A high-efficiency heat transfer device for a geothermal source heat pump heat exchanger

Abstract

The application relates to the technical field of heat exchangers, and particularly discloses a high-efficiency heat transfer device of a heat exchanger for a geothermal source heat pump, which comprises a heat exchanger shell, a water tank and a buried pipe; end covers are arranged at the two ends of the heat exchanger shell; heat exchange pipes are arranged in the heat exchanger shell; a cold source water inlet pipe and a cold source water outlet pipe are arranged on the outer wall of the heat exchanger shell; the water tank is arranged outside the heat exchanger shell; the buried pipe is buried in soil; a heat source water inlet pipe, which is in communication with the buried pipe, is arranged on the end cover at one end of the heat exchanger shell; a heat source water outlet pipe, which is in communication with the water tank, is arranged on the outer wall of the end cover at the other end of the heat exchanger shell; a water conveying mechanism is further arranged outside the heat exchanger shell; a descaling mechanism is arranged in the heat exchanger shell; in the long-time working process of the heat exchange pipes, the outer walls of the heat exchange pipes are cleaned by the descaling mechanism, and the scales on the outer walls of the heat exchange pipes are scraped off, so that the heat exchange efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchangers, in particular to a high-efficiency heat transfer device for a heat exchanger of a geothermal source heat pump. BACKGROUND

[0002] A geothermal heat pump is a heat supply and air conditioning system that uses shallow earth resources on the earth's surface as a cold and hot source. A heat exchanger is often provided in a geothermal heat pump system to convert heat. The heat exchanger is an energy-saving device that transfers heat between two or more fluid components at different temperatures. It transfers heat from a fluid with a higher temperature to a fluid with a lower temperature to achieve the specified temperature of the fluid. It is one of the main devices for improving energy utilization.

[0003] In the prior art, during long-term use of the heat exchanger, the outer wall of the heat exchange pipe in the heat exchanger is easily attached by scale due to long-term immersion in water. The heat exchange pipe wrapped by scale will cause the heat exchange efficiency of the heat exchanger to be greatly reduced. SUMMARY

[0004] The present application provides a high-efficiency heat transfer device for a heat exchanger of a geothermal source heat pump, which reduces the possibility of scale attachment to the outer wall of the heat exchange pipe and improves the heat exchange efficiency of the heat exchanger.

[0005] The high-efficiency heat transfer device for a heat exchanger of a geothermal source heat pump provided by the present application adopts the following technical solution:

[0006] A high-efficiency heat transfer device for a heat exchanger of a geothermal source heat pump, comprising a heat exchanger shell, a water tank and a buried pipe; end covers are installed on the outer sides of both ends of the heat exchanger shell, and heat exchange pipes are arranged inside the heat exchanger shell; the heat exchange pipes are connected to the interiors of the two end covers; cold source water inlet and outlet pipes are arranged on the outer wall of the heat exchanger shell; the water tank is arranged on the outer side of one side of the heat exchanger shell; the buried pipe is buried in the soil; a hot source water inlet pipe is arranged on the outer wall of the end cover at one end of the heat exchanger shell and is connected to one end of the buried pipe; a hot source water outlet pipe is arranged on the outer wall of the end cover at the end of the heat exchanger shell away from the hot source water inlet pipe and is connected to the water tank; a water conveying mechanism is further arranged on the outer side of the heat exchanger shell and can connect the water tank and the end of the buried pipe away from the hot source water inlet pipe; and a scale removal mechanism is arranged inside the heat exchanger shell and can clean the outer walls of the plurality of heat exchange pipes.

[0007] By adopting the above technical scheme, the external air conditioning system enters cold water into the heat exchanger shell through the cold source water inlet pipe, the water tank sends water into the buried pipe through the water conveying mechanism, absorbs heat in the soil through the buried pipe, then enters the water with certain heat into the heat exchanger shell through the heat source water inlet pipe, and finally transfers the heat in the hot water to the cold water through the heat exchange pipe to achieve the heat exchange purpose. In the long-term working process of the heat exchange pipe, the outer wall of the heat exchange pipe is cleaned by the descaling mechanism to scrape off the scale on the outer wall of the heat exchange pipe, thereby improving the heat exchange efficiency.

