CN112856456A - Constant temperature and humidity intelligent laboratory exhaust system - Google Patents

Abstract

The invention relates to the technical field of exhaust systems, in particular to a constant-temperature and constant-humidity intelligent laboratory exhaust system which comprises a controller, a steady-flow air inlet device, a detection assembly and an outlet air filtering mechanism, wherein the steady-flow air inlet device comprises an air inlet box, a steady-flow air inlet plate, a middle steady-flow plate and a steady-flow air outlet plate, a plurality of steady-flow holes are respectively arranged on the steady-flow air inlet plate and the steady-flow air outlet plate, a plurality of through holes are arranged on the middle steady-flow plate, the detection assembly comprises a temperature sensor and a humidity sensor, and the outlet air filtering mechanism comprises a filtering mechanism and a combustion box. Energy is saved, and the laboratory constant temperature and humidity are realized simultaneously when harmful gas in the laboratory is discharged.

Description

Constant temperature and humidity intelligent laboratory exhaust system

Technical Field

The invention relates to the technical field of exhaust systems, in particular to a constant-temperature constant-humidity intelligent laboratory exhaust system.

Background

In the existing laboratory exhaust system, the room exhaust and the process equipment exhaust are usually integrated, so that the air quantity flowing through the waste gas treatment device in the exhaust system is large, the concentration of harmful gas is relatively low, and the treatment of the harmful gas is not facilitated, Chinese invention patent CN112344468A discloses a constant temperature and humidity equipment for a fermentation room, which comprises a mechanical part and a control part. The mechanical part comprises an air conditioning unit which is arranged at the fermentation chamber and is used for changing and/or maintaining the temperature in the fermentation chamber. The air exhaust system is arranged at the fermentation chamber and used for exhausting air in the fermentation chamber, and the fresh air system is arranged at the fermentation chamber and used for conveying air into the fermentation chamber. The control part comprises a processing module used for calculating, judging and issuing instructions and controlling the change speed and the duration of the temperature and/or the humidity of the fermentation chamber, a control box electrically connected with the processing module and the air conditioning unit and used for receiving and processing the instructions from the processing module and controlling the air conditioning unit, the exhaust system, the fresh air system and/or the humidifier and the dryer, a monitoring module electrically connected with the control box and used for collecting real-time data of the temperature and/or the humidity inside and outside the temperature fermentation chamber, and a communication module used for realizing the communication among the processing module, the control box, the monitoring module, the air conditioning unit and/or the humidifier and the dryer. Although the above-mentioned prior art exhaust system can achieve a constant temperature and humidity, the following problems still exist,

firstly, the air flow is too large when the existing air exhaust system exhausts air, for some biological laboratories, culture dishes in many experiments are arranged in the biological laboratories, the culture environment of the culture dishes is changed due to too large air flow speed, some influence is caused on the experiments, and certain experimental errors are caused,

secondly, there is harmful gas in some labs, and current exhaust system adds some subassemblies of some filter layers in air outlet department, is difficult to filter all harmful gas, can't thoroughly solve the problem that harmful gas was put outward.

In view of the above, the present invention provides a constant temperature and humidity intelligent laboratory exhaust system and a control method thereof, so as to solve at least one problem in the prior art.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and particularly solves the technical problems that the air flow is too large, the experiment is influenced, harmful gases are difficult to filter and discharge and the like when the existing exhaust system exhausts air. And provides a constant temperature and humidity intelligent laboratory exhaust system.

In order to solve the above problems, the present invention provides the following technical solutions:

a constant temperature and humidity intelligent laboratory exhaust system comprises a controller, and also comprises a steady flow air inlet device, a detection component and an air outlet filtering mechanism which are electrically connected with the controller, wherein the steady flow air inlet device comprises an air inlet box, a steady flow air inlet plate, a middle steady flow plate and a steady flow air outlet plate which are sequentially arranged along the air inlet direction and are parallel to each other, a plurality of steady flow holes which are arranged in a matrix form are arranged on the steady flow air inlet plate and the steady flow air outlet plate, the steady flow holes are horn-shaped, the steady flow hole big end of the steady flow air inlet plate is opposite to the steady flow hole big end of the steady flow air outlet plate, the central line of the steady flow hole is vertical to the plane of the middle steady flow plate, the middle steady flow plate is provided with a plurality of through holes which are simultaneously communicated with the steady flow hole big end of the steady flow air inlet plate and the steady flow hole big end of the steady flow air outlet plate, the detection component comprises a, the air outlet filtering mechanism comprises a filtering mechanism and a combustion box communicated with the air outlet end of the filtering mechanism, and the combustion box is communicated with the air inlet box through a hot air pipe.

