CN216440354U - Filter - Google Patents

Abstract

The utility model relates to a filter, which comprises a lower end part, an upper end part and a filter element hermetically fixed between the lower end part and the upper end part, wherein the lower end part is provided with a liquid inlet pipe and a liquid outlet pipe, the filter element comprises a support plate and a filter membrane hermetically fixed on two end faces of the support plate, the upstream surface of the filter membrane is communicated with the liquid inlet pipe, the support plate is provided with a filtrate discharge channel communicated with the downstream surface of the filter membrane, one end face of the lower end part facing the filter element is provided with a first storage tank communicated with the liquid inlet pipe, and a second storage tank communicated with the liquid outlet pipe and the filtrate discharge channel, the first storage tank and the second storage tank are hermetically spaced, the liquid outlet pipe is positioned on one side of the second storage tank, the height of the bottom of the second storage tank on the opposite side of the liquid outlet pipe is higher than that of the second storage tank on the side of the liquid outlet pipe, the function of guiding filtrate in the second storage tank towards the direction of the liquid outlet pipe can be realized, the discharge rate of the filtrate can be accelerated, and the residual amount of the filtrate in the second storage tank can be reduced, waste is reduced, and cost is reduced for users.

Description

Filter

Technical Field

The utility model relates to the technical field of filtration, in particular to a filter.

Background

Chinese patent CN101868293B discloses a filtering cartridge, which comprises an upper end cover, a lower end cover and a plurality of filtering units, wherein the lower end cover is provided with an inlet for feeding and an outlet for permeate, and the upper end cover is provided with a vent for exhausting.

When the filtering box body works, raw material liquid flows in from the inlet, the raw material liquid is filtered by the filtering unit, the obtained filtrate is discharged from the outlet, and bubbles in the box body are discharged from the air vent. The user discovers in the use that this filter cartridge body has the too big problem of feed liquid residual volume, and the filtrate volume that obtains promptly is small a lot than the raw materials liquid that lets in, and this feed liquid is the relevant fluid of medicine application usually, and the price is more expensive, and the residual volume is too big can cause bigger waste.

Therefore, further improvements to the structure of the filtration cartridge, particularly the structure of the lower end cap, are needed to reduce the material liquid residue and waste.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to provide a filter which can reduce the residue of the feed liquid by improving the structure of the lower end piece.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a filter, includes bottom end piece, upper end piece and the sealed filter element who is fixed in between the two, the bottom end piece has feed liquor pipe and drain pipe, filter element includes the backup pad and seals the filter membrane of being fixed in its both ends face, the upstream surface and the feed liquor pipe intercommunication of filter membrane, the backup pad has the filtrating discharge passage with the downstream surface intercommunication of filter membrane, the bottom end piece forms the first storage tank with feed liquor pipe intercommunication towards one end face of filter element, and the second storage tank that all communicates with drain pipe and filtrating discharge passage, first storage tank and sealed interval of second storage tank, the projection of filter membrane in vertical direction falls into first storage tank, the drain pipe is located one side of second storage tank, the tank bottom of second storage tank is located the height that the drain pipe opposite side is higher than it is located the height of drain pipe place side.

The application provides a filter, its lower terminal member forms the first storage tank with feed liquor pipe intercommunication towards filter element's an terminal surface, and the second storage tank that all communicates with drain pipe and filtrating escape canal, the drain pipe is located one side of second storage tank, and the tank bottom of second storage tank is located the height that highly is higher than its height that is located the drain pipe place side of drain pipe opposite side, can play the effect towards the drain pipe direction guide with the filtrating in the second storage tank, accelerate the discharge rate of filtrating, and reduce the amount of residue of filtrating in the second storage tank, reduce extravagantly, for user reduce cost.

Furthermore, the bottom of the second storage tank is inclined downwards from the side of the liquid outlet pipe to the side of the liquid outlet pipe, and the height of the whole bottom of the second storage tank in the vertical direction is lower than that of the bottom of the first storage tank.

The whole groove bottom of the second storage tank extends obliquely, so that the filtrate is better guided towards the liquid outlet pipe, and meanwhile, the volume of the second storage tank is reduced, and the residue of the filtrate in the second storage tank is further reduced; the whole bottom of the second storage tank is lower than that of the first storage tank, which is equivalent to adding a driving force to the fluid and is more beneficial to the filtrate to flow to the liquid outlet pipe and be discharged quickly.

