Energy-saving air conditioner circulating pump

Abstract

The application relates to the technical field of circulating pumps, in particular to an energy-saving air conditioner circulating pump, which comprises a pump shell, a driving motor installed on the pump shell, an impeller fixedly connected to the output end of the driving motor and a cleaning sheet arranged at the periphery of the impeller and used for cleaning the water scale on the inner wall of the pump shell, the output end of the driving motor extends into the pump shell, the impeller is located in the pump shell and the center of the impeller is concentric with the center of the pump shell, the edge of the cleaning sheet is in the shape of a circular arc, opposite sides of the pump shell are respectively provided with a water inlet end and a water outlet end which are communicated with the internal space of the pump shell, when the driving motor drives the impeller to rotate, the cleaning sheet rotates synchronously, the water scale adhered to the inner wall of the pump shell is scraped off through mechanical friction in the rotating process of the cleaning sheet, the water scale is prevented from accumulating in the internal space of the pump shell and affecting the refrigeration efficiency, and the purpose that the water scale on the inner wall of the pump shell can be cleaned without disassembling the circulating pump after the use of the circulating pump is achieved.

Description

Technical Field

[0001] This application relates to the technical field of circulating pumps, and in particular to an energy-saving air conditioning circulating pump. Background Technology

[0002] Energy-saving air conditioning circulating pumps are key equipment in air conditioning systems used for circulating chilled (hot) water. They efficiently replenish or discharge chilled (hot) water, aiding the cooling (heating) process. They operate via electronic control or external drive (such as variable frequency speed control), and their control principles encompass timer switching, fuzzy control, and PLC control, enabling real-time monitoring and fault diagnosis. Featuring a compact structure, stable operation, low noise, and high energy efficiency, they are suitable for various locations such as office buildings, shopping malls, hotels, and factories, significantly reducing energy consumption and improving system operating efficiency.

[0003] However, existing energy-saving air conditioning circulating pumps often encounter a technical problem after a period of use: the cooling water in the pump is rich in unstable salts such as calcium bicarbonate. When the heat exchange tube walls are heated, these salts transform into dense, hard scale such as calcium carbonate, which deposits on the inner wall of the pump casing. Scale has very poor thermal conductivity, with a coefficient far lower than that of metal materials. Once scale forms on the inner wall of the pump casing, it significantly reduces heat exchange efficiency, leading to excessively high condensing temperatures, excessively high exhaust pressures, and reduced cooling efficiency. To address this problem, existing technologies typically only notify maintenance personnel when the user notices a decrease in cooling efficiency. However, by this time, the scale has already been deposited for a long time, making cleaning very troublesome and requiring the complete disassembly of the energy-saving air conditioning circulating pump to clean the inside of the pump casing. Therefore, this application proposes an energy-saving air conditioning circulating pump that allows for the cleaning of scale on the inner wall of the pump casing without disassembling the pump after use. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the purpose of this application is to provide an energy-saving air conditioning circulation pump that allows for the cleaning of scale on the inner wall of the pump casing without disassembling the pump after use.

[0005] The above-mentioned objective of this application is achieved through the following technical solution: an energy-saving air conditioning circulation pump, comprising a pump casing, a drive motor mounted on the pump casing, and an impeller fixedly connected to the output end of the drive motor. A cleaning plate for cleaning scale on the inner wall of the pump casing is fixedly arranged around the impeller. The output end of the drive motor extends into the pump casing. The impeller is located inside the pump casing and its center is concentric with the center of the pump casing. The edge of the cleaning plate is arc-shaped. An inlet end and an outlet end communicating with the internal space of the pump casing are respectively installed on opposite sides of the pump casing.

