CN112484253A - Indoor pressure control method, device, controller and exhaust system - Google Patents
Indoor pressure control method, device, controller and exhaust system Download PDFInfo
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- CN112484253A CN112484253A CN202011325728.3A CN202011325728A CN112484253A CN 112484253 A CN112484253 A CN 112484253A CN 202011325728 A CN202011325728 A CN 202011325728A CN 112484253 A CN112484253 A CN 112484253A
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000008859 change Effects 0.000 claims abstract description 14
- 238000004134 energy conservation Methods 0.000 abstract description 4
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- 230000001276 controlling effect Effects 0.000 description 12
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- 230000006870 function Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
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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
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/46—Improving electric energy efficiency or saving
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
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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
- 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
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Abstract
The invention relates to a method, a device and a controller for controlling indoor pressure and an exhaust system, wherein the method for controlling the indoor pressure comprises the following steps: collecting indoor pressure information in real time; judging whether the indoor pressure is in a preset range or not according to the pressure information; when the pressure in the chamber is not in the preset range, the frequency of the exhaust fan is adjusted to change the exhaust amount so as to maintain the pressure in the chamber in the preset range. The invention changes the air exhaust amount by collecting the indoor pressure information and adjusting the frequency of the exhaust fan and the opening of the exhaust valve of the exhaust pipe when the indoor pressure is not in the preset range, so as to maintain the pressure gradient between the indoor and the adjacent room; the invention adopts the mode of adjusting the frequency of the fan to adjust the air quantity, avoids the energy loss on a pipeline when the air discharge quantity of the system is smaller, and is beneficial to realizing energy conservation.
Description
Technical Field
The invention relates to the technical field of indoor pressure control, in particular to a method, a device and a controller for controlling indoor pressure and an exhaust system.
Background
The biological safety laboratory has strict requirements on indoor temperature and humidity control, and needs to keep the indoor relative pressure of the biological safety laboratory constant to form a pressure gradient with an adjacent room so as to prevent air cross infection in different areas of the biological safety laboratory. The existing biological safety laboratory pressure difference control method adopts a variable air volume regulating valve to regulate the air supply volume and the air exhaust volume of a laboratory so as to maintain the pressure gradient. In the existing control method, the frequency of an exhaust fan is constant, and in order to keep the pressure of a ventilation system of a biological safety laboratory constant, the design is generally carried out according to the maximum exhaust air volume, but the system cannot run at the maximum exhaust air volume most of the time, the opening degree of an exhaust valve is small, so that the resistance of an air volume variable valve is too large, the energy waste of a pipeline is caused, and the energy consumption of the system is large.
Disclosure of Invention
In view of the above, the present invention provides a method, an apparatus, a controller and an exhaust system for controlling indoor pressure, which overcome the disadvantages of the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: a method of controlling indoor pressure, comprising:
collecting indoor pressure information in real time;
judging whether the indoor pressure is in a preset range or not according to the pressure information;
when the pressure in the chamber is not in the preset range, the frequency of the exhaust fan is adjusted to change the exhaust amount so as to maintain the pressure in the chamber in the preset range.
Further, the pressure information includes:
a pressure value within the chamber, or a differential pressure value between the chamber and a neighboring chamber.
Further, when the pressure in the chamber is not within the preset range, adjusting the frequency of the exhaust fan to change the exhaust amount includes:
if the pressure in the chamber is not in the preset range due to small pressure in the chamber, the frequency of the exhaust fan is increased to reduce the exhaust volume;
if the pressure in the chamber is not in the preset range due to the large pressure in the chamber, the frequency of the exhaust fan is adjusted to be low so as to increase the exhaust amount.
Further, while adjusting the frequency of the exhaust fan, the method also comprises the following steps:
the opening degree of an exhaust valve of an exhaust pipe of the adjacent room is adjusted so as to keep the exhaust volume of the adjacent room unchanged.
