CN110928346A - Biological safety cabinet controlled by speed regulation fan and electric air valve - Google Patents
Biological safety cabinet controlled by speed regulation fan and electric air valve Download PDFInfo
- Publication number
- CN110928346A CN110928346A CN201911265089.3A CN201911265089A CN110928346A CN 110928346 A CN110928346 A CN 110928346A CN 201911265089 A CN201911265089 A CN 201911265089A CN 110928346 A CN110928346 A CN 110928346A
- Authority
- CN
- China
- Prior art keywords
- mcu
- fan
- control
- relay
- speed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D27/00—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00
- G05D27/02—Simultaneous control of variables covered by two or more of main groups G05D1/00 - G05D25/00 characterised by the use of electric means
Abstract
In order to solve the problems that the traditional biological safety cabinet realizes constant control of the wind speed in an operation space by utilizing a mechanical structure, the mechanical structure is complex, the operation is complex, accurate constant control is difficult to achieve, and high-efficiency production is very unfavorable, the invention provides a biological safety cabinet controlled by utilizing a speed-regulating fan and an electric air valve, which comprises: the power supply circuit, MCU, relay drive array, the air inlet fan, the air outlet fan, electrical control valve, signal acquisition module and load equipment, the power adopts the 220V alternating current, the 220V alternating current is after power supply circuit's processing, output 5V direct current and supply with for MCU respectively, signal acquisition module and relay drive array, the direct power supply of regarding as of 220V alternating current simultaneously supplies with for one or more load equipment, MCU passes through computer program control relay drive array, can drive corresponding load equipment work of corresponding load relay drive in the relay drive array after MCU's control signal is received to relay drive array.
Description
Technical Field
The invention relates to the field of pharmaceutical chemical production and operation, in particular to a biosafety cabinet controlled by a speed-regulating fan and an electric air valve.
Background
The biological safety cabinet is widely used in pharmaceutical chemical industry and optical fiber production and application. Traditional biological safety cabinet utilizes mechanical structure to realize the invariable control of wind speed in the operating space, and mechanical structure is complicated, complex operation, and hardly reach accurate invariable control, very unfavorable to high-efficient production.
Disclosure of Invention
In order to solve the problems, the invention provides a biological safety cabinet controlled by a speed-regulating fan and an electric air valve, wherein the rotating speed of the fan and the opening and closing angle of the air valve are controlled by an MCU (microprogrammed control Unit), so that the rotating speed of the fan and the opening and closing angle of the air valve are mutually matched, and the constant control of the air flow rate of an internal operation space of the biological safety cabinet is realized. In addition, the biosafety cabinet disclosed by the invention uses the speed-regulating fan and the electronic regulating air valve, so that the mechanical structure of the integral control is simplified, and the cost can be effectively reduced.
A biosafety cabinet controlled by a speed-regulating fan and an electric air valve comprises: the power supply adopts 220V alternating current, the 220V alternating current is subjected to voltage reduction, rectification, filtering and voltage stabilization processing by the power supply circuit, 5V direct current is output and respectively supplied to the MCU, the signal acquisition module and the relay drive array, the 220V alternating current is directly used as the power supply and supplied to one or more load devices, the MCU controls the relay drive array through a computer program, and the relay drive array can drive corresponding load relays in the relay drive array to drive corresponding load devices to work after receiving control signals of the MCU; the method is characterized in that: the computer program in the MCU comprises the following control steps:
s1, after the MCU is powered on, the program makes initialization configuration to the peripheral resource of the MCU, after the whole program function environment is configured, the program enters a journey mode 1 to circularly execute codes, and the control flow of the biological safety cabinet is started;
s2, after the MCU is powered on, initializing relevant parameters and hardware configuration, and judging whether the air inlet fan and/or the air outlet fan need to be opened;
s3, if the air inlet fan and/or the air outlet fan needs to be opened, the air outlet fan is firstly opened, the air speed of the air outlet fan needs to be controlled at 1-gear speed, then the electric regulating valve is opened to 30 degrees, and the air inlet fan is opened after 2 seconds;
s4, then entering a stroke mode 2, controlling the wind speed of the wind outlet fan and the opening and closing angle of the electric regulating valve through related control keys and making related instructions on the display equipment;
and S5, in the running process of the biological safety cabinet, if a user clicks a power button, the control system of the whole biological safety cabinet is shut down, all loads are shut down after the shutdown, and the electric regulating valve is reset to the 0-degree position to prepare for the next startup.
