CN212106231U - Buffer device for booster pump, booster pump assembly with buffer device and water purifier - Google Patents

Abstract

The utility model provides a booster pump subassembly and purifier that is used for buffer of booster pump, has it. The buffering device comprises a shell and an elastic buffering part, the shell is provided with a water inlet, a water outlet and a built-in flow channel, the built-in flow channel is communicated between the water inlet and the water outlet, the elastic buffering part is arranged in the shell, at least one part of the elastic buffering part is made of elastic materials, the elastic buffering part is provided with a first deformation amount and a second deformation amount, the first deformation amount is smaller than the second deformation amount, the built-in flow channel is stopped when the elastic buffering part is provided with the first deformation amount, and the built-in flow channel is switched on when the elastic buffering part is provided with the. This buffer is connected to the booster pump delivery port when using, even if the impact of high-pressure rivers can be rebounded on the reverse osmosis membrane of fine and close like this, also can be because buffer's buffering can not directly strike high-speed operation's booster pump on, consequently effectively reduce the noise.

Description

Buffer device for booster pump, booster pump assembly with buffer device and water purifier

Technical Field

The utility model relates to a technical field of aqueous cleaning specifically, relates to a booster pump subassembly and purifier that is used for buffer of booster pump, has it.

Background

With the pursuit of the public on the quality of life, the water purifier gradually enters the families of people. The reverse osmosis membrane water purifier is more and more popular because the purified water produced by the reverse osmosis membrane water purifier is fresher, more sanitary and safer.

The reverse osmosis filter element is a core component of the reverse osmosis water purifier. The raw water is pressurized by the booster pump, and the high-pressure water is pumped into the reverse osmosis filter element, so that the pure water in the water flow can be separated from other substances. The raw water is filtered by the reverse osmosis membrane to generate pure water and concentrated water according to the proportion.

The high-pressure rivers that produce behind the booster pump pressure boost can produce great impact to pipeline and low reaches part, and this impact can lead to booster pump and pipeline vibration and produce great noise, probably drives the vibration of purifier complete machine even, leads to producing the noise that the user can't bear, and user experience is relatively poor.

SUMMERY OF THE UTILITY MODEL

In order to at least partially solve the problems occurring in the prior art, according to an aspect of the present invention, there is provided a buffer device for a booster pump. The buffering device comprises a shell and an elastic buffering part, the shell is provided with a water inlet, a water outlet and a built-in flow channel, the built-in flow channel is communicated between the water inlet and the water outlet, the elastic buffering part is arranged in the shell, at least one part of the elastic buffering part is made of elastic materials, the elastic buffering part is provided with a first deformation amount and a second deformation amount, the first deformation amount is smaller than the second deformation amount, the built-in flow channel is stopped when the elastic buffering part is provided with the first deformation amount, and the built-in flow channel is switched on when the elastic buffering part is provided with the.

This buffer is connected to the booster pump delivery port when using, like this, even the impact of high-pressure rivers can be by the bounce-back on the reverse osmosis membrane of fine and close, also can be because buffer's buffering can not directly strike high-speed operation's booster pump on, consequently can effectively reduce the noise. In addition, by arranging the buffer device, high-pressure water flow pumped by the booster pump can impact the elastic buffer part, and the elastic buffer part can shake in a certain range in the deformation direction of the elastic buffer part, so that the vibration frequency generated by water flow impact and pulsation is reduced, the vibration of the water flow is reduced, the vibration frequency of the water flow is not enough to cause the resonance of the booster pump and a pipeline, the vibration amplitude of the pipeline and the booster pump caused by the impact force can be reduced, the noise of the water purifier is effectively reduced, and the use experience of a user is better; meanwhile, when the booster pump does not work, the buffer device can also effectively prevent water flow which does not increase water pressure from passing through, and the effect of the stop valve is achieved.

Illustratively, a partition is arranged in the shell, the partition divides a first flow channel cavity and a second flow channel cavity in the shell, the first flow channel cavity and the second flow channel cavity are communicated above the partition, the first flow channel cavity is communicated with the water inlet, the second flow channel cavity is communicated with the water outlet, and the elastic buffer is positioned above the partition, wherein the elastic buffer is pressed against the partition when having a first deformation amount so as to seal the first flow channel cavity; and the elastomeric cushion is spaced apart from the divider when having the second deformation amount to place the first and second flow passage chambers in communication. Through setting up the separator, buffer's structure is comparatively simple, is convenient for realize ending and switch on built-in runner.

