CN103127967A - Photocatalyst sterilization biosafety cabinet - Google Patents
Photocatalyst sterilization biosafety cabinet Download PDFInfo
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- CN103127967A CN103127967A CN201310086551XA CN201310086551A CN103127967A CN 103127967 A CN103127967 A CN 103127967A CN 201310086551X A CN201310086551X A CN 201310086551XA CN 201310086551 A CN201310086551 A CN 201310086551A CN 103127967 A CN103127967 A CN 103127967A
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- clean room
- safety equipment
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Abstract
The invention relates to a photocatalyst sterilization biosafety cabinet, and belongs to the technical field of experimental equipment. The biosafety cabinet comprises a shell, wherein the shell is internally provided with an operation chamber, a decontamination chamber and an air circulation system; the decontamination chamber is arranged on the operation chamber, and the air circulation system is used for circulating air between the operation chamber and the decontamination chamber; the air circulation system comprises a fan arranged on the air inlet of the decontamination chamber, and the decontamination chamber comprises a contamination particulate matter generating part and a contamination particle matter decomposing part; and the contamination particulate matter generating part and the contamination particle matter decomposing part are successively arranged on an aeration port of the fan. The biosafety cabinet provided by the invention can sterilize and disinfect, and can purify air.
Description
Technical field
The present invention relates to a kind of Photocatalyst sterilization Biohazard Safety Equipment, relate in particular to a kind of Biohazard Safety Equipment that can purify air, belong to the experimental facilities technical field.
Background technology
Fig. 1 is the side schematic view of Biohazard Safety Equipment of the prior art.As shown in Figure 1, described Biohazard Safety Equipment comprises the housing 1 that is arranged on support 30, is provided with castor 31 in the lower end of four legs of support 30.Housing 1 comprises front shrouding 25, front shroud 26, Zuo Bi, You Bi, roof and diapire, be provided with an air dispersion plate 27 at housing 1 middle part, the first half of front shroud 26, left wall, the first half of right wall, roof and air dispersion plate consist of a upper space, the latter half of front shrouding 25, the latter half of left wall, right wall and diapire consist of a lower space, be provided with clean room 2 in upper space, be provided with operating room 3 in lower space, front shrouding 25 can movablely also can be contracted in upper space, is provided with pore on the base plate 29 of the lower end in the operating room.Be connected with operating room back, the left side and the right side of the structure that forms, clean room forms negative pressure channel, lays blower fan 4 on the platform at the air inlet place of clean room.Top in the clean room is provided with exhaust outlet, is arranged with exhaust-air filter 10 at exhaust outlet.Main filter 11 is set between clean room 2 and operating room 3.Be provided with the motor 24 of shrouding 25 before driving in upper space, be arranged with illuminating lamp 28 at front shroud 26.For sterilization, work indoor location UV (ultraviolet ray) lamp 32, namely utilize UV (ultraviolet ray) lamp to shine to kill airborne organic compound or mushroom, but sterilization is not thorough, and simultaneously, the ultraviolet ray irradiation also makes airborne oxygen become ozone, when the concentration over-standard of airborne ozone, ozone is an invisible killer, and its intense stimulus people's respiratory tract causes abscess of throat, cough uncomfortable in chest, causes bronchitis and pulmonary emphysema; Cause people's neurotoxic, dizziness headache, visual impairment, be losing one's memory; Vitamin E in human body skin is played destruction, cause Person's skin wrinkling, blackspot appears; Also can destroy the immunity function of human body, bring out the lymphocyte chromosome pathology, accelerate old and feeblely, cause the pregnant woman to have a deformed child, so the Biohazard Safety Equipment ozone of discharging can cause the secondary pollution to air, ozone can cause the strong oxidation of some experiment material simultaneously.
