Ventilation air conditioner on-duty energy-saving operation control system for high-grade biosafety laboratory
The flexible operation mode switching control system solves the problem of high energy consumption in high-level biosafety laboratories, achieving energy reduction while ensuring biosafety, and providing a safe and economical operation solution.
Patent Information
- Application Number
- CN202423237313.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-27
AI Technical Summary
The high standards of air filtration and ventilation required for high-level biosafety laboratories lead to high energy consumption and waste, and existing technologies are unable to achieve energy conservation and consumption reduction while ensuring biosafety.
A flexible operating mode switching control system is adopted. Through the combination of backup units of the air supply and exhaust systems, variable air volume valves and airtight valves, the laboratory can achieve precise control in different modes, ensuring biosafety and directional airflow, while reducing energy consumption during non-experimental periods.
While meeting biosafety standards, this solution significantly reduces energy consumption during periods of non-essential use, achieving energy-saving effects and providing a safe and economical operating solution.
Smart Images
Figure CN223623065U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system. Background Technology
[0002] The air exchange rate and cleanliness requirements for high-level biosafety laboratories are designed to ensure air quality within the laboratory, maintaining the environmental control necessary for biosafety. According to GB50346-2011, "Technical Specification for Biosafety Laboratory Buildings," these requirements have clearly defined 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 building designs or experimental needs, improve safety, and extend the service life of air filters in critical equipment such as exhaust HEPA filters and biosafety cabinets. While these high standards are crucial for ensuring laboratory safety and efficiency, they also lead to high energy consumption, high operating costs, and unnecessary energy waste. To effectively reduce operating costs, avoid energy waste, and ensure biosafety, this invention aims to research and explore a more convenient and effective shift-based energy-saving operation mode for the ventilation and air conditioning system of high-level biosafety laboratories through automatic control under current specifications and requirements. Utility Model Content
[0003] This invention relates to a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system. Through this flexible operation mode switching, the high-level biosafety laboratory can ensure biosafety while also achieving energy saving and consumption reduction, and improving energy utilization efficiency.
[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0005] A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system is 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 kept in an absolute negative pressure state; a certain pressure gradient is provided between adjacent rooms of the laboratory to ensure directional airflow direction; and the air supply duct is connected to the exhaust duct through a disinfection bypass pipe.
[0006] The air supply system has a first air supply fan and a second air supply fan installed in parallel, serving as backups for each other; the exhaust system has a first exhaust fan and a second exhaust fan installed in parallel, serving as backups for each other.
[0007] The air supply duct is equipped with a first biosafety shut-off valve at its inlet end, an air supply shut-off valve and an air supply variable volume valve are sequentially installed at the outlet end of the air supply duct, the exhaust duct is equipped with a second biosafety shut-off valve at its outlet end, the exhaust duct is equipped with an exhaust shut-off valve and an exhaust variable volume valve are sequentially installed at its inlet end, and a third biosafety shut-off valve is installed on the disinfection bypass pipe.
[0008] The high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system includes the following components: the first biosafety airtight valve, the second biosafety airtight valve, the third biosafety airtight valve, the supply air variable volume valve, the exhaust air variable volume valve, the supply air airtight valve, and the exhaust air airtight valve are respectively connected to the central control system. The central control system controls the air volume and static pressure of the supply and exhaust air. The central control system is also connected to the supply air system and the exhaust air system to control the air volume of the supply and exhaust air.
[0009] The high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system includes: a changing room, a forced shower room, a buffer room and a core work room arranged in sequence in the laboratory, and the rooms in the laboratory are connected by steel doors or airtight doors.
