Booster pump for water purifier

Abstract

The booster pump comprises a pump shell and a rotor arranged in the pump shell, the pump shell is fixed in an installation cavity of the water purifier, the rotor is connected with a rotating shaft, the rotating shaft comprises an output section, one side of the pump shell is provided with a through hole, the output section penetrates through the through hole and extends out of the pump shell, and the output section is connected with the pump shell. A heat dissipation piece is fixed to the output section, the installation cavity is matched with the pump shell to form a heat dissipation channel facing the heat dissipation piece, and the output section is sleeved with a sealing piece so as to seal a gap between the pump shell and the output section. The rotating shaft is provided with the output section, the heat dissipation piece is fixed on the output section, the output section drives the heat dissipation piece, the heat dissipation channel is formed in the installation cavity where the booster pump is located, and the heat dissipation piece is matched with the heat dissipation channel to dissipate heat of the booster pump, so that heat generated when the booster pump works is discharged out of the machine body, and the service life is prolonged; and a sealing piece is arranged at the gap between the output section and the pump shell, so that the waterproof performance of the booster pump is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to water purification technical field, especially a kind of booster pump for water purifier. BACKGROUND

[0002] With people pay more and more attention to drinking water safety, the application of water purification equipment is also more and more widely. Water purification equipment can effectively guarantee drinking water safety to a certain extent by deep filtration and purification treatment of water. Reverse osmosis water purifier is the mainstream water purification equipment on the market, which can filter out mud, bacteria, minerals and heavy metals in water to produce pure water and ensure the safety of drinking water. Therefore, it has become a popular electric product in family life.

[0003] The existing reverse osmosis water purifier needs to use a booster pump to pressurize tap water to improve the water production efficiency of the water purifier. The booster pump increases the pre-RO membrane pressure to force water molecules to pass through the RO membrane to achieve the purpose of purification. However, in the prior art, the pump body of the booster pump is not provided with a heat dissipation device or the heat dissipation structure design is unreasonable. In the working state, a large amount of heat is generated and cannot be discharged in time, which increases the maintenance cost of the whole machine and affects the service life of the booster pump.

[0004] Based on the above problems, the prior art provides a booster pump applied to a water purifier, which includes a filter core, a booster pump and a radiator. The booster pump is arranged on the raw water pipeline of the filter core, and the radiator is arranged on the pure water pipeline of the filter core. The booster pump at least includes a pump shell, a pump shaft, a rotor and a fan. The fan is drivingly connected to the outer end of the pump shaft and located outside the pump shell. The fan blows towards the radiator, and the air supply of the fan is supplied to the radiator to accelerate the heat dissipation of the radiator. The structure is simple and the cost is low.

[0005] However, in the above-mentioned scheme, the booster pump with heat dissipation function cannot meet the requirements of IPX4 or IPX5 waterproof level, and there are problems of water inlet and water leakage leading to electrical appliance failure. In addition, the radiator needs to be additionally installed on the outer end of the pump shaft, which increases the operating burden and part cost of the booster pump.

[0006] Therefore, there is an urgent need for a simple structure design that can simultaneously solve the heat dissipation and waterproof functions of the booster pump. SUMMARY

[0007] To solve the above problems, the utility model provides a booster pump for water purifier, which solves the heat dissipation of the booster pump device and improves the waterproof level of the booster pump to prevent the damage of electrical components caused by internal water inlet.

[0008] The technical scheme of the utility model is as follows:

[0009] A booster pump for a water purifier, comprising a pump shell and a rotor arranged inside the pump shell, the pump shell is fixed in a mounting cavity of the water purifier, the rotor is connected with a rotating shaft, the rotating shaft comprises an output section, one side of the pump shell is provided with a through hole, the output section extends to the outside of the pump shell through the through hole, the output section is fixed with a heat dissipation piece, the mounting cavity cooperates with the pump shell to form a heat dissipation channel towards the heat dissipation piece, and a sealing piece is sleeved on the output section to seal the gap between the pump shell and the output section.