Summary of the invention
For overcoming existing shortcoming in prior art, goal of the invention of the present invention is to provide a kind of Photocatalyst sterilization Biohazard Safety Equipment, and described Biohazard Safety Equipment can be sterilized, be sterilized, and can not cause secondary pollution to air.
for realizing described goal of the invention, the invention provides a kind of Biohazard Safety Equipment, described safety cabinet comprises housing, be provided with the operating room in housing, clean room and air circulation system, wherein the clean room is arranged on the operating room, air circulation system is used for circulated air between operating room and clean room, air circulation system comprises the blower fan that is arranged on air inlet place, clean room, it is characterized in that, the clean room comprises contaminant particle material production part and contaminant particle substance decomposition parts, described contaminant particle material production part and contaminant particle substance decomposition parts are successively set on the blowing mouth place of blower fan.
Preferably, the described thing particle matter production part that dyes comprises the first ultraviolet lamp, and airborne organic pollution forms the contaminant particle material through the UV-irradiation that ultraviolet lamp sends.
Preferably, contaminant particle substance decomposition parts comprise the second ultraviolet lamp and are arranged on the photocatalyst layer with a plurality of cellular through holes of ultraviolet lamp both sides, applied titanium dioxide granule on the surface of the cellular through hole of described photocatalyst layer.
Preferably, be provided with exhaust outlet on the top of clean room, be disposed with the first ozone decomposed device and exhaust-air filter under exhaust outlet.
Preferably, set gradually main filter and the second ozone decomposed device between clean room and operating room.
Preferably, described the first ozone decomposed device and the second ozone decomposed utensil have a plurality of cellular through holes, have applied the manganese dioxide particle on the surface of each through hole.
Compared with prior art, Biohazard Safety Equipment provided by the invention can sterilization, sterilization, and odorless, pollution-free.
Figure of description
Fig. 1 is the side schematic view of Biohazard Safety Equipment of the prior art;
Fig. 2 is the front schematic view of Biohazard Safety Equipment provided by the invention;
Fig. 3 is the side schematic view of Biohazard Safety Equipment provided by the invention;
Fig. 4 is the circuit diagram of the control system of Biohazard Safety Equipment provided by the invention.
The specific embodiment
Describe the present invention in detail below in conjunction with accompanying drawing, identical Reference numeral represents identical or similar parts.
Fig. 2 is the schematic diagram of Biohazard Safety Equipment provided by the invention.Fig. 3 is the side schematic view of Biohazard Safety Equipment provided by the invention.as shown in Fig. 2 and 3, described Biohazard Safety Equipment comprises the housing 1 that is arranged on support 30, housing comprises front shrouding 26 (adopting flexible glass door in the present invention), front shroud 25, left wall, right wall, roof and diapire, be provided with an air dispersion plate 27 at housing 1 middle part, front shroud 26, the first half of left wall, the first half of right wall, roof and air dispersion plate consist of a upper space, front shrouding 25, the latter half of left wall, the latter half of right wall and diapire consist of a lower space, be provided with clean room 2 in upper space, be provided with operating room 3 in lower space, front shrouding 25 can movablely also can be contracted in upper space, lower end in the operating room is provided with pore.Clean room and operating room are connected and form negative pressure channel between back, the left side and the right side of the structure that forms and housing, lay blower fan 4 on the platform at the air inlet place of clean room 4, exhaust outlet place at blower fan 4 is provided with sterilization and disinfection device 5, described sterilization and disinfection device 5 comprises contaminant particle material production part and contaminant particle substance decomposition parts, described contaminant particle material production part comprises the first ultraviolet lamp 6, and airborne organic pollution forms the contaminant particle material through the UV-irradiation that ultraviolet lamp 6 sends.Contaminant particle substance decomposition parts comprise the second ultraviolet lamp 7 and are arranged on the photocatalyst layer with a plurality of cellular through holes 8 and 9 of ultraviolet lamp both sides, applied titanium dioxide granule on the surface of the cellular through hole of described photocatalyst layer.9 air outlet place at photocatalyst layer is provided with distinguished and admirable guide plate 14, place corresponding with the air outlet of the tactile reactor 9 of light on the left wall of clean room is provided with distinguished and admirable guide way 15, described distinguished and admirable guide way is that the top is that semicircle is spherical, and the bottom is columniform combination.Top in the clean room is provided with exhaust outlet, is disposed with the first ozone decomposed device 12 and exhaust-air filter 10 under exhaust outlet.Set gradually lower main filter 11 and the second ozone decomposed device 13 between clean room 2 and operating room 3, described ozone decomposed utensil has a plurality of cellular through holes, has applied the manganese dioxide particle on the surface of each through hole.
