CN113000077A - Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory - Google Patents

Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory Download PDF

Info

Publication number
CN113000077A
CN113000077A CN202110102156.0A CN202110102156A CN113000077A CN 113000077 A CN113000077 A CN 113000077A CN 202110102156 A CN202110102156 A CN 202110102156A CN 113000077 A CN113000077 A CN 113000077A
Authority
CN
China
Prior art keywords
air inlet
delta
rotating speed
fan
adjusting
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.)
Granted
Application number
CN202110102156.0A
Other languages
Chinese (zh)
Other versions
CN113000077B (en
Inventor
陈必奎
何建发
钟杭
黄嘉希
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN202110102156.0A priority Critical patent/CN113000077B/en
Publication of CN113000077A publication Critical patent/CN113000077A/en
Application granted granted Critical
Publication of CN113000077B publication Critical patent/CN113000077B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • 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
    • B01L1/02—Air-pressure chambers; Air-locks therefor
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Health & Medical Sciences (AREA)
  • Clinical Laboratory Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The present disclosure provides a negative pressure control method, an air treatment device and a biological safety protection three-level laboratory, wherein the negative pressure control method comprises: controlling the rotating speed n of the air inlet fan, and adjusting the air inlet static pressure P to a target air inlet static pressure P'; adjusting the rotating speed N of an exhaust fan according to the difference value delta Q between the actually measured air inlet quantity Q and the target air inlet quantity Q'; adjusting the rotating speed n of the air inlet fan according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P'; and controlling the exhaust fan and the intake fan to be unchanged according to the current rotating speed until the delta Q is equal to 0 and the delta P is equal to 0. According to the negative pressure control method, the sizes of the air inlet volume and the air outlet volume of the air treatment equipment can be adjusted through alternate circulation, other parameters of the experiment chamber are kept unchanged, and the negative pressure fluctuation is maintained within an allowable range, so that the accurate adjustment of the negative pressure in the experiment chamber is realized.

