CN1178069A - Air Bubble generating apparatus - Google Patents

Air Bubble generating apparatus Download PDF

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Publication number
CN1178069A
CN1178069A CN 96122788 CN96122788A CN1178069A CN 1178069 A CN1178069 A CN 1178069A CN 96122788 CN96122788 CN 96122788 CN 96122788 A CN96122788 A CN 96122788A CN 1178069 A CN1178069 A CN 1178069A
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CN
China
Prior art keywords
generating apparatus
bubble generating
air
air bubble
pump
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Pending
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CN 96122788
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Chinese (zh)
Inventor
文成大
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WiniaDaewoo Co Ltd
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Daewoo Electronics Co Ltd
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Priority to CN 96122788 priority Critical patent/CN1178069A/en
Publication of CN1178069A publication Critical patent/CN1178069A/en
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Abstract

Air bubble generating apparatus comprises a pump for pumping water and receiving vacuum during pumping the water, a driving source and an air supplying device by using an air pressure difference between the center portion in the vacuum state and an atmosphere. The air supplying device includes a hollow shaft to flow the air, a first valve assembly adjacent to a first end the hollow shaft and screwed in a bearing holder of the driving source, and a second valve assembled arranged at a second end of the hollow shaft. When the pump is operated to vacuum and the solenoid valve opens. The ball valve of the air supplying device is opened to introduce the air into the pump so that air bubbles are generated in pumped water.

