GB2237961A - An ozone generator for a fish tank - Google Patents
An ozone generator for a fish tank Download PDFInfo
- Publication number
- GB2237961A GB2237961A GB9023706A GB9023706A GB2237961A GB 2237961 A GB2237961 A GB 2237961A GB 9023706 A GB9023706 A GB 9023706A GB 9023706 A GB9023706 A GB 9023706A GB 2237961 A GB2237961 A GB 2237961A
- Authority
- GB
- United Kingdom
- Prior art keywords
- ozone generator
- ozone
- discharge device
- fish tank
- air
- 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.)
- Granted
Links
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 title claims abstract description 70
- 241000251468 Actinopterygii Species 0.000 title claims abstract description 33
- 239000003990 capacitor Substances 0.000 claims abstract description 15
- 229910052754 neon Inorganic materials 0.000 claims abstract description 11
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000203 mixture Substances 0.000 claims abstract description 8
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 7
- 229910052710 silicon Inorganic materials 0.000 description 7
- 239000010703 silicon Substances 0.000 description 7
- 101100365087 Arabidopsis thaliana SCRA gene Proteins 0.000 description 6
- 101150105073 SCR1 gene Proteins 0.000 description 6
- 101100134054 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) NTG1 gene Proteins 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 238000012216 screening Methods 0.000 description 3
- 230000035943 smell Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000012799 electrically-conductive coating Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/042—Introducing gases into the water, e.g. aerators, air pumps
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B13/00—Oxygen; Ozone; Oxides or hydroxides in general
- C01B13/10—Preparation of ozone
- C01B13/11—Preparation of ozone by electric discharge
- C01B13/115—Preparation of ozone by electric discharge characterised by the electrical circuits producing the electrical discharge
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/10—Dischargers used for production of ozone
- C01B2201/12—Plate-type dischargers
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/20—Electrodes used for obtaining electrical discharge
- C01B2201/22—Constructional details of the electrodes
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/30—Dielectrics used in the electrical dischargers
- C01B2201/34—Composition of the dielectrics
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2201/00—Preparation of ozone by electrical discharge
- C01B2201/60—Feed streams for electrical dischargers
- C01B2201/62—Air
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Environmental Sciences (AREA)
- Marine Sciences & Fisheries (AREA)
- Animal Husbandry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Oxygen, Ozone, And Oxides In General (AREA)
Abstract
An ozone generator (2) for a fish tank (4), comprises a gas (e.g. neon) filled discharge device 6 forming a dielectric, an anode 8 extending from the discharge device 6, a cathode 10 positioned around the outside of the discharge device 6, capacitor discharge means 26 for feeding a needle pulsed voltage to the anode 8, and connector means (28) for connecting the ozone generator (2) in an air line (30) of the fish tank (4), the ozone generator (2) being such that in use air in the air line (30) enters the ozone generator (2) and, when a high voltage is applied to the anode 8, ozone is generated at the cathode 10 to produce a mixture of air and ozone for the fish tank (4). <IMAGE>
Description
AN OZONE GENERATOR FOR A FISH TANK
This invention relates to an ozone generator for a fish tank.
Ozone generators for fish tanks are known.
The known ozone generators for fish tanks are not always satisfactory in that they are bulky and/or not especially economical to run.
It is an aim of the present invention to provide an ozone generator for a fish tank, which ozone generator is both small and economical to run.
Accordingly, this invention provides an ozone generator for a fish tank, which ozone generator comprises a gas filled discharge device forming a dielectric, an anode extending from the discharge device, a cathode positioned around the outside of the discharge device, capacitor discharge means for feeding a needle pulsed voltage to the anode, and connector means for connecting the ozone generator in an air line of the fish tank, the ozone generator being such that in use air in the air line enters the ozone generator and, when a high voltage is applied to the anode, ozone is generated at the cathode to produce a mixture of air and ozone for the fish tank.
