Pressurizing structure of pre-filter

Abstract

The utility model provides a pressurizing structure of a pre-filter, and belongs to the technical field of filtering devices. The technical problems of poor sealing performance, poor pressurizing effect and the like in the prior art are solved. The pressurization structure of the prefilter comprises a pressurization cavity which is arranged in a connector and located between a purified water inlet and a water outlet, an impeller is arranged in the pressurization cavity, a brushless motor is arranged above the impeller, a rotor of the brushless motor is connected with the impeller, and the lower end of the rotor is arranged on an anti-falling seat capable of preventing the rotor from falling. The water purifier has the advantages that leakage is not prone to occurring, purified water can be output in a large-flow mode, and the stronger pressurization effect can be achieved.

Description

Technical Field

[0001] This utility model belongs to the technical field of filtration devices, and relates to pre-filter devices, and in particular to a pressurization structure for a pre-filter. Background Technology

[0002] A pre-filter, also known as a pre-water purifier, is primarily used to filter impurities from water. Pre-filters typically have a "T" shaped structure, with the inlet and outlet at the left and right ends of the top horizontal section, the main body and internal cylindrical filter screen at the bottom vertical section, and the drain outlet at the very bottom. Because pre-filters work by intercepting large particles of impurities in the water through their internal filter screen, they can cause a drop in water pressure while filtering the water, resulting in a poor user experience. To address this, researchers have conducted extensive research and proposed various solutions.

[0003] For example, Chinese patent literature discloses an integrated filter and booster water pump [application number: CN202110031405.1], including a top cover, a DC brushless water pump, a pressure cover, a dust cover, a polymer explosion-proof filter bottle, a filter screen frame, a filter screen mounted on the filter frame, a filter screen cover, an ultraviolet lamp, an anti-slip cover, connecting pipes, and a shut-off valve. The impeller of the brushless DC water pump extends into the impeller cavity, and the dust cover and pressure cover are fastened together. The ultraviolet lamp is located inside the filter frame, and the lower end of the filter frame is fixed to the filter screen cover. The interface of the filter frame is connected to the frame seat of the pressure cover. The connecting pipe is fixed to the mounting hole of the anti-slip cover, and the shut-off valve is connected to the connecting pipe. The internal threaded connecting sleeve of the polymer explosion-proof filter bottle is screwed into the external threaded interface of the pressure cover, and the shoulder supports the filter screen cover. The filter screen cover and the polymer explosion-proof filter bottle between two adjacent ribs form a water channel. The radial support frame is attached to the inner wall of the polymer explosion-proof filter bottle. This utility model uses a DC brushless water pump, which is not limited by the water pressure in the pipeline and can be used in any situation. It can also disinfect and sterilize water.

[0004] While the above solution provides a pressurization effect, the overall pressurization structure is unstable and prone to failure. Furthermore, it lacks a sealing structure, resulting in poor sealing. Finally, the pressurization chamber volume is small, making it difficult to achieve high flow rates. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a pressure boosting structure for a pre-filter with better pressure boosting effect.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A pressurization structure for a pre-filter includes a pressurization chamber disposed within a connector and located between the purified water inlet and the water outlet. An impeller is disposed within the pressurization chamber, and a brushless motor is disposed above the impeller. The rotor of the brushless motor is connected to the impeller, and the lower end of the rotor is disposed on an anti-fall seat that can prevent the rotor from falling.

[0007] The impeller is driven by the rotor of the brushless motor to rotate, which increases the pressure of the purified water in the pressurization chamber and outputs it from the outlet. The impeller is connected to the brushless motor through the rotor, which has a stronger connection strength, which is conducive to outputting greater water pressure, and also has the effects of more stable water pressure output and longer equipment service life.

[0008] In the aforementioned pressurization structure of the pre-filter, the anti-fall seat includes N circumferentially distributed support columns arranged on the purified water inlet, where N ≥ 1. The lower end of each support column is connected to a connector, and the upper end abuts against the lower end of the rotor. By setting N circumferentially distributed support columns on the purified water inlet, the rotor can be effectively supported, enhancing the stability of the entire pressurization structure when the rotor rotates at high speed.

