Efficient heat transfer device of heat exchanger for geothermal source heat pump

Abstract

The invention relates to the technical field of heat exchangers, and particularly discloses an efficient 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 installed at the two ends of the heat exchanger shell, and 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 communicated with the buried pipe is arranged on the end cover at one end of the heat exchanger shell, and a heat source water outlet pipe communicated with the water tank is arranged on the outer wall of the end cover at the other end; 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 pipe, the outer wall of the heat exchange pipe is cleaned through the descaling mechanism, water scales on the outer wall of the heat exchange pipe are scraped off, and the heat exchange efficiency is improved.

Description

Technical Field

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

[0002] A geothermal heat pump is a heating and air-conditioning system that uses shallow geothermal resources on the earth's surface as a source of heat and cold. A heat exchanger is often installed in a geothermal heat pump system to convert heat. A heat exchanger is an energy-saving device that transfers heat between materials using two or more fluids at different temperatures. It transfers heat from a higher-temperature fluid to a lower-temperature fluid so that the temperature of the fluid reaches the specified index. It is one of the main devices for improving energy utilization.

[0003] In the prior art, during the long-term use of the heat exchanger, the heat exchange tubes in the heat exchanger are in water for a long time, and the outer wall of the heat exchange tubes is easily attached with scale. The wrapped heat exchange tubes will cause the heat exchange efficiency of the heat exchanger to be greatly reduced. Summary of the invention

[0004] The present application provides a high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump, which has the effect of reducing the possibility of scale adhering to the outer wall of a heat exchange tube and improving the heat exchange efficiency of the heat exchanger.

[0005] The present application provides a high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump, which adopts the following technical solution: A high-efficiency heat transfer device for a geothermal heat pump heat exchanger comprises a heat exchanger shell, a water tank and a buried pipe; end caps are installed on the outside 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 inside of the two end caps; 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 on the outside of one side of the heat exchanger shell; the buried pipe is buried in the soil; a heat source water inlet pipe connected to one end of the buried pipe is arranged on the outer wall of the end cap at one end of the heat exchanger shell; a heat source water outlet pipe connected to the water tank is arranged on the outer wall of the end cap of the heat exchanger shell away from the end of the heat source water inlet pipe; a water conveying mechanism that can connect the water tank with the end of the buried pipe away from the heat source water inlet pipe is also arranged on the outside of the heat exchanger shell; a descaling mechanism that can clean the outer walls of multiple heat exchange tubes is arranged in the heat exchanger shell.

[0006] By adopting the above technical solution, the external air-conditioning system allows cold water to enter the heat exchanger shell through the cold source water inlet pipe, and the water tank allows water to enter the buried pipe through the water delivery mechanism, which absorbs heat in the soil, and then water with a certain amount of heat enters the heat exchanger shell through the heat source water inlet pipe. Finally, the heat in the hot water is transferred to the cold water through the heat exchange pipe to achieve the purpose of heat exchange. During the long-term working process of the heat exchange pipe, the outer wall of the heat exchange pipe is cleaned by the descaling mechanism, and the scale on the outer wall of the heat exchange pipe is scraped off to improve the heat exchange efficiency.

[0007] Preferably, the descaling mechanism includes a first reciprocating screw and a motor; the first reciprocating screw is rotatably connected to the inner wall of the heat exchanger shell, and the outside of the first reciprocating screw is provided with a ring body that cooperates with the first reciprocating screw threaded transmission; the ring body surrounds the outside of multiple heat exchange tubes, and the inner wall of the ring body is fixed with multiple descaling sleeves that are respectively sleeved on the outside of the multiple heat exchange tubes; the inner wall of the descaling sleeve is slidably matched with the outer wall of the heat exchange tube; the motor is installed on the outer wall of any one of the two end covers, and the output end of the motor is coaxially fixed to one end of the first reciprocating screw.

[0008] By adopting the above technical solution, when scraping the scale on the outer wall of the heat exchange tube, the start motor drives the first reciprocating screw to rotate, prompting the ring body to drive the descaling sleeve to move along the outer wall of the heat exchange tube. The descaling sleeve scrapes the outer wall of the heat exchange tube during the movement, thereby reducing the possibility of a lot of scale adhering to the outer wall of the heat exchange tube and improving the heat exchange efficiency of the heat exchange tube.