Exemplarily, the separator is the tubulose that extends from top to bottom, and the inside first flow path chamber that forms of the inside of separator, and the outside formation of separator's pipe becomes the flow path chamber, and the lower extreme intercommunication water inlet of separator, the upper end intercommunication of separator to the delivery port, and the elastic buffer sets up with the upper end of separator is relative. Therefore, the buffer device has the advantages of simple structure, easy processing and production, low cost and the like.

Illustratively, an annular boss protruding upwards is arranged on the upper end face of the separating piece, the annular boss extends along the inner periphery of the upper end face, and the outer diameter of the annular boss is smaller than that of the separating piece. Therefore, the contact area between the upper end of the separating piece and the elastic buffering piece can be reduced, gaps between the upper end of the separating piece and the elastic buffering piece due to manufacturing tolerance are effectively reduced, the possibility that the built-in flow channel is conducted when the elastic buffering piece has the first deformation is further reduced, and the yield of the mass production of the buffering device is high.

Illustratively, the shell comprises a base body and a cover body which are connected with each other, the buffering device further comprises an elastic diaphragm, the elastic diaphragm is clamped between the base body and the cover body to separate a water passing cavity and a buffering cavity which are not communicated with each other, the water inlet and the water outlet are arranged on the base body, the first flow channel cavity, the second flow channel cavity and the separating piece are arranged in the water passing cavity, the elastic buffering piece is arranged in the buffering cavity, and the elastic diaphragm is located between the elastic buffering piece and the separating piece. The water passing cavity and the buffer cavity are completely separated through the elastic diaphragm, so that the water tightness of the water passing cavity is favorably ensured, the elastic buffer member in the buffer cavity can be in a waterless environment, the structural aging caused by long-term soaking by water is prevented, and the service life of the elastic buffer member is effectively prolonged. In addition, the buffer device with the structure is easy to process and manufacture, has fewer water leakage points and higher yield.

Illustratively, the elastic diaphragm is in a hat shape, so that the middle area of the elastic diaphragm is provided with a groove, the groove is recessed into the water passing cavity, and the lower end of the elastic buffer piece is accommodated in the groove. Like this, set up the recess in the middle part of elastic diaphragm and be favorable to improving the portable scope of elastic diaphragm, that is to say, after elastic diaphragm is backed up by high-pressure rivers, can form enough wide rivers passageway between the upper end of elastic diaphragm and separator to guarantee rivers flux, avoid producing the resistance to high-pressure rivers.

Illustratively, the elastomeric cushion is cylindrical. Thus, the structure of the elastic buffer has the advantages of light weight, material saving, low cost and the like.

Illustratively, the outer circumferential surface of the elastomeric cushion is provided with a plurality of annular ribs arranged at intervals along an axial direction of the elastomeric cushion. Therefore, the elastic buffer part can keep the shape through the annular convex edge, and the elasticity of the elastic buffer part is increased through the position with smaller wall thickness, so that the elastic buffer part not only has larger elasticity, but also is easy to accurately control the buffer action on high-pressure water flow, and further reduces the noise; and after water pressure is removed, the elastic buffer piece can well recover the shape of the elastic buffer piece, and the phenomenon that the built-in runner is conducted when the elastic buffer piece has the first deformation is avoided.

Illustratively, the water inlet and outlet are disposed on the sides of the housing. The buffer device with the structure can reduce the overall dimension, so that the water purifier is smaller and more exquisite.

According to another aspect of the present invention, a booster pump assembly is provided. The booster pump assembly further comprises any one of the buffer device and the booster pump, and a water inlet of the buffer device is communicated to a water outlet of the booster pump. The booster pump assembly with the buffer device has the advantages that the impact caused by high-pressure water flow is reduced, and the noise is low.

According to another aspect of the utility model, a water purifier is provided. The water purifier also comprises the booster pump assembly, and a water outlet of the buffer device is communicated to a raw water inlet of the reverse osmosis filter element. The water purifier with the booster pump assembly has the advantages that impact caused by high-pressure water flow is reduced, and noise is low.

