CN118242756A - Intelligent control device and method for cooperation of limited space ventilation and gas detection - Google Patents

Abstract

The invention discloses a device and a method for cooperatively and intelligently controlling ventilation and gas detection in a limited space. An intelligent control device for cooperation of limited space ventilation and gas detection is erected on an operation site by an operator; the ventilator performs limited space ventilation work; the ventilator performs ventilation to collect a limited space air sample; the sensor detects air pollutants; the ventilator is circulated until the air quality in the limited space reaches the standard. By adopting the device and the method disclosed by the invention, detection and ventilation integrated automation equipment can be realized, personnel supervision errors are reduced, the working efficiency and safety of a closed environment are improved, and the health damage of operators is reduced.

Description

A confined space ventilation and gas detection coordinated intelligent control device and method

Technical Field

The present invention relates to a confined space ventilation system, and in particular to a confined space ventilation and gas detection coordinated intelligent control device and method.

Background technique

Confined space is a closed or partially closed space that is not designed as a fixed workplace. People can enter and work in a space that is prone to accumulation of toxic, harmful, flammable and explosive gases or insufficient oxygen content. Confined space operations are high-risk operations that are prone to poisoning and suffocation accidents. It is not difficult to find out from the analysis of accidents that most accidents are caused by gas hazards. Detection and ventilation are important safeguards for assessing the level of gas hazards, reducing operational risks, and ensuring the safety of operators.

For safety reasons, testing and ventilation are required before operations. Gas detection equipment and ventilation equipment are key protective equipment to ensure the safety of confined space operations.

There are many types of gas detection alarms and ventilation equipment on the market, but detection and ventilation are two different sets of equipment, which require manual operation of a single device, which is time-consuming and laborious. In addition, since a wide variety of equipment needs to be carried during operation, some equipment may be missed when carried to the site. In addition, the opening, closing, and ventilation duration control of current ventilation equipment all require manual operation, and the degree of automation is not high.

In view of this, the present invention is proposed.

Summary of the invention

The purpose of the present invention is to provide a confined space ventilation and gas detection coordinated intelligent control device and method to solve the above-mentioned technical problems existing in the prior art.

The objective of the present invention is achieved through the following technical solutions:

The confined space ventilation and gas detection coordinated intelligent control device of the present invention includes a control system, a ventilation system, a sampling system, a detection system and an alarm system, wherein the detection system and the sampling system are interconnected, and through automatic control, an integrated ventilation and detection equipment is realized.

The method for realizing the collaborative intelligent control of confined space ventilation and gas detection by the above-mentioned confined space ventilation and gas detection comprises the following steps:

The operators set up a confined space ventilation and gas detection collaborative intelligent control device at the work site;

The ventilator is used to ventilate the confined space;

The ventilator is used to extract air to collect air samples in confined spaces;

Sensors detect air pollutants;

The fan operates in a cycle until the air quality in the confined space meets the standard.

Compared with the prior art, the confined space ventilation and gas detection coordinated intelligent control device and method provided by the present invention adopts a multi-system interactive communication mode, and the confined space ventilation and air quality detection work together, so as to optimize the confined space air quality in advance and reduce the health damage of the operators. It solves the problems of laborious carrying equipment and time-consuming operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a flow chart of a method for coordinated intelligent control of ventilation and gas detection in a confined space provided by an embodiment of the present invention.

FIG. 2 is a schematic diagram of a confined space ventilation and gas detection coordinated intelligent control device provided in an embodiment of the present invention.

FIG3 is a schematic diagram of the working structure of the confined space ventilation and gas detection collaborative intelligent control device provided in an embodiment of the present invention.

FIG. 4 is a partial schematic diagram of a sampling system in a confined space ventilation and gas detection collaborative intelligent control device provided in an embodiment of the present invention.

FIG5 is a schematic diagram of the operation process of the confined space ventilation and gas detection collaborative intelligent control device provided by an embodiment of the present invention.

Detailed ways

The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, not all of the embodiments, which does not constitute a limitation of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of the present invention.

First, the terms that may be used in this article are explained as follows:

The term “and/or” means that either or both of them can be realized at the same time. For example, X and/or Y means both “X” or “Y” and “X and Y”.

