CN2333398Y - High-frequency, low-temp. plasma disinfecting and sterilizing apparatus - Google Patents
High-frequency, low-temp. plasma disinfecting and sterilizing apparatus Download PDFInfo
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- CN2333398Y CN2333398Y CN 98217467 CN98217467U CN2333398Y CN 2333398 Y CN2333398 Y CN 2333398Y CN 98217467 CN98217467 CN 98217467 CN 98217467 U CN98217467 U CN 98217467U CN 2333398 Y CN2333398 Y CN 2333398Y
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Abstract
The utility model relates to a high-frequency, low-temperature plasma disinfecting and sterilizing apparatus. The utility model is characterized in that a metal cooling electrode and a metal shell which are arranged in a container are used as two electrodes that produce the plasma and are connected with the output end of the high-frequency power, and the working material of the plasma is hydrogen peroxide. The metal cooling electrode is formed by putting coolant into a hollow metal tube. Two vacuum valves are installed between a vacuum pump and the metal container. The utility model has the advantages of simple operation, no toxicity and no pollution, which can be used for the high efficiency quick sterilization of medical appliances, sanitary materials, paper, foods and dishes.
Description
This utility model relates to method for disinfection and sterilization and the equipment in the medicine and hygiene fields, and plasma applicating technology field.
The material property and the construction features thereof of endoscopies such as dental mirror, gastroscope, intestinal mirror and medical diagnostic equipments such as artificial intraocular lenses's sheet and some rubber plastic pipe make their sterilization can not adopt traditional High Temperature High Pressure means, can not simply adopt irradiation or chemical method.Because of this class apparatus can not sufficiently sterilised the sterilization cross infection and the malpractice that cause be the difficult problem of puzzlement medical and health sector always.Up to the present also fail to find a kind of efficient ways to solve.
A kind of cold plasma disinfection apparatus that Chinese patent publication number CN1093284A proposes, owing to adopt the HVDC discharge, its electrode easily produces sputter and can generate precipitate on the apparatus surface, the working gas that is adopted also can generate precipitate on the apparatus surface under action of plasma, this class precipitate is difficult to remove, and it directly has influence on the use of apparatus; And the direct-current discharge ionizing efficiency is low, and sterilization effect is poor; In addition the heat that produces because of electrion can not discharger outside, can cause damage to the apparatus that is unsuitable for high-temperature process (as the optical element of gastroscope, intestinal mirror and photoelectronic imaging parts etc.); The running voltage of this method is the 300-1000 volt, can constitute potential threat to personal security.In JIUYUE, 1992 U.S. " hygienic material Journal of Management " (Journal ofhealthcare material management, September 1992, P46) a kind of microwave discharge plasma disinfection technology that provides, obviously this method is not suitable for metal and the sterilization that contains the apparatus of metal assembly.Ultraviolet sterilization method commonly used then to ultraviolet radiation less than place such as tube cavity or have the slit part and do not have disinfective action.
The purpose of this utility model provides a kind of high frequency low-temperature plasma sterilization bactericidal unit, to overcome the above-mentioned defective of prior art.
Accompanying drawing 1 is the structural principle sketch map of this utility model high frequency low-temperature plasma sterilization bactericidal unit.
This high frequency low-temperature plasma sterilization bactericidal unit is characterized in that comprising following part Consist of: canister 1 offers on this container and puts, gets that sterilizing objects is used and energy vacuum seal Door; Vacuum meter 8 is connected with canister 1; Splendid attire plasma operation material hydrogen peroxide Container 9 and canister 1 between be connected by valve 10; Be arranged on container 1 interior axis Metal cooling electrode 2 on the line direction and the metal shell of container 1 be respectively as two electrodes, with Two outputs of high frequency electric source 3 are connected, and consist of the high-frequency discharge loop, canister 1 shell Ground connection; The output services voltage of high frequency electric source 3 is that 30～100 volts, discharge power are by the metal container 1 volume is not less than 5mW/cm3, operating frequency is 8～25MHz; Described metal cooling electrode 2 Consist of with the metal tube of inside by cooling agent; One end of metal tube is coolant entrance, the other end Be the outlet of cooling agent, be connected with cooling agent feeder 4 respectively; Vavuum pump 5 and canister Two vacuum valves 6 and 7 are housed between 1 successively; Be provided with in the canister 1 and put or hang The support 11 of the insulation that sterilizing objects is used.
Described metal cools electrode 2 can hollow metal tube curve helical form or n shape, metal tube inside constitutes by coolant, also can be by constituting by coolant in the two coaxial metal pipe interlayers; Described coolant can adopt water usually, also can adopt other coolant; When coolant adopted water, the coolant entrance of metal cools electrode 2 metal tubes was connected with feed pipe.
