High-grade biosafety laboratory ventilation air conditioner on-duty energy-saving operation control system and control mode

Abstract

The invention relates to a ventilation and air-conditioning on-duty energy-saving operation control system and a control mode for a high-grade biosafety laboratory, an air supply system is communicated with the laboratory through an air supply pipeline, the laboratory is communicated with an exhaust system through an exhaust pipeline, and the laboratory is in an absolute negative pressure state; a certain pressure gradient is arranged between every two adjacent rooms of the laboratory to guarantee the directional airflow direction, a first air feeder and a second air feeder are arranged in the air supply system side by side and are standby for each other, a first exhaust fan and a second exhaust fan are arranged in the exhaust system in parallel and are standby for each other, and a first biological safety closed valve is arranged at the inlet end of an air supply pipeline. An air supply closed valve and an air supply variable air volume valve are sequentially arranged at the outlet end of the air supply pipeline, a second biological safety closed valve is arranged at the outlet end of the air exhaust pipeline, and an air exhaust closed valve and an air exhaust variable air volume valve are sequentially arranged at the inlet end of the air exhaust pipeline. The energy consumption is optimized, and the biological safety in a laboratory is ensured.

Description

Technical Field

[0001] The invention relates to a ventilation and air conditioning on-duty energy-saving operation control system and a control mode for a high-level biosafety laboratory. Background Art

[0002] In recent years, with the gradual improvement of the construction of high-level biosafety laboratories in my country, both the scale and the number have been significantly improved. Generally speaking, these high-level biosafety laboratories are usually affiliated with public scientific research institutions such as universities, hospitals, and research institutes. Energy conservation and carbon reduction are not only of great significance to environmental protection, improving operational efficiency and reducing costs, but also an important way for public scientific research institutions to fulfill their social responsibilities and promote scientific and technological innovation. Therefore, the focus of future work should include optimizing the energy management of laboratories while maintaining biosafety standards, in order to respond to the country's energy-saving policies, achieve green transformation, and achieve the goal of energy conservation and carbon reduction. Compared with the international advanced level, my country started late in the construction and standardization of biosafety laboratories. Therefore, in the early stage of construction, considering my country's national conditions, its standards and specifications set relatively strict requirements for the laboratory's ventilation and air-conditioning system and indoor environmental parameters. This high standard ensures the safety performance of the laboratory, but also leads to relatively high operating costs of high-level biosafety laboratories. However, with years of operating practice, my country's high-level biosafety laboratories have accumulated rich operating experience. At the same time, with the continuous revision of relevant specifications and standards such as laboratory construction management, policy support has been provided for the efficient and sustainable use of laboratory energy. These developments have provided a solid foundation for my country's high-level biosafety laboratories to reduce operating costs while ensuring laboratory biosafety.

[0003] The ventilation frequency and cleanliness requirements of high-level biosafety laboratories are to ensure the air quality in the laboratory to maintain the environmental control required for biosafety. According to GB50346-2011 "Technical Specifications for Biosafety Laboratory Buildings", these requirements have clear minimum standards. However, in actual engineering design and operation, high-level biosafety laboratories often need to far exceed these minimum requirements to adapt to specific architectural designs or experimental requirements to improve safety and extend the service life of air filters of key equipment such as exhaust high-efficiency filters and biosafety cabinets. Although these high standards are crucial to ensuring the safety and efficiency of laboratories, they also lead to problems such as high laboratory energy consumption, high operating costs and unnecessary energy waste. In order to effectively reduce operating costs, avoid energy waste, and ensure biosafety at the same time, the present invention aims to study and explore a more convenient and effective on-duty energy-saving operation mode for ventilation and air-conditioning systems in high-level biosafety laboratories through automatic control under current specifications and requirements. Summary of the invention

[0004] The present invention is a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system and control mode. Through this flexible operation mode switching, the high-level biosafety laboratory can achieve energy saving and consumption reduction and improve energy utilization efficiency while ensuring biosafety.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system, characterized in that: the air supply system is connected to the laboratory through an air supply duct, the laboratory is connected to the exhaust system through an exhaust duct, and the laboratory is in an absolute negative pressure state, a certain pressure gradient is set between adjacent rooms of the laboratory to ensure a directional airflow direction, and the air supply duct is connected to the exhaust duct through a disinfection bypass pipe;

[0007] The air supply system is provided with a first air supply fan and a second air supply fan in parallel, serving as a backup for each other; the air exhaust system is provided with a first exhaust fan and a second exhaust fan in parallel, serving as a backup for each other;

[0008] A first biosafety closed valve is arranged at the inlet end of the air supply duct, an air supply closed valve and an air supply variable air volume valve are arranged in sequence at the outlet end of the air supply duct, a second biosafety closed valve is arranged at the outlet end of the exhaust duct, an exhaust closed valve and an exhaust variable air volume valve are arranged in sequence at the inlet end of the exhaust duct, and a third biosafety closed valve is arranged on the disinfection bypass pipe.

