CN113357730A - Intelligent pressure balancing system and pressure balancing method for biosafety laboratory - Google Patents
Intelligent pressure balancing system and pressure balancing method for biosafety laboratory Download PDFInfo
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- CN113357730A CN113357730A CN202110572213.1A CN202110572213A CN113357730A CN 113357730 A CN113357730 A CN 113357730A CN 202110572213 A CN202110572213 A CN 202110572213A CN 113357730 A CN113357730 A CN 113357730A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
- F24F7/08—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit with separate ducts for supplied and exhausted air with provisions for reversal of the input and output systems
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L1/00—Enclosures; Chambers
- B01L1/04—Dust-free rooms or enclosures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/0001—Control or safety arrangements for ventilation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/003—Ventilation in combination with air cleaning
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/30—Velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2120/00—Control inputs relating to users or occupants
- F24F2120/10—Occupancy
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses an intelligent pressure balancing system and a pressure balancing method for a biological safety laboratory, wherein the system comprises: the system comprises a fresh air conditioner, an exhaust fan, an air supply pipeline, an exhaust pipeline, an air supply electric air quantity regulating valve, an air exhaust electric air quantity regulating valve, a pressure sensor, an air quantity sensor, a counter, a temperature measuring instrument, a control terminal and a biological safety cabinet arranged in a biological safety laboratory; the method comprises the following steps: the pressure sensor, the air volume sensor, the counter and the thermodetector send monitoring results to the control terminal, and the control terminal controls the opening angles of the air supply electric air volume regulating valve and the air exhaust electric air volume regulating valve, the opening and closing states of the fresh air conditioner and the air exhaust fan according to set target pressure values, target air speed values, target body temperature intervals of experimenters and fresh air volumes corresponding to different numbers of experimenters. The invention ensures the constant pressure of the biological safety laboratory and meets the standard requirement of the negative pressure type laboratory; the energy is saved, the emission is reduced, and the energy waste is avoided under the condition of meeting the requirements of experimenters.
Description
Technical Field
The invention belongs to the technical field of biological safety experiments, and particularly relates to an intelligent pressure balancing system and a pressure balancing method for a biological safety laboratory.
Background
The country requires highly to biological safety laboratory sealing performance, its component material and structural style pressure-bearing are extremely limited, be furnished with the biological safety cabinet of full row type in this laboratory, when the biological safety cabinet is opened, the volume of airing exhaust in the laboratory increases, the negative pressure also increases, atmospheric pressure changes thereupon in the laboratory, therefore original pressure in the laboratory can be destroyed, can't satisfy the pressure differential requirement of national standard to this laboratory, the poor leakproofness that makes laboratory major structure suffer damage and the condition that reduces of different degree in the laboratory can appear.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the problems in the prior art, the invention discloses an intelligent pressure balance system and a pressure balance method for a biological safety laboratory, so that the pressure difference in the biological safety laboratory reaches the design requirement, the pressure constancy of the biological safety laboratory is ensured, and the standard requirement of a negative pressure type laboratory is met.
The technical scheme is as follows: the invention adopts the following technical scheme: the utility model provides a biological safety laboratory intelligence pressure balance system, its characterized in that includes fresh air conditioner, exhaust fan, control terminal and sets up in biological safety laboratory's an at least complete type of arranging biological safety cabinet, all is equipped with the run switch on every biological safety cabinet, wherein:
the fresh air conditioner comprises a blower, and is divided into a first fresh air conditioner and other fresh air conditioners, wherein the first fresh air conditioner is connected into a biological safety laboratory through a first air supply pipeline, each other fresh air conditioner is connected into a biological safety cabinet through another air supply pipeline, the air supply pipelines are provided with electric air quantity regulating valves for air supply, and are used for regulating air supply quantity, and the air quantity sensors for monitoring air supply speed in real time are arranged in the air supply pipelines;
the exhaust fan is divided into a first exhaust fan and other exhaust fans, the first exhaust fan is connected into the biological safety laboratory through a first exhaust pipeline, each other exhaust fan is connected into a biological safety cabinet through another exhaust pipeline, an exhaust electric air quantity regulating valve is arranged on each exhaust pipeline and used for regulating the exhaust air quantity, an air quantity sensor is arranged in each exhaust pipeline and used for monitoring the exhaust air speed in real time, and a first pressure sensor is arranged in each first exhaust pipeline and used for monitoring the pressure value in each exhaust air pipe;
the biological safety laboratory is internally provided with a second pressure sensor, a counter and a temperature measuring instrument, wherein the second pressure sensor is used for monitoring the pressure value in the biological safety laboratory in real time, the temperature measuring instrument is used for monitoring the body temperature of the experimenters in the biological safety laboratory in real time, and the counter is used for monitoring the number of the experimenters in real time;
the control terminal is connected with the first pressure sensor, the second pressure sensor, the air quantity sensor, the counter, the thermodetector, the air supply electric air quantity regulating valve, the air exhaust electric air quantity regulating valve, the fresh air conditioner, other exhaust fans and an operation switch signal, the control terminal is connected with the first exhaust fan through an air exhaust frequency converter in a signal mode, the first pressure sensor, the second pressure sensor, the air quantity sensor, the counter and the thermodetector send monitoring results to the control terminal, and the control terminal controls the opening angles of the air supply electric air quantity regulating valve and the air exhaust electric air quantity regulating valve and the on-off states of the fresh air conditioner and the exhaust fans according to set target pressure values, target air speed values, target body temperature intervals of experimenters and fresh air quantities corresponding to different numbers of experimenters.
