KR20100133123A - Water purifier which can wash water purifying filter therein - Google Patents

Water purifier which can wash water purifying filter therein Download PDF

Info

Publication number
KR20100133123A
KR20100133123A KR1020090051837A KR20090051837A KR20100133123A KR 20100133123 A KR20100133123 A KR 20100133123A KR 1020090051837 A KR1020090051837 A KR 1020090051837A KR 20090051837 A KR20090051837 A KR 20090051837A KR 20100133123 A KR20100133123 A KR 20100133123A
Authority
KR
South Korea
Prior art keywords
water
filter
filtration unit
unit
shutoff valve
Prior art date
Application number
KR1020090051837A
Other languages
Korean (ko)
Inventor
문형민
윤성한
Original Assignee
웅진코웨이주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 웅진코웨이주식회사 filed Critical 웅진코웨이주식회사
Priority to KR1020090051837A priority Critical patent/KR20100133123A/en
Publication of KR20100133123A publication Critical patent/KR20100133123A/en

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/16—Cleaning-out devices, e.g. for removing the cake from the filter casing or for evacuating the last remnants of liquid
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

PURPOSE: A water purifier capable of easily backwashing a purifying filter is provided to backwash the purifying filter using washing water stored inside a washing water tank connected to a filtering unit. CONSTITUTION: A water purifier capable of easily backwashing a purifying filter comprises a filtering unit(200), a raw water shutoff valve(300), a feed unit(400), and a backwashing unit(500). The filtering unit includes more than one purifying filter filtering water inserted to the inside. The raw water shutoff valve is connected to the rear end of the filtering unit.

Description

Water purifier that can backwash water filter {WATER PURIFIER WHICH CAN WASH WATER PURIFYING FILTER THEREIN}

The present invention relates to a water purifier capable of backwashing a water filter.

The water purifier is a device that filters the introduced water and supplies it to the user.

Such water purifiers include one or more water filters so that the incoming water can be filtered through them. On the other hand, there is a problem that such a water filter is not washable.

Accordingly, when foreign matter accumulates in the water filter and the filtration function of the water filter is reduced, there is a problem in that the water filter cannot be washed and must be replaced with a new one.

And, the replacement of the water filter must be performed by a skilled person at regular intervals.

Therefore, there is a problem that the operation of the water purifier is not easy.

The present invention is made by recognizing at least one of the needs or problems occurring in the conventional water purifier as described above.

One object of the present invention is to be able to easily backwash the water filter with a simple structure.

Another object of the present invention is to be able to backwash the water filter using the residual water present in the filtration unit of the water purifier and the wash water stored in the washing water storage tank connected to the filtration unit.

Another object of the present invention is to facilitate the operation of the water purifier by increasing the replacement cycle of the water filter.

A water purifier capable of backwashing a water filter according to an embodiment for realizing at least one of the above problems may include the following features.

The present invention is basically based on backwashing a water filter included in the filtration unit of the water purifier using the residual water present in the filtration unit of the water purifier and the wash water stored in the washing water storage tank connected to the filtration unit.

A water purifier capable of backwashing a water filter according to an embodiment of the present invention is connected to each other and includes a filtration unit including one or more water filters for filtering the introduced water; A raw water shutoff valve connected to the rear end of the filtration part; A supply unit connected to the raw water shutoff valve and supplying the filtered water to the user; And when the inflow of water into the filtration unit is blocked by the raw water shutoff valve, a station connected to the filtration unit to wash one or more purified water filters using the residual water present in the filtration unit and the wash water stored in the washing water storage tank connected to the filtration unit. Washing unit; As shown in FIG.

