A condensing heat pump

Abstract

The present invention relates to the technical field of heat exchange devices, and specifically to a condensing heat pump, comprising a heat exchanger; the heat exchanger comprises a shell, a heat transfer tube, a tube sheet, a baffle, a partition plate and a No. 1 cavity; the motor is fixedly connected to the tube sheet, and the output end of the motor passes through the tube sheet and is fixedly connected with a worm; the other end of the worm passes through the baffle and is rotatably connected to another tube sheet, and the worm and the baffle are threadedly connected; the present invention drives the baffle to clean the scale on the surface of the heat transfer tube and the inner wall of the shell by the worm, and then the scale is suspended in water after being cleaned and discharged from the No. 4 interface along the water flow, thereby achieving the purpose of cleaning the scale in the heat exchanger, preventing the scale from adhering to the heat transfer tube and the inner wall of the shell, and ensuring the heat transfer efficiency of the heat exchanger; at the same time, preventing the accumulation of scale and clogging the heat exchanger, ensuring the use effect of the heat exchanger, and then ensuring the use effect of the condensing heat pump.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange devices, in particular to a condensing heat pump. Background Art

[0002] Condensing heat pump is an innovative heat pump technology that uses air source heat pump to realize the function of water source heat pump. The heat pump uses condensing tower to absorb heat from low-temperature air to produce heat source that can be used by water source heat pump, so as to realize low-temperature heat extraction. Compared with traditional heat pump, condensing heat pump has the characteristics of wide application range and low operating cost. Condensing heat pump is composed of compressor, heat exchanger, evaporator and controller. The heating temperature of condensing heat pump used in general factories can reach above 90 degrees Celsius, while water is easy to generate scale when it exceeds 75 degrees Celsius. Scale will be generated and accumulated in the heat exchanger of condensing heat pump, which will affect the heat exchange efficiency of the heat exchanger. When the scale accumulates too much, it will cause the heat exchanger to be blocked, and then the condensing heat pump will stop working.

[0003] For example, a Chinese patent with application number CN202021165924.4 discloses an anti-scaling air source heat pump heat exchanger, including a heat exchanger body, which is a cylindrical structure, including an outer shell, an inner shell, and a spiral coil arranged between the inner shell and the outer shell, and a hot water exchange channel is provided in the spiral coil; the spiral coil includes a water inlet and a water outlet, both of which extend to the outside of the outer shell, and the water inlet is located below the water outlet; the inner wall of the spiral coil is provided with an anti-scaling coating; the heat exchanger includes a spiral coil, a spiral coil, and a heat exchanger body. The inner wall of the spiral tube is corrugated, which can increase the heat exchange area compared with the bare tube, and help the refrigerant to produce turbulent motion when in liquid state, thereby obtaining efficient heat transfer; at the same time, the inner wall is coated with a coating, which is tightly combined with the inner wall of the spiral coil and has high wear resistance and corrosion resistance; however, the spiral coil of this technical solution needs to be coated with four different layers of coating on the inner wall of the spiral coil during production, and the manufacturing process is cumbersome, and the four layers of coating need to be applied to the inner wall of the spiral coil, and the thickness of the coating cannot be guaranteed, resulting in high manufacturing costs, which in turn causes limitations to this solution.

[0004] In view of this, in order to overcome the above technical problems, the present invention proposes a condensing heat pump to solve the above technical problems. Summary of the invention

[0005] In order to make up for the shortcomings of the prior art, the present invention proposes a condensing heat pump, which uses a worm to drive a baffle to clean the scale on the surface of the heat transfer tube and the inner wall of the shell, and then the scale is suspended in water after being cleaned and discharged from the fourth interface along the water flow, thereby achieving the purpose of cleaning the scale in the heat exchanger, thereby preventing the scale from adhering to the heat transfer tube and the inner wall of the shell, and ensuring the heat transfer efficiency of the heat exchanger; at the same time, it prevents the accumulation of scale and the clogging of the heat exchanger, thereby ensuring the heat exchange efficiency and use effect of the heat exchanger, thereby improving the use effect of the condensing heat pump.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a condensing heat pump described in the present invention includes a compressor, a heat exchanger, an evaporator and a controller, etc.; the heat exchanger includes a shell, a heat transfer tube, a tube sheet, a baffle and a No. 1 cavity; the shell is fixedly connected with a No. 1 interface, a No. 2 interface, a No. 3 interface and a No. 4 interface; the number of the tube sheets is two, and the two tube sheets are respectively located at the two ends of the shell; a motor is arranged in the No. 1 cavity; the motor is fixedly connected to the tube sheet, the output end of the motor passes through the tube sheet, and a worm is fixedly connected to the output end of the motor; the other end of the worm passes through the baffle and is rotatably connected to another tube sheet, and the worm and the baffle are threadedly connected; the baffle is slidably connected to the heat transfer tube and the shell; a protective shell is arranged in the No. 1 cavity; the protective shell is fixedly connected to the tube sheet, and the protective shell wraps the motor;

