Laboratory ventilation system

Abstract

The invention discloses a laboratory ventilation system, and belongs to the technical field of laboratory equipment. Comprising a biological safety cabinet ventilation system and a whole house ventilation system, the biological safety cabinet ventilation system comprises a cabinet body air inlet pipe, a cabinet body air outlet pipe, a cabinet body air inlet pump, a cabinet body air outlet pump and a filter box. The whole house ventilation system comprises an air inlet pipe, an air outlet pipe, an air inlet pump, an air outlet pump and a filtering assembly. According to the difference of ventilation air requirements of the specified area and the whole area, ventilation guiding and exhausting operation is carried out in a differentiated mode; the internal environment of the laboratory is ventilated and air is clean; and for the biosafety cabinet, the higher level of ventilation air is clean and sterile. The ventilation system solves the problems that although an existing ventilation system of a laboratory is respectively provided with a regional ventilation system and a whole-house ventilation system, only the discharge end is substantially distinguished, the two systems adopt the same guiding and discharging control system, the provided air quality is the same, and the ventilation system is possibly not suitable for the ventilation standard in a biological safety cabinet.

Description

Technical Field

[0001] The invention belongs to the technical field of laboratory equipment, and in particular relates to a laboratory ventilation system. Background Art

[0002] As an important place for scientific research and technological innovation, the laboratory has increasingly stringent environmental control requirements. The laboratory ventilation system is crucial to ensuring the stability of parameters such as air quality, temperature, and humidity in the laboratory, and is a key equipment to ensure a safe and comfortable experimental environment. The main function of the laboratory ventilation system is to remove harmful substances in the room through air exchange to ensure that the air quality in the laboratory meets safety standards. It can not only significantly reduce the risk of experimental personnel being exposed to harmful substances, but also control the temperature and humidity in the laboratory to create a comfortable environment for the laboratory.

[0003] The ventilation system of the laboratory is divided into local ventilation and whole-room ventilation; local ventilation is for designated areas, such as biological safety cabinets; whole-room ventilation is responsible for the air quality of the entire laboratory environment, responsible for introducing fresh air and removing dirty gases; currently in the laboratory ventilation system, there is a set of exhaust control system used by local ventilation and whole-room ventilation, but the air exhaust ports are set in designated areas and whole-room areas respectively; however, for the biological safety cabinet representing the designated area, the cleanliness requirement of the air introduced into it may be higher than the cleanliness requirement of the air introduced into the internal space of the laboratory, because an absolute sterile environment needs to be maintained in the biological safety cabinet so that some biological or chemical experiments can proceed normally; therefore, if the same exhaust control system is used for the designated area of ​​the biological safety cabinet and the whole-room area of ​​the laboratory, so that the air standards introduced into the biological safety cabinet and the whole area of ​​the laboratory are the same, the normal progress of the experiment may be affected due to the substandard air cleanliness quality in the biological safety cabinet. Summary of the invention

[0004] The present invention provides a laboratory ventilation system, which uses two independent ventilation and exhaust control systems for the designated area of ​​the biosafety cabinet and the overall area of ​​the laboratory; differentiated ventilation and exhaust operations are performed according to the difference in ventilation air requirements between the designated area and the overall area; for the internal environment of the laboratory, the ventilation air is clean; and for the biosafety cabinet, the ventilation air is clean and sterile at a higher level. The present invention solves the problem that although the current laboratory ventilation system is respectively equipped with a regional ventilation system and a whole-house ventilation system, in essence, only the discharge end is distinguished, and the two use the same exhaust control system and provide the same air quality, which may not be applicable to the ventilation standards in the biosafety cabinet.