Description

Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory
Technical Field
The disclosure belongs to the technical field of air conditioning, and particularly relates to a negative pressure control method, air treatment equipment and a biological safety protection three-level laboratory.
Background
The biological safety protection tertiary laboratory is a mobile protective device developed aiming at epidemic situation prevention and control and other emergent public events, and has great significance. The whole experiment cabin is completely sealed, and the inside of the cabin is in a negative pressure state, so that the gas in the experiment cabin cannot leak to the outside to cause pollution. The development of an outdoor refrigeration host and an indoor air supply unit (collectively called experimental cabin air treatment equipment) needs to meet specific requirements for accurately controlling the temperature, humidity, pressure, cleanliness and the like of an experimental cabin.
The control of the pressure in the cabin has specific requirements, the regulation of the temperature and the pressure in the cabin is matched with the actual requirements along with the change of the actual operation environment conditions, negative pressure is realized by the exhaust air volume being larger than the intake air volume in a ventilation system of the experiment cabin, and the exhaust air volume is regulated by frequency conversion to ensure that the negative pressure fluctuation is not more than 5 Pa. However, when the negative pressure in the experiment chamber needs to be adjusted, the difference between the air exhaust volume and the air intake volume needs to be controlled in real time, and the temperature, the pressure, the air exchange times and the like in the experiment chamber need to be controlled in real time, so that the air intake volume needs to be changed in real time, and the contradiction exists between the pressure control in the experiment chamber and the air intake volume needs controlled by other parameters, and the negative pressure cannot be adjusted independently under the condition of maintaining other parameters.
Disclosure of Invention
Therefore, the technical problem to be solved by the present disclosure is that the negative pressure in the chamber cannot be independently adjusted while maintaining other parameters of the experimental chamber, thereby providing a negative pressure control method, an air treatment device and a biological safety protection three-level laboratory.
In order to solve the above problem, the present disclosure provides a negative pressure control method including:
controlling the rotating speed n of the air inlet fan, and adjusting the air inlet static pressure P to a target air inlet static pressure P';
adjusting the rotating speed N of an exhaust fan according to the difference value delta Q between the actually measured air inlet quantity Q and the target air inlet quantity Q';
adjusting the rotating speed n of the air inlet fan according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P';
and controlling the exhaust fan and the intake fan to be unchanged according to the current rotating speed until the delta Q is equal to 0 and the delta P is equal to 0.
In some embodiments, the negative pressure control method comprises: and the step of adjusting the rotating speed N of the exhaust fan according to the difference value delta Q between the actually measured air inlet quantity Q and the target air inlet quantity Q ', and the step of adjusting the rotating speed N of the air inlet fan according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P', wherein the steps are alternately and circularly executed until the difference value delta Q is 0 and the difference value delta P is 0.
In some embodiments, the step of adjusting the rotation speed N of the exhaust fan according to the difference Δ Q between the measured intake air quantity Q and the target intake air quantity Q' includes:
when the delta Q is larger than 0, adjusting the rotating speed N of the exhaust fan to be N-delta N;
when the delta Q is equal to 0, the rotating speed N of the exhaust fan is adjusted to be unchanged;
when the delta Q is less than 0, adjusting the rotating speed N of the exhaust fan to be N + delta N;
wherein the content of the first and second substances,
Figure BDA0002916380070000021
in some embodiments, the step of adjusting the rotation speed n of the air intake fan according to the difference Δ P between the measured air intake static pressure P and the target air intake static pressure P', includes:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan to be n + delta n;
wherein the content of the first and second substances,
Figure BDA0002916380070000022
a negative pressure control method comprising:
controlling the rotating speed n of the air inlet fan, and adjusting the air inlet static pressure P to a target air inlet static pressure P';
adjusting the rotating speed N of the exhaust fan according to the difference value delta Pi between the pressure Pi in the actual measurement cabin and the pressure Pi 'in the target cabin, namely Pi-Pi';
adjusting the rotating speed n of the air inlet fan according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P';
and controlling the exhaust fan and the intake fan to be unchanged according to the current rotating speed until the delta Pi is 0 and the delta P is 0.
In some embodiments, the step of adjusting the rotation speed N of the exhaust fan according to the difference Δ Pi between the measured cabin pressure Pi and the target cabin pressure Pi ', and the step of adjusting the rotation speed N of the intake fan according to the difference Δ P between the measured intake static pressure P and the target intake static pressure P', are alternately and cyclically performed until Δ Pi is 0 and Δ P is 0.
