Gas monitoring integrated air suction and exhaust integrated device

Abstract

The utility model relates to the field of fans, in particular to a gas monitoring integrated air suction and exhaust integrated device which comprises a fan body and a gas detector, a quick connector is arranged on the gas detector, a quick connector is arranged on the side wall of one side of the fan body, and the quick connector is used for being inserted into the quick connector. The gas detector is used for detecting gas in a limited space, a detection piece for detecting the gas in the limited space is arranged in the gas detector, the detection piece is electrically connected with a control module, and the control module is electrically connected with a display screen. The detection piece is used for detecting gas component data in gas in the limited space, and the display screen is used for displaying the gas component data. A gas detection device does not need to be carried independently, the detector is connected with the host, and endurance is integrated.

Description

Technical Field

[0001] The present application relates to the field of fans, and in particular to a gas monitoring and integrated exhaust and extraction device. Background Art

[0002] Power systems often maintain underground lines or facilities. Due to the confined underground space, rainwater accumulation, and corrosion from debris, harmful gases such as carbon monoxide, combustible gases, and hydrogen sulfide are easily generated. When power workers perform maintenance work in underground confined spaces, State Grid documents require that when performing confined space operations, a process of ventilation, testing, and finally operation must be carried out. The current method used by power workers is to carry an exhaust device, quickly connect the ventilation pipe on site, and then find a mains power source to power the exhaust fan. After a period of time, they remove the gas detection device they carry, which also needs to be connected to the mains power supply to detect the environment in the confined space and observe whether the gas meets the standards. If it does, they can carry out safe maintenance work in the confined space.

[0003] Regarding the above-mentioned related technologies, the currently widely used separate equipment configuration not only increases the operation preparation time, but also makes the overall operation cumbersome. At the same time, purchasing and carrying two different types of equipment separately also increases the physical burden of the work. Utility Model Content

[0004] In order to eliminate the need to carry a gas detection device independently and to avoid worrying about the battery life of the detector, the detector is connected to the host and has an integrated battery life. This application provides a gas monitoring integrated exhaust and ventilation device.

[0005] This application provides a gas monitoring integrated ventilation and exhaust device, which adopts the following technical solutions:

[0006] A gas monitoring integrated exhaust and extraction device includes a fan body and a gas detector. The gas detector is provided with a quick connector, and a quick interface is provided on a side wall of the fan body. The quick connector is used to be inserted into the quick interface. The gas detector is used to detect gas in a confined space. The gas detector is provided with a detection component for detecting gas in a confined space. The detection component is electrically connected to a control module, and the control module is electrically connected to a display screen. The detection component is used to detect gas composition data in the gas in the confined space, and the display screen is used to display the gas composition data.

[0007] By adopting the above technical solution, the fan body is connected to the gas detector through quick connectors and quick interfaces, realizing data sharing and battery life. There is no need to carry the gas detection device independently, and there is no need to worry about the battery life of the detector. In addition, the detection component in the gas detector detects the gas in the limited space in real time, and the display screen displays the detection results in real time.

[0008] Preferably, the gas detector includes a main body, an active suction air pump, a gas detection inner cavity, an air inlet and an air outlet. The active suction air pump and the gas detection inner cavity are arranged in the main body, and the air inlet and the air outlet are exposed at the top of the main body. The active suction air pump is used to suck external gas into the gas detection inner cavity. The detection element is arranged in the gas detection inner cavity, and the external gas in the gas detection inner cavity is discharged from the gas detection inner cavity through the air outlet.

[0009] By adopting the above technical solution, the gas passes through the air inlet and is sucked into the gas detection cavity by the active suction air pump for gas detection. After the detection, the gas is discharged from the air outlet, forming a gas flow cycle. The pump-suction structure and the gas detection cavity closed chamber detection environment have high detection efficiency.

[0010] Preferably, the detection component includes four gas sensors, which are distributed in a rectangular shape in the gas detection inner cavity, and the four gas sensors are used to detect hydrogen sulfide, carbon monoxide, combustible gas and oxygen, respectively.

[0011] By adopting the above technical solution, four gas sensors can respectively detect the components of hydrogen sulfide, carbon monoxide, combustible gas and oxygen in the gas in real time, making it easy to observe whether the gas in the confined space environment meets the standards. Only if it meets the standards can safety maintenance operations in the confined space be carried out.