A series of concepts in a simplified form are introduced in the disclosure, which will be described in further detail in the detailed description section. The summary of the invention is not intended to identify key features or essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

The advantages and features of the present invention are described in detail below with reference to the accompanying drawings.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions thereof, which are used to explain the principles of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a perspective view of a cushioning device according to an exemplary embodiment of the present invention;

FIG. 2 is an exploded view of the cushioning device shown in FIG. 1;

FIG. 3 is a cross-sectional view of the cushioning device shown in FIG. 1, wherein the elastomeric cushioning member has a first amount of deformation; and

fig. 4 is a cross-sectional view of the cushioning device shown in fig. 1, wherein the elastomeric cushion has a second amount of deformation.

Wherein the figures include the following reference numerals:

100. a buffer device; 200. a housing; 201. a first flow channel cavity; 202. a second flow passage chamber; 210. a base body; 220. a cover body; 230. a water passing cavity; 240. a buffer chamber; 300. an elastic buffer member; 310. an annular rib; 410. a water inlet; 420. a water outlet; 430. a separator; 431. a lower end; 432. an upper end; 433. an annular boss; 440. a flow passage is arranged inside; 500. an elastic diaphragm; 510. and (4) a groove.

Detailed Description

In the following description, numerous details are provided to provide a thorough understanding of the present invention. One skilled in the art, however, will understand that the following description illustrates only a preferred embodiment of the invention and that the invention may be practiced without one or more of these details. In addition, some technical features that are well known in the art are not described in detail in order to avoid obscuring the present invention.

The reverse osmosis water purifier occupies a large market at present, and a booster pump and a reverse osmosis filter element are arranged in the water purifier. The booster pump may include one or a combination of various types of booster pumps known in the art or may come into existence in the future, as long as the pressurization of the raw water can be achieved. The booster pump can be used for with raw water pressure boost to in parts such as reverse osmosis filter core are gone into to the pump, and then filter raw water. The reverse osmosis cartridge may comprise a combination of one or more of various types of reverse osmosis cartridges known in the art or that may come into existence in the future, so long as the function thereof is achieved. The reverse osmosis filter element can comprise a filter element formed by a single reverse osmosis membrane and a composite filter element formed by compounding the reverse osmosis membrane and other filter materials.

The inventor finds that when the booster pump works, high-pressure water flow generated by the booster pump impacts a reverse osmosis membrane in the reverse osmosis filter element, the reverse osmosis membrane is compact, the high-pressure water flow can be rebounded when impacting the reverse osmosis membrane, and the rebounded high-pressure water flow can impact the booster pump running at a high speed, so that the booster pump and a pipeline section between the booster pump and the reverse osmosis filter element generate larger water flow oscillation, which is an important reason for generating larger noise. Therefore the utility model provides a buffer device, its booster pump delivery port of connecting at the booster pump can effectively avoid the high-pressure rivers striking high-speed moving booster pump that rebounds back. Further, the utility model also provides a booster pump subassembly, it includes the booster pump and is connected to the buffer of booster pump delivery port. Still further, a water purifier with the booster pump assembly is also provided, wherein the buffer device is connected between the booster pump and the reverse osmosis filter element.

Fig. 1-4 illustrate a damping device 100 according to an aspect of the present invention, wherein the arrows shown in fig. 3-4 schematically illustrate the direction of flow of water within the damping device 100.

The buffering device 100 may include a case 200 and an elastic buffer 300. The housing 200 may have a water inlet 410, a water outlet 420, and a built-in flow passage 440. The built-in flow passage 440 may communicate between the water inlet 410 and the water outlet 420. The positions of the water inlet 410, the water outlet 420 and the built-in flow passage 440 on the housing 200 may be arbitrary as long as the above requirements are satisfied.