[0010] As an embodiment of the utility model, the pump shell comprises a shell assembly, and a front cover and a rear cover are respectively arranged on both sides of the shell assembly, the rear cover is provided with a shaft seal chamber facing the heat dissipation piece, and the sealing piece is fixed in the shaft seal chamber.

[0011] As an embodiment of the utility model, the through hole is arranged at the top of the shaft seal chamber, and the inner wall of the shaft seal chamber and the sealing piece are in interference fit, transition fit or gap fit with the output section and the shaft seal chamber.

[0012] As an embodiment of the utility model, the output section is further provided with a bearing, the bearing is fixed below the shaft seal chamber, and the bearing cooperates with the shaft seal chamber to form a limiting part for limiting the sealing piece.

[0013] As an embodiment of the utility model, the shaft seal chamber is further provided with an elastic piece, the elastic piece comprises a gasket and a spring fixed above the gasket, the spring is arranged between the sealing piece and the gasket, and the gasket is kept close to the upper surface of the bearing by the elastic force of the spring.

[0014] As an embodiment of the utility model, the sealing piece comprises a support frame and an elastic rubber sleeved outside the support frame, the elastic rubber is provided with a sealing lip at the top, and the sealing lip is fixed below the through hole to realize elastic sealing between the output section and the elastic rubber.

[0015] As an embodiment of the utility model, the inner side of the elastic rubber is provided with lubricating grease, and the lubricating grease is attached to the surface of the output section when the output section cooperates with the sealing lip.

[0016] As an embodiment of the utility model, the output section is provided with a fixing part, the fixing part is provided with a protruding structure distributed in the axial direction, the middle part of the heat dissipation piece is provided with a mounting hole, the heat dissipation piece penetrates into the output section through the mounting hole and is fixed to the protruding structure.

[0017] As an embodiment of the utility model, the heat dissipation piece comprises a fan blade and a mounting plate for fixing the fan blade, the fan blade is arranged towards the pump shell and is distributed in the circumferential direction along the axis of the mounting hole.

[0018] As an embodiment of the utility model, the output section extends to the outside of the mounting cavity, and the end of the output section is provided with a connecting part, and the connecting part comprises a flexible shaft and a connector for connecting external equipment.

[0019] The technical effects of the utility model are as follows:

[0020] The rotating shaft in the utility model comprises an output section extending to the outside of a pump shell, and a heat dissipation piece is fixed on the output section, the heat dissipation piece is driven by the output section, and a heat dissipation channel is formed in the mounting cavity where the booster pump is located, the heat dissipation piece cooperates with the heat dissipation channel to dissipate heat of the booster pump, so that the heat generated by the booster pump during operation is discharged to the outside of the body of the water purifier, the service life of the booster pump is improved, and at the same time, since the output section extends to the outside of the pump shell, the waterproof level of the booster pump as a whole is reduced, the utility model is provided with a sealing piece at the gap between the output section and the pump shell, so that water can be effectively prevented from entering the inside of the booster pump in the rotating state and the static state of the rotating shaft, the occurrence of electrical faults or even fire is avoided, the safety is improved, and the structure of the utility model is simple, convenient to disassemble and assemble, and the parts and installation costs are effectively controlled.

[0021] The pump shell is provided with a shaft seal chamber in the direction close to the heat dissipation piece, the sealing piece is fixed in the form of a shaft seal, a through hole is arranged on the shaft seal chamber to facilitate the output end to extend out of the pump shell, based on the anti-deformation capacity of the sealing piece, various fixing modes such as interference fit, transition fit or gap fit can be flexibly selected, and at the same time, the shaft seal chamber is arranged above the bearing structure, the sealing piece is axially and radially limited by the bearing structure and the shaft seal chamber respectively, and the waterproof capacity of the sealing piece is further improved.

