阅读说明：本技术 一种利用深基坑墙支护和地下室外壁土壤源的换热系统 (Heat exchange system utilizing deep foundation pit wall support and underground outdoor wall soil source ) 是由 郁峰 夏加洪 黄莉 沈颖 于 2021-01-25 设计创作，主要内容包括：本发明公开了一种利用深基坑墙支护和地下室外壁土壤源的换热系统,其涉及一种换热设备,旨在解决现有技术中土壤源热泵系统容易受到场地制约的技术问题,其技术方案要点包括热泵机组、终端设备以及与热泵机组和终端设备连接的输送管道、分别与热泵机组连接的进水管、出水管以及设置在深基坑墙和地下室外墙之间且与进水管和出水管连接的换热管组；将换热管组设置在深基坑墙和地下室外墙之间,在进行换热时,热泵机组将水沿着进水管进入换热管组中,土壤将热量传递给换热管组中的水,再沿着出水管输送给终端设备,通过将换热管组安装在地下室外侧与深基坑墙之间,从而可以减少占用的土地,有利于减少受到场地限制的可能性。(The invention discloses a heat exchange system utilizing a deep foundation pit wall support and an underground outdoor wall soil source, which relates to a heat exchange device and aims to solve the technical problem that a soil source heat pump system in the prior art is easily restricted by fields; the heat exchange tube set is arranged between the deep foundation pit wall and the basement outer wall, when heat exchange is carried out, water enters the heat exchange tube set along the water inlet tube by the heat pump set, the soil transfers heat to the water in the heat exchange tube set, the water is conveyed to the terminal equipment along the water outlet tube, and the heat exchange tube set is installed between the outer side of the underground room and the deep foundation pit wall, so that occupied land can be reduced, and the possibility of being limited by the site is reduced.)

1. The utility model provides an utilize heat transfer system of deep basal pit wall strut and underground outdoor wall soil source, includes heat pump set (1), terminal equipment (2) and is connected and is used for carrying water pipeline (9) with heat pump set (1) and terminal equipment (2), its characterized in that: the heat exchange system is characterized by further comprising a water inlet pipe (3) and a water outlet pipe (4) which are respectively connected with the heat pump unit (1), and a heat exchange pipe unit (5) which is arranged between the deep foundation pit wall (6) and the basement outer wall (7) and is connected with the water inlet pipe (3) and the water outlet pipe (4).

2. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 1, wherein: an installation space (8) for pouring concrete is reserved between the deep foundation pit wall (6) and the basement outer wall (7);

the heat exchange tube set (5) comprises a plurality of input tubes (50) and return tubes (51) which are arranged in the installation space (8), one ends of the input tubes (50) are connected with the water inlet tube (3), the other ends of the input tubes are connected with the return tubes (51), one ends, far away from the input tubes (50), of the return tubes (51) are connected with the water outlet tube (4), and the input tubes (50) and the return tubes (51) are arranged along the height direction of the basement outer wall (7).

3. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 2, wherein: be equipped with reinforcing bar net (52) between input tube (50) and back flow pipe (51), reinforcing bar net (52) all are equipped with connecting plate (56) in both sides back to each other, the both sides back to each other of connecting plate (56) are equipped with bracing piece (53) and connecting rod (54) of contradicting with deep basal pit wall (6) and basement outer wall (7) respectively.

4. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 2, wherein: and heat-conducting rubber pads (55) are arranged on the outer side walls of the input pipe (50) and the return pipe (51).

5. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 2, wherein: and a filter screen (40) is arranged on one side of the water outlet pipe (4) close to the heat pump unit (1).

6. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 5, wherein: the water outlet pipe (4) comprises a connecting pipe (41) connected with the return pipe (51) and an output pipe (42) connected with the heat pump unit (1);

the side wall of the output pipe (42) is provided with an installation gap (43) for installing the filter screen (40), and the outer side wall of the output pipe (42) is detachably provided with a sealing element (44) for sealing the connecting pipe (41) and the output pipe (42);

and a liquid flowmeter (45) is arranged on the output pipe (42) and between the filter screen (40) and the heat pump unit (1).

