High-reliability variable frequency water pump

Abstract

The utility model provides a high-reliability variable frequency water pump which comprises a pump shell, a water inlet pipe and a water outlet pipe are fixed and communicated on the pump shell, a power motor is fixedly connected on the pump shell, the power motor is located between the water inlet pipe and the water outlet pipe, and a centrifugal impeller driven by the power motor is rotatably connected in the pump shell. The centrifugal impeller rotates and sucks water into the pump shell from the water inlet pipe and then guides the water out of the water outlet pipe, a variable frequency controller is fixedly connected to the side wall of the pump shell, the variable frequency controller is electrically connected with the power motor and comprises a shell body, a controller and a heat dissipation box, the shell body is fixed to the side wall of the pump shell, the controller is fixed in the heat dissipation box, and the heat dissipation box is electrically connected with the variable frequency controller. The heat dissipation box is located in the shell, a heat dissipation area is formed between the heat dissipation box and the shell, a branch pipe communicated with the heat dissipation area is fixed to the water outlet pipe, wire holes are formed in the heat dissipation box and the shell, sealing blocks are fixedly connected to the wire holes, and the purposes of improving heat dissipation performance and operation reliability are achieved.

Description

Technical Field

[0001] This utility model relates to variable frequency water pumps, and more particularly, to a high-reliability variable frequency water pump. Background Technology

[0002] Currently, Chinese patent CN220667893U discloses a novel variable frequency water pump, comprising: a base, a variable frequency motor, a variable frequency controller, a pump head, an impeller, an inlet pipe, and an outlet pipe. The variable frequency motor is positioned above the base, the variable frequency controller is fixedly installed on top of the variable frequency motor and electrically connected to the variable frequency motor, the pump head is positioned on one side of the variable frequency motor, the impeller is disposed inside the pump head and connected to the output shaft of the variable frequency motor, the inlet pipe is fixedly installed on one side of the pump head, and the outlet pipe is fixedly installed on top of the pump head.

[0003] This new type of variable frequency water pump avoids the expansion of the water pipe at the connection point due to water pressure changes, thus improving the tightness of the connection. However, in summer, especially in the hotter southern regions of my country, where the pumps are typically used outdoors, the environment is harsher, making the electronic components inside the variable frequency controller prone to overheating and damage. Of course, some variable frequency water pumps are placed entirely within water containers, such as aquariums. As the water level drops, the variable frequency controller cannot fully contact the water, causing localized overheating and potential damage. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a high-reliability variable frequency water pump to improve heat dissipation and operational reliability.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a high-reliability variable frequency water pump, including a pump casing, an inlet pipe and an outlet pipe fixed and connected to the pump casing, a power motor fixedly connected to the pump casing, the power motor being located between the inlet pipe and the outlet pipe, a centrifugal impeller driven by the power motor being rotatably connected inside the pump casing, the centrifugal impeller rotating and drawing water from the inlet pipe into the pump casing and then out through the outlet pipe, a variable frequency controller being fixedly connected to the side wall of the pump casing, the variable frequency controller being electrically connected to the power motor, the variable frequency controller including a housing, a controller and a heat sink, the housing being fixed to the side wall of the pump casing, the controller being fixed inside the heat sink, the heat sink being located inside the housing, a heat dissipation area being formed between the heat sink and the housing, a branch pipe communicating with the heat dissipation area being fixedly connected to the outlet pipe, wire holes being provided on both the heat sink and the housing, and sealing blocks being fixedly connected to the wire holes.

[0006] To achieve the above technical solution, an electrical wire is threaded through the wire hole into the heat sink box and electrically connected to the controller. One end of the wire is then electrically connected to the controller, and the other end passes through the heat sink box, the housing, and the pump housing before being electrically connected to the drive motor. When the drive motor starts, the centrifugal impeller rotates, drawing water from the inlet pipe into the pump housing. The water is then pumped from the pump housing into the outlet pipe, and a portion of the water is pumped into the heat dissipation area through the branch pipe. The heat generated by the controller is transferred to the heat sink box. Because the heat sink box is in contact with the water, the controller's heat dissipation is greatly improved. As the water level decreases, as long as water is injected into the outlet pipe, water will inevitably be pumped into the heat dissipation area through the branch pipe until all the water is pumped out, thus ensuring extremely high reliability.

[0007] As a preferred embodiment of this utility model, a water distribution hole is provided on the side wall of the shell, the water distribution hole is connected to the heat dissipation area, and a plunger or water distribution pipe is connected to the water distribution hole.

[0008] To achieve the above technical solution, the water distribution pipe is connected to the water distribution hole, which allows water to be injected into another location through the water distribution pipe, thereby improving practicality; the water distribution pipe is removed from the water distribution hole, which allows for easy cleaning of the outer wall of the heat sink and the inner wall of the housing, and the water distribution hole is sealed with a plunger after cleaning.

