CN1303364C - Microwave electrodeless discharging ultra violet ray disinfectant microwave oven - Google Patents
Microwave electrodeless discharging ultra violet ray disinfectant microwave oven Download PDFInfo
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- CN1303364C CN1303364C CNB2004100401376A CN200410040137A CN1303364C CN 1303364 C CN1303364 C CN 1303364C CN B2004100401376 A CNB2004100401376 A CN B2004100401376A CN 200410040137 A CN200410040137 A CN 200410040137A CN 1303364 C CN1303364 C CN 1303364C
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Abstract
The present invention relates to a microwave electrodeless discharge ultraviolet sterilizing microwave oven, particularly to a a microwave oven which utilizing microwaves to excit and generate ultraviolet rays for sterilization in the microwave oven. Aiming at the defects that the existing microwave oven has no ultraviolet sterilizing function or has complicated structure, low efficiency, short service life, etc. at the same time of having an ultraviolet sterilizing function. A microwave electrodeless discharge ultraviolet lamp tube which can radiate ultraviolet rays when excited by microwaves is arranged in the microwave oven of electrodeless discharge, and a power attenuator is also arranged to control the magnitude of power during the operation of the microwave oven; in this way, the microwave oven can normally heat articles during high power and can also use microwaves to excite the electrodeless discharge ultraviolet lamp tube containing mercury and inert gas to radiate ultraviolet rays during low power for sterilizing the articles. The present invention realizes double sterilization processing from ultraviolet rays and microwaves for a variety of articles in the microwave oven in the mode of having the advantages of convenience, simplicity, high efficiency, high durability, low cost, strong practicability and wide application range, which widens the application area of microwave ovens.
Description
Technical field
The present invention relates to a kind of disinfection by ultraviolet light micro-wave oven, especially relate to a kind of microwave-excitation that in micro-wave oven, utilizes and produce the micro-wave oven that ultraviolet ray carries out disinfection, in International Classification of Patents, belong to A47J class or F24C class.
Technical background
Household microwave oven is mainly used in food cooking, simultaneously also have certain disinfection function, but its disinfection function has following deficiency: 1. stronger fuel factor is arranged during microwave sterilization, can produce higher temperature, be not suitable for the sterilization of temperature-sensitive article; 2. microwave action is when article, will utilize in the article contained humidity rising temperature and moisture is volatilized in a large number, therefore is not suitable for the sterilization of the low article of water content; 3. during microwave action, the electromagnetic field intensity in the micro-wave oven furnace chamber is very high, and metal can produce sparking, electric discharge phenomena, so is not suitable for the sterilization of metal; What 4. microwave sterilization was sterilized is limited in scope, and it is effective that too late disinfection by ultraviolet light is sterilized.
(190nm～290nm) have disinfecting and sterilizing functions belongs to broad-spectrum disinfectant sterilization quasi-optical wave to ultraviolet UVC wave band.Studies have shown that, the ultraviolet ray of UVC wave band can be comprised that numerous bacteriums of bacterial propagule, mycobacterium, coronavirus, fungi, Richettsia and Chlamydia etc., the DNA of virus absorb well, thereby destroy the DNA of bacterium, virus, bacterium, virus are killed, reached the purpose of sterilization.Its main feature is that the sterilization scope is wide, effective, does not have fuel factor during sterilization, is specially adapted to the sterilization of temperature-sensitive article.
Visible on the market now disinfection by ultraviolet light micro-wave oven is that quartz burner is installed outside micro-wave oven, and ultraviolet ray enters micro-wave oven by mesh sterilisation of objects is sterilized.This mode has several major defects: 1. quartz burner adopts the electric ballast power supply mode, can not bear the high temperature of micro-wave oven for a long time, and filament is easily aging, and the life-span is short; 2. ultraviolet ray enters micro-wave oven by mesh, generally will lose the ultraviolet power more than 30%, and efficient is low; If 3. device breakage or improper use, the outer ultraviolet ray of stove causes damage to human body easily; 4. structure is lengthy and jumbled, is unfavorable for marketing.
Retrieval is found, application number is that the application for a patent for invention of 02153115.3 " micro-wave oven of built-in ultraviolet sterilization apparatus " by name and application number are the utility model patent of 02225094.8 " micro-wave oven with sterilizing function " by name, all sterilization has in various degree elaboration to the built-in disinfection by ultraviolet light of micro-wave oven, its weak point is: 1. quartz burner remains the mode that adopts the electric ballast power supply, can not bear the high temperature of micro-wave oven for a long time, because in stove, its filament is easier to be aging, and the life-span is shorter; 2. its disinfector need connect other electric wire, and with other power supply, it is lengthy and jumbled that structure still shows; And if power supply that need not be other is directly starting the sterilization that carries out disinfection when micro-wave oven carries out heating using microwave, because temperature surpasses 60 ℃, the function of its disinfection by ultraviolet light sterilization will be had a greatly reduced quality; 4. the surface of its quartz burner is not easy to clean, and when surface of the light tube had dust or surface of the light tube contaminated, ultraviolet radiation can reduce, and influences bactericidal effect.