[0009] Preferably, a plurality of cleaning sleeves are rotatably connected to the inner wall of one end of the heat exchanger shell; the plurality of cleaning sleeves are respectively sleeved on the outside of one end of a plurality of heat exchange tubes, bristles are provided on the inner circumferential surface of each cleaning sleeve, and a first gear ring is coaxially fixedly connected to the outer circumferential surface of each cleaning sleeve; a first transmission assembly that can enable the first reciprocating screw to drive the plurality of first gear rings to rotate is also provided inside the heat exchanger shell.

[0010] By adopting the above technical solution, the first reciprocating screw drives the multiple first gear rings and the cleaning brush sleeve to rotate through the first transmission assembly during the rotation process. When the ring body drives the descaling sleeve to move to the inside of 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 scale adhering to the descaling sleeve and ensuring the cleaning effect of the descaling sleeve on the heat exchange tube.

[0011] Preferably, the first transmission assembly includes a second gear ring, a third gear ring and a spur gear; the second gear ring surrounds the outside of the multiple first gear rings, the second gear ring rotates with the inner wall of the end of the heat exchanger shell, the third gear ring is coaxially fixed to the inner wall of the second gear ring, and the third gear ring is meshed with the multiple first gear rings; the spur gear is coaxially fixed to the outer wall of the first reciprocating screw close to the second gear ring, and the spur gear is meshed with the second gear ring.

[0012] By adopting the above technical solution, the first reciprocating screw drives the second and third gear rings to rotate through the meshing cooperation of the spur gear and the second gear ring during rotation. The third gear ring drives multiple brush sleeves to rotate through the meshing cooperation with the first gear ring during rotation, thereby realizing the transmission of kinetic energy during the rotation of the first reciprocating screw.

[0013] Preferably, the water delivery mechanism includes a pump body; the pump body is arranged outside the heat exchanger shell, the pump body input end is fixedly connected to a water inlet pipe connected to the water tank, and the pump body output end is fixedly connected to a water outlet pipe connected to one end of the buried pipe away from the heat source water inlet pipe.

[0014] By adopting the above technical solution, the pump body is started to pump out the water in the water tank and transport it 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 transported to the heat exchanger shell for heat exchange.

[0015] Preferably, a filter is installed on the inner wall of the end of the heat exchange tube close to the heat source water inlet pipe.

[0016] By adopting the above technical solution, the filter can filter the water entering the heat exchange tube, reduce the possibility of scale generation on the inner wall of the heat exchange tube, and ensure the heat exchange efficiency of the heat exchange tube.

[0017] Preferably, the outer wall of the end of the heat exchanger shell close to the filter is rotatably connected to a first rotating shaft; a cleaning brush that can contact the filter is fixedly connected to the outer wall of the first rotating shaft; and a second transmission assembly that can drive the first rotating shaft to rotate is provided at the end of the first reciprocating screw.

[0018] By adopting the above technical solution, the first reciprocating screw drives the first rotating shaft and the cleaning brush to rotate through the second transmission assembly during rotation, prompting the cleaning brush to clean the filter, reducing the possibility of the mesh of the filter being blocked, and ensuring the water permeability of the filter.

[0019] Preferably, the second transmission assembly includes a first sprocket, a second sprocket and a first chain; the first sprocket is coaxially fixed to the outer wall of the end of the first rotating shaft; the second sprocket is coaxially fixed to the outer wall of the end of the first reciprocating screw rod close to the first rotating shaft; the first chain is sleeved on the outside of the first sprocket and the second sprocket, and the first chain links the first sprocket and the second sprocket.

[0020] By adopting the above technical solution, under the cooperation of the first sprocket, the second sprocket and the first chain, the first reciprocating screw will drive the first rotating shaft to rotate during the rotation process, thereby realizing the transmission of kinetic energy during the rotation of the first reciprocating screw.

[0021] Preferably, a second reciprocating screw arranged along the axial direction of the buried pipe is rotatably connected to the inner wall of the buried pipe; a ring plate is sleeved on the outside of the second reciprocating screw and cooperates with the threaded transmission of the second reciprocating screw; the ring plate is slidably matched with the inner wall of the buried pipe; and a power component that can rotate the second reciprocating screw is provided at one end of the second reciprocating screw.