The elastic buffer 300 may be disposed inside the case 200. At least a portion of the elastic buffer 300 may be made of an elastic material. That is, the elastic buffer 300 may be entirely made of an elastic material; or a portion of the elastomeric damper 300 may be elastomeric while another portion may be rigid. Preferably, the elastic buffer 300 may be made of rubber. The elastic buffer 300 may also employ a spring. The elastic buffer 300 may have a first deformation amount and a second deformation amount. The first amount of deformation may be less than the second amount of deformation. The first and second deformation amounts may be a compression amount or a tension amount. That is, when water impacts the damping device 100, in some embodiments, the elastomeric damper 300 may be compressed; in other embodiments, the elastomeric cushion 300 may also be stretched. In the embodiment where the first and second deformation amounts are compression amounts, the first deformation amount may be zero, or an arbitrary number. Or, it can be said, the elastomeric damper 300 is in a state of natural extension or is compressed a small amount when it has a first amount of deformation. In embodiments where the first and second deformation amounts are amounts of stretch, the first deformation amount may be zero, or any number of values. Or, it can be said that the elastic buffer 300 is in a state of natural extension or is stretched by a small amount when it has the first deformation amount. When the elastic buffer 300 has the first deformation amount, the elastic buffer 300 may close the built-in flow channel 440. That is, between the water inlet 410 and the water outlet 420 is cut off. The elastic buffer 300 may have a second variation to allow the built-in runner 440 to be turned on. That is, the water inlet 410 and the water outlet 420 communicate with each other. The difference in the first deformation amount less than the second deformation amount may be selected according to the actual structure.

The elastic buffer member 300 may be located inside the built-in flow channel 440 or outside the built-in flow channel 440, as long as it can have two states of turning on and off the built-in flow channel 440. Whether the elastomeric damper 300 is stretched or compressed as water flows through the damper device 100 depends on its installed position. One skilled in the art can select the location of the elastomeric damper 300 and the manner in which the elastomeric damper 300 deforms when water flows through the damping device 100 as desired.

A booster pump water outlet of the booster pump may be communicated to the water inlet 410 of the buffer device 100. The elastic buffer member 300 has a first amount of deformation when no water stream strikes the damping device 100. After the water purifier starts to produce water, the booster pump works, and high-pressure water flow generated by the booster pump is pumped into the buffer device 100 through a water outlet of the booster pump. The high-pressure water stream impinges on the elastic buffer 300, and the elastic buffer 300 exhibits the second deformation amount under the impact of the high-pressure water stream. When the elastic buffer 300 has the second deformation, the built-in flow channel 440 is turned on. The high pressure water stream may now enter the downstream components of the buffer device 100, such as the reverse osmosis cartridge, through the water outlet 420. Those skilled in the art can match the water pressure required for the elastomeric damper 300 to exhibit the second deformation according to the rated pressure of the booster pump.

Thus, even if the high-pressure water flow is rebounded by impact on the dense reverse osmosis membrane, the high-pressure water flow is not directly impacted on the booster pump which operates at a high speed by the buffer of the buffer device 100, and therefore, the noise can be effectively reduced. In addition, the high-pressure water flow pumped out by the booster pump has large impact force and has pulsation, the high-pressure water flow pumped out by the booster pump can impact the elastic buffer member 300 by arranging the buffer device 100, and the elastic buffer member 300 can shake in a certain range in the deformation direction of the elastic buffer member, so that the vibration frequency generated by the impact and the pulsation of the water flow is reduced, the vibration frequency of the water flow is not enough to cause the resonance of the booster pump and a pipeline, the vibration amplitude of the pipeline and the booster pump caused by the impact force can be reduced, the noise of the water purifier is effectively reduced, and the use experience of a user is good; meanwhile, when the booster pump does not work, the buffer device 100 can also effectively prevent water flow which does not increase water pressure from passing through, and the function of a stop valve is achieved.

Illustratively, as shown in fig. 3-4, a partition 430 may be disposed within the housing. The partition 430 partitions the first flow path chamber 201 and the second flow path chamber 202 within the housing. The first and second flow passage chambers 201 and 202 may communicate above the partition 430. The first flow path chamber 201 may communicate with the water inlet 410. The second fluid passage chamber 202 may communicate with the water outlet 420. The elastic buffer 300 may be located above the spacer 430. Wherein the elastic buffer member 300 can be pressed against the partitioning member 430 with a first deformation amount to seal the first flow path cavity 201; and the elastic buffer member 300 is spaced apart from the spacer 430 when having the second deformation amount to communicate the first and second flow path cavities 201 and 202.