[0010] The beneficial effects of this invention are as follows: While meeting the current regulatory requirements for the construction and management of biosafety laboratories in my country, the system ensures, through precise automatic control, the maintenance of absolute negative pressure and pressure gradients between adjacent rooms in different operating modes, as well as reliable switching of supply and exhaust fan operating conditions. This guarantees directional airflow and biosafety. During experimental periods, the system operates at full load to ensure high standards of air quality and biosafety. During non-experimental periods, the system automatically switches to a duty mode, reducing the supply and exhaust air volume to meet the minimum safety standard for air changes, significantly reducing energy consumption. This flexible operating mode switching not only ensures that the laboratory meets stringent biosafety standards at all times but also achieves significant energy savings by reducing energy consumption during unnecessary periods, providing a safe and economical operating solution for high-level biosafety laboratories. Attached Figure Description
[0011] Figure 1 This is a structural diagram of the energy-saving operation control system for ventilation and air conditioning in a high-level biosafety laboratory.
[0012] Figure 2 A flowchart for the automatic control and commissioning of the ventilation and air conditioning duty energy-saving operation control system for a high-level biosafety laboratory.
[0013] Explanation of reference numerals in the attached diagram: 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 shut-off valve; 11-Second biosafety shut-off valve; 12-Third biosafety shut-off valve; 13-Variable air volume valve for air supply; 14-Variable air volume valve for exhaust; 15-Air supply shut-off valve; 16-Exhaust shut-off valve; 17-Changing room; 18-Forced shower room; 19-Buffer room; 20-Core working area. Detailed Implementation
[0014] like Figure 1 As shown, a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system is characterized by: an air supply system 1 connected to the laboratory via an air supply duct 7, wherein a first air supply fan 3 and a second air supply fan 4 are arranged in parallel within the air supply system 1, serving as backups for each other; the laboratory is connected to an exhaust system 2 via an exhaust duct 8, which maintains the laboratory under absolute negative pressure; a certain pressure gradient is provided between adjacent rooms in the laboratory to ensure directional airflow; a first exhaust fan 5 and a second exhaust fan 6 are arranged in parallel within the exhaust system 2, serving as backups for each other; the air supply duct 7 is connected to the exhaust duct 8 via a disinfection bypass pipe 9; the laboratory is sequentially equipped with a changing room 17, a forced shower room 18, a buffer room 19, and a core working room 20; and the rooms within the laboratory are connected by steel doors or airtight doors.
[0015] The air supply duct 7 is equipped with a first biosafety shut-off valve 10 at its inlet end, an air supply shut-off valve 15 and an air supply variable volume valve 13 in sequence at its outlet end, the exhaust duct 8 is equipped with a second biosafety shut-off valve 11 at its outlet end, and the exhaust duct 8 is equipped with an exhaust shut-off valve 16 and an exhaust variable volume valve 14 in sequence at its inlet end. The disinfection bypass pipe 9 is equipped with a third biosafety shut-off valve 12. The first biosafety shut-off valve 10, the second biosafety shut-off valve 11, the third biosafety shut-off valve 12, the air supply variable volume valve 13, the exhaust variable volume valve 14, the air supply shut-off valve 15, and the exhaust shut-off valve 16 are respectively connected to the central control system. 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 to control the air volume of the air supply and exhaust.
[0016] A control mode for a high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system, characterized in that:
[0017] Based on the laboratory's usage, the ventilation and air conditioning system is divided into two operating modes: working mode and on-call mode. The laboratory can automatically switch between working mode and on-call mode. The first biosafety shut-off valve 10 and the second biosafety shut-off valve 11 are always open, and the third biosafety shut-off valve 12 is always closed.
[0018] When the laboratory is in working mode, and personnel are conducting experiments or raising animals, the central control system will operate the air supply system 1 and exhaust system 2 at 100% air supply and exhaust volume to maintain a high air exchange rate. When no personnel are conducting experiments or raising animals, the system will switch from working mode to duty mode. The central control system will synchronously and slowly reduce the frequency of the air supply system 1 and exhaust system 2 to ensure that the static pressure of the air supply and exhaust in the laboratory decreases synchronously and slowly. The central control system will reduce the air supply volume in the laboratory to the air supply volume of the duty mode by adjusting the air supply variable volume valve 13, and the central control system will reduce the exhaust volume in the laboratory to the exhaust volume of the duty mode by adjusting the exhaust variable volume valve 14, thereby controlling the pressure in the laboratory and keeping it in an absolute negative pressure state.