[0022] By adopting the above technical solution, when water flows in the buried pipe, the power assembly can drive the second reciprocating screw to rotate, causing the ring plate to move axially along the second reciprocating screw. During the movement, the ring plate scrapes the inner wall of the buried pipe, thereby reducing the possibility of generating more scale on the inner wall of the buried pipe.

[0023] Preferably, the power assembly includes a protective shell, a second rotating shaft and water wheel blades; the protective shell is fixedly connected 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 axially arranged and rotatably connected to the inner wall of the protective shell along the buried pipe, and the end of the second rotating shaft away from the second reciprocating screw extends outside the protective shell; the water wheel blades are fixedly connected to the outer wall of the second rotating shaft; the end of the second rotating shaft located in the protective shell is coaxially fixed with the third sprocket; the end of the second reciprocating screw located in the protective shell is coaxially fixed with the fourth sprocket; the third sprocket and the fourth sprocket are externally sleeved with the same second chain; the second chain links the third sprocket and the fourth sprocket.

[0024] By adopting the above technical solution, when water in the buried pipe flows through the water wheel blades, the water can be used as a power source to drive the water wheel blades and the second rotating shaft to rotate. With the cooperation of the third sprocket, the fourth sprocket and the second chain, the second rotating shaft drives the second reciprocating screw to rotate. Using flowing water as a power source to drive the second reciprocating screw can reduce energy usage.

[0025] In summary, this application has the following beneficial effects: 1. When it is necessary to clean the scale on the outer wall of the heat exchange tube, the motor is started to drive the first reciprocating screw to rotate, so that the ring body drives multiple descaling sleeves to slide along the outer wall of the heat exchange tube, and the outer wall of the heat exchange tube is scraped to remove the scale on the outer wall of the heat exchange tube, thereby improving the heat exchange efficiency of the heat exchange tube; 2. During the rotation process, the first reciprocating screw will drive the multiple cleaning and brushing sleeves to rotate through the first transmission assembly. When the descaling sleeve is driven to extend into the cleaning and brushing sleeve, the rotating bristles in the cleaning and brushing sleeve will clean the outer periphery of the descaling sleeve, thereby reducing the possibility of scale adhering to the outside of the descaling sleeve and ensuring the descaling sleeve's scraping effect on scale; 3. During the rotation process, the first reciprocating screw will drive the first rotating shaft to rotate through the second transmission assembly, prompting the cleaning brush to clean the filter screen arranged on the inner wall of the end of the heat exchange tube, thereby reducing the possibility of the filter screen being blocked by impurities and ensuring the water permeability of the filter screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a high-efficiency heat transfer device for a heat exchanger used in a geothermal heat pump; Figure 2 It is a schematic diagram of the internal structure of the heat exchanger shell in this application; Figure 3It is a schematic diagram of the internal structure of the buried pipe in this application; Figure 4 It is a schematic diagram of the matching structure of the second reciprocating screw and the power assembly in this application; Figure 5 It is a structural schematic diagram of the descaling mechanism in this application; Figure 6 It is a schematic diagram of the matching structure of the first transmission assembly and multiple cleaning brush sleeves in the present application; Figure 7 It is a schematic diagram of the matching structure of the heat exchanger shell, heat exchange tube and cleaning brush in this application; Figure 8 It is a schematic diagram of the transmission matching structure of the first reciprocating screw and the first rotating shaft in the present application.

[0027] Description of the accompanying drawings: 1. heat exchanger housing; 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. brush sleeve; 161. bristles; 17. first gear ring; 18. first rotating shaft; 181. cleaning brush; 2. water tank; 3. buried pipe; 31. second reciprocating screw 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 tube; 41. filter; 5. water delivery mechanism; 51. pump body; 52. water inlet pipe; 53. water outlet pipe; 6. descaling mechanism; 61. first reciprocating screw; 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