[0008] Preferably, the descaling mechanism comprises a first reciprocating screw rod and a motor; the first reciprocating screw rod is rotationally connected to the inner wall of the heat exchanger shell, and an annular body is arranged outside the first reciprocating screw rod in a threaded transmission matching mode; the annular body surrounds the outside of the plurality of heat exchange pipes, and a plurality of descaling sleeves are fixedly connected to the inner wall of the annular body and arranged outside the plurality of heat exchange pipes respectively; the inner wall of the descaling sleeve is in sliding fit with the outer wall of the heat exchange pipe; and the motor is mounted on the outer wall of any one of the two end covers, and the output end of the motor is coaxially fixedly connected to one end of the first reciprocating screw rod.

[0009] By adopting the above technical scheme, when the scale on the outer wall of the heat exchange pipe is scraped, the motor is started to drive the first reciprocating screw rod to rotate, so as to drive the annular body to move along the outer wall of the heat exchange pipe with the descaling sleeve, and the descaling sleeve scrapes the outer wall of the heat exchange pipe during the movement, thereby reducing the possibility of adhering more scale on the outer wall of the heat exchange pipe and improving the heat exchange efficiency of the heat exchange pipe.

[0010] Preferably, a plurality of cleaning brush sleeves are rotationally connected to the inner wall of one end of the heat exchanger shell; the plurality of cleaning brush sleeves are arranged outside one end of the plurality of heat exchange pipes respectively, each cleaning brush sleeve is provided with bristles on the inner circumferential surface thereof, and a first ring gear is coaxially fixedly connected to the outer circumferential surface of each cleaning brush sleeve; and the heat exchanger shell is further provided with a first transmission assembly for driving the plurality of first ring gears to rotate by the first reciprocating screw rod.

[0011] By adopting the above technical scheme, the first reciprocating screw rod drives the plurality of first ring gears and the cleaning brush sleeves to rotate through the first transmission assembly during the rotation, and when the annular body moves the descaling sleeve into the cleaning brush sleeve, the rotating bristles in the cleaning brush sleeve clean the outer surface of the descaling sleeve, thereby reducing the possibility of adhering scale on the descaling sleeve and ensuring the cleaning effect of the descaling sleeve on the heat exchange pipe.

[0012] Preferably, the first transmission assembly comprises a second ring gear, a third ring gear and a spur gear; the second ring gear surrounds the outside of the plurality of first ring gears, the second ring gear is in rotational fit with the inner wall of the end portion of the heat exchanger shell, the third ring gear is coaxially fixedly connected to the inner wall of the second ring gear, and the third ring gear is in meshing fit with the plurality of first ring gears; and the spur gear is coaxially fixedly connected to the outer wall of the first reciprocating screw rod close to the second ring gear, and the spur gear is in meshing fit with the second ring gear.

[0013] By adopting the technical scheme, the first reciprocating screw rod drives the second gear ring and the third gear ring to rotate through the meshing of the straight gear and the second gear ring in the rotating process of the first reciprocating screw rod, and the third gear ring drives the plurality of cleaning brush sleeves to rotate through the meshing with the first gear ring in the rotating process of the third gear ring, so that the kinetic energy is transmitted in the rotating process of the first reciprocating screw rod.

[0014] Preferably, the water conveying mechanism comprises a pump body; the pump body is arranged outside the heat exchanger shell, a water inlet pipe in communication with the water tank is fixed to an input end of the pump body, and a water outlet pipe in communication with the buried pipe away from the water inlet pipe of the heat source is fixed to an output end of the pump body.

[0015] By adopting the technical scheme, the pump body is started to pump out the water in the water tank and convey the water to the buried pipe through the water inlet pipe and the water outlet pipe to absorb the heat in the soil, so that the water with a certain amount of heat is conveyed to the heat exchanger shell for heat exchange work.

[0016] Preferably, a filter screen is arranged on the inner wall of the end portion of the heat exchange pipe close to the water inlet pipe of the heat source.

[0017] By adopting the technical scheme, the filter screen can filter the water entering the heat exchange pipe, reduce the possibility of scale on the inner wall of the heat exchange pipe, and ensure the heat exchange efficiency of the heat exchange pipe.

[0018] Preferably, a first rotating shaft is rotatably connected to the outer wall of the end portion of the heat exchanger shell close to the filter screen; a cleaning brush in contact with the filter screen is fixed to the outer wall of the first rotating shaft; and a second transmission assembly capable of driving the first rotating shaft to rotate is arranged at the end portion of the first reciprocating screw rod.