Further, the cross-sectional area of the first reservoir is at least 3 times or more the cross-sectional area of the second reservoir.

The first storage tank is communicated with the liquid inlet pipe and is right opposite to the filter membrane, the area of the cross section of the first storage tank is more than 3 times that of the cross section of the second storage tank, the effects of increasing the area of the filter membrane and accelerating the filtering speed and the pollutant holding capacity are achieved, meanwhile, the area and the volume of the cross section of the second storage tank are reduced, and finally the effect of reducing residues is achieved.

Furthermore, one end face, facing the filter element, of the lower end piece is provided with a first annular sealing rib and a second sealing rib which is positioned inside the first annular sealing rib and two ends of the second sealing rib are connected with the inner wall of the first annular sealing rib into a whole, the second sealing rib and one part of the first annular sealing rib are surrounded to form a first storage tank, and the second sealing rib and the other part of the first annular sealing rib are surrounded to form a second storage tank;

one end face, facing the filter element, of the upper end piece is provided with a second annular sealing rib and a third sealing rib, wherein the position of the second annular sealing rib is opposite to that of the first annular sealing rib, the position of the third sealing rib is opposite to that of the second annular sealing rib, the third sealing rib is positioned in the second annular sealing rib, and two ends of the third sealing rib are connected with the inner wall of the second annular sealing rib into a whole;

the two end faces of the supporting plate are respectively provided with a third annular sealing rib and a fourth sealing rib, the third annular sealing rib is opposite to the first annular sealing rib, the fourth sealing rib is opposite to the second annular sealing rib, the fourth sealing rib is positioned in the third annular sealing rib, and the two ends of the fourth sealing rib are connected with the inner wall of the third annular sealing rib into a whole;

the filter elements are stacked in a sealing mode through a third annular sealing rib and a fourth sealing rib, and are in sealing connection with the first annular sealing rib and the second annular sealing rib of the lower end piece and the second annular sealing rib and the third annular sealing rib of the upper end piece through the third annular sealing rib and the fourth sealing rib.

Furthermore, the support plate is also provided with a liquid separating hole communicated with the liquid inlet pipe, the filter membrane is positioned in an area surrounded by the liquid separating hole, one part of the third annular sealing rib and the fourth sealing rib and is separated from the liquid separating hole, the fourth sealing rib and the other part of the third annular sealing rib are surrounded by a first through hole with a position just opposite to the second storage tank, the starting end of the filtrate discharge channel is communicated with the downstream surface of the filter membrane, and the tail end of the filtrate discharge channel is communicated with the first through hole.

The fourth sealing rib and the third annular sealing rib are partially surrounded to form a first through hole, the position of the first through hole is opposite to the second storage tank, and the first through hole is communicated with the filtrate discharge channel; in the filtering process, raw material liquid in the first storage tank is dispersed to the upstream surface of the filter membrane through the liquid separating holes, and clean filtrate obtained by filtering the filter membrane flows into the first through hole through the filtrate discharging channel, then is converged into the second storage tank, and finally is discharged through the liquid outlet pipe.

Furthermore, the starting end of the filtrate discharge channel is covered by the filter membrane, extends from the starting end towards the direction of the first through hole, and passes through the areas where the fourth sealing ribs on the two end surfaces of the support plate are located to the tail end; or, the two end faces of the supporting plate are also provided with spacing columns, and the spacing columns are located between the end parts of the filter membranes and the liquid separating holes.

The above-mentioned structural design of filtrating discharge passage ensures that all raw material liquid must permeate the filter membrane, become and can reach filtrating discharge passage after clean filtrating on the one hand, prevents that raw material liquid and clean filtrating from mixing, and on the other hand, the clean filtrating that arrives in the filtrating discharge passage can flow into in the first through-hole fast for the discharge of filtrating. The spacing column arranged at one end part of the filter membrane is used for spacing adjacent filter elements to form a gap, so that the raw material liquid can be rapidly dispersed to the upstream surface of the filter membrane through the liquid separation holes.

Further, the tank bottom of first storage tank is equipped with the via hole that is located the inboard of the sealed muscle of first annular, via hole and feed liquor pipe intercommunication, it is just right with the via hole that the branch liquid hole has at least part region, the filter membrane staggers with the via hole.