In this case, the backwashing unit flow path switching valve provided in the flow pipe connected to the inlet of the water filter to be cleaned of one or more water filters; A drain pipe connected to the flow path switching valve; A washing water storage tank connected to the flow pipe connecting the outlet of the purified water filter to be cleaned and the raw water shutoff valve; And a control unit connected to the raw water shutoff valve and the flow path switching valve to close the raw water shutoff valve to block the inflow of water to the filtration unit, and then to convert the flow path of the flow path switching valve to the drain pipe so that the purified water filter to be washed is cleaned. It may include.

On the other hand, the water filter to be washed may be a membrane filter.

In this case, the membrane filter may be an UF filter or an MF filter.

According to the embodiment of the present invention as described above, it is possible to easily wash the water filter with a simple structure.

In addition, according to an embodiment of the present invention, the purified water filter may be backwashed using the residual water present in the filtration unit of the water purifier and the washing water stored in the washing water storage tank connected to the filtration unit.

Further, according to the embodiment of the present invention, it is possible to lengthen the replacement cycle of the water filter can facilitate the operation of the water purifier.

In order to help the understanding of the features of the present invention as described above, it will be described in more detail with respect to the water purifier capable of backwashing the water filter according to the embodiment of the present invention.

Hereinafter, the described embodiments will be described on the basis of the most suitable embodiments for understanding the technical features of the present invention, and the technical features of the present invention are not limited by the described embodiments. It is to be exemplified that the present invention can be implemented as in the following embodiments. Accordingly, the present invention may be modified in various ways within the technical scope of the present invention through the embodiments described below, and such modified embodiments fall within the technical scope of the present invention. In order to facilitate understanding of the embodiments to be described below, in the reference numerals shown in the accompanying drawings, among the constituent elements which perform the same function in each embodiment, the related constituent elements are indicated by the same or an extension line number.

Embodiments related to the present invention are basically based on backwashing the water filter included in the filtration unit of the water purifier using the residual water present in the filtration unit of the water purifier and the wash water stored in the washing water storage tank connected to the filtration unit.

As shown in FIG. 1, the backwashable water purifier according to the present invention includes a filtration unit 200, a raw water shutoff valve 300, a supply unit 400, and a backwash unit 500. Can be.

The filtration unit 200 may include one or more water purification filters as shown in FIG. 1. These water filters may be connected to each other by a flow tube as shown in the illustrated embodiment. Water introduced into the filtration unit 200 may be filtered while passing through the one or more water filters. In the illustrated embodiment, the purified water filter uses a precipitated carbon composite filter 210, a fucarbon filter 220, and a membrane filter 230. However, the purified water filter used in the filtration unit 200 is not limited thereto, and any water filter may be used as long as it can filter the introduced water.

The raw water shutoff valve 300 may be connected to the rear end of the filtration unit 200 as shown in FIG. 1. That is, the purified water filter located in the most downstream of one or more water filters included in the filtration unit, in the illustrated embodiment may be connected to the membrane filter 230. When the raw water shutoff valve 300 is closed, water flowing into the filtration unit 200 may be blocked.

The supply unit 400 may be connected to the raw water shutoff valve 300 as in the embodiment shown in FIG. When the raw water shutoff valve 300 is opened, the water filtered by the filtration unit 200 may be supplied to the supply unit 400. Accordingly, water filtered by the filtering unit 200 may be supplied to the user. In order to supply water filtered by the filter unit 200 to the user as shown in the illustrated embodiment, the supply unit 400 is a water purification tank 410, a cold water tank 420, a warm water tank ( 430, the cold water / constant water cock 440, and the warm water water cock 450 may be included. In the illustrated embodiment, the water filtered in the filtering unit 200 passes through the raw water shutoff valve 300 and is first introduced into and stored in the purified water tank 410 of the supply unit 400 connected thereto. The filtered water stored in the purified water tank 410 may be cooled by being introduced into the cold purified water tank 420 or may be heated by being introduced into the warm purified water tank 430. Meanwhile, in the illustrated embodiment, the purified water tank 410 or the cold purified water tank 420 is connected to the cold purified water / clean water cock 440. Therefore, the filtered water stored in the purified water tank 410 or the filtered water cooled in the cold purified water tank 420 may be supplied to the user through the cold purified water / clean water cock 440. In addition, the warm water tank 430 is connected to the warm water cock 450. Therefore, the filtered water heated in the warm water tank 430 may be supplied to the user through the warm water cock 450. Meanwhile, in the illustrated embodiment, the filtered water heated in the warm water tank 430 may flow into the purified water tank 410. However, the configuration of the supply unit 400 is not limited to the illustrated embodiment, and any configuration may be used as long as the raw water shutoff valve 300 is open to supply water filtered by the filter unit 200 to the user.