[0007] When working, the heating temperature of the condensing heat pump used in general factories can reach above 90 degrees Celsius, and water is prone to scale formation when it exceeds 75 degrees Celsius; scale will be generated and accumulated in the heat exchanger of the condensing heat pump, affecting the heat exchange efficiency of the heat exchanger. When the scale accumulates too much, the heat exchanger will be blocked, and then the condensing heat pump will stop working;

[0008] Therefore, when the condensing heat pump is working, the low-temperature refrigerant in the compressor continuously absorbs low-grade heat energy from the outdoor air, brings it back to the compressor to upgrade it into usable high-grade heat energy and heat the water in the condensing heat pump. After being heated, the water in the condensing heat pump flows into the heat exchanger through the No. 1 interface, and then flows into the heat transfer tube under the partition plate; when the factory uses the condensing heat pump, the water to be heated is passed into the heat exchanger from the No. 3 interface, and flows into the space between the tube sheet and the baffle. At this time, the heat transfer tube can transfer the heat of the hot water in the heat transfer tube to the water outside the heat transfer tube; the water that flows into the heat exchanger through the No. 3 interface flows into the space between the baffle and the inner wall of the shell, and then flows into the space between the baffle and the adjacent baffle through the heat transfer tube for heating again, until the water flows out from the No. 4 interface; The water flows into the No. 1 cavity, and then passes through the heat transfer tube above the partition plate from the No. 1 cavity to heat the water flowing into the No. 3 interface again, and finally flows out of the heat exchanger from the No. 2 interface to be heated again, and the cycle repeats like this; when the water is heated to above 75 degrees Celsius, scale will be generated in the water and adhere to the surface of the heat transfer tube and the inner wall of the shell. At this time, the controller regularly controls the motor to drive the worm to rotate, so that the worm drives the baffle to slide in the shell, and the baffle cleans the scale on the surface of the heat transfer tube and the inner wall of the shell. After the scale is cleaned, it is suspended in the water and discharged from the No. 4 interface along the water flow. The controller controls the motor to rotate in the opposite direction, so that the worm drives the baffle to slide in the opposite direction until the baffle returns to its original position, completing the scale cleaning process;

[0009] The present invention uses a worm to drive a baffle to clean the scale on the surface of the heat transfer tube and the inner wall of the shell, and then the cleaned scale is suspended in water and discharged from the fourth interface along the water flow, thereby achieving the purpose of cleaning the scale in the heat exchanger, thereby preventing the scale from adhering to the heat transfer tube and the inner wall of the shell, and ensuring the heat transfer efficiency of the heat exchanger; at the same time, it prevents the accumulation of scale and the clogging of the heat exchanger, thereby ensuring the use effect of the heat exchanger, and further ensuring the use effect of the condensing heat pump.

[0010] Preferably, a rotating sleeve is sleeved on the worm; the number of the rotating sleeves is the same as the number of the baffles, the position of the rotating sleeve corresponds to the baffle, the rotating sleeve is located on the side of the baffle close to the first interface, and the rotating sleeve is fixedly connected to the corresponding baffle; blades are fixedly connected to the outer side of the rotating sleeve; the blades are inclined;

[0011] During operation, water that needs to be heated in the factory flows in from the No. 3 interface. When the water flows around the blades, it will be blocked by the blades and change the direction of the water flow, so that it rotates in the shell, increasing the contact between the water flow and the heat transfer tube; when the baffle moves in the heat exchanger, the baffle moves with the rotating sleeve and the blades, and the scale is cleaned and suspended in the water, and then stirred by the water flow changed by the blades, preventing the scale from settling in the water and then reattaching to the heat transfer tube or the inner wall of the shell;

[0012] The present invention achieves the purpose of stirring the water flow in the shell by setting the blades tilted and cooperating with the blades to change the direction of the water flow, thereby increasing the contact degree between the water flow and the heat transfer tube, thereby improving the heat exchange efficiency of the heat exchanger, and at the same time preventing the scale from precipitating in the water when cleaning the scale, thereby ensuring the scale cleaning effect of the present invention and improving the performance of the present invention.