[0022] The sealing piece in the utility model mainly comprises a supporting frame and an elastic rubber sleeved outside the supporting frame, a sealing lip is arranged at the top of the elastic rubber, the elastic rubber and the output section are elastically sealed through the sealing lip to improve the overall sealing performance of the sealing piece, and the inner side of the elastic rubber is provided with lubricating grease, when the rotating shaft passes through the middle part of the sealing piece, the lubricating grease is attached to the surface of the output section, and the long-term lubrication and cooling effect is achieved.

[0023] The fixing part is provided with protruding structures distributed in axial direction, which realize interference fit with the heat dissipation member, so that the heat dissipation member is fixed in axial direction and is circumferentially fixed during rotation, so that the heat dissipation member rotates at the same speed as the output section, reducing the loss during energy transmission. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings required by the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0025] Figure 1 It is a whole structure sectional view of the water purifier in the embodiment;

[0026] Figure 2 It is a whole structure sectional view of the booster pump in the embodiment;

[0027] Figure 3 It is a partial structure sectional view of the booster pump in the embodiment;

[0028] Figure 4 It is an exploded view of the structure of the booster pump in the embodiment;

[0029] Figure 5 It is a partial structure sectional view of the booster pump in another embodiment of the present application;

[0030] Figure 6 It is a structure cooperation schematic view of the sealing member and the shaft seal chamber in the embodiment;

[0031] Figure 7 It is a structure sectional view of the sealing member in the embodiment;

[0032] Figure 8 It is a structure schematic view of the rotating shaft and the heat dissipation member separated in the embodiment;

[0033] Figure 9 It is a whole structure sectional view of the water purifier with the connecting part in the embodiment;

[0034] REFERENCE SIGNS:

[0035] 1, pump shell; 11, through hole; 12, machine shell assembly; 13, front cover; 14, rear cover; 15, shaft seal chamber; 16, screw; 2, rotor; 3, mounting cavity; 4, rotating shaft; 41, output section; 42, bearing; 43, fixed part; 5, heat dissipation piece; 51, mounting hole; 52, fan blade; 53, mounting plate; 6, heat dissipation channel; 7, sealing element; 71, support frame; 72, elastic rubber; 73, sealing lip; 74, lubricating grease; 8, elastic element; 81, gasket; 82, spring; 9, connecting part; 91, flexible shaft; 92, connector. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0037] The utility model discloses a kind of booster pumps for water purifier, including pump shell and the rotor being located in the inside of pump shell, pump shell is fixed in the mounting cavity of water purifier, rotor is connected with rotating shaft, wherein, rotating shaft includes output section, one side of pump shell is equipped with through hole, output section extends to the outside of pump shell through through hole, output section is fixed with heat dissipation piece, mounting cavity cooperates with pump shell to form the heat dissipation channel towards heat dissipation piece, sealing element is sleeved on output section, to seal the gap between pump shell and output section.

[0038] In the above scheme, the output end is arranged on one side of the rotating shaft, and the output section extends out of the pump shell to fix the heat dissipation piece. The heat dissipation piece is used to dissipate heat of the booster pump device, preventing the problem of excessive temperature caused by heat accumulation of the booster pump. The service life of the booster pump is prolonged. At the same time, the mounting cavity cooperates with the pump shell to form a heat dissipation channel, and the air direction of the heat dissipation channel is arranged towards the heat dissipation piece. In this scheme, the output section needs to be extended to the outside of the pump shell, and the pump shell itself does not have a waterproof structure. Therefore, the waterproof level of the through hole cannot meet the IPX4 or IPX5 standard. At this time, a sealing element can be sleeved on the output section to seal the gap formed between the pump shell and the output section at the through hole, thereby enhancing the waterproof performance of the booster pump and avoiding safety problems such as electrical failure and fire caused by water entering the electrical components.