This utility model device can be provided with air filter 12, between it and the canister 1 valve 13 is housed, and is connected by pipeline; The filter course of air filter can adopt multilamellar papery, cotton or chemical fibre kind fabric, non-woven fabrics or filter sand table and constitute.
The shape of canister 1 can be designed to shapes such as cylindrical shape, spheroidal or rectangle according to actual conditions and actual needs; The material of canister 1 is generally selected rustless steel for use, also can select other alloy material for use; As the metal wall of the container 1 of one of this device high-frequency discharge electrode, also can adopt to be designed to strip or net metal structure electrode and to substitute attached to the form of (inside and outside all can) on the nonmetallic vessel wall.
Also can be provided with watch window on the housing of canister 1.
This utility model disinfector uses mode of operation as follows:
With the laying for goods that needs sterilization to handle or be suspended on the support 11 in the canister 1; Close vacuum seal behind the door, started vacuum pump 5, opened vacuum valve 6 successively earlier, opened vacuum valve 7 again; Reach 2000Pa when following by pressure in the vacuometer 8 observation containers 1, close vacuum valve 7 successively earlier, close vacuum valve 6 again; Open valve 10 then, be diffused into whole space in the container 1 after the hydrogen peroxide in the container 9 is promptly vaporized; No longer moving by vacuometer 8 observation pointers is after container 1 interior pressure reaches balance, starting high frequency electric source 3, is that 30～100 volts, discharge power are not less than 5mW/cm by the volume of metal container 1 when being applied to high frequency voltage between container 1 metal wall and the metal cools electrode 2
3, when frequency is 8～25MHz, can produce needed plasma; Observe according to the output indication of high frequency electric source 3 or by the watch window on the container 1, can judge whether plasma is arranged in the container 1; At dissimilar antibacterials or virus, can finish the sterilization overall process in 5 to 15 minutes after the general plasma generation.Pollute for avoiding airborne antibacterial that the article of having disinfected are caused once more, before taking out article, must open the valve 13 between container 1 and the air filter 12 earlier, put into through the air after filtering, after making container 1 inside and outside pressure reach balance, open the vacuum seal door again and take out article.
The disinfection operation principle of this device is as follows:
After being evacuated by vacuum pump 5 in the canister 1, open valve 10, liquid hydrogen peroxide promptly is vaporized and diffuses to whole space in the container 1; Hydrogen peroxide has stronger bactericidal action, can kill the part bacterial virus on processed article surface in the hydrogen peroxide diffusion process; After adding high frequency voltage between container 1 metal wall and the metal cools electrode 2, be diffused in plasma operation material hydrogen peroxide in the container 1 under the effect of high-frequency electric field, be dissociated into charged particle, form plasma, oxygen-derived free radicals and ultraviolet, the then comprehensive environment of killing that has constituted antibacterial or virus.According to molecular biological viewpoint, antibacterial and virus are charged, electric charge on the human cell membrane helps the absorption of cell to nutrient substance, but work as the time spent of doing that antibacterial or virocyte are subjected to charged particle, CHARGE DISTRIBUTION on it is damaged, will directly influence the physiological activity and the metabolism of antibacterial or virocyte, finally cause death.Remaining bacterial virus is under effect, bombardment and the ultraviolet irradiation of plasma electromagnetic field of high frequency, high energy particle, oxygen-derived free radicals on the processed article surface, its CHARGE DISTRIBUTION is thoroughly destroyed, cell wall, nucleus are caused bacterial virus dead at once by electrical breakdown.Owing to pass through cooling water or other coolant in the cooling electrode 2 of hollow, the temperature of the coolant that adjusting is passed through, can make the temperature maintenance in the container 1 at needed lower temperature, this structural behaviour that has just realized that Yin Gaowen neither changes processed article can reach sterilized purpose again.
This utility model compared with prior art has following advantage:
Because this utility model is selected the low pressure high-frequency discharge for use, initial running voltage is 30～100 volts, available 40 volts of general normal use, and these 300～1000 volts of voltages more than existing HVDC electric discharge are much lower, use safer; And the low-voltage high-frequency discharge can not produce the discharge of similar HVDC and generate the pollution to processed article such as precipitate on the apparatus surface because of electrode surface sputter and working gas under action of plasma.
Because the metal electrode in this utility model disinfector has adopted cooling structure, temperature when making system works is in the temperature of inlet coolant basically, and the heat of having avoided existing high direct voltage electric discharge to produce because of electrode can not in time distribute and exist the danger that processed article is caused damage.
Because this utility model device adopts high-frequency discharge, can reach 0.3-0.4% to the ionisation of gas rate, be higher than the ionization rate 0.1-0.2% of existing direct-current discharge method; Therefore the content of charged particle, ultraviolet rays and oxygen-derived free radicals is multiplied in the plasma, has accelerated " bacteriolyze " process, promotes the death of antibacterial or virocyte fast, and sterilization effect is good.