Preferably, the first fresh air conditioner is linked with the first exhaust fan, namely the first fresh air conditioner and the first exhaust fan are simultaneously opened and closed;
each biological safety cabinet is linked with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet, namely, the operation switch of each biological safety cabinet is simultaneously opened and simultaneously closed with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet.
Preferably, a high efficiency filter is arranged on the blast pipe.
Preferably, fire-proof valves are arranged on the air supply pipeline and the air exhaust pipeline.
Preferably, a check valve is provided on the exhaust duct.
Preferably, the pressure sensor, the air quantity sensor, the counter and the temperature measuring instrument are in signal connection with the control terminal in an RS485 communication mode.
An intelligent pressure balancing method for a biological safety laboratory is applied to the intelligent pressure balancing system for the biological safety laboratory and is characterized in that,
the real-time pressure value and output signal to control terminal in the biological safety laboratory of second pressure sensor monitoring, control terminal carries out the comparison according to real-time pressure value and predetermined target pressure value, calculates and feedback signal to the electronic air volume damper of airing exhaust on the electronic air volume damper of air supply on the first air supply pipeline and the first exhaust duct: if the real-time pressure value is larger than the target pressure value, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve and increases the opening angle of the air exhaust electric air volume adjusting valve, so that the real-time pressure value in the biological safety laboratory is reduced to reach the preset target pressure value; if the real-time pressure value is smaller than the target pressure value, the control terminal increases the opening angle of the air supply electric air volume adjusting valve and decreases the opening angle of the air exhaust electric air volume adjusting valve, so that the real-time pressure value in the biological safety laboratory is increased to reach the preset target pressure value;
first pressure sensor monitors the real-time pressure value in the first exhaust duct and output signal to control terminal, and control terminal carries out the comparison according to real-time pressure value and predetermined target pressure value, calculates and feedback signal to the converter of airing exhaust of first exhaust fan, and the converter of airing exhaust controls the volume of airing exhaust of first exhaust fan: if the real-time pressure value is larger than the target pressure value, the control terminal controls the air exhaust frequency converter to increase the air exhaust quantity of the first exhaust fan, so that the preset target pressure value is reached; if the real-time pressure value is smaller than the target pressure value, the control terminal controls the air exhaust frequency converter to reduce the air exhaust amount of the first exhaust fan, so that the preset target pressure value is reached;
the air quantity sensor monitors a real-time air speed value in the air supply pipeline and outputs a signal to the control terminal, the control terminal compares the real-time air speed value with a preset target air speed value, and calculates and feeds back a signal to an air supply electric air quantity regulating valve corresponding to the air supply pipeline: if the real-time air speed value is larger than the target air speed value, the control terminal reduces the opening angle of the air supply electric air quantity regulating valve, so that the real-time air speed value reaches the preset target air speed value; if the real-time air speed value is smaller than the target air speed value, the control terminal increases the opening angle of the air supply electric air quantity regulating valve, so that the real-time air speed value reaches the preset target air speed value;
the air volume sensor monitors a real-time air speed value in the exhaust pipeline and outputs a signal to the control terminal, the control terminal compares the real-time air speed value with a preset target air speed value, and calculates and feeds back signals to an exhaust fan and an exhaust electric air volume regulating valve corresponding to the exhaust pipeline: if the real-time wind speed value is larger than the target wind speed value, the control terminal reduces the exhaust volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve, wherein the first exhaust fan is adjusted through an exhaust frequency converter, so that the real-time wind speed value reaches the preset target wind speed value; if the real-time wind speed value is smaller than the target wind speed value, the control terminal increases the exhaust air volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve, wherein the first exhaust fan is adjusted through an exhaust frequency converter, so that the real-time wind speed value reaches the preset target wind speed value;
the temperature measuring instrument monitors the real-time body temperature value of an experimenter and outputs a signal to the controller terminal, the control terminal compares the real-time body temperature value with a preset target body temperature value, and calculates and feeds back the signal to the first fresh air conditioner: if the real-time body temperature value of the experimenter is higher than the upper limit of the target body temperature value interval, the control terminal feeds back a cooling signal to the first fresh air conditioner, and the first fresh air conditioner starts a refrigeration mode, so that the body temperature of the experimenter is reduced to the target body temperature value interval; if the real-time body temperature value of the experimenter is lower than the lower limit of the target body temperature value interval, the control terminal feeds back a heating signal to the first fresh air conditioner, and the first fresh air conditioner starts a heating mode, so that the real-time body temperature value of the experimenter is increased to the target body temperature value interval;
the counter monitors the real-time number of the experimenters and outputs a signal to the control terminal, the control terminal compares the corresponding fresh air volume of the number of the real-time number of the experimenters with the number of different experimenters, and calculates and feeds back a signal to the air supply electric air volume adjusting valve of the first air supply pipeline and the air exhaust electric air volume adjusting valve of the first air exhaust pipeline: if the number of people increases in real time, the control terminal increases the opening angle of the air supply electric air volume adjusting valve and increases the opening angle of the air exhaust electric air volume adjusting valve; if the number of people is reduced in real time, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve and reduces the opening angle of the air exhaust electric air volume adjusting valve.