Preferably, all be provided with the choked flow portion in all the cross holes of middle stabilizer, the choked flow portion is the circular cone face guard, and the central line of choked flow portion is parallel with the central line of steady flow hole, and the big head end of choked flow portion is towards the steady flow hole of steady flow air inlet plate, and the big head end of choked flow portion is through a plurality of fixed head and via hole inner wall fixed connection, and the via hole is cylindrical structure, the diameter of the via hole that the diameter of the big head end of choked flow portion is less than.

Preferably, the filtering mechanism comprises a filtering box and an exhaust fan communicated with the air inlet end of the filtering box, the filtering box is internally divided into an acidic dissolution cavity and a filtering cavity by a middle partition plate, a wedge plate is arranged right above the acidic dissolution cavity and inclines towards the filtering cavity, the air inlet end of the filtering box is provided with a plurality of air inlet pipes, one end of each air inlet pipe is communicated with the exhaust fan, the other end of each air inlet pipe penetrates through the wedge plate from top to bottom and extends into the bottom of the acidic dissolution cavity, the acidic dissolution cavity is communicated with the filtering cavity by a plurality of connecting pipes, the connecting pipes are arranged in the filtering box, one end of each connecting pipe penetrates through the middle partition plate and extends to the position right below the top end of the bottom of the wedge plate, the other end of each connecting pipe extends to the bottom of the filtering cavity, and the filtering box is arranged at the upper half section of the.

Preferably, the combustion box comprises an exhaust pipe, a hot air box and a burner, the hot air box and the burner are sleeved outside the exhaust pipe, the ventilation pipe penetrates through the outer box and is communicated with the exhaust pipe, the burner is installed at the end part of the exhaust pipe, and the two ends of the hot air box seal the space between the hot air box and the exhaust pipe through square frames.

Preferably, an electric heating tube is arranged in the air inlet box, two ends of the hot air tube are respectively communicated with the hot air box and the air inlet box, a fan is installed on the hot air tube, a plurality of air inlet holes are formed in one square frame, and the electric heating tube and the fan are electrically connected with the controller through a contactor.

Preferably, the air inlet box is provided with an air guide pipe, one end of the air guide pipe is provided with a fan, the other end of the air guide pipe is communicated with the air inlet box, and the air inlet direction of the air guide pipe is perpendicular to the center line of the flow stabilizing hole.

Preferably, the controller is further electrically connected with a humidifier.

The invention also discloses a control method of the constant-temperature constant-humidity intelligent laboratory exhaust system, which comprises the following steps:

step S1: if the indoor air of the laboratory has harmful gases, starting an exhaust fan, all fans and a burner through a controller, filtering the indoor air once through an acidic dissolution cavity and a filter cavity, then enabling the indoor air to enter a hot air box, enabling the hot air box to generate high temperature through the burner, thermally decomposing the indoor air in the hot air box, then discharging, and entering the step S2;

step S2: when the temperature sensor detects that the indoor temperature is reduced, an electric signal is transmitted to the controller, the controller controls the fan on the hot air pipe to start, air in the hot air box is conveyed into the air inlet box, and then the step S3 is carried out;

step S3: when the fan on the hot air pipe is started for a certain time, the temperature sensor detects that the indoor temperature still does not reach a preset value, and the controller controls the contactor to start the electric heating pipe;

step S4: when the humidity sensor continuously detects that the indoor humidity is lower than the preset value for multiple times, an electric signal is transmitted to the controller, the controller controls the humidifier to be started, and when the humidity sensor continuously detects that the indoor humidity is higher than the preset value for multiple times, the controller closes the humidifier.