The bottom of the first storage tank is provided with a through hole communicated with the liquid inlet pipe, and the through hole is opposite to at least part of the area of the liquid separating hole, so that the raw material liquid can rapidly pass through the liquid separating hole and further be dispersed to the upstream surface of the filter membrane; and the purpose that filter membrane and via hole stagger is to avoid raw materials liquid directly to strike the filter membrane, plays the effect of protection filter membrane.

Furthermore, the through hole extends downwards to form a buffer groove, and the buffer groove is positioned below the bottom of the first storage tank and communicated with the liquid inlet pipe.

In the feed liquor that flows in by the feed liquor pipe at first got into the buffering recess, the velocity of flow descends to a certain extent, and feed liquor upwards flows again in the buffering recess, through the via hole, get into first storage tank, its in-process that upwards flows, the velocity of flow further descends, can reduce the impact effect to the filter element production, improves the holistic structural stability of filter.

Furthermore, the upper end part is provided with an exhaust pipe, the support plate is also provided with a second through hole which is positioned between the outer side of the filter membrane and the inner side of the third annular sealing rib, the second through hole and the first through hole are sealed and separated by a fourth sealing rib, and the second through hole is communicated with the exhaust pipe.

The second through hole is communicated with the exhaust pipe, and the bubbles on the upstream side of the filter membrane are gathered towards the position of the exhaust pipe and exhausted through the second through hole; meanwhile, the second through hole is sealed and separated from the first through hole, so that filtrate is prevented from leaking through the exhaust pipe.

Further, the exhaust pipe is positioned on the opposite side of the liquid inlet pipe and at the position with the highest height of the upper end piece in the vertical direction; the third sealing rib and one part of the second annular sealing rib are arranged in a surrounding mode to form a first area opposite to the first storage tank, the other part of the third sealing rib and the other part of the second annular sealing rib are arranged in a surrounding mode to form a second area opposite to the second storage tank, the first area and the second area are sealed and separated by the third sealing rib, a gas collection channel extends upwards from the position, close to the third sealing rib, in the first area to form a gas collection channel, and the gas collection channel enables the second through hole to be communicated with the exhaust pipe.

The position of the exhaust pipe is designed to make the air bubbles in the filter gather towards the position of the exhaust pipe as much as possible, and simultaneously, the exhaust rate of the air bubbles is accelerated. The gas collection channel is located in the first region of the upper end piece and extends upward to collect the bubbles inside the filter, i.e., the bubbles inside the filter are more likely to gather toward the gas collection channel and are finally discharged quickly.

In the filter provided by the utility model, one end face of the lower end piece facing the filter element is provided with a first storage tank communicated with the liquid inlet pipe and a second storage tank communicated with the liquid outlet pipe and the filtrate discharge channel, the liquid outlet pipe is positioned at one side of the second storage tank, and the height of the bottom of the second storage tank, which is positioned at the opposite side of the liquid outlet pipe, is higher than that of the bottom of the second storage tank, so that the effect of guiding the filtrate in the second storage tank towards the liquid outlet pipe can be achieved, the discharge rate of the filtrate is accelerated, the residual amount of the filtrate in the second storage tank is reduced, the waste is reduced, and the cost is reduced for users.

Drawings

The utility model will be further described with reference to the accompanying drawings in which:

FIG. 1 is a perspective view of a filter provided by the present invention;

FIG. 2 is a perspective view of the lower end piece of FIG. 1;

FIG. 3 is a cross-sectional view of the lower end piece of FIG. 1 taken along the mid-axis plane of the inlet pipe;

FIGS. 4 and 5 are perspective views of the upper end piece of FIG. 1 in two directions, respectively;

FIG. 6 is a cross-sectional view of the lower end piece of FIGS. 4 and 5 taken along a medial plane of the exhaust pipe;

FIGS. 7 and 8 are schematic structural views of the filter element of FIG. 1;

fig. 9 and 10 are schematic structural views of the support plate of fig. 7.

100-filter, 10-lower end piece, 11-first storage tank, 12-second storage tank, 13-first annular sealing rib, 14-second sealing rib, 15-liquid inlet pipe, 16-liquid outlet pipe, 17-via hole, 18-buffer groove, 20-upper end piece, 21-exhaust pipe, 22-second annular sealing rib, 23-third sealing rib, 24-first area, 25-second area, 26-gas collection channel, 30-filter element, 31-support plate, 32-filter membrane, 33-filtrate discharge channel, 34-third annular sealing rib, 35-fourth sealing rib, 36-first through hole, 37-liquid separation hole, 38-second through hole and 39-spacing column.

