CN109281841A - A kind of mute water warming blanket, pad - Google Patents

A kind of mute water warming blanket, pad Download PDF

Info

Publication number
CN109281841A
CN109281841A CN201811053550.4A CN201811053550A CN109281841A CN 109281841 A CN109281841 A CN 109281841A CN 201811053550 A CN201811053550 A CN 201811053550A CN 109281841 A CN109281841 A CN 109281841A
Authority
CN
China
Prior art keywords
water
water pump
pump
impeller
period
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
CN201811053550.4A
Other languages
Chinese (zh)
Inventor
王彤宇
Original Assignee
王彤宇
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 王彤宇 filed Critical 王彤宇
Priority to CN201811053550.4A priority Critical patent/CN109281841A/en
Publication of CN109281841A publication Critical patent/CN109281841A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00Control, e.g. regulation, of pumps, pumping installations or systems
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C21/00Attachments for beds, e.g. sheet holders, bed-cover holders; Ventilating, cooling or heating means in connection with bedsteads or mattresses
    • A47C21/04Devices for ventilating, cooling or heating
    • A47C21/048Devices for ventilating, cooling or heating for heating
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C27/00Spring, stuffed or fluid mattresses or cushions specially adapted for chairs, beds or sofas
    • A47C27/08Fluid mattresses or cushions
    • A47C27/085Fluid mattresses or cushions of liquid type, e.g. filled with water or gel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00Pumping installations or systems
    • F04D13/02Units comprising pumps and their driving means
    • F04D13/06Units comprising pumps and their driving means the pump being electrically driven
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/007Details, component parts, or accessories especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/66Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps

Abstract

The present invention relates to a kind of mute water warming blanket, pads by water pump driving hot water circuit heat transfer heating.Vibration is smaller when purpose seeks to provide a kind of work, more mute water warming blanket, pad.It is characterized by: the water pump is using centrifugal;The water pump uses brush DC, electronic commutation mode;The impeller diameter of the water pump :≤8cm;The number of blade of the impeller of the water pump: >=5;The pump power :≤20W;The pump shaft of the water pump is contacted with axle sleeve, frictional position is dipped in water and lubricates;The water pump and the water tank use flexible connection mode.

