CN211770640U - Water purifier with multi-stage filtration - Google Patents

Water purifier with multi-stage filtration Download PDF

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Publication number
CN211770640U
CN211770640U CN201921067254.XU CN201921067254U CN211770640U CN 211770640 U CN211770640 U CN 211770640U CN 201921067254 U CN201921067254 U CN 201921067254U CN 211770640 U CN211770640 U CN 211770640U
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China
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water
salt
plate
pump
well pipe
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邹焕鑫
邹清川
邹振生
张伟瑜
李月莲
尹悦超
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Guangxi Guohong Zhihong Environmental Protection Technology Group Co ltd
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Guangxi Guohong Zhihong Environmental Technology Development Co ltd
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Abstract

The utility model belongs to the technical field of water treatment, concretely relates to purifier with multiple stage filtration. A water purifier with multi-stage filtration comprises a first water pump, a PP cotton filter, a water softener, an ultrafiltration membrane component, a back flush pump, an air pump, a second water pump, an electric cabinet, an ultraviolet sterilizer and the like which are all arranged on a frame body; the salt box is characterized by comprising a barrel body, a box cover, a salt well pipe cover, a salt absorption pipe and a salt plate; the salt plate is provided with salt well pipe holes, blind holes and water flow holes; the rivers hole and side hole be the through-hole so that supply water, the middle part of salt board can set up the concave groove, the concave groove can include square groove and V-arrangement groove. The utility model discloses the effect is: the arranged rail sliding grooves are matched for use, so that the salt plate can be taken out in a labor-saving manner; can be dissolved quickly and reach saturation, and has the advantages of low processing cost, high efficiency and the like.