[0005] In order to achieve the above technical objectives, the present invention is implemented by the following technical solutions:

[0006] A laboratory ventilation system, comprising: a biological safety cabinet ventilation system and a whole-room ventilation system;

[0007] The ventilation system of the biological safety cabinet comprises: a cabinet air inlet pipe, a cabinet air outlet pipe, a cabinet air inlet pump, a cabinet air outlet pump, and a filter box;

[0008] The outlet end of the cabinet air inlet pipe is connected to the air inlet of the biosafety cabinet, and the inlet end of the cabinet air inlet pipe is connected to the outside of the cabinet to introduce new air into the biosafety cabinet;

[0009] A cabinet air intake pump and a filter box are sequentially arranged near the inlet end of the cabinet air intake pipe and on the cabinet air intake pipe; the cabinet air intake pump is used to pump in external air, and the filter box is used to purify and filter the external air for impurities, bacteria and viruses;

[0010] The inlet end of the cabinet air outlet pipe is connected to the air outlet of the biological safety cabinet, and the outlet end of the cabinet air outlet pipe is led to the outside;

[0011] A cabinet air outlet pump is arranged near the outlet end of the cabinet air outlet pipe and on the cabinet air outlet pipe, and the cabinet air outlet pump is used to pump out the air inside the biosafety cabinet;

[0012] The whole-house ventilation system comprises: an air inlet pipe, an air outlet pipe, an air inlet pump, an air outlet pump, and a filter assembly;

[0013] The inlet end of the air inlet pipe is connected to the outside to introduce new air into the room; the outlet end of the air inlet pipe introduces air into the room;

[0014] An air intake pump and a filter assembly are sequentially arranged near the inlet end of the air intake pipe and on the air intake pipe; the filter assembly is used to filter impurities and floating objects from the air entering the room;

[0015] The inlet end of the air outlet pipe is introduced into the room, and the outlet end of the air outlet pipe is communicated with the outside of the room;

[0016] An air outlet pump is arranged near the outlet end of the air outlet pipe and on the air outlet pipe.

[0017] Preferably, the air outlet pipe is provided with a plurality of telescopic folding pipes on the pipe body located in the room;

[0018] The first end of the telescopic folding tube is connected to the air outlet pipe, and the second end of the telescopic folding tube is provided with an air diffuser;

[0019] The air inlet pipe is provided with a plurality of air inlet branch pipes, the first ends of the air inlet branch pipes are connected to the air inlet pipe, and the second ends of the air inlet branch pipes are connected to the air outlet pipe;

[0020] A group of electric control valves is arranged on each of the air intake branches.

[0021] Preferably, the interior of the diffuser plate is hollow, and the lower bottom surface is an open structure; a through hole is provided at the center position of the upper surface of the diffuser plate;

[0022] The through hole is connected to the second end of the telescopic folding tube;

[0023] A connecting cross bar is arranged on the through hole, and a bearing rod is arranged on the connecting cross bar; and a diffuser blade is rotatably arranged at the lower end of the bearing rod.

[0024] Preferably, air leakage monitoring sensors are provided at the joints between the air inlet pump, the air outlet pump, the cabinet air inlet pump and the cabinet air outlet pump and their respective pipe bodies; the air leakage monitoring sensors are used to monitor whether there is air leakage at the joints between each pump body and the pipe body.

[0025] Preferably, the cabinet air inlet pipe and the cabinet air outlet pipe are respectively connected to the first ends of a plurality of cabinet air inlet branch pipes and cabinet air outlet branch pipes;

[0026] The second end of each of the cabinet air inlet branches is correspondingly connected to an air inlet of a group of biological safety cabinets;

[0027] The second end of each cabinet air outlet branch pipe is correspondingly connected to an air outlet of a group of biological safety cabinets.

[0028] Preferably, a gas leakage monitoring sensor is provided at the joint between each of the cabinet air inlet branch pipe and the cabinet air outlet branch pipe and the biosafety cabinet.

[0029] Preferably, a non-return one-way valve is provided on the air outlet pipe and the cabinet air outlet pipe;

[0030] The non-return one-way valve is used to allow gas to be discharged only from the gas outlet pipe or the cabinet gas outlet pipe without forming a reverse flow.

[0031] Preferably, a drainage air intake fan is provided at the end of the air intake pipe and the cabinet air intake pipe;

[0032] A heat exchanger is arranged at the ends of the air outlet pipe and the cabinet air outlet pipe, and an air collecting box filter is arranged beside the heat exchanger.