[0019] By adopting the technical scheme, the first reciprocating screw rod drives the first rotating shaft and the cleaning brush to rotate through the second transmission assembly in the rotating process of the first reciprocating screw rod, so that the cleaning brush cleans the filter screen, reduces the possibility of the mesh of the filter screen being blocked, and ensures the water permeability of the filter screen.

[0020] Preferably, the second transmission assembly comprises a first sprocket, a second sprocket and a first chain; the first sprocket is coaxially fixed to the outer wall of the end portion of the first rotating shaft; the second sprocket is coaxially fixed to the outer wall of the end portion of the first reciprocating screw rod close to the first rotating shaft; and the first chain is sleeved outside the first sprocket and the second sprocket, and the first chain drives the first sprocket and the second sprocket to move together.

[0021] By adopting the technical scheme, the first reciprocating screw rod drives the first rotating shaft to rotate in the rotating process of the first reciprocating screw rod under the cooperation of the first sprocket, the second sprocket and the first chain, so that the kinetic energy is transmitted in the rotating process of the first reciprocating screw rod.

[0022] Preferably, a second reciprocating screw is rotatably connected to the inner wall of the buried pipe and arranged along the axial direction of the buried pipe; an annular plate is sleeved on the outside of the second reciprocating screw and is threadedly engaged with the second reciprocating screw; the annular plate is slidably engaged with the inner wall of the buried pipe; and a power component is provided at one end of the second reciprocating screw to enable the second reciprocating screw to rotate.

[0023] By adopting the above technical solution, when water flows in the buried pipe, the power component can drive the second reciprocating screw to rotate, causing the ring plate to move along the axial direction of the second reciprocating screw. During the movement, the ring plate scrapes the inner wall of the buried pipe, reducing the possibility of excessive scale formation on the inner wall of the buried pipe.

[0024] Preferably, the power assembly includes a protective shell, a second rotating shaft, and water turbine blades; the protective shell is fixed to the inner wall of the buried pipe; one end of the second reciprocating screw extends into the protective shell; the second rotating shaft is rotatably connected to the inner wall of the protective shell along the axial direction of the buried pipe, and the end of the second rotating shaft away from the second reciprocating screw extends out of the protective shell; the water turbine blades are fixed to the outer wall of the second rotating shaft; a third sprocket is coaxially fixed to the end of the second rotating shaft located inside the protective shell; a fourth sprocket is coaxially fixed to the end of the second reciprocating screw located inside the protective shell; the third sprocket and the fourth sprocket are fitted with the same second chain; the second chain causes the third sprocket and the fourth sprocket to move together.

[0025] By adopting the above technical solution, when water flows through the water turbine blades in the buried pipe, the water can be used as a power source to drive the water turbine blades and the second shaft to rotate. With the cooperation of the third sprocket, the fourth sprocket and the second chain, the second shaft drives the second reciprocating screw to rotate. Using the flowing water as a power source to drive the second reciprocating screw can reduce energy consumption.

[0026] In summary, this application has the following beneficial effects:

[0027] 1. When it is necessary to clean the scale on the outer wall of the heat exchange tube, start the motor to drive the first reciprocating screw to rotate, causing the ring body to drive multiple descaling sleeves to slide along the outer wall of the heat exchange tube, scrape the outer wall of the heat exchange tube, remove the scale on the outer wall of the heat exchange tube, and improve the heat exchange efficiency of the heat exchange tube.

[0028] 2. During the rotation of the first reciprocating screw, multiple cleaning sleeves will be driven to rotate through the first transmission component. When the descaling sleeve is driven to extend into the cleaning sleeve, the rotating bristles inside the cleaning sleeve will clean the outer circumference of the descaling sleeve, reducing the possibility of scale adhering to the outside of the descaling sleeve and ensuring the descaling sleeve's scraping effect on scale.

[0029] 3. The first reciprocating wire rod drives the first rotating shaft to rotate through the second transmission assembly during rotation, prompting the cleaning brush to clean the filter screen arranged on the inner wall of the end portion of the heat exchange pipe, thereby reducing the possibility of the filter screen being blocked by impurities and ensuring the water permeability of the filter screen. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is a structural schematic diagram of a high-efficiency heat transfer device of a heat exchanger for a geothermal source heat pump;

[0031] Figure 2 is a schematic diagram of the internal structure of the heat exchanger shell in the present application;

[0032] Figure 3 is a schematic diagram of the internal structure of the buried pipe in the present application;

[0033] Figure 4 is a schematic diagram of the cooperation structure of the second reciprocating wire rod and the power assembly in the present application;

[0034] Figure 5 is a schematic diagram of the structure of the descaling mechanism in the present application;

[0035] Figure 6 is a schematic diagram of the cooperation structure of the first transmission assembly and the plurality of cleaning brush sleeves in the present application;

[0036] Figure 7 is a schematic diagram of the cooperation structure of the heat exchanger shell, the heat exchange pipe, and the cleaning brush in the present application;

[0037] Figure 8 is a schematic diagram of the transmission cooperation structure of the first reciprocating wire rod and the first rotating shaft in the present application.

