The U-joint structure for a ground source heat pump according to claim 1, characterized by The main shell is provided with a storage cavity away from the receiving pipe, and the storage cavity is communicated with two the cavities.

3. The U-joint structure for a ground source heat pump according to claim 1, characterized by The connecting channel includes a plurality of connecting holes with circular arc axis, a plurality of the connecting holes are arranged on the partition plate part between two the cavities, and the connecting hole is in the shape of arching upward in the middle, so that the two ends of the connecting hole are inclined to the side away from the receiving pipe.

4. The U-joint structure for a ground source heat pump according to claim 1, characterized by The inner diameter of the hot melt pipe is greater than the inner diameter of the receiving pipe, and the inner part of the hot melt pipe and the receiving pipe can accommodate the insertion of the butt joint pipe.

5. The U-joint structure for a ground source heat pump according to claim 1, wherein The inner wall of the receiving pipe is provided with an annular first accommodating groove, and the annular inner air bag is arranged in the first accommodating groove.

6. The U-joint structure for a ground source heat pump according to claim 5, wherein The outer periphery of the inner air bag is fixedly connected with the groove bottom of the first accommodating groove, the lower end of the outer air bag is fixedly connected with the lower side groove wall of the second accommodating groove, and the receiving pipe is provided with a through hole near the lower end of the outer air bag.

7. The U-joint structure for a ground source heat pump according to claim 5, wherein The second accommodating groove is uniformly distributed along the circumference of the receiving pipe, and each second accommodating groove is provided with an outer air bag.

8. The U-joint structure for a ground source heat pump according to claim 1, wherein The drive component includes a first annular part, the drive component is sleeved on the outer periphery of the receiving pipe, the first annular part is provided with a drive block extending to the inside thereof, and the drive block is used for compressing the outer air bag.

9. The U-joint structure for a ground source heat pump according to claim 8, wherein The drive component further includes a second annular part, the second annular part is rotationally connected with the first annular part, the inner periphery of the second annular part is provided with a first threaded part, the root of the receiving pipe is provided with a second threaded part, and the first threaded part is matched with the second threaded part.

10. A ground source heat pump characterised in that, The utility model relates to a U-shaped joint structure for ground source heat pump, comprising: any one of claims 1-9.

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