In view of the defective or the deficiency of prior art, present patent application has proposed the design of new disinfection by ultraviolet light micro-wave oven on a large amount of experimental basis.
Summary of the invention
The present invention is primarily aimed at the deficiencies in the prior art, with easy, efficient, durable, cost is low, mode practical, wide application provides a kind of micro-wave oven that is applicable to the disinfection by ultraviolet light sterilization of the multiple article that comprise thermal sensitivity article, article that water content is low, metal.
For achieving the above object, first kind of technical scheme of the present invention is:
On general domestic microwave furnace foundation, increase microwave electrodeless discharge quartz burner, fluorescent tube shielding sheet, shielding sheet control device, power attenuator, ultraviolet radiation absorption film with conventional components such as electric control chamber, furnace chamber, fire door, external box of microvave, high-tension transformer, magnetron, high voltage sourcies.
The microwave electrodeless discharge quartz burner is placed on the micro-wave oven furnace chamber inwall, and the quartz burner outside covers or is surrounded by the shielding sheet, and this shielding sheet links to each other with shielding sheet control device.Because the hard to bear microwave-excitation of microwave electrodeless discharge quartz burner energy produces ultraviolet ray, thereby implements sterilization,, accept microwave-excitation when needs carry out disinfection so the effect of shielding sheet just is to allow this quartz burner come out; And when not needing to carry out disinfection, hide this quartz burner, avoid it to accept microwave-excitation.
The power attenuator that is positioned at electric control chamber is made up of high-voltage relay and high-voltage capacitor two parts, and the on-off switch of high-voltage relay is in parallel with high-voltage capacitor.The high-voltage relay of described power attenuator links to each other with the high voltage source of micro-wave oven.High-voltage capacitor one end of described power attenuator links to each other with winding of high-tension transformer of micro-wave oven, and the other end links to each other with magnetron by the high-voltage capacitance of micro-wave oven.Because the power of micro-wave oven when culinary art is bigger, to produce high temperature, and after temperature is higher than 60 ℃, the ultraviolet ray decay of UVC wave band is serious, ultraviolet sterilizing function works hardly, so the present invention is provided with power attenuator, is used to regulate watt level, when disinfection by ultraviolet light, power is turned down, when culinary art, power is heightened; Simultaneously, under the lower powered disinfection, metal can not produce sparking, electric discharge phenomena.
The ultraviolet radiation absorption film is attached on the door of microwave oven.Though ultraviolet penetration capacity is very weak, use for greater safety, more relievedly, still on door of microwave oven, stick on the ultraviolet radiation absorption film, make the ultraviolet ray that produces in the sterilization process be difficult to more overflow, avoid human body is caused damage.
When micro-wave oven heated, shielding sheet control device control shielding sheet was to closed condition, and the shielding of microwave electrodeless discharge quartz burner conductively-closed sheet is not subjected to microwave-excitation; The high-voltage relay of power attenuator is in on-state, and the magnetron power output is in high level state, and high-tension circuit is normal domestic use micro-wave oven power supply mode, guarantees that power output can satisfy the requirement of food cooking.
When micro-wave oven carried out disinfection by ultraviolet light, shielding sheet control device control shielding sheet was to open mode, and the microwave electrodeless discharge quartz burner directly is exposed in the micro-wave oven furnace chamber, is in the microwave-excitation state of accepting; By a switch high-voltage relay of power attenuator is disconnected, this moment, the high-voltage capacitor of power attenuator was connected in the high-tension circuit, total capacitance in the high-tension circuit is reduced, thereby the magnetron average current is descended, the magnetron power output is in low level state, this both can guarantee that the microwave electrodeless discharge quartz burner was subjected to microwave-excitation, the ultraviolet ray of radiation sufficient intensity, in order to sterilization, simultaneously can not cause that again temperature significantly rises, can not cause the metal discharge sparking that is sterilized, cause damage.In the disinfection by ultraviolet light sterilization, still there is the microwave of certain power density in the micro-wave oven furnace chamber, still have the sterilization effect.