[0009] In the aforementioned pre-filter pressurization structure, there are three L-shaped support columns. The upper ends of the three support columns converge to form a support base, and a water inlet channel is formed between each adjacent support column and the support base. The water inlet channel formed between adjacent support columns and the support base can guide water flow more smoothly into the pressurization chamber, reduce water flow resistance, and improve pressurization efficiency.

[0010] In the aforementioned pre-filter pressurization structure, the brushless motor includes a motor housing with a stator cavity containing the stator. The rotor is housed within the rotor cavity, and the rotor cavity is sealed and isolated from the stator cavity by an isolation cylinder that is open at one end and closed at the other. The rotor cavity communicates with the pressurization chamber through the opening. Brushless motors are inherently characterized by low noise and smooth operation. Through reasonable structural design, motor noise and vibration can be further reduced, improving the overall performance of the equipment and the user experience.

[0011] In the aforementioned pre-filter pressurization structure, the rotor includes a central shaft. A circumferential positioning structure is provided between the central shaft and the isolation cylinder and / or connector to prevent the central shaft from rotating. A stator frame, capable of rotating around the central shaft, is fitted onto the central shaft. The stator frame is connected to the impeller, and the lower end of the central shaft is mounted on the anti-fall seat. By providing a circumferential positioning structure between the central shaft and the isolation cylinder and / or connector, the rotation of the central shaft can be effectively prevented. This design ensures the stability of the rotor during high-speed rotation, reduces vibration and noise caused by rotation, and improves the overall pressurization performance of the motor.

[0012] In the pressurization structure of the pre-filter described above, the circumferential positioning structure includes an upper positioning hole provided on the closed end of the isolation cylinder, and the upper end of the central shaft is provided in the upper positioning hole and is circumferentially limited thereto.

[0013] And / or, the fall arrestor is provided with a lower positioning hole, and the lower end of the central shaft is disposed in the lower positioning hole and is circumferentially limited thereto.

[0014] The central shaft is installed at its upper and lower ends in the upper positioning hole of the isolation cylinder and the lower positioning hole of the fall arrestor, respectively. The upper positioning hole is formed by extending outward along the central shaft axis from the inner wall of the top of the isolation cylinder, while the lower positioning hole is formed by the inward recess of the fall arrestor along the central shaft axis at its center. Through circumferential limiting, the central shaft is less prone to deformation or damage under external forces, thus extending the service life of the pressurization structure. Furthermore, this dual limiting design makes the entire pressurization structure more stable and less prone to shaking or displacement.

[0015] In the pressurization structure of the pre-filter described above, a wear-resistant sleeve is provided between the stator frame and the central shaft. The wear-resistant sleeve is circumferentially limited and connected to the stator frame. A positioning ring or bearing sleeved on the central shaft is provided between the wear-resistant sleeve and the anti-fall seat.

[0016] A flat key for axial positioning is provided between the wear-resistant sleeve and the stator frame. The flat key is respectively located in the keyway of both the wear-resistant sleeve and the stator frame. The wear-resistant sleeve is made of wear-resistant ceramic material, capable of withstanding wear during high-speed friction and protecting the corresponding parts from damage. The presence of a wear-resistant sleeve between the stator frame and the central shaft effectively reduces wear caused by friction and extends the service life of the equipment.

[0017] In the aforementioned pre-filter pressurization structure, the top of the connector has an opening communicating with the pressurization chamber. A motor housing is mounted on this opening, and the motor housing is sealed to the connector and is detachable. This detachable connection between the motor housing and the connector facilitates motor maintenance and reduces repair costs.