[0033] Preferably, the filter assembly is provided with: a mesh filter layer, an activated carbon filter layer, and a biological enzyme adsorption layer in sequence;

[0034] The filter box is provided with: a mesh filter layer, an activated carbon filter layer, a biological enzyme adsorption layer and a biochemical sterilization purification layer in sequence.

[0035] Preferably, an air quality monitor is provided in the biosafety cabinet;

[0036] The air quality monitor is communicatively connected to the PLC processor;

[0037] An electrically controlled flow control valve is provided on the cabinet air inlet pipe;

[0038] The PLC processor is communicatively connected to the cabinet air outlet pump, the cabinet air inlet pump and the electronically controlled flow control valve.

[0039] Preferably, an air pressure monitoring sensor is provided in the biosafety cabinet;

[0040] The air pressure monitoring sensor is communicatively connected to the PLC processor;

[0041] The cabinet air inlet pump and the cabinet air outlet pump are communicatively connected to the PLC processor.

[0042] Preferably, the drainage air intake fan, the air intake pump and the cabinet air intake pump are all communicatively connected to the PLC processor;

[0043] The input end of the PLC processor is communicatively connected to the air volume and wind speed adjustment input module.

[0044] The beneficial effects of the present invention are:

[0045] The laboratory ventilation system provided by the present invention is aimed at the ventilation system of the biological safety cabinet and the indoor environment of the laboratory, and a separate exhaust control system and a separate component for filtering are respectively provided; the ventilation requirements and air cleanliness requirements of different standards for the biological safety cabinet and the indoor environment are strictly met;

[0046] Leakage monitoring sensors are installed at the joints between the pump body and the pipeline, as well as the joints between the cabinet air inlet branch pipe, the cabinet air outlet branch pipe and the biosafety cabinet, which may form non-complete sealing. The tightness of the above-mentioned positions is monitored to avoid leakage and affect the normal ventilation. The key is to prevent the sealing of the biosafety cabinet from being damaged.

[0047] Check valves are installed on the indoor air outlet pipe and the cabinet air outlet pipe to prevent the dirty gas discharged from the air outlet pipe or the cabinet from flowing back.

[0048] An air quality monitor is installed in the biosafety cabinet. When the air quality index in the cabinet is monitored to be lower than the threshold, the PLC processor controls the cabinet outlet pump to operate at a relatively high power to accelerate the rapid discharge of low-quality air. When the air pressure monitoring sensor in the biosafety cabinet obviously detects that the air pressure in the cabinet is significantly reduced, the PLC processor controls the cabinet intake pump and the electric control flow regulating valve to start running simultaneously with the cabinet outlet pump; at this time, the cabinet intake pump power is greater than the cabinet outlet pump, and the electric control flow regulating valve opens the maximum flow; quickly replenishes fresh air into the cabinet, and gradually removes the remaining dirty air in the cabinet; until the air quality in the cabinet returns to the standard range;

[0049] A foldable telescopic tube is provided in the laboratory room in communication with the air inlet pipe and the air outlet pipe, and an air diffuser is provided at the lower end of the foldable telescopic tube; air diffusers are provided in the air diffuser, and the air diffusers can be driven to rotate when the air passes through the air diffuser; thus, when the air enters the laboratory from the air inlet pipe through the air diffuser, the rotation of the air diffuser will help the air diffuse over a wider range; when the indoor air is discharged from the air outlet pipe through the air diffuser, the air diffuser will also help speed up the inhalation of indoor air during the rotation process;

[0050] The diffuser is connected by a telescopic folding tube, and the height of the diffuser can be adjusted by the telescopic folding tube. According to the spatial distribution of different laboratories and the dirty gas generated after the experiment, if the dirty gas is concentrated in a certain part of the space, the diffuser can be pulled to the area where the dirty gas is concentrated by dragging the telescopic folding tube, so as to quickly discharge the dirty gas with a high concentration in the area in a targeted manner;