Preferably, the control terminal controls the opening and closing of the fresh air conditioner and the exhaust fan connected with the control terminal according to the operation switch of the biological safety cabinet: if an operation switch of one biological safety cabinet is opened, the operation switch outputs a signal to a control terminal, the control terminal feeds back a signal to a fresh air conditioner and an exhaust fan which are connected with the biological safety cabinet, and the fresh air conditioner and the exhaust fan are sequentially opened; if the operation switch of one biosafety cabinet is closed, the operation switch outputs a signal to the control terminal, the control terminal feeds back a signal to the fresh air conditioner and the exhaust fan which are connected with the biosafety cabinet, and the exhaust fan and the fresh air conditioner are sequentially closed.
Has the advantages that: the invention has the following beneficial effects:
1. according to the invention, the environmental quantities in the biological safety laboratory and the pipeline are monitored in real time through the pressure sensor, the air quantity sensor, the counter and the temperature measuring instrument, and the control terminal adjusts the fresh air conditioner, the exhaust fan, the air supply electric air quantity regulating valve and the air exhaust electric air quantity regulating valve according to the environmental quantities, so that the pressure difference in the biological safety laboratory reaches the design requirement, the pressure constancy of the biological safety laboratory is ensured, and the standard requirement of a negative pressure type laboratory is met;
2. according to the invention, the biological safety cabinet, the fresh air conditioner and the exhaust fan which are connected with the biological safety cabinet are simultaneously opened and closed, so that energy conservation and emission reduction can be realized, and unnecessary waste of energy can be avoided;
3. according to the invention, the air supply volume and the air exhaust volume in the biological safety laboratory can be adaptively adjusted according to the number of experimenters, so that the energy is saved, the emission is reduced and unnecessary waste of energy is avoided under the condition of meeting the requirements of the biological safety laboratory and the requirements of the experimenters on fresh air.
Drawings
FIG. 1 is a schematic diagram of a system architecture according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a system control in one embodiment of the invention;
fig. 3 is a first exhaust fan control diagram of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The invention discloses an intelligent pressure balance system for a biological safety laboratory, which comprises a fresh air conditioner, an exhaust fan, an electric air volume regulating valve, a pressure sensor, an air volume sensor, a counter, a thermodetector, a control terminal and at least one full-row biological safety cabinet arranged in the biological safety laboratory, wherein each biological safety cabinet is provided with an operation switch; wherein:
the electric air volume adjusting valve comprises an air supply electric air volume adjusting valve and an air exhaust electric air volume adjusting valve.
The novel air conditioner comprises an air feeder, the novel air conditioner is divided into a first novel air conditioner and other novel air conditioners, the first novel air conditioner is connected to a biological safety laboratory through a first air supply pipeline, each other novel air conditioners are connected to a biological safety cabinet through other air supply pipelines, an electric air volume adjusting valve for air supply is arranged on the first air supply pipeline and the other air supply pipelines, the air volume is adjusted, and air volume sensors are arranged in the first air supply pipeline and the other air supply pipelines and used for monitoring the air supply speed in real time.
The exhaust fan divide into first exhaust fan and other exhaust fans, first exhaust fan is connected to in the biological safety laboratory through first exhaust duct, every other exhaust fan respectively through in other exhaust duct are connected to a biological safety cabinet, be equipped with the electronic air regulation valve of airing exhaust on first exhaust duct and other exhaust duct, a volume of airing exhaust is used for adjusting, be equipped with air sensor in first exhaust duct and other exhaust duct, a wind speed for real-time supervision airs exhaust, be equipped with first pressure sensor in the first exhaust duct, a pressure value in the first exhaust duct is used for implementing the monitoring.
The first fresh air conditioner is linked with the first exhaust fan, namely the first fresh air conditioner and the first exhaust fan are simultaneously opened and closed; each biological safety cabinet is linked with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet, namely, the operation switch of each biological safety cabinet is simultaneously opened and simultaneously closed with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet. The biological safety cabinet and the fresh air conditioner and the exhaust fan connected with the biological safety cabinet are simultaneously opened and closed, so that energy conservation and emission reduction can be realized, and unnecessary waste of energy is avoided.
The biological safety laboratory is equipped with second pressure sensor, counter and thermoscope in the biological safety laboratory, and second pressure sensor is used for the pressure value in the real-time supervision biological safety laboratory, and the thermoscope is used for the body temperature of the experimenter in the real-time supervision biological safety laboratory, and the counter is used for the number of real-time supervision experimenter.
The control terminal is in signal connection with the first pressure sensor, the second pressure sensor, the air quantity sensor, the counter, the temperature measuring instrument, the electric air quantity regulating valve, the fresh air conditioner and the operation switch of the biological safety cabinet, the control terminal is in signal connection with the first exhaust fan through the exhaust frequency converter, and the control terminal is in signal connection with other exhaust fans. The first pressure sensor, the second pressure sensor, the air quantity sensor, the counter and the temperature measuring instrument send monitoring results to the control terminal in an RS485 communication mode, and the control terminal controls the opening angle of the electric air quantity regulating valve, the on-off state of the fresh air conditioner and the on-off state of the exhaust fan according to set target pressure values, target air speed values, target body temperature values of experimenters and fresh air quantities corresponding to different experimenters.
