CN110538501A - back-flushing prefilter and water purifier with same - Google Patents
back-flushing prefilter and water purifier with same Download PDFInfo
- Publication number
- CN110538501A CN110538501A CN201910918225.8A CN201910918225A CN110538501A CN 110538501 A CN110538501 A CN 110538501A CN 201910918225 A CN201910918225 A CN 201910918225A CN 110538501 A CN110538501 A CN 110538501A
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- Prior art keywords
- framework
- backwashing
- filter
- sealing
- bottle body
- Prior art date
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000011045 prefiltration Methods 0.000 title claims abstract description 60
- 238000011010 flushing procedure Methods 0.000 title description 7
- 238000011001 backwashing Methods 0.000 claims abstract description 77
- 238000006243 chemical reaction Methods 0.000 claims abstract description 24
- 238000004140 cleaning Methods 0.000 claims abstract description 22
- 238000000746 purification Methods 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000007789 sealing Methods 0.000 claims description 60
- 230000013011 mating Effects 0.000 claims description 17
- 238000007790 scraping Methods 0.000 claims description 15
- 241000271510 Agkistrodon contortrix Species 0.000 claims description 13
- 239000007787 solid Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 19
- 238000005406 washing Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 4
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 241000243686 Eisenia fetida Species 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/31—Self-supporting filtering elements
- B01D29/33—Self-supporting filtering elements arranged for inward flow filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6407—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes
- B01D29/6415—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element brushes with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/64—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element
- B01D29/6469—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers
- B01D29/6476—Regenerating the filter material in the filter by scrapers, brushes, nozzles, or the like, acting on the cake side of the filtering element scrapers with a rotary movement with respect to the filtering element
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
- B01D29/68—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps with backwash arms, shoes or nozzles
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtration Of Liquid (AREA)
Abstract
the invention provides a backwash pre-filter and a water purifier with the same, wherein the backwash pre-filter comprises: a bottle body; an exoskeleton disposed within the bottle; the inner framework is arranged in the outer framework and can move along the axial direction of the outer framework, a filter screen is arranged on the inner framework, a guide disc is arranged at the bottom of the inner framework, and a notch for cleaning water to pass through is formed in the guide disc; the outer edge of the guide disc is in sliding seal with the outer framework; the central tube is sleeved in the inner framework and is fixed relative to the bottle body, and one end of the central tube is closed; the spring is arranged in the guide sleeve and can drive the inner framework to move along the axial direction of the outer framework; and the back washing conversion part is arranged on the inner framework and is used for switching a water purification state and a back washing state in the process that the inner framework moves along the axial direction of the outer framework. The backwashing prefilter provided by the invention ensures the cleaning effect and avoids the invalidation of the backwashing function.
Description
Technical Field
the invention relates to the technical field of water purification equipment, in particular to a backwashing prefilter and a water purifier with the backwashing prefilter.
Background
The pre-filter is the first coarse filter for the whole water, and can filter silt, rust and large particles in tap water. Usually, the water meter is arranged behind a water inlet pipeline water meter so as to ensure that a large amount of precipitated impurities generated in a pipe network cannot cause harm to a human body and play an active role in protecting hidden laying pipelines, taps, electric appliances and the like.
currently, there are types of pre-filters, namely, positive flush pre-filters, siphon pre-filters and backwash pre-filters.
As shown in fig. 1 and 2, the positive-flushing prefilter is composed of a large copper body 4, a filter screen 1, a transparent cylinder 2, a drain ball valve 3, and the like. In the filtering state, tap water enters the filter from the water inlet a, passes through the filter screen and then flows out from the water outlet b. Particle impurities such as silt, rust, red worms and the like can be intercepted by the filter screen 1 and adhered to the surface of the filter screen 1 or deposited at the bottom of the transparent cylinder 2, thereby achieving the filtering effect. In the flushing state, the drain ball valve 3 at the bottom of the filter is opened, and the tap water flow flushes the surface of the filter net 1, and the dirt adhered to the surface of the filter net 1 and deposited in the transparent cylinder 2 is discharged from the drain ball valve. However, the forward filter is washed, so that dirt attached to the filter screen is difficult to wash away, and the cleaning effect is poor.