In conclusion, compared with the prior art, the constant-temperature constant-humidity intelligent laboratory exhaust system has the following beneficial effects:

one is as follows: according to the invention, air enters the flow stabilizing holes of the flow stabilizing air inlet device, and the flow choking part blocks the over-fast air flow, so that the air in the air inlet box can stably enter the room and can quickly overflow and disperse to form turbulent flow, the air can stably enter the room, the air can be exhausted on the premise of not influencing the indoor air flow environment, the influence of the air flow on the experiment is eliminated, and the experiment error is reduced;

the second step is as follows: if the laboratory air has harmful gases, the exhaust fan, all fans and the burner are started through the controller, the indoor air is filtered for the first time through the acidic dissolution cavity and the filter cavity, then the indoor air enters the hot air box, the burner enables the hot air box to generate high temperature, chemical bonds of compounds in the indoor air in the hot air box are thermally decomposed and discharged, and potential safety hazards of the laboratory air to the external environment can be reduced.

And thirdly: the invention can lead the hot air generated by the burner in the hot air box back to the air inlet box, assists the electric heating pipe to improve the heating efficiency of air, recycles the hot air generated by the burner and saves energy.

Fourthly, the method comprises the following steps: according to the invention, through the matching of the detection assembly, the electric heating tube, the hot air box and the humidifier, the constant temperature and humidity of the laboratory can be realized under the action of discharging harmful gases in the laboratory.

Drawings

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a top view of the constant flow air intake apparatus of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of FIG. 3 at B;

FIG. 5 is a schematic view of a cross-sectional view of a portion of a steady flow intake device of the present invention;

FIG. 6 is an enlarged view at C of FIG. 5;

FIG. 7 is a schematic cross-sectional view of the outlet air filtering mechanism of the present invention;

FIG. 8 is a schematic partial perspective cross-sectional view of the outlet air filter mechanism of the present invention;

FIG. 9 is a top plan view of the combustion case of the present invention;

FIG. 10 is a cross-sectional view taken along line D-D of FIG. 9;

description of reference numerals:

1. a steady flow air inlet device; 11. an air inlet box; 12. a steady flow air inlet plate; 13. a middle flow stabilizer; 14. an air outlet plate; 15. flow stabilizing holes; 16. a flow-impeding portion; 17. a fixed head; 18. a via hole; 2. an air outlet filtering mechanism; 21. a filter box; 22. an acidic dissolution chamber; 23. a filter chamber; 24. a wedge plate; 25. an air inlet pipe; 26. a connecting pipe; 27. a vent pipe; 28. an exhaust fan; 3. an exhaust duct; 31. a hot air box; 32. a burner; 33. a square frame; 34. an air inlet hole; 4. an electric heating tube; 5. a fan; 6. an air guide pipe; 7. a hot air pipe.

Detailed Description

Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.

In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.

In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.

Example 1:

referring to fig. 1 to 10, an intelligent laboratory exhaust system with constant temperature and humidity is shown, which comprises a controller, and the exhaust system further comprises a steady flow air inlet device 1, a detection component and an outlet air filtering mechanism 2, which are all electrically connected with the controller, wherein the steady flow air inlet device 1 comprises an air inlet box 11, a steady flow air inlet plate 12, a middle steady flow plate 13 and a steady flow outlet plate 14, which are all arranged in sequence along the air inlet direction and are parallel to each other, a plurality of steady flow holes 15 arranged in a matrix form are respectively arranged on the steady flow air inlet plate 12 and the steady flow outlet plate 14, the steady flow holes 15 are horn-shaped, the big ends of the steady flow holes 15 of the steady flow air inlet plate 12 are opposite to the big ends of the steady flow holes 15 of the steady flow outlet plate 14, the central line of the steady flow holes 15 is perpendicular to the plane of the middle steady flow plate 13, the middle steady flow plate 13 is provided with a plurality of through holes 18 which are simultaneously communicated with the big ends of the, the detection assembly comprises a temperature sensor and a humidity sensor which are both electrically connected with the controller, the air-out filtering mechanism 2 comprises a filtering mechanism and a combustion box communicated with the air-out end of the filtering mechanism, and the combustion box is communicated with the air inlet box 11 through a hot air pipe 7.