Further, adjust the exhaust valve aperture of the exhaust pipe who faces the room, include:
when the frequency of the exhaust fan is increased, the opening degree of an exhaust valve of an exhaust pipe of the adjacent chamber is increased;
when the frequency of the exhaust fan is adjusted to be low, the opening degree of an exhaust valve of an exhaust pipe adjacent to the room is reduced.
Furthermore, when the pressure in the room is in the preset range, the current frequency of the exhaust fan and the opening degree of the exhaust valve of the exhaust pipe adjacent to the room are kept unchanged.
The present invention also provides a control device for indoor pressure, comprising:
the pressure acquisition module is used for acquiring indoor pressure information in real time;
the judging module is used for judging whether the indoor pressure is in a preset range according to the pressure information;
and the frequency adjusting module is used for adjusting the frequency of the exhaust fan to change the exhaust amount when the indoor pressure is not in the preset range so as to maintain the indoor pressure in the preset range.
Further, the control device further includes:
and the exhaust valve opening adjusting module is used for adjusting the opening of an exhaust valve of an exhaust pipe of the adjacent chamber so as to keep the exhaust volume of the adjacent chamber unchanged.
The invention also provides a controller for executing the method for controlling the indoor pressure.
The present invention also provides an exhaust system comprising:
the exhaust fan, a plurality of exhaust pipes and the control device of the indoor pressure;
each exhaust pipe is arranged in one room and is connected with the exhaust fan; an exhaust valve is arranged on the exhaust pipe;
the exhaust fan and the exhaust valve are respectively electrically connected with the control device.
By adopting the technical scheme, the method for controlling the indoor pressure comprises the following steps: collecting indoor pressure information in real time; judging whether the indoor pressure is in a preset range or not according to the pressure information; when the pressure in the chamber is not in the preset range, the frequency of the exhaust fan is adjusted to change the exhaust amount so as to maintain the pressure in the chamber in the preset range. The invention changes the air exhaust amount by collecting the indoor pressure information and adjusting the frequency of the exhaust fan and the opening of the exhaust valve of the exhaust pipe when the indoor pressure is not in the preset range, so as to maintain the pressure gradient between the indoor and the adjacent room; the invention adopts the mode of adjusting the frequency of the fan to adjust the air quantity, avoids the energy loss on a pipeline when the air discharge quantity of the system is smaller, and is beneficial to realizing energy conservation.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart of an embodiment of a method for controlling indoor pressure according to the present invention;
FIG. 2 is a schematic flow chart of a second embodiment of the method for controlling indoor pressure according to the present invention;
fig. 3 is a schematic structural diagram provided by an embodiment of the indoor pressure control device of the present invention.
In the figure: 1. a pressure acquisition module; 2. a judgment module; 3. a frequency adjustment module; 4. and an opening adjusting module of the exhaust valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic flow chart of a method for controlling an indoor pressure according to an embodiment of the present invention.
As shown in fig. 1, the method for controlling an indoor pressure according to this embodiment includes:
s11: collecting indoor pressure information in real time;
s12: judging whether the indoor pressure is in a preset range or not according to the pressure information;
further, the pressure information includes:
a pressure value within the chamber, or a differential pressure value between the chamber and a neighboring chamber.
S13: when the pressure in the chamber is not in the preset range, the frequency of the exhaust fan is adjusted to change the exhaust amount so as to maintain the pressure in the chamber in the preset range.
Further, when the pressure in the chamber is not within the preset range, adjusting the frequency of the exhaust fan to change the exhaust amount includes:
if the pressure in the chamber is not in the preset range due to small pressure in the chamber, the frequency of the exhaust fan is increased to reduce the exhaust volume;
if the pressure in the chamber is not in the preset range due to the large pressure in the chamber, the frequency of the exhaust fan is adjusted to be low so as to increase the exhaust amount.
The indoor space in the invention refers to a biosafety laboratory or other spaces with pressure requirements.