[0006] By adopting the above technical solution, the cleaning plate is directly installed on the impeller. When the drive motor drives the impeller to rotate, the cleaning plate rotates synchronously. During the rotation, the cleaning plate scrapes off the scale adhering to the inner wall of the pump casing through mechanical friction, preventing scale from accumulating inside the pump casing and affecting the cooling efficiency. At the same time, the cleaning plate can remove scale in time, which can prevent the pump casing from being corroded by scale, extend the service life of the equipment, and reduce the frequency of manual disassembly and cleaning, thereby reducing maintenance costs and time. Moreover, because the edge of the cleaning plate is arc-shaped, it can fit the curvature of the inner wall of the pump casing, ensuring stable contact with the inner wall during rotation and avoiding jamming or wear. This achieves the goal of cleaning the scale on the inner wall of the pump casing without disassembling the circulating pump after use.

[0007] Furthermore, the pump casing inner wall is provided with two sets of extrusion assemblies for attaching cleaning sheets, and the two sets of extrusion assemblies surround the impeller.

[0008] Furthermore, the extrusion assembly includes a receiving groove formed on the inner wall of the pump housing, an arc-shaped extrusion block slidably inserted into the receiving groove, and a push spring disposed in the receiving groove for pushing the arc-shaped extrusion block out of the receiving groove to attach the cleaning sheet.

[0009] While the above technical solution achieves the goal of cleaning scale on the inner wall of the pump casing without disassembling the pump after use, the cleaning plate itself experiences friction each time it scrapes away the scale. Given the long operating time of the pump, the cleaning plate's end wears down after a period of use, preventing it from contacting the pump casing for cleaning, resulting in a very short lifespan. The extrusion assembly solves this problem. By using an arc-shaped extrusion block instead of the pump casing's inner wall, the extrusion block adheres to the cleaning plate when the pump is not in operation. When the pump is in operation, cooling water enters the pump casing. Due to the limited space inside the casing, the water flow forces the arc-shaped extrusion block into a receiving groove, compressing the push spring. At this point, the cleaning plate no longer contacts the arc-shaped extrusion block, and the impeller... The cleaning plate rotates synchronously. Since the arc-shaped extrusion block has retracted into the receiving groove, the cleaning plate will not experience any friction during this process, and therefore will not wear out. After the air conditioning unit stops working, the staff turns off the entire air conditioning unit, the drive motor stops rotating, and cooling water is no longer input into the pump casing. After the arc-shaped extrusion block loses the pressure of the water flow, the push spring pushes the arc-shaped extrusion block out of the receiving groove to attach to the cleaning plate. At this time, the staff restarts the drive motor through the control circuit, so that the impeller drives the cleaning plate to rotate synchronously. The rotating cleaning plate mechanically scrapes away the scale attached to the arc-shaped extrusion block, so that the cleaning plate will not wear out during the normal operation of the circulating pump, thereby improving the service life of the cleaning plate. Moreover, because the arc-shaped extrusion block is pushed by the spring, when the cleaning plate wears out after a period of use, the push spring will further push the arc-shaped extrusion block to attach to the cleaning plate, further improving the service life of the cleaning plate.

[0010] Furthermore, the periphery of the end of the arc-shaped extrusion block away from the push spring is provided with a filling structure for filling the gap between the arc-shaped extrusion block and the receiving groove.

[0011] Furthermore, the filling structure includes a filling strip fixedly disposed on the edge of the arc-shaped extrusion block away from the push spring, and a filling cloth disposed around and surrounding the arc-shaped extrusion block. One end of the filling cloth is fixedly connected to the filling strip, and the other end is fixedly connected to the pump housing around the receiving groove.

[0012] While the above technical solution improves the service life of the cleaning pad by using the extrusion component, the surface of the arc-shaped extrusion block rubs against the inner wall of the storage groove during the process of the arc-shaped extrusion block extending out of the storage groove. This causes a gap to appear between the arc-shaped extrusion block and the storage groove after a period of use. This gap can easily allow cooling water to flow into the storage groove, which may prevent the water pressure from properly forcing the arc-shaped extrusion block to retract into the storage groove. The filling structure solves this technical problem. When the cooling water flows into the pump casing, the filling cloth first blocks the cooling water flow, preventing it from entering the gap between the arc-shaped extrusion block and the storage groove. At this time, the cooling water flow forces the arc-shaped extrusion block to retract into the storage groove. The edge of the filling strip abuts against the edge of the storage groove, causing the filling cloth to fold and preventing scale from forming on the surface of the filling cloth. Furthermore, the filling strip prevents the arc-shaped extrusion block from completely retracting into the storage groove.