Still as shown in Figure 2, control system provided by the invention comprises processor 21, display 22, alarm 23 and power supply 20 and differential pressure pickup assembly (wind pressure sensor) 16, differential pressure pickup (wind pressure sensor) 18 and differential pressure pickup (wind pressure sensor) 17.Wherein, two sensors of differential pressure pickup assembly 16 are respectively arranged with the upper and lower of exhaust-air filter 12 and the first ozone wind device, and blast that be used for to survey filter 10 upstreams is poor with extraneous blast, converts leeway to voltage u
1Be input to processor 21; Differential pressure pickup 17 is used for surveying the blast of main filter 13 upstreams and the leeway in downstream, converts leeway to voltage u
2Be input to processor 21.Processor is according to voltage u
1Situation of change judge whether exhaust-air filter 12 lost efficacy, if lost efficacy, processor 21 can send a signal to alarm 23, prompting user exhaust-air filter lost efficacy, the user in time changes exhaust-air filter.Processor 21 is according to voltage u
2Situation of change judge whether main filter lost efficacy, if lost efficacy, processor can send a signal to alarm, prompting householder's filter failure, the user is change owner filter more in time.
Fig. 4 is the circuit diagram of the control system of Biohazard Safety Equipment provided by the invention.As shown in Figure 4, control system provided by the invention also comprises button AN1-AN6, upper limit Hall switch KH1 and lower limit Hall switch KL1, and wherein button AN1-AN6 is arranged on the front shroud of housing.Upper limit Hall switch KH1 is arranged on the upper end of operating room, and lower limit Hall switch KL1 is arranged on the lower end of operating room.Lower end in the glass retractable door is provided with magnet steel, and when door was closed the operating room, magnet steel was aimed at lower limit Hall switch KL1, and KL1 is closed.processor 21 comprises controller, ozone the first threshold values comparator OP1, the first photoelectrical coupler PE1, ozone the second threshold values comparator OP2, the second photoelectrical coupler PE2, ozone the 3rd threshold values comparator OP3, the 3rd photoelectrical coupler PE3, ozone the 4th threshold values comparator OP4, the 4th photoelectric coupling PE4, be used for driving the first driver of the first relay J 1, be used for driving the second driver of the second relay J 2, be used for driving the 3rd driver of the 3rd relay J 3, be used for driving the 3rd driver of the 3rd relay J 3, be used for driving the 4th driver of the 4th relay J 4, be used for driving drive circuit and a plurality of relay of alarm.
Wherein, threshold values comparator OP1 is operational amplifier to OP4.In-phase end input the first threshold voltage of the first threshold values comparator OP1, this voltage is obtained by power supply Ec dividing potential drop by RW1, the output of anti-phase termination the first differential pressure pickup 16, the output of the first threshold values comparator OP1 through the first photoelectrical coupler PE1 in succession in controller.The end of oppisite phase input second valve threshold voltage of the second threshold values comparator OP2, this voltage is obtained by power supply Ec dividing potential drop by RW2, the output of homophase termination the first differential pressure pickup 16, the output of the second threshold values comparator OP2 through the second photoelectrical coupler PE2 in succession in controller.In-phase end input the 3rd threshold voltage of the 3rd threshold values comparator OP3, this voltage is obtained by power supply Ec dividing potential drop by RW3, the output of anti-phase termination the second differential pressure pickup 17, the output of the 3rd threshold values comparator OP1 through the 3rd photoelectrical coupler PE3 in succession in controller.End of oppisite phase input the 4th threshold voltage of the 4th threshold values comparator OP4, this voltage is obtained by power supply Ec dividing potential drop by RW4, the output of positive termination the second differential pressure pickup 17, the output of the 4th threshold values comparator OP4 through the 4th photoelectrical coupler PE4 in succession in controller.