The ozone from the ozone generator may be effective to reduce smells from the fish tank, and to make the water in the fish tank crystal clear. The ozone is generated at low levels so that it cannot harm persons using the ozone generator. Nevertheless, the generated ozone is able to destroy bacteria and viruses in the fish tank. The ozone does not have any adverse affect on the fish in the fish tank.
The ozone generator will mainly be used with fish tanks having fresh water for fresh water fish.
However, if desired, the fish tank may contain salt water.
The ozone may act to stabilize the water and plant life in the fish tank and to prevent the formation of bacteria, viruses and smells.
The ozone generator of the present invention may be produced to operate very economically. For example, the ozone generator may be arranged to operate on one watt of power. Furthermore, the ozone generator is very simple to use and instal, since the ozone generator only needs to be inserted into the air line to the fish tank.
The discharge device is preferably a discharge tube. Other types of discharge device may however be employed.
The discharge device will usually be filled with neon so that the gas filled discharge device will then be a neon filled discharge device. Other inert gases may however be employed in the discharge device.
The cathode may be a wire which is wound around the outside of the discharge device. The cathode may be of other constructions if desired.
Preferably, the connector means comprises an inlet tube for the air and an outlet tube for the mixture of air and ozone.
The ozone generator may include a high tension electrical generator for feeding mains voltage to the discharge device.
An embodiment of the invention will now be described solely by way of example and with reference to the accompanying drawings in which:
Figure 1 shows an ozone generator installed in an air line to a fish tank;
Figure 2 shows part of the ozone generator;
Figure 3 shows the electrical circuit of the ozone generator;
Figure 4 shows the physical layout of the circuit parts shown in Figure 3; and
Figure 5 shows the rear of the ozone generator shown in Figure 1.
Referring to the drawings, there is shown an ozone generator 2 for a fish tank 4. The ozone generator 2 comprises a gas filled discharge device 6 forming a dielectric. An anode 8 is sealed into and extends from the discharge device 6. A cathode in the form of a wire 10 is wound around the outside of the discharge device 6. The discharge device 6 is in the form of a tube 12 which is filled with neon gas 14. The anode 8 has a part 16 which is provided inside the tube 12 and which is surrounded by the neon gas 14. A cathode connection 18 is attached to the wire 10 as shown.
The circuit for the ozone generator 2 is shown in Figure 3. In Figure 3, there is shown a mains supply 20 which is connected to a rectifier 22 via a resistance R1 and a capacitor C1. The rectifier 22 is connected to two neon lamps NE1 and NE2. The neon lamps NE1 and NE2 are connected in series with a resistance R2.
The apparatus so far described forms a power supply circuit 24. In the power supply circuit 24, the capacitor C1 acts as a resistor to limit the current through the circuit. The rectifier 22 is a diode bridge rectifier.
The resistance R2 is connected to a silicon controlled rectifier SCR1 as shown. The silicon controlled rectifier is itself connected to a capacitor C3 and the primary winding L1 of a transformer T1. The silicon controlled rectifier SRl,the capacitor C3 and the primary winding L1 of the transformer T1 form a capacitor discharge circuit 26. The neon lamps NE1 and NE2 form a trigger device which is able to trigger the silicon control rectifier SCR1 as will be seen from Figure 3.
The transformer T1 is connected as shown to two of the discharge devices 6. If desired only one of the discharge devices 6 need be employed.
Figure 4 shows the layout of the circuit parts described above with reference to Figure 3. As will be seen, many of the parts are mounted on a printed circuit board 26. The various components may be sealed by being potted in an epoxy compound. Thus, in the event that the ozone generator 2 should become wet, for example if it is inadvertently dropped into the fish tank 4, the various sealed parts will not become damaged.
Figure 5 shows the rear of the ozone generator 2.
It will be seen that the rear of the ozone generator 2 is provided with connector means 28 for connecting the ozone generator 2 in an air line 30 for the fish tank 4. More specifically, the connector means 28 comprises an inlet tube 32 for air, and an outlet tube 34 for a mixture of air and ozone.
The capacitor discharge circuit 26 forms capacitor discharge means for feeding a needle pulsed voltage to the anode 8 of each of the discharge devices 6.