Detailed Description

In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the utility model will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.

As shown in fig. 1, a filter 100 includes a lower end member 10 having an inlet duct 15 and an outlet duct 16, an upper end member 20 having an outlet duct 21, and a filter element 30 sealingly fixed therebetween. The gas discharge pipe 21 is located at the opposite side of the liquid inlet pipe 15 where the height of the upper end member 20 in the vertical direction is highest, so that the bubbles inside the filter 100 are gathered toward the position of the gas discharge pipe 21 as much as possible, while also accelerating the discharge rate of the bubbles.

For example, the exhaust pipe 21 is provided at an approximately diagonal line of the liquid inlet pipe 15, while the upper end surface of the upper end member 20 has a height difference, and the exhaust pipe 21 is located at the highest vertical height.

It should be noted that the number of the filter elements 30 may be 1 or more, and the actual number may be adjusted according to the required filtering area, for example, the number of the filter elements 30 is 1, 2, 5, 8, 20, 26, etc.

As shown in fig. 7 to 8, the filter element 30 includes a support plate 31 and filter membranes 32 sealingly fixed to both end surfaces thereof, and after the filter element 30 is sealingly stacked between the lower end member 10 and the upper end member 20 to form the filter 100, the upstream surfaces of the filter membranes 32 communicate with the liquid inlet pipe 15, so that the raw material liquid introduced from the liquid inlet pipe 15 is dispersed to the upstream surfaces of the filter membranes 32, and then the filter membranes 32 trap contaminants such as viruses. The support plate 31 has a filtrate discharge passage 33 communicating with the downstream surface of the filter membrane 32, and the clean filtrate obtained by filtering the raw material liquid through the filter membrane 32 reaches the downstream surface of the filter membrane 32, is collected in the filtrate discharge passage 33, and then leaves the filter element 30 through the filtrate discharge passage 33.

Meanwhile, as shown in fig. 2 to 3, an end face of the lower end piece 10 facing the filter element 30 is formed with a first reservoir 11 communicating with the liquid inlet pipe 15 and a second reservoir 12 communicating with both the liquid outlet pipe 16 and the filtrate discharge channel 33, the first reservoir 11 and the second reservoir 12 are hermetically spaced, a projection of the filter membrane 32 in a vertical direction falls into the first reservoir 11, the liquid outlet pipe 16 is located on one side of the second reservoir 12, and a bottom of the second reservoir 12 is located on the opposite side of the liquid outlet pipe 16 at a higher height than that of the second reservoir 12 on the side where the liquid outlet pipe 16 is located. In the filtering process, the raw material liquid is introduced into the first storage tank 11 through the liquid inlet pipe 15, then gradually immerses the filter membrane 32 of each filter element 30 upwards through the first storage tank 11, impurities such as viruses and the like carried in the impurities are intercepted by the filter membrane 32, and the clean filtrate reaches the downstream surface of the filter membrane 32, converges into the filtrate discharge channel 33, leaves the filter element 30 through the filtrate discharge channel 33, flows into the second storage tank 12, and is finally discharged through the liquid outlet pipe 16. In the filter 100, the outlet pipe 16 is located at one side of the second storage tank 12, and the height of the bottom of the second storage tank 12, which is located at the opposite side of the outlet pipe 16, is higher than the height of the bottom of the second storage tank 12, which is located at the side of the outlet pipe 16, so that the filter can guide the filtrate in the second storage tank 12 towards the outlet pipe 16, accelerate the discharge rate of the filtrate, reduce the residual amount of the filtrate in the second storage tank 12, reduce waste, and reduce cost for users.

For example, it is preferable that the bottom of the second tank 12 is inclined downward from the side of the liquid outlet pipe 16 to the side of the liquid outlet pipe 16, and the height of the bottom of the second tank 12 as a whole in the vertical direction is lower than the height of the bottom of the first tank 11 in the vertical direction. The whole of the bottom of the second storage tank 11 extends obliquely, so that the filtrate is better guided towards the liquid outlet pipe 16, and the volume of the second storage tank 12 is reduced, so that the residue of the filtrate in the second storage tank 12 is reduced; the whole bottom of the second storage tank 12 is lower than that of the first storage tank 11, which is equivalent to adding an additional pushing force to the fluid and is more beneficial to the filtrate to flow to the liquid outlet pipe 16 and be discharged quickly.

