Air-cooled household permanent magnet variable frequency self-priming centrifugal pump

Abstract

This invention relates to an air-cooled household permanent magnet variable frequency self-priming centrifugal pump, solving the problems of high noise and poor cooling effect in existing technologies. The technical solution includes: a base, a housing that mates with the base, a motor housed within the housing, and a pump body connected to the motor. Both the motor and pump body are mounted on the base. A fan is mounted on the motor shaft. The motor cable exits through the housing. The pump body is a self-priming centrifugal pump, and the motor is a permanent magnet variable frequency motor. The fan includes a fan impeller and a fan cylinder. The fan impeller is housed within the inner cavity of the fan cylinder, which is a cylindrical shape open at both ends. One end of the fan cylinder is located near the motor housing, and the other end is fitted to the corresponding inner wall of the housing. Ventilation holes are provided on the housing corresponding to the end of the fan cylinder, with the area of ​​the ventilation holes matching the area of ​​the fan cylinder openings. The ventilation holes and the fan cylinder together form a fan cover. The effects are: low noise and good cooling effect.

Description

Technical Field

[0001] This invention relates to a household booster pump, and more particularly to an air-cooled household permanent magnet variable frequency self-priming centrifugal pump. Background Technology

[0002] I. Traditional household booster pumps are mostly vortex pumps, which have the following problems: loud noise, low efficiency, inability to adjust constant pressure, low speed, and large size; and the flow parts are mostly made of cast iron, which often contains rust.

[0003] Second, although a centrifugal booster pump was recently used, problems still exist: the noise level of the whole machine still does not meet the user's satisfaction level, and it is large in size, heavy in weight, and has high manufacturing cost, and does not have a self-priming function.

[0004] Third, the appearance of traditional water pumps is not ideal, especially when used in homes. The water pumps placed in the home look out of place and affect the overall visual effect of the room. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems existing in the prior art by providing an air-cooled household permanent magnet variable frequency self-priming centrifugal pump. This centrifugal pump is used to pressurize household water pipes, avoiding situations where water cannot be pumped due to air in the inlet pipe or lack of inlet pressure. It achieves rapid and stable pressurization. The fan cover structure is modified by using a fan cylinder with open ends and ventilation holes on the cover. This combination of ventilation holes and fan cylinder creates the effect of a traditional fan cover, simplifying the fan cover structure, reducing raw material consumption, improving ventilation through ventilation holes on the cover, enhancing the air-cooled motor cooling effect, and also reducing fan noise.

[0006] The above-mentioned technical objective of this invention is mainly achieved through the following technical solution: an air-cooled household permanent magnet variable frequency self-priming centrifugal pump, comprising a base, a housing that cooperates with the base, a motor disposed within the housing, and a pump body connected to the motor, both the motor and the pump body being disposed on the base, a fan being disposed on the motor shaft, and the motor cable passing through the housing, characterized in that the pump body is a self-priming centrifugal pump body, the motor is a permanent magnet variable frequency motor, the fan comprises a fan impeller and a fan cylinder, the fan impeller being disposed within the inner cavity of the fan cylinder, the fan cylinder being a cylindrical shape with openings at both ends, one end of the fan cylinder being positioned near the end of the motor housing, and the other end being adapted to the corresponding inner wall of the housing, the housing having ventilation holes provided at the portion corresponding to the end of the fan cylinder, the area of ​​the portion where the ventilation holes are provided being adapted to the opening area of ​​the fan cylinder, the portion where the ventilation holes are provided forming a fan cover with the fan cylinder, which also helps to reduce fan noise.

[0007] A centrifugal pump is used to boost the pressure of domestic water pipes, avoiding situations where water cannot be supplied due to air in the inlet pipe or lack of inlet pressure. This achieves rapid and stable pressure boosting. The structure of the fan cover is modified by using a fan cylinder with open ends and ventilation holes on the cover. This combination of ventilation holes and fan cylinder creates the effect of a traditional fan cover, simplifying the fan cover structure, reducing raw material consumption, and improving ventilation by adding ventilation holes to the cover, thereby enhancing the air-cooled motor cooling effect.

[0008] Traditional fan covers have a three-sided enclosure structure, consisting of a fan cylinder and a fan cover base plate that seals one end of the fan cylinder. Ventilation holes are provided on the fan cover base plate, but no ventilation holes are provided on the cover itself. When the fan is working, it can only increase the airflow inside the cover, resulting in poor cooling effect.

[0009] In addition, the motor adopts a permanent magnet variable frequency motor, in which the permanent magnet is made of ferrite material, which has the characteristics of temperature resistance, low magnetic noise, low cost, high cost performance, energy saving and high efficiency. Moreover, the motor is a synchronous motor, and the speed is much higher than that of traditional motors. Under the same hydraulic performance requirements, the volume of hydraulic components such as impeller, guide vane (pump body includes pump casing and mutually cooperating impeller and guide vane set in the inner end of pump casing) pump casing can be greatly reduced.