[0013] Preferably, a cleaning groove is provided on the inner side wall of the rotating sleeve; the cleaning groove penetrates the rotating sleeve in the axial direction of the worm, and a cleaning block is provided in the rotating sleeve; the cleaning block is made of a flexible material;

[0014] During operation, the worm drives the baffle to move, so that the worm rotates relative to the inner wall of the rotating sleeve, and then the cleaning block can brush the surface of the worm, so that the cleaning block can clean the scale on the surface of the worm; when the baffle moves with the rotating sleeve, the cleaning block also moves with the baffle, and then all the cleaning blocks on the rotating sleeve can clean the surface of the entire worm, preventing the scale on the surface of the worm from affecting the transmission between the worm and the baffle, thereby affecting the movement of the baffle;

[0015] The present invention achieves the purpose of cleaning the scale on the surface of the worm by rotating the worm relative to the inner wall of the rotating sleeve and cooperating with the cleaning block to brush the surface of the worm, thereby preventing the scale on the surface of the worm from affecting the transmission between the worm and the baffle plate, thereby affecting the movement of the baffle plate, ensuring the stability of the movement of the baffle plate driven by the worm, and further ensuring the actual use effect of the present invention.

[0016] Preferably, the cleaning blocks are arranged in sequence, and adjacent cleaning blocks can slide against each other. A telescopic spring is fixedly connected to the end surface of the cleaning block away from the worm; the other end of the telescopic spring is fixedly connected to the end surface of the cleaning groove away from the worm;

[0017] During operation, the telescopic spring is in a compressed state, and the worm rotates relative to the rotating sleeve, so that the cleaning block cleans the surface of the worm; when the worm rotates to the point where the thread on the worm is below the cleaning block, the telescopic spring pushes the cleaning block into the thread of the worm, so that the cleaning block cleans the thread on the worm, and as the worm continues to rotate, the thread squeezes the cleaning block, so that the cleaning block slides out of the thread, and the telescopic spring returns to a compressed state; then the thread on the worm is cleaned, which increases the cleaning effect of the cleaning block, thereby ensuring the smoothness of the movement of the baffle plate, and further enhancing the actual use effect of the present invention.

[0018] Preferably, both side walls of the baffle are fixedly connected with a No. 2 annular block and a No. 3 annular block; the cross-section of the No. 2 annular block is triangular in shape, the angle of the cross-section of the No. 2 annular block away from the corresponding end of the baffle becomes smaller, and the outer wall of the No. 2 annular block fits the inner wall of the shell; the No. 3 annular block is sleeved on the heat transfer tube, the cross-section of the No. 3 annular block is triangular in shape, the angle of the cross-section of the No. 3 annular block away from the corresponding end of the baffle becomes smaller, and the inner wall of the No. 3 annular block fits the heat transfer tube;

[0019] During operation, the baffle moves with the No. 2 annular block and the No. 3 annular block, the No. 2 annular block scrapes off the scale on the inner wall of the shell, and the No. 3 annular block scrapes off the scale on the surface of the heat transfer tube; the ends of the cross-sections of the No. 2 annular blocks and the No. 3 annular blocks away from the baffle are pointed, making it easier to scrape off the scale, thereby increasing the cleaning effect of the present invention, ensuring the cleanliness of the heat transfer tube and the inner wall of the shell, and improving the heat exchange effect of the heat exchanger, thereby enhancing the use effect of the condensing heat pump.