Further, the processing chip in the voltage stabilizing circuit in the power supply circuit is a 78L05 voltage stabilizing chip.
Furthermore, the model of the main control chip in the MCU is STC15F0XX series chip.
Furthermore, the opening and closing angle range of the electric regulating valve is 0-90 degrees.
Furthermore, the biosafety cabinet controlled by the speed-regulating fan and the electric air valve further comprises one or more of a display module, a man-machine interaction module, a lighting lamp, a sterilizing lamp and/or an alarm module, and the alarm module comprises a buzzer and/or an alarm indicating lamp.
Further, the computer program in the MCU of the biosafety cabinet controlled by the speed-adjusting fan and the electric air valve further includes step S6, when the computer program receives the turn-on signal of the control switch and determines that the internal illumination of the biosafety cabinet needs to be turned on, the MCU controls the relay in the relay driving array to turn on and off the relay of the illumination lamp, so that the illumination lamp is turned on, and an indication is given on the display device; when the computer program receives a closing signal of the control switch and judges that the internal illumination of the biological safety cabinet needs to be closed, the MCU can control the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to stop working, so that the illuminating lamp is closed, and meanwhile, an indication is given on the display equipment.
Further, the computer program in the MCU of the biosafety cabinet controlled by the speed-adjusting fan and the electric air valve further includes step S7, when the computer program receives the turn-on signal of the control switch and determines that the germicidal lamp needs to be turned on, the MCU controls the relay in the relay drive array to turn on and turn off the relay of the illumination lamp, so that the germicidal lamp is turned on, and an indication is given on the display device; when the computer program receives a closing signal of the control switch and judges that the bactericidal lamp of the biological safety cabinet needs to be closed, the MCU controls the relay in the relay driving array to control the turn-on and turn-off of the relay of the bactericidal lamp to stop working, so that the bactericidal lamp is turned off, and meanwhile, an indication is given on the display equipment.
Furthermore, the sterilizing lamp can be turned on only after the glass door of the biological safety cabinet is closed, so that the sterilizing mode can be started to turn on the sterilizing lamp; when the glass door of the biosafety cabinet is opened, the germicidal lamp is directly extinguished.
Further, the computer program in the MCU of the biosafety cabinet controlled by the speed-adjusting fan and the electric air valve further includes a step S8, when the air inlet fan and/or the air outlet fan is operated, if the glass door is opened to a certain extent, the MCU controls the buzzer to operate and/or the alarm indicator to flash, so as to remind the user to close the glass door in time, thereby preventing the polluted gas inside the biosafety cabinet from leaking into the external dustless environment.
The MCU of the biological safety cabinet performs program operation to output control signals by collecting signals collected by keys of human-computer interaction and related sensors, and the relay driving array controls the opening of the air inlet fan and/or the air outlet relay and the electric air valve after receiving the control signals of the MCU, so that the air speed in the biological safety cabinet is stabilized at a user set value. Therefore, the biological safety cabinet can realize the accurate control of the illumination and sterilization of the internal operation space and the constant air speed, reduce the cost, optimize the operation and simplify the mechanical structure of the whole system.
Drawings
FIG. 1 is a circuit diagram of a biosafety cabinet controlled by a speed-regulating fan and an electric air valve.
Detailed Description
Fig. 1 is a circuit diagram of a biosafety cabinet controlled by a speed-regulating fan and an electric air valve.