[0010] In addition, it is equipped with a control system, which includes a control board and an integrated temperature and pressure sensor. The control board is mounted on the casing, and the sensor is located at the pump outlet, enabling intelligent control. The water pump can automatically start and stop, maintain constant pressure and variable speed, and has multiple protection functions: 1. Anti-freeze function: Automatic operation when the water temperature is too low to prevent freezing and cracking. 2. Overheat protection function: Water pump alarm and shutdown protection when the water temperature is too high. 3. Anti-jamming function: Automatic protection and alarm in case the water pump jams.

[0011] Further optimization involves adding a self-priming reflux structure to the pump body, which provides self-priming functionality, broadens the product's application range, and enables water to be pumped even when there is air in the inlet pipe or no inlet pressure, thus achieving pressurization.

[0012] As a further improvement and supplement to the above technical solution, the present invention adopts the following technical measures:

[0013] The outer wall of the fan cylinder is provided with a cable hook, which cooperates with the cable to limit and guide the cable. The base is provided with a cable outlet, which is correspondingly provided with the hook groove of the cable hook.

[0014] The upper end of the motor is provided with a cable outlet, through which the cable exits the motor. The cable outlet, the cable hook, and the cable exit are arranged longitudinally in sequence, with the longitudinal direction perpendicular to the base. The cable hook is located between the cable outlet and the cable exit.

[0015] The cable hook is axially positioned with the axis of the motor shaft as the axial direction, and the opening of the cable hook faces the corresponding end of the motor housing.

[0016] The base is equipped with shock-absorbing feet and shock-absorbing foot insertion holes. Each shock-absorbing foot comprises a frustum-shaped body and a pin portion, which are integrally formed. The shock-absorbing foot is made of rubber. The pin portion inserts into the shock-absorbing foot insertion hole, and the frustum-shaped body supports the base. The lower end face of the base mates with the shock-absorbing foot, which provides shock absorption, making the water pump operate more smoothly and with lower noise. The shock-absorbing foot differs from traditional shock-absorbing feet primarily in that: traditional shock-absorbing feet consist of a rubber support (equivalent to the frustum-shaped body in this technical solution) and a plastic pin. The plastic pin is fixed to the rubber support and is inserted into the shock-absorbing foot insertion hole by deformation. After being inserted into the base, the plastic pin is prone to falling out, resulting in unstable and poor shock absorption. Alternatively, the pin part can be a screw, and a rubber support body (equivalent to the frustum of this technical solution) can be formed by rubber injection molding. At the same time, the screw is wrapped in rubber and stands on the rubber support body. For this kind of shock-absorbing foot, the mold cost is high and the material cost is also high. It is fixed to the base by threads, and the plastic base needs to be inlaid with threaded inserts and thickened, which is costly. In addition, after the foot is embedded with the screw, the hardness is high, which affects the shock absorption effect.

[0017] The base is a plastic base, and at least four shock-absorbing feet are evenly arranged on the base. The pin part is interference-fitted with the shock-absorbing foot socket.

[0018] A pump cover is provided between the pump body and the motor. The pump cover is made of stainless steel, while the impeller and guide vanes in the pump body are made of engineering plastic.

[0019] The housing includes a top and sidewalls arranged opposite to the base, the top and sidewalls being an integral structure. The lower end of the sidewall surrounds the periphery of the base's sidewall, allowing the base to be accommodated within the housing. The overall structure is compact, with no cast iron parts, small size, and light weight. The outer housing is professionally designed and features a plastic paint layer, providing a refined and aesthetically pleasing visual effect and greatly enhancing the user experience.

[0020] The beneficial effects of this invention are as follows: 1. The use of a permanent magnet variable frequency self-priming centrifugal pump for pressurizing domestic water pipes avoids situations where water cannot be pumped due to air in the inlet pipe or lack of inlet pressure, achieving rapid and stable pressurization. 2. The structure of the fan cover is modified by using a fan cylinder with open ends and ventilation holes on the cover. This simplifies the fan cover structure, reduces material consumption, and improves ventilation by adding ventilation holes to enhance the cooling effect of the motor, while also reducing fan noise. 3. The shape and material of the cover are changed to improve the pump's visual appeal and enhance the user experience. 4. The vibration damping feet are improved to enhance their effectiveness and further reduce noise. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of an axial cross-sectional structure of the present invention.

[0022] Figure 2 This is a three-dimensional structural diagram of the drive cover of the present invention.

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the present invention.

[0024] Figure 4 This is a schematic diagram of the structure of the fan cylinder involved in the present invention.