[0009] As a preferred embodiment of this utility model, an adjusting rod is rotatably connected to the side wall of the housing, and an adjusting plate is slidably connected to the side of the housing near the branch pipe. The adjusting rod rotates and moves the adjusting plate closer to or further away from the branch pipe through a transmission component.

[0010] To achieve the above technical solution, the adjusting rod is rotated, and the adjusting plate is moved closer to or further away from the branch pipe through the transmission component, so as to adjust the water output of the water distribution pipe and improve its practicality.

[0011] In a preferred embodiment of this utility model, the transmission assembly includes a cam, a linkage rod, a vertical rod, a horizontal rod, a slide groove, and a connecting rod. One end of the cam is fixedly connected to an adjusting rod, and the other end of the cam is fixedly connected to the linkage rod. The vertical rod and the horizontal rod are vertically fixedly connected. The horizontal rod is slidably connected to the side wall of the housing. The slide groove is formed on the vertical rod, and the linkage rod is slidably connected in the slide groove. One end of the connecting rod is connected to the horizontal rod, and the other end of the connecting rod is connected to an adjusting plate. The displacement direction of the horizontal rod is parallel to the displacement direction of the adjusting plate.

[0012] To achieve the above technical solution, the adjusting rod is rotated, the cam rotates along the axis of the adjusting rod, and the linkage rod moves along the inner wall of the slide groove. At the same time, the linkage rod abuts against the inner wall of the slide groove and pushes the crossbar to move along the length direction of the crossbar. The crossbar drives the adjusting plate to move through the connecting rod, so that the adjusting plate moves along its own length direction. The operation is simple.

[0013] As a preferred embodiment of this utility model, a handle is fixedly connected to the end of the adjusting rod away from the cam, and the handle is located outside the housing.

[0014] To achieve the above technical solution, a force is applied to the handle so that the handle drives the adjusting rod to rotate, thereby facilitating the rotation of the adjusting rod.

[0015] In a preferred embodiment of this utility model, the crossbar is connected to a scraper via a telescopic rod. The scraper is used to abut against the side wall of the heat sink box, and both ends of the scraper are provided with guide slopes for abutting against the heat sink box.

[0016] To achieve the above technical solution, as the crossbar moves along its length, the scraper moves synchronously with the crossbar. The scraper removes dirt from the outer wall of the heat sink box to improve its heat dissipation. Through the extension and retraction of the telescopic rod, the scraper exerts greater pressure on the heat sink box, making the scraper remove dirt more thoroughly.

[0017] As a preferred embodiment of this utility model, the telescopic rod includes an elastic element, an inner rod, and a sleeve. The sleeve is fixed to the crossbar and extends towards the heat sink box. The inner rod passes through the sleeve and is slidably connected to the sleeve. The inner rod is connected to the scraper. The elastic element is located inside the sleeve and one end is connected to the inner wall of the sleeve. The other end of the elastic element is connected to the inner rod.

[0018] To achieve the above technical solution, pressure is applied to the inner rod by an elastic element, the inner rod applies pressure to the scraper, and the scraper applies pressure to the outer wall of the heat sink box, so that the dirt on the outer wall of the heat sink box can be scraped off. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0020] Figure 2 To illustrate the structure of the water inlet pipe;

[0021] Figure 3 This is a schematic diagram showing the location of the power motor;

[0022] Figure 4 A schematic diagram illustrating the connection structure of the branch pipes in the shell;

[0023] Figure 5 To illustrate the structure of the wire hole;

[0024] Figure 6 This is a schematic diagram illustrating the position of the adjustment plate;

[0025] Figure 7 To illustrate the structural diagram of the conductive component;

[0026] Figure 8 A schematic diagram illustrating the structure of the telescopic pole.

[0027] Reference numerals: 1. Pump casing; 11. Inlet pipe; 12. Outlet pipe; 13. Power motor; 2. Frequency converter; 21. Housing; 23. Heat sink; 24. Wire hole; 25. Sealing block; 3. Branch pipe; 31. Divider hole; 4. Adjusting rod; 5. Transmission assembly; 51. Cam; 52. Linkage rod; 53. Vertical rod; 54. Horizontal rod; 55. Slide groove; 56. Connecting rod; 6. Adjusting plate; 7. Handle; 8. Telescopic rod; 81. Elastic element; 82. Inner rod; 83. Sleeve; 9. Scraper; 91. Guide slope; 100. Wire. Detailed Implementation

[0028] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so that the technical solution of this utility model can be more easily understood and mastered.