A biosafety cabinet controlled by a speed-regulating fan and an electric air valve comprises: the power supply adopts 220V alternating current, the 220V alternating current is subjected to voltage reduction, rectification, filtering and voltage stabilization processing by the power supply circuit, 5V direct current is output and respectively supplied to the MCU, the signal acquisition module and the relay drive array, the 220V alternating current is directly used as the power supply and supplied to one or more load devices, the MCU controls the relay drive array through a computer program, and the relay drive array can drive corresponding load relays in the relay drive array to drive corresponding load devices to work after receiving control signals of the MCU; the method is characterized in that: the computer program in the MCU comprises the following control steps:
s1, after the MCU is powered on, the program makes initialization configuration to the peripheral resource of the MCU, after the whole program function environment is configured, the program enters a journey mode 1 to circularly execute codes, and the control flow of the biological safety cabinet is started;
s2, after the MCU is powered on, initializing relevant parameters and hardware configuration, and judging whether the air inlet fan and/or the air outlet fan need to be opened;
s3, if the air inlet fan and/or the air outlet fan needs to be opened, the air outlet fan is firstly opened, the air speed of the air outlet fan needs to be controlled at 1-gear speed, then the electric regulating valve is opened to 30 degrees, and the air inlet fan is opened after 2 seconds;
s4, then entering a stroke mode 2, controlling the wind speed of the wind outlet fan and the opening and closing angle of the electric regulating valve through related control keys and making related instructions on the display equipment;
and S5, in the running process of the biological safety cabinet, if a user clicks a power button, the control system of the whole biological safety cabinet is shut down, all loads are shut down after the shutdown, and the electric regulating valve is reset to the 0-degree position to prepare for the next startup.
The biosafety cabinet controlled by the speed regulation fan and the electric air valve further comprises one or more of a display module, a man-machine interaction module, an illuminating lamp, a sterilizing lamp and/or an alarm module, and the alarm module comprises a buzzer and/or an alarm indicating lamp.
The computer program in the MCU of the biological safety cabinet controlled by the speed regulation fan and the electric air valve also comprises a step S6, when the computer program receives an opening signal of the control switch and judges that the internal illumination of the biological safety cabinet needs to be opened, the MCU controls the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to work, so that the illuminating lamp is opened, and meanwhile, an indication is given on the display equipment; when the computer program receives a closing signal of the control switch and judges that the internal illumination of the biological safety cabinet needs to be closed, the MCU can control the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to stop working, so that the illuminating lamp is closed, and meanwhile, an indication is given on the display equipment.
The computer program in the MCU of the biological safety cabinet controlled by the speed-regulating fan and the electric air valve also comprises a step S7, when the computer program receives an opening signal of the control switch and judges that the germicidal lamp needs to be opened, the MCU controls the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to work, so that the germicidal lamp is opened, and meanwhile, an indication is given on the display equipment; when the computer program receives a closing signal of the control switch and judges that the bactericidal lamp of the biological safety cabinet needs to be closed, the MCU controls the relay in the relay driving array to control the turn-on and turn-off of the relay of the bactericidal lamp to stop working, so that the bactericidal lamp is turned off, and meanwhile, an indication is given on the display equipment.
The sterilizing lamp can be turned on only after the glass door of the biological safety cabinet is closed, so that the sterilizing mode can be turned on; when the glass door of the biosafety cabinet is opened, the germicidal lamp is directly extinguished.
The computer program in the MCU of the biological safety cabinet controlled by the speed regulation fan and the electric air valve further comprises a step S8, when the glass door is opened to a certain degree in the operation process of the air inlet fan and/or the air outlet fan, the MCU can control the buzzer to work and/or the alarm indicator lamp to flash so as to remind a user to close the glass door in time and prevent the polluted gas in the biological safety cabinet from leaking to the external dustless environment.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A biosafety cabinet controlled by a speed-regulating fan and an electric air valve comprises: the power supply adopts 220V alternating current, the 220V alternating current is subjected to voltage reduction, rectification, filtering and voltage stabilization processing by the power supply circuit, 5V direct current is output and respectively supplied to the MCU, the signal acquisition module and the relay drive array, the 220V alternating current is directly used as the power supply and supplied to one or more load devices, the MCU controls the relay drive array through a computer program, and the relay drive array can drive corresponding load relays in the relay drive array to drive corresponding load devices to work after receiving control signals of the MCU; the method is characterized in that: the computer program in the MCU comprises the following control steps:
s1, after the MCU is powered on, the program makes initialization configuration to the peripheral resource of the MCU, after the whole program function environment is configured, the program enters a journey mode 1 to circularly execute codes, and the control flow of the biological safety cabinet is started;
s2, after the MCU is powered on, initializing relevant parameters and hardware configuration, and judging whether the air inlet fan and/or the air outlet fan need to be opened;
s3, if the air inlet fan and/or the air outlet fan needs to be opened, the air outlet fan is firstly opened, the air speed of the air outlet fan needs to be controlled at 1-gear speed, then the electric regulating valve is opened to 30 degrees, and the air inlet fan is opened after 2 seconds;
s4, then entering a stroke mode 2, controlling the wind speed of the wind outlet fan and the opening and closing angle of the electric regulating valve through related control keys and making related instructions on the display equipment;
and S5, in the running process of the biological safety cabinet, if a user clicks a power button, the control system of the whole biological safety cabinet is shut down, all loads are shut down after the shutdown, and the electric regulating valve is reset to the 0-degree position to prepare for the next startup.