The backwashing unit 500 may be connected to the filtration unit 200 as shown in FIG. 1. The backwashing unit 500 is closed when the raw water shutoff valve 300 is blocked, the inflow of water to the filtration unit 200, the residual water present in the filtration unit 200 and the wash water storage tank connected to the filtration unit 200 ( Wash water stored in 530 may be used to wash one or more water filters.

To this end, the backwashing unit 500 may include a flow path switching valve 510, a drain pipe 520, a wash water storage tank 530, and a control unit 540 as shown in the embodiment shown in FIG. 1. .

Flow path switching valve 510 may be provided in the flow pipe (T) connected to the inlet of the water filter to be cleaned of one or more water filters included in the filtration unit 200. In the embodiment shown in FIG. 1, the water filter to be cleaned is a membrane filter 230. Therefore, as illustrated, the flow path switching valve 510 is provided in the flow pipe T connected to the inlet of the membrane filter 230. However, for example, if the purified water filter to be washed in the illustrated embodiment is the carbon filter 220, the flow path switching valve 510 may be provided in the flow pipe connected to the inlet of the carbon filter 220. In addition, in the illustrated embodiment, only the membrane filter 230, that is, only one water filter may be cleaned. However, two or more water filters, for example, the carbon filter 220 and the membrane filter 230 may be washed together in the illustrated embodiment. In this case, the flow path switching valve 510 may be provided in a flow pipe connected to the inlet of the after carbon filter 220. Meanwhile, the membrane filter 230 may be an UF filter or an MF filter.

The drain pipe 520 may be connected to the flow path switching valve 510 as shown in FIG. 1. When filtration is performed in the filtration unit 200, the flow path of the flow path switching valve 510 is switched to allow water to flow into the purified water filter to be cleaned, and in the illustrated embodiment, the membrane filter 230. Then, when the water filter is washed, the flow path of the flow path switching valve 510 is switched to allow water to flow from the water filter to be cleaned, in the illustrated embodiment, from the membrane filter 230 to the drain pipe 520.

The wash water storage tank 530 may be connected to a flow pipe connecting the outlet of the purified water filter to be cleaned and the raw water shutoff valve 300. In the embodiment shown in FIG. 1, since the membrane filter 230 is cleaned, the membrane filter 230 may be connected to a flow pipe T ′ connecting the outlet of the membrane filter 230 and the raw water shutoff valve 300. However, for example, if the purified water filter to be washed in the illustrated embodiment is the carbon filter 220, the flow pipe connecting the outlet of the after carbon filter 220 and the raw water cutoff valve 300, that is, the outlet of the after carbon filter 220 It may be connected to the flow pipe (T ') connected to the outlet of the flow pipe or membrane filter 230 connected to. In addition, if the two or more water filters, for example, the after-carbon filter 220 and the membrane filter 230 in the illustrated embodiment to wash, it may be connected to the flow pipe (T ') connected to the outlet of the membrane filter (230). On the other hand, when filtration in the filtration unit 200, the purified water filter to be washed in the illustrated embodiment, the water filtered in the membrane filter 230 flows through the flow pipe (T ') connected to the outlet of the membrane filter 230 Inflow to the washing water storage tank 530 by the pressure of the water to be stored. And, when washing the water filter, that is, when the flow path of the flow path switching valve 510 is switched to the drain pipe 520, the filtered water stored in the wash water storage tank 530, the washing water is flow pipe (by the pressure of the stored water) The purified water filter to be cleaned after T '), and in the illustrated embodiment, flows backward through the membrane filter 230 to clean the membrane filter 230.