Description

Air Bubble generating apparatus
The present invention relates to a kind of air Bubble generating apparatus, particularly a kind of and water pump is connected as a single entity, simply constructed air Bubble generating apparatus.This device provides aeriferous cycle water in crawl, indoor fish jar or Waste Water Treatment.
Usually, air Bubble generating apparatus is used for increasing the amount of oxygen that crawl or indoor fish jar water dissolve.And in washing machine, also used a kind of air Bubble generating apparatus recently, during clothes washing, be used to strengthen washability.Air Bubble generating apparatus is used to aspects such as crawl, indoor fish jar or washing machine.In addition, also used a water pump at aspects such as crawl, indoor fish jar or washing machines, so that the water circulation of the inside.Air Bubble generating apparatus also can be used for supplying air to Waste Water Treatment, so that the organic matter oxidation by air that comprises in the waste water.
Figure 1A and Figure 1B are respectively the profile and the stereograms of a kind of air Bubble generating apparatus of prior art.In Figure 1A and Figure 1B, air Bubble generating apparatus comprises an air pump (not shown) and a bubble generator 10.Be used for when air Bubble generating apparatus under the situation of some specific use, air Bubble generating apparatus also comprises a control appliance (not shown).Air Bubble generating apparatus comprises shell 16, and an inlet that is connected with air pump 12 and an outlet 14 that is arranged on and enters the mouth on 12 relative positions are arranged on the shell 16.One as be inlaid in the shell 16 with the porous body 18 of sponge system.Porous body 18 provides an interface, meets at this from compressed air and flushing liquor that air pump is pressed into.Compressed air is broken into many tiny bubbles during by porous body 18.There is the bubble position plate 22 of a lot of through holes 20 can be fixedly connected in the outlet 14 around the mode that bubble generator 10 sprays above one with the bubble that produces in the bubble generator.
Elastomeric cap 24 with enough suppleness is fixed in the zone above the bubble position plate 22, and elastomeric cap 24 is in primary importance when flat, shown in the dotted line among Figure 1A, to close the through hole 20 on the bubble position plate 22.When bubble generator 10 was started working, elastomeric cap 24 bent to the second place, shown in solid line among Figure 1A, bubble was launched from bubble generator 10.Like this, elastomeric cap 24 can prevent that any foreign matter from entering in the air Bubble generating apparatus.
The air Bubble generating apparatus of prior art needs an air compressor machine and the bubble generator produces bubble.And, also have a problem to be, used in the washing machine or crawl of bubble generator, air Bubble generating apparatus comprises an independent pump, is used for making in the washing tub of washing machine or the water circulation in the crawl.As mentioned above, in the prior art, water circulating pump and the air Bubble generating apparatus that produces bubble are installed separately in crawl or washing machine, thereby pump and air Bubble generating apparatus add together that volume increases, and need one than large space pump and air Bubble generating apparatus to be installed.
United States Patent (USP) NO.4,290,979 (Eiichi sugiura 1981.9.22 is open) disclose a kind of air-blast device that produces micro-bubble in source of oxygen, and solia particle suspension system that can be used in the Waste Water Treatment, in the patent of Sugiura, the liquid of air-blast device in jar provides air.Air-blast device comprises: a pump of linking on the power source; A drinking-water pipe of liquid being delivered to pump from jar; A drainpipe that makes liquid turn back to jar from pump; An air intake apparatus that is installed in the drinking-water pipe, air intake apparatus comprise a main body, and an air duct is arranged on the main body, make between drinking-water pipe inside and the atmosphere to be communicated with, and a valve is installed on the air duct, also have a conduit connecting drainpipe and valve in addition; One is connected in the drainpipe outlet end in the jar and comprises a nozzle that is constrained to an endless loop shell; And an equipment that utilizes many spouts that the port of export of loop and drainpipe is connected together, spout constitutes around overcoat, and each other at a distance of appropriate intervals, the size of air duct is regulated according to the discharge pressure of pump.
In the air-blast device of Sugiura, problem is will provide between power source and the pump connection of a pair of transferring electric power, and air extractor will be positioned between drinking-water pipe and the drainpipe, makes that the structure of air-blast device is very complicated.