The high pressure water flows sequentially through the water inlet 410 and the built-in flow passage 440, and the elastic buffer 300 may be compressed when it impacts on the elastic buffer 300. Specifically, when the elastic buffer member 300 has the first deformation amount, the elastic buffer member 300 may block the first flow channel cavity 201 to block the built-in flow channel 440. When the high-pressure water flow impacts the buffering device 100, the elastic buffer 300 is compressed to the second deformation amount, and the elastic buffer 300 can communicate the first flow channel cavity 201 and the second flow channel cavity 202, so that the built-in flow channel 440 is conducted. At this time, the high-pressure water flow may pass through the built-in flow passage 440 and the water outlet 420 in sequence. By providing the partition 430, the structure of the buffer device 100 is simple, and the built-in flow passage 440 is easily cut off and turned on.

Preferably, as shown in fig. 3 to 4, the partition 430 may have a tubular shape extending up and down. The inside of the tube of the partition 430 forms the first flow path chamber 201. The tube exterior of the partition 430 forms the second flow path chamber 202. The partition 430 may have a lower end 431 and an upper end 432. The lower end 431 of the partition 430 may communicate with the water inlet 410. An upper end 432 of the partition may communicate to the water outlet 420. The lower end 431 and the upper end 432 are the water inlet end and the water outlet end of the partition 430, respectively. The elastic buffer 300 may be disposed opposite to the upper end 432 of the partitioning member 430. Thus, the damping device 100 has the advantages of simple structure, easy manufacture, low cost, etc.

Preferably, as shown in fig. 3 to 4, an annular projection 433 may be provided on an end surface of the upper end 432 of the partition 430. An annular boss 433 may extend along the inner periphery of the end face of the upper end 432. The outer diameter of the annular boss 433 may be smaller than the outer diameter of the spacer 430. Thus, the contact area between the upper end 432 of the spacer 430 and the elastic buffer member 300 can be reduced, and the gap between the upper end 432 of the spacer 430 and the elastic buffer member 300 due to the manufacturing tolerance can be effectively reduced, so that the possibility of conduction of the built-in flow channel 440 when the elastic buffer member 300 has the first deformation amount can be reduced, and the yield of mass production of the buffer device 100 is high.

Preferably, as shown in fig. 3-4, the housing 200 may include a base 210 and a cover 220. The holder body 210 and the cover body 220 may be coupled to each other. In the embodiment shown in the drawings, the holder body 210 and the cover body 220 may be connected to each other by a screw connection. Thus, the base 210 and the cover 220 are convenient to mount and dismount, and convenient to produce and maintain. In an embodiment not shown in the figures, the base 210 and the cover 220 may also be connected to each other by other means, such as by gluing, snapping, welding, etc. Cushioning device 100 may also include an elastic membrane 500. Preferably, the elastic diaphragm 500 may be made of rubber. The elastic diaphragm 500 may be clamped between the holder body 210 and the cover body 220 to divide the space inside the housing 200 into the water passing chamber 230 and the buffer chamber 240, which are not communicated with each other. The volumes of the water passing chamber 230 and the buffer chamber 240 may be the same or different. The water inlet 410 and the water outlet 420 may be provided on the housing 210. The first runner chamber 201, the second runner chamber 202, and the partition 430 may be disposed in the water passing chamber 230. The elastomeric cushion 300 may be disposed within the cushion cavity 240. The elastic diaphragm 500 may be located between the elastic buffer 300 and the spacer 430. The edges of the elastic membrane 500 are fixed, but the middle portion of the elastic membrane 500 is protruded in the water flow direction after being impacted by the water pressure, so that the elastic membrane 500 is spaced apart from the upper end 432 of the partitioning member 430 and the water flow passes through.

The water passing cavity 230 and the buffering cavity 240 are completely separated by the elastic diaphragm 500, which is beneficial to ensuring the water tightness of the water passing cavity 230, and the elastic buffering member 300 in the buffering cavity 240 can be in a waterless environment, so that the structural aging caused by long-term soaking by water is prevented, and the service life of the elastic buffering member 300 is effectively prolonged. In addition, the buffer device 100 with the structure is easy to process and manufacture, has fewer water leakage points and has higher yield.