According to the intelligent pressure balance system for the biosafety laboratory, the high-efficiency filter is arranged on the air supply pipeline and used for filtering suspended matters in fresh air; fire valves are arranged on the air supply pipeline and the air exhaust pipeline, are normally opened, are closed at 70 degrees and have the function of fire shutoff; the exhaust pipe is provided with a check valve to prevent gas from flowing back when a fire disaster occurs or the fan stops suddenly.
The invention also discloses an intelligent pressure balancing method for the biological safety laboratory, which is applied to the intelligent pressure balancing system for the biological safety laboratory, wherein:
control terminal is according to the operation on-off control of biohazard safety equipment rather than opening and closing of the new trend air conditioner, the exhaust fan of being connected, specifically is: if an operation switch of one biological safety cabinet is opened, the operation switch outputs a signal to a control terminal, the control terminal feeds back a signal to a fresh air conditioner and an exhaust fan which are connected with the biological safety cabinet, and the fresh air conditioner and the exhaust fan are sequentially opened; if the operation switch of one biosafety cabinet is closed, the operation switch outputs a signal to the control terminal, the control terminal feeds back a signal to the fresh air conditioner and the exhaust fan which are connected with the biosafety cabinet, and the exhaust fan and the fresh air conditioner are sequentially closed.
The control terminal compares the real-time pressure value monitored by the first pressure sensor and the second pressure sensor with a preset target pressure value, and controls the working states of the air supply electric air volume regulating valve, the air exhaust electric air volume regulating valve and the first exhaust fan according to a comparison result, and the control terminal specifically comprises:
the second pressure sensor monitors the pressure value in the biosafety laboratory in real time, the second pressure sensor outputs a signal to the control terminal, and the control terminal calculates and feeds back a signal to the air supply electric air volume regulating valve on the first air supply pipeline and the air exhaust electric air volume regulating valve on the first air exhaust pipeline: if the real-time pressure value P1 is greater than the target pressure value P01 in the biological safety laboratory, the control terminal adjusts the air supply electric air volume adjusting valve and the air exhaust electric air volume adjusting valve, reduces the opening angle of the air supply electric air volume adjusting valve, reduces the air supply volume, increases the opening angle of the air exhaust electric air volume adjusting valve, and increases the air exhaust volume, so that the real-time pressure value P1 in the biological safety laboratory is reduced, and the preset target pressure value P01 is reached; if the real-time pressure value P1 is smaller than the target pressure value P01 in the biological safety laboratory, the control terminal adjusts the air supply electric air volume adjusting valve and the air exhaust electric air volume adjusting valve, increases the opening angle of the air supply electric air volume adjusting valve, increases the air supply volume, decreases the opening angle of the air exhaust electric air volume adjusting valve, and reduces the air exhaust volume, so that the real-time pressure value P1 in the biological safety laboratory is increased, and the preset target pressure value P01 is reached;
the first pressure sensor monitors the pressure value in the first exhaust pipeline in real time, the first pressure sensor outputs a signal to the control terminal, the control terminal calculates and feeds back a signal to the exhaust frequency converter of the first exhaust fan, and the exhaust frequency converter controls the exhaust volume of the first exhaust fan: if the real-time pressure value P2 is larger than the target pressure value P02 in the first exhaust pipeline, the control terminal outputs a signal to the exhaust frequency converter, and the exhaust frequency converter controls the first exhaust fan to increase the exhaust volume to reach a preset target pressure value P02; if the real-time pressure value P2 is smaller than the target pressure value P02 in the first exhaust pipeline, the control terminal outputs a signal to the exhaust frequency converter, and the exhaust frequency converter controls the first exhaust fan to reduce the exhaust air volume and achieve the preset target pressure value P02.
The control terminal compares the real-time wind speed value monitored by the wind sensor with a preset target wind speed value, and controls the working states of the exhaust fan, the air supply electric wind volume regulating valve and the air exhaust electric wind volume regulating valve according to a comparison result, and the control method specifically comprises the following steps: the air volume sensor monitors the air speed value in real time, outputs a signal to the control terminal, and the control terminal calculates and feeds back the signal to the exhaust fan, the air supply electric air volume regulating valve and the air exhaust electric air volume regulating valve:
if the real-time wind speed value V1 in the air supply pipeline is greater than the target wind speed value V01, the control terminal adjusts the air supply electric air volume adjusting valve corresponding to the air supply pipeline, reduces the opening angle of the air supply electric air volume adjusting valve, reduces the air supply volume, and enables the real-time wind speed value V1 to reach the preset target wind speed value V01; if the real-time wind speed value V1 in the air supply pipeline is smaller than the target wind speed value V01, the control terminal adjusts the air supply electric air volume adjusting valve corresponding to the air supply pipeline, the opening angle of the air supply electric air volume adjusting valve is increased, the air supply volume is increased, and therefore the real-time wind speed value V1 reaches the preset target wind speed value V01;
if the real-time wind speed value V2 in the exhaust pipeline is greater than the target wind speed value V02, the control terminal adjusts an exhaust fan and an exhaust electric air volume adjusting valve corresponding to the exhaust pipeline, wherein the first exhaust fan is adjusted by an exhaust frequency converter, the exhaust volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve are reduced, the exhaust volume is reduced, and therefore the real-time wind speed value V2 reaches the preset target wind speed value V02; if the real-time wind speed value V2 in the exhaust duct is smaller than the target wind speed value V02, the control terminal adjusts the exhaust fan and the exhaust electric air volume adjusting valve corresponding to the exhaust duct, wherein the first exhaust fan is adjusted by the exhaust frequency converter, the exhaust volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve are increased, the exhaust volume is increased, and therefore the real-time wind speed value V2 reaches the preset target wind speed value V02.