[0019] When the laboratory switches from duty mode to working mode, the central control system synchronously and slowly increases 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 increases synchronously and slowly. The central control system increases the air supply volume in the laboratory to the air supply volume of the duty mode by adjusting the air supply variable volume valve 13, and increases the exhaust volume in the laboratory to the exhaust volume of the duty mode by adjusting the exhaust variable volume valve 14, thereby controlling the pressure in the laboratory and keeping it in an absolute negative pressure state at all times.
[0020] In the embodiments, as shown Figure 2 As shown, in the automatic control debugging state, when the duty mode is determined, the air volume is reduced to about 70% of that in the working mode. At the same time, it is also necessary to meet the requirements of purification level 7 and air exchange rate of 15 times. When switching from working mode to duty mode, the supply air system 1 and the exhaust air system 2 are used to reduce the supply air static pressure and exhaust air static pressure. At the same time, the air volume in the laboratory is slowly reduced to the air volume set in the duty mode through CAV (Constant Air Volume System). The room pressure is adjusted through VAV (Variable Air Volume System) to ensure that the room pressure value remains unchanged and the pressure gradient remains unchanged.
[0021] When switching from duty mode to working mode, the supply air static pressure and exhaust air static pressure are slowly increased using the air supply system 1 and the exhaust air system 2. At the same time, the air volume in the laboratory is slowly increased to the air volume set in the working mode through the CAV. The VAV adjusts the room pressure to ensure that the room pressure value remains unchanged and the pressure gradient remains unchanged.
[0022] When switching between working mode and on-call mode, the laboratory must meet biosafety requirements. In on-call mode, when switching between standby supply fan and exhaust fan, the laboratory must meet biosafety requirements.
[0023] The above embodiments are merely illustrative examples of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art can make simple changes or substitutions based on the above embodiments without departing from the technical concept of this utility model, but these changes will still fall within the scope of protection of this utility model.
Claims
1. A high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system, characterized in that: The air supply system (1) is connected to the laboratory through the air supply duct (7), and the laboratory is connected to the exhaust system (2) through the exhaust duct (8), and the laboratory is kept in an absolute negative pressure state. A certain pressure gradient is provided between adjacent rooms of the laboratory to ensure the direction of directional airflow. The air supply duct (7) is connected to the exhaust duct (8) through the disinfection bypass pipe (9). The air supply system (1) has a first air supply fan (3) and a second air supply fan (4) arranged in parallel, serving as backups for each other; the exhaust system (2) has a first exhaust fan (5) and a second exhaust fan (6) arranged in parallel, serving as backups for each other. The air supply duct (7) is provided with a first biosafety shut-off valve (10) at its inlet end, and an air supply shut-off valve (15) and an air supply variable volume valve (13) are provided sequentially at the outlet end of the air supply duct (7). The exhaust duct (8) is provided with a second biosafety shut-off valve (11) at its outlet end, and an exhaust shut-off valve (16) and an exhaust variable volume valve (14) are provided sequentially at the inlet end of the exhaust duct (8). The disinfection bypass pipe (9) is provided with a third biosafety shut-off valve (12).
2. The 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 shut-off valve (10), the second biosafety shut-off valve (11), the third biosafety shut-off valve (12), the air supply variable air volume valve (13), the exhaust variable air volume valve (14), the air supply shut-off valve (15), and the exhaust shut-off valve (16) are respectively connected to the central control system. 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) to control the air volume of the air supply and exhaust.
3. The high-level biosafety laboratory ventilation and air conditioning duty energy-saving operation control system as described in claim 1, characterized in that: The laboratory is equipped with a changing room (17), a forced shower room (18), a buffer room (19), and a core work room (20) in sequence. The rooms in the laboratory are connected by steel doors or airtight doors.