[0051] Heat exchange is arranged at the ends of the air outlet pipe and the cabinet air outlet pipe. When the heat content of the dirty gas generated in the experiment is high, the heat in the dirty gas can be exchanged out through the heat exchanger to realize the secondary utilization of heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0052] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0053] Figure 1 It is a schematic diagram of the structure of the indoor partial ventilation system of the present invention;

[0054] Figure 2 It is a schematic diagram of the structure of the ventilation system of the biological safety cabinet of the present invention;

[0055] Figure 3 It is a schematic diagram of the internal structure of the gas diffuser of the present invention;

[0056] Figure 4 It is a schematic diagram of the structure of the cabinet air pressure monitoring and control principle of the present invention;

[0057] Figure 5 It is a schematic diagram of the structure of the air volume and wind speed control principle of the present invention;

[0058] Figure 6 It is a schematic diagram of the air quality monitoring principle structure of the present invention;

[0059] In the accompanying drawings, the structural names represented by the reference numerals are:

[0060] 1-inlet pipe, 101-inlet branch pipe, 102-electrically controlled valve, 2-outlet pipe, 3-telescopic folding pipe, 4-diffuser plate, 401-diffuser blade, 402-bearing rod, 5-inlet pump, 6-drainage inlet fan, 7-leakage monitoring sensor, 8-outlet pump, 9-air collection box filter, 10-heat exchanger, 11-check valve, 12-biological safety cabinet, 13-cabinet inlet pipe, 1301-cabinet inlet branch pipe, 14-cabinet outlet pipe, 1401-cabinet outlet branch pipe, 15-cabinet inlet pump, 16-filter box, 17-electrically controlled flow regulating valve, 18-cabinet outlet pump. DETAILED DESCRIPTION

[0061] 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.

[0062] Example 1

[0063] A laboratory ventilation system, comprising: a biological safety cabinet ventilation system and a whole-room ventilation system;

[0064] like Figure 2 The figure shows the ventilation system of the biological safety cabinet, including: a cabinet air inlet pipe 13, a cabinet air outlet pipe 14, a cabinet air inlet pump 15, a cabinet air outlet pump 18, and a filter box 16;

[0065] The outlet end of the cabinet air inlet pipe 13 is connected to the air inlet port opened on the top surface of the biosafety cabinet 12, and the specific connection structure is: a plurality of cabinet air inlet branch pipes 1301 are arranged on the cabinet air inlet pipe 13, and each cabinet air inlet branch pipe 1301 corresponds to a group of biosafety cabinets 12, and the first end of the cabinet air inlet branch pipe 1301 is connected to the cabinet air inlet pipe 13, and the second end of the cabinet air inlet branch pipe 1301 is connected to the air inlet port opened on the top surface of the biosafety cabinet 12; the inlet end of the cabinet air inlet pipe 13 extends out of the laboratory and communicates with the outdoors; fresh air from the outdoors can enter from the inlet end of the cabinet air inlet pipe 13 and reach the biosafety cabinet 12 along the cabinet air inlet pipe 13; a drainage air inlet fan 6 is arranged on the inlet end of the cabinet air inlet pipe 13 located outdoors, and the rotation of the drainage air inlet fan 6 can assist in Outdoor air is sucked into the cabinet air intake pipe 13 from the inlet end; a cabinet air intake pump 15 and a filter box 16 are sequentially arranged near the inlet end of the cabinet air intake pipe 13 and on the cabinet air intake pipe 13; the cabinet air intake pump 15 pumps the outside air into the cabinet air intake pipe 13, and the air passing through the cabinet air intake pump 15 reaches the filter box 16, where the outside air is purified and filtered; the filter box 16 is sequentially arranged inside: a mesh filter layer, an activated carbon filter layer, a biological enzyme adsorption layer and a biochemical sterilization purification layer; the mesh filter layer is used to filter particulate impurities in the outside air, the activated carbon filter layer is used to adsorb tiny particles, the biological enzyme adsorption layer is used to adsorb odor substances in the air, and the biochemical sterilization purification layer is used to disinfect bacteria, viruses, etc. in the outside air;