If the indoor air in the laboratory has harmful gases, the exhaust fan 28, all the fans 5 and the burner 32 are started through the controller, the indoor air is filtered once through the filtering mechanism, then the indoor air enters the hot air box 31, the burner 32 enables the hot air box 31 to generate high temperature, chemical bonds of compounds in the indoor air in the hot air box 31 are thermally decomposed and then are exhausted,

when the laboratory begins the air inlet, the air gets into air inlet box 11, a steady flow cavity is constituteed to the stationary flow hole 15 of stationary flow air inlet plate 12, the via hole 18 of middle stationary flow board 13 and the stationary flow hole 15 of stationary flow play aerofoil 14, air gets into the steady flow cavity in air inlet box 11, reduce the wind speed, can make air in air inlet box 11 steadily get into indoorly, and overflow fast and scatter and can't form the sinuous flow, make can air exhaust under the indoor air current environment prerequisite not influenced, eliminate the air current and to can produce some influences to the experiment, reduce experimental error.

All the through holes 18 of the middle flow stabilizing plate 13 are internally provided with flow blocking parts 16, the flow blocking parts 16 are conical, the central lines of the flow blocking parts 16 are parallel to the central line of the flow stabilizing hole 15, the large head ends of the flow blocking parts 16 face the flow stabilizing hole 15 of the flow stabilizing air inlet plate 12, the large head ends of the flow blocking parts 16 are fixedly connected with the inner wall of the through holes 18 through a plurality of fixing heads 17, the through holes 18 are cylindrical, the diameter of the large head ends of the flow blocking parts 16 is smaller than that of the through holes 18, the flow blocking parts 16 block over-fast air flow, and the air flow is diffused, so that the air can stably enter the room.

The filtering mechanism comprises a filtering box 21 and an exhaust fan 28 communicated with the air inlet end of the filtering box 21, the filtering box 21 is internally divided into an acidic dissolution cavity 22 and a filtering cavity 23 by a middle partition plate, a wedge plate 24 is arranged right above the acidic dissolution cavity 22 of the filtering box 21, the wedge plate 24 is obliquely arranged towards the filtering cavity 23, a plurality of air inlet pipes 25 are arranged at the air inlet end of the filtering box 21, one end of each air inlet pipe 25 is communicated with the exhaust fan 28, the other end of each air inlet pipe 25 penetrates through the wedge plate 24 from top to bottom and extends into the bottom of the acidic dissolution cavity 22, the acidic dissolution cavity 22 is communicated with the filtering cavity 23 through a plurality of connecting pipes 26, the connecting pipe 26 is located in the filter box 21, one end of the connecting pipe 26 passes through the middle separation plate and extends to the position right below the top end of the bottom of the wedge plate 24, the other end of the connecting pipe 26 extends to the bottom of the filter cavity 23, and the filter box 21 is located at the upper half section of the filter box 21 and is communicated with the combustion box through a ventilation pipe 27.

If the laboratory room air has harmful gas, start exhaust fan 28 through the controller, all fans 5 and combustor 32, room air carries out once through acidity dissolve chamber 22 and filter chamber 23 and filter, acidity dissolve and be equipped with acidity respectively in chamber 22 and the filter chamber 23 and dissolve liquid and water, then room air gets into hot-blast case 31, combustor 32 makes hot-blast case 31 produce high temperature, carry out thermal decomposition and discharge with the chemical bond of the compound in the room air in the hot-blast case 31, can reduce the gas of laboratory potential safety hazard to external environment.

The combustion box includes exhaust pipe 3, the cover establishes hot-blast case 31 and combustor 32 outside exhaust pipe 3, ventilation pipe 27 passes outer container and exhaust pipe 3 intercommunication, and the tip at exhaust pipe 3 is installed to combustor 32, and hot-blast case 31 both ends are all sealed the space between hot-blast case 31 and exhaust pipe 3 through square frame 33, hot-blast case 31 not with exhaust pipe 3 intercommunication, combustor 32 starts the air temperature heating between with exhaust pipe 3 and hot-blast case 31.

An electric heating tube 4 is arranged in the air inlet box 11, two ends of the hot air tube 7 are respectively communicated with the hot air box 31 and the air inlet box 11, a fan 5 is arranged on the hot air tube 7, a plurality of air inlet holes 34 are arranged on one square frame 33, the electric heating tube 4 and the fan 5 are electrically connected with a controller through a contactor, when a temperature sensor detects that the indoor temperature is reduced, an electric signal is transmitted to the controller, the controller controls the fan 5 on the hot air tube 7 to start, and the air in the hot air box 31 is conveyed into the air inlet box 11,

the air inlet box 11 is provided with an air guide pipe 6, one end of the air guide pipe 6 is provided with a fan 5, the other end of the air guide pipe 6 is communicated with the air inlet box 11, the air inlet direction of the air guide pipe 6 is perpendicular to the central line of the steady flow hole 15, air cannot directly enter the steady flow hole 15 after entering the air inlet box 11, and the speed of the air entering the room is reduced.