Description

Water purifier with multi-stage filtration
Technical Field
The utility model belongs to the technical field of water treatment, concretely relates to purifier with multiple stage filtration.
Background
The hardness of water is mainly composed of cations in water, such as calcium (Ca2+), magnesium (Mg2+) ions. When the hardness of water is higher, if do not carry out the softening and handle very easy scale deposit when directly passing through the cooling tower coil pipe to influence the heat exchange efficiency of cooling tower, consequently generally can use the water softener to handle industrial raw water. The principle of the water softener is as follows: when raw water containing hardness components passes through the resin layer in the water softener, calcium (Ca2+) and magnesium (Mg2+) ions in the water are exchanged and adsorbed by the resin, and sodium (Na +) ions are released by the same mass, so that the water flowing out of the water softener is softened water with the hardness ions removed. When the resin adsorbing calcium (Ca2+) and magnesium (Mg2+) ions reaches a certain degree, the exchange resin in the water softener fails, the water softener automatically performs regeneration work of the failed resin according to a preset program, and the failed resin is restored to the sodium resin again through the failed resin by using a NaCl solution with higher concentration.
Water softeners are generally equipped with a salt tank for dissolving NaCl, and an excess amount of NaCl is added to the salt tank to make the solution a saturated NaCl solution (i.e., saturated brine). The water softener multi-way valve sucks saturated salt water in the salt tank into the water softener to regenerate the failure resin. For example, CN204873943U discloses a water softener, which comprises a softener and a salt tank, wherein the salt tank is composed of a tank body and a salt well cover, the side surface of the tank body is provided with a salt pipe orifice and an overflow orifice, and the salt pipe orifice of the salt tank is connected with a salt suction orifice on a softening valve head through a salt suction hose; the salt well and the regenerated salt box partition board are arranged in the box body, the salt well is inserted into a salt well inserting hole of the regenerated salt box partition board, a plurality of partition board supporting legs are arranged on the regenerated salt box partition board, a salt absorption filter is arranged in the salt well, a salt absorption pipe connecting port is arranged at the upper end of the salt well, and the salt well is connected with a salt absorption hose through the salt absorption pipe connecting port. The softener is connected with the salt well of the salt box through a salt absorption port on the softening valve, and the regeneration step is as follows: salt absorption, water supplement, back flushing and normal flushing, and sewage after salt absorption and flushing is discharged from a sewage discharge outlet.
At present, most of the salt special for large-particle soft water is used on a water softener because common refined industrial salt has more impurities, long dissolving time, easy salt bridge formation or salt particle formation and difficult cleaning; if the existing water softener adopts refined industrial salt, the salt absorption pipe is easy to absorb impurities and salt particles, block the salt absorption valve and even pollute resin and softened water. Due to the existence of impurities, the salt plate is easy to be hardened around and difficult to take out, so that the optimized design is necessary; in addition, most of the existing salt plates are flat plates, and the contact surface of a solute and a solvent can be enlarged so as to facilitate rapid dissolution and achieve saturation, so that the operation efficiency is improved.
In addition, as the Chinese invention patent, CN201621402071.5, a water softener salt box and a water softener disclose a sealed salt plate, and the contact area is objectively increased by arranging filter caps above and below the salt plate.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a technical scheme.
The utility model aims at providing a purifier with multiple stage filtration, its salt board is taken out the clearance easily or is changed, dissolves salt effect and regeneration effect good, user experience preferred.
The above object of the present invention can be achieved by the following technical solutions:
a water purifier with multi-stage filtration comprises a first water pump 100, a PP cotton filter 200, a water softener 300, an ultrafiltration membrane component 500, a backwashing pump 600, an air pump 700, a second water pump 800, an electric cabinet 900, an ultraviolet sterilizer 1000 and the like which are all arranged on a frame body 400; the water inlet of the PP cotton filter 200 is connected with the first water pump 100, and the water outlet is connected with the water inlet of the water softener 300; the water inlet of the ultrafiltration membrane module 500 is connected with the water outlet of the water softener 300, and the water outlet of the ultrafiltration membrane module 500 is connected with the water inlet of the backwashing pump 600 and discharges water to the outer water tank 1100; the water inlet of the ultrafiltration membrane module 500 is simultaneously connected with the inlet of a flow meter on the electric cabinet 900 so as to test the flow and discharge water to the outer water tank 1100 through the flow meter; the second water pump 800 pumps the outer water tank 1100 through the ultraviolet sterilizer 1000 and outputs the water to complete the water purification process, and the water softener 300 comprises a resin tank 302 and a salt tank 301 which are connected through a salt absorption pipe 3016; the salt box 301 is characterized by comprising a barrel body 3011, a box cover 3012, a salt well pipe 3014, a salt well pipe cover 3015, a salt absorption pipe 3016 and a salt plate 3017; an overflow port 3013 is arranged on the barrel body 3011 and is sealed by a box cover 3012; the upper end of the salt well pipe 3014 is sealed by a salt well pipe cover 3015, the lower end is opened and fixed on a salt plate 3017, the salt absorption pipe 3016 is installed inside the salt well pipe 3014 and is connected with the resin tank 302 so as to discharge water and absorb salt liquid, and the salt plate 3017 is provided with a salt well pipe hole 30171, a blind hole 30172 and a water flow hole 30173; the water flow holes 30173 and the side holes 30174 are through holes for water supply, a concave groove can be arranged in the middle of the salt plate 3017, the concave groove can comprise a square groove 30175 and a V-shaped groove 30176, and the square groove 30175 and the V-shaped groove 30176 can be provided with side holes 30174 for water inlet and outlet.
The V-shaped groove 30176 can also be provided with a V-notch 30177, a step 30178 and a sliding groove 30179; the V-notch 30177 is disposed at the lower portion of the salt plate 3017, the step 30178 is disposed at the periphery of the salt plate 3017, and the sliding grooves 30179 are disposed at two sides of the salt plate 3017.