Description

A kind of mute water warming blanket, pad
Technical field
The present invention relates to a kind of mute water warming blanket, pads by water pump driving hot water circuit heat transfer heating.
Background technique
Existing water warming blanket is made of water tank, water pump, water inlet pipe, outlet pipe, blanket body, electric heater, water tank.When work, electric heating Device heats water, and water pump is recycled delivery to outlet pipe, blanket body, water inlet pipe, water tank.Hot water is outside in blanket body Heat dissipation, to realize that circulating heat transfer heats.At runtime due to water pump, high-speed rotating rotor, impeller vibration, generate noise, The sleep of people is impacted.
Summary of the invention
Vibration is smaller when present invention aim to provide a kind of work, more mute water warming blanket, pad.
It include: water tank, electric heater, water pump, outlet pipe, water inlet pipe, blanket, pad;Aquaporin is set in blanket, pad;Water tank with The water inlet of water pump communicates, and the water outlet of water pump is communicated with outlet pipe, and outlet pipe is communicated with aquaporin again, aquaporin again with water inlet Pipe communicates, and water inlet pipe is communicated with water tank, and electric heater is set in water tank or is set to water tank, water pump, outlet pipe, aquaporin, water inlet pipe Communicate any position for the access to be formed;It is characterized by: the water pump is using centrifugal;The water pump using brush DC, Electronic commutation mode;The impeller diameter of the water pump :≤8cm;The number of blade of the impeller of the water pump: >=5;The water pump function Rate :≤20W;The pump shaft of the water pump is contacted with axle sleeve, frictional position is dipped in water and lubricates;The water pump and the water tank use Flexible connection mode.
When work, electric heater heats water.Water pump operation makes the water in water tank through water pump, outlet pipe, into blanket, pad Aquaporin carry out heat dissipation heating, enter back into water inlet pipe, return water tank, recycle;Since water pump is using centrifugal, structure letter It is single, it runs smoothly, reduces vibration;Water pump uses direct current, brushless, electronic commutation mode, avoids alternating current magnetic wave from shaking, brushless Friction is to reduce vibration;At runtime due to water pump, high-speed rotating impeller diameter be limited in≤8cm also reduces vibration;Water The number of blade of the impeller of pump: it is >=5, more smooth when rotated, decrease vibration;Pump power :≤20W is reduced in this way The operation intensity of water pump also reduces vibration;The pump shaft of water pump is contacted with axle sleeve, frictional position is dipped in water and lubricates, and is also directly subtracted Few vibration;Water pump and water tank use flexible connection mode, in this way, offsetting water pump vibration, water pump and water tank are avoided to generate with frequency altogether Vibration, further decreases noise.It is organically combined by the above comprehensive technical measure, makes to shake when the invention works, noise is down to most Low value, and then realize water warming blanket extremely mute when a kind of work, pad.
Further to improve the present invention: the water outlet of the water pump is set to the top of pump case;Including controlling electric installation, control electricity Device carries out energization a period of time to the water pump, then powers off a period of time, when constantly repeating energization a period of time, one section of power-off Between;When controlling electric installation to the Pump Failure, the impeller of the water pump stops operating, the gas tangled in pump case with impeller Bubble, gas float up under the gravity of water, the water outlet discharge through water pump.
In this way, control electric installation carries out a period of time that is powered to water pump, and during this period of time water pump operation makes water tank when work Interior water carries out heat dissipation heating through water pump, outlet pipe, into blanket, the intracorporal aquaporin of pad, enters back into water inlet pipe, returns water Case;Control electric installation carries out power-off a period of time to water pump, and during this period of time impeller stops operating, and tangles in pump case with impeller Bubble, gas floated up under the gravity of water, the discharge of water outlet through water pump;Control electric installation leads to water pump again Electric a period of time, pump working, bubble, the gas of the water outlet discharge through water pump enter outlet pipe in company with water flow, enter back into Blanket, the intracorporal aquaporin of pad, enter back into water inlet pipe, enter back into water tank, and be discharged to atmosphere;Control electric installation again breaks to water pump It electric a period of time ..., repeats the above process, hot water radiates from inside to outside in blanket, pad, realizes that circulating heat transfer heats with this.And And in this way, the continuous bubble tangled with impeller being discharged in pump case, gas, make the impeller of water pump not will receive gas when rotated The interference of bubble, gas, keeps water pump operation more stable, reduces vibration, more mute, thus it is more stable when realizing a kind of work, it is more quiet Water warming blanket, the pad of sound.
Further to improve the present invention: the water inlet of the water pump is upward;Including controlling electric installation, the control electric installation is to described Water pump carries out a period of time that is powered, then powers off a period of time, constantly repeats be powered a period of time, power-off a period of time;When control electricity When device is to the Pump Failure, the impeller of the water pump stops operating, and the bubble that tangles in pump case with impeller, gas are in water Gravity under float up, the water inlet through water pump enters water tank.
In this way, control electric installation carries out a period of time that is powered to water pump, and during this period of time water pump operation makes water tank when work Interior water carries out heat dissipation heating through water pump, outlet pipe, into blanket, the intracorporal aquaporin of pad, enters back into water inlet pipe, returns water Case;Control electric installation carries out power-off a period of time to water pump, and during this period of time impeller stops operating, and tangles in pump case with impeller Bubble, gas floated up under the gravity of water, the water inlet through water pump enters water tank, and is discharged to atmosphere;Control electricity Device carries out a period of time that is powered to water pump again ..., repeats the above process, hot water radiates from inside to outside in blanket, pad, with this reality Existing circulating heat transfer heating.Also, in this way, the bubble tangled with impeller, gas constantly in discharge pump case, make the impeller of water pump exist The interference that not will receive bubble, gas when rotation, keeps water pump operation more stable, reduces vibration, more mute, to realize a kind of work It is more stable when making, more mute water warming blanket, pad.