Because the initial pressure of this utility model high frequency low-temperature plasma sterilization bactericidal unit only needs below the 2000Pa, required 1.33-500Pa reaches easily than existing HVDC electric discharge, thereby can significantly reduce the required time of evacuation, shorten the working cycle of container, improved the utilization rate of device.
The operation material that this utility model disinfector is selected for use is by the harmless hydrogen peroxide of whole world generally recognized as safe, it can not produced polluter before and after the plasma disassociation, can not be sterilized apparatus surface generation precipitate or destroy its surface, overcome existing high direct voltage electric discharge because of working gas (as argon, nitrogen and oxygen etc.) ionization produces under electrion high-energy particle bombardment electrode surface and produce sputter, the electrodeposition substance that makes electrode surface is to being sterilized article surface, especially optical fiber and glass-like materials surface precipitation thing and the damage that is sterilized article that directly causes.
This utility model high frequency low-temperature plasma sterilization bactericidal unit, the efficient quick sterilization of simple to operation, nontoxic, pollution-free, energy.Except that the sterilization that can be used for medical apparatus and instruments, also can be used for industry or work that hygienic material, paper, food and tableware etc. need sterilization.
The operation of this utility model high frequency low-temperature plasma sterilization bactericidal unit also can realize automatically by control circuit.
Specify embodiment of the present utility model below in conjunction with accompanying drawing 1.
One be equipped with the vacuum seal door, inside radius is 7.5cm, high in the cylindrical rustless steel container 1 of 17cm, a spiral type cooling electrode 2 of being made by the hollow stainless steel tube wherein is installed on the axis direction, the two ends of stainless steel tube be fixedly mounted on container 1 the bottom and with container 1 insulating flat board on; Stainless steel tube is inner, and one of its two-port can be joined with the tap water supply pipe as water inlet by cooling water, and the another port is coolant outlet (the recyclable utilization of cooling water).The metal wall of canister 1 and the metal tube of metal cools electrode 2 join as two electrodes of high-frequency discharge and the outfan of high frequency electric source 3 respectively; Canister 1 earthing of casing.
Between vacuum pump 5 and the canister 1 vacuum valve 6 and 7 are installed successively; Its job order is: after vacuum pump 5 is opened normally, open vacuum valve 6 earlier, open vacuum valve 7 again; When system quit work, the order of closing vacuum valve was opposite with opening sequence: close vacuum valve 7 earlier, after close vacuum valve 6, close vacuum pump 5 at last.Its objective is and prevent that the pumping fluid vapor diffusion from polluting in container 1.
Vacuometer 8 is connected with canister 1.
Between the container 9 of splendid attire plasma operation material hydrogen peroxide and the canister 1 valve 10 is housed, is connected by pipeline.
But insulating support 11 is installed in the space layering between metal cools electrode 2 and canister 1 wall, can the placement device ware on it, down hook or clip can be installed, and be used for hanging or the clamping apparatus.Distance between support can be regulated as required.
With needing the laying for goods of sterilization processing or being suspended on the support 11, closed vacuum seal behind the door, start vacuum pump 5, open vacuum valve 6 and 7 successively; When pressure in the container 1 reaches (can pass through vacuometer 8 observes) below the 2000Pa, close vacuum valve 7 and 6 successively; Open container 9 that hydrogen peroxide is housed and the valve 10 between the canister 1, be diffused into whole space in the canister 1 after hydrogen peroxide is promptly vaporized; Observe after pressure in the container 1 reaches balance by vacuometer 8, start high frequency electric source 3; It is that 50 volts, electric current are that 0.4 ampere, frequency are 13.56MHz that present embodiment medium-high frequency power supply 3 is applied to high frequency voltage between canister 1 and the metal cools electrode 2; Can be observed the plasma that produces the container 1 by the output indication of high frequency electric source 3 or from container 1 watch window; At different antibacterials or virus, can finish the sterilization overall process completely in 5 to 15 minutes after the general plasma generation.Before taking-up has been sterilized the article of sterilization treatment, pollute for reducing once more, should open the valve 13 between canister 1 and the air filter 12 earlier, put filtered air into, after making container 1 inside and outside pressure reach balance, open the vacuum seal door again and take out article.
This utility model high frequency low-temperature plasma sterilization bactericidal unit is in the confirmation of testing of life sciences institute of China Science ﹠ Technology University, antibacterial such as Aspergillus flavus to artificial culture in apparatus, the vessel, use native system to handle after 5 minutes, cultivate check and find that antibacterial all kills; Use the native system processing after 12 minutes for escherichia coli, cultivate check and find that antibacterial all kills.