The enclosure material of set microwave electrodeless discharge quartz burner is based on high-purity quartz in the micro-wave oven, and mixes and add a little titanium, makes the ultraviolet of 254nm can appear fluorescent tube and stop 185nm and the ultraviolet ray effusion fluorescent tube of 320～400nm.Be filled with inert gas and liquid mercury or solid-state mercury in the described microwave electrodeless discharge quartz burner, the content of inert gas and mercury is determined according to the sterilization intensity of fluorescent tube size and actual needs, if the content of inert gas is excessive, can be after making the vaporization of solid-state mercury or liquid mercury, make temperature continue to rise, be unfavorable for disinfection by ultraviolet light, if too small, the temperature of rising with deficiency so that mercury vaporize rapidly; In the microwave electrodeless discharge quartz burner of a certain definite size, if the content of mercury is excessive, can in vaporescence, produce high temperature, and lamp tube wall is formed high pressure, be unfavorable for disinfection by ultraviolet light; If the content of mercury reduces, the time that reaches same Disinfection Effect will prolong.This microwave electrodeless discharge quartz burner does not have electrode, does not have filament, does not have electric ballast, does not have external any power source.During sterilization, the noble gas discharge in the microwave-excitation fluorescent tube causes temperature rising in the fluorescent tube, makes liquid mercury or solid-state mercury vaporization in the fluorescent tube; In the vaporescence of mercury, mercury produces discharge, and radiates multispectral ultraviolet ray, and quartz burner is emitted the ultraviolet ray of 254nm wavelength, to the sterilization that carries out disinfection of article in the stove; The quartz burner that is mixed with titanium simultaneously will stop 185nm ultraviolet ray effusion to make air ionization and produce unwanted ozone, stop 320～400nm ultraviolet ray to be overflowed and make skin produce erythema etc.Certainly, the same with the micro-wave oven heating cooking, in disinfecting process, door of microwave oven should be closed infringement human body in order to avoid ultraviolet ray is overflowed.
Actual conditions according to micro-wave oven, set microwave electrodeless discharge quartz burner can have one or many in the micro-wave oven, accordingly, when micro-wave oven heats, play a part the shielding ultraviolet rays fluorescent tube, make it also can not had one or more by the shielding sheet of microwave-excitation.The profile of described microwave electrodeless discharge quartz burner is not limit, and can be linear pattern, can be ring-like, can be " H " type, can be ball-type; The material of described shielding sheet is not limit, and can be plastics, can be metal, can be pottery; The shape and the size of shielding sheet are regardless of, as long as can just can by shield microwaves electrodless discharge quartz burner.
When micro-wave oven carried out disinfection by ultraviolet light, making the switch of the high-voltage relay disconnection of power attenuator can be contact switch, can be optoelectronic switch, can be magnetic induction switch.Generally speaking, when micro-wave oven was in the disinfection by ultraviolet light state, the power output of power attenuator control magnetron was in 100W.
It is 254nm that the ultraviolet radiation absorption film that pastes on the door of microwave oven as previously mentioned absorbs ultraviolet wavelength.
The position of microwave electrodeless discharge quartz burner in furnace chamber in the micro-wave oven do not limit as previously mentioned, generally can be arranged near the central authorities of end face of micro-wave oven furnace chamber inwall, but according to the practical structures situation of different micro-wave ovens (such as the micro-wave oven of band baking function, if the microwave electrodeless discharge quartz burner is placed on the end face of micro-wave oven furnace chamber inwall, just not too suitable), also can be arranged at the intersection at side or the back side or the side and the back side of furnace chamber inwall.
Second kind of technical scheme of the present invention is:
On general domestic microwave furnace foundation, increase microwave electrodeless discharge quartz burner, plate, power attenuator, ultraviolet radiation absorption film with conventional components such as electric control chamber, furnace chamber, fire door, external box of microvave, high-tension transformer, magnetron, high voltage sourcies.
The microwave electrodeless discharge quartz burner is installed on the plate, when the needs sterilization plate is inserted in the micro-wave oven furnace chamber, and do not need to use plate when heating cooking.
Identical with first kind of technical scheme, the power attenuator that is positioned at electric control chamber is made up of high-voltage relay and high-voltage capacitor two parts, and the on-off switch of high-voltage relay is in parallel with high-voltage capacitor.The high-voltage relay of described power attenuator links to each other with the high voltage source of micro-wave oven; High-voltage capacitor one end of described power attenuator links to each other with winding of high-tension transformer of micro-wave oven, and the other end links to each other with magnetron by the high-voltage capacitance of micro-wave oven.The ultraviolet radiation absorption film is attached on the door of microwave oven.
When micro-wave oven heats, in furnace chamber, do not insert the plate that has the microwave electrodeless discharge quartz burner, the high-voltage relay of power attenuator is in on-state, and the magnetron power output is in high level state.