In the siphon prefilter, negative pressure formed when the drain ball valve is opened is utilized, and the negative pressure acts on the filter screen through a structural member, so that dirt attached to the filter screen is sucked into the sewage discharge channel and then discharged from the drain ball valve. However, the siphon prefilter is prone to accumulate particulate dirt in the bottle body, and the cleaning effect is not good.
in the backwashing prefilter, when the ball valve is opened, the structural member moves up and down by using water pressure to switch water flow, so that backwashing is realized. Although the dirt is easily washed away by the backwashing prefilter, the dirt is easily accumulated on the backwashing passageway due to improper operation, so that blockage is caused and the backwashing function is lost.
Therefore, how to ensure the cleaning effect and avoid the failure of the back washing function has become a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of this, the present invention provides a backwash pre-filter to ensure the cleaning effect and avoid the backwash function failure. The invention also provides a water purifier.
the utility model provides a leading filter of back flush, includes the bottle, still includes:
an exoskeleton disposed within the bottle;
the inner framework is arranged in the outer framework and can move along the axial direction of the outer framework, a filter screen is arranged on the inner framework, a guide disc is arranged at the bottom of the inner framework, and a notch for cleaning water to pass through is formed in the guide disc; the outer edge of the guide disc is in sliding seal with the outer framework;
the central tube is sleeved in the inner framework and is fixed relative to the bottle body, and one end of the central tube is closed;
The spring is arranged in the guide sleeve and can drive the inner framework to move along the axial direction of the outer framework;
And the back washing conversion part is arranged on the inner framework and is used for switching a water purification state and a back washing state in the process that the inner framework moves along the axial direction of the outer framework.
optionally, in the backwash pre-filter, a guide sleeve is arranged in the inner frame, and a positioning surface is arranged in the guide sleeve;
The central pipe comprises a backwashing section with a backwashing opening and a guide section sleeved in the guide sleeve, and one end of the guide section, which is far away from the backwashing section, is sealed;
The anti-washing device further comprises a sliding sealing structure positioned between the back washing opening and the spring, one end of the spring is relatively fixed with the central pipe, and the other end of the spring is abutted to the positioning surface; the sliding seal structure seals the guide sleeve and the guide section in a sliding manner.
optionally, in the backwash pre-filter, an annular protrusion is arranged in the guide sleeve, and a surface of the annular protrusion facing the spring is the positioning surface;
The outer wall of the central tube is provided with a limiting surface facing the annular bulge, and one surface of the annular bulge, which is far away from the spring, can be in limiting contact with the limiting surface.
optionally, in the backwash pre-filter, the guide sleeve is connected to the bottom of the inner frame, and a flow passage through which water flows is provided between an outer wall of the guide sleeve and an inner wall of the inner frame.
optionally, in the backwash pre-filter, the sliding seal structure is a central pipe O-ring sleeved on an outer wall of the central pipe.
Optionally, in the backwash pre-filter described above,
the outer edge of the guide disc and the outer framework are in sliding seal through gaskets;
and/or an outer framework O-shaped ring for sealing the outer framework and the bottle body is arranged between the outer framework and the bottle body;
And/or an inner framework O-shaped ring for sealing the inner framework and the filter screen is arranged between the inner framework and the filter screen;
And/or a copper head O-shaped ring for sealing the copper head structure of the bottle body and the central tube is arranged between the copper head structure of the bottle body and the central tube.
optionally, in the backwash pre-filter, a central tube fixing piece is fixedly arranged in the bottle body;
and one end of the guide section, which is far away from the backwashing section, is connected with the central pipe fixing piece through a central pipe fixing screw.
optionally, in the backwash pre-filter, the outer frame is provided with a scraping strip and an extending component for driving the outer frame to rotate;
The scraping strip is provided with a scraping blade in contact with the inner surface of the bottle body and/or a scraping brush in contact with the filter screen.