[0013] Furthermore, a cleaning device for cleaning scale is provided on the outside of the pump casing.

[0014] Furthermore, the cleaning device includes a water storage tank, a connecting pipe disposed on the side of the water storage tank near the pump casing and connected to the outlet end, a connecting pipe disposed on the side of the water storage tank near the pump casing and connected to the inlet end, a small water pump disposed on one end of the connecting pipe connected to the outlet end and used to extract water flow from inside the outlet end, and a small water inlet pump disposed on the connecting pipe and used to extract water flow from inside the water storage tank. The connecting pipe is located below the outlet end, and the water storage tank stores cooling water.

[0015] While the above technical solution improves the lifespan of the cleaning plate by using the extrusion assembly, the scale scraped off accumulates on the bottom surface inside the pump casing. Although this does not affect the heat exchange efficiency of the pump casing, it does affect the rotation of the impeller. Long-term accumulation of scale may cause the impeller to become stuck and unable to rotate. The cleaning device solves this technical problem. After the cleaning plate scrapes off the scale, the operator starts a small water pump and a small inlet pump. The small inlet pump pumps cooling water from the storage tank into the pump casing through a connecting pipe (the cooling water in the storage tank has not undergone a heating process, so it does not form scale). After the cooling water flows into the pump casing, it compresses the arc-shaped extrusion block to contract, and the scale is carried away by the cooling water. When the cooling water flows to the outlet of the pump casing, the small water pump draws the cooling water with scale back into the storage tank, preventing scale from accumulating inside the pump casing and affecting the rotation of the impeller.

[0016] Furthermore, the storage tank is equipped with an interception net for intercepting scale inside. The interception net is L-shaped and one end is fixedly connected to one side of the connecting pipe inside the storage tank, while the other end is fixedly connected to the side of the storage tank inside the connecting pipe.

[0017] While the cleaning device can remove scale from the pump casing, the small inlet pump may also pump scale from the storage tank into the pump casing when pumping cooling water from the storage tank. The interceptor net solves this problem. When the small inlet pump pumps cooling water from the storage tank into the pump casing, the cooling water flows within the storage tank and prepares to enter the connecting pipe. Scale particles move with the water flow. The interceptor net acts as a barrier; its mesh size (which can be set appropriately according to actual needs, for example, 0.3-0.8 mm) can block scale particles larger than the mesh size from passing through. When these scale particles encounter the interceptor net, they are blocked and adhere to its surface, thus preventing scale from entering the connecting pipe and subsequently the pump casing. Furthermore, the L-shaped interceptor net alters the flow direction of the cooling water. When the water flow impacts the interceptor net, eddies and turbulence are formed on its surface, changing the trajectory of the scale particles. Scale particles that might otherwise flow directly into the connecting pipe are more likely to collide with and be intercepted by the interception net due to the eddies and turbulence. Simultaneously, this change in water flow direction helps to further secure the scale particles already attached to the net, preventing them from being washed away again. Finally, the L-shaped net effectively prevents scale buildup at the opening of the connecting pipe, thus preventing blockages caused by scale clogging.

[0018] Furthermore, the surface of the arc-shaped extrusion block is coated with a wear-resistant coating.

[0019] By adopting the above technical solutions, its wear resistance and corrosion resistance can be improved, and its service life can be extended.

[0020] Furthermore, the interception net has a double-layer structure, with the inner layer being a stainless steel filter and the outer layer being a nylon filter with coarse mesh.