[0029] A high-reliability variable frequency water pump includes a pump casing 1, with an inlet pipe 11 and an outlet pipe 12 fixed and connected to the pump casing 1. The inlet pipe 11 and the outlet pipe 12 are horizontally arranged. A power motor 13 is fixedly connected to the pump casing 1, located between the inlet pipe 11 and the outlet pipe 12. A centrifugal impeller driven by the power motor 13 is rotatably connected inside the pump casing 1. The centrifugal impeller rotates and draws water from the inlet pipe 11 into the pump casing 1 and then discharges it from the outlet pipe 12. This is existing technology.

[0030] A frequency converter 2 is fixedly connected to the side wall of the pump casing 1. The frequency converter 2 includes a housing 21, a controller, and a heat sink 23. The housing 21 is fixed to the outer wall of the pump casing 1, and the controller is fixed inside the heat sink 23. The heat generated by the controller is transferred to the heat sink 23. Both the heat sink 23 and the housing 21 are made of stainless steel, which is not easily corroded by water and has a long service life. The heat sink 23 is fixed to the inner wall of the housing 21 near the pump casing 1. A heat dissipation area is formed between the heat sink 23 and the housing 21.

[0031] A branch pipe 3 is fixed to the water outlet pipe 12. The upper end of the branch pipe 3 is connected to the heat dissipation area, and the lower end of the branch pipe 3 is connected to the water outlet pipe 12. Wire holes 24 are provided on both the heat dissipation box 23 and the shell 21.

[0032] An external wire 100 is passed through the wire hole 24 through the housing 21 and the heat sink 23, and then electrically connected to the controller. Another wire 100 is then connected at one end to the controller, and at the other end, passed through the heat sink 23, the housing 21, and the pump housing 1, and then electrically connected to the power motor 13. The wire hole 24 is sealed with AB glue, and after the AB glue solidifies, a sealing block 25 is formed. The housing 21 can be opened from the top.

[0033] A water distribution hole 31 is provided on the side wall of the housing 21, which is connected to the heat dissipation area. A plunger or water distribution pipe is connected to the water distribution hole 31.

[0034] A horizontally arranged adjusting rod 4 is rotatably connected to the side wall of the housing 21. An adjusting plate 6 is slidably connected to the side of the housing 21 near the branch pipe 3. The adjusting rod 4 rotates and moves the adjusting plate 6 closer to or further away from the branch pipe 3 through the transmission component 5 to adjust the water output of the branch pipe 3.

[0035] The transmission assembly 5 includes a cam 51, a linkage rod 52, a vertical rod 53, a horizontal rod 54, a slide groove 55, and a connecting rod 56. One end of the cam 51 is vertically and fixedly connected to the adjusting rod 4, and the other end of the cam 51 is vertically and fixedly connected to the linkage rod 52. The vertical rod 53 is vertically and fixedly connected to the horizontal rod 54, and the horizontal rod 54 is slidably connected to the side wall of the housing 21. The slide groove 55 is formed on the vertical rod 53, and the linkage rod 52 is slidably connected in the slide groove 55.

[0036] One end of the connecting rod 56 is connected to the crossbar 54, and the other end of the connecting rod 56 is connected to the adjusting plate 6. The displacement direction of the crossbar 54 is parallel to the displacement direction of the adjusting plate 6.

[0037] When the adjusting rod 4 rotates, the cam 51 rotates along the axis of the adjusting rod 4. At the same time, the linkage rod 52 moves along the length of the slide groove 55, causing the linkage rod 52 to abut against the inner wall of the slide groove 55 and push the vertical rod 53 to move, causing the horizontal rod 54 to move along its own length. Through the connecting rod 56, the adjusting plate 6 moves synchronously, so that the adjusting plate 6 moves closer to or further away from the branch pipe 3, causing the branch pipe 3 to block or partially block the branch pipe 3 or separate from the branch pipe 3.

[0038] To prevent the adjusting rod 4 from rotating uncontrollably, damping grease is applied between the adjusting rod 4 and the housing 21. An O-ring is placed between the adjusting rod 4 and the housing 21 to improve sealing.

[0039] A handle 7 is fixedly connected to the end of the adjusting rod 4 away from the cam 51, and the handle 7 is located outside the housing 21.

[0040] The crossbar 54 is connected to a scraper 9 via a telescopic rod 8. The scraper 9 is used to abut against the side wall of the heat sink 23. Both ends of the scraper 9 are provided with guide slopes 91 for abutting against the heat sink 23.

[0041] The telescopic rod 8 includes an elastic element 81, an inner rod 82, and a sleeve 83. The sleeve 83 is fixed to the crossbar 54 and extends towards the heat sink 23; the sleeve 83 is a square tube. The inner rod 82 is rectangular and passes through the sleeve 83, slidably connected to it. One end of the inner rod 82 away from the crossbar 54 is fixedly connected to the scraper 9. The elastic element 81 is located inside the sleeve 83, with one end connected to the inner wall of the sleeve 83, and the other end connected to the inner rod 82. The elastic element 81 is a spring.