[0038] BRIEF DESCRIPTION OF DRAWINGS: 1. Heat exchanger shell; 11. End cover; 12. Cold source water inlet pipe; 13. Cold source water outlet pipe; 14. Heat source water inlet pipe; 15. Heat source water outlet pipe; 16. Cleaning brush sleeve; 161. Brush; 17. First gear ring; 18. First rotating shaft; 181. Cleaning brush; 2. Water tank; 3. Buried pipe; 31. Second reciprocating wire rod; 32. Ring plate; 33. Power assembly; 331. Protective shell; 332. Second rotating shaft; 333. Water wheel blade; 334. Third sprocket; 335. Fourth sprocket; 336. Second chain; 4. Heat exchange pipe; 41. Filter screen; 5. Water delivery mechanism; 51. Pump body; 52. Water inlet pipe; 53. Water outlet pipe; 6. Descaling mechanism; 61. First reciprocating wire rod; 62. Motor; 63. Ring body; 64. Descaling sleeve; 65. First transmission assembly; 651. Second gear ring; 652. Third gear ring; 653. Spur gear; 66. Second transmission assembly; 661. First sprocket; 662. Second sprocket; 663. First chain. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below with reference to the accompanying drawings. Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "upper," "lower," "bottom," and "top" used in the following description refer to directions in the drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component, respectively.

[0040] This invention discloses a high-efficiency heat transfer device for geothermal heat pumps, such as... Figure 1 and Figure 2 As shown, it includes a heat exchanger shell 1, a water tank 2, a buried pipe 3 and a water conveying mechanism 5. Both ends of the heat exchanger shell 1 are detachably installed with end caps 11. The heat exchanger shell 1 is provided with multiple heat exchange tubes 4 arranged along the axial direction of the heat exchanger shell 1 and connected to the end caps 11. The multiple heat exchange tubes 4 are arranged in a circle along the outer periphery of the axis of the heat exchanger shell 1.

[0041] A cold source inlet pipe 12 and a cold source outlet pipe 13 are provided on the outer wall of the heat exchanger shell 1. A water tank 2 is located outside one end of the heat exchanger shell 1. A heat source outlet pipe 15 is provided on the side wall of the water tank 2 and is connected to the end cap 11 at one end of the heat exchanger shell 1. A buried pipe 3 is buried in the soil. A heat source inlet pipe 14 is provided at the outlet end of the buried pipe 3. The heat source inlet pipe 14 is connected to the end cap 11 at the end of the heat exchanger shell 1 away from the heat source outlet pipe 15. A water conveying mechanism 5 is located on one side of the water tank 2. The water conveying mechanism 5 can input the water inside the water tank 2 into the buried pipe 3 through the inlet end of the buried pipe 3.

[0042] The external air conditioning system sends cold water into the heat exchanger shell 1 through the cold source inlet pipe 12. The water tank 2 sends water into the buried pipe 3 through the water conveying mechanism 5. The buried pipe 3 absorbs heat from the soil, and then the water with a certain amount of heat is sent into the heat exchanger shell 1 through the heat source inlet pipe 14. Finally, the heat in the hot water is transferred to the cold water through the heat exchange pipe 4 to achieve the purpose of heat exchange.

[0043] like Figure 1 and Figure 2 As shown, the water conveying mechanism 5 includes a pump body 51, an inlet pipe 52, and an outlet pipe 53. The pump body 51 is located outside the water tank 2. One end of the inlet pipe 52 is fixed to the input end of the pump body 51, and the other end of the inlet pipe 52 is fixed to the side wall of the water tank 2 and communicates with the water tank 2. One end of the outlet pipe 53 is fixed to the output end of the pump body 51, and the other end of the outlet pipe 53 is detachably installed on the outer wall of the inlet end of the buried pipe 3 and communicates with the buried pipe 3.

