Combined air-conditioning purification system for biosafety laboratory

Abstract

The invention discloses a combined type air conditioner purification system for a biosafety laboratory, and belongs to the field of air conditioner purification systems.The combined type air conditioner purification system comprises an air treatment unit, a pressure gradient maintaining unit and a comprehensive control unit.The air treatment unit comprises a filtering module, a temperature treatment module and a humidity treatment module; the filtering module is used for filtering particle impurities, dust and pollen in air and removing microorganisms in the air, the temperature processing module is used for increasing or reducing the air temperature, the humidity processing module is used for increasing or reducing the air humidity, and the pressure gradient maintaining unit is composed of an air feeder and a return fan. The air feeder is used for feeding air into the area, and the return fan is used for pumping back and discharging the air in the area. According to the invention, micro pollutants such as microorganisms can be effectively removed, and self-adaptive adjustment can be carried out according to environmental conditions in different areas.

Description

Technical Field

[0001] The invention relates to the field of biological laboratory air conditioning purification systems, in particular to a combined air conditioning purification system for a biological safety laboratory. Background Art

[0002] A biosafety laboratory is a place for conducting experiments related to biohazards. It aims to protect the experimenters, the surrounding environment, and prevent public hazards caused by the leakage of pathogens. Usually, the laboratory is divided into clean area, buffer area, and contaminated area. The clean area is the best protected area in the biosafety laboratory, with basically no risk of biological contamination. It usually includes the clean side of offices, lounges, and locker rooms. The buffer area is located between the clean area and the contaminated area and is a transition area. The contaminated area is the core area for biohazard experiments and there are high concentrations of pathogenic microorganisms. The layout of the laboratory should be reasonable, with clear separations between different functional areas, and buffer areas between contaminated areas for isolation. The ventilation system should be designed according to the principle of gradually reducing pressure from the clean area to the contaminated area. Different levels of biosafety laboratories have different requirements for temperature and humidity. Appropriate temperature and humidity help maintain the normal operation of experimental equipment and prevent abnormal growth or mutation of microorganisms in an inappropriate temperature and humidity environment. At the same time, it also provides a comfortable working environment for experimenters. Biosafety laboratories have cleanliness requirements, and biosafety laboratories need to reach a certain cleanliness level;

[0003] When conducting various biological experiments, biosafety laboratories have strict requirements on the environment within the laboratory. On the one hand, the laboratory needs to maintain appropriate temperature and humidity to ensure the normal operation of experimental equipment and the stability of experimental samples; on the other hand, in order to prevent the spread of biohazardous substances and the invasion of external contaminants, the cleanliness of the laboratory, reasonable airflow organization and stable pressure gradient must be guaranteed. Traditional air-conditioning systems are difficult to meet these complex and strict requirements at the same time. The filtering capacity of ordinary air-conditioning systems is limited and cannot effectively remove microscopic pollutants such as microorganisms. In addition, there are deficiencies in the accuracy of temperature and humidity control, the rationality of airflow organization and the maintenance of pressure gradients, and they cannot make adaptive adjustments according to the environmental conditions in different areas. Summary of the invention

[0004] The purpose of the present invention is to provide a combined air-conditioning purification system for a biosafety laboratory, so as to solve the problem that the ordinary air-conditioning system mentioned in the above background technology has limited filtering capacity and cannot effectively remove micro pollutants such as microorganisms, and has deficiencies in the accuracy of temperature and humidity control, the rationality of air flow organization and the maintenance of pressure gradient, and cannot make adaptive adjustments according to the environmental conditions in different areas.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined air conditioning purification system for a biosafety laboratory, comprising an air handling unit, a pressure gradient maintaining unit, and an integrated control unit, wherein the air handling unit comprises a filter module, a temperature treatment module, and a humidity treatment module, wherein the filter module is used to filter particulate impurities, dust and pollen in the air, and remove microorganisms in the air, wherein the temperature treatment module is used to increase or decrease the air temperature, wherein the humidity treatment module is used to increase or decrease the air humidity, wherein the pressure gradient maintaining unit is composed of a supply fan and a return fan, wherein the supply fan is used to supply air into the area, and wherein the return fan is used to supply air to the area. Used to draw back and discharge the air in the area, the integrated control unit is composed of a temperature and humidity module, a cleanliness module, an air pressure module, and a controller. The temperature and humidity module is used to detect the temperature and humidity values ​​in the area, and feed the temperature and humidity values ​​back to the controller, and the controller adjusts the operation of the air handling unit according to the temperature and humidity values ​​in the area. The cleanliness module is used to monitor the dust particle concentration in the air in real time, and feed the dust particle concentration back to the controller, and the controller performs cleanliness analysis and processing according to the dust particle concentration. The air pressure module is used to monitor the air pressure value in the area in real time, and feed the air pressure value back to the controller, and the controller adjusts the operation of the pressure gradient maintenance unit according to the air pressure value.