[0021] By adopting the above technical solution, the stainless steel filter screen can effectively intercept tiny scale particles, while the nylon filter screen is mainly used for preliminary filtration of larger impurities, reducing the burden on the inner stainless steel filter screen. The double-layer structure design improves the interception efficiency and service life of the filter screen.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. With the cleaning plate in place, when the drive motor rotates the impeller, the cleaning plate rotates synchronously. During the rotation, the cleaning plate scrapes off the scale adhering to the inner wall of the pump casing through mechanical friction, preventing scale buildup inside the pump casing from affecting cooling efficiency. At the same time, the cleaning plate can remove scale in time, preventing the pump casing from being corroded by scale, extending the service life of the equipment, and reducing the frequency of manual disassembly and cleaning, thus reducing maintenance costs and time. Furthermore, because the edge of the cleaning plate is arc-shaped, it can conform to the curvature of the inner wall of the pump casing, ensuring stable contact with the inner wall during rotation, avoiding jamming or wear. This achieves the goal of cleaning the scale on the inner wall of the pump casing without disassembling the circulating pump after use.

[0024] 2. By designing the extrusion assembly, the cleaning plate does not contact the arc-shaped extrusion block when the circulation pump is in operation, preventing wear on the cleaning plate. When the circulation pump is not in operation, the arc-shaped extrusion block is attached to the cleaning plate. When the drive motor is started, the cleaning plate rotates, mechanically scraping away the scale attached to the arc-shaped extrusion block. This prevents wear on the cleaning plate during normal operation of the circulation pump, thus extending its service life. Furthermore, because the arc-shaped extrusion block is a driven spring, when the cleaning plate wears out after a period of use, the driven spring will further push the arc-shaped extrusion block to adhere to the cleaning plate, further extending its service life. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the embodiment;

[0026] Figure 2 This is a schematic diagram of the internal structure of the pump casing;

[0027] Figure 3 It is along Figure 2 Sectional view of line AA in the middle;

[0028] Figure 4 yes Figure 3 Enlarged view of section A.

[0029] Reference numerals: 1. Pump casing; 10. Drive motor; 11. Impeller; 12. Cleaning plate; 13. Inlet end; 14. Outlet end; 2. Extrusion assembly; 20. Collection trough; 21. Arc-shaped extrusion block; 22. Push spring; 3. Filling structure; 30. Filling strip; 31. Filling cloth; 4. Cleaning device; 40. Storage tank; 41. Connecting pipe; 42. Connecting pipe; 43. Small water pump; 44. Small inlet pump; 5. Interception net. Detailed Implementation

[0030] The present application will be further described in detail below with reference to the accompanying drawings.

[0031] Example, refer to Figure 1 , Figure 2 An energy-saving air conditioning circulation pump includes a pump housing 1, a drive motor 10 mounted on the pump housing 1, an impeller 11 fixedly connected to the output end of the drive motor 10, and a cleaning plate 12 disposed around the impeller 11 for cleaning scale on the inner wall of the pump housing 1. The output end of the drive motor 10 extends into the pump housing 1, the impeller 11 is located inside the pump housing 1 and its center is concentric with the center of the pump housing 1, and the edge of the cleaning plate 12 is arc-shaped. On opposite sides of the pump housing 1, an inlet end 13 and an outlet end 14 communicating with the internal space of the pump housing 1 are respectively installed. The drive motor 10 and the impeller 11 are existing technologies and will not be described in detail here. As for the cleaning plate 12, it can be installed on the periphery of the impeller 11 by snap-fit, welding or bonding.

[0032] The cleaning plate 12 is directly installed on the impeller 11. When the drive motor 10 drives the impeller 11 to rotate, the cleaning plate 12 rotates synchronously. During the rotation, the cleaning plate 12 scrapes off the scale adhering to the inner wall of the pump casing 1 through mechanical friction, preventing scale from accumulating inside the pump casing 1 and affecting the cooling efficiency. At the same time, the cleaning plate 12 can remove scale in time, which can prevent the pump casing 1 from being corroded by scale, extend the service life of the equipment, and reduce the frequency of manual disassembly and cleaning, thereby reducing maintenance costs and time. In addition, because the edge of the cleaning plate 12 is arc-shaped, it can fit the curvature of the inner wall of the pump casing 1, ensuring stable contact with the inner wall during rotation, avoiding jamming or wear. This achieves the purpose of cleaning the scale on the inner wall of the pump casing 1 without disassembling the circulating pump after use.