More specifically, during operation of the ozone generator 2, a mains supply of 240 volts d.c. is supplied via the resistance R1 and the capacitor C1 to the bridge rectifier 8. The power supply is powered from a full wave unsmoothed d.c. voltage to the silicon controlled rectifier SCR1 pulse firing circuit which includes the two neon lamps NEl and NE2 feeding a negative d.c. supply via the resistance R2.The resistance R2 is calculated so as to limit the average forward current of the silicon controlled rectifier SCR1, which should be kept below the cut-off current of the silicon controlled rectifier SCR1. The circuit runs at a pulse repetition rate of 100Hz, producing two 20 microsecond needle pulses every 10 milliseconds.
As the full wave d.c. voltage rises from zero potential through to trigger voltage (VT1), 180 volts approximately, a current (Ic) will charge capacitor C3 to Vc. This is represented as follows:
Vc = VT1/2 - Vg Vg = 1.2 volts VT1/2 = 180 volts.
When the trigger threshold is reached NE1 and
NE2 will conduct, causing a gate current to be injected into the SCR1, which will consequently conduct, causing a rapid discharge of the stored charged on capacitor C3.
Both rapid charge and discharge of C3 cause a large current pulse in primary of transformer L1. T1 being a pulse transformer steps up the pulses to the required 4KV PK-PK.
EXAMPLE VO = Vc X N N = NS = 250 = 25 - 10 VO = (180 - 1.2) 25
Vc = 4440 volts (RZ) is the circuit losses which will consist of, the SCR oON' resistance and the copper losses of (L1)
These are negligible and consequently quite large currents will flow (25 amps or more). Therefore, the discharge circuit path should be kept to a minimum.
L = 100
C = 0.22
XL = 2PiFL = 21.31 OHMS
XC = 2PiFC = 21.32 OHMS
Q = XL = 21.32 =
= 733.8
RZ 0.02904
The resistance R1 is not a standard resistor and it is a reactance of the capacitor C1, which at mains frequency will be a value of 0.47 for 32mA current.
During operation of the ozone generator 2, it will be inserted in the air line 30 to the fish tank 4 as shown in Figure 1. Air will be supplied along the air line 30 via a pump 56. The mixture of ozone and air passing out of the outlet tube 34 then passes into the fish tank 4. More specifically, the outlet end of the air line 30 is connected to an air stone 38 from which the mixture of ozone and air will bubble upwardly along a tube 40 as shown. Fish 42 in the fish tank 4 as well as plants 44 will benefit from the ozone in the air and the formation of bacteria and viruses will be substantially reduced or completely prevented. The water 46 in the fish tank 4 will remain very clear for long periods of time and, for example, it may not be necessary to change the water for periods of up to one year.Any smells tending to come from the water 46 will be substantially eliminated by the ozone. In addition, the ozone generator 2 operates on a very low current and it is thus extremely economical to run.
It is to be appreciated that the embodiment of the invention described above with reference to the accompanying drawings has been given by way of example only and that modifications may be effected. Thus, for example, the discharge device 6 may be tubular and a gas other than neon may be employed. Also, a cathode other than the wire 10 may be employed. If desired, the ozone generator may include screening means for facilitating the prevention of any electrical interference. For example, the ozone generator may be provided in a box which is sprayed or coated on its inside with a metal or plastics electrically conductive coating in order to provide the required screening means. Alternatively, the screening means may be effected by a foil lining to the box, for example of aluminium.
In order to prevent electrical pulse interference leaking from the ozone generator along a power line, for example from a box in which the component parts of the ozone generator are housed, there may be provided an electrical filter in the power line with a capacitor to ground. Other methods of filtering noise from the power line may be employed.
Claims (7)
1. An ozone generator for a fish tank, which ozone generator comprises a gas filled discharge device forming a dielectric, an anode extending from the discharge device, a cathode positioned around the outside of the discharge device, capacitor discharge means for feeding a needle pulsed voltage to the anode, and connector means for connecting the ozone generator in an air line of the fish tank, the ozone generator being such that in use air in the air line enters the ozone generator and, when a high voltage is applied to the anode, ozone is generated at the cathode to produce a mixture of air and ozone for the fish tank.