In some embodiments, the step of adjusting the rotation speed N of the exhaust fan according to the difference Δ Pi between the measured cabin pressure Pi and the target cabin pressure Pi ', which is Pi-Pi', includes:
when the delta Pi is larger than 0, adjusting the rotating speed N of the exhaust fan to be N-delta N;
when the delta Pi is 0, the rotating speed N of the exhaust fan is adjusted to be unchanged;
when the delta Pi is less than 0, adjusting the rotating speed N of the exhaust fan to be N + delta N;
wherein the content of the first and second substances,
Figure BDA0002916380070000031
in some embodiments, the step of adjusting the rotation speed n of the air intake fan according to the difference Δ P between the measured air intake static pressure P and the target air intake static pressure P', includes:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan to be n + delta n;
wherein the content of the first and second substances,
Figure BDA0002916380070000032
an air treatment device adopts the negative pressure control method.
The purpose of the present disclosure and the technical problems solved thereby can be further achieved by the following technical measures.
In some embodiments, the method comprises: the experimental chamber is provided with an air inlet pipe and an exhaust pipe, the air inlet pipe is provided with an air inlet fan, and the air inlet fan is configured to be capable of adjusting the rotating speed according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P'; the exhaust pipe is provided with an exhaust fan, and the exhaust fan is configured to be capable of adjusting the rotating speed according to the difference value delta Q between the actually measured intake air quantity Q and the target intake air quantity Q 'and/or according to the difference value delta Pi between the pressure Pi in the actually measured cabin and the pressure Pi' in the target cabin.
In some embodiments, the air processing equipment further comprises an equipment inner unit, the equipment inner unit is provided with a fresh air inlet and a fresh air outlet, the fresh air inlet is communicated with the outdoor environment, and the fresh air outlet is communicated with the air inlet pipe.
In some embodiments, an air treatment apparatus includes a first circulation system, a second circulation system.
In some embodiments, the first circulation system and the second circulation system each comprise a compressor, a four-way valve, an outdoor heat exchanger, an indoor heat exchanger and a throttling device.
In some embodiments, a filter, and/or a heat exchange assembly, and/or a heating device, and/or a humidifying device, and/or a fan assembly are arranged in the equipment.
In some embodiments, when the indoor unit of the apparatus includes the heat exchange assembly, the heat exchange assembly is composed of the indoor heat exchanger of the first circulation system and the indoor heat exchanger of the second circulation system, and the two indoor heat exchangers are arranged along the flow direction of the fresh air.
In some embodiments, the air processing equipment further comprises a controller, a pressure sensor is arranged in the experiment chamber, and the controller is electrically connected with the air inlet fan, the air exhaust fan and the pressure sensor respectively.
A biological safety protection three-level laboratory adopts the negative pressure control method or the air treatment equipment.
The negative pressure control method, the air treatment equipment and the biological safety protection three-level laboratory provided by the disclosure have at least the following beneficial effects:
according to the negative pressure control method, the sizes of the air inlet volume and the air outlet volume of the air treatment equipment can be adjusted through alternate circulation, other parameters of the experiment chamber are kept unchanged, and the negative pressure fluctuation is maintained within an allowable range, so that the accurate adjustment of the negative pressure in the experiment chamber is realized.
Drawings
FIG. 1 is a schematic diagram of an experimental chamber structure and negative pressure control according to an embodiment of the disclosure;
FIG. 2 is a schematic structural view of an air treatment device according to an embodiment of the present disclosure;
FIG. 3 is a schematic structural view of a heat exchange assembly according to an embodiment of the disclosure;
FIG. 4 is a schematic diagram of a circulation system of an air treatment device according to an embodiment of the disclosure.
The reference numerals are represented as:
1. an air intake fan; 2. an exhaust fan; 3. an experiment cabin; 4. an air inlet pipe; 5. an exhaust duct; 6. an equipment internal machine; 7. a fresh air inlet; 8. a fresh air outlet; 9. a first circulation system; 10. a second circulation system; 11. a compressor; 12. a four-way valve; 13. an outdoor heat exchanger; 14. an indoor heat exchanger; 15. a throttling device; 16. a filter; 17. a heat exchange assembly; 18. a heating device; 19. a humidifying device; 20. a fan assembly; 21. a controller; 22. a pressure sensor; 23. a tracheal thermometer bulb; 24. an exhaust temperature sensing bulb; 25. a high voltage switch; 26. a high pressure sensor; 27. an environmental temperature sensing bulb; 28. a liquid tube temperature sensing bulb; 29. defrosting and warming bags; 30. a gas-suction temperature sensing bulb; 31. a heating low-voltage switch; 32. an outdoor fan; 33. a gas-liquid separator; 34. a refrigeration low-voltage switch.