[0039] Specifically, as Figure 1 and Figure 2As shown, the embodiment provides a booster pump, comprising a pump shell 1 and a rotor 2, the rotor 2 is arranged in the inside of the pump shell 1, the pump shell 1 is fixedly installed in the installation cavity 3 of the water purifier, wherein the rotor 2 is connected with a rotating shaft 4, the rotating shaft 4 extends outward through the through hole 11 arranged on the pump shell 1 to form an output section 41 outside the pump shell, the output section 41 is installed with a heat dissipation piece 5, and the installation cavity 3 cooperates with the pump shell 1 to form a heat dissipation channel 6 matched with the heat dissipation piece 5, which is used for heat dissipation of the booster pump. The air inlet direction of the heat dissipation channel 6 is arranged towards the heat dissipation piece 5, so as to timely take away heat when the booster pump works, reduce the temperature of the booster pump, and prolong the service life. Further, since the rotating shaft 4 needs to pass through the through hole 11, the gap between the pump shell 1 and the output section 41 is not sealed, which causes the waterproof level of the through hole 11 to be relatively reduced, and there is a risk of water leakage. In the embodiment, the sealing piece 7 is sleeved on the output section, and the gap between the pump shell and the output section is sealed by the sealing piece 7, so as to prevent water outside the pump shell from entering the inside of the pump shell 1 through the through hole 11, thereby protecting the electrical devices in the pump shell 1.

[0040] In the embodiment, referring to Figure 2 and Figure 3 , the pump shell 1 comprises a shell assembly 12, and a front cover 13 and a rear cover 14 respectively installed on both sides of the shell assembly 12, wherein the middle part of the rear cover 14 is protrudingly provided with a shaft seal chamber 15 towards the heat dissipation piece 5, the shaft seal chamber 15 has a cavity structure inside, which is used for fixing the sealing piece 7, and the through hole 11 is arranged at the top middle position of the shaft seal chamber 15, so that the rotating shaft 4 is arranged at the middle position of the pump shell 1. As shown in detail in Figure 4 , the two sides of the front cover 13 are also provided with threads, and the rear cover 14, the shell assembly 12 and the front cover 13 are locked and fixed by cooperating with the screws 16. It should be noted that the components of the pump shell 1 fixed by the screws are only one specific embodiment in the embodiment, and other fixing modes can also be used instead. The embodiment does not make specific limitations.

[0041] In one specific embodiment of the embodiment, referring to Figure 2 , the gap between the shaft seal chamber 15 and the output section 41 is sealed in an interference fit manner between the inner wall of the shaft seal chamber 15 and the sealing piece 7. The sealing piece 7 is radially limited by the structure design of the shaft seal chamber 15, so as to form complete sealing of the shaft seal chamber 15, thereby preventing external moisture from entering the pump shell 1 through the output section 41. However, the interference fit mode may cause excessive deformation, which affects the concentricity of the sealing piece 7. When the output shaft 41 works for a long time, the sealing piece 7 is easily damaged. Therefore, the sealing piece 7 can also be fixed in a clearance fit or transition fit manner, so as to reduce the risk of deformation of the sealing piece. Specifically, in actual application, the installation and fixing mode of the sealing piece can be selected according to factors such as reliability of parts and specific waterproof requirements of devices.

[0042] In this embodiment, with reference to Figures 2-4 , the shaft 4 is also provided with a bearing 42 for improving the rotation accuracy, wherein the bearing 42 is arranged below the shaft seal chamber 15 and abuts against the lower surface of the sealing element 7, thereby supporting the sealing element 7 and achieving axial positioning of the sealing element 7, which, in combination with the radial positioning of the shaft seal chamber 15, fixes the sealing element 7 and prevents the sealing element 7 from shaking or falling off, thereby ensuring the reliability of the overall sealing structure. In another embodiment of this embodiment, as shown in Figure 5 , the shaft seal chamber 15 is also provided with an elastic element 8, including a gasket 81 and a spring 82 fixed above the gasket 81, wherein the spring 82 is arranged between the sealing element 7 and the gasket 81, and the gasket 81 is kept in close contact with the upper surface of the bearing 42 by the elastic force of the spring 82. The elastic element 8 and the bearing 42 jointly position the sealing element 7 axially, which, compared with the direct contact with the bearing 42, reduces the axial interference extrusion of the sealing element 7, and the overall structure is relatively more reliable, but requires additional elastic element 8 and space of the shaft seal chamber 15, and the structure of the pump housing 1 is relatively more complex.