Alternatively, in other embodiments, the cross-sectional area of the first reservoir 11 is at least 3 times greater than the cross-sectional area of the second reservoir 12. Because the first storage tank 11 is communicated with the liquid inlet pipe 15, and the projection of the filter membrane 32 in the vertical direction falls into the first storage tank 11, namely the first storage tank 11 is just opposite to the filter membrane 32, and the cross section area of the first storage tank is more than 3 times of that of the second storage tank 12, correspondingly, the area of the filter membrane 32 is increased, the filtering speed and the pollutant holding capacity are accelerated, meanwhile, the cross section area and the volume of the second storage tank 12 are also reduced, and finally, the residual effect is reduced.

Wherein the filter membrane 32 on each end face of the support plate 31 may be one or more layers. When the filter membrane 32 is a single layer, the upstream surface thereof refers to the surface of the single layer filter membrane 32 on the side facing away from the support plate 31, and the downstream surface is the surface of the single layer filter membrane 32 on the side facing the support plate 31. When the filter membranes 32 are multi-layered, the filtration accuracy of each layer of filter membranes 32 gradually increases from the position farthest from the support plate 31 toward the direction close to the end face of the support plate 31, or the filtration accuracy of each layer of filter membranes 32 may be the same. At this time, the upstream surface of the filter membrane 32 refers to the surface of the filter membrane 32, which is positioned on the outermost layer and is farthest from the end surface of the support plate 31, on the side away from the support plate 31; the downstream surface of the filter membrane 32 refers to the surface of the filter membrane 32 located on the innermost layer of the multi-layer filter membrane 32, which is in direct contact with the support plate 31, on the side facing the support plate 31.

More specifically, as shown in fig. 2 to 7, an end surface of the lower end piece 10 facing the filter element 30 has a first annular sealing rib 13, and a second sealing rib 14 located inside the first annular sealing rib 13 and having two ends integrally connected to an inner wall of the first annular sealing rib 13, wherein the second sealing rib 14 surrounds a portion of the first annular sealing rib 13 to form a first reservoir 11, and surrounds another portion of the first annular sealing rib 13 to form a second reservoir 12.

The end surface of the upper end piece 20 facing the filter element 30 is provided with a second annular sealing rib 22 opposite to the first annular sealing rib 13, and a third sealing rib 23 opposite to the second annular sealing rib 22, wherein the third sealing rib 23 is located inside the second annular sealing rib 22, and both ends of the third sealing rib are connected with the inner wall of the second annular sealing rib 22 into a whole.

The two end faces of the supporting plate 31 are provided with a third annular sealing rib 34 opposite to the first annular sealing rib 13 and a fourth sealing rib 35 opposite to the second annular sealing rib 14, the fourth sealing rib 35 is positioned inside the third annular sealing rib 34, and the two ends of the fourth sealing rib are connected with the inner wall of the third annular sealing rib 34 into a whole.

The filter elements 30 are stacked in a sealing manner through the third annular sealing rib 34 and the fourth sealing rib 35, and are in sealing connection with the first annular sealing rib 13 and the second annular sealing rib 14 of the lower end part 10, and the second annular sealing rib 22 and the third annular sealing rib 23 of the upper end part 20 through the third annular sealing rib 34 and the fourth sealing rib 35, so that the complete filter 100 is formed.

Generally, the third annular sealing rib 34 and the fourth sealing rib 35 of the support plate 31 are in sealing connection with the third annular sealing rib 34 and the fourth sealing rib 35 of the adjacent support plate 31 through welding; the third annular seal rib 34 and the fourth seal rib 35 of the support plate 31 are also welded to the first annular seal rib 13 and the second annular seal rib 14 of the lower end member 10 and the second annular seal rib 22 and the third annular seal rib 23 of the upper end member 20 to form a seal connection.

When the number of the filter elements 30 is 1, the 1 filter element 30 is directly connected with the first annular sealing rib 13 and the second annular sealing rib 14 of the lower end member 10 and the second annular sealing rib 22 and the third annular sealing rib 23 of the upper end member 20 in a sealing manner through the third annular sealing rib 34 and the fourth annular sealing rib 35 on the two end surfaces of the support plate 31, so as to form the filter 100 with only 1 filter element 30.