The control terminal compares the real-time body temperature value of the experimenter monitored by the thermodetector with a preset target body temperature value and controls the working state of the first fresh air conditioner according to a comparison result, and the control method specifically comprises the following steps: the temperature measuring instrument monitors the body temperature value of an experimenter in real time, outputs a signal to the controller terminal, and the control terminal calculates and feeds back the signal to the first fresh air conditioner: if the real-time body temperature value of the experimenter is higher than the upper limit of the target body temperature value interval, the control terminal feeds back a cooling signal to the first fresh air conditioner, and the first fresh air conditioner starts a refrigeration mode to reduce the temperature in the biological safety laboratory, so that the body temperature of the experimenter is reduced to the target body temperature value interval; if the real-time body temperature value of the experimenter is lower than the lower limit of the target body temperature value interval, the control terminal feeds back a heating signal to the first fresh air conditioner, and the first fresh air conditioner starts a heating mode to raise the temperature in the biological safety laboratory, so that the real-time body temperature value of the experimenter is raised to the target body temperature value interval.
The control terminal compares the real-time number of the laboratory experimenters in the biological safety laboratory monitored by the counter with the corresponding fresh air volume of different experimenters, and controls the working states of the air supply electric air volume adjusting valve and the air exhaust electric air volume adjusting valve according to the comparison result, and the control terminal specifically comprises: the counter real-time supervision experimenter number, counter output signal to control terminal, control terminal calculate and feedback signal to the electronic air regulation valve of airing exhaust of the electronic air regulation valve of air supply pipeline and first exhaust duct: if the number of the experimenters is increased, the control terminal feeds back signals to the air supply electric air volume adjusting valve and the air exhaust electric air volume adjusting valve, the opening angle of the air supply electric air volume adjusting valve is increased, the air supply volume is increased, the opening angle of the air exhaust electric air volume adjusting valve is increased, and the air exhaust volume is increased, so that indoor air keeps certain oxygen content, and the requirement of the experimenters on fresh air is met; if the number of the experimenters is reduced, the control terminal calculates and feeds back signals to the air supply electric air volume adjusting valve and the air exhaust electric air volume adjusting valve, the opening angle of the air supply electric air volume adjusting valve is reduced, the air supply volume is reduced, the opening angle of the air exhaust electric air volume adjusting valve is reduced, the air exhaust volume is reduced, the energy is saved, the emission is reduced, and unnecessary waste of energy is avoided under the condition that the requirements of a biological safety laboratory and the requirements of the experimenters on fresh air are met.
Examples
As shown in fig. 1 to 3, an intelligent pressure balance system for a biosafety laboratory comprises a fresh air conditioner 1, a fresh air conditioner 2, an exhaust fan 1, an exhaust fan 2 and a full-row biosafety cabinet arranged in the biosafety laboratory, wherein the biosafety cabinet is provided with an operation switch; wherein:
the fresh air conditioner 1 and the fresh air conditioner 2 both comprise air supply fans, the fresh air conditioner 1 is connected into a biological safety laboratory through an air supply pipeline 1, an air supply electric air quantity adjusting valve 1 and an air quantity sensor 1 are arranged on the air supply pipeline 1, and a high-efficiency filter and a fire-proof valve are arranged on the air supply pipeline 1; fresh air conditioner 2 is connected to in the biological safety cabinet through supply air duct 2, is equipped with air supply electric air volume adjusting valve 2 and air sensor 2 on the supply air duct 2, is equipped with high efficiency filter and fire prevention valve on the supply air duct 2.
The exhaust fan 1 is connected to a biological safety laboratory through an exhaust pipeline 1, an exhaust electric air quantity regulating valve 1, a pressure sensor 1 and an air quantity sensor 3 are arranged on the exhaust pipeline 1, and a fire valve and a check valve are arranged on the exhaust pipeline 1; the exhaust fan 2 is connected to the biological safety cabinet through an exhaust pipeline 2, an exhaust electric air volume adjusting valve 2 and an air volume sensor 4 are arranged on the exhaust pipeline 2, and a fire damper and a check valve are arranged on the exhaust pipeline 2.
The fresh air conditioner 1 is linked with the exhaust fan 1; the biological safety cabinet is linked with a fresh air conditioner 2 and an exhaust fan 2.