[0066] like Figure 2 As shown, the inlet end of the cabinet air outlet pipe 14 is connected to the air outlet of the biological safety cabinet 12, and the specific connection structure is: a plurality of cabinet air outlet branch pipes 1401 are arranged on the cabinet air outlet pipe 14, and each cabinet air outlet branch pipe 1401 corresponds to a group of biological safety cabinets 12; the first end of the cabinet air outlet branch pipe 1401 is connected to the cabinet air outlet pipe 14, and the second end of the cabinet air outlet branch pipe 1401 is connected to the air outlet of the biological safety cabinet 12; the outlet end of the cabinet air outlet pipe 14 is led to the outdoors; a cabinet air outlet pump 18 is arranged near the outlet end of the cabinet air outlet pipe 14 and located on the cabinet air outlet pipe 14, and the cabinet air outlet pump 18 can pump the dirty air in the biological safety cabinet 12 out of the cabinet through the cabinet air outlet pipe 14.

[0067] like Figure 1 The whole house ventilation system is shown, including: an air inlet pipe 1, an air outlet pipe 2, an air inlet pump 5, an air outlet pump 8, and a filter assembly;

[0068] The inlet end of the air intake pipe 1 is communicated with the room, and a drainage air intake fan 6 is arranged on the inlet end of the air intake pipe 1. The rotation of the drainage air intake fan 6 can help speed up the suction of external air into the air intake pipe 1; an air intake pump 5 is arranged near the inlet end of the air intake pipe 1 and on the air intake pipe 1, and a filter assembly is arranged beside the air intake pump 5; the external air is pumped into the air intake pipe 1 through the air intake pump 5; the air passing through the air intake pump 5 reaches the filter assembly, and the filter assembly is sequentially arranged inside: a mesh filter layer, an activated carbon filter layer, and a biological enzyme adsorption layer; the filter assembly filters impurities and floating objects in the air entering the laboratory;

[0069] The inlet end of the outlet pipe 2 is introduced into the room, and the outlet end of the outlet pipe 2 is led to the outside and communicated with the outside; an outlet pump 8 is arranged near the outlet end of the outlet pipe 2 and on the outlet pipe 2, and the polluted air in the room can be pumped into the outlet pipe 2 by the outlet pump 8 and discharged to the outside; a plurality of telescopic folding tubes 3 are arranged on the pipe body of the outlet pipe 2 located in the room, the first end of the telescopic folding tube 3 is connected to the outlet pipe 2, and an air diffuser 4 is arranged on the second end of the telescopic folding tube 3; a plurality of inlet branch pipes 101 are also arranged on the inlet pipe 1, the first end of the inlet branch pipe 101 is connected to the inlet pipe 1, and the inlet branch pipe 101 is connected to the inlet pipe 1. The second end of 1 is connected to the outlet pipe 2; the number of the telescopic folding pipes 3 is the same as the number of the air inlet branch pipes 101, and each air inlet branch pipe 101 is directly opposite to a telescopic folding pipe 3; each air inlet branch pipe 101 is provided with a group of electric control valves 102; when the whole-house ventilation system is in the stage of discharging indoor dirty gas, the electric control valve is closed, and the indoor dirty gas can only be discharged from the outlet pipe 2 through the diffuser 4; on the contrary, when the whole-house ventilation system is in the stage of introducing outside air, the electric control valve 102 is opened, and the air entering from the air inlet pipe is discharged from the diffuser 4 to the room through the telescopic folding pipe 3;

[0070] like Figure 3 As shown, the structure of the above-mentioned diffuser plate 4 is hollow inside, and the lower bottom surface is set as an open structure; a through hole is opened at the center position of the upper surface of the diffuser plate 4; the second end of the telescopic folding tube 3 is connected to the through hole; a connecting cross bar is set on the through hole, and a bearing rod is set on the connecting cross bar, and a diffuser leaf 401 is rotatably set at the lower end of the bearing rod; when air passes through the diffuser plate 4, the diffuser leaf 401 can be driven to rotate, and when air enters the laboratory from the air inlet pipe 1 through the diffuser plate 4, the rotation of the diffuser leaf 401 will assist the air to increase the diffusion range; when the air is discharged from the air outlet pipe 2 through the diffuser plate 4, the diffuser leaf 401 will assist in accelerating the inhalation of indoor air during the rotation process.