Detailed Description
To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
Referring to fig. 1 to 4, the present embodiment provides a negative pressure control method, including:
when the temperature T, the air exhaust quantity, the air exchange times and other parameters in the experiment chamber 3 all reach preset targets, and the negative pressure in the experiment chamber 3 needs to be adjusted, the variable pressure difference control is realized by adjusting the rotating speed of the air inlet fan 1 and the rotating speed of the air exhaust fan 2 of the air treatment equipment, and the negative pressure in the experiment chamber 3 is accurately controlled under the condition that other parameters are not changed.
S101, controlling the rotating speed n of the air inlet fan 1, and adjusting the air inlet static pressure P to a target air inlet static pressure P'.
And S102, adjusting the rotating speed N of the exhaust fan 2 according to the difference value delta Q between the actually measured intake air quantity Q and the target intake air quantity Q ', which is Q-Q'.
The change of the air outlet static pressure is caused by adjusting the rotating speed N of the air exhaust fan 2, the negative pressure in the experiment chamber 3 can be influenced, and the control of the negative pressure in the experiment chamber 3 is realized.
In some embodiments, the step of adjusting the rotation speed N of the exhaust fan 2 according to the difference Δ Q between the measured intake air quantity Q and the target intake air quantity Q', includes:
when the delta Q is larger than 0, adjusting the rotating speed N of the exhaust fan 2 to be N-delta N;
when the delta Q is equal to 0, the rotating speed N of the exhaust fan 2 is adjusted to be unchanged;
when the delta Q is less than 0, adjusting the rotating speed N of the exhaust fan 2 to be N + delta N;
wherein the content of the first and second substances,
Figure BDA0002916380070000051
therefore, the adjustment of the rotating speed N of the exhaust fan 2 is positive and negative delta N each time, because the rotating speed N of the exhaust fan 2 is adjusted, and the negative pressure change in the experiment chamber 3 is inevitably caused because the intake fan 1 is not adjusted, but the negative pressure fluctuation in the experiment chamber 3 cannot exceed a specific range according to the design requirement of the experiment chamber 3. The adjustment quantity of the rotating speed of the exhaust fan 2 is positive and negative delta N every time, so that the negative pressure fluctuation can be controlled.
When the rotating speed N of the exhaust fan 2 is adjusted, the negative pressure in the experiment chamber 3 is changed, the air supply quantity Q in the experiment chamber 3 needs to be close to the target air supply quantity Q', and the air inlet static pressure is changed in the same direction.
S103, adjusting the rotating speed n of the air inlet fan 1 according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P ', which is equal to P-P'.
The change of the air inlet quantity is caused by adjusting the rotating speed n of the air inlet fan 1, the negative pressure in the experiment chamber 3 can be influenced, and the control of the negative pressure in the experiment chamber 3 is realized.
In some embodiments, the step of adjusting the rotation speed n of the air intake fan 1 according to the difference Δ P between the measured air intake static pressure P and the target air intake static pressure P', includes:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan 1 to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan 1 is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan 1 to be n + delta n;
wherein the content of the first and second substances,
Figure BDA0002916380070000052
therefore, the adjustment of the rotating speed n of the air inlet fan 1 is positive and negative delta n every time, and the rotating speed of the air inlet fan 1 is positive and negative delta n every time, so that the negative pressure fluctuation can be controlled.
And S104, controlling the exhaust fan 2 and the intake fan 1 to be unchanged according to the current rotating speed until the delta Q is equal to 0 and the delta P is equal to 0.
After the rotating speed N of the air inlet fan 1 is adjusted according to the step S103, the air inlet static pressure changes in the same direction, so that the negative pressure in the experiment chamber 3 changes, the target air inlet volume Q' is synchronously updated, the rotating speed N of the air exhaust fan 2 is adjusted according to the step S102, the air exhaust volume changes synchronously, if the air inlet static pressure changes again after adjustment, the rotating speed N of the air inlet fan 1 is adjusted again according to the step S103, the air inlet static pressure continues to be adjusted, the operation is sequentially performed, and the operation is kept unchanged according to the current rotating speed until Δ Q is equal to 0 and Δ P is equal to 0, so that the experiment chamber 3 can be adjusted to the preset negative pressure and stably maintained at the target negative pressure.
The negative pressure control method can adjust the air inlet volume and the air outlet volume of the air treatment equipment through alternate circulation, execute variable pressure difference control, keep other parameters of the experiment chamber 3 unchanged, and realize accurate adjustment of the negative pressure in the experiment chamber 3 under the condition that the negative pressure fluctuation is maintained within an allowable range.
Another embodiment of the present disclosure discloses a negative pressure control method, including:
when the parameters of temperature T, negative pressure, exhaust air volume, air exchange times and the like in the experiment chamber 3 reach preset targets, under the condition that the pressure Pi in the experiment chamber 3 needs to be regulated, the constant pressure difference control is realized by regulating the rotating speed of the air inlet fan 1 and the rotating speed of the air exhaust fan 2 of the air treatment equipment, and under the condition that other target parameters are kept unchanged, the pressure Pi in the experiment chamber 3 is accurately controlled.
S201, controlling the rotating speed n of the air inlet fan 1, and adjusting the air inlet static pressure P to a target air inlet static pressure P'.
S202 adjusts the rotation speed N of the exhaust fan 2 based on the difference Δ Pi between the measured cabin pressure Pi and the target cabin pressure Pi ', which is Pi-Pi'.
The change of the air outlet static pressure caused by adjusting the rotating speed N of the air exhaust fan 2 can influence the pressure Pi in the experiment chamber 3, thereby realizing the control of the negative pressure in the experiment chamber 3.
In some embodiments, the step of adjusting the rotation speed N of the exhaust fan 2 according to the difference Δ Pi between the measured cabin pressure Pi and the target cabin pressure Pi ', which is Pi-Pi', includes:
when the delta Pi is larger than 0, adjusting the rotating speed N of the exhaust fan 2 to be N-delta N;
when the Δ Pi is equal to 0, the rotation speed N of the exhaust fan 2 is adjusted to be unchanged;
when the delta Pi is less than 0, adjusting the rotating speed N of the exhaust fan 2 to be N + delta N;
wherein the content of the first and second substances,
Figure BDA0002916380070000061
therefore, the adjustment of the rotating speed N of the exhaust fan 2 is positive and negative delta N each time, because the rotating speed N of the exhaust fan 2 is adjusted, and the air intake fan 1 is not adjusted, the pressure Pi and the negative pressure in the experiment chamber 3 are inevitably changed, but the negative pressure fluctuation in the experiment chamber 3 cannot exceed a specific range according to the design requirement of the experiment chamber 3. The adjustment quantity of the rotating speed of the exhaust fan 2 is positive and negative delta N every time, so that the pressure and negative pressure fluctuation can be controlled.
After the rotating speed N of the exhaust fan 2 is adjusted, the negative pressure in the experiment chamber 3 is far away from the target value, and the target intake static pressure needs to be changed in the same direction.
S203, adjusting the rotating speed n of the air inlet fan 1 according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P ', which is equal to P-P'.
The change of the air inlet quantity is caused by adjusting the rotating speed n of the air inlet fan 1, the pressure Pi in the experiment chamber 3 can be influenced, and the control of the pressure Pi in the experiment chamber 3 is realized.
In some embodiments, the step of adjusting the rotation speed n of the air intake fan 1 according to the difference Δ P between the measured air intake static pressure P and the target air intake static pressure P', includes:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan 1 to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan 1 is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan 1 to be n + delta n;
wherein the content of the first and second substances,
Figure BDA0002916380070000071
therefore, the adjustment of the rotating speed n of the air inlet fan 1 is positive and negative delta n every time, and the rotating speed of the air inlet fan 1 is positive and negative delta n every time, so that the negative pressure fluctuation can be controlled.
And S204, controlling the exhaust fan 2 and the intake fan 1 to be unchanged according to the current rotating speed until the delta Pi is 0 and the delta P is 0.
After the rotation speed N of the air intake fan 1 is changed in the same direction according to the step S203, the pressure Pi in the experiment chamber 3 is changed, the rotation speed N of the air exhaust fan 2 is adjusted according to the step S202, the negative pressure in the experiment chamber 3 is adjusted, if the air intake static pressure is changed, the rotation speed N of the air intake fan 1 is adjusted again according to the step S203, the air intake static pressure is continuously adjusted, the operation is sequentially repeated until Δ Pi is equal to 0 and Δ P is equal to 0, and the operation is kept unchanged according to the current rotation speed, so that the experiment chamber 3 can be adjusted to the preset pressure and stably maintained at the target pressure.
The negative pressure control method can adjust the air inlet volume and the air outlet volume of the air treatment equipment through alternate circulation, execute constant pressure difference control, keep other parameters of the experiment chamber 3 unchanged, and realize accurate adjustment of the pressure in the experiment chamber 3 under the condition that the negative pressure fluctuation is maintained within an allowable range.
With reference to fig. 1-4, the present embodiment further discloses an air treatment device, which adopts the above-mentioned negative pressure control method.