7. The heat exchange system utilizing the deep foundation pit wall support and the underground outdoor wall soil source according to claim 6, wherein: the outer diameter of the connecting pipe (41) is larger than that of the output pipe (42), and a connecting ring (46) is arranged at one end, close to the output pipe (42), of the connecting pipe (41);

sealing member (44) are including setting up seal cover (47) on output tube (42) lateral wall, the end wall of seal cover (47) is contradicted with the end wall of connecting pipe (41), one end that seal cover (47) are close to connecting pipe (41) is equipped with adapter sleeve (48) of cover on connecting pipe (41) lateral wall, be equipped with locking bolt (400) that a plurality of passed go-between (46) on the lateral wall of adapter sleeve (48), locking bolt (400) pass one end threaded connection of go-between (46) have lock nut (401).

8. The heat exchange system using the deep foundation pit wall support and the underground outdoor wall soil source according to claim 7, wherein: a sealing film (402) is arranged on the peripheral wall of the filter screen (40), and an annular groove (403) for the sealing film (402) to extend into is arranged on the outer side wall of one end, close to the output pipe (42), of the connecting pipe (41);

the connecting sleeve is characterized in that a plurality of grooves (404) are uniformly distributed on the inner side wall of the connecting sleeve (48) along the circumferential direction of the connecting sleeve, positioning rods (405) are arranged on the groove wall of each groove (404), a clamping block (407) is arranged on the side wall of each positioning rod (405) in a rotating mode, a torsion spring (406) is arranged on the side wall of each positioning rod (405), one end of each torsion spring (406) is connected with each positioning rod (405), the other end of each torsion spring is connected with each clamping block (407), an arc-shaped surface (408) for abutting a sealing film (402) on the groove bottom wall of the ring groove (403) is arranged on one side, close to the connecting pipe (41), of each clamping block (407), an abutting block (409) is arranged on one side, far away from the arc-shaped surface (408), a connecting groove (410) is annularly arranged on the outer side wall of the connecting ring (46), a through hole (411, the side wall of the rotating ring (412) is provided with a positioning notch (413) for the contact block (409) to extend into, and an extrusion block (414) abutting against the contact block (409) is arranged in the positioning notch (413).

Technical Field

The invention relates to a heat exchange device, in particular to a heat exchange system utilizing a deep foundation pit wall support and an underground outdoor wall soil source.

Background

In recent years, environmental problems are increasingly severe, energy conservation, environmental protection, greenness and low carbon are great trends, and in the field of building energy conservation, the energy-saving and environment-friendly soil source heat exchange system technology is emphasized by people; at present, the most applied technology of a soil source heat exchange system is a soil source heat pump heat exchange technology, a soil source heat pump is a device which completes heat exchange with the interior of a building through a pipeline system deeply buried around the building by utilizing the characteristic that the temperature of underground normal temperature soil is relatively stable, soil is used as a heat source and a cold source, and heat or cold is supplied to the building through a high-efficiency heat pump unit.

The Chinese patent with the publication number of CN207214516U discloses an underground soil cold and heat balance system suitable for a soil source heat pump in an extremely cold region, which comprises a solar heat collection system, a soil source heat pump system, an indoor heating system, a first electric valve and a second electric valve, wherein the solar heat collection system comprises a solar heat collector, an energy storage water tank and a solar circulating water pump; the soil source heat pump system comprises a soil source heat pump host, a soil source heat exchanger and a soil source circulating water pump; the indoor heating system comprises a heating circulating water pump and heating terminal equipment. The utility model discloses a cold and hot balanced system of underground soil suitable for extremely cold area ground source heat pump can reach the cold and hot balance of secret soil, improves ground source heat pump system's operation efficiency simultaneously, realizes that ground source heat pump system is stable, safe, efficient operation.