The blind hole 30172 may be a trapezoidal hole, and a spiral inner groove may be disposed on the trapezoidal hole.
The water outlet of the first water pump 100 is connected with a pressure gauge on the electric cabinet 900 so as to measure and monitor the pressure.
The water outlet of the water softener 300 is connected with a pressure gauge on the electric cabinet 900 so as to measure and monitor the pressure.
The utility model has the advantages and positive effects that: due to the adoption of the technical scheme, the arranged track sliding grooves are matched for use, the salt plates are clamped between the salt boxes, the salt plates can be taken out in a labor-saving manner, and the structure is simple; meanwhile, because the contact surface is increased, the rapid dissolution and saturation can be realized, and the device has the advantages of simple structure, convenience in maintenance, low processing cost, high efficiency and the like.
Drawings
FIG. 1 is a schematic structural diagram of the present invention
FIG. 2 is a schematic view of another angle structure of the present invention
FIG. 3 is the structure diagram of the rear view angle of the present invention
FIG. 4 is a flow chart of the product structure of the present invention
FIG. 5 is a process flow of the water treatment apparatus of the present invention
FIG. 6 is a schematic view of the structure of the salt tank 301
FIG. 7 is a schematic structural diagram of a salt plate 3017 with square slots 30175
FIG. 8 is a schematic view of a salt board 3017 with V-shaped grooves 30176
FIG. 9 is a schematic structural view of barrel 3011
FIG. 10 is a front sectional view of the barrel 3011
FIG. 11 is a schematic view showing an assembled structure of the barrel body 3011 and the V-shaped groove 30176
First Water Pump 100
PP cotton filter 200
Water softener 300
Salt box 301: staving 3011 (including dead plate 30112, slide rail 30111), case lid 3012, overflow port 3013, salt well pipe 3014, salt well pipe cover 3015, salt absorption pipe 3016, salt board 3017, salt well pipe hole 30171, blind hole 30172 (trapezoidal hole, spiral), water flow 30173, side hole 30174, square groove 30175, V-shaped groove 30176, V-notch 30177, step 30178, runner 30179,
fixing plate 3018
Rack 400
Ultrafiltration membrane module 500
Backwash pump 600
Air pump 700
Second Water Pump 800
Electric box 900
Ultraviolet lamp 1000
Detailed Description
The technical solution of the present invention will be described in detail with reference to fig. 1-11 and the specific embodiments, it should be understood that these embodiments are only used for illustrating the present invention and are not used to limit the scope of the present invention, and after reading the present invention, the modifications of the various equivalent forms of the present invention by those skilled in the art all fall into the scope defined by the appended claims of the present application.
Example 1:
as shown in fig. 1 to 5, municipal water is pumped by a first water pump 100, enters a PP cotton filter 200, is primarily filtered, is reduced in hardness by a water softener 300, is purified by an ultrafiltration membrane module 500, is pumped by a backwash pump 600 into a water tank for standby, and is finally pumped by a second water pump 800 through an ultraviolet sterilizer 1000 to be sterilized to obtain purified water (see fig. 4 and 5).
The utility model comprises a first water pump 100, a PP cotton filter 200, a water softener 300, an ultrafiltration membrane component 500, a back washing pump 600, an air pump 700, a second water pump 800, an electric cabinet 900, an ultraviolet sterilizer 1000 and the like which are all arranged on a frame body 400; the PP cotton filter 200 can adopt a polypropylene melt-blown filter element which is common in the market, the water inlet of the PP cotton filter 200 is connected with the first water pump 100, and the water outlet is connected with the water inlet of the water softener 300; the outlet of the first water pump 100 is connected to a pressure gauge on the electronic control box 900 to measure the monitored pressure. The water inlet of the ultrafiltration membrane module 500 is connected with the water outlet of the water softener 300, and the water outlet of the ultrafiltration membrane module 500 is connected with the water inlet of the backwashing pump 600 and discharges water to the outer water tank 1100; the water outlet of the water softener 300 is connected to a pressure gauge on the electric cabinet 900 to measure the monitored pressure. The water inlet of the ultrafiltration membrane module 500 is simultaneously connected with the inlet of a flow meter on the electric cabinet 900 so as to test the flow and discharge water to the outer water tank 1100 through the flow meter; the second water pump 800 pumps the outer water tank 1100 to be disinfected by the ultraviolet disinfector 1000 and then outputs the water to finish the water purification process, and the water softener 300 comprises a resin tank 302 and a salt tank 301 which are connected through a salt absorption pipe 3016; see fig. 1-3.
The salt box 301 comprises a barrel body 3011, a box cover 3012, a salt well pipe 3014, a salt well pipe cover 3015, a salt absorption pipe 3016 and a salt plate 3017; an overflow port 3013 is arranged on the barrel body 3011 so that the solution can be sealed from the salt tank 301 by a tank cover 3012; the upper end of the salt well pipe 3014 is sealed by a salt well pipe cover 3015, the lower end is opened and fixed on a salt plate 3017 (see fig. 6), a salt absorption pipe 3016 is installed inside the salt well pipe 3014 and is connected with the resin tank 302 so as to discharge water and absorb salt liquid, and the salt plate 3017 is provided with a salt well pipe hole 30171, a blind hole 30172 and a water flow hole 30173; the water flow holes 30173 and the side holes 30174 are through holes for water supply, the middle of the salt plate 3017 can be provided with concave grooves, the concave grooves can comprise square grooves 30175 and V-shaped grooves 30176 (as shown in FIGS. 7 and 8), and the square grooves 30175 and the V-shaped grooves 30176 can be provided with side holes 30174 for water inlet and outlet. Salt plates 3017 may be secured to securing plates 30112 of tubs 3011, as shown in fig. 9 and 10.
Therefore, when the salt box operation is not required, the regenerated salt is placed in the salt box 301, i.e., on the upper portion of the salt plate 3017. At this point, the regenerated salt remains in the form of particles because there is no water as a solvent.