[0044] Starting the pump body 51 can draw water from the water tank 2 and transport it through the inlet pipe 52 and outlet pipe 53 to the buried pipe 3 to absorb heat from the soil, so that water with a certain amount of heat can be transported to the heat exchanger shell 1 for heat exchange.

[0045] like Figure 1And Figure 3 As shown in the figure, the second reciprocating screw rod 31 is rotationally connected to the inner wall of the buried pipe 3 and arranged along the axial direction of the buried pipe 3. The ring plate 32 is slidingly fitted to the inner wall of the buried pipe 3 and externally sleeved on the second reciprocating screw rod 31. The ring plate 32 is in threaded transmission cooperation with the second reciprocating screw rod 31. The power assembly 33 is arranged on the side of the second reciprocating screw rod 31 close to the water inlet end of the buried pipe 3 and can drive the second reciprocating screw rod 31 to rotate.

[0046] The power assembly 33 in the buried pipe 3 can drive the second reciprocating screw rod 31 to rotate, so as to promote the ring plate 32 to move along the axial direction of the second reciprocating screw rod 31 and scrape the inner wall of the buried pipe 3, thereby reducing the possibility of more scale on the inner wall of the buried pipe 3.

[0047] As shown in the figure, Figure 3 And Figure 4 The power assembly 33 includes a protective shell 331, a second rotating shaft 332, a water wheel blade 333, a third chain wheel 334, a fourth chain wheel 335, and a second chain 336. The protective shell 331 is fixedly connected to the inner wall of the top end of the buried pipe 3. The second rotating shaft 332 is rotationally connected to the inner wall of the protective shell 331 along the axial direction of the buried pipe 3. The end of the second rotating shaft 332 away from the second reciprocating screw rod 31 extends to the outside of the protective shell 331. The water wheel blade 333 is fixedly connected to the outer wall of the end of the second rotating shaft 332 extending to the outside of the protective shell 331. The third chain wheel 334 is coaxially fixedly connected to the outer wall of the end of the second rotating shaft 332 located in the protective shell 331. The end of the second reciprocating screw rod 31 close to the protective shell 331 extends to the inside of the protective shell 331 and rotationally cooperates with the inner wall of the protective shell 331. The fourth chain wheel 335 is coaxially fixedly connected to the outer wall of the end of the second reciprocating screw rod 31 extending to the inside of the protective shell 331. When the second chain 336 is sleeved on the outside of the third chain wheel 334 and the fourth chain wheel 335, the third chain wheel 334 and the fourth chain wheel 335 are linked.

[0048] When the water in the buried pipe 3 flows through the water wheel blade 333, the water can drive the second rotating shaft 332 and the water wheel blade 333 to rotate as a power source. Under the cooperation of the third chain wheel 334, the fourth chain wheel 335, and the second chain 336, the second rotating shaft 332 will drive the second reciprocating screw rod 31 to rotate, thereby realizing the rotation of the second reciprocating screw rod 31 driven by the flowing water as a power source and reducing the use of energy.

[0049] As shown in the figure, Figure 2 And Figure 5As shown, the heat exchanger shell 1 is internally provided with a descaling mechanism 6 capable of cleaning the scale on the outer wall of the heat exchange pipe 4, the descaling mechanism 6 comprises a motor 62, a first reciprocating screw rod 61 and a ring body 63, the motor 62 is installed on the outer wall of the end cover 11 connected with the hot water outlet pipe 15 of the heat source, the first reciprocating screw rod 61 is coaxially fixed on the output end of the motor 62, the first reciprocating screw rod 61 extends horizontally along the axis of the heat exchanger shell 1 into the interior of the heat exchanger shell 1, the ring body 63 is sleeved outside the first reciprocating screw rod 61, the ring body 63 is in threaded transmission cooperation with the first reciprocating screw rod 61, the ring body 63 surrounds the outside of the plurality of heat exchange pipes 4, a plurality of descaling sleeve pipes 64 are fixedly connected to the inner wall of the ring body 63, the plurality of descaling sleeve pipes 64 are arranged in a circular manner along the axis of the ring body 63 and are respectively sleeved outside the plurality of heat exchange pipes 4, and the descaling sleeve pipes 64 are in sliding cooperation with the outer wall of the heat exchange pipes 4.