In the present invention, since water pump is using centrifugal;Water pump uses brush DC, electronic commutation mode;The impeller of water pump Diameter :≤8cm;The number of blade of impeller: >=5;Pump power :≤20W;Pump shaft is contacted with axle sleeve, frictional position is dipped in water Lubrication;Water pump and water tank use flexible connection mode;Water pump and casing use flexible contact mode;In this way, using complex art Measure shakes when reducing work, so that noise is minimized value, keeps product of the present invention extremely mute when running, do not influence sleeping for people It sleeps, more the market competitiveness.
Detailed description of the invention
Fig. 1,2 are schematic structural view of the invention;
Fig. 3,4 are the present invention, and the structural schematic diagram of aquaporin is set in blanket, pad;
In Fig. 1-4, arrow show water flow, bubble motion direction.
Specific embodiment
In conjunction with Fig. 1,2,3,4, comprising: water tank 1, electric heater 15, water pump 2, outlet pipe 9, water inlet pipe 11, blanket, pad 8;Blanket, Aquaporin 10 is set in pad 8;Water tank 1 is communicated with the water inlet 12 of water pump 2, and the water outlet 5 of water pump 2 is communicated with outlet pipe 9, water outlet Pipe 9 is communicated with aquaporin 10 again, and aquaporin 10 is communicated with water inlet pipe 11 again, and water inlet pipe 11 is communicated with water tank 1, and electric heater 15 is set to Any position for the access to be formed is communicated in water tank 1 or set on water tank 1, water pump 2, outlet pipe 9, aquaporin 10, water inlet pipe 11;Water Pump 2 is using centrifugal;Water pump 2 uses brush DC, electronic commutation mode;6 diameter of impeller of water pump 2 :≤8cm;The leaf of water pump 2 The number of blade of wheel 6: >=5;2 power of water pump :≤20W;The pump shaft 16 of water pump 2 is contacted with axle sleeve 18, frictional position is dipped in water Lubrication;Water pump 2 and water tank 1 use flexible connection mode.
When work, electric heater 15 heats water.Water pump 2, which is run, makes water in water tank 1 through water pump 2, outlet pipe 9, into blanket, Aquaporin 10 in pad 8 carries out heat dissipation heating, enters back into water inlet pipe 11, returns water tank 1, circulation;Due to water pump 2 using from Core type, structure is simple, runs smoothly, and reduces vibration;Water pump 2 uses direct current, brushless, electronic commutation mode, avoids alternating electromagnetic Wave vibration, brushless friction is to reduce vibration;At runtime due to water pump 2, high-speed rotating 6 diameter of impeller be limited in≤ 8cm also reduces vibration;The number of blade of the impeller 6 of water pump 2: it is >=5, more smooth when rotated, decrease vibration;2 function of water pump Rate :≤20W reduces the operation intensity of water pump 2 in this way, also reduces vibration;The pump shaft 16 of water pump 2 contacts with axle sleeve 18, rubs Position, which is dipped in water, to be lubricated, and vibration is also directly reduced;Water pump 2 and water tank 1 use flexible connection mode, shake in this way, offsetting water pump 2 It is dynamic, it avoids water pump 2 and water tank 1 from generating simultaneous resonance, further decreases noise.It is organically combined by the above comprehensive technical measure, Make to shake when the invention works, noise minimizes value, and then realize a kind of extremely mute water warming blanket at work, pad.
In conjunction with Fig. 1,3,4, the water outlet 5 of water pump 2 is set to the top of pump case 3;Including controlling electric installation 13, the control electric installation 13 The a period of time that is powered is carried out to water pump 2, then powers off a period of time, constantly repeats be powered a period of time, power-off a period of time;Work as control When electric installation 13 powers off water pump 2, the impeller 6 of water pump 2 stops operating, and bubble, the gas tangled in pump case 3 with impeller 6 exists It is floated up under the gravity of water, the water outlet 5 through water pump 2 is discharged.
When work, control electric installation 13 carries out a period of time that is powered to water pump 2, and the during this period of time operation of water pump 2 makes water tank 1 Interior water carries out heat dissipation heating through water pump 2, outlet pipe 9, into the aquaporin 10 in blanket, pad 8, enters back into water inlet pipe 11, then Return to water tank 1;Control electric installation 13 carries out power-off a period of time to water pump 2, and during this period of time impeller 6 stops operating, in pump case 3 The interior bubble tangled with impeller 6, gas float up under the gravity of water, and the water outlet 5 through water pump 2 is discharged;Control Denso It sets 13 pairs of water pumps 2 to carry out again a period of time that is powered, water pump 2 works, bubble, the gas of the discharge of water outlet 5 through water pump 2, companion Water flow enters outlet pipe 9, enters back into blanket, the aquaporin 10 in pad 8, enters back into water inlet pipe 11, enters back into water tank 1, and to big Gas discharge;Control electric installation 13 carries out power-off a period of time ... to water pump 2 again, repeats the above process, hot water is in blanket, pad 8 Heat dissipation outward realizes that circulating heat transfer heats with this.Also, in this way, the bubble tangled with impeller 6, gas constantly in discharge pump case 3 Body makes the impeller 6 of water pump 2 not will receive the interference of bubble, gas when rotated, runs water pump 2 more stable, reduces vibration, It is more mute, thus more stable when realizing a kind of work, more mute water warming blanket, pad.
In conjunction with Fig. 2,3,4, the water inlet 12 of water pump 2 is upward;Including control electric installation 13, the control electric installation 13 to water pump 2 into Row is powered a period of time, then powers off a period of time, constantly repeats be powered a period of time, power-off a period of time;When control electric installation 13 When powering off to water pump 2, the impeller 6 of water pump 2 stops operating, the bubble that is tangled in pump case 3 with impeller 6, gas water gravity It is floated up under effect, the water inlet 12 through water pump 2 enters water tank 1.
When work, control electric installation 13 carries out a period of time that is powered to water pump 2, and the during this period of time operation of water pump 2 makes water tank 1 Interior water carries out heat dissipation heating through water pump 2, outlet pipe 9, into the aquaporin 10 in blanket, pad 8, enters back into water inlet pipe 11, then Return to water tank 1;Control electric installation 13 carries out power-off a period of time to water pump 2, and during this period of time impeller 6 stops operating, in pump case 3 The interior bubble tangled with impeller 6, gas float up under the gravity of water, and the water inlet 12 through water pump 2 enters water tank 1, And it is discharged to atmosphere;Control electric installation 13 carries out a period of time that is powered to water pump 2 again ..., repeats the above process, and hot water is in blanket, pad Body 8 radiates from inside to outside, realizes that circulating heat transfer heats with this.Also, in this way, the gas tangled with impeller 6 constantly in discharge pump case 3 Bubble, gas, make the impeller 6 of water pump 2 not will receive the interference of bubble, gas when rotated, run water pump 2 more stable, reduce Vibration, it is more mute, thus more stable when realizing a kind of work, more mute water warming blanket, pad.

Claims (3)

1. a kind of mute water warming blanket, pad, comprising: water tank (1), electric heater (15), water pump (2), outlet pipe (9), water inlet pipe (11), Blanket, pad (8);Aquaporin (10) are set in blanket, pad (8);Water tank (1) is communicated with the water inlet (12) of water pump (2), water pump (2) Water outlet (5) communicated with outlet pipe (9), outlet pipe (9) is communicated with aquaporin (10) again, aquaporin (10) again and water inlet pipe (11) it communicates, water inlet pipe (11) is communicated with water tank (1), and electric heater (15) is set in water tank (1) or is set to water tank (1), water pump (2), outlet pipe (9), aquaporin (10), water inlet pipe (11) communicate any position for the access to be formed;It is characterized by: the water (2) are pumped using centrifugal;The water pump (2) uses brush DC, electronic commutation mode;The impeller (6) of the water pump (2) is straight Diameter :≤8cm;The number of blade of the impeller (6) of the water pump (2): >=5;Water pump (2) power :≤20W;The water pump (2) Pump shaft (16) contacted with axle sleeve (18), frictional position is dipped in water and lubricates;The water pump (2) is with the water tank (1) using soft Property connection type.
2. a kind of mute water warming blanket according to claim 1, pad, it is characterised in that: the water outlet (5) of the water pump (2) Set on the top of pump case (3);Including controlling electric installation (13), when which carries out one section of energization to the water pump (2) Between, then a period of time is powered off, constantly repeat be powered a period of time, power-off a period of time;When control electric installation (13) is to the water pump (2) when powering off, the impeller (6) of the water pump (2) stops operating, and bubble, the gas tangled in pump case (3) with impeller (6) exists It is floated up under the gravity of water, water outlet (5) discharge through water pump (2).
3. a kind of mute water warming blanket according to claim 1, pad, it is characterised in that: the water inlet (12) of the water pump (2) Upward;Including controlling electric installation (13), which carries out a period of time that is powered to the water pump (2), then powers off one section Time constantly repeats be powered a period of time, power-off a period of time;It is described when controlling electric installation (13) to the water pump (2) power-off The impeller (6) of water pump (2) stops operating, in the interior bubble tangled with impeller (6) of pump case (3), gas under the gravity of water It floats up, the water inlet (12) through water pump (2) enters water tank (1).
CN201811053550.4A 2018-08-30 2018-08-30 A kind of mute water warming blanket, pad Withdrawn CN109281841A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811053550.4A CN109281841A (en) 2018-08-30 2018-08-30 A kind of mute water warming blanket, pad

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811053550.4A CN109281841A (en) 2018-08-30 2018-08-30 A kind of mute water warming blanket, pad

Publications (1)

Publication Number Publication Date
CN109281841A true CN109281841A (en) 2019-01-29