[0020] Preferably, the inner diameter of the No. 3 interface and the No. 4 interface is greater than the thickness of the baffle plate plus the two No. 2 annular blocks;

[0021] During operation, the baffle moves with the No. 2 annular block. When the baffle closest to the No. 1 interface moves to the top of the moving distance, the baffle and the No. 2 annular block cannot block the No. 3 interface. When the baffle farthest from the No. 1 interface moves to the top of the moving distance, the baffle and the No. 2 annular block cannot block the No. 4 interface. This prevents the baffle and the No. 2 annular block from blocking the No. 3 and No. 4 interfaces when the baffle and the No. 2 annular block are cleaning scale. This ensures that the No. 3 and No. 4 interfaces are always connected to the inside of the shell, so that water always flows in and out of the heat exchanger, thereby ensuring the actual use effect of the present invention.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention uses a worm to drive the baffle to clean the scale on the surface of the heat transfer tube and the inner wall of the shell, and then the scale is suspended in water after being cleaned and discharged from the fourth interface along the water flow, thereby achieving the purpose of cleaning the scale in the heat exchanger, thereby preventing the scale from adhering to the heat transfer tube and the inner wall of the shell, ensuring the heat transfer efficiency of the heat exchanger; at the same time, it prevents the accumulation of scale and the blockage of the heat exchanger, ensuring the use effect of the heat exchanger, and then ensuring the use effect of the condensing heat pump.

[0024] 2. The present invention achieves the purpose of stirring the water flow in the shell by setting the blades at an angle, and then cooperates with the blades to change the direction of the water flow, thereby increasing the contact degree between the water flow and the heat transfer tube, thereby improving the heat exchange efficiency of the heat exchanger, and at the same time, when cleaning scale, the scale will not precipitate in the water, thereby ensuring the scale cleaning effect of the present invention and improving the performance of the present invention.

[0025] 3. The present invention achieves the purpose of cleaning the scale on the surface of the worm by rotating the worm relative to the inner wall of the rotating sleeve and cooperating with the cleaning block to brush the surface of the worm, preventing the scale on the surface of the worm from affecting the transmission between the worm and the baffle plate, thereby affecting the movement of the baffle plate, thereby ensuring the stability of the movement of the baffle plate driven by the worm, and further ensuring the actual use effect of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] Figure 1 is a stereogram of the present invention;

[0028] Figure 2 is a cross-sectional view of a heat exchanger of the present invention;

[0029] Figure 3 It is a schematic diagram of the structure of the worm, baffle, rotating sleeve, etc. in the present invention;

[0030] Figure 4 It is a cross-sectional view of the worm, baffle and rotating sleeve in the present invention;

[0031] Figure 5 yes Figure 4 The enlarged view of point A in the middle;

[0032] In the figure: 1. compressor; 2. heat exchanger; 3. evaporator; 21. shell; 22. heat transfer tube; 23. tube sheet; 24. baffle; 25. cavity No. 1; 211. interface No. 1; 212. interface No. 2; 213. interface No. 3; 214. interface No. 4; 251. motor; 4. worm; 5. rotating sleeve; 53. blade; 54. cleaning groove; 55. cleaning block; 56. telescopic spring; 7. annular block No. 2; 8. annular block No. 3. DETAILED DESCRIPTION

[0033] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0034] like Figures 1 to 5As shown, a condensing heat pump described in the present invention includes a compressor 1, a heat exchanger 2, an evaporator 3 and a controller, etc.; the heat exchanger 2 includes a shell 21, a heat transfer tube 22, a tube sheet 23, a baffle 24 and a No. 1 cavity 25; the shell 21 is fixedly connected with a No. 1 interface 211, a No. 2 interface 212, a No. 3 interface 213 and a No. 4 interface 214; the number of the tube sheets 23 is two, and the two tube sheets 23 are respectively located at the two ends of the shell 21; the No. 1 cavity 25 is provided with a motor 251; the motor 251 is fixedly connected to the tube sheet 23, the output end of the motor 251 passes through the tube sheet 23, and the output end of the motor 251 is fixedly connected to a worm 4; the other end of the worm 4 passes through the baffle 24 and is rotatably connected to another tube sheet 23, and the worm 4 and the baffle 24 are threadedly connected; the baffle 24 and the heat transfer tube 22 and the shell 21 are slidably connected; a protective shell is provided in the first cavity 25; the protective shell is fixedly connected to the tube sheet 23, and the protective shell wraps the motor 251;

[0035] When working, the heating temperature of the condensing heat pump used in general factories can reach above 90 degrees Celsius, and water is prone to scale formation when the temperature exceeds 75 degrees Celsius; scale will be generated and accumulated in the heat exchanger 2 of the condensing heat pump, affecting the heat exchange efficiency of the heat exchanger 2. When the scale accumulates too much, the heat exchanger 2 will be blocked, and then the condensing heat pump will stop working;