The first driver comprises transistor T R1, resistance R 1 and diode D1, and wherein transistorized base stage TR1 is connected in controller through resistance R 1, grounded emitter, and colelctor electrode connects the positive pole of diode D1.The negative pole of diode D1 connects power supply, and the line bag of the two ends of diode D1 and relay J 1 is in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 1, a terminal of another termination ultraviolet lamp 6, another terminal of ultraviolet lamp 6 connects the second end of the power supply of 220V.When the user needs ultraviolet lamp 6 luminous, when pressing AN1, processor is checked through the signal of pressing AN1, a high potential signal is provided for the base stage of transistor T R1, transistor turns, the line of the relay J 1 that is connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact is closed, and ultraviolet lamp 6 is connected the 220V power supplys and luminous; When the user does not need ultraviolet lamp 6 luminous, in the time of will pressing AN1 again, processor is checked through the signal of pressing AN1, one low-potential signal is provided for the base stage of transistor T R1, the transistor cut-off, the line bag of the relay J 1 that is connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and ultraviolet lamp 6 disconnects with the 220V power supply.
The second driver comprises transistor T R2, resistance R 2 and diode D2, and wherein transistorized base stage TR2 is connected in controller through resistance R 2, grounded emitter, and colelctor electrode connects the positive pole of diode D2.The negative pole of diode D2 connects power supply, and the line bag of the two ends of diode D2 and relay J 2 is in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 2, a terminal of another termination ultraviolet lamp 7, another terminal of ultraviolet lamp 7 connects the second end of the power supply of 220V.When the user needs ultraviolet lamp 7 luminous, when pressing AN2, processor is checked through the signal of pressing AN2, a high potential signal is provided for the base stage of transistor T R2, transistor turns, the line of the relay J 2 that is connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact is closed, and ultraviolet lamp 7 is connected the 220V power supplys and luminous; When the user does not need ultraviolet lamp 7 luminous, in the time of will pressing AN2 again, processor is checked through the signal of pressing AN2, one low-potential signal is provided for the base stage of transistor T R2, the transistor cut-off, the line bag of the relay J 2 that is connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and ultraviolet lamp 7 disconnects with the 220V power supply.
The 3rd driver comprises transistor T R3, resistance R 3 and diode D3, and wherein transistorized base stage TR3 is connected in controller through resistance R 3, grounded emitter, and colelctor electrode connects the positive pole of diode D3.The negative pole of diode D3 connects power supply, and the line bag of the two ends of diode D3 and relay J 3 is in parallel.The first end of the power supply of one termination 220V of the normally opened contact of relay J 3, a terminal of another termination illuminating lamp 28, another terminal of illuminating lamp 28 connects the second end of the power supply of 220V.When the user needs illuminating lamp 28 luminous, when pressing AN3, processor is checked through the signal of pressing AN3, a high potential signal is provided for the base stage of transistor T R3, transistor turns, the line of the relay J 3 that is connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact is closed, and illuminating lamp 28 is connected the 220V power supplys and luminous; When the user does not need illuminating lamp 28 luminous, press again AN3, processor is checked through the signal of pressing AN3, one low-potential signal is provided for the base stage of transistor T R3, the transistor cut-off, the line bag of the relay J 3 that is connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and illuminating lamp 28 disconnects with the 220V power supply.
The 4th driver comprises transistor T R4, resistance R 4 and diode D4, and wherein transistorized base stage TR4 is connected in controller through resistance R 4, grounded emitter, and colelctor electrode connects the positive pole of diode D4.The negative pole of diode D4 connects power supply, and the line bag of the two ends of diode D4 and relay J 4 is in parallel.A give a dinner for a visitor from afar terminal of machine 4 of the first end of the power supply of one termination 220V of the normally opened contact of relay J 4, the other end, another terminal of blower fan 4 connects the second end of the power supply of 220V.When the user needs blower fan 4 work, when pressing AN4, processor is checked through the signal of pressing AN4, a high potential signal is provided for the base stage of transistor T R4, transistor turns, the line of the relay J 4 that is connected with its colelctor electrode is surrounded by electric current to be passed through, and its normally opened contact is closed, and blower fan 4 is connected the 220V power supplys and luminous; When the user does not need blower fan 4 work, in the time of will pressing AN4 again, processor is checked through the signal of pressing AN4, one low-potential signal is provided for the base stage of transistor T R4, the transistor cut-off, the line bag of the relay J 4 that is connected with its colelctor electrode does not have electric current to pass through, and its normally opened contact disconnects, and blower fan 4 disconnects with the 220V power supply.