Optionally, in the backwash pre-filter, a central pipe O-ring for sealing the central pipe and the inner framework is arranged between the central pipe and the inner framework;
the central pipe positioned on one side of the central pipe O-shaped ring is provided with a back washing inlet, and the other side of the central pipe O-shaped ring is a solid surface without the back washing opening;
The back washing conversion piece is provided with a conversion piece opening part;
when the water purification state is carried out, the opening part of the conversion part is correspondingly sealed with the solid surface; and in the back washing state, the opening part of the conversion part is correspondingly communicated with the back washing inlet.
optionally, in the backwash pre-filter, one side of the outer framework facing the water inlet of the bottle body is provided with a first matching sealing surface;
The backwashing conversion piece is provided with a second matching sealing surface, and the first matching sealing surface and the second matching sealing surface are matched and sealed in a backwashing state.
The invention also provides a water purifier, which comprises a backwashing prefilter, wherein the backwashing prefilter is any one of the backwashing prefilters.
According to the technical scheme, the backwashing prefilter provided by the invention can switch the water purification state and the backwashing state through the backwashing conversion part, so that the cleaning effect is effectively ensured; and the bottom of the inner framework is provided with a guide disc, the guide disc is provided with a notch for cleaning water to pass through, the outer edge of the guide disc and the outer framework are in sliding seal, when in a backwashing state, the cleaning water for cleaning the filter screen flows out from the notch on the guide disc when reaching the bottom of the inner framework, so that the condition that particles enter from a gap between the inner framework and the outer framework to form particle accumulation is prevented, a spring can drive the inner framework to move along the axial direction of the outer framework under the action of water pressure, and the backwashing conversion part switches a water purification state and a backwashing state in the process that the inner framework moves along the axial direction of the outer framework, thereby effectively avoiding the accumulation of dirty objects on a backwashing water flow channel, avoiding the occurrence of a blockage problem and avoiding the failure of a backwashing function.
The invention also provides a water purifier, and as the backwashing prefilter has the technical effects, the water purifier with the backwashing prefilter also has the same technical effects, and the technical effects are not repeated.
drawings
in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a pre-filter in a prior art for purifying water;
FIG. 2 is a schematic view of a pre-filter cleaning state in the prior art;
FIG. 3 is a schematic side cross-sectional view of a backwash pre-filter provided by the present invention;
FIG. 4 is a first schematic view in elevation, in cross-section, of a backflush pre-filter provided by the present invention;
FIG. 5 is a second schematic view in elevation cross section of a backflush prefilter provided by the present invention;
FIG. 6 is a schematic view of a backwashing state of the backwashing pre-filter provided by the present invention;
FIG. 7 is a schematic view of the water purification state of the backwash pre-filter provided by the present invention;
FIG. 8 is a schematic structural view of an exoskeleton provided by the present invention;
FIG. 9 is a schematic structural view of an endoskeleton provided by the present invention;
FIG. 10 is a schematic structural view of a backwash switch provided in the present invention;
FIG. 11 is a schematic structural view of a center tube provided by the present invention;
Fig. 12 is a schematic structural view of the wiper strip provided in the present invention.
Detailed Description
the invention discloses a backwashing prefilter, which is used for ensuring the cleaning effect and avoiding the invalidation of the backwashing function. The invention also provides a water purifier.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 3 to 12, an embodiment of the present invention provides a backwash pre-filter, which includes a bottle body 1, an outer frame 2, a backwash conversion member 5, a filter screen 7, an inner frame 8, a central tube 10 and a spring 12. The outer framework 2 is arranged in the bottle body 1; the inner framework 8 is arranged in the outer framework 2 and can move along the axial direction of the outer framework 2, the inner framework 8 is provided with a filter screen 7, the bottom of the inner framework 8 is provided with a guide disc, and the guide disc is provided with a notch 804 for cleaning water to pass through; the outer edge of the guide disc is in sliding seal with the outer framework 2; the central tube 10 is sleeved in the inner framework 8 and is fixed relative to the bottle body 1, and one end of the central tube 10 is closed; the spring 12 is arranged in the guide sleeve 808 and can drive the inner framework 8 to move along the axial direction of the outer framework 2; the backwash conversion member 5 is provided on the inner frame 8, and switches between a water purification state and a backwash state in the process of the inner frame 8 moving in the axial direction of the outer frame 2.