In some embodiments, the method comprises: the experimental chamber 3 is provided with an air inlet pipe 4 and an exhaust pipe 5, the air inlet pipe 4 is provided with an air inlet fan 1, and the air inlet fan 1 is configured to be capable of adjusting the rotating speed according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P'; the exhaust pipe 5 is provided with an exhaust fan 2, and the exhaust fan 2 is configured to be capable of adjusting the rotation speed according to the difference value delta Q between the actually measured intake air quantity Q and the target intake air quantity Q 'and/or according to the difference value delta Pi between the actually measured pressure Pi in the cabin and the target pressure Pi' in the cabin.
The air treatment equipment of the embodiment can realize constant pressure difference control and variable pressure difference control of the pressure in the experiment chamber 3 by controlling the rotating speeds of the exhaust fan 2 and the air inlet fan 1, keep other parameters of the experiment chamber 3 unchanged, and maintain pressure fluctuation within a range.
In some embodiments, the air processing equipment further comprises an equipment inner unit 6, the equipment inner unit 6 is provided with a fresh air inlet 7 and a fresh air outlet 8, the fresh air inlet 7 is communicated with the outdoor environment, and the fresh air outlet 8 is communicated with the air inlet pipe 4.
The equipment internal unit 6 of the embodiment is used for supplying fresh air meeting the temperature and humidity to the experiment chamber 3, and realizing accurate control of the pressure of the experiment chamber 3.
In some embodiments, the air treatment device comprises a first circulation system 9, a second circulation system 10, based on reliability considerations. The first circulation system 9 and the second circulation system 10 are designed in a combined manner, so that the control of one use and one standby can be realized, and the air treatment function can be continuously provided for the experiment chamber 3. Meanwhile, under extreme conditions, the air purifier can be started simultaneously, and the air treatment effect with high speed and high performance is realized.
In some embodiments, the first circulation system 9 and the second circulation system 10 each include a compressor 11, a four-way valve 12, an outdoor heat exchanger 13, an indoor heat exchanger 14, and a throttling device 15, the compressor 11 is a variable frequency two-stage compressor 11, a suction port of the compressor 11 is connected to an S port of the four-way valve 12 through a gas-liquid separator 33, a heating low-pressure switch 31 and a cooling low-pressure switch 34 are disposed between the compressor 11 and the gas-liquid separator 33, a suction temperature sensing bulb 30 is disposed between the gas-liquid separator 33 and the four-way valve 12, an E port of the four-way valve 12 is connected to the indoor heat exchanger 14 through a gas pipe, a gas pipe temperature sensing bulb 23 is disposed on the gas pipe, the indoor heat exchanger 14 is connected to the outdoor heat exchanger 13 through a liquid pipe, a liquid pipe temperature sensing bulb 28, the throttling device 15 and a refrigerant, the outdoor heat exchanger 13 is connected to the port C of the four-way valve 12, the exhaust port of the compressor 11 is connected to the port D of the four-way valve 12, and an exhaust temperature sensing bulb 24, a high-voltage switch 25, and a high-voltage sensor 26 are provided between the compressor 11 and the four-way valve 12. Thus, the air treatment equipment of the embodiment can carry out refrigeration and heating treatment on the fresh air of the experiment cabin 3.
In some embodiments, a filter 16 is arranged in the equipment indoor unit 6, so that the entering fresh air can be filtered, and impurities in the fresh air can be prevented from polluting the inside of the experiment chamber 3; and/or the heat exchange assembly 17, the heat exchange assembly 17 carries on refrigeration and heat treatment to the new trend; and/or the heating device 18, the heating device 18 plays a role of auxiliary heating, and the temperature of the fresh air is increased; and/or a humidifying device 19, wherein the humidifying device 19 can improve the humidity of fresh air; and/or fan assembly 20, fan assembly 20 can control the business turn over wind volume and the wind speed of new trend.
In some embodiments, when the indoor unit 6 includes the heat exchange assembly 17, the heat exchange assembly 17 is formed by the indoor heat exchanger 14 of the first circulation system 9 and the indoor heat exchanger 14 of the second circulation system 10, and the two indoor heat exchangers 14 are arranged along the flow direction of the fresh air. The design of the double-chamber internal heat exchanger 14 can realize the reliability guarantee of one-use and one-standby, and can also realize the simultaneous operation of the two machines, thereby improving the refrigeration or heating performance of the heat exchange assembly 17.
In some embodiments, the air processing apparatus further comprises a controller 21, a pressure sensor 22 is disposed in the experiment chamber 3, and the controller 21 is electrically connected to the intake fan 1, the exhaust fan 2, and the pressure sensor 22, respectively. The pressure sensor 22 can detect the air pressure in the experiment chamber 3, so that the controller 21 can conveniently control the rotating speed of the air inlet fan 1 and the air outlet fan.
A biological safety protection three-level laboratory adopts the negative pressure control method or the air treatment equipment.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents and modifications that come within the spirit and scope of the disclosure are desired to be protected. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present disclosure, and these improvements and modifications should also be considered as the protection scope of the present disclosure.