Further, as shown in fig. 3-4, the elastic septum 500 may be "hat" shaped such that a central region of the elastic septum 500 has a groove 510. The groove 510 may be recessed into the water passing chamber 230. The lower end of the elastic buffer 300 is received in the groove. Thus, providing the groove 510 in the middle of the elastic diaphragm 500 is advantageous to increase the movable range of the elastic diaphragm 500, that is, when the elastic diaphragm 500 is pushed open by the high-pressure water flow, the portion of the elastic diaphragm 500 forming the groove 510 may be recessed into the buffer chamber 240, thereby enabling a sufficiently wide water flow passage to be formed between the elastic diaphragm 500 and the upper end 432 of the partition 430 to ensure the water flow rate and avoid resistance to the high-pressure water flow.

Preferably, as shown in fig. 3-4, the elastomeric cushion 300 may be cylindrical. The spacer 430 may be disposed coaxially with the elastic buffer 300. Thus, the structure of the elastic buffer 300 has the advantages of light weight, material saving, low cost, etc.

Further, as shown in fig. 3 to 4, a plurality of annular ribs 310 may be provided on the outer circumferential surface of the elastic buffer member 300. The plurality of annular ribs 310 may be arranged at intervals along the axial direction of the elastic buffer 300. The plurality of annular ridges 310 may be the same or different sizes and may be spaced apart by the same or different distances. Thus, the elastomeric cushion 300 has a greater wall thickness at the annular ribs 310 and the elastomeric cushion 300 has a lesser wall thickness between adjacent annular ribs 310. Thus, the elastic buffer member 300 can maintain its shape by the annular rib 310, and the elasticity of the elastic buffer member 300 is increased by the position of smaller wall thickness, whereby the elastic buffer member 300 can have not only greater elasticity, but also easily and precisely control the buffering action for the high-pressure water flow, thereby further reducing noise; and after the water pressure is removed, the elastic buffer member 300 can be well restored to its shape, so as to avoid the conduction of the built-in flow channel 440 when the elastic buffer member 300 has the first deformation.

Preferably, as shown in fig. 1 to 4, the water inlet 410 and the water outlet 420 may be provided at the side of the housing 200. In the embodiment shown in the figures, the central axis of the water inlet 410 and the central axis of the water outlet 410 may be coaxial. In the embodiment not shown in the drawings, the central axis of the water inlet 410 and the central axis of the water outlet 410 may not be coaxial, and those skilled in the art can make reasonable selections according to the structure in the water purifier. When the built-in flow passage 440 is opened, the water flows along the zigzag water path in the shock absorber 100. The buffer device 100 with the structure can reduce the external dimension, thereby enabling the water purifier to be smaller and more exquisite.

According to another aspect of the utility model, still provide a booster pump subassembly. The booster pump assembly may include any of the buffer devices 100 and booster pumps described above. The water inlet 410 of the buffer device 100 may be communicated to a booster pump water outlet of the booster pump. The communication mode and distance between the water inlet 410 of the buffer device 100 and the booster pump water outlet of the booster pump can be any. Preferably, the water inlet 410 of the buffer device 100 is directly communicated with the booster pump water outlet of the booster pump or communicated with the booster pump water outlet through a straight pipe. Therefore, the water outlet of the booster pump and the water inlet 410 of the buffer device 100 of the booster pump do not have a bend, so that the problems that the pipeline vibrates and generates noise due to impact of high-pressure water flow on the pipeline when the high-pressure water flow passes through the bend are prevented, and the noise of the booster pump assembly is effectively reduced. The booster pump assembly having the damper device 100 has reduced shock due to high-pressure water flow and low noise.

According to another aspect of the utility model, still provide a purifier. The purifier can include reverse osmosis filter core and above-mentioned booster pump subassembly. The water outlet 420 of the buffer device 100 may be communicated to the raw water inlet of the reverse osmosis filter element. The water purifier with the booster pump assembly has the advantages that impact caused by high-pressure water flow is reduced, and noise is low.