[0033] In other embodiments, a timer can be set in the drive motor 10 to automatically start the cleaning program after the circulating pump has accumulated a certain amount of time. That is, the drive motor 10 is started at a timer so that the impeller 11 drives the cleaning plate 12 to rotate synchronously and clean the scale attached to the inner wall of the pump casing 1.

[0034] Although the cleaning plate 12 achieves the purpose of cleaning the scale on the inner wall of the pump housing 1 without disassembling the pump after use, the cleaning plate 12 itself also experiences some friction each time it scrapes off the scale adhering to the inner wall of the pump housing 1 through mechanical friction. However, the operating time of the circulation pump is relatively long, which leads to wear at the end of the cleaning plate 12 after a period of use, preventing it from contacting the inside of the pump housing 1 for cleaning. This results in a very short service life for the cleaning plate 12. To solve this technical problem, refer to... Figure 3In this embodiment, two sets of extrusion assemblies 2 for attaching cleaning sheets 12 are provided on the inner wall of the pump casing 1. The two sets of extrusion assemblies 2 surround the impeller 11. The extrusion assembly 2 includes a receiving groove 20 opened on the inner wall of the pump casing 1, an arc-shaped extrusion block 21 slidably inserted into the receiving groove 20, and a push spring 22 provided in the receiving groove 20 for pushing the arc-shaped extrusion block 21 out of the receiving groove 20 to attach the cleaning sheet 12. The surface of the arc-shaped extrusion block 21 is coated with a wear-resistant coating to improve the wear resistance and corrosion resistance of the arc-shaped extrusion block 21 and extend its service life. As for the push spring 22, multiple springs are provided to ensure that the arc-shaped extrusion block 21 has sufficient thrust to attach the cleaning sheet 12.0.

[0035] By setting the extrusion component 2, the arc-shaped extrusion block 21 replaces the inner wall of the pump housing 1. When the circulation pump is not in operation, the arc-shaped extrusion block 21 is attached to the cleaning plate 12. When the circulation pump is in operation, cooling water enters the pump housing 1. Due to the limited space inside the pump housing 1, the water flow will squeeze the arc-shaped extrusion block 21 into the receiving groove 20, squeezing the push spring 22. At this time, the cleaning plate 12 no longer contacts the arc-shaped extrusion block 21, and the impeller 11 drives the cleaning plate 12 to rotate synchronously. Since the arc-shaped extrusion block 21 has been retracted into the receiving groove 20, the cleaning plate 12 will not generate any friction during this process, and therefore will not be worn. After the air conditioning unit stops working, the staff turns off the entire air conditioning unit, the drive motor 10 stops rotating, and the cooling water no longer... When water is fed into the pump housing 1, the arc-shaped extrusion block 21 loses pressure and is pushed by the spring 22 to extend out of the receiving groove 20 and attach to the cleaning plate 12. At this time, the operator restarts the drive motor 10 through the control circuit, so that the impeller 11 drives the cleaning plate 12 to rotate synchronously. The rotating cleaning plate 12 mechanically scrapes away the scale attached to the arc-shaped extrusion block 21, so that the cleaning plate 12 will not be worn during the normal operation of the circulating pump, thereby improving the service life of the cleaning plate 12. Moreover, since the arc-shaped extrusion block 21 is pushed by the spring 22, when the cleaning plate 12 wears out after a period of use, the spring 22 will further push the arc-shaped extrusion block 21 to attach to the cleaning plate 12, further improving the service life of the cleaning plate 12.