In other preferred embodiments, as shown in fig. 7-10, the support plate 31 further has a liquid separating hole 37 communicating with the liquid inlet pipe 15, the filter membrane 32 is located in the liquid separating hole 37, a region surrounded by a portion of the third annular sealing rib 34 and the fourth sealing rib 35, and is spaced from the liquid separating hole 37, the fourth sealing rib 35 and another portion of the third annular sealing rib 34 surround a first through hole 36 located opposite to the second reservoir 12, and the filtrate discharge passage 33 has a start end communicating with the downstream surface of the filter membrane 32 and a tail end communicating with the first through hole 36. Here, the first through hole 36 is aligned with the second reservoir 12 means that, when the filter element 30 is sealingly stacked between the lower end member 10 and the upper end member 20, the first through hole 36 is positioned directly above the second reservoir 12 and has the same cross-sectional area.

In the filtering process, the raw material liquid is introduced into the first storage tank 11 through the liquid inlet pipe 15, the liquid level of the raw material liquid in the filter 100 gradually rises and then is dispersed to the upstream surface of the filter membrane 32 through the liquid separating holes 37 of the support plates 31, impurities such as viruses contained in the impurities are intercepted by the filter membrane 32, the obtained clean filtrate enters the filtrate discharge channel 33, and the clean filtrate in the filtrate discharge channel 33 can further converge into the first through hole 36 and the second storage tank 12 and finally is discharged through the liquid outlet pipe 16 because the first through hole 36 is communicated with the tail end of the filtrate discharge channel 33 and the position of the first through hole is opposite to that of the second storage tank 12.

Further, the starting end of the filtrate discharge passage 33 is covered with the filter film 32, and extends from the starting end toward the first through hole 36 to the end through the area where the fourth sealing ribs 35 of both end faces of the support plate 31 are located. The above-mentioned structural design of the filtrate discharge channel 33 ensures that all the raw material liquid must penetrate through the filter membrane 32 and become clean filtrate before entering the filtrate discharge channel 33, so as to prevent the raw material liquid from mixing with the clean filtrate, and on the other hand, the clean filtrate in the filtrate discharge channel 33 can also flow into the first through hole 36 quickly, so as to accelerate the discharge of the filtrate.

Alternatively, in other embodiments, the support plate 31 is further provided with spacers 39 at both end surfaces thereof, and the spacers 39 are located between the ends of the filter membranes 32 and the separation holes 37. The spacer bars 39 serve to space adjacent filter elements 30 apart to form a gap for rapid dispersion of the feed solution from the dispensing holes 37 to the upstream surface of the filter membrane 32.

In another embodiment, as shown in fig. 2-3, the bottom of the first tank 11 is provided with a through hole 17 inside the first annular sealing rib 13, the through hole 17 is communicated with the liquid inlet pipe 15, the liquid separation hole 37 has at least a partial area opposite to the through hole 17, and the filter membrane 32 is offset from the through hole 17. Here, the fact that the dispensing hole 37 has at least a partial region thereof aligned with the through hole 17 means that after the lower end member 10, the filter element 30 and the upper end member 20 are sequentially formed into a sealed stack, the dispensing hole 37 of the support plate 31 has at least a partial region thereof aligned with the through hole 37 of the bottom of the first reservoir 11, so that the raw material liquid passing through the through hole 17 can rapidly flow through the dispensing hole 37 and then be dispersed to the upstream surface of the filter membrane 32. The purpose of staggering the filter membrane 32 from the via hole 17 is to prevent the raw material liquid from directly impacting the filter membrane 32, and thus the filter membrane 32 is protected.

Furthermore, a buffer groove 18 is formed by extending the through hole 17 downward, and the buffer groove 18 is located below the bottom of the first tank 11 and is communicated with the liquid inlet pipe 15. More specifically, the buffer groove 18 is located below the end of the via 17 and is integrated with the end of the via 17. The raw material liquid that flows in by feed liquor pipe 15 firstly gets into buffering recess 18 in, the velocity of flow descends to a certain extent, and raw material liquid upwards flows again in buffering recess 18, gets into first storage tank 11 through via hole 17 in, and its in-process that upwards flows, the velocity of flow further descends, can reduce the impact effect to filter element 30 production, improves the holistic structural stability of filter 100. Meanwhile, the starting end of the liquid inlet pipe 15 is connected with one end of the buffer groove 18 into a whole, the liquid inlet pipe 15 penetrates through the side wall of the lower end part 10 from the starting end and extends outwards to the tail end, namely the starting end of the liquid inlet pipe 15 is smoothly connected with one end of the buffer groove 18, so that the raw material liquid in the liquid inlet pipe 15 flows into the buffer groove 18 more smoothly, and bubbles formed by fluid impact can be reduced.