[0071] Example 2

[0072] Based on Example 1, in Example 1, the air inlet pipe 1 and the air inlet branch pipe 101 of the whole-house ventilation system, the air outlet pipe 2 and the upper end of the folding telescopic pipe 3; the cabinet air inlet pipe 13 and the cabinet air inlet branch pipe 1301 of the biological safety cabinet ventilation system, and the cabinet air outlet pipe 14 and the cabinet air outlet branch pipe 1401 are all connected by welding; if a plastic pipe made of a composite material is used, it is connected by melting; the purpose is to reduce the gaps that may exist at the pipe joints, which may cause leakage during the process of air intake or exhaust;

[0073] like Figure 1 As shown, for the positions where it is impossible to achieve finalized welding or melting, such as the joints between the air inlet pump 5, the air outlet pump 8, the cabinet air inlet pump 15 and the cabinet air outlet pump 18 and their respective pipe bodies; each of the cabinet air inlet branch pipes 1301 and the cabinet air outlet branch pipes 1401 and the biological safety cabinet 12; a gas leakage monitoring sensor 7 is provided; the gas leakage monitoring sensor 7 is communicatively connected to the PLC processor, and when one or several of the gas leakage monitoring sensors 7 detect a gas leakage at its point, the gas leakage monitoring sensor 7 will feed the monitoring signal into the PLC processor, and the PLC processor determines which point the gas leakage monitoring sensor 7 is feeding the signal, and displays the leakage point information on the terminal display; it is convenient for the staff to discover and deal with it in time.

[0074] Example 3

[0075] Based on Example 1, in Example 1, whether it is a whole-house ventilation system or a biological safety cabinet ventilation system, after the exhaust pipe 2 and the cabinet exhaust pipe 14 include exhaust gases in the room or in the cabinet, some residual gases in the pipe that have not been exhausted may flow back into the room or in the cabinet;

[0076] like Figure 1 as well as Figure 2 As shown, in this embodiment, a non-return valve 11 is provided on the air outlet pipe 2 and the cabinet air outlet pipe 14. The dirty gas in the room or the cabinet can be discharged normally through the non-return valve 11, but the non-return valve 11 can be used to prevent the gas in the air outlet pipe 2 or the cabinet air outlet pipe 14 from flowing back into the room or the biological safety cabinet 12.

[0077] Example 4

[0078] Based on Example 1, in Example 1, before the experiment is carried out in the biosafety cabinet 12, the air in the cabinet is purified to ensure that the air cleanliness in the cabinet meets the standard; however, as the experiment proceeds, impurities generated during the experiment will destroy the air cleanliness inside the cabinet, reducing its cleanliness to the point where it cannot meet the experimental standard; at this time, the air in the cabinet needs to be replaced in time, otherwise it may affect the normal progress of the experiment;

[0079] like Figure 6 As shown, in this embodiment, an air quality monitor is arranged in the biosafety cabinet 12 to monitor the impurity level, colony level and other indicators of the air inside the cabinet, so as to judge the air quality inside the cabinet; the air quality monitor is connected to the PLC processor by communication; an electric control flow control valve 17 is arranged on the cabinet air inlet pipe; the cabinet air outlet pump 18, the cabinet air inlet pump 15 and the electric control flow control valve 17 are all connected to the PLC processor by communication; when it is monitored that the air quality indicator inside the cabinet is lower than the threshold value, the PLC processor controls the cabinet air outlet pump 18 to run , and operates at a relatively high power to accelerate the rapid discharge of low-quality air. When the air pressure monitoring sensor in the biosafety cabinet 12 obviously detects that the air pressure in the cabinet is significantly reduced, the PLC processor controls the cabinet air intake pump 15 and the electric control flow regulating valve 17 to start running simultaneously with the cabinet air outlet pump 18; at this time, the power of the cabinet air intake pump 15 is greater than that of the cabinet air outlet pump 18, and the electric control flow regulating valve 17 opens the maximum flow; quickly replenishes fresh air into the cabinet, and gradually removes the remaining dirty air in the cabinet; until the air quality in the cabinet returns to within the standard range.