The control method of the indoor pressure can be applied to an exhaust system, in actual use, an exhaust system is assumed to be composed of four small laboratories (biological safety laboratories), the four small laboratories are mutually independent and isolated, a clean corridor is shared, and the clean corridor keeps micro-positive pressure relative to the biological safety laboratories. The four small laboratories share one set of exhaust system and one exhaust fan, and each laboratory exhausts air and is provided with an air volume variable exhaust valve. The four small laboratories share one buffer room. The buffer room and the peripheral corridor are not directly communicated with the outside. Pressure difference sensors are arranged among the four small laboratories, the clean corridor, the buffer room and the peripheral corridor (pressure sensors can also be arranged in the four small laboratories, the clean corridor, the buffer room and the peripheral corridor). The pressure differential gradient is as follows: the pressure of the peripheral corridor is larger than the pressure of the buffer room, the pressure of the clean corridor (the pressure is kept slightly positive relative to the biological safety laboratory) is larger than the pressure of the laboratory, the pressure gradient between the laboratory and the clean corridor as well as between the buffer room and the peripheral corridor is constant, and the pressure difference signal of each room can be based on the pressure of the corridor.
When the pressure information is a differential pressure value, the preset range may be calculated according to the pressure of the corridor and a preset differential pressure value.
Fig. 2 is a schematic flow chart of a method for controlling indoor pressure according to a second embodiment of the present invention.
As shown in fig. 2, the method for controlling an indoor pressure according to this embodiment includes:
s21: acquiring the pressure difference value of the indoor relative adjacent room in real time;
still taking the application scenario described in the first embodiment as an example, the pressure difference gradient is as follows: the peripheral corridor is larger than the buffer room, larger than the clean corridor (keeping micro positive pressure relative to the biological safety laboratory) and larger than the laboratory, the pressure gradient is kept constant, and the pressure difference signal of each room is based on the pressure of the corridor.
S22: judging whether the indoor pressure is within a preset range according to the differential pressure value;
the pressure (target pressure) that the laboratory should keep can be calculated according to the micro-positive pressure value that the laboratory should keep relative corridor with the pressure of corridor as the standard, in practical application, keeps the pressure of laboratory in preset range (target pressure ± pressure error).
S23: when the pressure in the chamber is not in the preset range, adjusting the frequency of the exhaust fan to change the exhaust amount so as to maintain the pressure in the chamber in the preset range;
further, when the pressure in the chamber is not within the preset range, adjusting the frequency of the exhaust fan to change the exhaust amount includes:
if the pressure in the chamber is not in the preset range due to small pressure in the chamber, the frequency of the exhaust fan is increased to reduce the exhaust volume;
if the pressure in the chamber is not in the preset range due to the large pressure in the chamber, the frequency of the exhaust fan is adjusted to be low so as to increase the exhaust amount.
S24: adjusting the opening of an exhaust valve of an exhaust pipe of the adjacent room while adjusting the frequency of an exhaust fan so as to keep the exhaust volume of the adjacent room unchanged; executing steps S21-S24;
specifically, adjust the exhaust valve aperture of the exhaust pipe who faces the room, include:
when the frequency of the exhaust fan is increased, the opening degree of an exhaust valve of an exhaust pipe of the adjacent chamber is increased;
when the frequency of the exhaust fan is adjusted to be low, the opening degree of an exhaust valve of an exhaust pipe adjacent to the room is reduced.
S25: when the indoor pressure is in the preset range, the current exhaust fan frequency and the opening of the exhaust valve of the exhaust pipe adjacent to the room are kept unchanged.
In practical application, each small laboratory air supply section has constant air supply quantity. Four small laboratories share one set of exhaust system and one exhaust fan. Each laboratory is provided with an air exhaust valve with variable air volume. Pressure difference sensors may be provided in the four small laboratories, clean corridors, buffer rooms and peripheral corridors. When indoor pressure fluctuation occurs in a certain small laboratory, the exhaust volume is adjusted by adjusting the frequency of the exhaust fan, so that the indoor pressure of the small laboratory is controlled to be kept within a preset range. Meanwhile, in order to avoid the influence of the change of the frequency of the exhaust fan on other three small experiments without pressure fluctuation, the opening degree of the exhaust valves of the exhaust pipes of other laboratories is adjusted, so that the exhaust volume of the laboratories without pressure fluctuation is constant when the frequency of the exhaust fan changes, and the pressure gradient of the system is ensured to be constant.