On the other hand, the purified water filter to be washed, in the illustrated embodiment the residual water present in the flow pipe (T ') connecting the membrane filter 230 and the raw water shutoff valve 300 is also reversed to the membrane filter 230 by the pressure of the residual water The membrane filter 230 is washed while flowing. As such, the water flowing back to the membrane filter 230 to wash the membrane filter 230, that is, the residual water present in the flow pipe T ′ in the illustrated embodiment and the washing water stored in the washing water storage tank 530 are converted into flow paths. Pass through the valve 510 is discharged to the outside through the drain pipe (520).

The control unit 540 may be connected to the raw water shutoff valve 300 and the flow path switching valve 510, as shown in the embodiment shown in FIG. Therefore, when filtration is performed in the filtration unit 200, the raw water shutoff valve 300 is opened and the flow path of the flow path switching valve 510 is converted into a purified water filter to be washed, and in the illustrated embodiment, the membrane filter 230. When the water filter is washed, the raw water shutoff valve 300 is closed to block water from flowing into the filtration unit 200, and then the flow path of the flow path switching valve 510 is switched to the drain pipe 520. Accordingly, the residual water present between the purified water filter to be cleaned and the raw water shutoff valve 300 and the washing water stored in the washing water storage tank 530 flow back through the purified water filter to be washed to wash the purified water filter.

Hereinafter, the operation of the water purifier 100 capable of backwashing the water filter according to the present invention will be described.

When the water is filtered and supplied to the user, the raw water cutoff valve 300 is opened by the controller 540 and the water purification filter to wash the flow path of the flow path switching valve 510, and the membrane filter 230 in the embodiment shown in FIG. 1. ) So that water can enter and be filtered. Thus, in this case, water first flows into the filtration unit 200 as shown in FIG. As such, the water introduced into the filtration unit 200 may include at least one purified water filter included in the filtration unit 200, and in the illustrated embodiment, the sedimentation line carbon composite filter 210 and the after carbon filter 220 and the membrane filter 230. Filtered in turn). The water filtered in the membrane filter 230 flows to the raw water shutoff valve 300 through the flow pipe (T ') connected to the outlet of the membrane filter 230. At this time, water is introduced into and stored in the washing water storage tank 530 connected to the flow tube T 'by the pressure of the water flowing through the flow tube T'. The filtered water flowing into the raw water shutoff valve 300 is first introduced into the purified water tank 410 is stored. The water stored in the purified water tank 410 may be cooled by being introduced into the cold purified water tank 420 or may be heated by being introduced into the warm purified water tank 430. Filtered water stored in the purified water tank 410 or the filtered water cooled in the cold water tank 420 is supplied to the user through the cold water / purified water cock 440. The filtered water heated in the warm water tank 430 is supplied to the user through the warm water cock 450.

On the other hand, when washing one or more water purification filters included in the filtration unit 200, that is, in the case of washing the membrane filter 230 in the case of the illustrated embodiment, first, the raw water shut-off valve 300 by the control unit 540 ). Accordingly, the water flowing into the filtration unit 200 is blocked. Then, the flow path switched to the water filter to be cleaned, that is, the membrane filter 230, is switched to the drain pipe 520 by the control unit 540. Accordingly, as shown in FIG. 3, the residual water and the flow pipe existing in the water filter to be cleaned, that is, the flow pipe T ′ connecting the outlet of the membrane filter 230 and the raw water shutoff valve 300 in the illustrated embodiment. The washing water, which is the water stored in the washing water storage tank 530 connected with T ', flows back to the membrane filter 230 by the pressure, thereby washing the membrane filter 230. As such, the water that is washed through the water filter, that is, the membrane filter 230, and the membrane filter 230 is passed through the flow path switching valve 510 and is discharged to the outside through the drain pipe 520.