[0018] In the aforementioned pressurization structure of the pre-filter, the motor housing has a sealing ring groove at one end of the impeller, and a sealing ring is installed within the sealing ring groove. An L-shaped sealing protrusion is provided on the opening, allowing it to enter the sealing ring groove and abut against the sealing ring. The motor housing and the connector are fixed together with four bolts. The sealing ring within the sealing ring groove effectively prevents leakage, ensuring the normal operation of the system. Furthermore, the L-shaped sealing protrusion tightly abuts against the sealing ring, further enhancing the sealing effect.

[0019] In the aforementioned pressurization structure of the pre-filter, the impeller is a centrifugal impeller. The impeller's suction end is located on the purified water inlet, and the discharge end mates with the outlet when the impeller rotates. Utilizing the centrifugal force generated by the impeller's rotation, purified water is pushed towards the outlet. This operating method is stable and reliable, and not easily affected by external factors.

[0020] Compared with existing technologies, the advantages of this pre-filter's tool storage structure are: 1. It has a sealed structure design, making it less prone to leakage. 2. The pressurization chamber has a large volume, allowing for a high flow rate of purified water. 3. The impeller connection structure is reliable, enabling a stronger pressurization effect. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram provided by this utility model.

[0022] Figure 2 This is a cross-sectional structural diagram provided by this utility model.

[0023] Figure 3 This is a schematic diagram of the installation structure provided by this utility model.

[0024] In the diagram, the components are: connector 1, water inlet 11, water outlet 12, anti-fall seat 13, support column 131, support seat 132, opening 14, L-shaped sealing ring 141, pressurization chamber 2, impeller 21, brushless motor 3, rotor 31, central shaft 311, positioning ring 312, motor housing 32, sealing ring groove 321, sealing ring 322, stator cavity 33, rotor cavity 34, isolation cylinder 35, circumferential positioning structure 36, upper positioning hole 361, lower positioning hole 362, stator frame 37, flat keyway 371, wear-resistant sleeve 38, and flat key 381. Detailed Implementation

[0025] like Figures 1 to 3 As shown, the pressurization structure of this pre-filter includes a pressurization chamber 2 disposed in the connector 1 and located between the water inlet 11 and the outlet 12. An impeller 21 is disposed in the pressurization chamber 2, and a brushless motor 3 is disposed above the impeller 21. The rotor 31 of the brushless motor 3 is connected to the impeller 21, and the lower end of the rotor 31 is disposed on a fall arrestor 13 that can prevent the rotor 31 from falling.

[0026] In this embodiment, the rotor 31 of the brushless motor 3 is connected to the impeller 21, driving the impeller 21 to rotate at high speed in the pressurization chamber 2. The shape design of the impeller 21 itself drives the purified water in the pressurization chamber 2 to flow into the outlet 12, achieving a pressurization effect. The anti-fall seat 13 ensures the stable operation of the impeller 21, thereby ensuring a smooth pressurization effect.

[0027] More specifically, the anti-fall seat 13 includes three circumferentially distributed support columns 131 installed on the water inlet 11. The lower end of the support column 131 is connected to the connector 1, and the upper end abuts against the lower end of the rotor 31.

[0028] More specifically, there are three support columns 131 in an L-shape. The upper ends of the three support columns 131 converge to form a support base 132. A water inlet channel 11 is formed between each of the two adjacent support columns 131 and the support base 132.

[0029] In this embodiment, the upper ends of three L-shaped support columns 131 converge to form a support base 132, so that the support force of the support base 132 on the central axis 311 is maintained in the axial direction of the central axis 311. While ensuring uniform stress, it does not affect the water intake efficiency of the water inlet 11, and has the effect of assisting in the high-speed and stable operation of the brushless motor 3.

[0030] More specifically, the brushless motor 3 includes a motor housing 32, a stator cavity 33 for setting the stator is provided in the motor housing 32, and a rotor 31 is set in a rotor cavity 34. The rotor cavity 34 and the stator cavity 33 are sealed and isolated by an isolation cylinder 35 with one end open and the other end closed. The rotor cavity 34 is connected to the booster cavity 2 through the opening.