[0050] When the motor 62 drives the first reciprocating screw rod 61 to rotate, the ring body 63 drives the descaling sleeve pipes 64 to move along the outer wall of the heat exchange pipe 4, so as to clean the outer wall of the heat exchange pipe 4, thereby reducing the possibility of more scale adhering to the outer wall of the heat exchange pipe 4 and improving the heat exchange efficiency of the heat exchange pipe 4.

[0051] As shown in Figure 2 and Figure 6 , a plurality of cleaning brush sleeve pipes 16 respectively sleeved outside one end of the heat exchange pipe 4 are rotationally connected to the inner wall of both ends of the heat exchanger shell 1, the inner circumferential surface of each cleaning brush sleeve pipe 16 is provided with a plurality of bristles 161, and the outer circumferential surface of each cleaning brush sleeve pipe 16 is coaxially fixedly connected with a first ring gear 17, and the interior of the heat exchanger shell 1 is further provided with a pair of first transmission assemblies 65, which can drive the plurality of first ring gears 17 located on the outer wall of the cleaning brush sleeve pipe 16 to rotate respectively.

[0052] The first reciprocating screw rod 61 drives the plurality of cleaning brush sleeve pipes 16 to rotate through the first transmission assembly 65 in the rotating process, when the ring body 63 drives the descaling sleeve pipes 64 to move into the interior of the cleaning brush sleeve pipe 16, the bristles 161 rotating in the cleaning brush sleeve pipe 16 clean the outer surface of the descaling sleeve pipes 64, thereby reducing the possibility of scale adhering to the descaling sleeve pipes 64 and ensuring the cleaning effect of the descaling sleeve pipes 64.

[0053] As shown in Figure 2 and Figure 6 , the first transmission assembly 65 comprises a second ring gear 651, a third ring gear 652 and a spur gear 653, the second ring gear 651 is rotationally connected to the inner wall of one end of the heat exchanger shell 1, the second ring gear 651 surrounds the outside of the plurality of cleaning brush sleeve pipes 16, the third ring gear 652 is coaxially fixedly connected to the inner wall of the second ring gear 651, the third ring gear 652 is in meshing cooperation with the plurality of first ring gears 17, and the spur gear 653 is coaxially fixedly connected to the outer wall of the end portion of the first reciprocating screw rod 61 close to the second ring gear 651 and is in meshing cooperation with the second ring gear 651.

[0054] The first reciprocating screw rod 61 rotates to drive the spur gear 653 to rotate, and the spur gear 653 and the second gear ring 651 are engaged to drive the second gear ring 651 and the third gear ring 652 to rotate synchronously, and the third gear ring 652 and the first gear ring 17 are engaged to drive the third gear ring 652 to rotate and drive the plurality of cleaning sleeve pipes 16 located on the same side of the third gear ring 652 to rotate.

[0055] As shown in Figure 2 , Figure 7 and Figure 8 , each heat exchange pipe 4 is provided with a filter screen 41 on the inner wall of the end portion close to the cold water inlet pipe 14, the heat exchanger shell 1 is coaxially connected with a first rotating shaft 18 on the outer wall of the end portion close to the filter screen 41, the first rotating shaft 18 is fixedly connected with a cleaning brush 181 which can contact the filter screen 41, and the first reciprocating screw rod 61 is provided with a second transmission assembly 66 at the end portion close to the first rotating shaft 18, and the second transmission assembly 66 can drive the first rotating shaft 18 to rotate by driving the first reciprocating screw rod 61.

[0056] The filter screen 41 can filter the recycled water to reduce the possibility of impurities entering the heat exchange pipe 4, and the first reciprocating screw rod 61 can drive the first rotating shaft 18 to rotate by the first transmission assembly 65 during rotation, so as to drive the cleaning brush 181 to clean the filter screen 41 and reduce the possibility of the mesh of the filter screen 41 being blocked.

[0057] As shown in Figure 7 and Figure 8 , the second transmission assembly 66 includes a first sprocket 661, a second sprocket 662 and a first chain 663, the first sprocket 661 is coaxially fixedly connected to the outer wall of the end portion of the first rotating shaft 18, the second sprocket 662 is coaxially fixedly connected to the outer wall of the end portion of the first reciprocating screw rod 61 close to the first rotating shaft 18, and the first chain 663 is sleeved on the outside of the first sprocket 661 and the second sprocket 662, and the first chain 663 drives the first sprocket 661 and the second sprocket 662 to move together.