[0036] Although the extrusion assembly 2 improves the service life of the cleaning pad 12, during the process of the arc-shaped extrusion block 21 extending out of the storage groove 20, the peripheral surface of the arc-shaped extrusion block 21 rubs against the inner wall of the storage groove 20. This causes a gap to appear between the arc-shaped extrusion block 21 and the storage groove 20 after a period of use. This gap can easily allow cooling water to flow into the storage groove 20, which may result in the water pressure not being able to properly compress the arc-shaped extrusion block 21 into the storage groove 20. To solve this technical problem, refer to... Figure 4In this embodiment, a filling structure 3 is provided around the end of the arc-shaped extrusion block 21 away from the push spring 22 for filling the gap between the arc-shaped extrusion block 21 and the receiving groove 20. The filling structure 3 includes a filling strip 30 fixedly disposed on the edge of the end of the arc-shaped extrusion block 21 away from the push spring 22 and a filling cloth 31 disposed around the arc-shaped extrusion block 21 and surrounding the arc-shaped extrusion block 21. One end of the filling cloth 31 is fixedly connected to the filling strip 30, and the other end is located around the receiving groove 20 and fixedly connected to the pump housing 1.

[0037] By using the filling structure 3, when cooling water flows into the pump casing 1, the filling cloth 31 first blocks the cooling water flow, preventing it from entering the gap between the arc-shaped extrusion block 21 and the receiving groove 20. At this time, the cooling water flow forces the arc-shaped extrusion block 21 to retract into the receiving groove 20, and the edge of the filling strip 30 abuts against the edge of the receiving groove 20, causing the filling cloth 31 to fold, preventing scale from forming on the surface of the filling cloth 31. Furthermore, the filling strip 30 prevents the arc-shaped extrusion block 21 from completely retracting into the receiving groove 20.

[0038] Although the extrusion assembly 2 improves the service life of the cleaning plate 12, the scale scraped off will accumulate on the bottom surface inside the pump housing 1. While this will not affect the heat exchange efficiency of the pump housing 1, it will affect the rotation of the impeller 11. Long-term accumulation of scale may cause the impeller 11 to become stuck and unable to rotate. To solve this technical problem, this embodiment provides a cleaning device 4 for cleaning scale on the outside of the pump housing 1. The cleaning device 4 includes a water storage tank 40 and a device disposed on the side of the water storage tank 40 near the pump housing 1 and connected to the water outlet 1. The storage tank 40 has a connecting pipe 41, a connecting pipe 42 located on the side of the storage tank 40 near the pump casing 1 and connected to the inlet end 13, a small water pump 43 located on the end of the connecting pipe 41 connected to the outlet end 14 and used to extract water from the inside of the outlet end 14, and a small inlet pump 44 located on the connecting pipe 42 for extracting water from the inside of the storage tank 40. The connecting pipe 41 is located below the outlet end 14. The storage tank 40 stores cooling water. The small inlet pump 44 and the small water pump 43 are both pipeline pumps in the prior art.

[0039] With the cleaning device 4 in place, after the cleaning plate 12 scrapes off the scale, the staff starts the small water pump 43 and the small water inlet pump 44. The small water inlet pump 44 pumps the cooling water in the storage tank 40 into the pump casing 1 through the connecting pipe 42 (the cooling water in the storage tank 40 has not undergone a heating step, so it will not form scale). After the cooling water flows into the pump casing 1, it compresses the arc-shaped extrusion block 21 to contract, and at the same time the scale is carried away by the cooling water. When the cooling water flows to the outlet 14 of the pump casing 1, the small water pump 43 pumps the cooling water with scale into the storage tank 40 to prevent scale from accumulating inside the pump casing 1 and affecting the rotation of the impeller 11.

[0040] In other embodiments, timers can be set in the small inlet pump 44 and the small pump 43 to automatically start the small inlet pump 44 and the small pump 43 after the circulating pump has accumulated a certain amount of time. That is, the small inlet pump 44 and the small pump 43 are timed, making the cleaning of the circulating pump more convenient and easy. However, the timer is only suitable for large factories, where the working hours are relatively fixed and do not change much. Therefore, there is only a very small probability that the cleaning time will be incorrect when the timer is set. However, the working hours of small factories vary more. After setting the timer, the small inlet pump 44 and the small pump 43 will often start on their own when the air conditioning unit is not in use. Therefore, the method of manually starting the small inlet pump 44 and the small pump 43 is more suitable for small factories.