the backwashing prefilter provided by the embodiment of the invention can switch the water purification state and the backwashing state through the backwashing conversion part 5, thereby effectively ensuring the cleaning effect; and, the bottom of the inner frame 8 has guiding discs, there are notches 804 for washing water to pass through on the guiding disc, the outer edge of the guiding disc and outer skeleton 2 are sealed slidably, while in the back flush state, the washing water of washing the filter screen 7 flows out by the notch 804 on the guiding disc when reaching the bottom of the inner frame 8, have prevented the granule from entering and forming the situation that the granule is piled up from the space between outer skeleton 2 and the inner skeleton 8, guarantee the spring 12 can drive the axial displacement of the inner frame 8 along the outer skeleton 2 under the function of water pressure, the back flush switching member 5 switches over the water purification state and back flush state in the course of the axial displacement of the inner frame 8 along the outer skeleton 2, have effectively avoided the dirty things to pile up on the water flow path of the back flush, avoid the emergence of the problem of blocking, avoid the inefficacy of the back.
It will be appreciated that the gap 804 communicates with the cleaning water outlet of the bottle 1 and the first water flow path formed between the inner frame 8 and the outer frame 2. At the initial stage of switching to the backwashing state, the external water source reaches the upper surface 807 of the guide disc opposite to the cleaning water outlet, and passes through the gap 804, and under the action of the water pressure, the inner framework 8 is driven to move downwards against the elastic force of the spring 12, and the backwashing converter 5 is driven to move along the axial direction of the outer framework 2 and is switched to the backwashing state.
In this embodiment, the inner frame 8 is preferably screwed to the backwash transformer 5. Inner frame 8 has an external thread structure 801 and backwash conversion member 5 has an internal thread structure 501 threadedly engaged with external thread structure 801.
In this embodiment, the inner frame 8 has a guide sleeve 808 therein, and the guide sleeve 808 has a positioning surface 805 therein; the central tube 10 comprises a back washing section with a back washing opening and a guide section sleeved in the guide sleeve 808, and one end of the guide section far away from the back washing section is sealed; the backwashing pre-filter also comprises a sliding sealing structure 11 positioned between the backwashing opening and a spring 12, one end of the spring 12 is relatively fixed with the central tube 10, and the other end of the spring 12 is propped against the positioning surface 805; the sliding seal structure 11 slidably seals the guide sleeve 808 with the guide section. Through the arrangement, the spring 12 is positioned in the guide sleeve 808, the spring 12 is always kept in a vertical state with the water pressure of backwashing, the phenomenon that the spring 12 is inclined to cause blocking due to overlarge water pressure is prevented, the phenomenon that the spring 12 cannot rebound is avoided, and the failure of the backwashing function is further avoided.
In order to play a limiting role, an annular bulge is arranged in the guide sleeve 808, and one surface of the annular bulge facing the spring 12 is a positioning surface 805; the outer wall of the central tube 10 has a limiting surface facing the annular protrusion, and the surface of the annular protrusion far away from the spring 12 can be in limiting contact with the limiting surface. After a cleaning water outlet is opened, the inner framework 8 overcomes the elasticity of the spring 12 to move downwards under the action of water pressure, and the limiting surface of the central pipe 10 is far away from the annular bulge to finish backwashing; after the cleaning water outlet is closed, the inner framework 8 moves upwards under the action of the elastic restoring force of the spring 12, and the limiting surface is in limiting contact with one surface of the annular bulge, which is far away from the spring 12, so that the inner framework 8 is determined to move in place along the axial direction of the outer framework 2. Through the arrangement, the control accuracy is effectively improved.
the guide sleeve 808 is connected with the bottom of the inner framework 8, and a flow passage for water flow to pass through is arranged between the outer wall of the guide sleeve 808 and the inner wall of the inner framework 8. That is, in this embodiment, a second water flow channel is formed between the outer wall of the guide sleeve 808 and the inner wall of the inner frame 8, and the first water flow channel and the second water flow channel are connected through the screen 7. Through the arrangement, the guide sleeve 808 is completely positioned in the inner framework 8, so that the arrangement area of the filter screen 7 is increased as much as possible. The guide sleeve 808 may also be located partially or completely outside the endoskeleton 8.