The biological safety laboratory is internally provided with a pressure sensor 2, a counter and a temperature measuring instrument, the control terminal is in signal connection with the operation switches of the 2 pressure sensors, the 4 air volume sensors, the counter, the temperature measuring instrument, the 2 air supply electric air volume adjusting valves, the 2 air exhaust electric air volume adjusting valves, the 2 fresh air conditioners, the exhaust fan 2 and the biological safety cabinet, and the control terminal is in signal connection with the exhaust fan 1 through the air exhaust frequency converter. The pressure sensor, the air quantity sensor, the counter and the temperature measuring instrument send monitoring results to the control terminal in an RS485 communication mode, and the control terminal controls the opening angles of the air supply electric air quantity regulating valve and the air exhaust electric air quantity regulating valve, the on-off state of the fresh air conditioner and the on-off state of the exhaust fan according to set target pressure values, target air speed values, target body temperature values of experimenters and fresh air quantities corresponding to different experimenters.
The pressure balancing method applied to the intelligent pressure balancing system of the biosafety laboratory in the embodiment comprises the following steps:
if the operation switch of the biological safety cabinet is started, the operation switch outputs a signal to the control terminal, the control terminal feeds back the signal to the fresh air conditioner 2 and the exhaust fan 2, and the fresh air conditioner 2 and the exhaust fan 2 are started in sequence; if the operation switch of the biosafety cabinet is closed, the operation switch outputs a signal to the control terminal, the control terminal feeds back a signal to the fresh air conditioner 2 and the exhaust fan 2, and the exhaust fan 2 and the fresh air conditioner 2 are closed in sequence.
If the pressure sensor 2 detects that the real-time pressure value P1 in the biological safety laboratory is greater than the target pressure value P01, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve 1, reduces the air supply volume, increases the opening angle of the air exhaust electric air volume adjusting valve 1, and increases the air exhaust volume, so that the real-time pressure value P1 in the biological safety laboratory is reduced to reach the preset target pressure value P01; if the pressure sensor 2 detects that the real-time pressure value P1 in the biosafety laboratory is smaller than the target pressure value P01, the control terminal increases the opening angle of the air supply electric air volume adjusting valve 1, so that the air supply volume is increased, the opening angle of the air exhaust electric air volume adjusting valve 1 is reduced, and the air exhaust volume is reduced, so that the real-time pressure value P1 in the biosafety laboratory is increased, and the preset target pressure value P01 is reached.
If the pressure sensor 1 detects that the real-time pressure value P2 in the exhaust pipeline 1 is greater than the target pressure value P02, the control terminal controls the exhaust frequency converter 1 to increase the exhaust volume of the exhaust fan 1 to reach the preset target pressure value P02; if the pressure sensor 1 detects that the real-time pressure value P2 in the exhaust duct 1 is smaller than the target pressure value P02, the control terminal controls the exhaust frequency converter 1 to reduce the exhaust volume of the exhaust fan 1 to reach the preset target pressure value P02.
If the air volume sensor 1 detects that the real-time air volume value V1 in the air supply pipeline 1 is greater than the target air volume value V01, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve 1 to reduce the air supply volume, so that the real-time air volume value V1 reaches the preset target air volume value V01; if the air volume sensor 1 detects that the real-time air volume value V1 in the air supply pipeline 1 is smaller than the target air volume value V01, the control terminal increases the opening angle of the air supply electric air volume adjusting valve 1 to increase the air supply volume, so that the real-time air volume value V1 reaches the preset target air volume value V01. The processing flows of the air quantity sensor 2 and the air supply electric air quantity regulating valve 2 in the air supply pipeline 2 are the same as the processing flows of the air quantity sensor 1 and the air supply electric air quantity regulating valve 1 in the air supply pipeline 1.
If the air volume sensor 3 detects that the real-time air speed value V2 in the exhaust duct 1 is greater than the target air speed value V02, the control terminal controls the exhaust frequency converter 1 to reduce the exhaust air volume of the exhaust fan 1 and the opening angle of the exhaust electric air volume adjusting valve 1, so that the exhaust air volume is reduced, and the real-time air speed value V2 reaches the preset target air speed value V02; if the air volume sensor 3 detects that the real-time air speed value V2 in the exhaust duct 1 is smaller than the target air speed value V02, the control terminal controls the exhaust frequency converter 1 to increase the exhaust air volume of the exhaust fan 1 and increase the opening angle of the exhaust electric air volume adjusting valve 1, so that the exhaust air volume is increased, and the real-time air speed value V2 reaches the preset target air speed value V02. The processing flows of the air quantity sensor 4 and the air exhaust electric air quantity regulating valve 2 in the air exhaust pipeline 2 are the same as the processing flows of the air quantity sensor 3 and the air exhaust electric air quantity regulating valve 1 in the air exhaust pipeline 1.
If the real-time body temperature value of the experimenter in the biological safety laboratory monitored by the temperature measuring instrument in real time is higher than the upper limit of the target body temperature value interval by 37.3 ℃, the control terminal controls the fresh air conditioner 1 to start a refrigeration mode to reduce the temperature in the biological safety laboratory, so that the body temperature of the experimenter is reduced to the target body temperature value interval; if the real-time body temperature value of the experimenter monitored by the temperature measuring instrument in real time is lower than the lower limit of the target body temperature value interval by 36 ℃, the control terminal controls the fresh air conditioner 1 to start the heating mode to raise the temperature in the biological safety laboratory, so that the real-time body temperature value of the experimenter is raised to the target body temperature value interval.