The present invention has overcome the above-mentioned defective of prior art.The objective of the invention is, provide one can be in the cycle water of crawl, indoor fish jar or Waste Water Treatment the air Bubble generating apparatus of air feed, it comprises the feeder and the water circulating pump that constitute one, thereby the structure of air Bubble generating apparatus is very simple.
For realizing above-mentioned purpose of the present invention, the air Bubble generating apparatus that is provided comprises:
One is used for pump purt water and its central area produces a vacuum state when pump purt water pump;
A power source that is used for operating pumps; And
One is utilized the central area of pump under vacuum state and the feeder of the air feed in water of the pressure reduction between atmosphere.
Feeder comprises the quill shaft that an air circulates within it, and one is screwed into first valve gear of power source bearing and second valve gear that is positioned on second end of quill shaft near first end of quill shaft and with screw thread.
The quill shaft of feeder comprises the rotating shaft of power source.
The hollow space of the quill shaft of feeder is done tapered from first end to second end, therefore, when air flow through in hollow space, air velocity descended.
An air inlet is formed on first end of the quill shaft of feeder.
An exhaust outlet is formed on second end of the quill shaft of feeder, and one is used to admit the dimple of valve ball to be formed on exhaust outlet, and a frusto-conical valve seat is formed on exhaust outlet inside.
First valve gear is magnetic valve preferably.
Second valve gear is ball valve preferably.
Pump comprises an impeller and a shell, a cylindricality wheel hub is formed on the outer centre of impeller, an annular boss is formed on the middle part of the cylindricality wheel hub of impeller, and quill shaft second end of feeder is inserted in the cylindricality wheel hub, so formed the part of drawing water at the middle part of shell.
In addition, constitute many through holes at the impeller middle part around annular boss.
When pump turns round, because the rotation of described impeller, produce a vacuum pressure in the impeller, so produce a pressure reduction between the hollow space of described impeller and the inside, the valve ball that is contained in second valve gear between the annular boss of quill shaft second end and impeller middle part moves to boss, makes air communication cross through hole and enters impeller.
Power source comprises a cylindrical outer cover, is arranged on the inner rim of shell the stator of apart preset distance, and the rotor in cylindrical space that is installed in shell rotationally.Bearing is arranged in first opening of cylindrical space, and second opening of cylindrical space is covered by an end cap.
End cap comprises a cylindrical abutment part and a flange section.Periphery along cylindrical abutment is formed with one first groove, and one first circular seal ring is contained in the cylindrical abutment.An edge along the flange section of end cap is formed with one second groove, and one second circular seal ring is embedded in the flange section.The edge coupling mutually of the shell of pump and the flange section of end cap.
Be formed with screw thread on the inner circumferential surface of bearing, a bearing is contained on the position relative with a sidepiece of power source, and first valve gear is screwed on the screw thread of inner circumferential surface of bearing.
As mentioned above, when air Bubble generating apparatus of the present invention was installed and is used in crawl or fish jar, air periodically mixed with cycle water, thereby often keeps existing amount of oxygen in crawl or the fish jar.
On the other hand, air Bubble generating apparatus is installed and when being used in washing machine, and the laundry water that mixes mutually with bubble infeeds washing tub by a fluid passage when laundry, thereby has improved detersive efficiency.
Have, air Bubble generating apparatus of the present invention is used to the waste water supply air in Waste Water Treatment again, the oxidation operation that therefore makes in the waste water to be contained.
Above-mentioned purpose of the present invention and other advantages describe preferred embodiment in detail by the reference accompanying drawing will become more obvious.Among the figure:
Figure 1A and Figure 1B are respectively the air Bubble generating apparatus profile and the schematic perspective views of prior art.
Fig. 2 is the profile of an embodiment of air Bubble generating apparatus of the present invention.Among the figure, feeder and pump are connected as a single entity.