Therefore, when the resin tank 302 needs to be regenerated by salt liquid, water can be introduced into the bottom in the salt tank 301 through the salt absorption pipe 3016, the fixing plate 30112 is arranged on the barrel 3011, the salt plate 3017 is fixed on the fixing plate 30112, the bottom of the salt plate 3017 forms a space capable of containing water or salt liquid, and the salt plate 3017 is provided with the water flow holes 30173 which are through from top to bottom (the regenerated salt cannot permeate but can permeate and rise and then contact with the regenerated salt to dissolve the regenerated salt), so the regenerated salt can be dissolved until the regenerated salt is saturated. In order to accelerate dissolution, the contact surface between the dissolved substance and the solvent can be enlarged as much as possible, so the contact surface between the regenerated salt and water can be increased, and the contact area can be enlarged due to the plane type of the ordinary salt plate 3017, embodiment 1 of the present invention is that the middle part of the salt plate 3017 can be provided with a concave groove, the concave groove can comprise a square groove 30175 and a V-shaped groove 30176 (as shown in fig. 7 and 8), and both the square groove 30175 and the V-shaped groove 30176 can be provided with a side hole 30174 for water to enter and exit.
In the case of square slots 30175, side holes 30174 are provided for water access, see fig. 7, where the contact surface between the regenerating salt and water can be increased to speed up dissolution, and the blind holes 30172 can be trapezoidal holes with spiral internal slots to increase the contact area.
Example 2:
when the groove is a V-shaped groove 30176, the V-shaped groove 30176 may also be provided with a V-notch 30177, a step 30178 and a chute 30179; the V-shaped notch 30177 is arranged at the lower part of the salt plate 3017, the step 30178 is arranged at the periphery of the salt plate 3017, and the sliding grooves 30179 are arranged at two sides of the salt plate 3017; the barrel 3011 is provided with a slide rail 30111, so that the salt plate 3017 can be taken out smoothly through the chute 30179 for cleaning or replacing and other operations, see fig. 8.
Example 3:
therefore, when the resin tank 302 needs to be regenerated by salt liquid, water can be introduced into the bottom in the salt tank 301 through the salt absorption pipe 3016, the fixing plate 30112 is arranged on the barrel 3011, the salt plate 3017 is fixed on the fixing plate 30112, the bottom of the salt plate 3017 forms a space capable of containing water or salt liquid, and the salt plate 3017 is provided with the water flow holes 30173 which are through from top to bottom (the regenerated salt cannot permeate but can permeate and rise and then contact with the regenerated salt to dissolve the regenerated salt), so the regenerated salt can be dissolved until the regenerated salt is saturated. In order to accelerate dissolution, the contact surface between the dissolved substance and the solvent can be enlarged as much as possible, so the contact surface between the regenerated salt and water can be increased, and the contact area can be enlarged due to the plane type of the ordinary salt plate 3017, embodiment 1 of the present invention is that the middle part of the salt plate 3017 can be provided with a concave groove, the concave groove can comprise a square groove 30175 and a V-shaped groove 30176 (as shown in fig. 7 and 8), and both the square groove 30175 and the V-shaped groove 30176 can be provided with a side hole 30174 for water to enter and exit.
In the case of square slots 30175, side holes 30174 are provided for water access, see fig. 7, where the contact surface between the regenerating salt and water can be increased to speed up dissolution, and the blind holes 30172 can be trapezoidal holes with spiral internal slots to increase the contact area. At this time, the cross section of the spiral inner groove is square.
Example 4:
therefore, when the resin tank 302 needs to be regenerated by salt liquid, water can be introduced into the bottom in the salt tank 301 through the salt absorption pipe 3016, the fixing plate 30112 is arranged on the barrel 3011, the salt plate 3017 is fixed on the fixing plate 30112, the bottom of the salt plate 3017 forms a space capable of containing water or salt liquid, and the salt plate 3017 is provided with the water flow holes 30173 which are through from top to bottom (the regenerated salt cannot permeate but can permeate and rise and then contact with the regenerated salt to dissolve the regenerated salt), so the regenerated salt can be dissolved until the regenerated salt is saturated. In order to accelerate dissolution, the contact surface between the dissolved substance and the solvent can be enlarged as much as possible, so the contact surface between the regenerated salt and water can be increased, and the contact area can be enlarged due to the plane type of the ordinary salt plate 3017, embodiment 1 of the present invention is that the middle part of the salt plate 3017 can be provided with a concave groove, the concave groove can comprise a square groove 30175 and a V-shaped groove 30176 (as shown in fig. 7 and 8), and both the square groove 30175 and the V-shaped groove 30176 can be provided with a side hole 30174 for water to enter and exit.
In the case of square slots 30175, side holes 30174 are provided for water access, see fig. 7, where the contact surface between the regenerating salt and water can be increased to speed up dissolution, and the blind holes 30172 can be trapezoidal holes with spiral internal slots to increase the contact area. At this time, the cross section of the spiral inner groove is semicircular.
Example 5:
when the groove is a V-shaped groove 30176, the V-shaped groove 30176 may also be provided with a V-notch 30177, a step 30178 and a chute 30179; the V-shaped notch 30177 is arranged at the lower part of the salt plate 3017, the step 30178 is arranged at the periphery of the salt plate 3017, and the sliding grooves 30179 are arranged at two sides of the salt plate 3017; the barrel 3011 is provided with a slide rail 30111, so that the salt plate 3017 can be taken out smoothly through the chute 30179 for cleaning or replacing and other operations, see fig. 8. In order to increase the contact area between the regenerated salt and water so as to accelerate dissolution, the blind holes 30172 may be trapezoidal holes, and the trapezoidal holes may be provided with spiral inner grooves, so that the contact area can be increased. At this time, the cross section of the spiral inner groove is square.
Example 6:
when the groove is a V-shaped groove 30176, the V-shaped groove 30176 may also be provided with a V-notch 30177, a step 30178 and a chute 30179; the V-shaped notch 30177 is arranged at the lower part of the salt plate 3017, the step 30178 is arranged at the periphery of the salt plate 3017, and the sliding grooves 30179 are arranged at two sides of the salt plate 3017; the barrel 3011 is provided with a slide rail 30111, so that the salt plate 3017 can be taken out smoothly through the chute 30179 for cleaning or replacing and other operations, see fig. 8. In order to increase the contact area between the regenerated salt and water so as to accelerate dissolution, the blind holes 30172 may be trapezoidal holes, and the trapezoidal holes may be provided with spiral inner grooves, so that the contact area can be increased. At this time, the cross section of the spiral inner groove is semicircular.
The above description is only a few examples of the present invention, and although the embodiments of the present invention are disclosed as above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