[0028] The present invention will be further described in detail below with reference to the accompanying drawings. The same components are denoted 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 accompanying drawings, and the terms "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0029] The present invention discloses a high-efficiency heat transfer device for a heat exchanger used in a geothermal heat pump. Figure 1 and Figure 2 As shown, the heat exchanger comprises a heat exchanger shell 1, a water tank 2, an underground pipe 3 and a water delivery mechanism 5. End caps 11 are detachably mounted on both ends of the heat exchanger shell 1. A plurality of heat exchange tubes 4 are arranged axially along the heat exchanger shell 1 and connected to the end caps 11. The plurality of heat exchange tubes 4 are arranged circumferentially along the outer periphery of the axis of the heat exchanger shell 1. A cold source water inlet pipe 12 and a cold source water outlet pipe 13 are arranged on the outer wall of the heat exchanger shell 1, the water tank 2 is arranged outside one end of the heat exchanger shell 1, and a heat source water outlet pipe 15 connected to the end cover 11 at one end of the heat exchanger shell 1 is arranged on the side wall of the water tank 2. The buried pipe 3 is buried in the soil, and a heat source water inlet pipe 14 is arranged at the water outlet end of the buried pipe 3. The heat source water inlet pipe 14 and the end cover 11 at one end of the heat exchanger shell 1 away from the heat source water outlet pipe 15. The water delivery mechanism 5 is arranged on one side of the water tank 2, and the water delivery mechanism 5 can input the water inside the water tank 2 into the buried pipe 3 from the water inlet end of the buried pipe 3.

[0030] The external air conditioning system delivers cold water into the heat exchanger shell 1 through the cold source water inlet pipe 12, and the water tank 2 delivers water into the buried pipe 3 through the water delivery mechanism 5. The buried pipe 3 absorbs heat in the soil, and then water with a certain amount of heat is delivered into the heat exchanger shell 1 through the heat source water 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.

[0031] like Figure 1 and Figure 2 As shown, the water delivery mechanism 5 includes a pump body 51, a water inlet pipe 52 and a water outlet pipe 53. The pump body 51 is arranged on the outside of the water tank 2. One end of the water inlet pipe 52 is fixedly connected to the input end of the pump body 51, and the other end of the water inlet pipe 52 is fixedly connected to the side wall of the water tank 2 and communicates with the water tank 2. One end of the water outlet pipe 53 is fixedly connected to the output end of the pump body 51, and the other end of the water outlet pipe 53 can be detachably installed on the outer wall of the water inlet end of the buried pipe 3 and communicates with the buried pipe 3.

[0032] Starting the pump body 51 can pump out the water in the water tank 2 and transport it to the buried pipe 3 through the water inlet pipe 52 and the water outlet pipe 53 to absorb the heat in the soil, so that the water with a certain amount of heat can be transported to the heat exchanger shell 1 for heat exchange.

[0033] like Figure 1 and Figure 3 As shown, a second reciprocating screw 31 arranged along the axial direction of the buried pipe 3 is rotatably connected to the inner wall of the buried pipe 3, and a ring plate 32 that slides with the inner wall of the buried pipe 3 is sleeved on the outside of the second reciprocating screw 31, and the ring plate 32 is threadedly matched with the second reciprocating screw 31. A power component 33 that can drive the second reciprocating screw 31 to rotate is provided on the side of the second reciprocating screw 31 close to the water inlet end of the buried pipe 3.

[0034] The power assembly 33 in the buried pipe 3 can drive the second reciprocating screw 31 to rotate, causing the ring plate 32 to move axially along the second reciprocating screw 31 to 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.

[0035] like Figure 3 and Figure 4As shown, the power assembly 33 includes a protective shell 331, a second rotating shaft 332, a water wheel blade 333, a third sprocket 334, a fourth sprocket 335 and a second chain 336. The protective shell 331 is fixed to the inner wall of the top end of the buried pipe 3, and the second rotating shaft 332 is 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 is away from the second reciprocating screw rod 31 and extends to the outside of the protective shell 331. The water wheel blade 333 is fixed to the end of the second rotating shaft 332 extending outside the protective shell 331. The third sprocket 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 into the protective shell 331 and rotates with the inner wall of the protective shell 331, the fourth sprocket 335 is coaxially fixedly connected to the outer wall of the end of the second reciprocating screw rod 31 extending into the protective shell 331, and the third sprocket 334 and the fourth sprocket 335 are linked when the second chain 336 is sleeved on the outside of the third sprocket 334 and the fourth sprocket 335.