[0043] As shown in Figure 6 and Figure 7 , the sealing element 7 includes a support frame 71 and an elastic rubber 72 sleeved outside the support frame 71, and the elastic rubber 72 is provided with a sealing lip 73 at the top, and the support frame 71 supports the elastic rubber 72, so that the elastic rubber 72 is not easy to deform. When the sealing element 7 is fixed in the shaft seal chamber 15, the sealing lip 73 is fixed below the through hole 11, wherein the elastic rubber 72 and the output section 41 are elastically sealed by the sealing lip 73, and the elastic rubber 72 and the shaft seal chamber 15 are in interference closed structure, and the sealing lip 73 also has the effect of sealing the through hole 11, which further enhances the overall sealing performance of the sealing element 7 to the pump housing 1 and the output section 41. In detail, the inner side of the elastic rubber 72 is also provided with a lubricating grease 74, which is in contact with the surface of the output section 41 when the output section 41 and the sealing lip 73 slide and seal. In this embodiment, the lubricating grease 74 lubricates the outer wall of the output section 41, and also cools the output section 41 when it works, which further enhances the overall heat dissipation effect of the supercharger pump in combination with the heat dissipation element 5.

[0044] In one embodiment of this embodiment, as shown in Figure 8As shown, the output section 41 is provided with a fixed portion 43, the fixed portion 43 is provided with protruding structures distributed in axial direction, and a mounting hole 51 is provided in the middle of the heat dissipation member 5, the heat dissipation member 5 is penetrated into the output section 41 and clamped outside the fixed portion 43 by using the mounting hole 51, and the protruding structures are in interference fit with the heat dissipation member 5. Specifically, the fixed portion 43 is a straight knurl including a plurality of protruding structures, the outer diameter D2 of the fixed portion 43 is greater than the inner diameter D1 of the mounting hole of the heat dissipation member, when the heat dissipation member 5 is mounted, the heat dissipation member 5 is penetrated into the protruding structures by one end of the output section 41 and clamped at the position of the protruding structures, so that the heat dissipation member 5 is fixed in axial direction, the protruding structures are penetrated into the heat dissipation member 5 to realize interference fit, so as to fix the heat dissipation member 5 in circumferential direction during rotation of the heat dissipation member 5, so that the heat dissipation member 5 rotates at the same speed as the output section 41, so as to improve utilization rate of kinetic energy of the rotating shaft 4.

[0045] In detail, referring to Figure 1 and Figure 4 , the heat dissipation member 5 includes a fan blade 52 and a mounting plate 53, the mounting hole 51 is arranged at the center position of the mounting plate 53, the fan blade 52 is arranged towards the pump shell 1, and is distributed in circumferential direction along the axial direction of the mounting hole 51, wherein the fan blade 52 and the pump shell 1 are kept a certain interval, the fan blade 52 plays a guiding role for the cold air flow along the heat dissipation channel 6, and at the same time, the fan blade 52 carries away heat between the heat dissipation member 5 and the pump shell 1, so as to prevent local heat accumulation, in the specific embodiment of the present embodiment, the fan blade can be arranged as a centrifugal fan blade, the cold air flow carries away heat after passing through the outer surface of the booster pump, since the whole machine of the water purifier is not completely sealed, the cold air flow can directly flow into the heat dissipation channel from the joints of parts of the whole machine, or the independent air inlet and air outlet can be designed separately, so as to avoid affecting other electrical devices.