In this embodiment, the sliding seal structure 11 is a center tube O-ring sleeved on the outer wall of the center tube 10. Packing seals and the like may also be employed.
further, a sliding sealing ring groove 1003 is arranged on the center tube 10, and a center tube O-ring is positioned in the sliding sealing ring groove 1003.
preferably, in this embodiment, the outer edge of the guide disc is in sliding sealing with the exoskeleton 2 via a gasket 13. Wherein, the inner frame 8 is provided with a gasket sealing ring groove 803, and the gasket 13 is positioned in the gasket sealing ring groove 803.
preferably, in this embodiment, an exoskeleton O-ring 3 is provided between the exoskeleton 2 and the bottle body 1 for sealing the exoskeleton. Wherein, the outer framework 2 is provided with an outer framework groove 201, and the outer framework O-shaped ring 3 is positioned in the outer framework groove 201.
Preferably, in the present embodiment, an inner frame O-ring 9 is provided between the inner frame 8 and the filter screen 7 for sealing the two. Wherein, be provided with inner frame sealed ring channel 802 on the inner frame 8, inner frame O type circle 9 is located inner frame sealed ring channel 802.
Preferably, in this embodiment, the copper head structure of the bottle body 1 and the central tube 10 have a copper head O-ring therebetween for sealing. Wherein, be provided with copper head sealing ring channel 1001 on the center tube 10, copper head O type circle is located copper head sealing ring channel 1001.
in this embodiment, a central tube fixing member 14 is fixedly provided in the bottle body 1; the end of the guide section far away from the back washing section is connected with a central pipe fixing part 14 through a central pipe fixing screw 15. With the above arrangement, a structural operation in which one end of the center tube 10 is closed is achieved.
in order to improve the cleaning and water purifying effects, the outer framework 2 is provided with a scraping strip 4 and an extending part 16 which drives the outer framework 2 to rotate; the scraping strip 4 has a scraping blade 401 in contact with the inner surface of the bottle body 1 and/or a scraping brush in contact with the screen 7. In this embodiment, the wiper strip 4 has a wiper blade 401 in contact with the inner surface of the bottle body 1 and a wiper brush in contact with the screen 7. When the outer extension part 16 rotates, the outer frame 2 rotates along with the outer extension part, and then the scraping blade 401 of the scraping strip 4 is driven to hang the dirt on the inner surface of the bottle body 1, and the scraping brush is also driven to hang the dirt on the filter screen 7.
in this embodiment, the lower end of the flask 1 is provided with an outer sealing member 16 and an inner sealing member 18 fitted into the outer sealing member 16. The outer and inner sealing members 16 and 18 are provided at their lower ends with a drain valve 20 for controlling the opening and closing of the washing water outlet. The upper end of the outer sealing element 16 is clamped with the outer framework 2, and the lower end of the inner sealing element 18 is in threaded connection with the drain valve 20 (other ways such as clamping or hoop connection can also be adopted). Wherein, an outer sealing piece O-shaped ring 17 is arranged between the outer sealing piece 16 and the bottle body 1, and an inner sealing piece O-shaped ring 19 is arranged between the outer sealing piece 16 and the inner sealing piece 18.
The drain valve 20 is preferably a ball valve.
In this embodiment, the outer frame 2 is provided with a groove 202 for mounting the wiper strip 4. Preferably, the number of the grooves 202 is two and the grooves are symmetrically arranged on the outer frame 2, so that the two wiper strips 4 are symmetrically arranged.
preferably, a center pipe O-ring 6 is arranged between the center pipe 10 and the inner skeleton 8 for sealing the two; a back washing inlet 1005 is arranged on the central pipe 10 positioned on one side of the central pipe O-shaped ring 6, and the other side of the central pipe O-shaped ring is a solid surface without a back washing opening; the backwash conversion member 5 has a conversion member opening; when the water is purified, the opening part of the conversion part is correspondingly sealed with the solid surface; in the back flush state, the switch opening communicates with the back flush inlet 1005.