[0006] Furthermore, the filtration module includes a primary filter, a medium filter and a high efficiency filter. The primary filter is made of a multi-layer non-woven fabric material and filters particles with a particle size greater than 5 μm. The medium filter is a bag structure and filters particles with a particle size of 1-5 μm. The high efficiency filter is composed of glass fiber filter paper and filters particles with a particle size greater than 0.3 μm.

[0007] Furthermore, the temperature processing module includes a cooling coil and a heating coil. The cooling coil reduces the air temperature through heat exchange, and the heating coil is an electric heating coil for increasing the air temperature after power is turned on.

[0008] Furthermore, the humidity processing module includes a humidifier and a dehumidifier, the humidifier is used to increase the humidity content of the air, and the dehumidifier is used to reduce the humidity content of the air.

[0009] Furthermore, the laboratory is provided with a clean area, a contaminated area and a transition area; the air handling unit, the pressure gradient maintaining unit and the integrated control unit are arranged in the clean area; and the air handling unit, the pressure gradient maintaining unit and the integrated control unit are also arranged in the contaminated area.

[0010] Furthermore, an electric guide plate is provided in the buffer zone, and the electric guide plate is used to guide the air in the clean zone to flow into the contaminated zone.

[0011] Furthermore, the controller is also used to adjust the angle between the electric guide plate and the horizontal direction.

[0012] Furthermore, the controller is used to receive data fed back from the temperature and humidity module, the cleanliness module, and the air pressure module, and perform corresponding analysis and processing on the temperature and humidity values, dust particle concentration, and air pressure values, and adjust the operating status of the air handling unit, the pressure gradient maintenance unit, and the electric guide plate according to the analysis results.

[0013] The controller can adjust the air handling unit to perform heating, cooling, humidification and dehumidification according to the temperature and humidity values ​​fed back by the temperature and humidity module. The controller can issue an alarm according to the dust particle concentration. The controller can adjust the pressure gradient maintenance unit according to the air pressure value to discharge or exhaust air in the area, thereby maintaining the laboratory within a reasonable pressure gradient range.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The clean area and the contaminated area of ​​the laboratory of the present invention are both equipped with an air handling unit, a pressure gradient maintaining unit, and a comprehensive control unit. The dust particle concentration can set a threshold value according to actual usage. When the real-time monitored dust particle concentration exceeds the threshold value, the controller in the corresponding area will issue an alarm to prompt the staff to replace or repair the filter module in time, so that the maintenance of the filter modules in different areas is more accurate and timely.

[0016] 2. The present invention can make a judgment on the air pressure value of the clean area. If the air pressure value of the clean area is higher than the maximum value of the normal range, the return fan of the clean area is activated to discharge excess air. If the air pressure value of the clean area is lower than the minimum value of the normal range, the supply fan of the clean area is activated to discharge air into the clean area. If the air pressure value of the clean area is within the normal range, the air pressure of the contaminated area is judged according to the air pressure of the clean area, and the air pressure values ​​of the clean area and the contaminated area are compared and analyzed. If the air pressure difference between the air pressure value of the clean area and the air pressure value of the contaminated area exceeds 15Pa, the supply fan in the contaminated area is adjusted to start and output air to the contaminated area until the air pressure difference between the two areas is within the normal range. If the air pressure difference between the air pressure value of the clean area and the air pressure value of the contaminated area is lower than 10Pa, the excess air is discharged through the return fan in the contaminated area, which is faster and more effective in maintaining the pressure gradient in the laboratory.

[0017] 3. An electric guide plate is installed in the buffer zone to guide the air in the clean area to the contaminated area. The controller is used to adjust the angle between the electric guide plate and the horizontal direction. When the blower in the contaminated area fails, the isolation door of the buffer zone can be opened and the electric guide plate can be enabled to make the angle between it and the horizontal direction 15 degrees, thereby guiding the air to flow from the clean area to the contaminated area in a predetermined direction, preventing air backflow, and thus helping to maintain the air pressure difference between different areas. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a laboratory area distribution diagram of an embodiment of the present invention.