In the description of the present invention, it is to be understood that the orientation or positional relationship indicated by the orientation words such as "front", "rear", "upper", "lower", "left", "right", "horizontal", "vertical", "horizontal" and "top", "bottom", etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner" and "outer" refer to the interior and exterior relative to the contours of the components themselves.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe the spatial relationship of one or more components or features shown in the figures to other components or features. It is to be understood that the spatially relative terms are intended to encompass not only the orientation of the component as depicted in the figures, but also different orientations of the component in use or operation. For example, if an element in the drawings is turned over in its entirety, the articles "over" or "on" other elements or features will include the articles "under" or "beneath" the other elements or features. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". Further, these components or features may also be positioned at various other angles (e.g., rotated 90 degrees or other angles), all of which are intended to be encompassed herein.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, elements, components, and/or combinations thereof, unless the context clearly indicates otherwise.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (11)

1. A buffer device for a booster pump, characterized in that the buffer device comprises a housing (200) and an elastic buffer member (300),

the shell is provided with a water inlet (410), a water outlet (420) and a built-in flow passage (440), the built-in flow passage is communicated between the water inlet and the water outlet, and

the elastic buffer member is arranged in the shell, at least one part of the elastic buffer member is made of elastic materials, the elastic buffer member is provided with a first deformation amount and a second deformation amount, the first deformation amount is smaller than the second deformation amount, the elastic buffer member is provided with the first deformation amount and enables the built-in runner to be cut off, and the elastic buffer member is provided with the second deformation amount and enables the built-in runner to be switched on.

2. A damper according to claim 1 wherein a partition (430) is provided within said housing (200), said partition dividing a first flow channel chamber (201) and a second flow channel chamber (202) within said housing, said first and second flow channel chambers communicating above said partition, said first flow channel chamber communicating with said water inlet, said second flow channel chamber communicating with said water outlet, said elastomeric damper being located above said partition, wherein said elastomeric damper bears against said partition when said first amount of deformation is present to seal said first flow channel chamber; and the elastomeric cushion is spaced apart from the divider when the elastomeric cushion has the second deformation amount to place the first and second flow passage cavities in communication.

3. The buffering device as claimed in claim 2, wherein the partitioning member (430) has a tubular shape extending up and down, the first flow passage chamber (201) is formed inside the tube of the partitioning member, the second flow passage chamber (202) is formed outside the tube of the partitioning member, the lower end (431) of the partitioning member communicates with the water inlet (410), the upper end (432) of the partitioning member communicates with the water outlet (420), and the elastic buffering member (300) is disposed opposite to the upper end of the partitioning member.

4. A fender according to claim 3 wherein the upper end face of the dividing member (430) is provided with an upwardly projecting annular boss (433) extending along the inner periphery of the upper end face, the outer diameter of the annular boss being less than the outer diameter of the dividing member.

5. The damping device according to claim 2, wherein said housing (200) comprises a base (210) and a cover (220) connected to each other, said damping device further comprising an elastic diaphragm (500) sandwiched between said base and said cover to separate a water passing cavity (230) and a damping cavity (240) which are not communicated with each other, said water inlet (410) and said water outlet (420) being provided on said base, said first flow passage cavity, said second flow passage cavity and said partition being provided in said water passing cavity, said elastic damping member (300) being provided in said damping cavity, said elastic diaphragm being located between said elastic damping member and said partition.

6. A damper device according to claim 5, characterised in that said elastic diaphragm (500) is "hat" shaped, so that the middle area of said elastic diaphragm has a recess (510) recessed into said water passing chamber (230), the lower end of said elastic damper being housed in said recess.

7. A damper device according to claim 5 in which the elastomeric damper (300) is cylindrical.

8. The damper device according to claim 7, wherein the elastomeric damper (300) is provided on an outer circumferential surface thereof with a plurality of annular ribs (310) arranged at intervals in an axial direction of the elastomeric damper.

9. A buffering arrangement according to claim 2, characterized in that the water inlet (410) and the water outlet (420) are arranged at the sides of the housing (200).

10. A booster pump assembly, characterized in that it further comprises a booster pump and a buffer device according to any of claims 1-9, the water inlet (410) of the buffer device being connected to a booster pump water outlet of the booster pump.

11. A water purifier including a reverse osmosis filter element, the water purifier further comprising a booster pump assembly as claimed in claim 10, the water outlet of the buffer being connected to a raw water inlet of the reverse osmosis filter element.

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