[0036] When water in the buried pipe 3 flows through the water wheel blades 333, the water can be used as a power source to drive the second rotating shaft 332 and the water wheel blades 333 to rotate. With the cooperation of the third sprocket 334, the fourth sprocket 335 and the second chain 336, the second rotating shaft 332 will drive the second reciprocating screw 31 to rotate, thereby realizing the use of flowing water as a power source to drive the second reciprocating screw 31 to rotate, thereby reducing energy usage.

[0037] like Figure 2 and Figure 5 As shown, a descaling mechanism 6 for cleaning the scale on the outer wall of the heat exchange tube 4 is arranged inside the heat exchanger shell 1. The descaling mechanism 6 includes a motor 62, a first reciprocating screw 61 and a ring body 63. The motor 62 is installed on the outer wall of the end cover 11 connected to the heat source water outlet pipe 15. The first reciprocating screw 61 is coaxially fixed to the output end of the motor 62. The first reciprocating screw 61 extends horizontally along the axial direction of the heat exchanger shell 1 to the inside of the heat exchanger shell 1. The ring body 63 is sleeved on the outside of the first reciprocating screw 61. The ring body 63 and the first reciprocating screw 61 are threadedly matched. The ring body 63 surrounds the outside of multiple heat exchange tubes 4. Multiple descaling sleeves 64 are fixed on the inner wall of the ring body 63. The multiple descaling sleeves 64 are arranged in a circle outside the axis of the ring body 63 and are respectively sleeved on the outside of multiple heat exchange tubes 4. The descaling sleeves 64 slide with the outer wall of the heat exchange tube 4.

[0038] When the starting motor 62 drives the first reciprocating screw 61 to rotate, the ring body 63 can drive the descaling sleeve 64 to move along the outer wall of the heat exchange tube 4 to scrape the outer wall of the heat exchange tube 4, thereby reducing the possibility of more scale adhering to the outer wall of the heat exchange tube 4 and improving the heat exchange efficiency of the heat exchange tube 4.

[0039] like Figure 2 and Figure 6As shown, a plurality of cleaning sleeves 16 respectively sleeved on the outside of one end of the heat exchange tube 4 are rotatably connected to the inner walls at both ends of the heat exchanger shell 1, and bristles 161 are arranged on the inner circumference of each cleaning sleeve 16, and a first gear ring 17 is coaxially fixedly connected to the outer circumference of each cleaning sleeve 16. A pair of first transmission components 65 are also arranged inside the heat exchanger shell 1, and the pair of first transmission components 65 can make the first reciprocating screw 61 drive the plurality of first gear rings 17 located on the outer wall of the cleaning sleeve 16 to rotate.

[0040] During the rotation process, the first reciprocating screw 61 will drive multiple cleaning sleeves 16 to rotate through the first transmission assembly 65. When the ring body 63 drives the descaling sleeve 64 to move to the inside of the cleaning sleeve 16, the bristles 161 rotating in the cleaning sleeve 16 clean the outer surface of the descaling sleeve 64, reducing the possibility of scale adhering to the descaling sleeve 64, thereby ensuring the cleaning effect of the descaling sleeve 64.

[0041] like Figure 2 and Figure 6 As shown, 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 is rotatably connected to the inner wall of one end of the heat exchanger shell 1, and the second gear ring 651 surrounds the outside of multiple cleaning sleeves 16. The third gear ring 652 is coaxially fixed to the inner wall of the second gear ring 651. The third gear ring 652 is meshed with multiple first gear rings 17. The spur gear 653 is coaxially fixed to the outer wall of the end of the first reciprocating screw 61 close to the second gear ring 651 and meshes with the second gear ring 651.

[0042] The first reciprocating screw rod 61 will drive the spur gear 653 to rotate during its rotation. Under the meshing cooperation between the spur gear 653 and the second gear ring 651, the second gear ring 651 and the third gear ring 652 will rotate synchronously. Then, through the meshing cooperation between the third gear ring 652 and the first gear ring 17, the third gear ring 652 will drive the multiple cleaning sleeves 16 located on the same side thereof to rotate.