[0019] Figure 2 The present invention is a composition diagram of a combined air conditioning purification system for a biosafety laboratory. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 and 2 As shown, the present invention provides a technical solution: a combined air conditioning purification system for a biosafety laboratory, comprising an air handling unit, a pressure gradient maintaining unit, and a comprehensive control unit, wherein the air handling unit comprises a filter module, a temperature processing module, and a humidity processing module;

[0022] The filtering module is used to filter particulate impurities, dust and pollen in the air, and remove microorganisms in the air. The temperature processing module is used to increase or decrease the air temperature. The humidity processing module is used to increase or decrease the air humidity. The pressure gradient maintaining unit is composed of a supply fan and a return fan. The supply fan is used to supply air into the area, and the return fan is used to draw back and discharge the air in the area. The integrated control unit is composed of a temperature and humidity module, a cleanliness module, an air pressure module, and a controller. The temperature and humidity module is used to detect the temperature and humidity values ​​in the area, and feed the temperature and humidity values ​​back to the controller, and the controller adjusts the operation of the air processing unit according to the temperature and humidity values ​​in the area. The cleanliness module is used to monitor the dust particle concentration in the air in real time, and feed the dust particle concentration back to the controller, and the controller performs cleanliness analysis and processing according to the dust particle concentration. The air pressure module is used to monitor the air pressure value in the area in real time, and feed the air pressure value back to the controller, and the controller adjusts the operation of the pressure gradient maintaining unit according to the air pressure value.

[0023] The controller is used to receive data fed back from the temperature and humidity module, the cleanliness module, and the air pressure module, and respectively analyze and process the temperature and humidity values, the dust particle concentration, and the air pressure value, and adjust the operation status of the air handling unit, the pressure gradient maintenance unit, and the electric guide plate according to the analysis results; the laboratory is provided with a clean area, a polluted area, and a transition area, the air handling unit, the pressure gradient maintenance unit, and the comprehensive control unit are arranged in the clean area, and the air handling unit, the pressure gradient maintenance unit, and the comprehensive control unit are also arranged in the polluted area;

[0024] The filtration module includes a primary filter, a medium filter and a high efficiency filter. The primary filter is made of multi-layer non-woven fabric material and filters particles with a particle size greater than 5 μm. The medium filter is a bag structure and filters particles with a particle size of 1-5 μm. The high efficiency filter is composed of glass fiber filter paper and filters particles with a particle size greater than 0.3 μm.

[0025] The temperature processing module includes a cooling coil and a heating coil. The cooling coil reduces the air temperature through heat exchange, and the heating coil is an electric heating coil used to increase the air temperature after power is turned on.

[0026] The humidity processing module includes a humidifier and a dehumidifier, wherein the humidifier is used to increase the humidity content of the air, and the dehumidifier is used to reduce the humidity content of the air;

[0027] When in use, the appropriate temperature of the laboratory is set between 18-26 degrees Celsius. When the ambient temperature is within this temperature range, no processing is performed. When the ambient temperature exceeds 26 degrees Celsius, a cooling instruction is generated, and the temperature in the corresponding area is reduced by the cooling coil until the temperature in the area is within the appropriate temperature range. When the ambient temperature is lower than 18 degrees Celsius, a heating instruction is generated, and the temperature in the corresponding area is increased by the electric heating coil until the temperature in the area is within the appropriate temperature range. The appropriate humidity of the laboratory is between 30% and 70%. When the ambient humidity exceeds 70%, a dehumidification instruction is generated, and the dehumidifier is adjusted to start, and the humidity in the corresponding area is reduced until the humidity in the area is within the appropriate humidity range. When the ambient humidity is lower than 30%, a humidification instruction is generated, and the humidifier is adjusted to start, and the humidity in the corresponding area is increased until the humidity in the area is within the appropriate humidity range.

[0028] The clean area and contaminated area of ​​the laboratory are equipped with air handling units, pressure gradient maintenance units, and integrated control units. The dust particle concentration can be set to a threshold value according to actual usage. When the real-time monitored dust particle concentration exceeds the threshold, the controller in the corresponding area will issue an alarm to prompt the staff to replace or repair the filter module in time, making the maintenance of filter modules in different areas more accurate and timely.

[0029] In order to prevent the biohazardous substances inside the laboratory from leaking into the external environment and the external contaminated air from entering the laboratory, it is necessary to establish and maintain a specific pressure gradient. The biosafety laboratory is set up according to the principle of gradually decreasing pressure from the clean area to the contaminated area. There is a pressure difference between adjacent areas. The pressure difference range can be set according to actual conditions. Taking 10-15Pa as an example, the air pressure in the clean area is between +10Pa and +30Pa relative to the outdoor atmospheric pressure. First, the air pressure value of the clean area is judged. If the air pressure value of the clean area is within the normal range, the air pressure of the contaminated area is judged based on the air pressure of the clean area, and the clean area and the contaminated area are separated. The air pressure values ​​of the clean area are compared and analyzed. If the air pressure difference between the clean area and the contaminated area exceeds 15Pa, the supply fan in the contaminated area is adjusted to start and output air to the contaminated area until the air pressure difference between the two areas is within the normal range. If the air pressure difference between the clean area and the contaminated area is lower than 10Pa, the excess air is discharged through the return fan in the contaminated area. If the air pressure value of the clean area is higher than the maximum value of the normal range, the return fan in the clean area is enabled to discharge excess air. If the air pressure value of the clean area is lower than the minimum value of the normal range, the supply fan in the clean area is enabled to discharge air into the clean area.