Or, preferably, the starting end of the via hole 17 is transitionally connected with the groove bottom of the first storage tank 11 through an arc surface, and extends downward from the tail end of the arc surface in an equal diameter manner to penetrate through the groove bottom of the first storage tank 11 to reach the tail end. Of course, the through hole 17 may also extend downward from the end of the arc surface to penetrate the bottom of the first reservoir 11 to the end. In addition, the end of the via hole 17 may be smoothly connected with the start end of the buffer groove 18, or may be transitionally connected with the inner wall of one or more sides thereof through a step surface.

In another embodiment, as shown in fig. 7 and 9, the supporting plate 31 further has a second through hole 38 located outside the filter membrane 32 and inside the third annular sealing rib 34, the second through hole 38 and the first through hole 36 are sealed and separated by a fourth sealing rib 35, that is, after the filter element 30 is sealed and stacked between the lower end member 10 and the upper end member 20, the second through hole 38 and the first through hole 36 are sealed and separated by the fourth sealing rib 35 and the second sealing rib 14 and the third sealing rib 23 due to the sealing connection of the fourth sealing rib 35 on the two end faces of the supporting plate 31, and the second through hole 38 is communicated with the exhaust pipe 21. The bubbles on the upstream side of the filter membrane 32 are collected toward the position of the exhaust pipe 21 through the second through hole 38 and discharged; at the same time, the second through hole 38 is sealed from the first through hole 36, preventing filtrate from leaking through the exhaust pipe 21.

In addition, as shown in fig. 4-6, in the upper end member 20, the third sealing rib 23 and a part of the second annular sealing rib 22 are arranged to enclose a first area 24 opposite to the first storage tank 11, and another part of the second annular sealing rib 22 is arranged to enclose a second area 25 opposite to the second storage tank 12, and the first area 24 and the second area 25 are sealed and separated by the third sealing rib 23, that is, after the filter element 30 is sealed and stacked between the lower end member 10 and the upper end member 20, the third sealing rib 23 is sealed and connected with the fourth sealing rib 35 of the support plate 31, so that the first area 24 and the second area 25 are sealed and separated; and the first area 24 is extended upward near the third sealing rib 23 to form a gas collecting channel 26, and the gas collecting channel 26 connects the second through hole 38 with the exhaust pipe 21. The air collecting channel 26 serves to collect the air bubbles inside the filter 100, i.e. the air bubbles inside the filter 100 are more easily collected toward the air collecting channel 26 and are finally quickly discharged through the air discharging pipe 26.

The first region 24 and the second region 25 are vertically opposite to the first reservoir 11 and the second reservoir 12, respectively, and the cross-sectional area of the first region 24 is equal to that of the first reservoir 11, and the cross-sectional area of the second region 25 is equal to that of the second reservoir 12.

Preferably, the beginning of the gas collecting channel 26 is connected to the surface of the first region 24 of the upper end piece 20 by a circular arc transition. And, it extends to the end from the terminal reducing of arc surface section upwards, namely from bottom to top, and the cross sectional area of gas collecting channel 26 reduces gradually, and it is favorable to the inside bubble of filter 100 to gather towards gas collecting channel 26 in, and then accelerates the discharge of bubble.

While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that various changes and modifications of the utility model can be effected therein by those skilled in the art after reading the above teachings of the utility model. Such equivalents are intended to fall within the scope of the claims appended hereto.

Claims (10)

1. A filter comprising a lower end piece, an upper end piece and a filter element sealingly secured therebetween, the lower end piece having a fluid inlet pipe and a fluid outlet pipe, the filter element comprising a support plate and a filter membrane sealingly secured to both end faces thereof, an upstream surface of the filter membrane being in communication with the fluid inlet pipe, the support plate having a filtrate discharge passage in communication with a downstream surface of the filter membrane, the filter comprising: lower extreme spare forms the first storage tank with feed liquor pipe intercommunication towards the terminal surface of filter element, and the second storage tank that all communicates with drain pipe and filtrating discharge channel, the sealed interval of first storage tank and second storage tank, the projection of filter membrane in vertical direction falls into first storage tank, the drain pipe is located one side of second storage tank, the tank bottom of second storage tank is located the height that highly is higher than it is located the drain pipe place side of drain pipe opposite side.