Four little labs serial numbers 1, 2, 3 and 4, when pressure fluctuation appears in laboratory 1, if according to the pressure signal that differential pressure sensor gathered, judge 1 pressure increase in laboratory, increase the exhaust fan frequency this moment, make 1 total exhaust volume in laboratory grow. The exhaust fan frequency changes, has increased entire system's the volume of airing exhaust, because one set of exhaust system of four little labs sharing, in order to avoid laboratory 2, 3 and 4 volumes of airing exhaust to appear changing, through the exhaust valve of adjusting laboratory 2, 3 and 4 exhaust pipes, above-mentioned laboratory exhaust valve adopts variable air volume valve for laboratory 2, 3 and 4 volumes of airing exhaust are unchangeable, and laboratory 1 volume of airing exhaust increases, thereby maintains each laboratory pressure gradient invariable. Similarly, when it is determined that the pressure in laboratory 1 is decreasing, the blower frequency is decreased at this time, so that the total air discharge amount of laboratory 1 is small, and the air discharge valves of the air discharge pipes of laboratories 2, 3 and 4 are adjusted so that the air discharge amounts of laboratories 2, 3 and 4 are constant.
When the indoor pressure is in the preset range, the current exhaust fan frequency and the opening of the exhaust valve of the exhaust pipe are kept unchanged, and the pressure gradient of the exhaust system meets the design requirement.
The control method can quickly, effectively and accurately regulate the indoor pressure and reduce the influence caused by pressure fluctuation. The air quantity is adjusted by adjusting the frequency of the fan, so that the energy loss of the pipeline is reduced and the energy consumption of operation is reduced under the condition of effectively ensuring the pressure gradient. The purpose of energy conservation is achieved, and meanwhile, the safety of indoor researchers is guaranteed.
Fig. 3 is a schematic structural diagram provided by an embodiment of the indoor pressure control device of the present invention.
As shown in fig. 3, the indoor pressure control device according to this embodiment includes:
the pressure acquisition module 1 is used for acquiring indoor pressure information in real time;
the judging module 2 is used for judging whether the indoor pressure is in a preset range according to the pressure information;
and the frequency adjusting module 3 is used for adjusting the frequency of the exhaust fan to change the exhaust amount when the indoor pressure is not in the preset range so as to maintain the indoor pressure in the preset range.
Further, the method also comprises the following steps:
and the exhaust valve opening adjusting module 4 is used for adjusting the opening of an exhaust valve of an exhaust pipe of the adjacent chamber so as to keep the exhaust volume of the adjacent chamber unchanged.
The working principle of the control device for indoor pressure in this embodiment is the same as that of the control method for indoor pressure in any of the above embodiments, and details are not repeated here.
In the embodiment, indoor pressure information is acquired through the pressure acquisition module 1, and when the indoor pressure is not in a preset range, the exhaust volume is changed by adjusting the frequency of an exhaust fan and the opening of an exhaust valve of an exhaust pipe so as to maintain the pressure gradient between the indoor space and the adjacent space; in the embodiment, the control device adopts a mode of adjusting the frequency of the fan to adjust the air quantity, so that the energy loss on a pipeline is avoided when the air discharge quantity of the system is smaller, and the energy conservation is favorably realized.
The present invention also provides a controller for performing the method of controlling the pressure in the chamber as shown in fig. 1 or 2.
The present invention also provides an embodiment of an exhaust system, the exhaust system comprising:
an exhaust fan, a plurality of exhaust pipes and a control device of the indoor pressure as shown in figure 3;
each exhaust pipe is arranged in one room and is connected with the exhaust fan; an exhaust valve is arranged on the exhaust pipe;
the exhaust fan and the exhaust valve are respectively electrically connected with the control device.