[0030] An electric guide plate is provided in the buffer zone, and the electric guide plate is used to guide the air in the clean zone to flow into the contaminated zone. The controller is also used to adjust the angle between the electric guide plate and the horizontal direction;

[0031] When in use, if the blower in the contaminated area fails, the isolation door of the buffer zone can be opened and the electric guide plate can be activated to make the angle with the horizontal direction 15 degrees, so as to guide the air in the predetermined direction, from the clean area to the contaminated area 1, which can prevent the air from flowing back and help maintain the air pressure difference in different areas.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined air conditioning purification system for a biosafety laboratory, characterized in that: The invention comprises an air handling unit, a pressure gradient maintaining unit and an integrated control unit. The air handling unit comprises a filter module, a temperature processing module and a humidity processing module. The filter module is used to filter particulate impurities, dust and pollen in the air and remove microorganisms in the air. The temperature processing module is used to increase or decrease the air temperature. The humidity processing module is used to increase or decrease the air humidity. The pressure gradient maintaining unit is composed of a supply fan and a return fan. The supply fan is used to supply air into the area. The return fan is used to draw back and discharge the air in the area. The integrated control unit is composed of a temperature and humidity module, a cleanliness module, an air pressure module and a controller. The temperature and humidity module is used to detect the temperature and humidity values ​​in the area and feed the temperature and humidity values ​​back to the controller. The controller adjusts the operation of the air handling unit according to the temperature and humidity values ​​in the area. The cleanliness module is used to monitor the dust particle concentration in the air in real time and feed the dust particle concentration back to the controller. The controller performs cleanliness analysis and processing according to the dust particle concentration. The air pressure module is used to monitor the air pressure value in the area in real time and feed the air pressure value back to the controller. The controller adjusts the operation of the pressure gradient maintaining unit according to the air pressure value.

2. A combined air conditioning purification system for a biosafety laboratory according to claim 1, characterized in that: The filtration module includes a primary filter, a medium filter and a high efficiency filter. The primary filter is made of multi-layer non-woven fabric material and filters particles with a particle size greater than 5 μm. The medium filter is a bag structure and filters particles with a particle size of 1-5 μm. The high efficiency filter is composed of glass fiber filter paper and filters particles with a particle size greater than 0.3 μm.

3. The combined air conditioning purification system for a biosafety laboratory according to claim 1, characterized in that: The temperature processing module includes a cooling coil and a heating coil. The cooling coil reduces the air temperature through heat exchange, and the heating coil is an electric heating coil used to increase the air temperature after power is turned on.

4. The combined air conditioning purification system for a biosafety laboratory according to claim 1, characterized in that: The humidity processing module includes a humidifier and a dehumidifier, the humidifier is used to increase the humidity content of the air, and the dehumidifier is used to reduce the humidity content of the air.

5. The combined air conditioning purification system for a biosafety laboratory according to claim 1, characterized in that: The laboratory is provided with a clean area, a contaminated area and a transition area. The air handling unit, the pressure gradient maintaining unit and the integrated control unit are arranged in the clean area, and the air handling unit, the pressure gradient maintaining unit and the integrated control unit are also arranged in the contaminated area.

6. A combined air conditioning purification system for a biosafety laboratory according to claim 5, characterized in that: An electric guide plate is arranged in the buffer zone, and the electric guide plate is used to guide the air in the clean zone to flow into the contaminated zone.

7. A combined air conditioning purification system for a biosafety laboratory according to claim 6, characterized in that: The controller is also used to adjust the angle between the electric guide plate and the horizontal direction.

8. The combined air conditioning purification system for a biosafety laboratory according to claim 7, characterized in that: The controller is used to receive data fed back from the temperature and humidity module, the cleanliness module, and the air pressure module, and respectively perform corresponding analysis and processing on the temperature and humidity values, dust particle concentration, and air pressure values, and adjust the operating status of the air handling unit, the pressure gradient maintenance unit, and the electric guide plate according to the analysis results.

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