[0031] More specifically, the rotor 31 includes a central shaft 311. A circumferential positioning structure 36 is provided between the central shaft 311, the isolation cylinder 35, and the connector 1 to prevent the central shaft 311 from rotating. A stator frame 37 that can rotate around the central shaft 311 is provided on the central shaft 311. The stator frame 37 is connected to the impeller 21. The lower end of the central shaft 311 is provided on the anti-fall seat 13.

[0032] More specifically, the circumferential positioning structure 36 includes an upper positioning hole 361 provided on the closed end of the isolation cylinder 35, and the upper end of the central shaft 311 is provided in the upper positioning hole 361 and is circumferentially limited thereto;

[0033] The fall arrestor 13 is provided with a lower positioning hole 362, and the lower end of the central shaft 311 is set in the lower positioning hole 362 and is circumferentially limited therewith.

[0034] In this embodiment, both the upper positioning hole 361 and the lower positioning hole 362 are provided with limiting keyways, and each of the corresponding positions on the central shaft 311 is provided with a limiting key that matches the shape of the limiting keyway. The torque is borne by the tight fit between the limiting keyway and the limiting key, thereby ensuring circumferential limiting.

[0035] More specifically, a wear-resistant sleeve 38 is provided between the stator frame 37 and the central shaft 311. The wear-resistant sleeve 38 is circumferentially limited and connected to the stator frame 37. A positioning ring 312 or bearing is provided between the wear-resistant sleeve 38 and the anti-fall seat 13 and is sleeved on the central shaft 311.

[0036] In this embodiment, a flat key 381 for axial positioning is provided between the wear-resistant sleeve 38 and the stator frame 37. The flat key 381 is respectively disposed in the flat keyway 371 of the wear-resistant sleeve 38 and the stator frame 37. The flat key 381 disposed in the flat keyway 371 of the wear-resistant sleeve 38 and the stator frame 37 serves as an axial positioning function, which can effectively prevent the wear-resistant sleeve 38 from moving in the axial direction and ensure the stability of the relative position between the stator frame 37 and the central shaft 311.

[0037] More specifically, the top of the connector 1 is provided with an opening 14 that communicates with the pressurization chamber 2. The opening 14 is provided with a motor housing 32, which is sealed to the connector 1 and is detachable.

[0038] More specifically, the motor housing 32 is provided with a sealing ring groove 321 at one end of the impeller 21, and a sealing ring 322 is provided in the sealing ring groove 321. The opening 14 is provided with an L-shaped sealing protrusion 141 that can enter the sealing ring groove 321 and abut against the sealing ring 322. The motor housing 32 and the connector 1 are fixed by four bolts.

[0039] More specifically, the impeller 21 is a centrifugal impeller, with the water intake end of the impeller 21 located on the clean water inlet 11, and the water outlet end of the impeller 21 being able to cooperate with the water outlet 12 when the impeller 21 rotates.

[0040] The working principle of this embodiment is that water enters the filter device from the inlet of the pre-filter, and after filtration is completed at the filter device, the purified water enters the pressurization chamber 2 from the purified water inlet 11.

[0041] A brushless motor 3 is installed in the pressurization chamber 2. The rotor 31 of the brushless motor 3 is connected to the impeller 21, driving the impeller 21 to rotate at high speed in the pressurization chamber 2. The shape design of the impeller 21 itself drives the purified water in the pressurization chamber 2 to rotate. The outlet 12 is set in the tangential direction of the purified water rotation. Due to the movement of the purified water, the pressure in the pressurization chamber 2 increases, and the purified water naturally flows into the outlet 12 located in the tangential direction, thus achieving the pressurization effect.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0043] Although this document uses numerous terms such as connector, water inlet, outlet, anti-fall seat, support column, support base, opening, L-shaped sealing ring, booster chamber, impeller, brushless motor, rotor, central shaft, positioning ring, motor housing, sealing ring groove, sealing ring, stator cavity, rotor cavity, isolation cylinder, circumferential positioning structure, upper positioning hole, lower positioning hole, stator frame, flat keyway, wear-resistant sleeve, and flat key, the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A booster structure of a pre-filter, comprising a booster cavity (2) arranged in a joint (1) and located between a clean water inlet (11) and a water outlet (12), characterized in that, The booster chamber (2) is internally provided with an impeller (21), the upper portion of the impeller (21) is provided with a brushless motor (3), the rotor (31) of the brushless motor (3) is connected with the impeller (21), and the lower end of the rotor (31) is arranged on an anti-falling seat (13) capable of preventing the rotor (31) from falling.