[0012] Preferably, a humidity and temperature detection module is provided on the main body, and the humidity and temperature detection module is connected to the control module. The humidity and temperature detection module is used to detect the humidity and temperature in a limited space and output a humidity and temperature signal. The control module is used to receive the humidity and temperature signal and control the display screen to display the humidity and temperature in the limited space.

[0013] By adopting the above technical solution, the combination of the humidity and temperature detection module and the control module can achieve efficient and accurate monitoring and management of temperature and humidity in a limited space. Operators can easily view environmental data, detect abnormal situations in time and take measures to improve work efficiency.

[0014] Preferably, an audible and visual alarm is provided on the main body, and the audible and visual alarm is connected to the control module. The detection component is used to detect the gas composition data in the gas in the limited space and output a detection signal. The control module is used to receive the detection signal and control the audible and visual alarm to alarm when the corresponding component content is not within the set range.

[0015] By adopting this technical solution, when the gas content is detected to be outside the set range, the control module automatically controls the sound and light alarm to issue an alarm signal. The rapid and clear sound and light alarm can attract the attention of personnel, prompting them to quickly take necessary safety measures (such as evacuation, ventilation, rescue, etc.).

[0016] Preferably, it also includes an RS485 communication circuit, a main control module is provided in the fan body, the RS485 communication circuit includes a first chip, a fifth switch component and a sixth switch component, the control module includes an MCU chip, the fourth pin of the MCU chip is connected to the power supply circuit, the first pin and the second pin of the MCU chip are respectively connected to the two input ends of the RS485 communication circuit, the two input ends of the RS485 communication circuit are respectively connected to the control end of the fifth switch component and the input end of the sixth switch component, the output end of the fifth switch component and the output end of the sixth switch component are respectively connected to the two input pins of the first chip, the input end of the fifth switch component and the control end of the sixth switch component are both connected to the power supply circuit, the output pin of the first chip is used to be connected to the input end of the main control module, and the output end of the main control module is connected to the display screen.

[0017] By adopting the above technical solutions, RS485 can effectively reduce electromagnetic interference in industrial environments, improve the stability of data transmission, and ensure the accurate transmission of real-time monitoring and control information.

[0018] Preferably, it also includes an alarm circuit, which includes an alarm interface and a fourth switch component. The alarm interface is electrically connected to the sound and light alarm, the first pin of the alarm interface is connected to the power supply circuit, the second pin of the alarm interface is connected to the input end of the fourth switch component, the output end of the fourth switch component is grounded, and the control end of the fourth switch component is connected to the third pin of the MCU chip.

[0019] By adopting the above technical solution, the state of the alarm (on or off) can be accurately controlled according to the control signal of the MCU chip. Through the fourth switch element, the MCU is effectively isolated from the power supply circuit of the alarm, protecting the MCU from high current or high voltage.

[0020] Preferably, the four input pins of the MCU chip are connected to four gas sensors respectively.

[0021] By adopting the above technical solution, the connection between the MCU chip and the four gas sensors is realized, and the connection of the detection signals is realized.

[0022] Preferably, it also includes an air pump control circuit, the input end of the air pump control circuit is connected to the seventh pin of the MCU chip, the air pump control circuit includes an air pump connection interface and a third switch element, the output end of the air pump connection interface is electrically connected to the active suction air pump, the first interface of the air pump connection interface is connected to the input end of the third switch element, the second interface of the air pump connection interface is connected to the power supply circuit, the control end of the third switch element is connected to the input end of the air pump control circuit, and the output end of the third switch element is grounded.

[0023] By adopting this technical solution, the MCU can make real-time decisions based on system status and sensor input to control the air pump's on and off state, achieving intelligent operation. Programs can be written to flexibly adjust the air pump's operating mode and operating hours based on different needs.

[0024] Preferably, the power supply circuit is connected to a power supply, and two output terminals of the power supply circuit are used to provide 3.3V and 5V respectively.

[0025] By adopting the above technical solution, 3.3V and 5V power outputs are provided to meet the voltage requirements of different devices and components.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The fan body is wired to the gas detector through a quick connector and a quick interface, realizing data sharing and battery life integration. There is no need to carry a separate gas detection device and worry about the detector's battery life. In addition, the detection element in the gas detector detects the gas in the confined space in real time, and the display screen shows the detection results in real time.