2. The filter of claim 1 wherein the floor of the second reservoir extends from the outlet to the side of the outlet obliquely downward from the opposite side of the outlet, the floor of the second reservoir having an overall vertical height that is less than the vertical height of the floor of the first reservoir.

3. A filter according to claim 1 or 2, wherein the cross-sectional area of the first reservoir is at least 3 times greater than the cross-sectional area of the second reservoir.

4. The filter of claim 1, wherein the end surface of the lower end piece facing the filter element is provided with a first annular sealing rib and a second sealing rib which is positioned inside the first annular sealing rib and is connected with the inner wall of the first annular sealing rib into a whole at two ends, the second sealing rib and one part of the first annular sealing rib surround to form a first storage tank, and the other part of the first annular sealing rib surround to form a second storage tank; one end face, facing the filter element, of the upper end piece is provided with a second annular sealing rib and a third sealing rib, wherein the position of the second annular sealing rib is opposite to that of the first annular sealing rib, the position of the third sealing rib is opposite to that of the second annular sealing rib, the third sealing rib is positioned in the second annular sealing rib, and two ends of the third sealing rib are connected with the inner wall of the second annular sealing rib into a whole;

the two end faces of the supporting plate are respectively provided with a third annular sealing rib and a fourth sealing rib, the third annular sealing rib is opposite to the first annular sealing rib, the fourth sealing rib is opposite to the second annular sealing rib, the fourth sealing rib is positioned in the third annular sealing rib, and the two ends of the fourth sealing rib are connected with the inner wall of the third annular sealing rib into a whole;

the filter elements are stacked through the third annular sealing rib and the fourth sealing rib in a sealing mode, and the third annular sealing rib and the fourth sealing rib are in sealing connection with the first annular sealing rib and the second annular sealing rib of the lower end piece, the second annular sealing rib of the upper end piece and the third annular sealing rib.

5. The filter of claim 4, wherein the support plate further comprises a liquid separation hole communicated with the liquid inlet pipe, the filter membrane is positioned in an area surrounded by the liquid separation hole, a part of the third annular sealing rib and the fourth sealing rib and is separated from the liquid separation hole, the fourth sealing rib and the other part of the third annular sealing rib surround a first through hole which is positioned opposite to the second storage tank, the starting end of the filtrate discharge channel is communicated with the downstream surface of the filter membrane, and the tail end of the filtrate discharge channel is communicated with the first through hole.

6. The filter according to claim 5, wherein the starting end of the filtrate discharge channel is covered with the filter membrane and extends from the starting end toward the first through hole to the end through the area where the fourth sealing ribs of the two end surfaces of the support plate are located; or, the two end faces of the supporting plate are also provided with spacing columns, and the spacing columns are located between the end parts of the filter membranes and the liquid separating holes.

7. The filter of claim 5, wherein the bottom of the first tank is provided with a through hole inside the first annular sealing rib, the through hole is communicated with the liquid inlet pipe, the liquid distribution hole has at least a partial area opposite to the through hole, and the filter membrane is staggered with the through hole.

8. The filter of claim 7, wherein the through hole extends downwards to form a buffer groove, and the buffer groove is positioned below the groove bottom of the first storage tank and is communicated with the liquid inlet pipe.

9. The filter of claim 5, wherein the upper end piece has an exhaust pipe, and the support plate further has a second through hole between the outside of the filter membrane and the inside of the third annular sealing rib, the second through hole being sealed from the first through hole by the fourth sealing rib, the second through hole communicating with the exhaust pipe.

10. The filter of claim 9, wherein the exhaust pipe is located at the opposite side of the liquid inlet pipe where the height of the upper end member in the vertical direction is highest; the third sealing rib and one part of the second annular sealing rib are arranged in a surrounding mode to form a first area opposite to the first storage tank, the other part of the third sealing rib and the other part of the second annular sealing rib are arranged in a surrounding mode to form a second area opposite to the second storage tank, the first area and the second area are sealed and separated by the third sealing rib, a gas collection channel extends upwards from the position, close to the third sealing rib, in the first area to form a gas collection channel, and the gas collection channel enables the second through hole to be communicated with the exhaust pipe.

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