[0080] As a preferred embodiment, when the air in the cabinet is replaced by simultaneously inletting and outletting air, in order to keep the air pressure in the cabinet always maintained in a relatively stable state; an air pressure monitoring sensor is arranged in the cabinet, and the air pressure monitoring sensor is communicatively connected to the PLC processor; the monitoring result of the air pressure monitoring sensor is used as a reference for regulation, so as to comprehensively regulate the operation of the cabinet air intake pump 15, the cabinet air outlet pump 18 and the electric control flow regulating valve 17 in the above manner.

[0081] Example 5

[0082] Based on Example 1, Figure 5 As shown, in this embodiment, the drainage air intake fan 6, the air intake pump 5 and the cabinet air intake pump 15 arranged at the end of the air intake pipe 1 and the cabinet air intake pipe 13 are all communicatively connected to the PLC processor; the input end of the PLC processor is communicatively connected to the air volume and wind speed adjustment input module, which module can be an input terminal; the air volume and wind speed parameters of the incoming air are set through the air volume and wind speed adjustment input module, and the PLC processor regulates the operating power of the drainage air intake fan 6, the air intake pump 5 and the cabinet air intake pump 15 according to the parameters, thereby realizing the regulation of the air volume and wind speed of the incoming air.

[0083] Example 6

[0084] Based on Example 1, as the experiment proceeds, the indoor temperature, especially the temperature in the biosafety cabinet, may increase as the experiment proceeds, and the air temperature in the room and the biosafety cabinet will also increase;

[0085] like Figure 1 as well as Figure 2 As shown, a heat exchanger 10 is arranged at the end of the air outlet pipe 2 of the whole-house ventilation system, and a wind collecting box filter 9 is arranged beside the heat exchanger 10; a heat exchanger 10 is arranged at the end of the cabinet air outlet pipe 14 of the ventilation system of the biological safety cabinet 12, and a wind collecting box filter 9 is arranged beside the heat exchanger 10;

[0086] The air collecting box filter 9 can be used to filter impurities in the exhaust air, and the filtered air is discharged after passing through the heat exchanger 10; when passing through the heat exchanger 10, the heat in the exhaust air can be heat exchanged to achieve heat collection and utilization.

[0087] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0088] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can well understand and use the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A laboratory ventilation system, characterized in that: include: Biosafety cabinet ventilation system and whole-room ventilation system; The ventilation system of the biological safety cabinet comprises: a cabinet air inlet pipe, a cabinet air outlet pipe, a cabinet air inlet pump, a cabinet air outlet pump, and a filter box; The outlet end of the cabinet air inlet pipe is connected to the air inlet of the biosafety cabinet, and the inlet end of the cabinet air inlet pipe is connected to the outside of the cabinet to introduce new air into the biosafety cabinet; A cabinet air intake pump and a filter box are sequentially arranged near the inlet end of the cabinet air intake pipe and on the cabinet air intake pipe; the cabinet air intake pump is used to pump in external air, and the filter box is used to purify and filter the external air for impurities, bacteria and viruses; The inlet end of the cabinet air outlet pipe is connected to the air outlet of the biological safety cabinet, and the outlet end of the cabinet air outlet pipe is led to the outside; A cabinet air outlet pump is arranged near the outlet end of the cabinet air outlet pipe and on the cabinet air outlet pipe, and the cabinet air outlet pump is used to pump out the air inside the biosafety cabinet; The whole-house ventilation system comprises: an air inlet pipe, an air outlet pipe, an air inlet pump, an air outlet pump, and a filter assembly; The inlet end of the air inlet pipe is connected to the outside to introduce new air into the room; the outlet end of the air inlet pipe introduces air into the room; An air intake pump and a filter assembly are sequentially arranged near the inlet end of the air intake pipe and on the air intake pipe; the filter assembly is used to filter impurities and floating objects from the air entering the room; The inlet end of the air outlet pipe is introduced into the room, and the outlet end of the air outlet pipe is communicated with the outside of the room; an air outlet pump is arranged near the outlet end of the air outlet pipe and on the air outlet pipe.