The controller is also electrically connected with a humidifier, when the humidity sensor continuously detects that the indoor humidity is lower than a preset value for a plurality of times, an electric signal is transmitted to the controller, the controller controls the humidifier to be started, and when the humidity sensor continuously detects that the indoor humidity is higher than the preset value for a plurality of times, the controller closes the humidifier.

Example 2:

a control method of a constant temperature and humidity intelligent laboratory exhaust system comprises the following steps:

step S1: if the laboratory air has harmful gases, the exhaust fan 28, all the fans 5 and the burner 32 are started through the controller, the indoor air is filtered once through the acidic dissolution cavity 22 and the filter cavity 23, then the indoor air enters the hot air box 31, the burner 32 enables the hot air box 31 to generate high temperature, the indoor air in the hot air box 31 is thermally decomposed and then is exhausted, and the process goes to step S2;

step S2: when the temperature sensor detects that the indoor temperature is reduced, an electric signal is transmitted to the controller, the controller controls the fan 5 on the hot air pipe 7 to start, air in the hot air box 31 is conveyed into the air inlet box 11, and then the step S3 is carried out;

step S3: when the fan 5 on the hot air pipe 7 is started for a certain time, the temperature sensor detects that the indoor temperature still does not reach the preset value, and the controller controls the contactor to start the electric heating pipe 4;

step S4: when the humidity sensor continuously detects that the indoor humidity is lower than the preset value for multiple times, an electric signal is transmitted to the controller, the controller controls the humidifier to be started, and when the humidity sensor continuously detects that the indoor humidity is higher than the preset value for multiple times, the controller closes the humidifier.

The model of the controller is S7-200, the model of the temperature sensor is TS105, the model of the humidity sensor is AM2320, and the working principle of the humidity sensor is the prior art and is not detailed here.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the technical scope of the present invention, so that any minor modifications, equivalent changes and modifications made to the above embodiment according to the technical spirit of the present invention are within the technical scope of the present invention.

Claims (7)

1. The utility model provides a constant temperature and humidity intelligence laboratory exhaust system, including the controller, its characterized in that: exhaust system still including all with controller electric connection's stationary flow air inlet unit (1), determine module and air-out filter mechanism (2), stationary flow air inlet unit (1) is including air inlet case (11), all arrange in proper order and the stationary flow air inlet plate (12) that are parallel to each other along the air inlet direction, middle stationary flow board (13) and stationary flow play aerofoil (14), all be provided with a plurality of on stationary flow air inlet plate (12) and stationary flow play aerofoil (14) and be matrix arrangement's steady flow hole (15), steady flow hole (15) are loudspeaker form, and the steady flow hole (15) big head end of stationary flow hole (15) of stationary flow air inlet plate (12) is relative with steady flow hole (15) big head end of stationary flow play aerofoil (14), and the central line of steady flow hole (15) is perpendicular with the place plane of middle stationary flow board (13), and middle stationary flow board (13) are provided with a plurality of while and stationary flow hole (18) that the steady flow hole (15) big head end of stationary flow air inlet plate (12) and steady flow play aerofoil (14) big The detection component comprises a temperature sensor, a humidity sensor and a humidifier which are electrically connected with the controller, the air outlet filtering mechanism (2) comprises a filtering mechanism and a combustion box communicated with the air outlet end of the filtering mechanism, the combustion box is communicated with the air inlet box (11) through a hot air pipe (7), all flow blocking parts (16) are arranged in all via holes (18) of the middle flow stabilizing plate (13), each flow blocking part (16) is a conical face mask, the center line of each flow blocking part (16) is parallel to the center line of each flow stabilizing hole (15), the big end of each flow blocking part (16) faces towards each flow stabilizing hole (15) of the flow stabilizing air inlet plate (12), the big end of each flow blocking part (16) is fixedly connected with the inner wall of each via hole (18) through a plurality of fixing heads (17), and each via hole (18) is of a cylindrical structure, the diameter of the big end of the flow resisting part (16) is smaller than that of the through hole (18).

