CN108314169A - Micro air bubble water generating device control system - Google Patents

Micro air bubble water generating device control system Download PDF

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Publication number
CN108314169A
CN108314169A CN201710035328.0A CN201710035328A CN108314169A CN 108314169 A CN108314169 A CN 108314169A CN 201710035328 A CN201710035328 A CN 201710035328A CN 108314169 A CN108314169 A CN 108314169A
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China
Prior art keywords
water
micro air
air bubble
water tank
valve
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Pending
Application number
CN201710035328.0A
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Chinese (zh)
Inventor
崔真豪
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Individual
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Individual
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Application filed by Individual filed Critical Individual
Priority to CN201710035328.0A priority Critical patent/CN108314169A/en
Publication of CN108314169A publication Critical patent/CN108314169A/en
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B60N2/2881—Upholstery, padded or cushioned members therefor
    • 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
    • C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/3415—Heating or cooling
    • B29C44/3426—Heating by introducing steam in the mould
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/26—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles for children
    • B60N2/28—Seats readily mountable on, and dismountable from, existing seats or other parts of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7017—Upholstery springs ; Upholstery characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/06—Pressure conditions
    • C02F2301/066—Overpressure, high pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Transportation (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Child & Adolescent Psychology (AREA)
  • Chemical & Material Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Environmental & Geological Engineering (AREA)
  • Hydrology & Water Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Percussion Or Vibration Massage (AREA)

Abstract

The present invention proposes a kind of micro air bubble water installations control system, drainpipe is installed on the right side of water tank, drain valve and drainage pump are installed on drainpipe, allow the water outlet of undissolved general water or low concentration air-bubble inside water tank, it is that the drainage pump started by drain valve is realized, and enter water stop valve, drain valve and drainage pump, water outlet stop valve connect with PCB control panels, function start-up operation by PCB control panels control completion；Vacuum release (relief) valve is installed in one side of water tank；Non-return valve is installed between water tank and vacuum release (relief) valve；The water outlet installation is provided with the micro air bubble nozzle of micro air bubble water, and the end of drainpipe is connected to water intake end or the water outlet of micro air bubble nozzle, and micro air bubble nozzle is connect with PCB control panels, and function start-up operation is controlled by PCB control panels and completed；In water tank the micro air bubble water of more preferably smooth, the continuous discharge high concentration of undissolved light water discharge, by a push-botton operation come activation system, with easy to use.

Description

Micro air bubble water generating device control system
Technical field
The present invention relates to micro air bubble water to generate technical field, and in particular to a kind of micro air bubble water generation easy to use Apparatus control system.
Background technology
Micro air bubble water（Micro bubble）Refer to the superfine air bubble that 1~50um or less can not with the naked eye confirm, one As bubble present in water be（Bubble, bubble）It is normal to be ruptured on the surface after rising toward water surface, but Micro bubble It can shrink while being under pressure in water, be ruptured while generating the various energy later.
Micro bubble have gas solute effect, self pressure effect, the Wuli-Shili-Renli system approach such as charging effect, Different fields are widely used.Such as it applies and washing force, purifying contaminated water, shower, intelligent horse can be improved in Wash tub It is applied on the products such as bucket or bathtub.Bacterium parasitic in aquatic products suitable nozzles is removed, is also used in massage, health is promoted, is restored The various fields extensive use such as fatigue.
However, existing generation micro air bubble water installations, as shown in Figure 1, the water by pipeline supply flows into inside water tank Produced pressure.It flows into air present in the water and water tank of water tank and is mutually dissolved generation air-bubble, at this moment formed in water tank Hydraulic pressure and nozzle are discharged by air-bubble by drainpipe.
But feed-tank supplies water always, after having certain time, the air capacity in water tank is caused to gradually decrease.Inside is formed Pressure also with becoming smaller, in this state micro air bubble water will not high concentration generation.It only will produce the bubble of bottom concentration Water or light water.
At this moment, it can just be reused using the water inside the Valved discharge water tank of water tank lower end after stopping water outlet.This Kind problem brings the inconvenience of several seconds to be waited for or several minutes to user.
When discharging internal light water with above method, vacuum state has been formed inside water tank.Want discharge naturally that can bring Certain difficulty leads to the delay a period of time that discharges water.
It needs that drain valve is installed in water tank lower end, also individually to connect drainpipe.So can also there is meeting on installation space The problems such as being restricted.Up to the present, enter water and the water outlet and the control mode of drain valve for generating bubble water installations are all machines Tool mode controls, so generating certain difficulty in terms of control system.
Therefore, easily controllable generated with the micro air bubble for being continuously generated micro air bubble water of equipment that can generate air-bubble fills The necessity for setting control system attracts attention.
Invention content
The object of the present invention is to provide one kind, and undissolved light water discharge is more preferably smooth in water tank, it is highly concentrated constantly to discharge The micro air bubble water of degree, by a push-botton operation come activation system, with micro air bubble water installations control system easy to use.
In order to solve the problems existing in background technology, the present invention adopts the following technical solutions：A kind of micro air bubble water Apparatus control system, it includes water tank, water inlet, enter water comb, enter water stop valve, water outlet, is discharged comb and water outlet cut-out Valve；The water inlet is connected with water comb is entered, and water tank is stored into water stop valve to control inflow by being installed in water inlet Enter water break-make, the water outlet of the water tank lower end connect with water outlet comb, is passed through and is discharged stop valve control water outlet and cuts off；
Drainpipe is installed on the right side of the water tank, drain valve and drainage pump are installed on drainpipe, makes water tank inside undissolved General water or low concentration air-bubble water outlet, be that the drainage pump that is started by drain valve is realized, and enters water stop valve, draining Valve and drainage pump, water outlet stop valve are connect with PCB control panels, and function start-up operation is controlled by PCB control panels and completed.
As a further improvement on the present invention；Inside water tank when the water outlet of the air-bubble of undissolved general water or low concentration, In order to release the vacuum state formed inside water tank, vacuum release (relief) valve is installed in the one side of water tank, vacuum release (relief) valve with PCB control panels connect, and function start-up operation is controlled by PCB control panels and completed.
As a further improvement on the present invention；When being released using vacuum state of the vacuum release (relief) valve inside water tank, prevent The water of low concentration or the adverse current of general water, non-return valve is installed between the water tank and vacuum release (relief) valve inside water tank.
As a further improvement on the present invention；The water outlet installation is provided with the micro air bubble spray of micro air bubble water The end of mouth, drainpipe is connected to water intake end or the water outlet of micro air bubble nozzle；It is not molten in the water tank being discharged by drainage pump The general water of solution or the air-bubble of low concentration can choose whether to provide micro air bubble water, micro air bubble by micro air bubble nozzle Nozzle is connect with PCB control panels, and function start-up operation is controlled by PCB control panels and completed.
After adopting the above technical scheme, the invention has the advantages that：
First, drainage pump is installed in water tank, the air allowed in water tank and the light water or low concentration air-bubble that do not dissolve are easy In the effect of discharge；
Second, the vacuum that one side of water tank installation releases the vacuum state formed inside water tank releases pump, not with air in water tank When the air-bubble discharge of the general water of dissolving or low concentration, the vacuum state inside water tank can be released, allow inside water tank one As the air-bubble of water or low concentration be easy to discharge effect；
Third is sprayed using the undissolved general water of drainage pump discharge or the air-bubble water outlet installation micro air bubble of low concentration Mouth.It is allowed in the state of the air-bubble of undissolved general water or low concentration, can also be used to height by this micro air bubble nozzle Density fine air-bubble and the effect for ceaselessly using micro air bubble water；
4th, utilize electric control system.Carry out activation system using a button and uses the effect above brought convenience.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with Obtain other attached drawings according to these attached drawings.
Fig. 1 is the structural schematic diagram that micro air bubble water installations are generated in background technology；
Fig. 2 is the structural schematic diagram of embodiment provided by the present invention；
Reference numeral：
1-water tank；2-water inlets；3-enter water comb；4-enter water stop valve；5-water outlets；6-water outlet combs；7-water outlets Stop valve；8-drainpipes；9-drain valves；10-drainage pumps；11-vacuum release (relief) valves；12-non-return valves；13-micro air bubbles Nozzle；14-PCB control panels.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, right below in conjunction with specific implementation mode The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are only to explain the present invention, and It is not used in the restriction present invention.
Referring to Fig. 2, present embodiment uses following technical scheme：A kind of micro air bubble water installations control system, Including water tank（1）, water inlet（2）, enter water comb（3）, enter water stop valve（4）, water outlet（5）, water outlet comb（6）, water outlet cut Disconnected valve（7）, drainpipe（8）, drain valve（9）, drainage pump（10）, vacuum release (relief) valve（11）, non-return valve（12）, micro air bubble nozzle （13）With PCB control panels（14）；
The water inlet（2）With enter water comb（3）Connection, by water inlet（2）It installs into water stop valve（4）To control stream Enter to be stored into water tank（1）Enter water break-make, the water tank（1）The water outlet of lower end（5）With water outlet comb（6）Connection, by going out Water stop valve（7）Control water outlet cut-out；
The water tank（1）Right side is equipped with drainpipe（8）, drainpipe（8）On drain valve is installed（9）And drainage pump（10）, Allow water tank（1）The water outlet of internal undissolved general water or low concentration air-bubble, is to pass through drain valve（9）Come the drainage pump started （10）It realizes, and enters water stop valve（4）, drain valve（9）And drainage pump（10）, water outlet stop valve（7）With PCB control panels（14） Connection, function start-up operation is by PCB control panels（14）Control is completed；
Water tank（1）When the air-bubble water outlet of internal undissolved general water or low concentration, in order to release water tank（1）What inside was formed Vacuum state, in the water tank（1）Side is equipped with vacuum release (relief) valve（11）, vacuum release (relief) valve（11）With PCB control panels （14）Connection, function start-up operation is by PCB control panels（14）Control is completed；
Utilize vacuum release (relief) valve（11）In water tank（1）When internal vacuum state releases, water tank is prevented（1）The water of internal low concentration Or the adverse current of general water, in the water tank（1）With vacuum release (relief) valve（11）Between non-return valve is installed（12）；
The water outlet（5）Place's installation is provided with the micro air bubble nozzle of micro air bubble water（13）, drainpipe（8）End connect It is connected on micro air bubble nozzle（13）Water intake end or water outlet；Pass through drainage pump（10）The water tank of water outlet（1）It is interior, undissolved one As the air-bubble of water or low concentration can choose whether through micro air bubble nozzle（13）Micro air bubble water, micro air bubble spray are provided Mouth（13）With PCB control panels（14）Connection, function start-up operation are controlled by PCB control panels and are completed.
The service water part used for family（Wash basin, shower, kitchen etc.）It is upper to use micro air bubble water, give user It brings convenience and just invents this case, pass through water inlet first（2）With enter water comb（3）The water tank of connection（1）Inside flow into water, be Pass through water inlet（2）Installation enters water stop valve（4）Unlatching and be flowed into water tank（1）.It is discharged comb（6）In, water outlet（5） Water outlet stop valve（7）It closes, leads to water tank（1）It is interior to flow into the hydraulic pressure of water, and form water tank internal pressure.
At this moment, toward water tank（1）The water that inside flows into, with water tank（1）The internal mutual phased soln of air generates air-bubble, at this moment gives birth to At micro air bubble water can pass through water tank（1）The water outlet comb of lower end（6）It is discharged immediately while startup.
But above-mentioned startup can lead to water tank（1）Water is inside flowed into always, generates water tank（1）Internal air capacity gradually subtracts It is few, at this moment because of water tank（1）Internal pressure change leads to the micro air bubble water that high concentration will not be discharged, but low concentration is discharged Air-bubble or general water.At this moment stop water inlet, start drain valve（9）Give off the water of low concentration or general water.
For this purpose, utilizing PCB control panels（14）Start and is mounted on water tank（1）The drainpipe of side（8）In drainage pump（10） When, water tank can be discharged（1）The air-bubble of internal undissolved general water or low concentration.
At this moment, above-mentioned water tank（1）Inside can form vacuum state, lead to the bubble of undissolved general water or low concentration The natural discharge of water acquires a certain degree of difficulty, but utilizes vacuum release (relief) valve（11）Release water tank（1）It can be prevented if interior vacuum state Caused by vacuum phenomenon the phenomenon that delay water outlet.
Another aspect vacuum release (relief) valve（11）Side install non-return valve（12）, water tank（1）When inside releases vacuum state, It prevents in water tank（1）Internal water backflow phenomena.That is water tank（1）Connect drainage pump（10）, allow water tank（1）In it is undissolved with air The air-bubble of general water or low concentration is easy to be discharged.
It is that drainage pump is utilized in addition, in the present invention for the air-bubble for giving off low concentration or general water（10）.It wants It allows for if leading to the problem of noise, drainpipe can also be used（8）Or hose substitutes drainage pump（10）, system just Often starting will not be affected, and at this moment wish drainpipe（8）If water outlet, PCB control panels can be utilized（14）It is true to start Empty relief valve（11）Allow water tank（1）Inner vacuum is easily discharged water outlet after releasing.
In addition, in drainpipe（8）End connection installation water outlet（5）, in water outlet（5）Place's installation is according to user Needs, selectivity use micro air bubble water micro air bubble nozzle（13）.Micro air bubble nozzle is installed（13）Main purpose is, In water tank（1）In pass through be discharged stop valve（7）Come the air-bubble being normally discharged and above-mentioned drainage pump（10）Startup and generate Water tank（1）In the air-bubble of undissolved general water or low concentration be discharged state in, can also constantly use fine gas It is soaked.
Therefore, the microbubble generating apparatus system in the present invention is by PCB control panels（14）Button open It is dynamic, it is brought using upper convenience to consumer, the draining currently with mechanical systems such as handles and water tank can also be solved（1）It is interior The problems such as difficulty and water outlet that portion is discharged naturally caused by generating vacuum state postpone.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie In the case of without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, nothing By from the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended Claim rather than above description limit, it is intended that the institute that will be fallen within the meaning and scope of the equivalent requirements of the claims It changes and is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art The other embodiment being appreciated that.

Claims (4)

1. micro air bubble water installations control system, it includes water tank, water inlet, enters water comb, enter water stop valve, water outlet, go out Water comb and water outlet stop valve；The water inlet is connected with water comb is entered, and is controlled into water stop valve by being installed in water inlet System flow into be stored into water tank enter water break-make, the water outlet and water outlet comb of the water tank lower end connect, and pass through water outlet stop valve Control water outlet cut-out；
It is characterized in that, being equipped with drainpipe on the right side of the water tank, drain valve and drainage pump are installed on drainpipe, allow water tank The water outlet of internal undissolved general water or low concentration air-bubble is that the drainage pump started by drain valve is realized, and enters water Stop valve, drain valve and drainage pump, water outlet stop valve are connect with PCB control panels, and function start-up operation is controlled by PCB control panels It completes.
2. micro air bubble water installations control system according to claim 1, which is characterized in that undissolved one inside water tank As the water outlet of the air-bubble of water or low concentration when, in order to release the vacuum state formed inside water tank, pacify in the one side of water tank Equipped with vacuum release (relief) valve, vacuum release (relief) valve is connect with PCB control panels, and function start-up operation is controlled by PCB control panels and completed.
3. micro air bubble water installations control system according to claim 2, which is characterized in that using vacuum release (relief) valve in water When vacuum state inside case releases, the water of low concentration or the adverse current of general water inside water tank are prevented, in the water tank and very Non-return valve is installed between empty relief valve.
4. micro air bubble water installations control system according to claim 1, which is characterized in that the water outlet installation It is provided with the micro air bubble nozzle of micro air bubble water, the end of drainpipe is connected to water intake end or the water outlet of micro air bubble nozzle End；In the water tank being discharged by drainage pump, the air-bubble of undissolved general water or low concentration chooses whether to pass through micro air bubble Nozzle provides micro air bubble water, and micro air bubble nozzle is connect with PCB control panels, and function start-up operation has been controlled by PCB control panels At.
CN201710035328.0A 2017-05-18 2017-05-18 Micro air bubble water generating device control system Pending CN108314169A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201710035328.0A CN108314169A (en) 2017-05-18 2017-05-18 Micro air bubble water generating device control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201710035328.0A CN108314169A (en) 2017-05-18 2017-05-18 Micro air bubble water generating device control system

Publications (1)

Publication Number Publication Date
CN108314169A true CN108314169A (en) 2018-07-24

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ID=62623302

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201710035328.0A Pending CN108314169A (en) 2017-05-18 2017-05-18 Micro air bubble water generating device control system

Country Status (1)

Country Link
CN (1) CN108314169A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009018118A (en) * 2007-07-13 2009-01-29 Rinnai Corp Microbubble generator
WO2009116711A2 (en) * 2008-03-20 2009-09-24 Sunny Ngtech Co., Ltd. Apparatus of generating microbubbles
CN101618296A (en) * 2008-07-03 2010-01-06 株式会社日立制作所 Liquid processing device
CN202086759U (en) * 2011-04-08 2011-12-28 陈文萍 Super-micro bubble pipeline system
CN103861488A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Micro-bubble generating device
CN104058492A (en) * 2014-07-11 2014-09-24 宁波海伯精工机械制造有限公司 Microbubble water generation method and generation device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009018118A (en) * 2007-07-13 2009-01-29 Rinnai Corp Microbubble generator
WO2009116711A2 (en) * 2008-03-20 2009-09-24 Sunny Ngtech Co., Ltd. Apparatus of generating microbubbles
CN101618296A (en) * 2008-07-03 2010-01-06 株式会社日立制作所 Liquid processing device
CN202086759U (en) * 2011-04-08 2011-12-28 陈文萍 Super-micro bubble pipeline system
CN103861488A (en) * 2014-03-19 2014-06-18 中国船舶重工集团公司第七○二研究所 Micro-bubble generating device
CN104058492A (en) * 2014-07-11 2014-09-24 宁波海伯精工机械制造有限公司 Microbubble water generation method and generation device

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Effective date of abandoning: 20210813