2. The biosafety cabinet controlled by the speed-adjustable fan and the electric air valve as claimed in claim 1, wherein: the processing chip in the voltage stabilizing circuit in the power supply circuit is a 78L05 voltage stabilizing chip.
3. The biosafety cabinet controlled by the speed-adjustable fan and the electric air valve as claimed in claim 1, wherein: the model of the main control chip in the MCU is STC15F0XX series chip.
4. The biosafety cabinet controlled by the speed-adjustable fan and the electric air valve as claimed in claim 1, wherein: the opening and closing angle range of the electric regulating valve is 0-90 degrees.
5. The biosafety cabinet controlled by the speed-adjustable fan and the electric air valve as claimed in claim 1, wherein: the biological safety cabinet controlled by the speed-regulating fan and the electric air valve further comprises one or more of a display module, a man-machine interaction module, a lighting lamp, a sterilizing lamp and/or an alarm module, and the alarm module comprises a buzzer and/or an alarm indicating lamp.
6. The biosafety cabinet utilizing speed-regulating fans and electric air valves for control as claimed in claim 5, wherein: the computer program in the MCU of the biological safety cabinet controlled by the speed regulation fan and the electric air valve also comprises a step S6, when the computer program receives an opening signal of the control switch and judges that the internal illumination of the biological safety cabinet needs to be opened, the MCU controls the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to work, so that the illuminating lamp is opened, and meanwhile, an indication is given on the display equipment; when the computer program receives a closing signal of the control switch and judges that the internal illumination of the biological safety cabinet needs to be closed, the MCU can control the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to stop working, so that the illuminating lamp is closed, and meanwhile, an indication is given on the display equipment.
7. The biosafety cabinet utilizing speed-regulating fans and electric air valves for control as claimed in claim 5, wherein: the computer program in the MCU of the biological safety cabinet controlled by the speed-regulating fan and the electric air valve also comprises a step S7, when the computer program receives an opening signal of the control switch and judges that the germicidal lamp needs to be opened, the MCU controls the relay in the relay driving array to control the opening and closing of the relay of the illuminating lamp to work, so that the germicidal lamp is opened, and meanwhile, an indication is given on the display equipment; when the computer program receives a closing signal of the control switch and judges that the bactericidal lamp of the biological safety cabinet needs to be closed, the MCU controls the relay in the relay driving array to control the turn-on and turn-off of the relay of the bactericidal lamp to stop working, so that the bactericidal lamp is turned off, and meanwhile, an indication is given on the display equipment.
8. The biosafety cabinet utilizing speed-regulating fans and electric air valves for control as claimed in claim 5, wherein: the sterilizing lamp can be turned on only after the glass door of the biological safety cabinet is closed, so that the sterilizing mode can be turned on; when the glass door of the biosafety cabinet is opened, the germicidal lamp is directly extinguished.
