Pump body assembly with filtering structure

Abstract

The invention relates to the technical field of pumps, and provides a pump body assembly with a filtering structure, which comprises a pump body, a water inlet and a water outlet which are axially arranged in parallel are arranged on the pump body, a flow channel communicated with the water inlet and the water outlet is arranged in the pump body, a filtering assembly and a check valve are arranged in the flow channel, and the filtering assembly is detachably connected with the pump body. Fluid enters from the water inlet and sequentially flows through the filtering assembly, the check valve, the impeller cavity of the pump body and the water outlet.

Description

Technical Field

[0001] This invention belongs to the field of pump technology, and particularly relates to a pump body assembly with a filter structure. Background Technology

[0002] Current household water pump technology is developing towards higher efficiency, energy saving, integration, intelligence, and quieter operation. Permanent magnet technology, with its advantages of high efficiency, low energy consumption, and long lifespan, has become the core technology supporting the next generation of water pumps. Meanwhile, the integration of filtration and pressurization functions has become a basic requirement for household pumps, especially those involved in drinking water treatment. This necessitates that water pumps efficiently complete water pretreatment within a limited space to ensure the stable operation of subsequent water-using equipment and the quality of the output water.

[0003] Currently, to achieve the integration of pressurization and filtration functions, the pump body structure of household pumps is mainly divided into two categories. The first category is the shaft-in-shaft structure (inlet and outlet directions are parallel). This structure, such as the high-performance, high-efficiency self-priming device disclosed in patent CN221322731 U, includes a shell with a water chamber, a suction assembly inside the water chamber, a suction port and a suction spring on the suction assembly, and a drive device inside the shell to drive the suction assembly. The drive device contains an impeller and a guide fluid with a guide groove and a pressure-binding port. The inlet and outlet on the shell are connected to the suction assembly and a check valve device with an air tank, respectively. A check valve is also provided near the inlet of the suction assembly. The piping layout of this type of structure is simple and compact, but it generally does not have a pre-filtration function.

[0004] After the water enters through the inlet, it needs to pass through the check valve, suction assembly, drive device, water chamber and check valve device in sequence before being discharged from the outlet. The entire flow channel has no filtration and interception structure, so it is impossible to effectively pre-treat the incoming water and it is difficult to intercept particulate impurities in the water.

[0005] If users require clean water, they often need to add an extra filter to the external pipeline. This not only increases the complexity and cost of installation, but may also affect the original self-priming efficiency and pressurization performance of the water pump, and at the same time, it will affect the user experience.

[0006] The second type is the shaft-in, vertical-out structure (inlet and outlet directions are perpendicular), such as the water-cooled filter assembly for the motor of the canned motor disclosed in patent CN 223206968U, and the canned motor pump disclosed in patent CN 120384895B. This structural design can integrate a filter structure (such as a filter screen or filter device) inside the pump body to intercept impurities and protect the motor or cooling branch, but it has drawbacks. Specifically, in patent CN 223206968U, the filter screen is mounted on the guide sleeve of the pump cavity through an integrated filter screen bracket. Its sealing relies on the overall assembly seal between the pump body and the motor end cover and the guide sleeve. There is no independent sealing structure specifically for the filter component, and maintenance requires disassembling the pump body, motor, and self-priming pump head. Water leakage is easy during disassembly, and the risk of seal failure is high after reassembly. In patent CN120384895B, a filter device is installed at the connection between the cooling pipe and the liquid outlet pipe. The sealing method is a pressure plate pressing method. The sealing reliability is greatly affected by the assembly tightening force. During maintenance, the pipe sealing connection needs to be disassembled, which also has the problem of water leakage.

[0007] The common problem with the aforementioned structures is that the vertical layout of the inlet and outlet results in a large overall size and a large installation space. Furthermore, due to the limitation of the maintenance direction of the filter components, they are difficult to adapt to narrow spaces such as cabinets and pipe shafts, or to pipe layouts that require axial water inlet and outlet.