wherein, a central tube sealing ring groove 1002 is arranged on the central tube 10, and the copper head O-shaped ring is positioned in the copper head sealing ring groove 1001.
in the embodiment of the backwashing prefilter provided by the invention, one side of the outer framework 2 facing the water inlet of the bottle body 1 is provided with a first matching sealing surface 203; backwash conversion member 5 has a second mating sealing surface 502 and first mating sealing surface 203 is in a mating sealing relationship with second mating sealing surface 502 in the backwash state. That is, in the back flushing state, the first mating sealing surface 203 and the second mating sealing surface 502 are in mating sealing, so that a water flow isolating effect is achieved, a large amount of water is prevented from flowing through a gap between the first mating sealing surface and the second mating sealing surface during back flushing, and the back flushing effect is ensured; the external water flows into the central tube 10 through the conversion part opening part of the backwash conversion part 5 and the backwash inlet 1005, flows out through the backwash opening, sequentially passes through the inner frame 8 and the filter screen 7, and flows out to the cleaning water outlet through the notch 804. In a water purification state, the first mating sealing surface 203 is separated from the second mating sealing surface 502, so that external water flows through an opening between the first mating sealing surface 203 and the second mating sealing surface 502 to enter the first water flow channel, then enters the inner frame 8 through the filter screen 7, then enters the center tube 10 through the backwashing opening, and flows out through a purified water outlet.
it can be understood that the washing water outlet is provided with a drain valve 20 capable of controlling the opening and closing of the washing water outlet, the drain valve 20 is provided with a drain knob 21, and the drain valve 20 controls the opening and closing of the washing water outlet by the rotation of the drain knob 21. The drain knob 21 is mounted on the valve body of the drain valve 20 by a knob fixing screw.
The top periphery of the central tube 10 is provided with a positioning protrusion 1004, and the positioning protrusion 1004 is in concave-convex fit with the inner wall structure of the bottle body 1 to play a role in positioning the central tube 10. In the water purification state, the upper surface 806 of the inner frame 8 contacts with the lower surface of the positioning protrusion 1004 of the central rod 10, and the positioning effect is improved.
The embodiment of the invention also provides the water purifier which comprises the backwashing prefilter, wherein the backwashing prefilter is any one of the backwashing prefilters. Since the backwash pre-filter has the technical effects, the water purifier with the backwash pre-filter also has the same technical effects, and the technical effects are not repeated.
The backwash pre-filter provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (11)
1. The utility model provides a leading filter of back flush, includes bottle (1), its characterized in that still includes:
an outer skeleton (2) arranged in the bottle body (1);
The inner framework (8) is arranged in the outer framework (2) and can move along the axial direction of the outer framework (2), a filter screen (7) is arranged on the inner framework (8), a guide disc is arranged at the bottom of the inner framework (8), and a notch (804) for cleaning water to pass through is formed in the guide disc; the outer edge of the guide disc is in sliding seal with the outer framework (2);
The central tube (10) is sleeved in the inner framework (8) and is fixed relative to the bottle body (1), and one end of the central tube (10) is closed;
The spring (12) is arranged in the guide sleeve (808) and can drive the inner framework (8) to move along the axial direction of the outer framework (2);
and the backwashing conversion part (5) is arranged on the inner framework (8) and is used for switching a water purification state and a backwashing state in the process that the inner framework (8) moves along the axial direction of the outer framework (2).
2. The backflushing prefilter according to claim 1 wherein said inner frame (8) has a guide sleeve (808) therein, said guide sleeve (808) having a locating surface (805) therein;
The central pipe (10) comprises a backwashing section with a backwashing opening and a guide section sleeved in the guide sleeve (808), and one end of the guide section, which is far away from the backwashing section, is sealed;
The device also comprises a sliding sealing structure (11) positioned between the backwashing opening and the spring (12), one end of the spring (12) is relatively fixed with the central pipe (10), and the other end of the spring (12) is abutted against the positioning surface (805); the sliding sealing structure (11) seals the guide sleeve (808) and the guide section in a sliding manner.