When using the cold and hot balanced system of underground soil among the prior art, the heat that solar collector gathered passes through solar energy circulating water pump and stores to the energy storage water tank, and the heat that the energy storage water tank stored is leading-in to soil source heat pump system through soil source circulating water pump, in practical application, when installing soil source heat pump system, need dig a hole in the underground, it is great to occupy the place, receives the restriction in place easily, remains to improve.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a heat exchange system utilizing a deep foundation pit wall support and an underground outdoor wall soil source, which has the advantages of reducing occupied land and reducing the possibility of being limited by a site.

The above object of the present invention is achieved by the following technical solutions:

the heat exchange system comprises a heat pump unit, a terminal device, a conveying pipeline connected with the heat pump unit and the terminal device, a water inlet pipe, a water outlet pipe and a heat exchange pipe set, wherein the water inlet pipe, the water outlet pipe and the heat exchange pipe set are respectively connected with the heat pump unit, the heat exchange pipe set is arranged between the deep foundation pit wall and the basement outer wall, and is connected with the water inlet pipe and the water outlet pipe.

By adopting the technical scheme, during construction, a gap is reserved between the outer wall of the basement and the wall of the deep foundation pit, the heat exchange tube group is arranged between the wall of the deep foundation pit and the outer wall of the basement, during heat exchange, water enters the heat exchange tube group along the water inlet pipe by the heat pump unit, soil transfers heat to the water in the heat exchange tube group, and then the water is conveyed to the terminal equipment along the water outlet pipe, and the heat exchange tube group is arranged between the outer side of the basement and the wall of the deep foundation pit, so that occupied land can be reduced, and the possibility of being limited by the site is favorably reduced; heat in the soil and water are used for exchanging heat to replace electric energy for refrigeration or heating, so that the electric energy consumption is reduced, energy is saved, and emission is reduced.

Furthermore, an installation space for pouring concrete is reserved between the deep foundation pit wall and the basement outer wall;

the heat exchange tube group includes input tube and back flow of a plurality of setting in installation space, input tube one end and advance water piping connection, the other end is connected with the back flow, the back flow is kept away from the one end and the play water piping connection of input tube, input tube and back flow all set up along the direction of height of basement outer wall.

Through adopting above-mentioned technical scheme, when the construction, insert input tube and back flow in the installation space, fill in the installation space with the concrete again to can fix input tube and back flow in the installation space, also can be with deep basal pit wall and basement outer wall fixed connection, with this stability that can increase input tube and back flow installation, also can increase the stability of basement outer wall.

Further, be equipped with the reinforcing bar net between input tube and the back flow, the reinforcing bar net deviates from both sides mutually and all is equipped with the connecting plate, the back of the body both sides of connecting plate are equipped with bracing piece and the connecting rod of contradicting with deep basal pit wall and basement outer wall respectively.

Through adopting above-mentioned technical scheme, when installation input tube and back flow, weld the reinforcing bar net between input tube and back flow to with bracing piece and connecting rod ligature on the reinforcing bar net, and put into installation space with input tube and back flow, fill into installation space with the concrete at last, through bracing piece, connecting rod and reinforcing bar net condense in the concrete, increase the compressive capacity of concrete, reduce input tube and back flow and receive the extruded possibility.

Furthermore, the outer side walls of the input pipe and the return pipe are provided with heat-conducting rubber pads.

By adopting the technical scheme, the heat-conducting rubber pad is wrapped in the input pipe and the return pipe, so that the possibility of pipeline breakage caused by extruding concrete after thermal barriers of the return pipe and the input pipe are generated is facilitated.

Furthermore, a filter screen is arranged on one side of the water outlet pipe close to the heat pump unit.

Through adopting above-mentioned technical scheme, utilize the filter screen to filter the water in the outlet pipe, be favorable to reducing the impurity that produces in the pipeline.

Furthermore, the water outlet pipe comprises a connecting pipe connected with the return pipe and an output pipe connected with the heat pump unit;

the side wall of the output pipe is provided with an installation gap for installing the filter screen, and the outer side wall of the output pipe is detachably provided with a sealing element for sealing the connecting pipe and the output pipe;

and a liquid flowmeter is arranged on the output pipe and between the filter screen and the heat pump unit.