[0008] Therefore, there is an urgent need for a pump body assembly with a filter structure that can combine the spatial advantages of shaft-in and shaft-out structure, high-efficiency filtration function, convenient maintenance and reliable sealing. Summary of the Invention

[0009] To address the shortcomings of existing technologies, the present invention aims to provide a pump assembly with a filter structure, which solves the problems of current shaft-inlet and shaft-outlet household pumps lacking pre-filtration function, the high cost and performance impact of adding an additional filter structure, and the inability to disassemble and clean existing pumps with shaft-inlet and shaft-outlet and filter structures, as well as high resistance.

[0010] To achieve this objective, the present invention adopts the following technical solution: A pump body assembly with a filter structure includes a pump body, on which an inlet and an outlet are arranged axially parallel. The pump body has a flow channel inside that connects the inlet and the outlet. A filter assembly and a check valve are arranged in the flow channel. The filter assembly and the pump body are detachably connected. Fluid enters through the inlet and flows sequentially through the filter assembly, the check valve, the impeller cavity of the pump body, and the outlet.

[0011] Preferably, a sealing structure is provided between the filter assembly and the pump body. The sealing structure can prevent the high-pressure water in the flow channel from flowing back and prevent the water entering through the inlet from entering the outlet without passing through the filter assembly.

[0012] Preferably, the flow channel and the filter assembly are threaded together.

[0013] Preferably, the inlet and the impeller cavity form a first flow channel, and a maintenance channel is provided on the pump body, the axis of which coincides with the disassembly direction axis of the filter assembly; And / or, the axis of the maintenance channel is perpendicular to the axis of the first flow channel.

[0014] Preferably, the flow channel connecting the outlet and the impeller cavity includes a second flow channel, the axis of which is parallel to the axis of the first flow channel.

[0015] Preferably, the second flow channel is connected to the maintenance channel, and a maintenance opening is provided on the second flow channel. A sealing member is detachably connected to the maintenance opening, and the sealing member and the maintenance opening are sealed together. The filter assembly can pass through the maintenance opening and be detachably connected to the maintenance channel.

[0016] Preferably, the filter assembly is a cylindrical filter basket; And / or, the filter basket has a filter pore size range of 80-250 mesh, and the filter basket is made of stainless steel, brass or high-strength engineering plastic.

[0017] Preferably, the filter basket is threaded to the maintenance channel.

[0018] Preferably, the check valve is located in the first flow channel. After the fluid enters the filter basket through the inlet, the fluid opens the check valve and enters the impeller cavity.

[0019] Preferably, a receiving groove is provided on the side wall of the first flow channel, the central axis of the receiving groove is coaxial with the central axis of the maintenance channel, and one end of the filter basket is inserted into the receiving groove.

[0020] Compared with the prior art, the present invention has the following beneficial effects: The present invention integrates a filter component in the built-in flow channel of the shaft-inlet and shaft-outlet pump body, with the inlet and outlet arranged in parallel. The pipeline layout is simple, occupies little space, and can be adapted to narrow scenarios such as cabinets and pipe wells. Moreover, no additional external filter is required, which solves the problem of traditional shaft-inlet and shaft-outlet pumps not having a built-in filter structure. The filtration function is integrated into the pump body, reducing the complexity of installation and the cost of use.

[0021] In addition, the fluid first passes through the filter assembly and then flows to the outlet through the check valve. The filter assembly can effectively intercept particulate impurities in the water, preventing impurities from directly entering key components such as the check valve and impeller. This reduces the risk of component wear, jamming, or clogging, which not only improves the safety of the water quality but also extends the overall service life and operational reliability of the pump.

[0022] The aforementioned filter components and pump body adopt a detachable connection design, which makes it convenient for users to clean or replace the filter components regularly, solving the cumbersome problem of disassembling the pump body for maintenance of traditional embedded filter structures.

[0023] Furthermore, the pump body in this embodiment is not limited to a specific motor type or pump body size. It can be used as a general structure to cooperate with various drive forms such as asynchronous motors and shielded motors, thereby producing a series of household pump products to meet the needs of different scenarios such as water heater pressurization, water purifier matching, and water pressure replenishment for high and low buildings, and has a wider range of applications. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the pump body assembly with a filter structure from a first angle in this invention.