[0058] The first reciprocating screw rod 61 can drive the first rotating shaft 18 to rotate by the cooperation of the first sprocket 661, the second sprocket 662 and the first chain 663 during rotation, so as to conveniently realize the transmission of kinetic energy during the rotation of the first reciprocating screw rod 61.

[0059] Working principle: the external air conditioning system sends cold water into the heat exchanger shell 1 through the cold water inlet pipe 12, the water in the water tank 2 is sent into the ground pipe 3 through the pump body 51, and the water absorbs heat from the soil when flowing in the ground pipe 3 to have a certain amount of heat, and then the water with a certain amount of heat enters the heat exchange pipe 4 in the heat exchanger shell 1 through the hot water inlet pipe 14, and the heat in the hot water is transferred to the cold water through the heat exchange pipe 4 to realize the heat exchange work of the heat exchanger;

[0060] When it is necessary to clean the scale on the outer wall of the heat exchange pipe 4, the motor 62 is started to drive the first reciprocating screw rod 61 to rotate, so as to drive the ring body 63 to drive the plurality of scale-removing sleeves 64 to slide along the outer wall of the heat exchange pipe 4, clean the outer wall of the heat exchange pipe 4, remove the scale on the outer wall of the heat exchange pipe 4, and improve the heat exchange efficiency of the heat exchange pipe 4.

[0061] The first reciprocating screw rod 61 drives the cleaning brush sleeve 16 outside the heat exchange pipe 4 to rotate through the first transmission assembly 65 during rotation. When the ring body 63 drives the scale-removing sleeve 64 to move towards the cleaning brush sleeve 16 and gradually extend into the cleaning brush sleeve 16, the bristles 161 arranged in the cleaning brush sleeve 16 clean the outer periphery of the scale-removing sleeve 64, reduce the possibility that the scale removed by the scale-removing sleeve 64 adheres to the surface of the scale-removing sleeve 64, and ensure the scale-removing effect of the scale-removing sleeve 64.

[0062] The first reciprocating screw rod 61 drives the first rotating shaft 18 and the cleaning brush 181 to rotate through the second transmission assembly 66 during rotation, so as to drive the cleaning brush 181 to clean the filter screen 41 arranged on the inner wall of the end portion of the heat exchange pipe 4, reduce the possibility that the filter screen 41 is blocked by impurities, and ensure the water permeability of the filter screen 41.

[0063] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered by the protection scope of the present application.

Claims

1. A high-efficiency heat transfer device for a geothermal heat pump, characterized in that: The system includes a heat exchanger shell (1), a water tank (2), and a buried pipe (3); both ends of the heat exchanger shell (1) are equipped with end caps (11), and a heat exchange tube (4) is installed inside the heat exchanger shell (1); the heat exchange tube (4) connects to the inside of the two end caps (11); a cold source inlet pipe (12) and a cold source outlet pipe (13) are installed on the outer wall of the heat exchanger shell (1); the water tank (2) is located on one side of the heat exchanger shell (1); the buried pipe (3) is buried in the soil; and the end cap at one end of the heat exchanger shell (1) is... (11) A heat source inlet pipe (14) connected to one end of the buried pipe (3) is provided on the outer wall; a heat source outlet pipe (15) connected to the water tank (2) is provided on the outer wall of the end cap (11) of the heat exchanger shell (1) away from the heat source inlet pipe (14); a water conveying mechanism (5) that can connect the water tank (2) and the end of the buried pipe (3) away from the heat source inlet pipe (14) is also provided on the outside of the heat exchanger shell (1); a descaling mechanism (6) that can clean the outer walls of multiple heat exchange tubes (4) is provided inside the heat exchanger shell (1); The descaling mechanism (6) includes a first reciprocating screw (61) and a motor (62); the first reciprocating screw (61) is rotatably connected to the inner wall of the heat exchanger shell (1), and an annular body (63) is sleeved on the outside of the first reciprocating screw (61) and threadedly engaged with the first reciprocating screw (61); the annular body (63) surrounds the outside of a plurality of heat exchange tubes (4), and a plurality of descaling sleeves (64) are fixedly connected to the inner wall of the annular body (63) respectively sleeved on the outside of the plurality of heat exchange tubes (4); the inner wall of the descaling sleeve (64) is slidably engaged with the outer wall of the heat exchange tubes (4); the motor (62) is installed on the outer wall of any one of the two end caps (11), and the output end of the motor (62) is coaxially fixedly connected to one end of the first reciprocating screw (61); Multiple cleaning sleeves (16) are rotatably connected to the inner wall of one end of the heat exchanger shell (1); the multiple cleaning sleeves (16) are respectively sleeved on the outside of one end of multiple heat exchange tubes (4), each cleaning sleeve (16) is provided with bristles (161) on its inner circumferential surface, and each cleaning sleeve (16) is coaxially fixed with a first gear ring (17) on its outer circumferential surface; the heat exchanger shell (1) is also provided with a first transmission assembly (65) that enables the first reciprocating screw (61) to drive the multiple first gear rings (17) to rotate. The first transmission assembly (65) includes a second gear ring (651), a third gear ring (652), and a spur gear (653); the second gear ring (651) surrounds the outside of a plurality of first gear rings (17), the second gear ring (651) is rotatably engaged with the inner wall of the end of the heat exchanger housing (1), the third gear ring (652) is coaxially fixed to the inner wall of the second gear ring (651), and the third gear ring (652) meshes with a plurality of first gear rings (17); the spur gear (653) is coaxially fixed to the outer wall of the first reciprocating screw (61) near the second gear ring (651), and the spur gear (653) meshes with the second gear ring (651).