As such, when the water purifier capable of backwashing according to the present invention is used, the water filter can be easily backwashed with a simple structure.

Then, the water filter may be backwashed using the residual water present in the filtration unit of the water purifier and the washing water stored in the washing water storage tank connected to the filtration unit.

In addition, it is possible to increase the replacement cycle of the water filter, thereby facilitating the operation of the water purifier.

The water purifier capable of backwashing the purified water filter described above is not limited to the configuration of the above-described embodiment, but the embodiments may be selectively combined with all or some of the embodiments so that various modifications may be made. It may be configured.

1 is a view showing an embodiment of a water purifier capable of backwashing according to the present invention.

Figure 2 is a view showing a case of supplying water to the user by filtering the filter in one embodiment of the backwash water purifier according to the present invention.

3 is a view illustrating a case where one or more water filters are washed using one embodiment of a backwash water purifier according to the present invention.

 Explanation of symbols on the main parts of the drawings

100: water purifier 200: filtration unit

210: precipitated carbon composite filter 220: fucarbon filter

230: membrane filter 300: raw water shutoff valve

400: supply part 410: water purification tank

420: cold water tank 430: hot water tank

440: cold water / purified water cock 450: hot water cock

500: backwash 510: flow path switching valve

520: drain pipe 530: washing water storage tank

540: control unit T, T ': flow tube

Claims (4)

A filtration unit 200 connected to each other and including at least one purified water filter for filtering the introduced water; A raw water shutoff valve 300 connected to the rear end of the filtration unit 200; A supply unit 400 connected to the raw water shutoff valve 300 and supplying water filtered by the filtration unit 200 to a user; And When the inflow of water into the filtration unit 200 is blocked by the raw water shutoff valve 300, the residual water existing in the filtration unit 200 and the washing water stored in the washing water storage tank 530 connected to the filtration unit 200. A back washing unit 500 connected to the filtration unit 200 so as to wash the at least one purified water filter; Water purifier capable of backwashing the water filter configured, including. The method of claim 1, wherein the backwashing unit 500 A flow path switching valve 510 provided in a flow pipe connected to an inlet of the water filter to be cleaned among the one or more water filters; A drain pipe 520 connected to the flow path switching valve 510; The wash water storage tank 530 connected to a flow pipe connecting the outlet of the purified water filter to be cleaned and the raw water shutoff valve 300; And The flow path of the flow path switching valve 510 is connected to the raw water shutoff valve 300 and the flow path switching valve 510 and closes the raw water shutoff valve 300 to block the inflow of water to the filtration unit 200. A control unit 540 for converting the drain pipe 520 to be washed with the purified water filter to be washed; Water purifier capable of backwashing the water filter, characterized in that it comprises a. The water purifier of claim 2, wherein the water filter to be cleaned is a membrane filter (230). The water purifier capable of backwashing a water filter according to claim 3, wherein the membrane filter (230) is an UF filter or an MF filter.
KR1020090051837A 2009-06-11 2009-06-11 Water purifier which can wash water purifying filter therein KR20100133123A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020090051837A KR20100133123A (en) 2009-06-11 2009-06-11 Water purifier which can wash water purifying filter therein

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020090051837A KR20100133123A (en) 2009-06-11 2009-06-11 Water purifier which can wash water purifying filter therein

Publications (1)

Publication Number Publication Date
KR20100133123A true KR20100133123A (en) 2010-12-21

Family

ID=43508550

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020090051837A KR20100133123A (en) 2009-06-11 2009-06-11 Water purifier which can wash water purifying filter therein

Country Status (1)