[0046] In the present embodiment, as shown in Figure 9 , the output section 41 can extend towards the outside of the pump shell 1 until the outside of the mounting cavity 3, and a connecting portion 9 is arranged at the end of the output section 41, the connecting portion 9 includes a flexible shaft 91 and a connector 92 for connecting external devices, the flexible shaft 91 facilitates mounting of the connector 92 and the external devices, and improves flexibility during use, wherein the connector 92 can be connected with rotating working components such as screwdrivers, rotating blades, etc., and can be operated in rotation, for example, functions such as screwing, switching food materials or stirring liquids, or mixing dough, etc., by further expanding the functions of the output section, the booster pump device has multifunctionality.

[0047] The places not mentioned in the present application can be realized by using or referring to the existing technology.

[0048] The above merely describes a specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

[0049] Each of the embodiments in the specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment mainly describes the difference from other embodiments. The above merely describes the embodiments of the present application, and is not used to limit the present application. The present application can have various changes and modifications for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application should be included in the protection scope of the claims of the present application.

Claims

1. A booster pump for a water purifier, comprising a pump housing and a rotor arranged inside the pump housing, the pump housing being fixed in a mounting cavity of the water purifier, and a rotating shaft being connected to the rotor, characterized in that, The rotating shaft comprises an output section, one side of the pump shell is provided with a through hole, the output section extends to the outside of the pump shell through the through hole, a heat dissipation member is fixed on the output section, the mounting cavity cooperates with the pump shell to form a heat dissipation channel towards the heat dissipation member, and a sealing member is sleeved on the output section to seal the gap between the pump shell and the output section.

2. The booster pump for a water purifier according to claim 1, wherein The pump shell comprises a shell assembly, a front cover and a rear cover which are respectively arranged on two sides of the shell assembly, the rear cover is provided with a shaft seal chamber which faces the heat dissipation member, and the sealing member is fixed in the shaft seal chamber.

3. A booster pump for a water purification apparatus according to claim 2, wherein The through hole is arranged at the top of the shaft seal chamber, and the inner wall of the shaft seal chamber and the sealing member are in interference fit, transition fit or clearance fit to seal the output section and the shaft seal chamber.

4. The booster pump for a water purifier according to claim 3, wherein The output section is further provided with a bearing, the bearing is fixed below the shaft seal chamber, and the bearing cooperates with the shaft seal chamber to form a limiting part to limit the sealing member.

5. A booster pump for a water purification apparatus according to claim 4, wherein The shaft seal chamber is further provided with an elastic member, the elastic member comprises a gasket and a spring fixed above the gasket, the spring is arranged between the sealing member and the gasket, and the gasket is tightly attached to the upper surface of the bearing by the elastic force of the spring.

6. The booster pump for a water purifier according to any one of claims 2 to 5, wherein The sealing member comprises a support frame and an elastic rubber sleeved outside the support frame, the elastic rubber is provided with a sealing lip at the top, and the sealing lip is fixed below the through hole to realize elastic sealing between the output section and the elastic rubber.

7. A booster pump for a water purification apparatus according to claim 6, wherein The inner side of the elastic rubber is provided with lubricating grease, and the lubricating grease is attached to the surface of the output section when the output section cooperates with the sealing lip.

8. The booster pump for a water purifier according to claim 1, wherein The output section is provided with a fixed part, the fixed part is provided with axially distributed protruding structures, the middle part of the heat dissipation member is provided with a mounting hole, and the heat dissipation member penetrates into the output section through the mounting hole and is fixed to the protruding structures.

9. The booster pump for a water purifier according to claim 8, wherein The heat dissipation member comprises a fan blade and a mounting plate for fixing the fan blade, the fan blade faces the pump shell and is circumferentially distributed along the axis direction of the mounting hole.

10. The booster pump for a water purifier according to claim 1, wherein The output section extends to the outside of the mounting cavity, the end of the output section is provided with a connecting part, and the connecting part comprises a flexible shaft and a connector for connecting external equipment.

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