[0036] Therefore, when the condensing heat pump is working, the low-temperature refrigerant in the compressor 1 continuously absorbs low-grade heat energy in the outdoor air, brings it back to the compressor 1 to upgrade it into usable high-grade heat energy and heat the water in the condensing heat pump. After being heated, the water in the condensing heat pump flows into the heat exchanger 2 through the No. 1 interface 211, and then flows into the heat transfer tube 22 under the partition plate; when the factory uses the condensing heat pump, the water to be heated is passed into the heat exchanger 2 from the No. 3 interface 213, and flows into the space between the tube sheet 23 and the baffle 24. At this time, the heat transfer tube 22 can transfer the heat of the hot water in the heat transfer tube 22 to the water outside the heat transfer tube 22; the water that flows into the heat exchanger 2 through the No. 3 interface 213 flows into the space between the baffle 24 and the inner wall of the shell 21, and is heated again by the heat transfer tube 22 until the water flows out from the No. 4 interface 214; Water flows into the No. 1 cavity 25, and then passes through the heat transfer tube 22 above the partition plate from the No. 1 cavity 25 to heat the water flowing into the No. 3 interface 213 again, and finally flows out of the heat exchanger 2 from the No. 2 interface 212 to be heated again, and the cycle repeats in this way; when the water is heated to above 75 degrees Celsius, scale will be generated in the water and adhere to the surface of the heat transfer tube 22 and the inner wall of the shell 21. At this time, the controller regularly controls the motor 251 to rotate with the worm 4, so that the worm 4 drives the baffle 24 to slide in the shell 21, and the baffle 24 cleans the scale on the surface of the heat transfer tube 22 and the inner wall of the shell 21. After the scale is cleaned, it is suspended in the water and discharged from the No. 4 interface 214 along the water flow. The controller controls the motor 251 to rotate in the opposite direction, so that the worm 4 drives the baffle 24 to slide in the opposite direction until the baffle 24 returns to its original position, completing the scale cleaning process;

[0037] The present invention drives the baffle plate 24 to clean the scale on the surface of the heat transfer tube 22 and the inner wall of the shell 21 through the worm 4, and then the scale is suspended in the water after being cleaned and discharged from the fourth interface 214 along the water flow, thereby achieving the purpose of cleaning the scale in the heat exchanger 2, thereby preventing the scale from adhering to the heat transfer tube 22 and the inner wall of the shell 21, and ensuring the heat transfer efficiency of the heat exchanger 2; at the same time, it prevents the accumulation of scale and the blockage of the heat exchanger 2, thereby ensuring the use effect of the heat exchanger 2, and then ensuring the use effect of the condensing heat pump.

[0038] As an embodiment of the present invention, a rotating sleeve 5 is sleeved on the worm 4; the number of the rotating sleeves 5 is the same as the number of the baffles 24, the position of the rotating sleeve 5 corresponds to the baffle 24, the rotating sleeve 5 is located on the side of the baffle 24 close to the first interface 211, and the rotating sleeve 5 is fixedly connected to the corresponding baffle 24; the outer side of the rotating sleeve 5 is fixedly connected with a blade 53; the blade 53 is arranged obliquely;

[0039] During operation, water to be heated in the factory flows in from the No. 3 interface 213. When the water flows around the blades 53, it is blocked by the blades 53 and changes the direction of the water flow, thereby rotating in the shell 21, increasing the contact between the water flow and the heat transfer tube 22. When the baffle 24 moves in the heat exchanger 2, the baffle 24 moves with the rotating sleeve 5 and the blades 53. The scale is cleaned and suspended in the water, and then stirred by the water flow changed in direction by the blades 53, preventing the scale from settling in the water and then reattaching to the heat transfer tube 22 or the inner wall of the shell 21.

[0040] The present invention achieves the purpose of stirring the water flow in the shell 21 by setting the blades 53 at an angle and cooperating with the blades 53 to change the direction of the water flow, thereby increasing the contact between the water flow and the heat transfer tube 22, thereby improving the heat exchange efficiency of the heat exchanger 2, and at the same time preventing the scale from precipitating in the water when cleaning the scale, thereby ensuring the scale cleaning effect of the present invention and improving the performance of the present invention.