[0042] By rotating the adjusting rod 4 with the handle 7, the adjusting plate 6 moves, and the crossbar 54 drives the sleeve 83 to move. The sleeve 83 drives the inner rod 82 to move. The guide slope 91 on the scraper 9 abuts against the edge of the side wall of the heat sink 23. Through the guiding action of the guide slope 91, the scraper 9 corresponds to the heat sink 23. As the crossbar 54 continues to move, the scraper 9 moves along the side wall of the heat sink 23 to scrape off the dirt on the heat sink 23. Through the elastic force of the elastic element 81, the scraper 9 applies pressure to the heat sink 23 to improve the cleaning ability, thereby improving the reliability of long-term operation.

[0043] Of course, the above are just typical examples of this utility model. In addition, this utility model may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed by this utility model.

Claims

1. A high-reliability variable frequency water pump, comprising a pump casing (1), wherein an inlet pipe (11) and an outlet pipe (12) are fixedly connected and connected to the pump casing (1), a power motor (13) is fixedly connected to the pump casing (1), the power motor (13) is located between the inlet pipe (11) and the outlet pipe (12), a centrifugal impeller driven by the power motor (13) is rotatably connected inside the pump casing (1), the centrifugal impeller rotates and draws water from the inlet pipe (11) into the pump casing (1) and then discharges it from the outlet pipe (12), a variable frequency controller (2) is fixedly connected to the side wall of the pump casing (1), the variable frequency controller (2) is electrically connected to the power motor (13), characterized in that: The variable frequency controller (2) includes a housing (21), a controller, and a heat sink (23). The housing (21) is fixed to the side wall of the pump housing (1). The controller is fixed inside the heat sink (23). The heat sink (23) is located inside the housing (21). A heat dissipation area is formed between the heat sink (23) and the housing (21). A branch pipe (3) communicating with the heat dissipation area is fixed on the water outlet pipe (12). A wire hole (24) is opened on both the heat sink (23) and the housing (21). A sealing block (25) is fixedly connected to the wire hole (24).

2. The high-reliability variable frequency water pump according to claim 1, characterized in that: The side wall of the housing (21) is provided with a water distribution hole (31), which is connected to the heat dissipation area. A plunger or water distribution pipe is connected to the water distribution hole (31).

3. A high-reliability variable frequency water pump according to claim 2, characterized in that: An adjusting rod (4) is rotatably connected to the side wall of the housing (21), and an adjusting plate (6) is slidably connected to the side of the housing (21) near the branch pipe (3). The adjusting rod (4) rotates and moves the adjusting plate (6) closer to or further away from the branch pipe (3) through the transmission component (5).

4. A high-reliability variable frequency water pump according to claim 3, characterized in that: The transmission component (5) includes a cam (51), a linkage rod (52), a vertical rod (53), a horizontal rod (54), a slide groove (55), and a connecting rod (56). One end of the cam (51) is fixedly connected to the adjusting rod (4), and the other end of the cam (51) is fixedly connected to the linkage rod (52). The vertical rod (53) is vertically fixedly connected to the horizontal rod (54). The horizontal rod (54) is slidably connected to the side wall of the housing (21). The slide groove (55) is opened on the vertical rod (53). The linkage rod (52) is slidably connected in the slide groove (55). One end of the connecting rod (56) is connected to the horizontal rod (54), and the other end of the connecting rod (56) is connected to the adjusting plate (6). The displacement direction of the horizontal rod (54) is parallel to the displacement direction of the adjusting plate (6).

5. A high-reliability variable frequency water pump according to claim 3, characterized in that: The end of the adjusting rod (4) away from the cam (51) is fixedly connected to a handle (7), which is located outside the housing (21).

6. A high-reliability variable frequency water pump according to claim 4, characterized in that: The crossbar (54) is connected to a scraper (9) via a telescopic rod (8). The scraper (9) is used to abut against the side wall of the heat sink (23). Both ends of the scraper (9) are provided with guide slopes (91) for abutting against the heat sink (23).

7. A high-reliability variable frequency water pump according to claim 6, characterized in that: The telescopic rod (8) includes an elastic element (81), an inner rod (82), and a sleeve (83). The sleeve (83) is fixed on the crossbar (54) and extends towards the heat sink box (23). The inner rod (82) passes through the sleeve (83) and is slidably connected to the sleeve (83). The inner rod (82) is connected to the scraper (9). The elastic element (81) is located inside the sleeve (83) and one end is connected to the inner wall of the sleeve (83). The other end of the elastic element (81) is connected to the inner rod (82).

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