Fig. 3 is a partial enlarged drawing of the air Bubble generating apparatus of the present invention shown in Fig. 2, the detail drawing of first valve gear of expression feeder.
Below, the preferred embodiment that present invention will be described in detail with reference to the accompanying.
Fig. 2 is the cutaway view as an air Bubble generating apparatus 100 of the embodiment of the invention.In this embodiment, feeder 110 and pump 180 are connected as a single entity.Among Fig. 2, air Bubble generating apparatus 100 comprises a vacuum pump 180 of part in the central when being used for pump purt water and pump purt water, one is utilized the vacuum state of pump central portion and the feeder 110 of the air feed in water of the draught head between the atmosphere, air Bubble generating apparatus 100 also comprises power source 140 in addition, for example a motor is used to drive described pump 180.
Feeder 110 comprises the quill shaft 112 that air circulates therein, near first valve gear 200 of quill shaft 112 first ends installation, and second valve gear 114 that is installed in quill shaft 112 second ends.In addition, the quill shaft 112 of feeder 110 comprises the rotating shaft of power source 140.First valve gear 200 is magnetic valves, and second valve gear 114 is ball valves.
The quill shaft 112 of feeder 110 is rotating shafts of power source 140.Air inlet 116 is formed on first end of quill shaft 112, and exhaust outlet 118 is formed on second end of quill shaft 112.The hollow space of quill shaft 112 is done tapered from first end to second end, like this, air flows to the tapered hollow timesharing by air inlet 116 to exhaust outlet 118, and flow velocity descends gradually.
One is used to admit the dimple of valve ball to be formed on quill shaft 112 exhaust outlets 118 of feeder 110, and has a frusto-conical valve seat to be formed on the dimple that links to each other with the hollow space of quill shaft 112.The ball of ball valve is contained in the dimple, contacts with valve seat.The diameter of dimple is bigger slightly than valve ball, and this degree of depth that contains the dimple of valve seat is slightly less than the diameter of valve ball.
Fig. 3 is the partial enlarged drawing of the air Bubble generating apparatus of the present invention 100 shown in Fig. 2.It has clearly illustrated the structure of first valve gear 200 of feeder 110, comprises a shell 210 with reference to figure 3, the first valve gears 200, forms a gas circuit at the middle part by shell; A coil 214 is on the bobbin 212 that is installed on 210 li on shell; And the removable fuse 216 of cylindricality, it is arranged on 212 li of bobbins, and radially inwardly forms a shoulder at the edge near removable fuse 216.In addition, also have springs that are contained in first valve gear, 200 bobbins 212 to prop up part 218 and removable fuse 216 separates a predetermined spacing.Prop up on the part 218 at spring and to have through hole.
Connector 220 is connected by a side of bobbin 212 and spring and props up on the surface that a side of part 218 limited, and one is propped up first side that the identical through hole of through-hole diameter in the part 218 is formed on connector 220 with spring.The dimple 224 of an admittance valve body 222 is formed on second side of connector 220.Conical valve seat is formed on dimple 224 and the position that through hole links to each other.
One first end round bar 226 that valve body 222, second end blocked by the shoulder of the removable fuse 216 of cylindricality of ining succession props up part 218 and connector 220 by the removable fuse 216 of cylindricality, spring with stretching.Back-moving spring 228 is contained in the shoulder of removable fuse 216 and spring and props up in the removable fuse 216 of cylindricality between the part 218, and first valve gear 200 threadably is contained on the bearing 150.
First valve gear is periodically controlled by the ECU (not shown).When electric current supply coil 214, coil 214 is magnetized, and, electric current is sent to removable fuse 216, thereby valve body 222 opens, so the through hole that slit, the spring of air by air duct, bobbin 212 and 216 in removable fuse props up on part 218 and the connector 220 flows to 224 li of dimples.
With reference to figure 2, power source 140 comprises a cylindrical outer cover 142 again, is arranged on the inner rim of shell 142 stator 146 with an apart preset distance, and the rotor 148 in cylindrical space that is contained in shell 142 rotationally.Bearing 150 is embedded in first opening of cylindrical space of shell 142, and second opening of shell 142 is covered by an end cap 156.Bearing 152 is installed in first side of bearing 150, and first valve gear, 200 usefulness are threaded onto on second side of bearing 150.Periphery along bearing 150 is provided with groove.Bearing 150 is fixed on the shell 210, and an end of supporting rotor 148 rotating shafts.End cap 156 comprises cylindrical abutment part 168 and flange section 160.Periphery along bearing part 168 is provided with groove, and an annular air sealing ring is contained in the bearing part.Edge along end cap 156 flange sections 160 is formed with another groove, and an annular air sealing ring is embedded in flange section.