Family

ID=65181220

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811053550.4A Withdrawn CN109281841A (en) 2018-08-30 2018-08-30 A kind of mute water warming blanket, pad

Country Status (1)

Country Link
CN (1) CN109281841A (en)

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2667990Y (en) * 2004-01-06 2005-01-05 叶永丰 Water-heating blanket
CN202874728U (en) * 2012-11-09 2013-04-17 江南大学 Low-voltage anti-creeping safe water heating blanket
KR20140059408A (en) * 2012-11-08 2014-05-16 김원장 Boiling and recirculating apparatus for hot-water heating type mat
CN204071327U (en) * 2014-08-28 2015-01-07 胡乐业 Hot-water warming mattress noiselessness self-loopa heating system
CN204345901U (en) * 2014-12-17 2015-05-20 郭宏彬 A kind of water warming blanket main frame heated at constant temperature
CN105065290A (en) * 2015-07-27 2015-11-18 河北深海电器有限公司 Brushless direct-current magnetic water pump
CN205779219U (en) * 2016-05-17 2016-12-07 浙江吉利罗佑发动机有限公司 A kind of depassing unit being applied to engine water pump
CN106288319A (en) * 2015-05-25 2017-01-04 扬中市宏彬冷暖设备有限公司 A kind of water warming blanket system and device
CN107449158A (en) * 2017-08-25 2017-12-08 王彤宇 Heat energy water cycle temperature inspection and control safe and highly efficient operation system

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2667990Y (en) * 2004-01-06 2005-01-05 叶永丰 Water-heating blanket
KR20140059408A (en) * 2012-11-08 2014-05-16 김원장 Boiling and recirculating apparatus for hot-water heating type mat
CN202874728U (en) * 2012-11-09 2013-04-17 江南大学 Low-voltage anti-creeping safe water heating blanket
CN204071327U (en) * 2014-08-28 2015-01-07 胡乐业 Hot-water warming mattress noiselessness self-loopa heating system
CN204345901U (en) * 2014-12-17 2015-05-20 郭宏彬 A kind of water warming blanket main frame heated at constant temperature
CN106288319A (en) * 2015-05-25 2017-01-04 扬中市宏彬冷暖设备有限公司 A kind of water warming blanket system and device
CN105065290A (en) * 2015-07-27 2015-11-18 河北深海电器有限公司 Brushless direct-current magnetic water pump
CN205779219U (en) * 2016-05-17 2016-12-07 浙江吉利罗佑发动机有限公司 A kind of depassing unit being applied to engine water pump
CN107449158A (en) * 2017-08-25 2017-12-08 王彤宇 Heat energy water cycle temperature inspection and control safe and highly efficient operation system

Similar Documents

Publication Publication Date Title
CN1228140A (en) Electromagnetically suspended and rotated centrifugal pumping apparatus and method
CN109185172A (en) Super-silent water warming blanket, pad
CN109281841A (en) A kind of mute water warming blanket, pad
CN105298878B (en) Magnetic suspension frequency changer fans all-in-one machine
WO2003015243A1 (en) Motor with rotating fan
CN203239572U (en) Brushless direct current sliding vane rotary vacuum pump
CN209278184U (en) A kind of energy conservation magnetic suspension air blower
CN207652244U (en) A kind of DC brushless motor
KR101456622B1 (en) Electric motion water meter
CN206419147U (en) A kind of special hydraulic turbine magnetic levitation system of cooling tower
CN208169146U (en) A kind of pump motor of electric car
CN107359741A (en) A kind of automobile motor radiator fan noise reduction anti-shake system
KR100884265B1 (en) Improved noiseless motor pump
CN206957804U (en) A kind of diesel engine
CN203843809U (en) Electric planer
JP4590677B2 (en) Turbo pump
CN203404077U (en) Oil pump
CN206412916U (en) A kind of DC Brushless Motor
CN212838371U (en) High-temperature-resistant, efficient, energy-saving and self-balancing boiler water-feeding pump
CN213574729U (en) Volute type high-temperature-resistant centrifugal impeller fan
JP3201445U (en) Energy saving fan
CN208718954U (en) A kind of DC water pump for water warming blanket
CN208046350U (en) A kind of fan lamp direct current variable frequency motor
CN208870782U (en) High life constant pressure gear pump
CN108625433A (en) A kind of centrifugal pump intelligent frequency reduction or raising frequency energy-saving control system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
WW01 Invention patent application withdrawn after publication
WW01 Invention patent application withdrawn after publication

Application publication date: 20190129