2. A laboratory ventilation system according to claim 1, characterized in that: The outlet pipe is located in the chamber and a plurality of telescopic folding pipes are arranged on the pipe body; The first end of the telescopic folding tube is connected to the air outlet pipe, and the second end of the telescopic folding tube is provided with an air diffuser; The air inlet pipe is provided with a plurality of air inlet branch pipes, the first ends of the air inlet branch pipes are connected to the air inlet pipe, and the second ends of the air inlet branch pipes are connected to the air outlet pipe; A group of electric control valves are arranged on each of the air intake branches; The air diffuser is hollow inside and has an open bottom surface. A through hole is provided at the center of the upper surface of the air diffuser. The through hole is connected to the second end of the telescopic folding tube; A connecting cross bar is arranged on the through hole, and a bearing rod is arranged on the connecting cross bar; and a diffuser blade is rotatably arranged at the lower end of the bearing rod.

3. A laboratory ventilation system according to claim 1, characterized in that: Leakage monitoring sensors are provided at the joints of the air inlet pump, the air outlet pump, the cabinet air inlet pump and the cabinet air outlet pump with their respective pipe bodies; the leakage monitoring sensors are used to monitor whether there is leakage at the joints between each pump body and the pipe body.

4. A laboratory ventilation system according to claim 1, characterized in that: The cabinet air inlet pipe and the cabinet air outlet pipe are respectively connected to the first ends of a plurality of cabinet air inlet branch pipes and cabinet air outlet branch pipes; The second end of each of the cabinet air inlet branches is correspondingly connected to an air inlet of a group of biological safety cabinets; The second end of each of the cabinet air outlet branches is correspondingly connected to the air outlet of a group of biological safety cabinets; A gas leakage monitoring sensor is arranged at the joint between each of the cabinet air inlet branch pipe and the cabinet air outlet branch pipe and the biosafety cabinet.

5. A laboratory ventilation system according to claim 1, characterized in that: The air outlet pipe and the cabinet air outlet pipe are both provided with non-return one-way valves; The non-return one-way valve is used to allow gas to be discharged only from the gas outlet pipe or the cabinet gas outlet pipe without forming a reverse flow.

6. A laboratory ventilation system according to claim 1, characterized in that: The ends of the air inlet pipe and the cabinet air inlet pipe are provided with a drainage air inlet fan; A heat exchanger is arranged at the ends of the air outlet pipe and the cabinet air outlet pipe, and an air collecting box filter is arranged beside the heat exchanger.

7. A laboratory ventilation system according to claim 1, characterized in that: The filter assembly is provided with: a mesh filter layer, an activated carbon filter layer, and a biological enzyme adsorption layer in sequence; The filter box is provided with: a mesh filter layer, an activated carbon filter layer, a biological enzyme adsorption layer and a biochemical sterilization purification layer in sequence.

8. A laboratory ventilation system according to claim 1, characterized in that: An air quality monitor is provided in the biosafety cabinet; The air quality monitor is communicatively connected to the PLC processor; An electrically controlled flow control valve is provided on the cabinet air inlet pipe; The PLC processor is communicatively connected to the cabinet air outlet pump, the cabinet air inlet pump and the electronically controlled flow control valve.

9. A laboratory ventilation system according to claim 1, characterized in that: An air pressure monitoring sensor is arranged in the biosafety cabinet; The air pressure monitoring sensor is communicatively connected to the PLC processor; The cabinet air inlet pump and the cabinet air outlet pump are communicatively connected to the PLC processor.

10. A laboratory ventilation system according to claim 6, characterized in that: The drainage air intake fan, the air intake pump and the cabinet air intake pump are all communicatively connected to the PLC processor; The input end of the PLC processor is communicatively connected to the air volume and wind speed adjustment input module.

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