The control device controls the exhaust fan and the exhaust valve according to the control method described in fig. 1 or fig. 2 to maintain the pressure gradient between the chamber and the adjacent chamber.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A method of controlling indoor pressure, comprising:
collecting indoor pressure information in real time;
judging whether the indoor pressure is in a preset range or not according to the pressure information;
when the pressure in the chamber is not in the preset range, the frequency of the exhaust fan is adjusted to change the exhaust amount so as to maintain the pressure in the chamber in the preset range.
2. The control method according to claim 1, wherein the pressure information includes:
a pressure value within the chamber, or a differential pressure value between the chamber and a neighboring chamber.
3. The control method of claim 1, wherein adjusting the frequency of the exhaust fan to change the amount of exhaust air when the pressure in the chamber is not within a preset range comprises:
if the pressure in the chamber is not in the preset range due to small pressure in the chamber, the frequency of the exhaust fan is increased to reduce the exhaust volume;
if the pressure in the chamber is not in the preset range due to the large pressure in the chamber, the frequency of the exhaust fan is adjusted to be low so as to increase the exhaust amount.
4. The control method of claim 1, further comprising, while adjusting the exhaust fan frequency:
the opening degree of an exhaust valve of an exhaust pipe of the adjacent room is adjusted so as to keep the exhaust volume of the adjacent room unchanged.
5. The control method according to claim 4, wherein the adjusting of the opening degree of the exhaust valve of the exhaust pipe of the adjacent chamber comprises:
when the frequency of the exhaust fan is increased, the opening degree of an exhaust valve of an exhaust pipe of the adjacent chamber is increased;
when the frequency of the exhaust fan is adjusted to be low, the opening degree of an exhaust valve of an exhaust pipe adjacent to the room is reduced.
6. The control method according to any one of claims 1 to 5,
when the indoor pressure is in the preset range, the current exhaust fan frequency and the opening of the exhaust valve of the exhaust pipe adjacent to the room are kept unchanged.
7. An apparatus for controlling indoor pressure, comprising:
the pressure acquisition module is used for acquiring indoor pressure information in real time;
the judging module is used for judging whether the indoor pressure is in a preset range according to the pressure information;
and the frequency adjusting module is used for adjusting the frequency of the exhaust fan to change the exhaust amount when the indoor pressure is not in the preset range so as to maintain the indoor pressure in the preset range.
8. The control device according to claim 7, characterized by further comprising:
and the exhaust valve opening adjusting module is used for adjusting the opening of an exhaust valve of an exhaust pipe of the adjacent chamber so as to keep the exhaust volume of the adjacent chamber unchanged.
9. A controller for performing the method of controlling the pressure in the chamber according to any one of claims 1 to 6.
10. An exhaust system, comprising:
an exhaust fan, a plurality of exhaust ducts, and a control device for the pressure in the chamber according to claim 7 or 8;
each exhaust pipe is arranged in one room and is connected with the exhaust fan; an exhaust valve is arranged on the exhaust pipe;
the exhaust fan and the exhaust valve are respectively electrically connected with the control device.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114353300A (en) * | 2021-12-08 | 2022-04-15 | 珠海格力电器股份有限公司 | Negative pressure control system and method for biosafety environmental control laboratory |
| 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 |
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| CN203550104U (en) * | 2013-09-16 | 2014-04-16 | 北京中建建筑设计院有限公司 | Centralized ventilation system with shared multiple ventilation cabinets for labs |
| CN205939544U (en) * | 2016-07-27 | 2017-02-08 | 南京诺丹工程技术有限公司 | Laboratory lingering remnants of past customs volume control system |
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| 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 |
| CN210801515U (en) * | 2019-08-09 | 2020-06-19 | 中冶南方工程技术有限公司 | Variable air volume air treatment system for laboratory |
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| CN114353300A (en) * | 2021-12-08 | 2022-04-15 | 珠海格力电器股份有限公司 | Negative pressure control system and method for biosafety environmental control laboratory |
| 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 |
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