2. The high-efficiency heat transfer device for a geothermal heat pump according to claim 1, characterized in that: The water conveying mechanism (5) includes a pump body (51); the pump body (51) is located outside the heat exchanger shell (1), the pump body (51) has an inlet pipe (52) fixedly connected to the water tank (2) at the input end, and an outlet pipe (53) fixedly connected to the end of the buried pipe (3) away from the heat source inlet pipe (14) at the output end.

3. The high-efficiency heat transfer device for a geothermal heat pump according to claim 1, characterized in that: A filter screen (41) is installed on the inner wall of the end of the heat exchange tube (4) near the heat source inlet pipe (14).

4. The high-efficiency heat transfer device for a geothermal heat pump according to claim 3, characterized in that: The heat exchanger housing (1) is rotatably connected to the outer wall of the end near the filter screen (41) with a first rotating shaft (18); a cleaning brush (181) that can contact the filter screen (41) is fixed on the outer wall of the first rotating shaft (18); and a second transmission assembly (66) that can drive the first rotating shaft (18) to rotate is provided at the end of the first reciprocating screw (61).

5. A high-efficiency heat transfer device for a geothermal heat pump according to claim 4, characterized in that: The second transmission assembly (66) includes a first sprocket (661), a second sprocket (662), and a first chain (663); the first sprocket (661) is coaxially fixed to the outer wall of the end of the first rotating shaft (18); the second sprocket (662) is coaxially fixed to the outer wall of the end of the first reciprocating screw (61) near the first rotating shaft (18); the first chain (663) is sleeved outside the first sprocket (661) and the second sprocket (662), and the first chain (663) causes the first sprocket (661) and the second sprocket (662) to move together.

6. The high-efficiency heat transfer device for a geothermal heat pump according to claim 1, characterized in that: A second reciprocating screw (31) is rotatably connected to the inner wall of the buried pipe (3) and arranged along the axial direction of the buried pipe (3); an annular plate (32) is sleeved on the outside of the second reciprocating screw (31) and is threadedly engaged with the second reciprocating screw (31); the annular plate (32) is slidably engaged with the inner wall of the buried pipe (3); a power component (33) is provided at one end of the second reciprocating screw (31) to enable the second reciprocating screw (31) to rotate.

7. A high-efficiency heat transfer device for a geothermal heat pump according to claim 6, characterized in that: The power assembly (33) includes a protective shell (331), a second rotating shaft (332), and water turbine blades (333); the protective shell (331) is fixed to the inner wall of the buried pipe (3); one end of the second reciprocating screw (31) extends into the protective shell (331); the second rotating shaft (332) is rotatably connected to the inner wall of the protective shell (331) along the axial direction of the buried pipe (3), and the end of the second rotating shaft (332) away from the second reciprocating screw (31) extends out of the protective shell (331); the water turbine blades (333) 3) Fixed to the outer wall of the second rotating shaft (332); the end of the second rotating shaft (332) located inside the protective shell (331) is coaxially fixed to the third sprocket (334); the end of the second reciprocating screw (31) located inside the protective shell (331) is coaxially fixed to the fourth sprocket (335); the third sprocket (334) and the fourth sprocket (335) are fitted with the same second chain (336); the second chain (336) makes the third sprocket (334) and the fourth sprocket (335) move together.

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