Claims (17)

1. A negative pressure control method, characterized by comprising:
controlling the rotating speed n of the air inlet fan (1) and adjusting the air inlet static pressure P to a target air inlet static pressure P';
adjusting the rotating speed N of the exhaust fan (2) according to the difference value delta Q between the actually measured air inlet quantity Q and the target air inlet quantity Q';
adjusting the rotating speed n of the air inlet fan (1) according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P';
and controlling the exhaust fan (2) and the intake fan (1) to operate according to the current rotating speed until the delta Q is 0 and the delta P is 0.
2. The negative pressure control method according to claim 1, wherein in the negative pressure control method: and the step of adjusting the rotating speed N of the exhaust fan (2) according to the difference value delta Q between the actually measured air inlet quantity Q and the target air inlet quantity Q ', and the step of adjusting the rotating speed N of the air inlet fan (1) according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P', are alternately and circularly executed until the difference value delta Q is 0 and the difference value delta P is 0.
3. The negative pressure control method according to claim 1 or 2, wherein the step of adjusting the rotation speed N of the exhaust fan (2) according to the difference Δ Q between the measured intake air quantity Q and the target intake air quantity Q' comprises:
when the delta Q is larger than 0, adjusting the rotating speed N of the exhaust fan (2) to be N-delta N;
when the delta Q is equal to 0, the rotating speed N of the exhaust fan (2) is adjusted to be unchanged;
when the delta Q is less than 0, adjusting the rotating speed N of the exhaust fan (2) to be N + delta N;
wherein the content of the first and second substances,
Figure FDA0002916380060000011
4. the negative pressure control method according to claim 1 or 2, wherein the step of adjusting the rotation speed n of the air intake fan (1) according to the difference Δ P between the measured air intake static pressure P and the target air intake static pressure P ', which is P-P', comprises:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan (1) to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan (1) is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan (1) to be n + delta n;
wherein the content of the first and second substances,
Figure FDA0002916380060000012
5. a negative pressure control method, characterized by comprising:
controlling the rotating speed n of the air inlet fan (1) and adjusting the air inlet static pressure P to a target air inlet static pressure P';
adjusting the rotating speed N of the exhaust fan (2) according to the difference value delta Pi between the pressure Pi in the actual measurement cabin and the pressure Pi 'in the target cabin, namely Pi-Pi';
adjusting the rotating speed n of the air inlet fan (1) according to the difference value delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P';
and controlling the exhaust fan (2) and the intake fan (1) to operate according to the current rotating speed until the delta Pi is 0 and the delta P is 0.
6. The negative pressure control method according to claim 5, wherein the step of adjusting the rotation speed N of the exhaust fan (2) based on the difference Δ Pi between the measured cabin pressure Pi and the target cabin pressure Pi 'being Pi-Pi', and the step of adjusting the rotation speed N of the intake fan (1) based on the difference Δ P between the measured intake static pressure P and the target intake static pressure P 'being P-P' are alternately and cyclically performed until Δ Pi is 0 and Δ P is 0.
7. The negative pressure control method according to claim 5 or 6, wherein the step of adjusting the rotation speed N of the exhaust fan (2) based on the difference Δ Pi ═ Pi-Pi 'between the measured cabin pressure Pi and the target cabin pressure Pi', comprises:
when the delta Pi is larger than 0, adjusting the rotating speed N of the exhaust fan (2) to be N-delta N;
when the delta Pi is 0, the rotating speed N of the exhaust fan (2) is adjusted to be unchanged;
when the delta Pi is less than 0, adjusting the rotating speed N of the exhaust fan (2) to be N + delta N;
wherein the content of the first and second substances,
Figure FDA0002916380060000021
8. the negative pressure control method according to claim 5 or 6, wherein the step of adjusting the rotation speed n of the air intake fan (1) according to the difference value Δ P between the measured air intake static pressure P and the target air intake static pressure P ', which is P-P', comprises the steps of:
when the delta P is larger than 0, adjusting the rotating speed n of the air inlet fan (1) to be n-delta n;
when the delta P is equal to 0, the rotating speed n of the air inlet fan (1) is adjusted to be unchanged;
when the delta P is less than 0, adjusting the rotating speed n of the air inlet fan (1) to be n + delta n;
wherein the content of the first and second substances,
Figure FDA0002916380060000022
9. an air treatment apparatus, characterized in that the negative pressure control method according to any one of claims 1-8 is used.
10. An air treatment device according to claim 9, comprising: the experimental chamber (3) is provided with an air inlet pipe (4) and an exhaust pipe (5), the air inlet pipe (4) is provided with an air inlet fan (1), and the air inlet fan (1) is configured to be capable of adjusting the rotating speed according to the difference delta P between the actually measured air inlet static pressure P and the target air inlet static pressure P'; the exhaust fan (2) is arranged on the exhaust pipe (5), and the exhaust fan (2) is configured to be capable of adjusting the rotating speed according to the difference value delta Q between the actually measured intake air quantity Q and the target intake air quantity Q 'and/or according to the difference value delta Pi between the pressure Pi in the actually measured cabin and the pressure Pi' in the target cabin.
11. The air treatment equipment according to claim 10, further comprising an equipment inner machine (6), wherein the equipment inner machine (6) is provided with a fresh air inlet (7) and a fresh air outlet (8), the fresh air inlet (7) is communicated with the outside, and the fresh air outlet (8) is communicated with the air inlet pipe (4).
12. An air treatment device according to claim 11, characterized in that it comprises a first circulation system (9), a second circulation system (10).
13. Air treatment apparatus according to claim 12, wherein the first circulation system (9) and the second circulation system (10) each comprise a compressor (11), a four-way valve (12), an outdoor heat exchanger (13), an indoor heat exchanger (14), and a throttling device (15).
14. Air treatment equipment according to claim 12, characterized in that inside the equipment inner unit (6) there is arranged a filter (16), and/or a heat exchange assembly (17), and/or a heating device (18), and/or a humidifying device (19), and/or a fan assembly (20).
15. Air treatment apparatus according to claim 14, characterized in that when the in-apparatus unit (6) comprises a heat exchange assembly (17), the heat exchange assembly (17) is formed by an indoor heat exchanger (14) of the first circulation system (9) and an indoor heat exchanger (14) of the second circulation system (10), both indoor heat exchangers (14) being arranged in the direction of flow of fresh air.
16. The air treatment equipment according to any one of claims 10 to 15, further comprising a controller (21), wherein a pressure sensor (22) is arranged in the experiment chamber (3), and the controller (21) is electrically connected with the air intake fan (1), the air exhaust fan (2) and the pressure sensor (22) respectively.
17. A biosafety tertiary laboratory, characterized in that a negative pressure control method according to any one of claims 1 to 8 or an air treatment device according to any one of claims 10 to 16 is used.
CN202110102156.0A 2021-01-26 2021-01-26 Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory Active CN113000077B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110102156.0A CN113000077B (en) 2021-01-26 2021-01-26 Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110102156.0A CN113000077B (en) 2021-01-26 2021-01-26 Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory

Publications (2)

Publication Number Publication Date
CN113000077A true CN113000077A (en) 2021-06-22
CN113000077B CN113000077B (en) 2022-09-30

Family

ID=76384643

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110102156.0A Active CN113000077B (en) 2021-01-26 2021-01-26 Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory

Country Status (1)

Country Link
CN (1) CN113000077B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061116A (en) * 2021-11-03 2022-02-18 青岛海尔空调器有限总公司 Method and device for controlling fresh air conditioner, fresh air conditioner and storage medium
CN115823716A (en) * 2022-11-25 2023-03-21 珠海格力电器股份有限公司 Indoor static pressure adjusting method and device, electronic equipment and storage medium

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103499124A (en) * 2013-10-18 2014-01-08 戴若夫 Method and system for purifying indoor fresh air
CN107559956A (en) * 2017-08-21 2018-01-09 广东美的暖通设备有限公司 VMC and its control method
CN207350692U (en) * 2017-04-19 2018-05-11 重庆哥尔摩科技有限公司 Based on the intelligent ventilating system in scientific experiment room
CN110186172A (en) * 2019-06-03 2019-08-30 西安锦威电子科技有限公司 Three-level and the above biosecurity laboratory environmental control system
CN110345659A (en) * 2019-07-29 2019-10-18 珠海格力电器股份有限公司 A kind of reheat dehumidification integration system cooling system and control method
CN110836431A (en) * 2018-08-17 2020-02-25 领凡新能源科技(北京)有限公司 Indoor ventilation system and control method thereof
CN111059703A (en) * 2019-12-04 2020-04-24 珠海格力电器股份有限公司 Air volume control method
KR102151091B1 (en) * 2020-04-03 2020-09-03 하민호 Sterilization system in negative pressure isolation room
CN212189147U (en) * 2020-05-09 2020-12-22 四川川净洁净技术股份有限公司 Integral full negative pressure laboratory

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103499124A (en) * 2013-10-18 2014-01-08 戴若夫 Method and system for purifying indoor fresh air
CN207350692U (en) * 2017-04-19 2018-05-11 重庆哥尔摩科技有限公司 Based on the intelligent ventilating system in scientific experiment room
CN107559956A (en) * 2017-08-21 2018-01-09 广东美的暖通设备有限公司 VMC and its control method
CN110836431A (en) * 2018-08-17 2020-02-25 领凡新能源科技(北京)有限公司 Indoor ventilation system and control method thereof
CN110186172A (en) * 2019-06-03 2019-08-30 西安锦威电子科技有限公司 Three-level and the above biosecurity laboratory environmental control system
CN110345659A (en) * 2019-07-29 2019-10-18 珠海格力电器股份有限公司 A kind of reheat dehumidification integration system cooling system and control method
CN111059703A (en) * 2019-12-04 2020-04-24 珠海格力电器股份有限公司 Air volume control method
KR102151091B1 (en) * 2020-04-03 2020-09-03 하민호 Sterilization system in negative pressure isolation room
CN212189147U (en) * 2020-05-09 2020-12-22 四川川净洁净技术股份有限公司 Integral full negative pressure laboratory

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114061116A (en) * 2021-11-03 2022-02-18 青岛海尔空调器有限总公司 Method and device for controlling fresh air conditioner, fresh air conditioner and storage medium
CN115823716A (en) * 2022-11-25 2023-03-21 珠海格力电器股份有限公司 Indoor static pressure adjusting method and device, electronic equipment and storage medium

Also Published As

Publication number Publication date
CN113000077B (en) 2022-09-30

Similar Documents

Publication Publication Date Title
CN113000077B (en) Negative pressure control method, air treatment equipment and biological safety protection three-level laboratory
JP5886463B1 (en) Air conditioner and operation method thereof
CN101865497B (en) High-accuracy energy-saving constant-temperature constant-moisture air conditioner and control method thereof
CN103807970B (en) The control method of air conditioner and device
JP5097852B1 (en) Air conditioning method and air conditioning apparatus
CN107143973B (en) A kind of control method of multi-connected machine underload refrigerating operaton
CN102425841A (en) Method for controlling machine room air conditioner based on variable frequency compressor
CN112660409B (en) Enthalpy difference control method of airplane ground air conditioning system
CN103822303B (en) A kind of accurate adjustable air conditioning system of energy-conservation many variable working condition gamut and control method thereof
CN201740131U (en) High-precision, energy-saving, constant-temperature and constant-humidity air-conditioner
CN109539384A (en) A kind of changeable air quantity fluorine pump energy saving air conditioner and its control method
US20200348087A1 (en) Furnace control systems and methods
CN110030777B (en) Control method for realizing optimal condensation pressure
CN205641256U (en) Heating and cooling air conditioner
CN208012134U (en) Full load air-conditioning device
CN103398419A (en) Novel high-precision constant temperature and constant humidity air conditioner
CN109253495A (en) Modular point of family air-conditioner set of one kind and control method
CN108548236A (en) A kind of integrated energy-saving type air conditioner
CN108387031A (en) A kind of heat pump system and control method
KR20120090272A (en) Ventilator and method for the smae
CN207335021U (en) A kind of engine testing room temperature and humidity control system
CN112696743A (en) Dehumidifier and control method thereof
CN105627502A (en) Direct-current variable-frequency all-fresh-air air conditioning unit
CN112984621B (en) Control method for exhaust superheat degree of parallel multi-split air conditioner
CN209197021U (en) A kind of explosion-proof type constant temperature and humidity machine

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
GR01 Patent grant
GR01 Patent grant