The terms "include", "comprises", "contains", "has" or other descriptions with similar semantics should be interpreted as non-exclusive inclusion. For example, "including certain technical feature elements (such as raw materials, components, ingredients, carriers, dosage forms, materials, dimensions, parts, components, mechanisms, devices, steps, procedures, methods, reaction conditions, processing conditions, parameters, algorithms, signals, data, products or products, etc.) should be interpreted as including not only certain technical feature elements explicitly listed, but also other technical feature elements known in the art that are not explicitly listed.

The term "consisting of..." means excluding any technical feature elements not explicitly listed. If this term is used in a claim, it will make the claim closed, so that it does not contain technical feature elements other than the technical feature elements explicitly listed, except for the conventional impurities related to them. If this term only appears in a clause of a claim, it only limits the elements explicitly listed in the clause, and the elements recorded in other clauses are not excluded from the overall claim.

Unless otherwise specified or limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example: it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this article can be understood according to specific circumstances.

The orientation or position relationship indicated by terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or position relationship shown in the drawings and are only for the convenience and simplification of description, and do not explicitly or implicitly indicate that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation of this document.

The contents not described in detail in the examples of the present invention belong to the prior art known to professionals in the field. If no specific conditions are specified in the examples of the present invention, the conditions are carried out according to the conventional conditions in the field or the conditions recommended by the manufacturer. If the manufacturers of the reagents or instruments used in the examples of the present invention are not specified, they are all conventional products that can be purchased commercially.

The confined space ventilation and gas detection coordinated intelligent control device of the present invention includes a control system, a ventilation system, a sampling system, a detection system and an alarm system, wherein the detection system and the sampling system are interconnected, and through automatic control, an integrated ventilation and detection equipment is realized.

The ventilation system includes a ventilator, a speed regulator, an air duct and a filter. An independent ventilator and an air duct are used. The speed regulator realizes the function conversion of the ventilator to supply and exhaust air, and the filter filters the supplied air.

The sampling system is connected to the ventilation system through a sampling port located at the air duct mouth, and the air is drawn by the ventilator controlled by a speed regulator to obtain air samples in a limited space. The sampling port, sampling valve, sampling head and vacuum pump in the sampling system are connected at one time, and finally connected to the sensor of the detection system.

The alarm system is used to receive commands from the controller and issue corresponding sound and light reactions and notification information, including an alarm trigger, a sound and light alarm, an alarm notification module and a voice prompter;

The alarm trigger is used to obtain commands from the controller and make other modules of the alarm system respond accordingly. The alarm trigger receives the result of whether the air sample processed by the controller exceeds the operating standard threshold, and converts the result into a command that can be recognized by the sound and light alarm and the voice prompter;

The sound and light alarm executes the command of the alarm trigger, and is composed of two indicator lights and a speaker. According to the command issued by the alarm trigger, a red indicator light and an alarm sound are displayed, or only a green indicator light is lit;

The alarm notification module sends information about whether confined space operations can be performed and detailed air quality parameters to supervisors via a wireless network or a wired network based on the air quality detection results analyzed by the controller.

The voice prompter in the alarm system stores corresponding voice instructions, and issues corresponding voice prompts of "ventilation condition is qualified" or "ventilation condition is unqualified" according to the command of the alarm trigger, so as to facilitate operators to obtain confined space air quality detection information.

The method for realizing the collaborative intelligent control of confined space ventilation and gas detection by the above-mentioned confined space ventilation and gas detection comprises the following steps:

The operators set up a confined space ventilation and gas detection collaborative intelligent control device at the work site;

The ventilator is used to ventilate the confined space;

The ventilator is used to extract air to collect air samples in confined spaces;

Sensors detect air pollutants;

The fan operates in a cycle until the air quality in the confined space meets the standard.

For limited spaces, an independent fan is used to complete the exhaust and air supply operations. The speed and air volume of the fan are changed by a speed regulator to achieve the effect of controlling the supply and exhaust of air.

In summary, the confined space ventilation and gas detection coordinated intelligent control device and method of the embodiment of the present invention adopts a multi-system interactive communication mode, and the confined space ventilation and air quality detection work together to optimize the confined space air quality in advance and reduce the health damage of the operators. It solves the problems of laborious carrying of equipment and time-consuming operation.

In the present invention:

The sensor detects air pollutants. If the air quality meets the standard, the controller displays a green indicator light and stops ventilation. The voice prompter also issues a voice prompt to inform the staff that the ventilation is qualified. If the air quality does not meet the standard, the controller displays a red indicator light and the voice prompter issues a voice prompt to inform the staff that the ventilation is unqualified. The ventilator is automatically started for secondary ventilation. The ventilation work content is the same as the first time.

In the intelligent control device for ventilation and gas detection in confined spaces:

The control system is used by the device users to control the entire device, and also includes the processing and storage of some information data, including the following parts:

The display is used for users to input commands and is the interactive interface between the entire confined space ventilation and gas detection collaborative intelligent control device and the outside world;

The controller is responsible for receiving and executing commands from various systems and processing and analyzing them. It receives front-end commands from the display, controls the operating status and parameters of ventilation equipment, controls the sampling time of the sampling system, receives data collected by sensors, issues corresponding commands after data processing by the information analysis processor, and interconnects with other systems to issue commands, etc.

An information analysis processor is used to receive and analyze the air quality detection data of the detection system and process it into commands that can be recognized by other systems;

The data recording module is used to record the ventilation time, frequency and other data of the confined space as well as the air quality detection status; it can also record the time and location of the alarm module issuing the alarm and the corresponding air quality detection information at the time, so as to facilitate subsequent query, analysis and processing.

The ventilation system is used for ventilation of confined spaces, maintaining good air quality in the working space and reducing health damage to workers. It includes the following parts:

The ventilator is used to complete the ventilation work in a limited space, and includes a ventilator and an air duct. The air supply and exhaust states of the ventilator are controlled by a speed regulator.

The speed regulator is used to control the speed and air volume of the fan. It can adjust the speed of the fan to a suitable position as needed during exhaust and air supply, so that it can achieve the ideal effect during exhaust and air supply. At the same time, the speed regulator also has automatic control and detection functions, which can automatically adjust the speed and air volume of the fan to improve the operating efficiency of the system.

The filter is used to filter particles and dust in the air to ensure the quality of air delivered into the room.

The sampling system is used to collect the enclosed air extracted from the air duct, including the following parts:

The sampling port is located at the connection between the air duct and the ventilator and is used to introduce air samples into the detection equipment;

Sampling valve, controls the opening and closing of the sampling port to reduce sample contamination;

The sampling head connects the sampling port and the vacuum pump to collect pollutants in the air;

A vacuum pump is used to extract air samples from the air duct. The vacuum pump can generate negative pressure to draw the air sample from the sampling head into the sensor.

The detection system is used to detect the confined space air samples obtained by the sampling system and output the monitoring results, including the following parts:

Sensors for detecting the concentration and parameters of various pollutants in air samples in confined spaces, including but not limited to humidity, gas concentration, etc.;

The data acquisition and transmission module is used to collect the air quality parameters obtained by the sensor and transmit them to the controller for data processing;

The alarm system is used to receive commands from the controller and issue corresponding sound and light responses and notification information, including the following parts:

Alarm trigger, used to obtain commands from the controller and make other modules of the alarm system respond accordingly;

Sound and light alarm, a device for emitting light and warning sound, which displays a green indicator light or a red indicator light and an alarm sound according to the trigger signal;

A voice prompter stores corresponding voice commands and issues corresponding voice prompts of "the ventilation status is qualified" or "the ventilation status is unqualified" according to the command of the alarm trigger;

The alarm notification module sends the supervisory personnel the possibility of confined space operations and air quality conditions through a wireless or wired network;

In order to more clearly demonstrate the technical solution and technical effects provided by the present invention, the embodiments of the present invention are described in detail with specific embodiments below.

Example 1

FIG1 is a flow chart of a method for coordinated intelligent control of ventilation and gas detection in a confined space provided by an embodiment of the present invention.

As shown in Figure 1, the method mainly includes the following steps:

Step 1: Operators set up a confined space ventilation and gas detection collaborative intelligent control device at the work site.

In the embodiment of the present invention, the operator sets up the device at the entrance of the confined space and starts the device so as to complete the ventilation work of the confined space before the operator enters the operation.

Step 2: The ventilator is used to ventilate the confined space.

In the embodiment of the present invention, the ventilator is started according to the command of the controller, and the ventilator supplies air. The ventilator is controlled by the speed regulator. When supplying air, the filter screen filters particulate matter and dust in the air to ensure the quality of air delivered into the limited space.

Step 3: Use a ventilator to extract air to collect air samples in the confined space.

In the embodiment of the present invention, after the ventilator completes a ventilation operation in the limited space, the speed regulator controls the ventilator to exhaust air, and the sampling system obtains an air sample of the limited space at the sampling port and sends it to the sensor for detection.

Step 4: The sensor detects air pollutants.

In an embodiment of the present invention, if the air quality meets the standard, the controller displays a green indicator light and stops ventilation, and the voice prompter simultaneously issues a voice prompt to inform the staff that the ventilation is qualified; if the air quality does not meet the standard, the controller displays a red indicator light, and the voice prompter simultaneously issues a voice prompt to inform the staff that the ventilation is unqualified, and automatically starts the ventilator for secondary ventilation, and the ventilation work content is the same as the first time.

Step 5: The fan operates in a cycle until the air quality in the confined space meets the standard.

In the embodiment of the present invention, according to the signal prompt given by the alarm module and the air quality detection result displayed on the display, the device performs a ventilation-detection cycle until the air quality in the limited space reaches the operating standard.

FIG2 is a schematic diagram of a confined space ventilation and gas detection coordinated intelligent control device provided by an embodiment of the present invention.

As shown in Figure 2, a confined space ventilation and gas detection coordinated intelligent control device includes a control system, a ventilation system, a sampling system, a detection system and an alarm system. The control system includes a display, a controller, an information analysis processor and a data recording module, wherein:

The display provides an interactive interface between the user and the control system, including touch screens, physical buttons and other devices. The user can view the working status of each system of a confined space ventilation and gas detection collaborative intelligent control device, set the working time and device parameters of the ventilation system through the display, query the air quality test results, review the previous confined space air quality test data, adjust the equipment working mode, etc. The display can also be used for operations after the alarm system issues an alarm. Supervisors can confirm the alarm information and perform subsequent operations through the display, and can also be used to view previous alarm conditions and processing records.

The controller is used as the main control center of a collaborative intelligent control device for ventilation and gas detection in confined spaces. The instructions issued by the user are transmitted to the controller through the display, and the controller analyzes and processes the commands, and then distributes the commands to other systems. It is also used to receive information that needs to be processed by other systems, such as executing the ventilation system start-up time set by the user, executing the pre-set sampling system sampling time, setting the program of the speed regulator and the air duct solenoid valve, receiving the data collected by the detection system sensor, calling the alarm system to sound an alarm, etc.

The information analysis processor is used to receive and analyze the air quality detection data of the detection system, call the limited space air quality standard parameters stored in the processor, compare them with the air quality parameters detected by the sensor, determine whether various indicators in the air sample exceed the threshold, obtain the result of whether the air quality meets the operation requirements, and transmit the result to the controller; it can also be used to process the display's response information to the alarm information of the alarm system.

The data recording module is used to record the ventilation data and air quality detection conditions of the confined space, so that users can check them through the display, including but not limited to: start time, ventilation duration, sampling time, sampling results, air quality detection results, etc.

The ventilation system is used for ventilation in limited spaces to maintain good air quality in the working space and reduce health damage to workers, including ventilators, air ducts, speed regulators, and filters. Among them:

For a limited space, an independent fan can save more space than installing two fans to complete the ventilation work. The speed and air volume of the fan can be changed by the speed regulator to achieve the effect of controlling the air supply and exhaust status.

The filter is used to filter particulate matter and dust in the air, purify the air quality sent into a limited space, and reduce harmful substances in the air to a certain extent. It is usually installed in the upstream position of the air duct in the air treatment system. It can block tiny particles such as dust, pollen, bacteria, viruses, smoke, etc. in the air, improve the air purification effect, and ensure the quality of air sent into the room.

The sampling system is used to collect the enclosed air extracted from the air duct, and is composed of a sampling port, a sampling valve, a sampling head, and a vacuum pump, including:

The sampling port is used to introduce air samples into the detection equipment. It is located at the connection between the confined space and the air duct. It has a simple shape to reduce air flow resistance and the possibility of pollutant attachment. After the ventilation system completes the ventilation task of the confined space, it will draw air again. The air samples extracted from the confined space will be collected through the sampling system to facilitate the sensor to monitor pollutants.

The sampling valve is used to control the opening and closing of the sampling port to reduce sample contamination.

The sampling head is used to collect pollutants in the extracted air. It is located inside the sampling port and can be made of stainless steel.

A vacuum pump is used to extract air samples from the air duct. The vacuum pump can generate negative pressure to suck the air sample from the sampling head into the sampling container. The vacuum pump will automatically run to extract the air sample. Make sure that the vacuum pump pipeline is tightly connected to the sampling head to avoid leakage to ensure accurate extraction of the air sample.

The detection system is used to detect the confined space air sample obtained by the sampling system and output the monitoring results, including sensors and data acquisition and transmission modules, wherein:

Sensors are used to detect the concentration and parameters of various pollutants in air samples in confined spaces, including but not limited to humidity, gas concentration, etc. The type of sensor to be enabled is set according to the parameters to be observed. The sensor detects the air sample in the sampling container and obtains various data observed in the air sample. Among them, sensor types include but are not limited to: gas sensors, which are used to detect the concentration of various harmful gases in the air, such as carbon monoxide, carbon dioxide, nitrogen oxides, ozone, etc.; temperature and humidity sensors, which measure the humidity and temperature in the air; VOC gas sensors, which specialize in detecting volatile organic compounds, can detect chemical substances present in indoor air, such as formaldehyde, benzene, xylene, ethyl acetate, etc.

The data acquisition and transmission module is used to collect the air quality parameters obtained by the sensor and transmit them to the controller for data processing. In this implementation, the device adopts Ethernet wired transmission. The air sample data information is transmitted from the sensor to the data acquisition and transmission module, and then from the transmission module to the controller for data information processing and command generation.

The alarm system is used to receive commands from the controller and issue corresponding sound and light responses and notification information, including an alarm trigger, a sound and light alarm, an alarm notification module and a voice prompter, wherein:

The alarm trigger is used to obtain commands from the controller and make other modules of the alarm system respond accordingly. The alarm trigger receives the result of whether the air sample processed by the controller exceeds the threshold of the operating standard, and converts the result into a command recognizable by the sound and light alarm, that is, the green indicator light is turned on, sending a signal that the air quality of the confined space meets the operating standard, or the red indicator light is turned on, the sound alarm is sounded, and the signal that the enclosed air quality test does not meet the standard and the operation is prohibited is issued;

The sound and light alarm executes the command of the alarm trigger. It consists of two indicator lights and a speaker. According to the command issued by the alarm trigger, it displays a red indicator light and an alarm sound, or only lights up the green indicator light.

The alarm notification module, based on the air quality test results analyzed by the controller, sends the information on whether confined space operations can be carried out and detailed air quality parameters to supervisors through a wireless or wired network, and sets a confirmation time. If the operation status is not confirmed within the set time period, a notification and alarm will be sent again to avoid operations being carried out without monitoring the air quality of the confined space.

The voice prompter stores corresponding voice instructions and issues corresponding voice prompts of "the ventilation condition is qualified" or "the ventilation condition is unqualified" according to the command of the alarm trigger.

FIG3 is a schematic diagram of the working structure of a confined space ventilation and gas detection collaborative intelligent control device provided by an embodiment of the present invention.