[0025] Figure 5 This is a schematic diagram of the shock-absorbing foot involved in the present invention. Detailed Implementation

[0026] The technical solution of the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0027] Example: Figure 1-5 As shown, a wind-cooled household permanent magnet variable frequency self-priming centrifugal pump includes a base 1, a housing 2 that cooperates with the base, a motor 3 installed inside the housing, and a pump body 4 connected to the motor. Both the motor and the pump body are installed on the base. A fan is installed on the shaft of the motor, and the motor cable passes through the housing.

[0028] The pump body is a self-priming centrifugal pump body, the motor is a permanent magnet variable frequency motor, and the fan includes a fan impeller 5 and a fan cylinder 6. The fan impeller is disposed in the inner cavity of the fan cylinder. The fan cylinder is a cylindrical shape with openings at both ends. One end of the fan cylinder is located near the end of the motor housing, and the other end is adapted to the corresponding inner wall of the cover. The cover is provided with ventilation holes 21 at the part corresponding to the end of the fan cylinder. The area of ​​the ventilation hole is adapted to the opening area of ​​the fan cylinder. The part of the ventilation hole and the fan cylinder form a fan cover, which also helps to reduce fan noise.

[0029] A centrifugal pump is used to boost the pressure of domestic water pipes, avoiding situations where water cannot be supplied due to air in the inlet pipe or lack of inlet pressure. This achieves rapid and stable pressure boosting. The structure of the fan cover is modified by using a fan cylinder with open ends and ventilation holes on the cover. This combination of ventilation holes and fan cylinder creates the effect of a traditional fan cover, simplifying the fan cover structure, reducing raw material consumption, and improving ventilation by adding ventilation holes to the cover, thereby enhancing the air-cooled motor cooling effect.

[0030] Traditional fan covers have a three-sided enclosure structure, consisting of a fan cylinder and a fan cover base plate that seals one end of the fan cylinder. Ventilation holes are provided on the fan cover base plate, but no ventilation holes are provided on the cover itself. When the fan is working, it can only increase the airflow inside the cover, resulting in poor cooling effect.

[0031] In addition, the motor adopts a permanent magnet variable frequency motor, in which the permanent magnet is made of ferrite material, which has the characteristics of temperature resistance, low magnetic noise, low cost, high cost performance, energy saving and high efficiency. Moreover, the motor is a synchronous motor, and the speed is much higher than that of traditional motors. Under the same hydraulic performance requirements, the volume of hydraulic components such as impeller, guide vane (pump body includes pump casing and mutually cooperating impeller and guide vane set in the inner end of pump casing) pump casing can be greatly reduced.

[0032] In addition, it is equipped with a control system, which includes a control board and an integrated temperature and pressure sensor. The control board is mounted on the casing, and the sensor is located at the pump outlet, enabling intelligent control. The water pump can automatically start and stop, maintain constant pressure and variable speed, and has multiple protection functions: 1. Anti-freeze function: Automatic operation when the water temperature is too low to prevent freezing and cracking. 2. Overheat protection function: Water pump alarm and shutdown protection when the water temperature is too high. 3. Anti-jamming function: Automatic protection and alarm in case the water pump jams.

[0033] Further optimization involves adding a self-priming reflux structure 7 to the pump body, which has a self-priming function, expanding the product's application range. It can also fill with water and achieve pressurization even when there is air in the inlet pipe or no inlet pressure.

[0034] To increase the strength of the fan casing, axial reinforcing ribs 62 are provided on the side wall, and multiple connection holes are provided on the side wall of the fan casing to fix the fan cover to the motor through connectors.

[0035] To prevent the cables from becoming tangled and affecting the installation of the casing, a cable hook 61 is provided on the outer wall of the fan cylinder. The cable hook cooperates with the cable to limit and guide its movement. A cable outlet 22 is provided on the base, and the cable outlet is correspondingly arranged with the hook groove of the cable hook. The cable hook 61 and the fan cylinder are an integral structure.

[0036] In order to better limit and guide the cable, a cable outlet 41 is provided at the upper end of the motor. The cable passes through the cable outlet and exits the motor. The cable outlet 41, the cable hook 61, and the cable exit 22 are arranged longitudinally in sequence with the direction perpendicular to the base as the longitudinal direction. The cable hook is located between the cable outlet and the cable exit.

[0037] The cable hook 61 is axially arranged with the axis of the motor shaft as the axial direction, and the opening of the cable hook faces the corresponding end of the motor housing.