1. A water purifier with multi-stage filtration comprises a first water pump (100), a PP cotton filter (200), a water softener (300), an ultrafiltration membrane assembly (500), a backwashing pump (600), an air pump (700), a second water pump (800), an electric cabinet (900), an ultraviolet sterilizer (1000) and the like which are all arranged on a frame body (400); the water inlet of the PP cotton filter (200) is connected with the first water pump (100) and the water outlet is connected with the water inlet of the water softener (300); the water inlet of the ultrafiltration membrane component (500) is connected with the water outlet of the water softener (300), and the water outlet of the ultrafiltration membrane component (500) is connected with the water inlet of the backwashing pump (600) and discharges water to the outer water tank (1100); the water inlet of the ultrafiltration membrane assembly (500) is simultaneously connected with the inlet of a flow meter on the electric cabinet (900) so as to test the flow and discharge water to the outer water tank (1100) through the flow meter; the second water pump (800) pumps the outer water tank (1100) through the ultraviolet sterilizer (1000) and outputs the water to finish the water purification process; the water softener (300) comprises a resin tank (302) and a salt tank (301) which are connected through a salt suction pipe (3016); the salt box (301) is characterized by comprising a barrel body (3011), a box cover (3012), a salt well pipe (3014), a salt well pipe cover (3015), a salt absorption pipe (3016) and a salt plate (3017); an overflow port (3013) is arranged on the barrel body (3011) and is sealed by a box cover (3012); the upper end of the salt well pipe (3014) is sealed by a salt well pipe cover (3015), the lower end of the salt well pipe is opened and fixed on a salt plate (3017), the salt absorption pipe (3016) is installed inside the salt well pipe (3014) and is connected with the resin tank (302) so as to discharge water and absorb salt liquid, and the salt plate (3017) is provided with a salt well pipe hole (30171), a blind hole (30172) and a water flow hole (30173); the water flow hole (30173) and the side hole (30174) are both through holes so as to supply water; the middle part of the salt plate (3017) can be provided with a concave groove, the concave groove can comprise a square groove (30175) and a V-shaped groove (30176), and the square groove (30175) and the V-shaped groove (30176) can be provided with side holes (30174) for water to enter and exit.
2. The water purifier with multistage filtration according to claim 1, wherein said V-shaped groove (30176) is further provided with a V-notch (30177), a step (30178), a slide slot (30179); the V-shaped notch (30177) is arranged at the lower part of the salt plate (3017), the steps (30178) are arranged at the periphery of the salt plate (3017), and the sliding chutes (30179) are arranged at two sides of the salt plate (3017).
3. The water purifier with multistage filtration according to claim 1, wherein the blind holes (30172) are trapezoidal holes, and the trapezoidal holes are provided with spiral inner grooves.
4. The water purification machine with multi-stage filtration according to claim 1, wherein the water outlet of said first water pump (100) is connected to a pressure gauge on the electric cabinet (900) for measuring the monitored pressure.
5. The water purifier with multi-stage filtration according to claim 1, wherein the water outlet of the water softener (300) is connected with a pressure gauge on the electric cabinet (900) for measuring and monitoring pressure.
CN201921067254.XU 2019-07-08 2019-07-08 Water purifier with multi-stage filtration Active CN211770640U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921067254.XU CN211770640U (en) 2019-07-08 2019-07-08 Water purifier with multi-stage filtration