Claims (4)
1, a kind of high frequency low-temperature plasma sterilization bactericidal unit is characterized in that comprising as the lower part constituting: canister 1, offer on this container put, cancel poisonous substance product usefulness and can be vacuum-packed door; Vacuometer 8 is connected with canister 1; Be connected by valve 10 between the container 9 of splendid attire plasma operation material hydrogen peroxide and the canister 1; Be arranged on the metal cools electrode 2 on the direction of axis in the container 1, the metal shell of this metal cools electrode 2 and canister 1 produces two electrodes of plasma respectively as high-frequency discharge, be connected with two outfans of high frequency electric source 3, constitute the high-frequency discharge loop, canister 1 earthing of casing; The output services voltage of high frequency electric source 3 is that 30～100 volts, discharge power are not less than 5mW/cm by the volume of metal container 1
3, operating frequency is 8～25MHz; Described metal cools electrode 2 constitutes with the metal tube of inside by coolant; Coolant gateway, metal tube two ends is connected with coolant feeder 4 respectively; Two vacuum valves 6 and 7 are housed between vacuum pump 5 and the canister 1 successively; Be provided with in the canister 1 and put or hang the insulating support 11 that sterilizing objects is used.
2, high frequency low-temperature plasma sterilization bactericidal unit according to claim 1, be characterised in that metal tube that described metal cools electrode 2 can hollow curves helical form or n shape, metal tube inside constitutes by coolant, also can be by constituting by coolant in the two coaxial metal pipe interlayers; When coolant adopted water, described metal cools electrode 2 metal tube coolant entrances were connected with feed pipe.
3, high frequency low-temperature plasma sterilization bactericidal unit according to claim 1 is characterised in that described canister 1 is provided with air filter 12, between it and the canister 1 valve 13 is housed; The filter course of air filter adopts multilamellar papery, cotton or chemical fibre kind fabric, non-woven fabrics or filters sand table and constitutes.
4, high frequency low-temperature plasma sterilization bactericidal unit according to claim 1, be characterised in that the metal wall of described container 1 as one of this device high-frequency discharge electrode, can adopt to be designed to strip or net metal structure electrode and to substitute attached to the form of (inside and outside all can) on the nonmetallic vessel wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98217467 CN2333398Y (en) | 1998-07-23 | 1998-07-23 | High-frequency, low-temp. plasma disinfecting and sterilizing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98217467 CN2333398Y (en) | 1998-07-23 | 1998-07-23 | High-frequency, low-temp. plasma disinfecting and sterilizing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2333398Y true CN2333398Y (en) | 1999-08-18 |
Family
ID=33970058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 98217467 Expired - Fee Related CN2333398Y (en) | 1998-07-23 | 1998-07-23 | High-frequency, low-temp. plasma disinfecting and sterilizing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2333398Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716583B (en) * | 2009-12-24 | 2011-10-19 | 南京医科大学 | Method for removing contaminants on surface of dental root canal file |
| CN103533876A (en) * | 2011-02-08 | 2014-01-22 | 迈科工程有限责任两合公司 | Cleaning apparatus for cleaning articles |
| CN104117078A (en) * | 2014-08-08 | 2014-10-29 | 天津市圣宁生物科技有限公司 | Electronic laryngoscope disinfector |
| CN106252295A (en) * | 2016-08-31 | 2016-12-21 | 国家电网公司 | Direct-current transmission converter valve cooling water channel and electrode thereof and metal electrode body |
-
1998
- 1998-07-23 CN CN 98217467 patent/CN2333398Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101716583B (en) * | 2009-12-24 | 2011-10-19 | 南京医科大学 | Method for removing contaminants on surface of dental root canal file |
| CN103533876A (en) * | 2011-02-08 | 2014-01-22 | 迈科工程有限责任两合公司 | Cleaning apparatus for cleaning articles |
| US9452099B2 (en) | 2011-02-08 | 2016-09-27 | Meiko Maschinenbau Gmbh & Co. Kg | Cleaning apparatus for cleaning articles |
| CN104117078A (en) * | 2014-08-08 | 2014-10-29 | 天津市圣宁生物科技有限公司 | Electronic laryngoscope disinfector |
| CN104117078B (en) * | 2014-08-08 | 2016-08-31 | 天津市圣宁生物科技有限公司 | A kind of electrolaryngoscope sterilizing machine |
| CN106252295A (en) * | 2016-08-31 | 2016-12-21 | 国家电网公司 | Direct-current transmission converter valve cooling water channel and electrode thereof and metal electrode body |
| CN106252295B (en) * | 2016-08-31 | 2018-12-07 | 国家电网公司 | Direct-current transmission converter valve cooling water channel and its electrode and metal electrode body |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |