CN210280135U

CN210280135U - Laboratory intelligent fume hood without control panel

Info

Publication number: CN210280135U
Application number: CN201921150009.5U
Authority: CN
Inventors: 钟占敖
Original assignee: Wuhan Xintian & P Lab Equipment Co ltd
Current assignee: Wuhan Xintian & P Lab Equipment Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-04-10
Anticipated expiration: 2029-07-22

Abstract

The utility model provides a no control panel's laboratory intelligence fume chamber. The ventilating cabinet comprises a cabinet body, a workbench, an operation window, a ventilating system, an illuminating system, a protective glass door, a glass door lifting mechanism and an intelligent control device, wherein the glass door lifting mechanism comprises a driving device, a balance weight and a synchronous belt assembly, the balance weight is arranged on the rear side of the upper cabinet body, is connected with the protective glass door through the synchronous belt assembly and is driven to lift through the driving device; the intelligent control device comprises a control box and a displacement sensor, the displacement sensor is fixedly installed on the cabinet body, a probe of the displacement sensor is fixed on the balance weight, a signal output end of the displacement sensor is connected with a signal output end of the control box, and a signal output end of the control box is connected with a control end of a main switch of the fume hood, a control end of the driving device and a control end of the lighting system. The utility model discloses need not display screen physics key switch, the high change through the glass door realizes the start and other each working process of the cabinet body, has simplified experimental operation process.

Description

Laboratory intelligent fume hood without control panel

Technical Field

The utility model relates to chemistry experiment room work cabinet specifically is one kind can satisfy chemistry experiment room scientific experiment basic function to can the environmental security of protection test, and do not have control panel's laboratory intelligence fume chamber.

Background introduction

Since chemical reagents used for the test are stored in large quantities in chemical laboratories, harmful substances to the human body are present in the chemical reagents. And the chemical substance can give off harmful gas in the access process or the test process, and the gas is easy to be retained in the laboratory if being not treated properly, and the life safety of laboratory operators can be directly harmed if being retained for a long time. In order for laboratory workers not to inhale or swallow some toxic, pathogenic or non-toxic chemicals and organisms, good ventilation should be provided in the laboratory.

To prevent the absorption of some vapors, gases and particulates (smoke, soot, dust and aerosols), the pollutants must be removed by fume hoods, hoods or local ventilation, so fume hoods are an integral part of the laboratory ventilation design. The fume hood is generally made of all steel, steel wood, all wood, aluminum wood, plastic steel, PVC structure and other materials, is provided with a table top directly contacting with an experimental sample, and is generally made of epoxy resin plates, solid physicochemical plates, stainless steel plates, PVC, ceramics and other materials. When the staff is experimenting, stand or sit before the cabinet, put the glass door as far as possible low, the hand passes through to stretch into under the door and tests in the cabinet, and the exhaust fan is inwards bled through the door of opening, and harmful gas can not spill over in a large number under normal conditions, and the direct vent through the top is got rid of.

The fume chamber on the existing market all needs the physics button to carry out on-off operation, and laboratory staff operation needs just can carry out normal experimental work according to fume chamber display screen master switch, valve switch, lamp switch fume chamber, and its process is loaded down with trivial details and unnecessary, and most buttons of fume chamber display screen are unnecessary moreover, the student does not pay attention to operating specification and safety scheduling problem when experiment.

Disclosure of Invention

The utility model discloses provide a laboratory intelligence fume chamber for having control panel in chemistry experiment room according to current problem and demand, this fume chamber can satisfy design principles such as practicality, scientificity, energy-concerving and environment-protective to can protect chemistry experiment environment safety, reduce the operation degree of difficulty, can ensure that the experimenter operates the experiment under the safety ring border.

The utility model provides a technical scheme: the utility model provides a no control panel's laboratory intelligence fume chamber, includes the upper cabinet body, the lower floor's cabinet body and workstation, the upper cabinet body is equipped with the cavity cabinet body of operation window for the front side, and the workstation top is arranged in to the upper cabinet body, and workstation front side top is arranged in to its operation window to be equipped with the safety glass door in operation window department, be equipped with ventilation system and lighting system at the upper cabinet is internal, be equipped with exhaust pipe, its characterized in that at the top of the upper cabinet body: the laboratory intelligent ventilation cabinet also comprises a glass door lifting mechanism and an intelligent control device, wherein the glass door lifting mechanism comprises a driving device, a balance weight and a synchronous belt component, the driving device is installed at the top of the upper-layer cabinet body, the power output end of the driving device is connected with the power input end of the synchronous belt component, and the balance weight is arranged at the rear side of the upper-layer cabinet body and is connected with the protective glass door through the synchronous belt component; the intelligent control device comprises a control box and a displacement sensor, the displacement sensor is fixedly arranged on the upper-layer cabinet body, a probe of the displacement sensor is fixed on the balance weight, a signal output end of the displacement sensor is connected with a signal output end of the control box, and a signal output end of the control box is connected with a main switch control end of the fume hood, a driving device and a control end of the lighting system; when the protective glass door completely shields the operation window and is in a closed state, the position of the counter weight is an initial position, the main switch of the fume hood is in a closed state at the moment, and the control box controls the main switch of the fume hood to be opened when the protective glass door is pushed upwards to change the position of the counter weight.

The utility model discloses better technical scheme: the ventilation cabinet also comprises a central processing unit, a temperature sensor, a wind speed sensor, a pressure sensor, an infrared sensor and an electric air valve actuator, wherein the temperature sensor, the wind speed sensor, the pressure sensor and the electric air valve actuator are all arranged in the air exhaust pipe, the infrared sensor is arranged on the front side panel of the upper-layer cabinet body, and the control box is respectively connected with the temperature sensor, the wind speed sensor, the pressure sensor, the infrared sensor and the electric air valve actuator through signal lines; and the central processing unit is in communication connection with the control box and transmits signals to an APP (application) or PC (personal computer) end of the mobile phone through the central processing unit.

The utility model discloses better technical scheme: the positions of the upper cabinet body, which correspond to the two sides of the protective glass door, are respectively provided with a slideway, and the two sides of the protective glass door are respectively and correspondingly embedded into the slideways through slide blocks; the two groups of synchronous belt assemblies are symmetrically arranged at the positions, corresponding to the slide ways, of the two sides of the upper-layer cabinet body, each group of synchronous belt assembly comprises a front-side synchronous gear, a rear-side synchronous gear and a synchronous belt, the front-side synchronous gears of the two groups of synchronous belt assemblies are symmetrically arranged on the front side of the top of the upper-layer cabinet body and are connected through a connecting rod, the rear-side synchronous gears of the two groups of synchronous belt assemblies are symmetrically arranged on the front side and the rear side of the top of the upper-layer cabinet body, and one rear-side synchronous gear is connected with a driving; one end of a synchronous belt of each group of synchronous belt components extends into the slide way of the corresponding side and is connected with the protective glass door, the other end of the synchronous belt is connected with the balance weight after winding the front side synchronous gear and the rear side synchronous gear of the corresponding side, and the synchronous belt of each side is meshed with the front side synchronous gear and the rear side synchronous gear of the corresponding side.

The utility model discloses better technical scheme: and the upper middle part of the operation window of the fume hood is provided with a correlation detection sensor which is connected with the control box through a signal wire.

The utility model discloses better technical scheme: and the control box is provided with a display screen, a temperature alarm and a pressure alarm.

The utility model discloses better technical scheme: the synchronous belt is a polyurethane synchronous belt, and a plurality of stainless steel wires are embedded in the synchronous belt; the front side synchronizing gear and the rear side synchronizing gear are both fixedly installed at the top of the cabinet body through the rotating shaft seat.

The utility model discloses better technical scheme: the driving device is a driving motor, and an output shaft of the driving motor is connected with a rotating shaft of one rear side synchronous gear of the synchronous belt assembly.

The utility model discloses the glass door acquiescence has four kinds of states to be shutdown state, operating condition, standby state, dangerous state respectively, and when the glass door was switched into another kind of state by a state, its height will change then influences the face wind speed of fume chamber, and the face wind speed is the important parameter that detects the fume chamber safety, and the national standard is 0.4 MS-0.6 MS. The utility model discloses a wind speed sensor measures fume chamber face wind speed and the cubic number of taking a breath every hour, when the wind speed sensor measured value is less than acquiescence setting value 0.5M/S, can increase electronic blast gate executor opening angle earlier, when blast gate opening angle is the biggest, when the wind speed has not reached 0.5M/S, central processing unit can increase the converter frequency after the calculation and make the increase of fan revolution, if the wind speed sensor measured value is greater than acquiescence setting value 0.5M/S, then on the contrary. The utility model discloses a when temperature sensor and pressure sensor detect to surpass the default setting value in the fume chamber, will show temperature alarm and pressure alarm in controller and central processing unit display screen. The utility model discloses can also revise acquiescent parameter in the control box, protective glass door stop height, during operating condition protective glass door stop height, danger state protective glass door stop height, temperature setting value, pressure setting value, wind speed setting value, the bright value of opening of lamp (the lamp is opened when protective glass door opens many heights) when if standby state.

The utility model has the advantages that:

(1) the main switch of the utility model is controlled by the displacement sensor, and only needs to gently lift up the power-assisted glass cabinet door, and the displacement sensor detects the height change of the counterweight, so as to control the ventilation cabinet to enter a working state (turning on the lamp, opening the corresponding frequency of the fan, monitoring the temperature, monitoring the pressure, monitoring the height and monitoring the wind speed, and simultaneously starting), thereby facilitating the practical, humanized and simple operation of experimenters;

(2) the utility model discloses but the fume chamber is detecting that automatic entering standby state, protective glass door 4 can send the warning suggestion in dangerous state under the unmanned state, and help laboratory personnel standardize safe operation and strengthen energy-concerving and environment-protective consciousness.

(3) The utility model discloses fume chamber accessible height monitoring, wind speed monitoring come adjusting valve angle and fan rotational speed to ensure that the constant wind speed is guaranteed to the cover glass door face wind speed, do not receive the cover glass door to reciprocate and influence a stable wind speed, make laboratory staff operation test under a safety ring border.

The utility model discloses need not display screen physics key switch, only need gently upwards helping hand protective glass door after, when displacement sensor sensed the change in height of counter weight, the control box just can control protective glass door and rise to operating condition automatically, solved the laboratory to the loaded down with trivial details operation in the chemical test process and the experimental personnel nonstandard operating problem, the automatic control of multiple different states simultaneously can ensure that the experimental personnel operate the test under a safety environment again; the design principles of practicability, scientificity, energy conservation, environmental protection and the like are met in a chemical laboratory, and the environmental safety of chemical experiments can be protected.

Drawings

FIG. 1 is a control schematic diagram of the present invention;

FIG. 2 is a schematic view of the structure of the ventilation cabinet body of the present invention;

FIG. 3 is a schematic view of the internal structure of the fume hood of the present invention;

fig. 4 is a rear view of the cabinet body of the fume hood of the present invention;

fig. 5 is a schematic structural view of the synchronous belt assembly of the present invention;

fig. 6 is a control schematic of a plurality of fumehoods.

In the figure: 1-upper cabinet body, 1-slideway, 1-2-operation window, 3-workbench, 4-protective glass door, 4-1-slide block, 5-driving device, 6-synchronous belt component, 6-1-front side synchronous gear, 6-2-rear side synchronous gear, 6-3-synchronous belt, 6-4-connecting rod, 7-counterweight, 8-control box, 9-displacement sensor, 10-temperature sensor, 11-wind speed sensor, 12-pressure sensor, 13-infrared sensor, 14-exhaust pipe, 15-lighting system, 16-central processor, 17-correlation detection sensor and 18-electric wind valve actuator.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. Fig. 1 to 5 are drawings of the embodiment, which are drawn in a simplified manner and are only used for clearly and concisely illustrating the purpose of the embodiment of the present invention. The following detailed description of the embodiments of the present invention is presented in the drawings and is not intended to limit the scope of the invention as claimed. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally placed when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, and are merely for convenience of description of the present invention and simplifying the description, but do not indicate or imply that the device or element that is referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless explicitly stated or limited otherwise, the terms "disposed" and "connected" are to be interpreted broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; the connection may be direct or indirect via an intermediate medium, and may be a communication between the two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

The embodiment provides a laboratory intelligence fume chamber of no control panel, as shown in fig. 1 and fig. 2, including the upper cabinet body 1, the lower floor cabinet body 2 and workstation 3, separate into a plurality of lockers through a plurality of baffles in the lower floor cabinet body 2, every locker is equipped with the cabinet door alone, workstation 3 places in the top of the lower floor cabinet body 2, the upper cabinet body 1-2 is the open-front side's of the cavity cabinet body of constituteing by left side baffle, right side baffle, rear baffle and roof, is equipped with the cover body on the upper portion of opening the face, and its lower part forms operation window 1-2, is equipped with protective glass door 4 that can upgrade in operation window 1-2 department. Be equipped with ventilation system and lighting system 15 in the upper cabinet body 2, ventilation system and lighting system of fume chamber all are the same with current fume chamber, ventilation system's air exhauster setting is outdoor, the air exit has been seted up at the top of the upper cabinet body 2, and communicate with outdoor air exhauster through exhaust pipe 14, ventilation system still includes new fan, the air intake that sets up on the 1 rear side baffle of the upper cabinet body and the guide plate of setting in the operation cavity, a plurality of wind gaps have been seted up on the guide plate, realize the air inlet in the fume chamber and the process of airing exhaust through ventilation system.

The laboratory intelligent fume hood without the control panel provided in the embodiment is shown in fig. 1 to 4, and further comprises a glass door lifting mechanism and an intelligent control device. Glass door elevating system includes drive arrangement 5, counter weight 7 and hold-in range subassembly 6, drive arrangement 5 is driving motor, installs at the top of upper cabinet body 1, and the rear side of upper cabinet body 1 is arranged in to counter weight 7. The synchronous belt assemblies 6 are provided with two groups, as shown in fig. 5, each group of synchronous belt assemblies 6 comprises a front synchronous gear 6-1, a rear synchronous gear 6-2 and a synchronous belt 6-3, the front synchronous gears 6-1 of the two groups of synchronous belt assemblies 6 are symmetrically arranged on the front side of the top of the upper-layer cabinet body 1 and are connected through a connecting rod 6-4, the rear synchronous gears 6-2 of the two groups of synchronous belt assemblies 6 are symmetrically arranged on the front side and the rear side of the top of the upper-layer cabinet body 1, one rear synchronous gear 6-2 is connected with the driving device 5 and is driven by the driving device 5 to rotate. The positions of the upper-layer cabinet body 1 corresponding to the two sides of the protective glass door 4 are respectively provided with a slideway 1-1, and the two sides of the protective glass door 4 are respectively correspondingly embedded into the slideways 1-1 through a sliding block 4-1; two groups of synchronous belt assemblies 6 are symmetrically arranged at the positions, corresponding to the slide ways 1-1, on the two sides of the upper-layer cabinet body 1, one end of a synchronous belt 6-3 of each group of synchronous belt assemblies 6 extends into the slide way 1-1 correspondingly measured and is connected with the protective glass door 4, the other end of the synchronous belt 6-3 of each group of synchronous belt assemblies is connected with a balance weight 7 after winding around the front side synchronous gear 6-1 and the rear side synchronous gear 6-2 of the corresponding side, and the synchronous belt 6-3 of each side is meshed with the front side synchronous gear 6-1 and the rear side synchronous gear 6-2 of the corresponding side.

The synchronous belt 6-3 is a polyurethane synchronous belt, a plurality of stainless steel wires are embedded in the synchronous belt, the front side synchronous gear 6-1 and the rear side synchronous gear 6-2 are fixedly arranged at the top of the cabinet body through a rotating shaft seat, and the four synchronous gears 6-1 can synchronously rotate. The utility model provides a hold-in range 6-3 has certain hardness, and two front side synchronizing gear 6-1 link as an organic whole through connecting rod 6-4, and when upwards promoting glass, its hold-in range 6-3 can drive four synchronizing gear and rotate simultaneously, realizes the displacement of counter weight 7.

In the embodiment, as shown in fig. 1 to 4, the intelligent control device includes a control box 8, a displacement sensor 9, a central processing unit 16, a temperature sensor 10, an air velocity sensor 11, a pressure sensor 12, an infrared sensor 13, an electric air valve actuator 18, and a correlation detection sensor 17, and the correlation detection sensor 17 is an infrared correlation or laser correlation sensor. The displacement sensor 9 is fixedly arranged on the upper-layer cabinet body 2, a probe of the displacement sensor is fixed on the counterweight 7, and the correlation detection sensor 17 is arranged at the middle upper part of an operation window of the fume hood; the temperature sensor 10, the wind speed sensor 11, the pressure sensor 12 and the electric air valve actuator 18 are all installed in the air exhaust pipe, the signal output end of the displacement sensor 9 is connected with the signal output end of the control box 8, and the signal output end of the control box 8 is connected with the control end of a main switch of the fume hood, the driving device 5, the control end of a fan of a ventilation system, the lighting system 15 and the control ends of all the sensors. Central processing unit 16 and control box 8 communication connection, central processing unit 16's signal output part is connected with the signal input part of cell-phone APP or PC end. When the protective glass door 4 completely shelters from the operation window and is in the closed state, the position of the counter weight 7 is the initial position, the main switch of the fume hood is in the closed state, and when the protective glass door 4 is upwards pushed to change the position of the counter weight 7, the main switch of the fume hood is controlled to be opened by the control box 8, meanwhile, all sensors, the electric air valve actuator 18, the driving device 5 and the fan of the ventilation system are all electrified to prepare for work, meanwhile, the control box 8 transmits the collected cabinet door height signal to the central processing unit 16, the frequency of the frequency converter is increased after the central processing unit 16 performs data calculation, so that the revolution number of the fan is increased, meanwhile, the central processing unit 16 can transmit various signals such as temperature and pressure to the APP or PC end of the mobile phone, and display and alarm. A display screen, a temperature alarm and a pressure alarm can be arranged on the control box 8 or the central processor 16 to display and alarm the temperature, the pressure, the surface wind speed, the height of the protective glass door and the lighting state.

The utility model discloses a fume chamber defaults to have four kinds of states, shutdown state, operating condition, standby state, dangerous state, and the cabinet door height, temperature, pressure and the wind speed of four kinds of states all can be set for in advance. The utility model discloses in operation, the change of each state is by 4 high decisions on the safety glass door, then gets into corresponding state when opening 4 high on corresponding safety glass door, as shown in fig. 1, corresponding state can be transmitted to control box 8 by each sensor, is transmitted to central processing unit 16 by control box 8 through RS485 network communication. When the protective glass door 4 is switched from one state to another state, the height of the protective glass door 4 changes, and the surface wind speed of the fume hood is influenced, is an important parameter for detecting the safety of the fume hood, and has the national standard of 0.4M/S-0.6M/S. Therefore the utility model discloses in be equipped with wind speed sensor 11 and measure fume chamber face wind speed and the cubic number of taking a breath of every hour, when 11 measured values of wind speed sensor are less than default setting value 0.5M S, can increase electronic blast gate executor 18 opening angle earlier, when blast gate opening angle is the biggest, the wind speed has not reached when 0.5M S yet, central processing unit 16 can increase the converter frequency after calculating and make the increase of fan revolution, if the wind speed sensor measured value is greater than when default setting value 0.5M S, then vice versa. The utility model discloses when temperature sensor 10 and pressure sensor 12 detected to surpass the default setting value in the well fume chamber, will show temperature warning and pressure warning in control box 8 and central processing unit 16's display screen.

The present invention will be further explained below with reference to the specific operation process of four different states, in which the change process is as follows:

when the protective glass door 4 is in a closed state, after the protective glass door 4 is slightly assisted upwards by laboratory personnel, the displacement sensor 9 transmits a displacement signal to the control box 8, the control box 8 controls the driving device 5 to start working, the protective glass door 4 automatically rises to the height of a working state, all sensors on the ventilation cabinet start working at the moment, the control box 8 transmits the height signal of the protective glass door 4 in the working state to the central processor 16 at the same time, the central processor 16 feeds back the corresponding frequency and rotating speed signal of the fan in the working state to the control box 8, and the control box 8 controls the opening and closing angle of the electric air valve actuator 18 to enable the fan to open the corresponding frequency and rotating speed.

There are two situations when the safety glass door 4 is in operation: (1) if the experimenter leaves the work area or after the experimenter gently helping hand protective glass door 4 downwards, infrared inductor 13 does not have staff or displacement sensor 9 to sense before the cabinet body when the cabinet door appears the altitude variation, all can give control box 8 with the signal transmission, control box 8 just can control drive arrangement 5 and begin work, descend protective glass door 4 to standby state, control box 8 can give central processing unit 16 glass door height signal transmission under the standby state simultaneously, central processing unit 16 just can feed back control box 8 with the corresponding frequency rotational speed signal of the fan under the standby state, thereby reduce the volume of airing exhaust by the angle that opens and shuts of control box 8 control electronic blast gate executor 18, ensure energy-concerving and environment-protective. (2) If there is the main equipment to shelve when the fume chamber in the experimentation, the experimenter makes progress helping hand protective glass door 4 back gently, displacement sensor 9 senses when the cabinet door altitude variation appears, all can give control box 8 with signal transmission, control box 8 just can control drive arrangement 5 and begin work, rise protective glass door 4 to dangerous state automatically, control box 8 gives central processing unit 16 with the glass door altitude signal under the dangerous state this moment, central processing unit 16 just can feed back control box 8 with the corresponding frequency rotational speed signal of fan under the dangerous state, by the angle that opens and shuts of control box 8 control electronic blast gate executor 18, thereby the increase of the volume of airing exhaust realizes that the steady surface wind speed ensures that the experimenter is operation test under a safety ring border.

There are two situations when the cover glass door 4 is in a dangerous state: (1) after the experimenter gently assists the protective glass door 4 downwards, when the displacement sensor 9 senses that the height of the cabinet door changes, signals are transmitted to the control box 8, the control box 8 controls the driving device 5 to start working, the protective glass door 4 is automatically lowered to a working state, and all functions return to the working state; (2) if the experimenter leaves the work area, infrared inductor 13 senses nobody in front of the cabinet, just can give control box 8 with signal transmission, control box 8 control protective glass door 4 is automatic to be fallen to standby state, control box 8 gives central processing unit 16 with glass door height signal transmission under the standby state this moment, central processing unit 16 just can feed back control box 8 with fan corresponding frequency rotational speed signal under the standby state, the angle of opening and shutting of 18 electronic blast gate executor of control box 8 control reduces the volume of airing exhaust and ensures energy-concerving and environment-protective.

The utility model discloses in concrete working process, when its cover glass door 4 was higher than standby state door height, if correlation detection sensor 17 detected the barrier when, just with signal transmission for control box 8, control box 8 just can control cover glass door 4 stop work, shows the barrier simultaneously and reports to the police in control box 8 and central processing unit 16's display screen, and the barrier is clear away back cover glass door 4 and will be resumeed the last step action. When the displacement sensor 9 detects that the safety glass door 4 is in a dangerous state, a height alarm will be displayed in the display screens of the control box 8 and the central processor 16.

When experimenters have other requirements on the default set value of the fume hood, the default parameters can be modified in the controller, such as the stop height of the protective glass door 4 in a standby state, the stop height of the protective glass door 4 in a working state, the stop height of the protective glass door 4 in a dangerous state, a temperature set value, a pressure set value, a wind speed set value and a lamp on-off value (how high the protective glass door 4 is on the lamp).

The above description is only one embodiment of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides a laboratory intelligence fume chamber of no control panel, includes upper cabinet body (1), the lower floor's cabinet body (2) and workstation (3), the cavity cabinet body that upper cabinet body (1) was equipped with operating window (1-2) for the front side, workstation (3) top is arranged in to upper cabinet body (1), and workstation (3) front side top is arranged in to its operating window to be equipped with protective glass door (4) in operating window department, be equipped with ventilation system and lighting system (15) in the upper cabinet body (1), be equipped with exhaust pipe (14) at the top of the upper cabinet body (1), its characterized in that: the laboratory intelligent ventilation cabinet also comprises a glass door lifting mechanism and an intelligent control device, wherein the glass door lifting mechanism comprises a driving device (5), a balance weight (7) and a synchronous belt assembly (6), the driving device (5) is installed at the top of the upper-layer cabinet body (1), the power output end of the driving device is connected with the power input end of the synchronous belt assembly (6), and the balance weight (7) is arranged on the rear side of the upper-layer cabinet body (1) and is connected with the protective glass door (4) through the synchronous belt assembly (6); the intelligent control device comprises a control box (8) and a displacement sensor (9), wherein the displacement sensor (9) is fixedly arranged on the upper-layer cabinet body (1), a probe of the displacement sensor is fixed on a balance weight (7), a signal output end of the displacement sensor (9) is connected with a signal output end of the control box (8), and a signal output end of the control box (8) is connected with a main switch control end of the fume hood, a driving device (5) and a control end of an illumination system (15); when the protective glass door (4) completely shields the operation window and is in a closed state, the position of the counterweight (7) is an initial position, the main switch of the ventilation cabinet is in a closed state at the moment, and when the protective glass door (4) is pushed upwards to change the position of the counterweight (7), the control box (8) controls the main switch of the ventilation cabinet to be opened.