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921067254.XU CN211770640U (en) 2019-07-08 2019-07-08 Water purifier with multi-stage filtration

Publications (1)

Publication Number Publication Date
CN211770640U true CN211770640U (en) 2020-10-27

Family

ID=72906744

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921067254.XU Active CN211770640U (en) 2019-07-08 2019-07-08 Water purifier with multi-stage filtration

Country Status (1)

Country Link
CN (1) CN211770640U (en)

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GR01 Patent grant
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CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 537100 Guohong Zhihong factory area, qintang Industrial Park, Guigang City, Guangxi Zhuang Autonomous Region

Patentee after: Guangxi Guohong Zhihong Environmental Protection Technology Group Co.,Ltd.

Address before: 537100 Guohong Zhihong factory area, qintang Industrial Park, Guigang City, Guangxi Zhuang Autonomous Region

Patentee before: GUANGXI GUOHONG ZHIHONG ENVIRONMENTAL TECHNOLOGY DEVELOPMENT Co.,Ltd.

EE01 Entry into force of recordation of patent licensing contract
EE01 Entry into force of recordation of patent licensing contract

Assignee: Guangxi Guohong Zhihong Water Service Co.,Ltd.

Assignor: Guangxi Guohong Zhihong Environmental Protection Technology Group Co.,Ltd.

Contract record no.: X2023980048970

Denomination of utility model: A water purifier with multi-stage filtration

Granted publication date: 20201027

License type: Common License

Record date: 20231129