If the number of the laboratory experimenters in the biological safety laboratory monitored by the counter in real time is increased, the control terminal increases the opening angle of the air supply electric air quantity adjusting valve 1 to increase the air supply quantity, increases the opening angle of the air exhaust electric air quantity adjusting valve 1 to increase the air exhaust quantity, so that the indoor air keeps certain oxygen content and meets the requirement of the experimenters on fresh air; if the number of the experimenters monitored by the counter in real time is reduced, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve 1, reduces the air supply volume, reduces the opening angle of the air exhaust electric air volume adjusting valve 1, reduces the air exhaust volume, saves energy, reduces emission and avoids unnecessary waste of energy sources under the condition of meeting the requirements of a biological safety laboratory and the requirements of the experimenters on fresh air.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (8)
1. The utility model provides a biological safety laboratory intelligence pressure balance system, its characterized in that includes fresh air conditioner, exhaust fan, control terminal and sets up in biological safety laboratory's an at least complete type of arranging biological safety cabinet, all is equipped with the run switch on every biological safety cabinet, wherein:
the fresh air conditioner comprises a blower, and is divided into a first fresh air conditioner and other fresh air conditioners, wherein the first fresh air conditioner is connected into a biological safety laboratory through a first air supply pipeline, each other fresh air conditioner is connected into a biological safety cabinet through another air supply pipeline, the air supply pipelines are provided with electric air quantity regulating valves for air supply, and are used for regulating air supply quantity, and the air quantity sensors for monitoring air supply speed in real time are arranged in the air supply pipelines;
the exhaust fan is divided into a first exhaust fan and other exhaust fans, the first exhaust fan is connected into the biological safety laboratory through a first exhaust pipeline, each other exhaust fan is connected into a biological safety cabinet through another exhaust pipeline, an exhaust electric air quantity regulating valve is arranged on each exhaust pipeline and used for regulating the exhaust air quantity, an air quantity sensor is arranged in each exhaust pipeline and used for monitoring the exhaust air speed in real time, and a first pressure sensor is arranged in each first exhaust pipeline and used for monitoring the pressure value in each exhaust air pipe;
the biological safety laboratory is internally provided with a second pressure sensor, a counter and a temperature measuring instrument, wherein the second pressure sensor is used for monitoring the pressure value in the biological safety laboratory in real time, the temperature measuring instrument is used for monitoring the body temperature of the experimenters in the biological safety laboratory in real time, and the counter is used for monitoring the number of the experimenters in real time;
the control terminal is connected with the first pressure sensor, the second pressure sensor, the air quantity sensor, the counter, the thermodetector, the air supply electric air quantity regulating valve, the air exhaust electric air quantity regulating valve, the fresh air conditioner, other exhaust fans and an operation switch signal, the control terminal is connected with the first exhaust fan through an air exhaust frequency converter in a signal mode, the first pressure sensor, the second pressure sensor, the air quantity sensor, the counter and the thermodetector send monitoring results to the control terminal, and the control terminal controls the opening angles of the air supply electric air quantity regulating valve and the air exhaust electric air quantity regulating valve and the on-off states of the fresh air conditioner and the exhaust fans according to set target pressure values, target air speed values, target body temperature intervals of experimenters and fresh air quantities corresponding to different numbers of experimenters.
2. The intelligent pressure balance system for biosafety laboratories according to claim 1, wherein the first fresh air conditioner is linked with the first exhaust fan, i.e. the first fresh air conditioner and the first exhaust fan are turned on and off simultaneously;
each biological safety cabinet is linked with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet, namely, the operation switch of each biological safety cabinet is simultaneously opened and simultaneously closed with one other fresh air conditioner and one other exhaust fan which are connected with the biological safety cabinet.
3. The intelligent pressure balance system for biosafety laboratories as claimed in claim 1, wherein a high efficiency filter is provided on the supply air duct.
4. The intelligent pressure balance system for biosafety laboratories according to claim 1, wherein fire valves are provided on both the supply air duct and the exhaust air duct.
5. The biosafety laboratory intelligent pressure equalization system of claim 4, wherein a check valve is disposed on the exhaust duct.
6. The intelligent pressure balance system of biological safety laboratory according to claim 1, characterized in that the pressure sensor, the air quantity sensor, the counter and the temperature detector are connected with the control terminal by signal in RS485 communication mode.