[0009] The high-level biosafety laboratory ventilation and air-conditioning on-duty energy-saving operation control system, wherein: the first biosafety closed valve, the second biosafety closed valve, the third biosafety closed valve, the supply air variable air volume valve, the exhaust air variable air volume valve, the supply air closed valve and the exhaust air closed valve are respectively connected to the central control system signal, the central control system controls the air volume and static pressure of the supply and exhaust air, and the central control system is also connected to the air supply system and the exhaust system signal to control the air volume of the supply and exhaust air.

[0010] The high-level biosafety laboratory ventilation and air-conditioning duty energy-saving operation control system, wherein: the laboratory is provided with a dressing room, a compulsory shower room, a buffer room and a core workroom in sequence, and the rooms in the laboratory are connected by steel doors or airtight doors.

[0011] A control mode of a ventilation and air conditioning duty energy-saving operation control system for a high-level biosafety laboratory, characterized by:

[0012] According to the use of the laboratory, the ventilation and air conditioning system is divided into two operation modes, namely working mode and duty mode. The laboratory can automatically switch between working mode and duty mode. The first biosafety airtight valve and the second biosafety airtight valve are always in the open state, and the third biosafety airtight valve is always in the closed state;

[0013] When the laboratory is in working mode and there are people conducting experiments or raising animals in the laboratory, the central control system will operate the air supply system and the exhaust system at 100% of the air supply and exhaust volume to maintain a high ventilation rate. When there are no people conducting experiments or raising animals in the laboratory, the working mode is switched to the duty mode, and the central control system will synchronously and slowly reduce the frequencies of the air supply system and the exhaust system to ensure that the static pressure of the air supply and exhaust in the laboratory is synchronously and slowly reduced. The central control system reduces the air supply volume in the laboratory to the air supply volume in the duty mode by adjusting the air supply variable air volume valve, and reduces the exhaust volume in the laboratory to the exhaust volume in the duty mode by adjusting the exhaust variable air volume valve, thereby controlling the pressure in the laboratory so that it is always in an absolute negative pressure state;

[0014] When the laboratory switches from the duty mode to the working mode, the central control system will synchronously and slowly increase the frequencies of the air supply system and the exhaust system to ensure that the static pressures of the air supply and exhaust in the laboratory will increase synchronously and slowly. The central control system will increase the supply air volume in the laboratory to the supply air volume in the duty mode by adjusting the supply air variable air volume valve. The central control system will increase the exhaust air volume in the laboratory to the exhaust air volume in the duty mode by adjusting the exhaust air variable air volume valve, thereby controlling the pressure in the laboratory so that it is always in a state of absolute negative pressure.

[0015] The beneficial effects of the present invention are as follows: while meeting the current regulatory requirements for the construction and management of biosafety laboratories in my country, the system can ensure the maintenance of the absolute negative pressure state of the laboratory and the pressure gradient between adjacent rooms under different operating modes through precise automatic control, as well as reliable switching of supply and exhaust fan working conditions, thereby ensuring directional airflow and biosafety. During the experimental period, the system operates at full load to ensure high standards of air quality and biosafety; and during the non-experimental period, the system automatically switches to the duty mode, reducing the supply and exhaust air volume to the ventilation frequency that meets the minimum safety standard, significantly reducing energy consumption. This flexible operating mode switching not only ensures that the laboratory meets strict biosafety standards at all times, but also achieves significant energy-saving effects by reducing energy consumption during non-essential periods, providing a safe and economical operating solution for high-level biosafety laboratories. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the structural diagram of the ventilation and air conditioning on-duty energy-saving operation control system for high-level biosafety laboratories.

[0017] Figure 2 This is a flow chart for the automatic debugging of the ventilation and air conditioning on-duty energy-saving operation control system for high-level biosafety laboratories.