Through adopting above-mentioned technical scheme, after using the filter screen for a long time, measure the water yield of output tube output through fluidflowmeter, when the water yield of fluidflowmeter output reduces, dismantle the sealing member this moment, dismantle the filter screen again, install new filter screen in the installation breach again, rethread sealing member is with connecting pipe and output tube connection to this can change the filter screen, is favorable to long-term effectual water to in the pipeline to be filtered.

Furthermore, the outer diameter of the connecting pipe is larger than that of the output pipe, and a connecting ring is arranged at one end of the connecting pipe close to the output pipe;

the sealing member is including setting up the seal cover on the output tube lateral wall, the end wall of seal cover is contradicted with the end wall of connecting pipe, the one end that the seal cover is close to the connecting pipe is equipped with the adapter sleeve of cover on the connecting pipe lateral wall, be equipped with the locking bolt that a plurality of passed the go-between on the lateral wall of adapter sleeve, the one end threaded connection that locking bolt passed the go-between has lock nut.

By adopting the technical scheme, when the filter screen is replaced, the locking nut is screwed off, the locking bolt is detached, the sealing sleeve is moved, the connecting sleeve is separated from the connecting pipe, then the filter screen is detached, a new filter screen is installed in the output pipe, the sealing sleeve is rotated, the sealing sleeve is abutted against the end wall of the connecting pipe, and finally the locking bolt penetrates through the connecting ring and is in threaded connection with the locking nut, so that the filter screen can be conveniently and quickly detached and replaced; the sealing sleeve is tightly propped against the end wall of the connecting pipe, so that the possibility of water leakage between the connecting pipe and the output pipe can be reduced.

Furthermore, a sealing film is arranged on the peripheral wall of the filter screen, and an annular groove for the sealing film to extend into is arranged on the outer side wall of one end, close to the output pipe, of the connecting pipe;

the utility model discloses a seal assembly, including adapter sleeve, recess, fixture, connecting rod, clamping ring, connecting ring lateral wall, connecting rod, clamping ring, locating piece, connecting sleeve inside wall and along its circumference equipartition have a plurality of recess, be equipped with the locating lever on the cell wall of recess, it is equipped with the fixture block to rotate on the lateral wall of locating lever, be equipped with the torsional spring on the lateral wall of locating lever, the one end and the locating lever of torsional spring are connected, the other end and the fixture block are connected, one side that the fixture block is close to the connecting pipe is equipped with and is used for conflicting the arcwall of seal membrane on the tank bottom wall of annular, one side that the arcwall was kept away from to the fixture block is equipped with the conflict piece, the go-between lateral wall is fitted with.

By adopting the technical scheme, when the filter screen is replaced, the sealing membrane is wrapped on the end wall of the connecting pipe and is paved in the annular groove, at the moment, the rotating ring rotates to drive the extrusion block to rotate in the positioning notch, when the extrusion block meets the abutting block, the extrusion block abuts against the abutting block to push the clamping block to rotate, the torsion spring is unfolded to store force, the clamping block abuts against the bottom wall of the annular groove, the arc-shaped surface can abut against the sealing membrane in the annular groove, the mounting stability of the filter screen on the output pipe can be improved, and the possibility that the filter screen moves to one side far away from the connecting pipe due to the impact of water flow is reduced; but also can increase the sealing performance of the sealing film to the connecting pipe and the output pipe and reduce the possibility of water leakage between the connecting pipe and the output pipe.

In conclusion, the invention has the following beneficial effects:

1. during construction, the heat exchange tube group is arranged between the deep foundation pit wall and the basement outer wall, water is input into the heat exchange tube group along the water inlet tube by using the heat pump unit, the heat of the water in the heat exchange tube group is exchanged with the heat in soil, the water enters the terminal equipment along the water outlet tube, and the heat exchange tube group is arranged between the deep foundation pit wall and the basement outer wall, so that the occupied land can be reduced, and the possibility of site limitation is reduced;

2. the heat-conducting rubber pad is utilized to reduce the possibility of pipeline fracture caused by extruding concrete when the input pipe and the return pipe are subjected to thermal barrier;

3. utilize the filter screen, can filter the impurity in the pipeline, be favorable to reducing the possibility that the pipeline takes place to block up.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment.