The drive circuit that is used for the driving alarm comprises transistor T R5 and resistance R 5, and wherein transistorized base stage TR5 is connected in controller through resistance R 5, grounded emitter, and colelctor electrode connects an end of buzzer (alarm), another termination power of buzzer.signal and the first threshold values that the first threshold values comparator OP1 exports the first differential pressure pickup 16 compare, the signal of exporting when differential pressure pickup 16 is during greater than the first threshold values, comparator OP1 exports low-potential signal, light emitting diode conducting in the first photoelectrical coupler PE1 and luminous, photoelectric tube conducting in photoelectrical coupler PE1, first input of processor obtains a low-potential signal, processor obtains after this low-potential signal to alarm and display transmitted signal, make alarm equipment alarm, make display show the printed words that exhaust-air filter 10 lost efficacy, the signal of exporting when differential pressure pickup 16 is during less than the first threshold values, comparator OP1 exports high potential signal, light emitting diode cut-off in the first photoelectrical coupler PE1, photoelectric tube cut-off in photoelectrical coupler PE1, first input of processor obtains a high potential signal, signal and the second threshold values that the second threshold values comparator OP2 exports the first differential pressure pickup 16 compare, the signal of exporting when differential pressure pickup is during less than the second threshold values, comparator OP2 exports low-potential signal, light emitting diode conducting in the second photoelectrical coupler PE2 and luminous, photoelectric tube conducting in photoelectrical coupler PE2, second input of processor obtains a low-potential signal, processor receives after this low-potential signal to alarm and display transmitted signal, make alarm equipment alarm, make display show the printed words of exhaust-air filter 10 breakages, the signal of exporting when the first differential pressure pickup is during greater than the second threshold values, comparator OP2 exports high potential signal, light emitting diode cut-off in the second photoelectrical coupler PE2, photoelectric tube cut-off in photoelectrical coupler PE1, second input of processor obtains a high potential signal.
signal and the 3rd threshold values that the 3rd threshold values comparator OP3 exports the second differential pressure pickup 17 compare, the signal of exporting when differential pressure pickup 17 is during greater than the 3rd threshold values, comparator OP3 exports low-potential signal, light emitting diode conducting in photoelectrical coupler PE3 and luminous, photoelectric tube conducting in photoelectrical coupler PE3, the 3rd input of processor obtains a low-potential signal, processor obtains after this low-potential signal to alarm and display transmitted signal, make alarm equipment alarm, make display show the printed words that main filter 11 lost efficacy, the signal of exporting when differential pressure pickup 17 is during less than the 3rd threshold values, comparator OP3 exports high potential signal, light emitting diode cut-off in photoelectrical coupler PE3, photoelectric tube cut-off in photoelectrical coupler PE3, the 3rd input of processor obtains a high potential signal, signal and the 4th threshold values that the 4th threshold values comparator OP4 exports the second differential pressure pickup 17 compare, the signal of exporting when differential pressure pickup 17 is during less than the 4th threshold values, comparator OP4 exports low-potential signal, light emitting diode conducting in the 4th photoelectrical coupler PE4 and luminous, luminous fulgurite conducting in photoelectrical coupler PE4, the 4th input of processor obtains a low-potential signal, processor receives after this low-potential signal to alarm and display transmitted signal, make alarm equipment alarm, make display show the printed words of main filter 11 breakages, the signal of exporting when the second differential pressure pickup is during greater than the 4th threshold values, comparator OP2 exports high potential signal, light emitting diode cut-off in the 4th photoelectrical coupler PE4, photoelectric tube cut-off in photoelectrical coupler PE4, the 4th input of processor obtains a high potential signal.