2. The constant-temperature constant-humidity intelligent laboratory exhaust system according to claim 1, characterized in that: the filtering mechanism comprises a filtering box (21) and an exhaust fan (28) communicated with the air inlet end of the filtering box (21), the filtering box (21) is internally divided into an acidic dissolution cavity (22) and a filtering cavity (23) through a middle partition plate, a wedge plate (24) is arranged right above the acidic dissolution cavity (22) of the filtering box (21), the wedge plate (24) is obliquely arranged towards the filtering cavity (23), the air inlet end of the filtering box (21) is provided with a plurality of air inlet pipes (25), one end of each air inlet pipe (25) is communicated with the exhaust fan (28), the other end of each air inlet pipe (25) penetrates through the wedge plate (24) from top to bottom and extends into the bottom of the acidic dissolution cavity (22), the acidic dissolution cavity (22) is communicated with the filtering cavity (23) through a plurality of connecting pipes (26), the connecting pipe (26) is positioned in the filtering box (21), one end of the connecting pipe (26) penetrates through the middle partition plate and extends to be right below the top end of the bottom of the wedge plate (24), the other end of the connecting pipe (26) extends to the bottom of the filter cavity (23), and the filter box (21) is positioned at the upper half section of the filter box (21) and is communicated with the combustion box through a ventilation pipe (27).

3. The constant-temperature constant-humidity intelligent laboratory exhaust system according to any one of claims 1-2, characterized in that: the combustion box includes exhaust pipe (3), overlaps establishes hot-blast case (31) and combustor (32) outside exhaust pipe (3), outer container and exhaust pipe (3) intercommunication are passed in ventilation pipe (27), and the tip at exhaust pipe (3) is installed in combustor (32), and hot-blast case (31) both ends are all sealed the space between hot-blast case (31) and exhaust pipe (3) through square frame (33).

4. The intelligent laboratory exhaust system with constant temperature and humidity according to any one of claims 1 to 3, characterized in that: the electric heating pipe (4) is arranged in the air inlet box (11), two ends of the hot air pipe (7) are respectively communicated with the hot air box (31) and the air inlet box (11), the fan (5) is installed on the hot air pipe (7), a plurality of air inlet holes (34) are formed in one square frame (33), and the electric heating pipe (4) and the fan (5) are electrically connected with the controller through contactors.

5. The constant-temperature constant-humidity intelligent laboratory exhaust system according to claim 1, characterized in that: the air inlet box (11) is provided with an air guide pipe (6), one end of the air guide pipe (6) is provided with a fan (5), the other end of the air guide pipe (6) is communicated with the air inlet box (11), and the air inlet direction of the air guide pipe (6) is perpendicular to the central line of the flow stabilizing hole (15).

6. The constant-temperature constant-humidity intelligent laboratory exhaust system according to claim 1, characterized in that: the controller is also electrically connected with a humidifier.

7. The control method of the constant-temperature constant-humidity intelligent laboratory exhaust system according to claims 1-6, characterized in that: the method comprises the following steps:

step S1: if the indoor air of the laboratory has harmful gases, starting the exhaust fan (28), all the fans (5) and the burner (32) through the controller, filtering the indoor air once through the acidic dissolution cavity (22) and the filter cavity (23), then enabling the indoor air to enter the hot air box (31), enabling the burner (32) to enable the hot air box (31) to generate high temperature, discharging the indoor air in the hot air box (31) after thermal decomposition, and entering the step S2;

step S2: when the temperature sensor detects that the indoor temperature is reduced, an electric signal is transmitted to the controller, the controller controls the fan (5) on the hot air pipe (7) to start, air in the hot air box (31) is conveyed into the air inlet box (11), and then the step S3 is carried out;

step S3: when the fan (5) on the hot air pipe (7) is started for a certain time, the temperature sensor detects that the indoor temperature still does not reach the preset value, and the controller controls the contactor to start the electric heating pipe (4);

step S4: when the humidity sensor continuously detects that the indoor humidity is lower than the preset value for multiple times, an electric signal is transmitted to the controller, the controller controls the humidifier to be started, and when the humidity sensor continuously detects that the indoor humidity is higher than the preset value for multiple times, the controller closes the humidifier.

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