[0041] Although the cleaning device 4 can remove scale from the inside of the pump housing 1, when the small inlet pump 44 pumps the cooling water in the storage tank 40 into the pump housing 1, it may also pump the scale stored in the storage tank 40 into the pump housing 1. In order to solve this technical problem, this embodiment provides an interception net 5 for intercepting scale inside the storage tank 40. The interception net 5 is L-shaped and one end is fixedly connected to one side of the connecting pipe 42 inside the storage tank 40, and the other end is fixedly connected to the side of the storage tank 40 near the connecting pipe 42.

[0042] When the small inlet pump 44 pumps cooling water from the storage tank 40 into the pump casing 1, the cooling water flows within the storage tank 40 and prepares to enter the connecting pipe 42. Scale particles move along with the water flow. The intercepting net 5 acts as a barrier; its mesh size (which can be set according to actual needs, for example, 0.3-0.8 mm) can block scale particles larger than the mesh size from passing through. When these scale particles encounter the intercepting net 5, they are blocked and adhere to its surface, thus preventing scale from entering the connecting pipe 42 and subsequently the pump casing 1. Furthermore, the presence of the L-shaped intercepting net 5 alters the flow direction of the cooling water. When the water flow impacts the intercepting net 5, eddies and turbulence are formed on its surface, changing the trajectory of the scale particles. Scale particles that might otherwise flow directly to the connecting pipe 42 are more likely to collide with and be intercepted by the intercepting net 5 under the influence of eddies and turbulence. At the same time, this change in water flow direction also helps to further fix the scale particles that have already adhered to the interception net 5, preventing them from being washed away by the water flow again. Finally, the L-shaped interception net 5 can effectively prevent scale from accumulating at the opening of the connecting pipe 42, preventing scale from clogging the connecting pipe 42 and causing the connecting pipe 42 to become blocked.

[0043] In other embodiments, the interception net 5 can also be directly placed inside the connecting pipe 42. Although this can also prevent scale from entering the connecting pipe 42 and then the pump casing 1, the scale will enter the connecting pipe 42 with the water flow, causing the connecting pipe 42 to become blocked.

[0044] In this embodiment, the interceptor mesh 5 has a double-layer structure. The inner layer of the interceptor mesh 5 is a stainless steel filter screen, and the outer layer is a nylon filter screen with coarse mesh. The stainless steel filter screen can effectively intercept tiny scale particles, while the nylon filter screen is mainly used for preliminary filtration of larger impurities, reducing the burden on the inner stainless steel filter screen. The double-layer structure design improves the interception efficiency and service life of the interceptor mesh 5.

[0045] Specific implementation process: When the circulating pump is in operation, cooling water flows into the pump casing 1, squeezing the arc-shaped squeezing block 21 into the receiving groove 20 and squeezing the push spring 22, so that the cleaning plate 12 no longer contacts the arc-shaped squeezing block 21. During this process, the unstable salts in the heated cooling water will turn into scale and adhere to the arc-shaped squeezing block 21. At the same time, due to the impact of the water flow, the scale will not adhere too tightly. When the air conditioning unit stops working, the operator turns off the entire air conditioning unit, the drive motor 10 stops rotating, and cooling water no longer enters the pump casing 1. After the arc-shaped squeezing block 21 loses the pressure of the water flow, the push spring 22 pushes the arc-shaped squeezing block 21 out of the receiving groove 20 to adhere to the cleaning plate 12. At this time, the system is restarted through the control circuit. The drive motor 10 causes the impeller 11 to drive the cleaning blade 12 to rotate synchronously. The rotating cleaning blade 12 mechanically scrapes away the scale attached to the arc-shaped extrusion block 21. Then, the small water pump 43 and the small inlet pump 44 are started. The small inlet pump 44 pumps the cooling water in the storage tank 40 into the pump casing 1 through the connecting pipe 42. After the cooling water flows into the pump casing 1, it compresses the arc-shaped extrusion block 21 to contract. At the same time, the scale is carried away by the cooling water. When the cooling water flows to the outlet 14 of the pump casing 1, the small water pump 43 pumps the cooling water with scale into the storage tank 40. The staff only needs to clean the scale inside the storage tank 40 periodically. There is no need to disassemble the entire circulation pump, which makes the cleaning of scale inside the circulation pump more convenient.