[0018] Explanation of the reference numerals: 1-air supply system; 2-exhaust system; 3-first air supply fan; 4-second air supply fan; 5-first exhaust fan; 6-second exhaust fan; 7-air supply duct; 8-exhaust duct; 9-disinfection bypass pipe; 10-first biosafety closed valve; 11-second biosafety closed valve; 12-third biosafety closed valve; 13-supply variable air volume valve; 14-exhaust variable air volume valve; 15-supply closed valve; 16-exhaust closed valve; 17-changing room; 18-compulsory shower room; 19-buffer room; 20-core workroom. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system is characterized in that: the air supply system 1 is connected to the laboratory through the air supply duct 7, the first air supply fan 3 and the second air supply fan 4 are arranged in parallel in the air supply system 1, and they are used as backup for each other, the laboratory is connected to the exhaust system 2 through the exhaust duct 8, and the laboratory is in an absolute negative pressure state, a certain pressure gradient is set between adjacent rooms in the laboratory to ensure the directional air flow direction, and the first exhaust fan 5 and the second exhaust fan 6 are arranged in parallel in the exhaust system 2, and they are used as backup for each other. The air supply duct 7 is connected to the exhaust duct 8 through the disinfection bypass pipe 9, and the dressing room 17, the forced shower room 18, the buffer room 19 and the core workroom 20 are arranged in sequence in the laboratory, and the rooms in the laboratory are connected through steel doors or airtight doors.

[0020] A first biosafety closed valve 10 is arranged at the inlet end of the air supply duct 7, an air supply closed valve 15 and an air supply variable air volume valve 13 are arranged in sequence at the outlet end of the air supply duct 7, a second biosafety closed valve 11 is arranged at the outlet end of the exhaust duct 8, an exhaust closed valve 16 and an exhaust variable air volume valve 14 are arranged in sequence at the inlet end of the exhaust duct 8, a third biosafety closed valve 12 is arranged on the disinfection bypass pipe 9, the first biosafety closed valve 10, the second biosafety closed valve 11, the third biosafety closed valve 12, the air supply variable air volume valve 13, the exhaust variable air volume valve 14, the air supply closed valve 15 and the exhaust closed valve 16 are respectively connected to the central control system signal, the central control system controls the air volume and static pressure of the supply and exhaust air, and the central control system is also connected to the air supply system 1 and the exhaust system 2 signal to control the air volume of the supply and exhaust air.

[0021] A control mode of a ventilation and air conditioning duty energy-saving operation control system for a high-level biosafety laboratory, characterized by:

[0022] According to the use of the laboratory, the ventilation and air conditioning system is divided into two operation modes, namely working mode and duty mode. The laboratory can automatically switch between the working mode and the duty mode. The first biosafety airtight valve 10 and the second biosafety airtight valve 11 are always in the open state, and the third biosafety airtight valve 12 is always in the closed state;

[0023] When the laboratory is in working mode and there are personnel conducting experiments or raising animals in the laboratory, the central control system will operate the air supply system 1 and the exhaust system 2 at 100% of the supply and exhaust air volume to maintain a high ventilation rate. When there are no personnel conducting experiments or raising animals in the laboratory, the working mode is switched to the duty mode, and the central control system will synchronously and slowly reduce the frequencies of the air supply system 1 and the exhaust system 2 to ensure that the static pressure of the air supply and exhaust in the laboratory is synchronously and slowly reduced. The central control system reduces the air supply volume in the laboratory to the air supply volume in the duty mode by adjusting the air supply variable air volume valve 13, and reduces the exhaust volume in the laboratory to the exhaust volume in the duty mode by adjusting the exhaust variable air volume valve 14, thereby controlling the pressure in the laboratory so that it is always in an absolute negative pressure state;

[0024] When the laboratory switches from the duty mode to the working mode, the central control system will synchronously and slowly increase the frequencies of the air supply system 1 and the exhaust system 2 to ensure that the static pressures of the supply and exhaust air in the laboratory will increase synchronously and slowly. The central control system will increase the supply air volume in the laboratory to the supply air volume in the duty mode by adjusting the supply air variable air volume valve 13. The central control system will increase the exhaust air volume in the laboratory to the exhaust air volume in the duty mode by adjusting the exhaust air variable air volume valve 14, thereby controlling the pressure in the laboratory so that it is always in an absolute negative pressure state.

[0025] In the embodiment Figure 2 As shown, in the automatic debugging state, when the duty mode is determined, the air volume is reduced to about 70% of that in the working mode, and at the same time, the requirements of purification level 7 and ventilation frequency 15 times are met. The working mode is switched to the duty mode, and the air supply system 1 and the exhaust system 2 are used to reduce the static pressure of the supply air and the static pressure of the exhaust air. At the same time, the air volume in the laboratory is slowly reduced to the air volume set in the duty mode through the CAV (Constant Air Volume) system, and the room pressure is adjusted through the VAV (Variable Air Volume System) to ensure that the room pressure value is controlled unchanged and the pressure gradient remains unchanged.