Control system provided by the invention also comprises the stepper motor driver for Driving Stepping Motor 24, and it is connected with controller by photoisolator.When the user need to open retractable door, the user presses AN5, after processor receives the signal of AN5 connection, the pulse signal of forward is provided to stepper motor driver through photoelectrical coupler, the motor forward, it drives retractable door and moves up, at this moment Hall switch KH1 and KL1 all disconnect, at this moment continue to press AN5, motor continues forward, and retractable door continues to move up; When moving to topmost, the magnet steel on retractable door is aimed at Hall switch KH1, and KH1 connects, and after processor receives this signal, can not provide signal by photoisolator, and stepper motor is quit work.When the user need to close retractable door, the user presses AN6, after processor receives the signal of AN6 connection, the pulse signal of counter-rotating is provided to stepper motor driver through photoelectrical coupler, motor reversal, it drives retractable door and moves down, at this moment Hall switch KH1 and KL1 all disconnect, at this moment continue to press AN6, motor continues counter-rotating, and retractable door continues to move down; When moving to bottom, the magnet steel on retractable door is aimed at Hall switch KL1, and KL1 connects, and after processor receives this signal, stepper motor is quit work.Between voltage-stabilized power supply and 220V power supply, K switch H2 and KL2 being set, is for when control signal is inoperative, the positive closing power supply.
Below by reference to the accompanying drawings, describe operation principle of the present invention in detail.It is only for explaining claims that but those of ordinary skill in the art should be understood that specification.But protection scope of the present invention is not limited to specification.Any those skilled in the art of being familiar with are in the technical scope that the present invention discloses, and the variation that can expect easily or replacement are within all should being encompassed in protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (6)
1. Biohazard Safety Equipment, described safety cabinet comprises housing, be provided with the operating room in housing, clean room and air circulation system, wherein the clean room is arranged on the operating room, air circulation system is used for circulated air between operating room and clean room, air circulation system comprises the blower fan that is arranged on air inlet place, clean room, it is characterized in that, the clean room comprises contaminant particle material production part and contaminant particle substance decomposition parts, described contaminant particle material production part and contaminant particle substance decomposition parts are successively set on the blowing mouth place of blower fan.
2. Biohazard Safety Equipment according to claim 1, is characterized in that, the described thing particle matter production part that dyes comprises the first ultraviolet lamp, and airborne organic pollution forms the contaminant particle material through the UV-irradiation that ultraviolet lamp sends.
3. Biohazard Safety Equipment according to claim 2, it is characterized in that, contaminant particle substance decomposition parts comprise the second ultraviolet lamp and are arranged on the photocatalyst layer with a plurality of cellular through holes of ultraviolet lamp both sides, applied titanium dioxide granule on the surface of the cellular through hole of described photocatalyst layer.
4. Biohazard Safety Equipment according to claim 3, is characterized in that, is provided with exhaust outlet on the top of clean room, is disposed with the first ozone decomposed device and exhaust-air filter under exhaust outlet.
5. Biohazard Safety Equipment according to claim 4, is characterized in that, sets gradually main filter and the second ozone decomposed device between clean room and operating room.
6. Biohazard Safety Equipment according to claim 5, is characterized in that, described the first ozone decomposed device and the second ozone decomposed utensil have a plurality of cellular through holes, have applied the manganese dioxide particle on the surface of each through hole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310086551.XA CN103127967B (en) | 2013-03-19 | 2013-03-19 | Photocatalyst sterilization biosafety cabinet |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310086551.XA CN103127967B (en) | 2013-03-19 | 2013-03-19 | Photocatalyst sterilization biosafety cabinet |
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| CN103127967B CN103127967B (en) | 2014-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200149762A1 (en) * | 2017-10-13 | 2020-05-14 | Hitachi Industrial Equipment Systems Co., Ltd. | Biosafety Cabinet and Inspection Method of Exhaust Duct Connection |
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| CN1193281A (en) * | 1996-05-15 | 1998-09-16 | 松下电器产业株式会社 | Deodorizing and sterilizing device having catalyst deterioration sensing function |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20200149762A1 (en) * | 2017-10-13 | 2020-05-14 | Hitachi Industrial Equipment Systems Co., Ltd. | Biosafety Cabinet and Inspection Method of Exhaust Duct Connection |
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| CN103127967B (en) | 2014-12-31 |
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