Fig. 2 is a schematic structural view of an installation space for an input pipe and a return pipe in the embodiment.

Fig. 3 is a sectional view taken along line a-a in fig. 1.

Fig. 4 is an enlarged view of a portion a in fig. 3.

Fig. 5 is a sectional view taken along line B-B in fig. 1.

Fig. 6 is an enlarged view of the portion B in fig. 5.

In the figure: 1. a heat pump unit; 2. a terminal device; 3. a water inlet pipe; 4. a water outlet pipe; 40. a filter screen; 41. a connecting pipe; 42. an output pipe; 43. installing a notch; 44. a seal member; 45. a liquid flow meter; 46. a connecting ring; 47. sealing sleeves; 48. connecting sleeves; 49. a kidney-shaped hole; 400. locking the bolt; 401. locking the nut; 402. a sealing film; 403. a ring groove; 404. a groove; 405. positioning a rod; 406. a torsion spring; 407. a clamping block; 408. an arc-shaped surface; 409. a contact block; 410. connecting grooves; 411. a through hole; 412. a rotating ring; 413. positioning the notch; 414. extruding the block; 415. a guide slope; 5. a heat exchange tube set; 50. an input tube; 51. a return pipe; 52. a reinforcing mesh; 53. a support bar; 54. a connecting rod; 55. a heat-conducting rubber pad; 56. a connecting plate; 6. a deep foundation pit wall; 7. a basement exterior wall; 8. an installation space; 9. a delivery conduit.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example (b):

referring to fig. 1, a heat exchange system using a deep foundation pit wall support and an underground outdoor wall soil source includes a heat pump unit 1, a terminal device 2, and a delivery pipe 9 connected to the heat pump unit 1 and the terminal device 2 and used for delivering water.

Referring to fig. 1, still include the inlet tube 3 who is connected with heat pump set 1, outlet pipe 4 and the heat exchange tube group 5 who is connected with inlet tube 3 and outlet pipe 4, leave the installation space 8 of pouring concrete between deep basal pit wall 6 and basement outer wall 7, heat exchange tube group 5 sets up in installation space 8, heat exchange tube group 5 includes input tube 50 and back flow 51 of a plurality of setting in installation space 8, input tube 50 and back flow 51 integrated into one piece just are the U type, input tube 50 one end is connected with inlet tube 3, the other end is connected with back flow 51, the one end that input tube 50 was kept away from to back flow 51 is connected with outlet pipe 4.

Referring to fig. 1, the input pipe 50 and the return pipe 51 are both arranged along the height direction of the basement exterior wall 7; when the basement external wall installation structure is installed, the input pipe 50 and the return pipe 51 are vertically installed in the installation space 8, concrete is filled into the installation space 8, so that the input pipe 50 and the return pipe 51 can be fixedly installed, heat is transferred to the input pipe 50 and the return pipe 51, the concrete is filled into the installation space 8, and the installation space 8 between the basement external wall 7 and the deep foundation pit wall 6 is filled, so that the stability of the basement external wall 7 can be improved, and the stability of a building is improved; in practice, in winter, heat in the soil is transferred to the water in the input pipe 50 and the return pipe 51, the heat pump unit 1 transfers the water to the terminal device 2 along the water outlet pipe 4 and the conveying pipe 9, the terminal device 2 transfers the heat to the building, in summer, the heat in the building is transferred to the water in the terminal device 2, the heat pump unit 1 delivers the hot water to the input pipe 50 and the return pipe 51 along the delivery pipe 9 and the inlet pipe 3, the water in the input pipe 50 and the return pipe 51 conducts the heat to the soil, so that the temperature of the water in the input pipe 50 and the return pipe 51 is reduced, the heat pump unit 1 then delivers the water to the terminal device 2 along the water outlet pipe 4 and the delivery pipe 9, thereby cooling the building, realizing heat exchange, utilizing the heat exchange tube set 5 arranged in the installation space 8, therefore, the occupied area can be reduced, the occupied area is reduced, and the possibility of being limited by the site is reduced; heat in the soil and water are used for exchanging heat to replace electric energy for refrigeration or heating, so that the electric energy consumption is reduced, energy is saved, and emission is reduced.

Referring to fig. 2, heat-conducting rubber pads 55 are arranged on the outer side walls of the input pipe 50 and the return pipe 51; through heat conduction cushion 55, when input tube 50 and back flow pipe 51 take place expend with heat and contract with cold, input tube 50 and back flow pipe 51 can find out the deformation, and at this moment, through the elastic material of heat conduction cushion 55 to can reduce input tube 50 and back flow pipe 51 and extrude the concrete and lead to input tube 50 and back flow pipe 51 to take place the possibility of breaking.

Referring to fig. 2, a reinforcing mesh 52 is arranged between an input pipe 50 and a return pipe 51, the reinforcing mesh 52 is arranged on the outer side wall of a heat-conducting rubber mat 55, connecting plates 56 are arranged on two opposite sides of the reinforcing mesh 52, and supporting rods 53 and connecting rods 54 which are abutted against the deep foundation pit wall 6 and the basement outer wall 7 are respectively arranged on two opposite sides of the connecting plates 56; when the concrete is filled into the installation space 8, the reinforcing mesh 52, the support rods 53 and the connecting rods 54 are used, so that the tensile property of the concrete can be increased, and the stability of the basement outer wall 7 can be increased.

Referring to fig. 3, a filter screen 40 is disposed on one side of the water outlet pipe 4 close to the heat pump unit 1.

Referring to fig. 3 and 4, the water outlet pipe 4 includes a connection pipe 41 connected to the return pipe 51 and an output pipe 42 connected to the heat pump unit 1, the connection pipe 41 and the output pipe 42 are both PE pipes, an installation notch 43 for installing the filter screen 40 is annularly arranged at one end of the output pipe 42 close to the connection pipe 41, one side of the filter screen 40 abuts against the installation notch 43, the other side abuts against the end wall of the connection pipe 41, and a sealing member 44 for sealing the connection pipe 41 and the output pipe 42 is detachably arranged on the outer side wall of the output pipe 42.

Referring to fig. 5, a liquid flow meter 45 is arranged on the output pipe 42 and between the filter screen 40 and the heat pump unit 1; utilize filter screen 40 to filter the impurity in outlet pipe 4, thereby the possibility of reducible impurity jam pipeline, detect the water yield of output tube 42 output through fluidflowmeter 45, when the output water yield reduces, surface filter screen 40 needs to be changed this moment, so dismantle sealing member 44, separation connecting pipe 41 and output tube 42, move out filter screen 40 from installation breach 43 again, install new filter screen 40 in installation breach 43 again, and contradict with connecting pipe 41 end wall, seal connecting pipe 41 and output tube 42 with sealing member 44 at last, thereby can convenient and fast dismantle the change with filter screen 40, thereby filter screen 40 can effectively filter for a long time.

Referring to fig. 4, the outer diameter of the connection pipe 41 is larger than that of the output pipe 42, a connection ring 46 is disposed at one end of the connection pipe 41 close to the output pipe 42, and a plurality of kidney-shaped holes 49 are uniformly distributed on the side wall of the connection ring 46 and along the circumferential direction thereof.

Referring to fig. 4, the sealing member 44 includes a sealing sleeve 47 and a connecting sleeve 48, the sealing sleeve 47 is slidably sleeved on the outer sidewall of the output tube 42, the end wall of the sealing sleeve 47 abuts against the end wall of the connecting tube 41, the connecting sleeve 48 is connected to one end of the sealing sleeve 47 close to the connecting tube 41, and the connecting sleeve 48 is slidably sleeved on the outer sidewall of the connecting tube 41.

Referring to fig. 4, a sealing film 402 is disposed on the peripheral wall of the filtering net 40, an annular groove 403 into which the sealing film 402 extends is disposed on the outer side wall of the connecting pipe 41 near the end of the outlet pipe 42, and the annular groove 403 is located on the side of the connecting ring 46 near the outlet pipe 42.

Referring to fig. 5 and 6, a plurality of grooves 404 are uniformly distributed on the inner side wall of the connecting sleeve 48 along the circumferential direction thereof, a positioning rod 405 is disposed on the wall of the groove 404, a locking block 407 is rotatably disposed on the side wall of the positioning rod 405, a torsion spring 406 is disposed on the side wall of the positioning rod 405, one end of the torsion spring 406 is connected to the positioning rod 405, the other end is connected to the locking block 407, an arc surface 408 for abutting the sealing film 402 against the bottom wall of the ring groove 403 is disposed on one side of the locking block 407 close to the connecting tube 41, an abutting block 409 is disposed on one side of the locking block 407 away from the arc surface 408, a connecting groove 410 (refer to fig. 4) is annularly disposed on the outer side wall of the connecting sleeve 48, a through hole 411 for the abutting block 409 to extend out is disposed on the bottom wall of the connecting groove 410, a rotating ring 412 is disposed, the side wall of the pressing block 414 is provided with a guide slope 415 for sliding up the interference block 409, and the thickness of the rotating ring 412 is greater than the depth of the connecting groove 410, thereby facilitating the rotation of the rotating ring 412.

Referring to fig. 4 and 6, a locking bolt 400 penetrating through the kidney-shaped hole 49 is arranged on the side wall of the rotating ring 412, one end of the locking bolt 400 penetrating through the kidney-shaped hole 49 is connected with a locking nut 401 in a threaded manner, and the locking nut 401 abuts against the side wall of the connecting ring 46; when the filter screen 40 needs to be replaced, the rotating ring 412 is rotated, so that the extrusion block 414 can be driven to be separated from the contact block 409, the torsion spring 406 is reset, the clamping block 407 is driven to rotate back to the groove 404, the locking nut 401 is screwed down, the connecting sleeve 48 and the sealing sleeve 47 are moved, the connecting pipe 41 and the output pipe 42 are separated, the filter screen 40 can be taken out, when a new filter screen 40 is replaced, the sealing film 402 on the filter screen 40 is wrapped on the end wall of the connecting pipe 41 and is laid in the ring groove 403, the sealing sleeve 47 is moved, the sealing sleeve 402 is tightly pressed on the end wall of the connecting pipe 41 by the sealing sleeve 47, the connecting sleeve 48 is sleeved on the connecting pipe 41, the locking bolt 400 extends into the kidney-shaped hole 49, and the locking nut 401 is screwed, so that the connecting sleeve 48 and the sealing sleeve 47 can be installed on the connecting; then the rotating ring 412 is rotated, the pressing block 414 presses the abutting block 409 to push the clamping block 407 to rotate, the torsion spring 406 expands to store power, and the arc surface 408 of the clamping block 407 can tightly press the sealing film 402 in the ring groove 403, so that the mounting stability of the filter screen 40 on the output pipe 42 can be improved, the sealing performance between the connecting pipe 41 and the output pipe 42 can be improved, and the possibility of water leakage between the connecting pipe 41 and the output pipe 42 can be reduced.

The implementation principle of the above embodiment is as follows: install heat exchange tube group 5 between deep basal pit wall 6 and basement outer wall 7, in use, utilize heat pump set 1 with water along the inlet tube 3 input heat exchange tube group 5, the heat of water and the heat in the soil in the heat exchange tube group 5 are exchanged, water again along outlet pipe 4 entering terminal equipment 2 provides the heat for the building, utilize heat exchange tube group 5 to install between deep basal pit wall 6 and basement outer wall 7 to this can reduce the occupation soil, is favorable to reducing the possibility that receives the place restriction.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.