9. The biosafety cabinet utilizing speed-regulating fans and electric air valves for control as claimed in claim 5, wherein: the computer program in the MCU of the biological safety cabinet controlled by the speed regulation fan and the electric air valve further comprises a step S8, when the glass door is opened to a certain degree in the operation process of the air inlet fan and/or the air outlet fan, the MCU can control the buzzer to work and/or the alarm indicator lamp to flash so as to remind a user to close the glass door in time and prevent the polluted gas in the biological safety cabinet from leaking to the external dustless environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265089.3A CN110928346A (en) | 2019-12-11 | 2019-12-11 | Biological safety cabinet controlled by speed regulation fan and electric air valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911265089.3A CN110928346A (en) | 2019-12-11 | 2019-12-11 | Biological safety cabinet controlled by speed regulation fan and electric air valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110928346A true CN110928346A (en) | 2020-03-27 |
Family
ID=69858825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911265089.3A Pending CN110928346A (en) | 2019-12-11 | 2019-12-11 | Biological safety cabinet controlled by speed regulation fan and electric air valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110928346A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325752A (en) * | 2021-05-12 | 2021-08-31 | 北京戴纳实验科技有限公司 | Equipment management system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961665A (en) * | 2010-09-17 | 2011-02-02 | 上海飞域净化工程有限公司 | Air exhaust control and ultraviolet lamp intelligent control system for biological safety cabinet |
| CN206762898U (en) * | 2017-03-22 | 2017-12-19 | 四川省中安检测有限公司 | A kind of Biohazard Safety Equipment for automatically controlling wind speed |
| CN207694818U (en) * | 2017-12-13 | 2018-08-07 | 青岛康益生物科技有限公司 | Biologic cleanliness safety cabinet |
-
2019
- 2019-12-11 CN CN201911265089.3A patent/CN110928346A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101961665A (en) * | 2010-09-17 | 2011-02-02 | 上海飞域净化工程有限公司 | Air exhaust control and ultraviolet lamp intelligent control system for biological safety cabinet |
| CN206762898U (en) * | 2017-03-22 | 2017-12-19 | 四川省中安检测有限公司 | A kind of Biohazard Safety Equipment for automatically controlling wind speed |
| CN207694818U (en) * | 2017-12-13 | 2018-08-07 | 青岛康益生物科技有限公司 | Biologic cleanliness safety cabinet |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113325752A (en) * | 2021-05-12 | 2021-08-31 | 北京戴纳实验科技有限公司 | Equipment management system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110928346A (en) | Biological safety cabinet controlled by speed regulation fan and electric air valve | |
| CN105953358A (en) | Safety protection method and device for air conditioner and air conditioner | |
| CN109631226A (en) | Two fans control system of air purifier and its control method | |
| CN107642869A (en) | Intelligent ventilating fan system and intelligent ventilating fan device | |
| CN106207974B (en) | Dc motor protector and its operation method | |
| CN102869931B (en) | motor and system controller | |
| CN103148009A (en) | Automatic control system of fan | |
| CN107368024A (en) | Water purifier | |
| CN106556125A (en) | A kind of GIS room ventilations illumination intelligence control system | |
| CN104712568A (en) | Control circuit of electric fan | |
| CN104199497B (en) | Environmental improvement equipment monitoring device and method | |
| CN202803335U (en) | Paper shredder with constant paper shredding speed | |
| CN107049696A (en) | Tooth chair negative-pressure ward signal monitor | |
| CN208794643U (en) | A kind of laboratory pressure automatic-balancing system | |
| CN207654384U (en) | Tooth chair negative-pressure ward signal monitor | |
| CN104503304A (en) | Clean bench control circuit with functions of remote control and appointed timing | |
| CN209879298U (en) | Realization system of interactive integrated ceiling | |
| CN205207232U (en) | A adjustable speed fan for industry and commerce | |
| CN204436848U (en) | A kind of electric fan that automatically can control to close | |
| CN115388595B (en) | Air purification control method, air purification control system and refrigerator | |
| CN104712571A (en) | Control circuit of intelligent fan | |
| CN102607136A (en) | Intelligent control system of central air conditioner | |
| CN213822765U (en) | Air sterilizer with distance measuring function | |
| CN205425307U (en) | Air conditioner extension control system based on single chip microcomputer control | |
| CN201436756U (en) | Motor protector having function of high accuracy ammeter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200327 |
|
| RJ01 | Rejection of invention patent application after publication |