The device is a collaborative intelligent control device for ventilation and gas detection in a confined space, comprising a ventilation duct 1, a ventilator 3, a controller 9 and an alarm and detection system, wherein a speed regulator 2 is located on the ventilator to control the air volume and the air supply and exhaust status of the ventilator, a filter 5 is in the air duct, and fresh air is sent into the confined space through the ventilation duct 1; a sampling port 10 collects air samples after ventilation of the confined space at the air duct port, a sampling valve 11 controls the opening and closing status of the sampling port 10, a vacuum pump 4 is connected to the sampling port 10 through a sampling pipe, and obtains air samples to be sent to a sensor 8 and to perform air quality detection; the air quality detection results are notified to the staff through an audible and visual alarm 6, a voice prompter 7 and a controller; a display is located on the controller 9, and is the entrance for the operator to control the entire device.

FIG4 is a partial schematic diagram of a sampling system in a confined space ventilation and gas detection collaborative intelligent control device provided in an embodiment of the present invention.

The sampling system is composed of a sampling port 10 , a sampling valve 11 , a sampling head 12 and a vacuum pump 4 .

FIG5 is a schematic diagram of the operation process of a confined space ventilation and gas detection collaborative intelligent control device provided by an embodiment of the present invention.

The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims. The information disclosed in the background technology section of this article is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or in any form that the information constitutes prior art known to those skilled in the art.

Claims (7)

1. The utility model provides a limited space ventilation and gaseous detection intelligent control device in coordination which characterized in that, including control system, ventilation system, sampling system, detecting system and alarm system, wherein detecting system and sampling system are intercommunicated, through automated control, realize ventilation detection integration and equip.

2. The intelligent control device for cooperation of ventilation and gas detection in a limited space according to claim 1, wherein the ventilation system comprises a ventilator, a speed regulator, a wind pipe and a filter screen, the function conversion of ventilation of the ventilator is realized by the speed regulator by adopting an independent ventilator and a wind pipe, and the filter screen filters the air supplied by the ventilator.

3. The intelligent control device for cooperation of ventilation and gas detection in a limited space according to claim 1, wherein the sampling system is connected with the ventilation system through a sampling port positioned at the opening of the air duct, the ventilator is controlled by the speed regulator to draw air to obtain an air sample in the limited space, and the sampling port, the sampling valve, the sampling head and the vacuum pump in the sampling system are connected at one time and finally connected with a sensor of the detection system.

4. The intelligent control device for cooperation of limited space ventilation and gas detection according to claim 1, wherein the alarm system is used for receiving the command of the controller and sending out corresponding audible and visual response and notification information, and comprises an alarm trigger, an audible and visual alarm, an alarm notification module and a voice prompt;

The alarm trigger is used for acquiring a command from the controller and enabling other modules of the alarm system to make corresponding reactions, receiving a result of whether an air sample processed by the controller exceeds an operation standard threshold value or not, and converting the result into a command which can be recognized by the audible and visual alarm and the voice prompt;

The audible and visual alarm executes the command of the alarm trigger, consists of two indicator lamps and a loudspeaker, and displays red indicator lamps and alarm sounds according to the command sent by the alarm trigger or only lights the green indicator lamps;

and the alarm notification module sends the limited space operation and detailed air quality parameters to a supervisory person through a wireless network or a wired network according to the air quality detection result analyzed by the controller.

5. The intelligent control device for cooperation of ventilation and gas detection in a limited space according to claim 4, wherein the voice prompter in the alarm system stores corresponding voice instructions, and sends out corresponding voice prompts of qualified ventilation condition or unqualified ventilation condition according to the command of the alarm trigger, so that operators can conveniently obtain limited space air quality detection information.

6. A method for implementing the intelligent control of the ventilation and gas detection coordination of the limited space by the intelligent control device of the ventilation and gas detection coordination of the limited space according to any one of claims 1 to 5, comprising the steps of:

An operator establishes a limited space ventilation and gas detection cooperative intelligent control device on an operation site;

The ventilator performs limited space ventilation work;

The ventilator performs ventilation to collect a limited space air sample;

the sensor detects air pollutants;

the ventilator is circulated until the air quality in the limited space reaches the standard.

7. The intelligent control method for controlling ventilation and air detection in cooperation with a limited space according to claim 6, wherein the ventilation and air supply operation is completed by an independent ventilator for the limited space, and the rotation speed and air quantity of the ventilator are changed by a speed regulator to achieve the effect of controlling ventilation.