[0043] like Figure 2 , Figure 7 and Figure 8 As shown, a filter screen 41 is installed on the inner wall of the end of each heat exchange tube 4 close to the heat source water inlet pipe 14, and a first rotating shaft 18 is coaxially rotatably connected to the outer wall of the end of the heat exchanger housing 1 close to the filter screen 41. A cleaning brush 181 that can contact the filter screen 41 is fixedly connected to the outer wall of the first rotating shaft 18, and a second transmission assembly 66 is provided at the end of the first reciprocating screw 61 close to the first rotating shaft 18. The second transmission assembly 66 can enable the first reciprocating screw 61 to drive the first rotating shaft 18 to rotate.

[0044] The setting of the filter 41 can filter the recycled water and reduce the possibility of impurities entering the heat exchange tube 4. During the rotation process, the first reciprocating screw 61 can drive the first rotating shaft 18 to rotate through the first transmission assembly 65, prompting the cleaning brush 181 to clean the filter 41 and reduce the possibility of the mesh of the filter 41 being blocked.

[0045] like Figure 7 and Figure 8 As shown, 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 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. The first chain 663 links the first sprocket 661 and the second sprocket 662.

[0046] During the rotation process, the first reciprocating screw rod 61 can drive the first rotating shaft 18 to rotate through the cooperation of the first sprocket wheel 661 , the second sprocket wheel 662 and the first chain 663 , thereby conveniently realizing the transmission of kinetic energy during the rotation process of the first reciprocating screw rod 61 .

[0047] Working principle: the external air conditioning system delivers cold water to the heat exchanger housing 1 through the cold source water inlet pipe 12, and the water in the water tank 2 is delivered to the buried pipe 3 through the pump body 51. When the water flows in the buried pipe 3, it absorbs the heat in the soil and has a certain amount of heat. Then, the water with a certain amount of heat enters the heat exchange pipe 4 in the heat exchanger housing 1 through the heat source 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. When it is necessary to clean the scale on the outer wall of the heat exchange tube 4, the motor 62 is started to drive the first reciprocating screw 61 to rotate, so that the ring body 63 drives the multiple descaling sleeves 64 to slide along the outer wall of the heat exchange tube 4, and the outer wall of the heat exchange tube 4 is scraped to remove the scale on the outer wall of the heat exchange tube 4, thereby improving the heat exchange efficiency of the heat exchange tube 4; During the rotation process, the first reciprocating screw 61 drives the cleaning sleeve 16 located outside the heat exchange tube 4 to rotate through the first transmission assembly 65. When the ring body 63 drives the descaling sleeve 64 to move toward the cleaning sleeve 16 and gradually extends into the cleaning sleeve 16, the bristles 161 arranged in the cleaning sleeve 16 will clean the outer periphery of the descaling sleeve 64, thereby reducing the possibility of scale scraped by the descaling sleeve 64 adhering to its surface, thereby ensuring the descaling effect of the descaling sleeve 64. During the rotation process, the first reciprocating screw 61 will drive the first rotating shaft 18 and the cleaning brush 181 to rotate through the second transmission assembly 66, prompting the cleaning brush 181 to clean the filter screen 41 arranged on the inner wall of the end of the heat exchange tube 4, thereby reducing the possibility of the filter screen 41 being blocked by impurities and ensuring the water permeability of the filter screen 41.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump, characterized in that: The invention comprises a heat exchanger shell (1), a water tank (2) and a buried pipe (3); end caps (11) are installed on the outside of both ends of the heat exchanger shell (1); a heat exchange pipe (4) is arranged inside the heat exchanger shell (1); the heat exchange pipe (4) is connected to the inside of the two end caps (11); a cold source water inlet pipe (12) and a cold source water outlet pipe (13) are arranged on the outer wall of the heat exchanger shell (1); the water tank (2) is arranged on the outside of one side of the heat exchanger shell (1); the buried pipe (3) is buried in the soil; the end cap at one end of the heat exchanger shell (1) A heat source water inlet pipe (14) connected to one end of the buried pipe (3) is arranged on the outer wall of the heat exchanger shell (1); a heat source water outlet pipe (15) connected to the water tank (2) is arranged on the outer wall of the end cover (11) at the end away from the heat source water inlet pipe (14) of the heat exchanger shell (1); a water supply mechanism (5) capable of connecting the water tank (2) and the end of the buried pipe (3) away from the heat source water inlet pipe (14) is also arranged on the outside of the heat exchanger shell (1); and a descaling mechanism (6) capable of cleaning the outer walls of a plurality of heat exchange tubes (4) is arranged inside the heat exchanger shell (1).

2. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 1, characterized in that: The descaling mechanism (6) comprises 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 housing (1), and the first reciprocating screw (61) is externally sleeved with a ring body (63) that is threadedly matched with the first reciprocating screw (61); the ring body (63) surrounds the outside of a plurality of heat exchange tubes (4), and the inner wall of the ring body (63) is fixedly connected with a plurality of descaling sleeves (64) that are respectively sleeved on the outside of the plurality of heat exchange tubes (4); the inner wall of the descaling sleeve (64) is slidably matched with the outer wall of the heat exchange tube (4); the motor (62) is mounted on the outer wall of any one of the two end covers (11), and the output end of the motor (62) is coaxially fixedly connected with one end of the first reciprocating screw (61).

3. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 2, characterized in that: A plurality of cleaning sleeves (16) are rotatably connected to the inner wall of one end of the heat exchanger shell (1); the plurality of cleaning sleeves (16) are respectively sleeved on the outside of one end of a plurality of heat exchange tubes (4); bristles (161) are provided on the inner circumference of each cleaning sleeve (16); and a first gear ring (17) is coaxially fixedly connected to the outer circumference of each cleaning sleeve (16); and a first transmission assembly (65) is also provided inside the heat exchanger shell (1) to enable the first reciprocating screw (61) to drive the plurality of first gear rings (17) to rotate.

4. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 3, characterized in that: The first transmission assembly (65) comprises a second gear ring (651), a third gear ring (652) and a spur gear (653); the second gear ring (651) surrounds the outside of the plurality of first gear rings (17); the second gear ring (651) is rotatably matched with the inner wall of the end of the heat exchanger shell (1); the third gear ring (652) is coaxially fixed to the inner wall of the second gear ring (651); the third gear ring (652) is meshed with the plurality of first gear rings (17); the spur gear (653) is coaxially fixed to the outer wall of the first reciprocating screw (61) close to the second gear ring (651); the spur gear (653) is meshed with the second gear ring (651).

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

6. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 2, characterized in that: A filter screen (41) is installed on the inner wall of the end of the heat exchange tube (4) close to the heat source water inlet pipe (14).

7. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 6, characterized in that: The outer wall of the end of the heat exchanger housing (1) close to the filter (41) is rotatably connected to a first rotating shaft (18); a cleaning brush (181) capable of contacting the filter (41) is fixedly connected to the outer wall of the first rotating shaft (18); and a second transmission assembly (66) capable of driving the first rotating shaft (18) to rotate is provided at the end of the first reciprocating screw (61).

8. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 7, characterized in that: The second transmission assembly (66) comprises 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 rod (61) close to the first rotating shaft (18); the first chain (663) is sleeved on the outside of the first sprocket (661) and the second sprocket (662), and the first chain (663) enables the first sprocket (661) and the second sprocket (662) to move in linkage.

9. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 1, characterized in that: A second reciprocating screw (31) arranged axially along the buried pipe (3) is rotatably connected to the inner wall of the buried pipe (3); a ring plate (32) threadedly matched with the second reciprocating screw (31) is sleeved on the outside of the second reciprocating screw (31); the ring plate (32) is slidably matched with the inner wall of the buried pipe (3); and a power assembly (33) capable of rotating the second reciprocating screw (31) is provided at one end of the second reciprocating screw (31).

10. The high-efficiency heat transfer device for a heat exchanger for a geothermal heat pump according to claim 9, characterized in that: The power assembly (33) comprises a protective shell (331), a second rotating shaft (332) and a water wheel blade (333); the protective shell (331) is fixedly connected to the inner wall of the buried pipe (3); one end of the second reciprocating screw rod (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 rod (31) extends outside the protective shell (331); the water wheel blade (33 3) is fixedly connected to the outer wall of the second rotating shaft (332); the end of the second rotating shaft (332) located in the protective shell (331) is coaxially fixedly connected to the third sprocket (334); the end of the second reciprocating screw rod (31) located in the protective shell (331) is coaxially fixedly connected to the fourth sprocket (335); the third sprocket (334) and the fourth sprocket (335) are externally sleeved with the same second chain (336); the second chain (336) enables the third sprocket (334) and the fourth sprocket (335) to be linked.

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