[0026] When the duty mode switches to the working mode, the air supply system 1 and the exhaust system 2 are used to slowly increase the supply air static pressure and the exhaust air static pressure. At the same time, the air volume in the laboratory is slowly increased to the air volume set in the working mode through CAV, and VAV adjusts the room pressure to ensure that the room pressure value is kept unchanged and the pressure gradient remains unchanged.

[0027] When testing the switching between working mode and duty mode, the laboratory must comply with biosafety requirements. In duty mode, the standby supply fan and exhaust fan switch between each other, and the laboratory must comply with biosafety requirements.

[0028] The above embodiments are merely examples of the present invention and are not intended to limit the protection scope of the present invention. Those skilled in the art may make simple changes or substitutions based on the above embodiments without departing from the technical concept of the present invention, but they still fall within the protection scope of the present invention.

Claims

1. A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system, characterized by: The air supply system (1) is connected to the laboratory through an air supply duct (7), and the laboratory is connected to the exhaust system (2) through an exhaust duct (8), and the laboratory is placed in an absolute negative pressure state. A certain pressure gradient is provided between adjacent rooms in the laboratory to ensure a directional airflow direction. The air supply duct (7) is connected to the exhaust duct (8) through a disinfection bypass pipe (9); The air supply system (1) is provided with a first air supply fan (3) and a second air supply fan (4) in parallel, serving as a backup for each other; the air exhaust system (2) is provided with a first exhaust fan (5) and a second exhaust fan (6) in parallel, serving as a backup for each other; A first biosafety airtight valve (10) is arranged at the inlet end of the air supply duct (7), an air supply airtight valve (15) and an air supply variable air volume valve (13) are arranged in sequence at the outlet end of the air supply duct (7), a second biosafety airtight valve (11) is arranged at the outlet end of the air exhaust duct (8), an exhaust airtight valve (16) and an exhaust variable air volume valve (14) are arranged in sequence at the inlet end of the air exhaust duct (8), and a third biosafety airtight valve (12) is arranged on the disinfection bypass pipe (9).

2. A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system as described in claim 1, characterized in that: The first biosafety sealed valve (10), the second biosafety sealed valve (11), the third biosafety sealed valve (12), the air supply variable air volume valve (13), the exhaust variable air volume valve (14), the air supply sealed valve (15) and the exhaust sealed valve (16) are respectively connected to the central control system signal. The central control system controls the air volume and static pressure of the air supply and exhaust. The central control system is also connected to the air supply system (1) and the exhaust system (2) signal to control the air volume of the air supply and exhaust.

3. A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system as claimed in claim 1, characterized in that: The laboratory is provided with a dressing room (17), a compulsory shower room (18), a buffer room (19) and a core workroom (20) in sequence, and the rooms in the laboratory are connected by steel doors or airtight doors.

4. A control mode of a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system, characterized by: According to the use of the laboratory, the ventilation and air conditioning system is divided into two operation modes, namely, working mode and duty mode. The laboratory can automatically switch between the working mode and the duty mode. The first biosafety airtight valve (10) and the second biosafety airtight valve (11) are always in an open state, and the third biosafety airtight valve (12) is always in a closed state. When the laboratory is in working mode and there are people conducting experiments or raising animals in the laboratory, the central control system will operate the air supply system (1) and the exhaust system (2) at 100% of the supply and exhaust air volume to maintain a high ventilation rate. When there are no people conducting experiments or raising animals in the laboratory, the working mode is switched to the duty mode, and the central control system will synchronously and slowly reduce the frequency of the air supply system (1) and the exhaust system (2) to ensure that the static pressure of the air supply and exhaust in the laboratory is synchronously and slowly reduced. The central control system reduces the air supply volume in the laboratory to the air supply volume in the duty mode by adjusting the air supply variable air volume valve (13). The central control system reduces the exhaust volume in the laboratory to the exhaust volume in the duty mode by adjusting the exhaust variable air volume valve (14), thereby controlling the pressure in the laboratory so that it is always in an absolute negative pressure state. When the laboratory switches from the duty mode to the working mode, the central control system will synchronously and slowly increase the frequencies of the air supply system (1) and the exhaust system (2) to ensure that the static pressure of the air supply and exhaust in the laboratory increases synchronously and slowly. The central control system increases the air supply volume in the laboratory to the air supply volume in the duty mode by adjusting the air supply variable air volume valve (13). The central control system increases the air exhaust volume in the laboratory to the air exhaust volume in the duty mode by adjusting the exhaust variable air volume valve (14), thereby controlling the pressure in the laboratory so that it is always in an absolute negative pressure state.

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