[0041] As an embodiment of the present invention, a cleaning groove 54 is provided on the inner side wall of the rotating sleeve 5; the cleaning groove 54 penetrates the rotating sleeve 5 in the axial direction of the worm 4, and a cleaning block 55 is provided in the rotating sleeve 5; the cleaning block 55 is made of a flexible material;

[0042] During operation, the worm 4 drives the baffle plate 24 to move, so that the worm 4 rotates relative to the inner wall of the rotating sleeve 5, and then the cleaning block 55 can brush the surface of the worm 4, so that the cleaning block 55 cleans the scale on the surface of the worm 4; when the baffle plate 24 moves with the rotating sleeve 5, the cleaning block 55 also moves with the baffle plate 24, and then all the cleaning blocks 55 on the rotating sleeve 5 can clean the surface of the entire worm 4, preventing the scale on the surface of the worm 4 from affecting the transmission between the worm 4 and the baffle plate 24, thereby affecting the movement of the baffle plate 24;

[0043] The present invention achieves the purpose of cleaning the scale on the surface of the worm 4 by rotating the worm 4 relative to the inner wall of the rotating sleeve 5, and then cooperating with the cleaning block 55 to brush the surface of the worm 4, preventing the scale on the surface of the worm 4 from affecting the transmission between the worm 4 and the baffle 24, thereby affecting the movement of the baffle 24, thereby ensuring the stability of the movement of the baffle 24 driven by the worm 4, and further ensuring the actual use effect of the present invention.

[0044] As an embodiment of the present invention, the cleaning blocks 55 are arranged in sequence, and adjacent cleaning blocks 55 can slide with each other. A telescopic spring 56 is fixedly connected to the end surface of the cleaning block 55 away from the worm 4; the other end of the telescopic spring 56 is fixedly connected to the end surface of the cleaning groove 54 away from the worm 4;

[0045] During operation, the telescopic spring 56 is in a compressed state, and the worm 4 rotates relative to the rotating sleeve 5, so that the cleaning block 55 cleans the surface of the worm 4; when the worm 4 rotates to the point where the thread on the worm 4 is located below the cleaning block 55, the telescopic spring 56 pushes the cleaning block 55 into the thread of the worm 4, so that the cleaning block 55 cleans the thread on the worm 4. As the worm 4 continues to rotate, the thread squeezes the cleaning block 55, so that the cleaning block 55 slides out of the thread, and the telescopic spring 56 returns to the compressed state; the thread on the worm 4 is then cleaned, thereby increasing the cleaning effect of the cleaning block 55, thereby ensuring the smoothness of the movement of the baffle 24, and further enhancing the actual use effect of the present invention.

[0046] As an embodiment of the present invention, both side walls of the baffle 24 are fixedly connected with a No. 2 annular block 7 and a No. 3 annular block 8; the cross-section of the No. 2 annular block 7 is triangular, the angle of the cross-section of the No. 2 annular block 7 away from the corresponding end of the baffle 24 becomes smaller, and the outer wall of the No. 2 annular block 7 fits the inner wall of the shell 21; the No. 3 annular block 8 is sleeved on the heat transfer tube 22, the cross-section of the No. 3 annular block 8 is triangular, the angle of the cross-section of the No. 3 annular block 8 away from the corresponding end of the baffle 24 becomes smaller, and the inner wall of the No. 3 annular block 8 fits the heat transfer tube 22;

[0047] During operation, the baffle plate 24 moves with the No. 2 annular block 7 and the No. 3 annular block 8, the No. 2 annular block 7 scrapes off the scale on the inner wall of the shell 21, and the No. 3 annular block 8 scrapes off the scale on the surface of the heat transfer tube 22; the cross-sections of the No. 2 annular block 7 and the No. 3 annular block 8 are pointed at one end away from the baffle plate 24, making it easier to scrape off the scale, thereby increasing the cleaning effect of the present invention, ensuring the cleanliness of the heat transfer tube 22 and the inner wall of the shell 21, and improving the heat exchange effect of the heat exchanger 2, thereby enhancing the use effect of the condensing heat pump.

[0048] As an embodiment of the present invention, the inner diameter of the No. 3 interface 213 and the No. 4 interface 214 is greater than the thickness of the baffle 24 plus the two No. 2 annular blocks 7;

[0049] During operation, the baffle 24 moves with the No. 2 annular block 7. When the baffle 24 closest to the No. 1 interface 211 moves to the top of the moving distance, the baffle 24 and the No. 2 annular block 7 cannot block the No. 3 interface 213. When the baffle 24 farthest from the No. 1 interface 211 moves to the top of the moving distance, the baffle 24 and the No. 2 annular block 7 cannot block the No. 4 interface 214. This prevents the baffle 24 and the No. 2 annular block 7 from blocking the No. 3 interface 213 and the No. 4 interface 214 when the baffle 24 and the No. 2 annular block 7 are cleaning scale, so that the No. 3 interface 213 and the No. 4 interface 214 are always connected to the inside of the shell 21, so that water always flows in and out of the heat exchanger 2, thereby ensuring the actual use effect of the present invention.