7. An intelligent pressure balancing method for biosafety laboratories, which is applied to the intelligent pressure balancing system for biosafety laboratories claimed in any one of claims 1 to 6,
the real-time pressure value and output signal to control terminal in the biological safety laboratory of second pressure sensor monitoring, control terminal carries out the comparison according to real-time pressure value and predetermined target pressure value, calculates and feedback signal to the electronic air volume damper of airing exhaust on the electronic air volume damper of air supply on the first air supply pipeline and the first exhaust duct: if the real-time pressure value is larger than the target pressure value, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve and increases the opening angle of the air exhaust electric air volume adjusting valve, so that the real-time pressure value in the biological safety laboratory is reduced to reach the preset target pressure value; if the real-time pressure value is smaller than the target pressure value, the control terminal increases the opening angle of the air supply electric air volume adjusting valve and decreases the opening angle of the air exhaust electric air volume adjusting valve, so that the real-time pressure value in the biological safety laboratory is increased to reach the preset target pressure value;
first pressure sensor monitors the real-time pressure value in the first exhaust duct and output signal to control terminal, and control terminal carries out the comparison according to real-time pressure value and predetermined target pressure value, calculates and feedback signal to the converter of airing exhaust of first exhaust fan, and the converter of airing exhaust controls the volume of airing exhaust of first exhaust fan: if the real-time pressure value is larger than the target pressure value, the control terminal controls the air exhaust frequency converter to increase the air exhaust quantity of the first exhaust fan, so that the preset target pressure value is reached; if the real-time pressure value is smaller than the target pressure value, the control terminal controls the air exhaust frequency converter to reduce the air exhaust amount of the first exhaust fan, so that the preset target pressure value is reached;
the air quantity sensor monitors a real-time air speed value in the air supply pipeline and outputs a signal to the control terminal, the control terminal compares the real-time air speed value with a preset target air speed value, and calculates and feeds back a signal to an air supply electric air quantity regulating valve corresponding to the air supply pipeline: if the real-time air speed value is larger than the target air speed value, the control terminal reduces the opening angle of the air supply electric air quantity regulating valve, so that the real-time air speed value reaches the preset target air speed value; if the real-time air speed value is smaller than the target air speed value, the control terminal increases the opening angle of the air supply electric air quantity regulating valve, so that the real-time air speed value reaches the preset target air speed value;
the air volume sensor monitors a real-time air speed value in the exhaust pipeline and outputs a signal to the control terminal, the control terminal compares the real-time air speed value with a preset target air speed value, and calculates and feeds back signals to an exhaust fan and an exhaust electric air volume regulating valve corresponding to the exhaust pipeline: if the real-time wind speed value is larger than the target wind speed value, the control terminal reduces the exhaust volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve, wherein the first exhaust fan is adjusted through an exhaust frequency converter, so that the real-time wind speed value reaches the preset target wind speed value; if the real-time wind speed value is smaller than the target wind speed value, the control terminal increases the exhaust air volume of the exhaust fan and the opening angle of the exhaust electric air volume adjusting valve, wherein the first exhaust fan is adjusted through an exhaust frequency converter, so that the real-time wind speed value reaches the preset target wind speed value;
the temperature measuring instrument monitors the real-time body temperature value of an experimenter and outputs a signal to the controller terminal, the control terminal compares the real-time body temperature value with a preset target body temperature value, and calculates and feeds back the signal to the first fresh air conditioner: if the real-time body temperature value of the experimenter is higher than the upper limit of the target body temperature value interval, the control terminal feeds back a cooling signal to the first fresh air conditioner, and the first fresh air conditioner starts a refrigeration mode, so that the body temperature of the experimenter is reduced to the target body temperature value interval; if the real-time body temperature value of the experimenter is lower than the lower limit of the target body temperature value interval, the control terminal feeds back a heating signal to the first fresh air conditioner, and the first fresh air conditioner starts a heating mode, so that the real-time body temperature value of the experimenter is increased to the target body temperature value interval;
the counter monitors the real-time number of the experimenters and outputs a signal to the control terminal, the control terminal compares the corresponding fresh air volume of the number of the real-time number of the experimenters with the number of different experimenters, and calculates and feeds back a signal to the air supply electric air volume adjusting valve of the first air supply pipeline and the air exhaust electric air volume adjusting valve of the first air exhaust pipeline: if the number of people increases in real time, the control terminal increases the opening angle of the air supply electric air volume adjusting valve and increases the opening angle of the air exhaust electric air volume adjusting valve; if the number of people is reduced in real time, the control terminal reduces the opening angle of the air supply electric air volume adjusting valve and reduces the opening angle of the air exhaust electric air volume adjusting valve.
8. The intelligent pressure balancing method for biosafety laboratories as claimed in claim 7, wherein the control terminal controls the opening and closing of the fresh air conditioner and the exhaust fan connected thereto according to the operation switch of the biosafety cabinet: if an operation switch of one biological safety cabinet is opened, the operation switch outputs a signal to a control terminal, the control terminal feeds back a signal to a fresh air conditioner and an exhaust fan which are connected with the biological safety cabinet, and the fresh air conditioner and the exhaust fan are sequentially opened; if the operation switch of one biosafety cabinet is closed, the operation switch outputs a signal to the control terminal, the control terminal feeds back a signal to the fresh air conditioner and the exhaust fan which are connected with the biosafety cabinet, and the exhaust fan and the fresh air conditioner are sequentially closed.
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| CN202110572213.1A CN113357730A (en) | 2021-05-25 | 2021-05-25 | Intelligent pressure balancing system and pressure balancing method for biosafety laboratory |
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| CN202110572213.1A CN113357730A (en) | 2021-05-25 | 2021-05-25 | Intelligent pressure balancing system and pressure balancing method for biosafety laboratory |
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Application publication date: 20210907 |