Country Link
KR (1) KR20100133123A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20130071010A (en) * 2011-12-20 2013-06-28 코웨이 주식회사 Apparatus for regenerating antibacterial filter and water purifier having the same and method for regenerating antibacterial filter
KR101339990B1 (en) * 2011-09-16 2013-12-11 김홍기 Cleaning apparatus for water conditioner filter
KR101954761B1 (en) * 2017-10-20 2019-03-06 주식회사 마이크로필터 Filter Assembly for Cleaning Water
KR20230067792A (en) 2021-11-09 2023-05-17 코웨이 주식회사 Composite filter and water purifier with the same
WO2023085548A1 (en) 2021-11-09 2023-05-19 코웨이 주식회사 Composite filter and water purifier including same
KR20230072240A (en) 2021-11-17 2023-05-24 코웨이 주식회사 Composite filter and water purifier with the same
KR20230073755A (en) 2021-11-19 2023-05-26 코웨이 주식회사 Composite filter and water purifier with the same
KR20240012075A (en) 2022-07-20 2024-01-29 코웨이 주식회사 Fluid treatment system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101339990B1 (en) * 2011-09-16 2013-12-11 김홍기 Cleaning apparatus for water conditioner filter
KR20130071010A (en) * 2011-12-20 2013-06-28 코웨이 주식회사 Apparatus for regenerating antibacterial filter and water purifier having the same and method for regenerating antibacterial filter
KR101954761B1 (en) * 2017-10-20 2019-03-06 주식회사 마이크로필터 Filter Assembly for Cleaning Water
KR20230067792A (en) 2021-11-09 2023-05-17 코웨이 주식회사 Composite filter and water purifier with the same
WO2023085548A1 (en) 2021-11-09 2023-05-19 코웨이 주식회사 Composite filter and water purifier including same
KR20230072240A (en) 2021-11-17 2023-05-24 코웨이 주식회사 Composite filter and water purifier with the same
KR20230073755A (en) 2021-11-19 2023-05-26 코웨이 주식회사 Composite filter and water purifier with the same
KR20240012075A (en) 2022-07-20 2024-01-29 코웨이 주식회사 Fluid treatment system

Similar Documents

Publication Publication Date Title
KR20100133123A (en) Water purifier which can wash water purifying filter therein
CN206645904U (en) More water temperature cleaning systems and water purifier with preheating
CN206447608U (en) A kind of pair of film mutually backwashes water manufacturing system
JP5189549B2 (en) Filtration system with back washing function and washing method of filter
CN111185101A (en) Water purification unit with filter element group spare
CN203922880U (en) A kind of water-purifying machine
CN101143303B (en) Household full-automatic double film self-flushing water-purifying device
CN109336223A (en) A kind of water purification system
CN205710139U (en) Water purifier with backwashing function
CN201055753Y (en) Household full-automatic double-film self-flushing purifier
CN208839378U (en) Water purifier water treatment system under a kind of kitchen
CN102897935A (en) Ultrafiltration type direct drinking water purifier
KR200346473Y1 (en) Water purifiting system to be washed by back fresh
CN103157317A (en) Water filter apparatus and washing method thereof
CN115676974A (en) Direct drinking water purification system and forward and reverse flushing method of ultrafiltration membrane group of direct drinking water purification system
CN211871575U (en) Energy-saving household water purifier
CN212720261U (en) Multistage water purification integrated device and zero-cold-water gas water heater using same
KR101647647B1 (en) Water purifier being able to wash high turbid filter
CN210286987U (en) Ultra-filtration water purifying device capable of automatically backwashing
CN109231532B (en) Water purifier
CN209411855U (en) A kind of water purification system
CN210419594U (en) Water dispenser with water temperature adjusting and filtering water flow and back flushing functions
CN209292101U (en) Water purifier water circuit system and water purifier
CN204490628U (en) Purifier
CN101480547A (en) Multifunctional water processing filtering system

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E601 Decision to refuse application