When micro-wave oven carries out disinfection by ultraviolet light, in furnace chamber, insert the plate that has the microwave electrodeless discharge quartz burner, the microwave electrodeless discharge quartz burner directly is exposed in the micro-wave oven furnace chamber, be in the microwave-excitation state of accepting, after plate inserts and puts in place, by a switch high-voltage relay of power attenuator is disconnected, the magnetron power output is in low level state.When finishing sterilization, take out plate, switch resets, and the high-voltage relay of power attenuator is connected.
Identical with first kind of technical scheme, the enclosure material that is installed in the microwave electrodeless discharge quartz burner on the plate is based on high-purity quartz, and add a little titanium, make the ultraviolet of 254nm can appear fluorescent tube and stop 185nm and the ultraviolet ray effusion fluorescent tube of 320～400nm.Be filled with inert gas and liquid mercury or solid-state mercury in the described microwave electrodeless discharge quartz burner, the content of inert gas and mercury is determined according to the sterilization intensity of fluorescent tube size and actual needs; Described microwave electrodeless discharge quartz burner does not have electrode, does not have filament, does not have electric ballast, does not have external any power source; On this fluorescent tube without any covering.
Foregoing microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven, set microwave electrodeless discharge quartz burner can have one or many on its plate; The profile of described microwave electrodeless discharge quartz burner is not limit, and can be linear pattern, can be ring-like, can be " H " type, can be ball-type.The material of described plate is not limit, and can be plastics, can be pottery, can be metal; The shape and the size of plate are regardless of, as long as can put in the micro-wave oven furnace chamber just passable.
Foregoing microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven, making the switch of the high-voltage relay disconnection of power attenuator after plate inserts can be contact switch, can be optoelectronic switch, can be magnetic induction switch; Generally speaking, when micro-wave oven was in the disinfection by ultraviolet light state, the power output of power attenuator control magnetron was in 100W.
It is 254nm that the ultraviolet radiation absorption film that pastes on the door of microwave oven as previously mentioned absorbs ultraviolet wavelength.The same with the micro-wave oven heating cooking, in disinfecting process, door of microwave oven should be closed infringement human body in order to avoid ultraviolet ray is overflowed.
In foregoing micro-wave oven, the position of plate in furnace chamber that has the microwave electrodeless discharge quartz burner do not limit, and can be arranged at the end face of furnace chamber inwall, can be arranged at the side or the back side of furnace chamber inwall yet; The fixed form of plate in furnace chamber do not limit, and can be slot, can be that clamp is fixed, and can be support, can directly put into furnace chamber yet, do not fix.
By above two kinds of technical schemes, the present invention can reach purpose of design.Compared with the prior art, advantage of the present invention and beneficial effect mainly are:
Realized the multiple article that comprise temperature-sensitive article, article that water content is low, metal carry out ultraviolet ray and microwave in micro-wave oven dual sterilization handled that (the disinfection by ultraviolet light sterilization is in extensive range, and do not have temperature rise, pollution-free, sterilization is fast, microwave sterilization has the advantage that high-penetrability, sterilization do not have the dead angle, both combinations, have complementary advantages, accelerated sterilization speed, reduced the requirement of selecting to be sterilized the sterilizing article type); It is very low that ultraviolet ray is done the loss of time spent at the performance sterilization, the utilization ratio height; Play the microwave electrodeless discharge quartz burner of disinfective action, need not electrode, need not filament, need not ballast, need not independent power supply, fluorescent tube is easy to clean, almost can reuse under the situation that does not have outside artificial damage unlimitedly, and service life is extremely long; Can regulate and control the watt level of micro-wave oven, can arbitrarily cook and sterilize; Simple in structure, easy to use, widened the application of micro-wave oven.
The applicant carried out test of many times in the university in Chengdu and the hospital in Guangzhou, and result of the test shows that the invention sterilization effect is good, and safe in utilization, convenient for production, was easy to promote.
Description of drawings
Fig. 1 is the schematic diagram of first kind of technical scheme principle of the present invention.
Fig. 2 is the power attenuator wiring diagram.
Fig. 3 is the power attenuator circuit diagram.
Fig. 4 is the cutaway view of linear pattern microwave electrodeless discharge quartz burner.
Fig. 5 is the plate schematic diagram that a linear pattern quartz burner is housed.
Fig. 6 is the micro-wave oven perspective view of first embodiment when shielding sheet and opening.
Fig. 7 is the micro-wave oven perspective view of second embodiment when inserting the plate that quartz burner is housed.