[0050] The specific workflow is as follows:

[0051] Therefore, when the condensing heat pump is working, the low-temperature refrigerant in the compressor 1 continuously absorbs low-grade heat energy in the outdoor air, brings it back to the compressor 1 to upgrade it into usable high-grade heat energy and heat the water in the condensing heat pump. After being heated, the water in the condensing heat pump flows into the heat exchanger 2 through the No. 1 interface 211, and then flows into the heat transfer tube 22 under the partition plate; when the factory uses the condensing heat pump, the water to be heated is passed into the heat exchanger 2 from the No. 3 interface 213, and flows into the space between the tube sheet 23 and the baffle plate 24. At this time, the heat transfer tube 22 can transfer the heat of the hot water in the heat transfer tube 22 to the water outside the heat transfer tube 22; the water that flows into the heat exchanger 2 through the No. 3 interface 213 then flows into the baffle plate 24 and the adjacent gap between the baffle plate 24 and the inner wall of the shell 21. The water passes through the heat transfer tube 22 again between the baffle plates 24 until the water flows out from the fourth interface 214; the water in the heat transfer tube 22 flows into the first cavity 25, and then passes through the heat transfer tube 22 above the partition plate from the first cavity 25 to heat the water flowing into the third interface 213 again, and finally flows out of the heat exchanger 2 from the second interface 212 to be heated again, and the cycle repeats like this; when the water is heated to more than 75 degrees Celsius, scale will be generated in the water and adhere to the surface of the heat transfer tube 22 and the inner wall of the shell 21. At this time, the controller regularly controls the motor 251 to rotate with the worm 4, so that the worm 4 drives the baffle 24 to slide in the shell 21, and the baffle 24 cleans the scale on the surface of the heat transfer tube 22 and the inner wall of the shell 21, and the scale is After cleaning, it is suspended in the water and discharged from the fourth interface 214 along the water flow. The controller controls the motor 251 to rotate in the opposite direction, so that the worm 4 slides the baffle 24 in the opposite direction until the baffle 24 returns to its original position, completing the process of cleaning the scale. The water that needs to be heated in the factory flows in from the third interface 213. When the water flows around the blades 53, it will be blocked by the blades 53 and change the direction of the water flow, so that it rotates in the shell 21, increasing the contact degree between the water flow and the heat transfer tube 22. When the baffle 24 moves in the heat exchanger 2, the baffle 24 moves with the rotating sleeve 5 and the blades 53. After the scale is cleaned and suspended in the water, it is stirred by the water flow that changes the flow direction of the blades 53, preventing the scale from settling in the water and then re-attaching to the heat transfer tube 22. The situation on the inner wall of the tube 22 or the shell 21 occurs; the worm 4 drives the baffle plate 24 to move, so that the worm 4 rotates relative to the inner wall of the rotating sleeve 5, and then the cleaning block 55 can brush the surface of the worm 4, so that the cleaning block 55 cleans the scale on the surface of the worm 4; when the baffle plate 24 moves with the rotating sleeve 5, the cleaning block 55 also moves with the baffle plate 24, and then all the cleaning blocks 55 on the rotating sleeve 5 can clean the surface of the entire worm 4, preventing the scale on the surface of the worm 4 from affecting the transmission between the worm 4 and the baffle plate 24, thereby affecting the movement of the baffle plate 24; the telescopic spring 56 is in a compressed state, and the worm 4 rotates relative to the rotating sleeve 5, so that the cleaning block 55 cleans the surface of the worm 4;When the worm 4 rotates to the point where the thread on the worm 4 is below the cleaning block 55, the telescopic spring 56 pushes the cleaning block 55 into the thread of the worm 4, so that the cleaning block 55 cleans the thread on the worm 4. As the worm 4 continues to rotate, the thread squeezes the cleaning block 55, so that the cleaning block 55 slides out of the thread, and the telescopic spring 56 returns to the compressed state; the thread on the worm 4 is then cleaned, which increases the cleaning effect of the cleaning block 55, thereby ensuring the smoothness of the movement of the baffle 24, so that the actual use effect of the present invention is further enhanced; the baffle 24 moves with the No. 2 annular block 7 and the No. 3 annular block 8, the No. 2 annular block 7 scrapes off the scale on the inner wall of the shell 21, and the No. 3 annular block 8 scrapes off the scale on the surface of the heat transfer tube 22; the cross-section of the No. 2 annular block 7 and the No. 3 annular block 8 is pointed at one end away from the baffle 24, so that the scale is easier to be scraped off, which increases the cleaning effect of the present invention and ensures the heat transfer The cleanliness of the inner wall of the tube 22 and the shell 21 improves the heat exchange effect of the heat exchanger 2, thereby enhancing the use effect of the condensing heat pump; the baffle 24 moves with the No. 2 annular block 7, and when the baffle 24 closest to the No. 1 interface 211 moves to the top of the moving distance, the baffle 24 and the No. 2 annular block 7 cannot block the No. 3 interface 213, and when the baffle 24 farthest from the No. 1 interface 211 moves to the top of the moving distance, the baffle 24 and the No. 2 annular block 7 cannot block the No. 4 interface 214; thereby preventing the baffle 24 and the No. 2 annular block 7 from blocking the No. 3 interface 213 and the No. 4 interface 214 when the baffle 24 and the No. 2 annular block 7 clean the scale, so that the No. 3 interface 213 and the No. 4 interface 214 are always connected with the inside of the shell 21, so that water always flows in and out of the heat exchanger 2, thereby ensuring the actual use effect of the present invention. ;