[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An energy-saving air conditioning circulating pump, comprising a pump casing (1), a drive motor (10) mounted on the pump casing (1), and an impeller (11) fixedly connected to the output end of the drive motor (10), characterized in that, The impeller (11) is fixedly provided with a cleaning plate (12) for cleaning scale on the inner wall of the pump casing (1). The output end of the drive motor (10) extends into the pump casing (1). The impeller (11) is located inside the pump casing (1) and its center is concentric with the center of the pump casing (1). The edge of the cleaning plate (12) is arc-shaped. The pump casing (1) is provided with an inlet end (13) and an outlet end (14) that communicate with the internal space of the pump casing (1) on opposite sides. The pump housing (1) has two sets of extrusion assemblies (2) for attaching cleaning sheets (12) on its inner wall. The two sets of extrusion assemblies (2) surround the impeller (11). The extrusion assembly (2) includes a receiving groove (20) opened on the inner wall of the pump housing (1), an arc-shaped extrusion block (21) slidably inserted into the receiving groove (20), and a push spring (22) set in the receiving groove (20) for pushing the arc-shaped extrusion block (21) out of the receiving groove (20) to attach the cleaning sheet (12). The arc-shaped extrusion block (21) is provided with a filling structure (3) around the end away from the push spring (22) for filling the gap between the arc-shaped extrusion block (21) and the receiving groove (20); the filling structure (3) includes a filling strip (30) fixedly disposed on the edge of the end of the arc-shaped extrusion block (21) away from the push spring (22) and a filling cloth (31) disposed around the arc-shaped extrusion block (21) and surrounding the arc-shaped extrusion block (21), one end of the filling cloth (31) is fixedly connected to the filling strip (30), and the other end is located around the receiving groove (20) and fixedly connected to the pump housing (1).

2. The energy-saving air conditioning circulating pump according to claim 1, characterized in that, The pump casing (1) is provided with a cleaning device (4) for cleaning scale.

3. The energy-saving air conditioning circulating pump according to claim 2, characterized in that, The cleaning device (4) includes a storage tank (40), a connecting pipe (41) disposed on the side of the storage tank (40) near the pump casing (1) and connected to the outlet end (14), a connecting pipe (42) disposed on the side of the storage tank (40) near the pump casing (1) and connected to the inlet end (13), a small water pump (43) disposed on one end of the connecting pipe (41) connected to the outlet end (14) and used to extract water from the inside of the outlet end (14), and a small inlet pump (44) disposed on the connecting pipe (42) and used to extract water from the inside of the storage tank (40). The connecting pipe (41) is located below the outlet end (14), and the storage tank (40) stores cooling water.

4. The energy-saving air conditioning circulating pump according to claim 3, characterized in that, The storage tank (40) is equipped with an interception net (5) for intercepting scale. The interception net (5) is L-shaped and one end is fixedly connected to one side of the connecting pipe (42) inside the storage tank (40), and the other end is fixedly connected to the side of the storage tank (40) near the connecting pipe (42).

5. The energy-saving air conditioning circulating pump according to claim 1, characterized in that, The surface of the arc-shaped extrusion block (21) is coated with a wear-resistant coating.

6. The energy-saving air conditioning circulating pump according to claim 4, characterized in that, The interception net (5) has a double-layer structure. The inner layer of the interception net (5) is a stainless steel filter, and the outer layer is a nylon filter with coarse mesh.

Images