[0038] The base is equipped with shock-absorbing feet 8 and shock-absorbing foot insertion holes. Each shock-absorbing foot includes a frustum-shaped body 81 and a pin portion 82, which are integrally formed. The shock-absorbing foot is made of rubber. The pin portion inserts into the shock-absorbing foot insertion hole, and the frustum-shaped body supports the base. The lower end face of the base mates with the shock-absorbing foot, which provides shock absorption, making the water pump run more smoothly and with lower noise. The shock-absorbing foot differs from traditional shock-absorbing feet mainly in that: traditional shock-absorbing feet include a rubber support (equivalent to the frustum-shaped body in this technical solution) and a plastic pin. The plastic pin is fixed on the rubber support and is inserted into the shock-absorbing foot insertion hole by deformation. After being inserted into the base, the plastic pin is prone to falling off, resulting in unstable and poor shock absorption. Alternatively, the pin part can be a screw, and a rubber support body (equivalent to the frustum of this technical solution) can be formed by rubber injection molding. At the same time, the screw is wrapped in rubber and stands on the rubber support body. For this kind of shock-absorbing foot, the mold cost is high and the material cost is also high. It is fixed to the base by threads, and the plastic base needs to be inlaid with threaded inserts and thickened, which is costly. In addition, after the foot is embedded with the screw, the hardness is high, which affects the shock absorption effect.

[0039] The base 2 is a plastic base, and at least four shock-absorbing feet are evenly arranged on the base. The pin part is interference-fitted with the shock-absorbing foot socket.

[0040] A pump cover 9 is provided between the pump body and the motor. The pump cover is made of stainless steel, while the impeller and guide vanes in the pump body are made of engineering plastic.

[0041] The housing includes a top and sidewalls arranged opposite to the base, the top and sidewalls being an integral structure. The lower end of the sidewall surrounds the periphery of the base's sidewall, allowing the base to be accommodated within the housing. The overall structure is compact, with no cast iron parts, small size, and light weight. The outer housing is professionally designed and features a plastic paint layer, providing a refined and aesthetically pleasing visual effect and greatly enhancing the user experience.

Claims

1. A wind-cooled household permanent magnet variable frequency self-priming centrifugal pump, comprising a base, a housing that mates with the base, a motor disposed within the housing, and a pump body connected to the motor, wherein both the motor and the pump body are mounted on the base, a fan is mounted on the motor shaft, and the motor cable extends out of the housing, characterized in that... The pump body is a self-priming centrifugal pump body, the motor is a permanent magnet variable frequency motor, and the fan includes a fan impeller and a fan cylinder. The fan impeller is disposed in the inner cavity of the fan cylinder. The fan cylinder is a cylindrical shape with openings at both ends. One end of the fan cylinder is located near the end of the motor housing, and the other end is adapted to the corresponding inner wall of the cover. The cover is provided with ventilation holes at the part corresponding to the end of the fan cylinder. The area of ​​the ventilation holes is adapted to the opening area of ​​the fan cylinder, and the part of the ventilation holes and the fan cylinder form a fan cover. The outer wall of the fan cylinder is provided with a cable hook, which cooperates with the cable to limit and guide the cable. The base is provided with a cable outlet, which is corresponding to the hook groove of the cable hook. The upper end of the motor is provided with a cable outlet, through which the cable exits the motor. The cable outlet, the cable hook, and the cable exit are arranged longitudinally in sequence, with the longitudinal direction perpendicular to the base. The cable hook is located between the cable outlet and the cable exit.

2. The air-cooled household permanent magnet variable frequency self-priming centrifugal pump according to claim 1, characterized in that... The cable hook is axially positioned with the axis of the motor shaft as the axial direction, and the opening of the cable hook faces the corresponding end of the motor housing.

3. The air-cooled household permanent magnet variable frequency self-priming centrifugal pump according to claim 1 or 2, characterized in that... The base is provided with shock-absorbing feet and shock-absorbing foot insertion holes. The shock-absorbing foot includes a truncated cone body and a pin part, which are integral structures. The shock-absorbing foot is made of rubber. The pin part is inserted into the shock-absorbing foot insertion hole, and the truncated cone body is supported by the base.

4. The air-cooled household permanent magnet variable frequency self-priming centrifugal pump according to claim 3, characterized in that... The base is a plastic base, and at least four shock-absorbing feet are evenly arranged on the base. The pin part is interference-fitted with the shock-absorbing foot socket.

5. The air-cooled household permanent magnet variable frequency self-priming centrifugal pump according to claim 1 or 2, characterized in that... A pump cover is provided between the pump body and the motor. The pump cover is made of stainless steel, while the impeller and guide vanes in the pump body are made of engineering plastic.

6. The air-cooled household permanent magnet variable frequency self-priming centrifugal pump according to claim 1 or 2, characterized in that... The housing includes a top and sidewalls in the surrounding directions that are disposed opposite to the base. The top and sidewalls are an integral structure. The lower end of the sidewall surrounds the periphery of the sidewall of the base, so that the base is accommodated in the housing.

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