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A condensing heat pump, comprising a compressor (1), a heat exchanger (2), an evaporator (3) and a controller; the heat exchanger (2) comprises a shell (21), a heat transfer tube (22), a tube sheet (23), a baffle (24) and a first cavity (25); the shell (21) is fixedly connected with a first interface (211), a second interface (212), a third interface (213) and a fourth interface (214); the number of the tube sheets (23) is two, and the two tube sheets (23) are respectively located at two ends of the shell (21); the characteristics are: A motor (251) is provided in the first cavity (25); the motor (251) is fixedly connected to the tube sheet (23); the output end of the motor (251) passes through the tube sheet (23); the output end of the motor (251) is fixedly connected to a worm (4); the other end of the worm (4) passes through the baffle (24) and is rotationally connected to another tube sheet (23); the worm (4) and the baffle (24) are threadedly connected; the baffle (24) and the heat transfer tube (22) and the shell (21) are slidably connected; A rotating sleeve (5) is sleeved on the worm (4); the number of the rotating sleeves (5) is the same as the number of the baffles (24); the position of the rotating sleeve (5) corresponds to the baffle (24); the rotating sleeve (5) is located on a side of the baffle (24) close to the first interface (211); the rotating sleeve (5) is fixedly connected to the corresponding baffle (24); blades (53) are fixedly connected to the outer side of the rotating sleeve (5); the blades (53) are arranged obliquely; A cleaning groove (54) is provided on the inner side wall of the rotating sleeve (5); a cleaning block (55) is provided in the cleaning groove (54); the cleaning block (55) is made of a flexible material; The cleaning blocks (55) are arranged in sequence, and adjacent cleaning blocks (55) can slide against each other. A telescopic spring (56) is fixedly connected to the end surface of the cleaning block (55) away from the worm (4); the other end of the telescopic spring (56) is fixedly connected to the end surface of the cleaning groove (54) away from the worm (4); The two side walls of the baffle (24) are both fixedly connected with a No. 2 annular block (7) and a No. 3 annular block (8); the cross-section of the No. 2 annular block (7) is in the shape of a triangle, the angle of the cross-section of the No. 2 annular block (7) becomes smaller as it moves away from the corresponding end of the baffle (24), and the outer wall of the No. 2 annular block (7) fits the inner wall of the shell (21); the No. 3 annular block (8) is sleeved on the heat transfer tube (22), the cross-section of the No. 3 annular block (8) is in the shape of a triangle, the angle of the cross-section of the No. 3 annular block (8) becomes smaller as it moves away from the corresponding end of the baffle (24), and the inner wall of the No. 3 annular block (8) fits the heat transfer tube (22); The inner diameters of the No. 3 interface (213) and the No. 4 interface (214) are greater than the thickness of the baffle plate (24) plus the two No. 2 annular blocks (7).

Images