Number in the figure is as follows:
1 high voltage source, 2 power attenuators
3 magnetrons, 4 micro-wave oven furnace chambers
5 microwave electrodeless discharge quartz burners, 6 shielding sheets
7 shielding sheet control device, 8 high-tension transformers
High-voltage capacitance 10 plates of 9 micro-wave ovens
The high-voltage capacitor of high-voltage relay 12 power attenuators of 11 power attenuators
13 fluorescent tube shells, 14 fluorescent tube inner chambers
15 electric control chambers, 16 enclosed slots
17 liquid mercuries, 18 supports
The specific embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are further described.
Embodiment one
Drive the enclosed slot 16 of a long 200mm, wide 70mm, dark 40mm in the end face central authorities of furnace chamber 4 inwalls of 850W micro-wave oven, a diameter 15mm, long 160mm, electrodeless, no filament are installed therein, do not connect power supply, can emit the ultraviolet of 254nm and are stoped 185nm and linear microwave electrodeless discharge quartz burner 5 that the ultraviolet ray of 320～400nm is overflowed, the material of fluorescent tube 5 shells 13 is that high-purity quartz adds a little titanium, fluorescent tube 5 inner chambers 14 are filled an amount of neon and solid-state mercury, and the quality of mercury is 500mg.The stainless steel shielding sheet 6 of being close to enclosed slot 16 of one block length 205mm, wide 75mm, thick 0.5mm is set below enclosed slot 16, and shielding sheet 6 can cover enclosed slot 16 fully.The slit that the termination of shielding sheet 6 has support bar to pass through enclosed slot 16 ends is connected with shielding sheet control device 7.When micro-wave oven does not use or in order to when heating, shielding sheet 6 is in closed condition, covers enclosed slot 16, covers the microwave electrodeless discharge quartz burner 5 in the enclosed slot 16.Post on the door of microwave oven and absorb the ultraviolet ultraviolet radiation absorption film of 254nm wavelength.
When micro-wave oven heated, it was closed condition that shielding sheet control device 7 control shielding sheets 6 keep original state, and microwave electrodeless discharge quartz burner 5 conductively-closed sheets 6 hide; High-voltage relay 11 in the power attenuator 2 is connected, after starting micro-wave oven, high-tension circuit directly gives magnetron 3 power supplies with normal domestic use micro-wave oven power supply mode, magnetron 3 power outputs are in high level state, magnetron 3 produces microwave feed-in micro-wave oven furnace chamber 4, and function is identical with common microwave stove.At this moment, magnetron 3 average operating current 290mA, microwave power 850W, microwave operational frequencies 2450 ± 15MHz.
When micro-wave oven carried out disinfection by ultraviolet light, shielding sheet control device 7 was opened shielding sheet 6, and microwave electrodeless discharge quartz burner 5 directly is exposed in the micro-wave oven furnace chamber 4, is in the microwave-excitation state of accepting; By a contact switch high-voltage relay 11 of power attenuator 2 is disconnected, shut door of microwave oven this moment, start micro-wave oven, be connected on high-voltage capacitor 12 work of the power attenuator 2 in the high-tension circuit, total capacitance in the high-tension circuit is reduced, thereby magnetron 3 average currents are descended, the average microwave power that is input in the micro-wave oven furnace chamber 4 is reduced.Microwave in the furnace chamber 4 is not enough to heat article at this moment, but is enough to excite microwave electrodeless discharge quartz burner 5 to produce ultraviolet ray, uses for sterilization.At this moment, magnetron 3 average operating current 80mA, microwave power 65W, microwave operational frequencies 2450 ± 15MHz, the uitraviolet intensity of (apart from microwave electrodeless discharge quartz burner 5 about 200mm) is 400 μ W/cm on the microwave oven turntable surface
2
The test effect of present embodiment sterilization (the about 200mm of distance of slide and microwave electrodeless discharge ultraviolet lamp) as shown in the table:
| Microorganism fungus kind | Action time (minute) | Viable count (cfu/ml) on the contrast slide | Viable count (cfu/ml) on the slide of effect back | Sterilizing rate (%) |
| Candida albicans ATCC 10231 | 1 | 2.8×10 4 | 500 | 98.21 |
| 2 | ＜10 | ＞99.99 | ||
| 5 | ＜10 | ＞99.99 | ||
| Bacillus subtilis black mutation ATCC 9372 | 1 | 4×10 4 | 150 | 99.63 |
| 2 | ＜10 | ＞99.99 | ||
| 5 | ＜10 | ＞99.99 | ||
| Salmonella typhimurium NICPBP 50115 | 1 | 1.6×10 5 | 165 | ＞99.99 |
| 2 | 155 | ＞99.99 | ||
| 5 | 115 | ＞99.99 | ||
| Friedlander ATCC 10031 | 1 | 3.0×10 5 | ＜10 | ＞99.99 |
| 2 | ＜10 | ＞99.99 | ||
| 5 | ＜10 | ＞99.99 |
Annotate: test is carried out with reference to standard GB 15979-2002 (appendix C: product antibacterial and bactericidal property and stability test method) and Ministry of Health of the People's Republic of China 2002 " disinfection technology standard P62, P15 ".