[0025] Figure 2 This is a second-angle structural schematic diagram of the pump body assembly with a filter structure in this invention. Figure 3 This is a cross-sectional view of the pump body assembly with a filter structure in this invention; Figure 4 This is a top view of the pump body assembly with a filter structure in this invention; Figure 5 For the present invention Figure 4 A schematic diagram of the AA-direction structure (excluding filter components and sealing components).

[0026] The components are as follows: 1. Pump body; 2. Inlet; 3. Outlet; 4. Filter assembly; 41. Filter basket; 5. Check valve; 6. First flow channel; 7. Receiving tank; 8. Maintenance channel; 9. Second flow channel; 10. Third flow channel; 13. Sealing component; 14. Impeller cavity; 15. Maintenance opening; 16. Second sealing ring; 18. First sealing ring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0029] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0030] In the description of this invention, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0031] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0033] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0034] Existing axial-inlet / axial-outlet household pumps lack built-in pre-filters, generally requiring the installation of external filters. However, this increases installation costs and complexity, and unfiltered impurities can easily lead to wear and jamming of critical pump components, affecting operational stability and water quality safety. Furthermore, installing filters in existing axial-inlet / axial-outlet pump structures presents drawbacks such as the inability to disassemble and clean them, high flow resistance, increased space requirements, and potential for leaks.

[0035] In addition, although the existing shaft-inlet and vertical-outlet pump body integrates the filtration function, the vertical layout of the inlet and outlet results in a large size, occupies a lot of installation space, restricts the installation direction, and requires disassembling the pipeline or pump body for maintenance of the filter components, which is cumbersome to operate and prone to water leakage.

[0036] like Figures 1-5 As shown, this embodiment provides a pump assembly with a filter structure, including a pump body 1. The pump body 1 has an inlet 2 and an outlet 3 arranged axially parallel to each other. The pump body 1 has a flow channel inside that connects the inlet 2 and the outlet 3. A filter assembly 4 and a check valve 5 are arranged in the flow channel. The filter assembly 4 and the pump body 1 are detachably connected. After the fluid enters through the inlet 2, it flows through the filter assembly 4 and the check valve 5 in sequence, and then flows out through the outlet 3. Figure 3 The dashed lines in the diagram indicate the direction of water flow.

[0037] In this embodiment, a filter assembly 4 is integrated into the built-in flow channel of the shaft-inlet and shaft-outlet pump body 1. The inlet 2 and outlet 3 are arranged in parallel, which simplifies the pipeline layout, occupies little space, and can be adapted to narrow scenarios such as cabinets and pipe wells. Moreover, no additional external filter is required, which solves the problem of traditional shaft-inlet and shaft-outlet pumps not having a built-in filter structure. The filtration function is integrated into the pump body 1, reducing the complexity of installation and the cost of use.

[0038] In addition, the fluid first passes through the filter assembly 4 and then flows through the check valve 5 to the outlet 3. The filter assembly 4 can effectively intercept particulate impurities in the water, preventing impurities from directly entering the check valve 5 and key components such as the impeller. This reduces the risk of component wear, jamming, or clogging, which can improve the safety of the water quality and extend the overall service life and operational reliability of the pump body 1.

[0039] The filter assembly 4 and the pump body 1 are designed to be detachable, which makes it convenient for users to clean or replace the filter assembly 4 regularly, thus solving the problem of the cumbersome maintenance of traditional embedded filter structures that require disassembling the pump body 1.

[0040] Furthermore, the pump body 1 in this embodiment is not limited to a specific motor type or pump body 1 size. It can be used as a general structure to cooperate with various drive forms such as asynchronous motors and shielded motors, thereby producing a series of household pump products to meet the needs of different scenarios such as water heater pressurization, water purifier matching, and water pressure replenishment for high and low buildings, and has a wider range of applications.

[0041] Preferably, a sealing structure is provided between the filter assembly 4 and the pump body 1. At the same time, by providing a sealing structure, the high pressure backflow in the flow channel or the unfiltered water short-circuiting into the outlet 3 can be effectively prevented, ensuring the pressurization efficiency and the sensitivity of the self-start and stop function of the pump body 1, and avoiding the defects of leakage backflow due to seal failure in the existing integrated filter structure.

[0042] Preferably, the flow channel and the filter assembly 4 are threaded together to achieve a detachable connection between the two.

[0043] More preferably, the flow channel has an internal thread on the side near the outlet 3, and the filter assembly 4 is a cylindrical filter basket 41. The outer periphery of the filter basket 41 has an external thread that matches the internal thread. The filter basket is detachably connected to the pump body 1 through the threaded engagement. The threaded engagement achieves rigid fixation between the filter basket 41 and the pump body 1 through a helical locking structure. The large contact area and uniform locking force can effectively resist the vibration and water flow impact during the operation of the pump body 1, prevent the filter basket from axial movement or circumferential rotation, and ensure long-term stable operation of the filter assembly 4 under high pressure and high frequency vibration conditions.

[0044] Furthermore, the threaded insertion process allows for precise installation depth, ensuring the filter basket is installed correctly and that the sealing structure fits precisely with the inner wall of the flow channel. This prevents seal failure or uneven flow resistance caused by improper installation and allows for independent maintenance by different user groups. The threaded structure is directly integrated into the outer circumference of the flow channel and the filter basket, eliminating the need for additional locking structures. The axial space occupied is entirely the structural length of the filter basket itself, meeting the compact design requirements of the shaft-in / shaft-out pump body 1 and preventing the flow channel from becoming longer or the pump body 1 from increasing in volume due to the connection structure. Specifically, the filter basket 41 is threadedly connected to the maintenance channel 8.

[0045] More specifically, the inlet 2 and the impeller cavity 14 form a first flow channel 6. A receiving groove 7 is provided on the side wall of the first flow channel 6. The central axis of the receiving groove 7 is coaxial with the central axis of the maintenance channel 8. One end of the filter basket 41 is inserted into the receiving groove 7.

[0046] Specifically, the tail end of the filter basket 41 is inserted into the receiving groove 7, which is used to support the filter basket 41. The water flow impacts the filter basket 41 to prevent the filter basket 41 from being subjected to force for a long time, which could cause deformation of the installation position.

[0047] In other embodiments, an annular magnetic element (such as a neodymium iron boron magnet) is provided at the bottom of the flow channel near the inlet 2, and a matching magnetic accommodating element (such as a ferromagnetic metal ring) is provided at the end of the cylindrical filter basket 41. An axial guide rib is provided on the inner wall of the flow channel, and a matching guide groove is provided on the outer periphery of the filter basket 41. The filter basket 41 is axially inserted into the flow channel through the cooperation of the guide rib and the guide groove, and is axially fixed by the attraction force of the magnetic element and the magnetic accommodating element. During disassembly, an axial pulling force can be applied to overcome the magnetic force and remove the filter basket 41.

[0048] In this embodiment, the magnetic attraction force guides the filter basket to automatically position itself, eliminating the need for deliberate alignment with the guide structure. Initial fixation can be achieved solely through attraction, reducing operational difficulty. Simultaneously, magnetic positioning prevents installation deviations and ensures the coaxiality of the filter basket 41 and the flow channel. Furthermore, there is no rigid friction during the insertion and removal of the filter basket 41, resulting in minimal wear on the mating surfaces of the filter basket 41 and the flow channel. This minimizes the risk of seal failure due to wear, extending the seal's lifespan.

[0049] Preferably, the sealing structure is a first sealing ring 18, which is sleeved on the outer periphery of the end of the filter basket 41 near the outlet 3. The outer side of the first sealing ring 18 is tightly fitted with the inner wall of the flow channel, which can directly block the gap between the filter assembly 4 and the flow channel. This effectively prevents high-pressure water from the impeller side from flowing back to the inlet 2, avoiding a decrease in pressurization efficiency and a reduction in the sensitivity of the self-starting and stopping function. It also prevents unfiltered water from short-circuiting around the filter basket 41 and flowing into the pipe of the outlet 3, ensuring that all water is filtered before entering the subsequent flow channel, thereby guaranteeing the quality of the filtered water. The first sealing ring 18 and the inner wall of the flow channel form a circumferentially fully fitted surface seal with a large contact area and uniform force. Compared with point seals and line seals, it can better adapt to the processing errors of the flow channel and the slight deformation of the pump body 1 during operation. It can still maintain the sealing effect under high pressure and vibration conditions, solving the defects of existing shaft-inlet and vertically outlet pump bodies that do not have a dedicated filter component for sealing and are prone to leakage. Furthermore, the first sealing ring 18 is fitted onto the end of the filter basket and is installed and removed simultaneously with the filter basket 41. This does not obstruct the threaded insertion and removal of the filter basket 41, nor does it require additional removal of the first sealing ring 8. Moreover, the first sealing ring 18 has a simple structure and small size. When replacing it, only the old first sealing ring 18 needs to be removed and the new first sealing ring 18 needs to be fitted, without increasing the user's maintenance difficulty and cost.

[0050] Preferably, the first sealing ring 18 is made of any one of nitrile rubber, fluororubber, or silicone rubber. The first sealing ring 18 can be made of water-resistant, pressure-resistant, and anti-aging materials such as nitrile rubber or fluororubber, depending on the application scenario. It can adapt to different water qualities such as tap water, purified water, and operating pressure. Furthermore, because the filter basket 41 has already intercepted particulate impurities, the surface of the first sealing ring 18 will not be worn or scratched by impurities, significantly extending the service life of the seal and reducing the risk of seal failure.

[0051] Preferably, the check valve 5 is located in the first flow channel 6 that connects the inlet 2 and the impeller cavity 14. After the fluid enters the filter basket 41 through the inlet 2, it opens the check valve 5 and enters the impeller cavity 14.

[0052] Preferably, the check valve 5 is located on the side of the filter assembly 4 near the impeller cavity 14 of the pump body 1. Specifically, the check valve 5 is fixed in the flow channel on the side of the filter assembly 4 near the impeller cavity 14, forcing the water flow to be filtered first and then pass through the check valve 5. The filter assembly 4 has intercepted particulate impurities such as mud, sand, and rust, preventing impurities from directly contacting the valve disc and valve seat of the check valve 5. This solves the problem of opening and closing failure caused by impurities stuck and worn in traditional check valves 5, extending the service life by 2-3 times and significantly improving the overall operational reliability of the pump body 1.

[0053] Specifically, in this embodiment, the check valve 5 is located within the first flow channel 6, eliminating the need for additional check valve mounting seats, connecting pipes, or other structures within the flow channel of the pump body 1. This avoids increasing the volume of the pump body 1 axially and radially, resulting in a compact pump body structure with an axial inlet and outlet configuration. It also prevents the flow channel from becoming longer or the pump body 1 from expanding due to the check valve 5's placement, ensuring a simple pipeline layout. The check valve 5 is located close to the impeller chamber 14 and the high-pressure zone, allowing the valve disc to respond quickly to changes in water pressure. When open, it reduces water flow resistance; when closed, it promptly blocks high-pressure water backflow, preventing pressure boosting efficiency loss due to backflow. Simultaneously, the valve disc moves unimpeded in a clean water environment, further enhancing the opening and closing sensitivity of the check valve 5 and ensuring the stability of the pump body 1's self-starting and stopping function.

[0054] Preferably, the check valve 5 is a plastic flap valve or a metal flap valve. Plastic flap valves are lightweight, flexible in opening and closing, and corrosion-resistant, making them suitable for common water qualities such as tap water and purified water, and offering cost-effectiveness. They are ideal for low-pressure household applications such as water heater pressurization and daily water supply pressurization. Metal flap valves offer higher pressure resistance and wear resistance, making them suitable for high-pressure conditions such as secondary pressurization in high-rise buildings and high-flow water supply. The availability of both valve types allows the pump assembly to cover more household pressurization scenarios, resulting in greater compatibility.

[0055] Preferably, the pump body 1 is provided with a maintenance channel 8, the axis of the maintenance channel 8 coincides with the disassembly direction axis of the filter assembly 4, and the axis of the maintenance channel 8 is perpendicular to the axis of the flow channel connecting the water inlet 2 and the impeller cavity 14.

[0056] Specifically, the flow channel connecting the outlet 3 and the impeller cavity 14 includes a second flow channel 9, the axis of which is parallel to the axis of the first flow channel 6. Both the first flow channel 6 and the second flow channel 9 are connected to the maintenance channel 8. More preferably, the axes of both the first flow channel 6 and the second flow channel 9 are perpendicular to the axis of the maintenance channel 8.

[0057] Preferably, a maintenance opening 15 is provided on the second flow channel 9, and a sealing component 13 is installed on the maintenance opening 15. The sealing component 13 and the maintenance opening 15 are detachably connected, and the sealing component 13 and the maintenance opening 15 can be sealed together. The axis of the maintenance opening 15 is coaxial with the axis of the maintenance channel 8. The maintenance opening 15 and the maintenance channel 8 serve the dual functions of disassembling and assembling the filter assembly 4 and filling and venting the pump body 1. It eliminates the need to separately open filter maintenance holes and vent holes on the pump body 1, reduces the number of processing steps and parts of the pump body 1, simplifies the overall structural design, and reduces research and development and manufacturing costs.

[0058] The sealing element 13 and the maintenance opening 15 can be sealed together, effectively sealing the maintenance opening 15 and preventing fluid in the flow channel from leaking from the second flow channel 9 when the pump body 1 is running.

[0059] More specifically, in this embodiment, the sealing element 13 is threadedly connected to the maintenance opening 15.

[0060] When disassembling or assembling the filter assembly 4, simply unscrew the sealing piece 13 and operate directly through the maintenance channel 8 without disassembling the pump body 1 or external pipelines. This simplifies the operation and significantly reduces maintenance time. After the pump body 1 is initially started or emptied, liquid filling and venting can be completed through the same channel without additional tools. This solves the problems of cumbersome liquid filling and venting of the traditional pump body 1 and inconvenient maintenance of the filter assembly 4, allowing non-professional users to operate independently.

[0061] Preferably, the maintenance opening 15 and the maintenance channel 8 are machined coaxially in one go to ensure their coaxiality and also to ensure the installation dimensions of the filter basket 41.

[0062] Preferably, the sealing member 13 has a sealing installation groove, the second sealing ring 16 is installed in the sealing installation groove, the sealing member 13 is threaded to the maintenance opening 15, the second sealing ring 16 is located between the end face of the maintenance opening 15 and the sealing installation groove, after the sealing member 13 is fastened to the maintenance opening 15, the second sealing ring 16 is squeezed to seal the gap between the two and prevent water leakage.

[0063] Preferably, the gap between the inner wall of the maintenance channel 8 and the outer wall of the filter basket 41 is in the range of 0.5mm-2mm.

[0064] Preferably, the filter basket 41 has a filter pore size of 80-250 mesh, and the material of the filter basket 41 is stainless steel, brass, or high-strength engineering plastic. The tensile strength of the aforementioned high-strength engineering material is ≥50MPa (GB / T 1040 standard test) to ensure that the filter basket 41 does not deform under tightening installation and water flow impact. The bending strength is ≥70MPa (GB / T 9341 standard test) to prevent the filter basket 41 from bending or collapsing after long-term pressure. The impact strength (notched) is ≥5kJ / m. 2 (Tested according to GB / T 1843 standard) It can withstand minor collisions during installation and disassembly, as well as instantaneous impacts from water flow, without becoming brittle. Hardness ≥85D (Shore hardness, tested according to GB / T 2411 standard) to prevent the inner wall of the filter basket 41 from being scratched or worn by small impurities in the water flow.

[0065] The high-strength engineering material filter basket 41 can withstand a working water pressure of 0.6-1.6MPa (the normal pressure range for household pumps) and will not deform or crack after long-term use (≥5000 hours). After immersion in tap water, purified water, or other media, the strength decreases by ≤10%, without swelling, aging, or embrittlement. The heat distortion temperature is ≥80℃ (tested according to GB / T 1634 standard), and the temperature rise during operation of the pump body 1 will not cause dimensional deviation leading to seal failure.

[0066] Specifically, the aforementioned high-strength engineering materials include any one of glass fiber reinforced nylon (PA66+GF30 / GF50), polyphenylene ether (PPO / PSU), polyphenylene sulfide (PPS), polycarbonate (PC), and polyether ether ketone (PEEK).

[0067] The filter basket 41 described above has a pore size ranging from 80 to 250 mesh, which can meet the needs of household use. The 80-mesh filter basket 41 can effectively intercept large particles of impurities such as sediment and rust to prevent clogging of key components of the pump body 1, while the 250-mesh filter basket 41 can intercept fine suspended solids to meet the high-precision requirements of water purifiers and drinking water pretreatment. The pore size design avoids increasing water flow resistance due to excessive fineness to ensure pressurization efficiency, while also avoiding letting key impurities slip through due to excessive coarseness, thus balancing filtration effect and flow efficiency and solving the problem of limited applicability of a single pore size.

[0068] Preferably, the flow channel connecting the outlet 3 and the impeller cavity 14 further includes a third flow channel 10, which is connected to the second flow channel 9.

[0069] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A pump body assembly with a filter structure, characterized in that, The pump body (1) includes an inlet (2) and an outlet (3) arranged axially parallel to each other. The pump body (1) has a flow channel connecting the inlet (2) and the outlet (3). The flow channel is provided with a filter assembly (4) and a check valve (5). The filter assembly (4) and the pump body (1) are detachably connected. Fluid enters through the inlet (2) and flows sequentially through the filter assembly (4), the check valve (5), the impeller cavity (14) of the pump body (1), and the outlet (3).

2. The pump assembly with a filter structure according to claim 1, characterized in that, A sealing structure is provided between the filter assembly (4) and the pump body (1). The sealing structure can prevent the high-pressure water in the flow channel from flowing back and prevent the water entering through the inlet (2) from entering the outlet (3) without passing through the filter assembly (4).

3. The pump assembly with a filter structure according to claim 1, characterized in that, The flow channel and the filter assembly (4) are threaded together.

4. The pump body assembly with filter structure according to claim 3, characterized in that, The inlet (2) and the impeller cavity (14) form a first flow channel (6). A maintenance channel (8) is provided on the pump body (1). The axis of the maintenance channel (8) coincides with the disassembly direction axis of the filter assembly (4). And / or, the axis of the maintenance channel (8) is perpendicular to the axis of the first flow channel (6).

5. The pump body assembly with a filter structure according to claim 4, characterized in that, The flow channel connecting the outlet (3) and the impeller cavity (14) includes a second flow channel (9), the axis of which is parallel to the axis of the first flow channel (6).

6. The pump body assembly with filter structure according to claim 5, characterized in that, The second flow channel (9) is connected to the maintenance channel (8). A maintenance opening (15) is provided on the second flow channel (9). A sealing member (13) is detachably connected to the maintenance opening (15). The sealing member (13) and the maintenance opening (15) can be sealed together. The filter assembly (4) can pass through the maintenance opening (15) and be detachably connected to the maintenance channel (8).

7. The pump body assembly with filter structure according to claim 5, characterized in that, The filter assembly (4) is a cylindrical filter basket (41). And / or, the filter basket (41) has a filter pore size range of 80-250 mesh, and the filter basket (41) is made of stainless steel, brass or high-strength engineering plastic.

8. The pump assembly with a filter structure according to claim 7, characterized in that, The filter basket (41) is threaded to the maintenance channel (8).

9. The pump assembly with a filter structure according to claim 7, characterized in that, The check valve (5) is located in the first flow channel (6). After the fluid enters the filter basket (41) through the inlet (2), the fluid opens the check valve (5) and enters the impeller chamber (14).

10. The pump body assembly with a filter structure according to any one of claims 7-9, characterized in that, A receiving groove (7) is provided on the side wall of the first flow channel (6). The central axis of the receiving groove (7) is coaxial with the central axis of the maintenance channel (8). One end of the filter basket (41) is inserted into the receiving groove (7).

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