2. The control panel-less laboratory intelligent fumehood of claim 1, wherein: the ventilating cabinet further comprises a central processing unit (16), a temperature sensor (10), a wind speed sensor (11), a pressure sensor (12), an infrared sensor (13) and an electric air valve actuator (18), wherein the temperature sensor (10), the wind speed sensor (11), the pressure sensor (12) and the electric air valve actuator (18) are all arranged in an exhaust pipe (14), the infrared sensor (13) is arranged on a front side panel of the upper cabinet body (1), and the control box (8) is respectively connected with the temperature sensor (10), the wind speed sensor (11), the pressure sensor (12), the infrared sensor (13) and the electric air valve actuator (18) through signal lines; the central processing unit (16) is in communication connection with the control box (8) and transmits signals to an APP or PC end of the mobile phone through the central processing unit (16).

3. The control panel-less laboratory intelligent fumehood of claim 1, wherein: the positions of the upper-layer cabinet body (1) corresponding to the two sides of the protective glass door (4) are respectively provided with a slideway (1-1), and the two sides of the protective glass door (4) are respectively and correspondingly embedded into the slideways (1-1) through sliding blocks (4-1); the two groups of synchronous belt assemblies (6) are symmetrically arranged at positions corresponding to the slide ways (1-1) on two sides of the upper-layer cabinet body (1), each group of synchronous belt assembly (6) comprises a front-side synchronous gear (6-1), a rear-side synchronous gear (6-2) and a synchronous belt (6-3), the front-side synchronous gears (6-1) of the two groups of synchronous belt assemblies (6) are symmetrically arranged on the front side of the top of the upper-layer cabinet body (1) and are connected through connecting rods (6-4), the rear-side synchronous gears (6-2) of the two groups of synchronous belt assemblies (6) are symmetrically arranged on the front side and the rear side of the top of the upper-layer cabinet body (1), and one rear-side synchronous gear (6-2) is connected with a driving device (5) and driven to rotate by the driving device (5; one end of a synchronous belt (6-3) of each group of synchronous belt components (6) extends into the slide way (1-1) correspondingly measured and is connected with the protective glass door (4), the other end of the synchronous belt winds around the front side synchronous gear (6-1) and the rear side synchronous gear (6-2) of the corresponding side and then is connected with the balance weight (7), and the synchronous belt (6-3) of each side is meshed with the front side synchronous gear (6-1) and the rear side synchronous gear (6-2) of the corresponding side.

4. The control panel-less laboratory intelligent fumehood of claim 1 or 2, wherein: a correlation detection sensor (17) is installed at the middle upper part of an operation window of the fume hood, and the correlation detection sensor (17) is connected with the control box (8) through a signal line.

5. The control panel-less laboratory intelligent fumehood of claim 2, wherein: and a display screen, a temperature alarm and a pressure alarm are arranged on the control box (8).

6. The control panel-less laboratory intelligent fumehood of claim 3, wherein: the synchronous belt (6-3) is a polyurethane synchronous belt, and a plurality of stainless steel wires are embedded in the polyurethane synchronous belt; the front side synchronous gear (6-1) and the rear side synchronous gear (6-2) are fixedly arranged at the top of the cabinet body through the rotating shaft seat.

7. The control panel-less laboratory intelligent fumehood of claim 3, wherein: the driving device (5) is a driving motor, and an output shaft of the driving motor is connected with a rotating shaft of one rear side synchronous gear (6-2) of the synchronous belt assembly (6).