2. The booster structure of a prefilter according to claim 1, characterized by, The anti-falling seat (13) comprises N support columns (131) arranged on the water inlet (11) and distributed in the circumferential direction, and N is greater than or equal to 1, the lower end of the support column (131) is connected with the joint (1), and the upper end abuts against the lower end of the rotor (31).

3. The pre-filtered plenum structure of claim 2, wherein, The support column (131) has three L-shaped support columns (131), the upper ends of the three support columns (131) converge to form a support seat (132), and a water inlet flow channel (11) is formed between each two adjacent support columns (131) and the support seat (132).

4. The booster structure of a prefilter according to claim 1, wherein The brushless motor (3) comprises a motor shell (32), a stator cavity (33) provided with a stator is arranged in the motor shell (32), the rotor (31) is arranged in a rotor cavity (34), the rotor cavity (34) and the stator cavity (33) are sealed and isolated by an isolation cylinder (35) with one end being open and the other end being closed, and the rotor cavity (34) is in communication with the booster chamber (2) through the opening.

5. The booster structure of a prefilter according to claim 4, characterized by, The rotor (31) comprises a central shaft (311), a circumferential positioning structure (36) capable of preventing the central shaft (311) from rotating is arranged between the central shaft (311) and the isolation cylinder (35) and / or the joint (1), a stator holder (37) capable of rotating around the central shaft (311) is arranged on the central shaft (311), the stator holder (37) is connected with the impeller (21), and the lower end of the central shaft (311) is arranged on the anti-falling seat (13).

6. The prefilter plenum structure of claim 5, wherein, The circumferential positioning structure (36) comprises an upper positioning hole (361) arranged on the closed end of the isolation cylinder (35), and the upper end of the central shaft (311) is arranged in the upper positioning hole (361) and is circumferentially limited thereby. Furthermore, the anti-falling seat (13) is provided with a lower positioning hole (362), and the lower end of the central shaft (311) is arranged in the lower positioning hole (362) and is circumferentially limited thereby.

7. The booster structure of a prefilter according to claim 5, wherein The stator holder (37) and the central shaft (311) are provided with a wear-resistant sleeve (38), the wear-resistant sleeve (38) is connected with the stator holder (37) and is circumferentially limited, and the wear-resistant sleeve (38) and the anti-falling seat (13) are provided with a positioning ring (312) or a bearing arranged on the central shaft (311).

8. The booster structure of a prefilter according to claim 4, wherein The top of the joint (1) is provided with an opening (14) in communication with the booster chamber (2), the motor shell (32) is arranged on the opening (14), and the motor shell (32) is sealingly and detachably connected with the joint (1).

9. The booster structure of a prefilter according to claim 8, characterized by, The motor housing (32) is provided with a sealing ring groove (321) on one end of the impeller (21), the sealing ring groove (321) is provided with a sealing ring (322), the open end (14) is provided with an L-shaped sealing convex ring (141) capable of entering the sealing ring groove (321) and abutting against the sealing ring (322), and the motor housing (32) is fixed with the joint (1) through four bolts.

10. The prefilter plenum structure of any of claims 1-9, wherein, The impeller (21) is a centrifugal impeller, the water suction end of the impeller (21) is arranged on the water inlet (11), and the water outlet end can be matched with the water outlet (12) when the impeller (21) rotates.

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