2. An ozone generator according to claim 1 in which the discharge device is a discharge tube.
3. An ozone generator according to claim 1 or claim 2 in which the discharge device is filled with neon.
4. An ozone generator according to any one of the preceding claims in which the cathode is a wire which is wound around the outside of the discharge device.
5. An ozone generator according to any one of the preceding claims in which the connector means comprises an inlet tube for the air and an outlet tube for the mixture of air and ozone.
6. An ozone generator according to any one of the preceding claims and including a high tension electrical generator for feeding mains voltage to the discharge device.
7. An ozone generator for a fish tank, substantially as herein described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9023706A GB2237961B (en) | 1989-11-07 | 1990-10-31 | A fish tank having an ozone generator |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB898925084A GB8925084D0 (en) | 1989-11-07 | 1989-11-07 | An ozone generator for a fish tank |
| GB9023706A GB2237961B (en) | 1989-11-07 | 1990-10-31 | A fish tank having an ozone generator |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB9023706D0 GB9023706D0 (en) | 1990-12-12 |
| GB2237961A true GB2237961A (en) | 1991-05-15 |
| GB2237961B GB2237961B (en) | 1994-08-17 |
Family
ID=26296169
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB9023706A Expired - Fee Related GB2237961B (en) | 1989-11-07 | 1990-10-31 | A fish tank having an ozone generator |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2237961B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20132008A1 (en) * | 2013-12-02 | 2015-06-03 | Air Liquide Italia S P A | METHOD AND PLANT TO INJECT OZONE IN TANKS OF PISCICULTURE OR AQUACULTURE IN GENERAL |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB757899A (en) * | 1953-02-23 | 1956-09-26 | Read Air Purification Company | Improvements in or relating to ozonisers |
| GB780476A (en) * | 1953-05-11 | 1957-08-07 | Walter Instr Ltd | Improvements in and relating to apparatus for the production of ozone |
| GB1235766A (en) * | 1968-12-30 | 1971-06-16 | Puromatic Inc | Treatment of fluids by electrical discharge |
| GB1549272A (en) * | 1975-03-13 | 1979-08-01 | Union Carbide Corp | Method for conducting corona discharge reactions |
| EP0104739A1 (en) * | 1982-09-29 | 1984-04-04 | Am-Air Limited Partnership | Air ionizer for internal combustion engines |
| US4682266A (en) * | 1985-04-22 | 1987-07-21 | National Distillers And Chemical Corporation | Ozonator power supply employing a current source inverter |
-
1990
- 1990-10-31 GB GB9023706A patent/GB2237961B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB757899A (en) * | 1953-02-23 | 1956-09-26 | Read Air Purification Company | Improvements in or relating to ozonisers |
| GB780476A (en) * | 1953-05-11 | 1957-08-07 | Walter Instr Ltd | Improvements in and relating to apparatus for the production of ozone |
| GB1235766A (en) * | 1968-12-30 | 1971-06-16 | Puromatic Inc | Treatment of fluids by electrical discharge |
| GB1549272A (en) * | 1975-03-13 | 1979-08-01 | Union Carbide Corp | Method for conducting corona discharge reactions |
| EP0104739A1 (en) * | 1982-09-29 | 1984-04-04 | Am-Air Limited Partnership | Air ionizer for internal combustion engines |
| US4682266A (en) * | 1985-04-22 | 1987-07-21 | National Distillers And Chemical Corporation | Ozonator power supply employing a current source inverter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ITMI20132008A1 (en) * | 2013-12-02 | 2015-06-03 | Air Liquide Italia S P A | METHOD AND PLANT TO INJECT OZONE IN TANKS OF PISCICULTURE OR AQUACULTURE IN GENERAL |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9023706D0 (en) | 1990-12-12 |
| GB2237961B (en) | 1994-08-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 732E | Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977) | ||
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20071031 |