3. The backwash prefilter according to claim 2 wherein said guide sleeve (808) has an annular projection therein, said annular projection facing said spring (12) having said locating surface (805) on a side thereof;
the outer wall of the central tube (10) is provided with a limiting surface facing the annular bulge, and one surface of the annular bulge, which is far away from the spring (12), can be in limiting contact with the limiting surface.
4. The backwash pre-filter according to claim 2, characterized in that the guide sleeve (808) is connected with the bottom of the inner frame (8), and a flow passage for water flow is arranged between the outer wall of the guide sleeve (808) and the inner wall of the inner frame (8).
5. the backwash pre-filter as set forth in claim 2,
The sliding sealing structure (11) is a central pipe O-shaped ring sleeved on the outer wall of the central pipe (10).
6. the backwash pre-filter as set forth in claim 1,
the outer edge of the guide disc and the outer framework (2) are in sliding seal through a gasket (13);
and/or an outer framework O-shaped ring (3) for sealing the outer framework (2) and the bottle body (1) is arranged between the outer framework and the bottle body;
And/or an inner framework O-shaped ring (9) for sealing the inner framework (8) and the filter screen (7) is arranged between the inner framework and the filter screen;
And/or a copper head O-shaped ring for sealing the copper head structure of the bottle body (1) and the central tube (10) is arranged between the copper head structure and the central tube.
7. The backwash pre-filter as set forth in claim 1, characterized in that a central tube fixing member (14) is fixedly provided in the bottle body (1);
one end of the guide section, which is far away from the backwashing section, is connected with the central pipe fixing piece (14) through a central pipe fixing screw (15).
8. The backwash prefilter according to claim 1, wherein said outer frame (2) is provided with scraping strips (4) and an extension member (16) for driving said outer frame (2) to rotate;
The scraping strip (4) is provided with a scraping blade (401) which is contacted with the inner surface of the bottle body (1) and/or a scraping brush which is contacted with the filter screen (7).
9. The backflush prefilter according to claim 1 wherein there is a center tube O-ring (6) between the center tube (10) and the endoskeleton (8) for sealing the two;
A back washing inlet (1005) is arranged on the central pipe (10) on one side of the central pipe O-shaped ring (6), and the other side of the central pipe O-shaped ring is a solid surface without the back washing opening;
The backwashing conversion piece (5) is provided with a conversion piece opening part;
When the water purification state is carried out, the opening part of the conversion part is correspondingly sealed with the solid surface; in the back washing state, the opening part of the conversion piece is correspondingly communicated with the back washing inlet (1005).
10. A backflush prefilter according to any one of claims 1 to 9 wherein the exoskeleton (2) has a first mating sealing surface (203) on the side facing the water inlet of the bottle (1);
the backflushing converter (5) has a second mating sealing surface (502), and the first mating sealing surface (203) is in sealing engagement with the second mating sealing surface (502) in the backflushing state.
11. A water purifier comprising a backflush pre-filter, wherein the backflush pre-filter is as claimed in any one of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910918225.8A CN110538501A (en) | 2019-09-26 | 2019-09-26 | back-flushing prefilter and water purifier with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910918225.8A CN110538501A (en) | 2019-09-26 | 2019-09-26 | back-flushing prefilter and water purifier with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110538501A true CN110538501A (en) | 2019-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910918225.8A Pending CN110538501A (en) | 2019-09-26 | 2019-09-26 | back-flushing prefilter and water purifier with same |
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| Country | Link |
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| CN (1) | CN110538501A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111280153A (en) * | 2020-03-16 | 2020-06-16 | 贵州省园艺研究所(贵州省园艺工程技术研究中心) | Water-spraying irrigation device for planting cabbage mustard |
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| DE3307918A1 (en) * | 1983-03-05 | 1984-09-06 | Joh. A. Benckiser Wassertechnik Gmbh, 6905 Schriesheim | BACKWASHABLE FILTER DEVICE |
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| CN111280153A (en) * | 2020-03-16 | 2020-06-16 | 贵州省园艺研究所(贵州省园艺工程技术研究中心) | Water-spraying irrigation device for planting cabbage mustard |
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