Embodiment two
On the top of furnace chamber 4 left and right sides madial walls of 1000W micro-wave oven, reserve pair of parallel, contour, symmetrical support 18, in the terminal of support 18 touch switch is installed, touch switch is connected with power attenuator 2.
The linear pattern microwave electrodeless discharge quartz burner 5 of two diameter 15mm, long 160mm is installed on the plate 10.On this fluorescent tube 5 without any covering.These fluorescent tube 5 electrodeless, no filaments, do not connect power supply, can emit the ultraviolet of 254nm and stop 185nm and the ultraviolet ray of 320～400nm is overflowed.The material of fluorescent tube 5 shells 13 is that high-purity quartz adds a little titanium, and fluorescent tube 5 inner chambers 14 are filled an amount of helium and liquid mercury 17, and the quality of mercury is 800mg.The material of plate 10 is plastics, and the spacing distance that its width and furnace chamber 4 interior pair of brackets are 18 adapts, and its thickness is less than the spacing distance of support 18 with furnace chamber 4 end faces.On the fire door of micro-wave oven, post and absorb the ultraviolet ultraviolet radiation absorption film of 254nm wavelength.
When micro-wave oven carries out the disinfection by ultraviolet light sterilization, to the plate 10 of microwave electrodeless discharge quartz burner 5 be installed, place on the support 18, push in the furnace chamber 4 (having one of fluorescent tube 5 to face down), until the end, make plate 10 preceding end in contact and open the touch switch of support 18 terminals, the high-voltage relay 11 of power attenuator 2 is disconnected.Shut door of microwave oven this moment, start micro-wave oven, be connected on high-voltage capacitor 12 work of the power attenuator 2 in the high-tension circuit, the total capacitance in the high-tension circuit is reduced, make magnetron 3 power outputs be in low level state, the average microwave power that is input in the micro-wave oven furnace chamber 4 is reduced.Microwave in the furnace chamber 4 is not enough to heat article at this moment, but is enough to excite microwave electrodeless discharge quartz burner 5 to produce ultraviolet ray, uses for sterilization.At this moment, magnetron 3 average operating current 90mA, microwave power 70W, microwave operational frequencies 2455 ± 15MHz, the uitraviolet intensity of (apart from microwave electrodeless discharge quartz burner 5 about 180mm) is 420 μ W/cm on the microwave oven turntable surface
2
When finishing sterilization, close microwave oven supply power, open door for microwave oven, take out plate 10, the switch of support 18 terminals resets, and the high-voltage relay 11 of power attenuator 2 is connected.At this moment, micro-wave oven recovers common heating function, can cook normally.
The test effect of present embodiment sterilization is close with embodiment one, repeats no more.
Claims (9)
1. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven, contain the parts that electric control chamber (15), furnace chamber (4), fire door, external box of microvave, high-tension transformer (8), magnetron (3), high voltage source micro-wave ovens such as (1) possess usually, it is characterized in that: it also contains microwave electrodeless discharge quartz burner (5), shielding sheet (6), shielding sheet control device (7), power attenuator (2), ultraviolet radiation absorption film;
Microwave electrodeless discharge quartz burner (5) is placed on micro-wave oven furnace chamber (4) inwall, and this fluorescent tube (5) outside covers or be surrounded by shielding sheet (6), and this shielding sheet (6) links to each other with shielding sheet control device (7); The power attenuator (2) that is positioned at electric control chamber (15) is made up of high-voltage relay (11) and high-voltage capacitor (12) two parts, the on-off switch of high-voltage relay (11) is in parallel with high-voltage capacitor (12), high-voltage capacitor (12) one ends of described power attenuator (2) link to each other with (8) windings of high-tension transformer of micro-wave oven, the other end links to each other with magnetron (3) by the high-voltage capacitance (9) of micro-wave oven, and the high-voltage relay (11) of described power attenuator (2) links to each other with high voltage source (1); The ultraviolet radiation absorption film is attached on the door of microwave oven;
When micro-wave oven heats, shielding sheet control device (7) control shielding sheet (6) is to closed condition, microwave electrodeless discharge quartz burner (5) conductively-closed sheet (6) shielding, be not subjected to microwave-excitation, the high-voltage relay (11) of power attenuator (2) is in on-state, and magnetron (3) power output is in high level state;
When micro-wave oven carries out disinfection by ultraviolet light, shielding sheet control device (7) control shielding sheet (6) is to open mode, microwave electrodeless discharge quartz burner (5) directly is exposed in the micro-wave oven furnace chamber (4), be in the microwave-excitation state of accepting, by a switch high-voltage relay (11) of power attenuator (2) is disconnected, make magnetron (3) power output be in low level state.
2. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 1, it is characterized in that: set microwave electrodeless discharge quartz burner (5) can have one or many in the micro-wave oven, accordingly, when micro-wave oven heats, play a part shielding ultraviolet rays fluorescent tube (5), make it also can not had one or more by the shielding sheet (6) of microwave-excitation; The profile of described microwave electrodeless discharge quartz burner (5) can be a linear pattern, can be ring-like, can be " H " type, can be ball-type; The material of described shielding sheet (6) can be a metal, can be plastics, can be pottery, and the shape and the size of shielding sheet (6) are regardless of, as long as can just can by shield microwaves electrodless discharge quartz burner (5).
3. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 1 or 2, it is characterized in that: shell (13) material of set microwave electrodeless discharge quartz burner (5) is based on high-purity quartz in the micro-wave oven, and add a little titanium, make the ultraviolet of 254nm can appear fluorescent tube (5) and stop 185nm and the ultraviolet ray effusion fluorescent tube (5) of 320～400nm; Be filled with inert gas and liquid mercury or solid-state mercury in the described microwave electrodeless discharge quartz burner (5), the content of inert gas and mercury is determined according to the sterilization intensity of fluorescent tube (5) size and actual needs; Described microwave electrodeless discharge quartz burner (5) does not have external any power source.
4. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 1 is characterized in that: making the switch of high-voltage relay (11) disconnection of power attenuator (2) can be contact switch, can be optoelectronic switch, can be magnetic induction switch; When micro-wave oven was in the disinfection by ultraviolet light state, the power output of power attenuator (2) control magnetron (3) was in 100W.
5. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 1 is characterized in that: it is 254nm that the ultraviolet radiation absorption film that fire door pasted absorbs ultraviolet wavelength; Microwave electrodeless discharge quartz burner (5) can be arranged near the central authorities of end face of furnace chamber (4) inwall, also can be arranged at the intersection at side or the back side or the side and the back side of furnace chamber (4) inwall.
6. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven, contain the parts that electric control chamber (15), furnace chamber (4), fire door, external box of microvave, high-tension transformer (8), magnetron (3), high voltage source micro-wave ovens such as (1) possess usually, it is characterized in that: it also contains microwave electrodeless discharge quartz burner (5), plate (10), power attenuator (2), ultraviolet radiation absorption film;
Microwave electrodeless discharge quartz burner (5) is installed on the plate (10), when the needs sterilization plate (10) is inserted in the micro-wave oven furnace chamber (4); The power attenuator (2) that is positioned at electric control chamber (15) is made up of high-voltage relay (11) and high-voltage capacitor (12) two parts, the on-off switch of high-voltage relay (11) is in parallel with high-voltage capacitor (12), high-voltage capacitor (12) one ends of described power attenuator (2) link to each other with (8) windings of high-tension transformer of micro-wave oven, the other end links to each other with magnetron (3) by the high-voltage capacitance (9) of micro-wave oven, and the high-voltage relay (11) of described power attenuator (2) links to each other with high voltage source (1); The ultraviolet radiation absorption film is attached on the door of microwave oven;
When micro-wave oven heats, in furnace chamber (4), do not insert the plate (10) that has microwave electrodeless discharge quartz burner (5), the high-voltage relay (11) of power attenuator (2) is in on-state, and magnetron (3) power output is in high level state;
When micro-wave oven carries out disinfection by ultraviolet light, in furnace chamber (4), insert the plate (10) that has microwave electrodeless discharge quartz burner (5), microwave electrodeless discharge quartz burner (5) directly is exposed in the micro-wave oven furnace chamber (4), be in the microwave-excitation state of accepting, after plate (10) inserts and puts in place, by a switch high-voltage relay (11) of power attenuator (2) is disconnected, magnetron (3) power output is in low level state.
7. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 6 is characterized in that: plate (10) is gone up set microwave electrodeless discharge quartz burner (5) can one or many; The profile of described microwave electrodeless discharge quartz burner (5) can be a linear pattern, can be ring-like, can be " H " type, can be ball-type; The material of described plate (10) can be plastics, can be pottery, can be metal, and the shape and the size of plate (10) are regardless of, as long as can put in the micro-wave oven furnace chamber (4) just passable.8. as claim 6 or 7 described microwave electrodeless discharge disinfection by ultraviolet light micro-wave ovens, it is characterized in that: shell (13) material that is installed in the microwave electrodeless discharge quartz burner (5) on the plate (10) is based on high-purity quartz, and add a little titanium, make the ultraviolet of 254nm can appear fluorescent tube (5) and stop 185nm and the ultraviolet ray effusion fluorescent tube (5) of 320～400nm; Be filled with inert gas and liquid mercury or solid-state mercury in the described microwave electrodeless discharge quartz burner (5), the content of inert gas and mercury is determined according to the sterilization intensity of fluorescent tube (5) size and actual needs; Described microwave electrodeless discharge quartz burner (5) does not have external any power source; Described microwave electrodeless discharge quartz burner (5) is gone up without any covering.
9. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 6, it is characterized in that: making the switch of high-voltage relay (11) disconnection of power attenuator (2) after plate (10) inserts can be contact switch, can be optoelectronic switch, can be magnetic induction switch; When micro-wave oven was in the disinfection by ultraviolet light state, the power output of power attenuator (2) control magnetron (3) was in 100W.
10. microwave electrodeless discharge disinfection by ultraviolet light micro-wave oven as claimed in claim 6 is characterized in that: it is 254nm that the ultraviolet radiation absorption film that fire door pasted absorbs ultraviolet wavelength; The plate (10) that has microwave electrodeless discharge quartz burner (5) can be arranged at the end face of furnace chamber (4) inwall, also can be arranged at the side or the back side of furnace chamber (4) inwall; The fixed form of plate (10) in furnace chamber (4) can be slot, can be that clamp is fixed, and can be support (18), also can directly put into furnace chamber (4), do not fix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401376A CN1303364C (en) | 2004-07-06 | 2004-07-06 | Microwave electrodeless discharging ultra violet ray disinfectant microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100401376A CN1303364C (en) | 2004-07-06 | 2004-07-06 | Microwave electrodeless discharging ultra violet ray disinfectant microwave oven |
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| Publication Number | Publication Date |
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| CN1719108A CN1719108A (en) | 2006-01-11 |
| CN1303364C true CN1303364C (en) | 2007-03-07 |
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| CNB2004100401376A Expired - Fee Related CN1303364C (en) | 2004-07-06 | 2004-07-06 | Microwave electrodeless discharging ultra violet ray disinfectant microwave oven |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2447909B (en) * | 2007-03-27 | 2012-02-15 | Univ Bolton | Life extension of stored food stuff |
| CN102058042A (en) * | 2009-11-16 | 2011-05-18 | 美的集团有限公司 | Device for sterilizing by using ultraviolet rays and microwaves in cooperation |
| CN107007853A (en) * | 2017-05-02 | 2017-08-04 | 朱升和 | A kind of ultraviolet germicidal lamp using double amalgam microwave-drivens |
| CN108478824A (en) * | 2018-05-23 | 2018-09-04 | 广东美的厨房电器制造有限公司 | Sterilizing equipment decontaminating apparatus |
| CN113266855A (en) * | 2021-05-31 | 2021-08-17 | 广东美的厨房电器制造有限公司 | Microwave cooking apparatus |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2524130Y (en) * | 2002-01-07 | 2002-12-04 | 广东康宝电器有限公司 | Microwave oven with sterilization function |
| KR20020092658A (en) * | 2001-06-05 | 2002-12-12 | 대우전자주식회사 | Apparatus for sterilizing microwave oven and method therefor |
| CN1502861A (en) * | 2002-11-26 | 2004-06-09 | 乐金电子(天津)电器有限公司 | Microwave oven with built-in ultraviolet ray steriliznig device |
| CN2714999Y (en) * | 2004-07-06 | 2005-08-03 | 成都骏元科技发展有限责任公司 | Microwave electrodeless discharge ultraviolet sterilizing microwave oven |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020092658A (en) * | 2001-06-05 | 2002-12-12 | 대우전자주식회사 | Apparatus for sterilizing microwave oven and method therefor |
| CN2524130Y (en) * | 2002-01-07 | 2002-12-04 | 广东康宝电器有限公司 | Microwave oven with sterilization function |
| CN1502861A (en) * | 2002-11-26 | 2004-06-09 | 乐金电子(天津)电器有限公司 | Microwave oven with built-in ultraviolet ray steriliznig device |
| CN2714999Y (en) * | 2004-07-06 | 2005-08-03 | 成都骏元科技发展有限责任公司 | Microwave electrodeless discharge ultraviolet sterilizing microwave oven |
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| CN1719108A (en) | 2006-01-11 |
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