Thrust bearing 162 is contained in the rotating shaft between end cap 156 and the rotor 148.Thrust bearing 162 plays distribution and acts on axial load in the rotating shaft.
The annulus 164 of sealed stator 146 usefulness is embedded in respectively in the groove of bearing 150 and end cap 156, and respectively bearing 150, end cap 156 is sealed with shell 142, the stator casing 144 of power source 140, so that fluid can not enter the space of shell 142.
Pump 180 is centrifugal pumps, and it comprises impeller 182 and pump case 184.Cylindricality wheel hub 186 is formed on the centre on impeller 182 surfaces, and is relative with the outer surface of end cap 156.Boss 188 raises up from the middle part of wheel hub 186, also has the through hole (not shown) of many connection dimples and impeller 182 inside to form round boss 188.The cylindricality wheel hub 186 of impeller 182 is turning around second end location of the quill shaft 112 of feeder 110.
Boss 188 apart predetermined spacing of projection on ball that holds in the dimple on rotating shaft second end and the wheel hub 186.Like this, the valve ball of second valve gear 114 can move to boss 188, makes air flow into impeller 182 by through hole.
Pump case 184 is such, that is, pump mouth is formed on its middle part, and discharge outlet is formed on its edge.Pump case 184 is fixed on the edge of end cap 156 flange sections 160, and sealing ring 166 is loaded between end cap 156 and the pump case 184.
Below, be described in detail the running of air Bubble generating apparatus 100 each parts of the present invention.
In air Bubble generating apparatus 100 of the present invention, when to power source 140 power supplies, be connected in pump 180 runnings in power source 140 rotating shafts.After the pump running, water is by the pump mouth suction in the impeller 182 of pump 180.Because the centrifugal force that rotation produced of impeller 182, the water that is drawn into is discharged by the discharge outlet of impeller 182.
At this moment, impeller 182 middle parts become vacuum, so the pressure in the impeller 182 is lower than atmospheric pressure.Under this state, when first valve gear 200 of feeder 110 started, removable fuse 216 moved under the electromagnetic force effect, makes valve body 222 open, and air flows to quill shaft 112 by first valve gear 200.Therefore, produce a pressure reduction between the pressure at the pressure of the hollow space of quill shaft 112 and impeller 182 middle parts, and the valve ball of second valve gear 114 is moved towards the boss 188 that is formed in impeller 182 wheel hubs 186.Like this, the air that flows in the quill shaft 112 flows in the impeller 182 by the many through holes on second valve gear 114 and the impeller 182, and then, air mixes with cycle water and is discharged from pump 180.
Air Bubble generating apparatus 100 periodically provides sparkling cycle water by repeating to finish above-mentioned operation.
On the other hand, when pump 180 was out of service, the water that remains in the pump 180 flow back in the wheel hub 186 by the through hole in the impeller 182.In this case, the pressure that is arranged on the water that the ball valve 114 of quill shaft 112 second ends flowed back to is closed, and has stoped current to be got back in the quill shaft 112.
As mentioned above, when air Bubble generating apparatus of the present invention was installed and use at crawl or indoor fish jar, air periodically mixed with cycle water, made and often kept the amount of oxygen that exists in pond or the fish jar.
In addition, install and use in washing machine when air Bubble generating apparatus, when laundry, the laundry water that mixes with bubble has improved clean result thus by a fluid circuit supply washing tub.
Have, air Bubble generating apparatus of the present invention is used for the waste water supply air to Waste Water Treatment again, and the organic matter that contains in the waste water is oxidized thus.
Though the present invention carries out concrete demonstration and narration with reference to the embodiment of a uniqueness, those skilled in the art is clear, under the design of the present invention and range of condition that does not break away from claim and limited, and also can be to carrying out various variations on form and the details.

Claims (26)

1, a kind of air Bubble generating apparatus comprises:
One is used for pump purt water and is used for when pump purt water the vacuum pump in heart zone therein;
A power source that is used to drive described pump; And
The described central area of a utilization described pump under vacuum state and the device of the draught head air feed in described water between the atmosphere.
2, air Bubble generating apparatus according to claim 1, wherein, described feeder comprises the quill shaft of an air in the inside circulation, one is screwed into first valve gear of power source bearing and second valve gear that is installed in second end of quill shaft near first end of quill shaft and with screw thread.
3, air Bubble generating apparatus according to claim 2, wherein, the quill shaft of described feeder comprises the rotating shaft of a described power source.
4, air Bubble generating apparatus according to claim 3, wherein, the hollow space of the quill shaft of described feeder is done tapered from first end to second end, thereby when described air flow through hollow space, the flow velocity of air descended.
5, air Bubble generating apparatus according to claim 2, wherein, air inlet is formed on first end of described quill shaft of described feeder.
6, air Bubble generating apparatus according to claim 5, wherein, exhaust outlet is formed on second end of described quill shaft of described feeder, and a dimple that is used to hold valve ball is formed on described exhaust outlet, and a frusto-conical valve seat is formed on described exhaust outlet inside.
7, air Bubble generating apparatus according to claim 2, wherein, first valve gear is magnetic valve preferably.
8, air Bubble generating apparatus according to claim 2, wherein, second valve gear is ball valve preferably.
9, air Bubble generating apparatus according to claim 1, wherein, pump comprises an impeller and a shell, a cylindricality wheel hub is formed on the outer centre of described impeller, annular boss be formed on described impeller the middle part of fast cylindricality wheel hub, described quill shaft second end of described feeder injects in the cylindricality wheel hub, and has formed the part of drawing water at the shell middle part.
10, air Bubble generating apparatus according to claim 9 wherein, constitutes many through holes at the impeller middle part around annular boss.
11, air Bubble generating apparatus according to claim 10, wherein, when pump turns round, because the rotation of described impeller, in impeller, produce vacuum, so produce pressure reduction between the hollow space of described impeller and the inside, the described valve ball that is contained in described second valve gear between the annular boss of quill shaft second end and impeller middle part just moves to boss, makes air flow into described impeller by through hole.
12, air Bubble generating apparatus according to claim 1, wherein, described power source comprises: a cylindrical outer cover, be arranged on the inner rim of shell, the stator of apart preset distance, and the rotor in cylindrical space that is installed in shell rotationally, in power source, described bearing is arranged in first opening of shell cylindrical space, and second opening of cylindrical space is covered by an end cap.
13, air Bubble generating apparatus according to claim 12, wherein end cap comprises a cylindrical abutment part and a flange section, periphery along cylindrical abutment is formed with one first groove, one first circular air seal ring is contained in the cylindrical abutment, an edge along the flange section of end cap is formed with one second groove, one second circular air seal ring is embedded in the flange section, the edge of the flange section of the shell coupling end cap of pump.
14, air Bubble generating apparatus according to claim 13 wherein is formed with screw thread on the inner circumferential surface of bearing, and a bearing is contained on the position relative with the power source sidepiece, and first valve gear is screwed on the screw thread of inner circumferential surface of bearing.
15, a kind of air Bubble generating apparatus comprises:
A pump that is used for pump purt water and is used for a vacuum of the regional generation of the heart therein when pump purt water, described pump comprises an impeller and a shell, a cylindricality wheel hub is formed on the outer centre of described impeller, an annular boss is formed on the middle part of the cylindricality wheel hub of described impeller, and water inlet is formed on the centre of shell;
The power source of a driving pump, power source comprises a cylindrical outer cover, be arranged on the inner rim of shell, the stator of apart preset distance, and the rotor in cylindrical space that is installed in shell rotationally, bearing is embedded in first opening of shell cylindrical space, and second opening of cylindrical space is covered by an end cap; And,
Utilization is in the device of draught head air feed in water between the centre of vacuum state and the atmosphere, feeder comprises the quill shaft that an air circulates therein, one is screwed into first valve gear of power source bearing and second valve gear that is installed in quill shaft second end near first end of quill shaft and with screw thread.
16, air Bubble generating apparatus according to claim 15, wherein, the hollow space of the quill shaft of feeder is done tapered from first end to second end, thereby air velocity descends when air flows through in hollow space.
17, air Bubble generating apparatus according to claim 16, wherein, the hollow devices of feeder comprises the rotating shaft of a power source.
18, air Bubble generating apparatus according to claim 17, wherein, air inlet is formed on first end of quill shaft of feeder.
19, air Bubble generating apparatus according to claim 18, wherein, exhaust outlet is formed on second end of quill shaft of feeder, and one is used to admit the dimple of the valve ball of ball valve to be formed on exhaust outlet, and a frusto-conical valve seat is formed on exhaust outlet inside.
20, air Bubble generating apparatus according to claim 15, wherein, first valve gear is magnetic valve preferably.
21, air Bubble generating apparatus according to claim 15, wherein, second valve gear is ball valve preferably.
22, air Bubble generating apparatus according to claim 15 wherein, constitutes many through holes at the impeller middle part around annular boss.
23, air Bubble generating apparatus according to claim 22, wherein, when pump turns round, because the rotation of impeller, in impeller, produce a vacuum pressure, so produced a pressure reduction between impeller hollow space and the inside, the valve ball that is contained in second valve gear between the annular boss of quill shaft second end and impeller middle part just moves to boss, makes air flow into impeller by through hole.
24, air Bubble generating apparatus according to claim 23, wherein, power source comprises a cylindrical outer cover, be arranged on the inner rim of shell, the stator of an apart preset distance, and the rotor in cylindrical space that is installed in shell rotationally, wherein, bearing is inserted in first opening of shell cylindrical space, and second opening of cylindrical space is covered by an end cap.
25, air Bubble generating apparatus according to claim 24, wherein, end cap is made of a cylindrical abutment part and a flange section, periphery along cylindrical abutment is formed with one first groove, one first circular air seal ring is contained in the cylindrical abutment, an edge along the flange section of end cap is formed with one second groove, and one second circular air seal ring is embedded in the cylindrical abutment, the edge coupling mutually of the shell of pump and the flange section of end cap.
26, air Bubble generating apparatus according to claim 25 wherein, is formed with screw thread on the inner circumferential surface of bearing, and a bearing is contained on the position relative with a sidepiece of power source, and first valve gear is screwed on the screw thread of inner circumferential surface of bearing.
CN 96122788 1996-09-30 1996-09-30 Air Bubble generating apparatus Pending CN1178069A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 96122788 CN1178069A (en) 1996-09-30 1996-09-30 Air Bubble generating apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 96122788 CN1178069A (en) 1996-09-30 1996-09-30 Air Bubble generating apparatus

Publications (1)

Publication Number Publication Date
CN1178069A true CN1178069A (en) 1998-04-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN 96122788 Pending CN1178069A (en) 1996-09-30 1996-09-30 Air Bubble generating apparatus

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109957904A (en) * 2017-12-14 2019-07-02 博西华电器(江苏)有限公司 Clothing care machine
CN113693007A (en) * 2021-08-13 2021-11-26 北京理工大学 Fish tank with oxygen supply self-circulation system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109957904A (en) * 2017-12-14 2019-07-02 博西华电器(江苏)有限公司 Clothing care machine
CN113693007A (en) * 2021-08-13 2021-11-26 北京理工大学 Fish tank with oxygen supply self-circulation system
CN113693007B (en) * 2021-08-13 2022-04-19 北京理工大学 Fish tank with oxygen supply self-circulation system

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