[0028] 2. Gas passes through the air inlet and is sucked into the gas detection cavity by the active air suction pump for gas detection. After detection, it is discharged from the air outlet, forming a gas flow cycle. The pump-suction structure and the gas detection cavity closed chamber detection environment have high detection efficiency;

[0029] 3. Four gas sensors respectively detect the components of hydrogen sulfide, carbon monoxide, combustible gas and oxygen in the gas in real time, making it easy to observe whether the gas in the confined space environment meets the standards. Only if the standards are met can safety maintenance operations in the confined space be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of this application;

[0031] Figure 2is a schematic diagram of the gas detector in this application;

[0032] Figure 3 is a schematic cross-sectional view of the gas detector in this application;

[0033] Figure 4 It is an exploded schematic diagram of a part of the structure of the present application;

[0034] Figure 5 It is a cross-sectional schematic diagram of a part of the structure of the present application;

[0035] Figure 6 It is a partial structural diagram of this application;

[0036] Figure 7 yes Figure 1 A partial enlarged schematic diagram of part A;

[0037] Figure 8 It is a circuit diagram of the control module in this application.

[0038] Figure 9 It is a circuit diagram of the RS485 communication circuit in this application.

[0039] Figure 10 It is a circuit diagram of the alarm circuit in this application.

[0040] Figure 11 Schematic diagram of the air pump control circuit in this application.

[0041] Figure 12 Schematic diagram of the power supply circuit in this application.

[0042] Figure 13 It is a circuit diagram of the universal gas collection circuit in this application.

[0043] Explanation of reference numerals: 110, fan body; 111, quick connector; 112, handle; 120, air duct; 121, limit block; 122, limit channel; 123, L-shaped clamping groove; 124, convex ring; 125, positioning groove; 130, gas detector; 131, main body; 132, active suction air pump; 133, gas detection cavity; 134, air inlet; 135, air outlet; 136, quick connector; 137, sound and light alarm; 138, temperature and humidity module external probe; 139, plastic protection Protective cover; 140, gas sensor; 150, air duct; 151, limiting matching block; 152, avoidance groove; 153, snap-in block; 154, elastic part; 155, positioning groove; 160, elastic positioning member; 161, positioning convex ball; 162, return spring; 170, support frame; 171, placement platform; 172, support leg; 173, universal wheel; 180, rotating connector; 181, pneumatic gripper; 182, rotating shaft; 183, connecting rod; 184, magnetic block; 190, driving member. DETAILED DESCRIPTION

[0044] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0045] The embodiment of the present application discloses a gas monitoring integrated exhaust and extraction device. Figure 1 The vent 120 is connected to the fan body 110 so that the fan can move freely, and the vent 120 is connected to the fan body 110 so that the fan can move freely.

[0046] refer to Figure 1-Figure 3 A quick connector 136 is provided on the gas detector 130, and a quick interface 111 is provided on the side wall of the fan body 110. The quick connector 136 is used to be inserted into the quick interface 111. The gas detector 130 is inserted into the quick interface 111 on the fan body 110 through the quick connector 136 to achieve power connection and data connectivity. There is no need to carry a gas detection device independently, and there is no need to worry about the battery life of the detector. The gas detector 130 and the fan body 110 are connected by wire, and the battery life is integrated to ensure safety and reliability.

[0047] Specifically, the gas detector 130 includes a main body 131, an active suction air pump 132, a gas detection inner cavity 133, an air inlet 134 and an air outlet 135. In this embodiment, the main body 131 is an aluminum shell, which is metal explosion-proof, has good air tightness, is moisture-proof and liquid splash-proof, and the active suction air pump 132 and the gas detection inner cavity 133 are arranged in the main body 131. The air inlet 134 and the air outlet 135 are both silicone pipes. The air inlet 134 and the air outlet 135 are exposed at the top of the main body 131. The main body 131 The top and bottom are both covered with a plastic protective cover 139; the active suction air pump 132 is used to suck external gas into the gas detection cavity 133, and a detection component is provided in the gas detection cavity 133. The detection component is used to detect the external gas inhaled into the gas detection cavity 133. The detection component includes four gas sensors 140. The four gas sensors 140 are distributed in a rectangular shape in the gas detection cavity 133. The four gas sensors 140 are used to detect hydrogen sulfide, carbon monoxide, combustible gas and oxygen, respectively.

[0048] The gas passes through the air inlet 134 and is sucked into the gas detection cavity 133 by the active air suction pump 132 for gas detection. The four gas sensors 140 respectively detect the components of hydrogen sulfide, carbon monoxide, combustible gas and oxygen in the gas in real time and then discharge them from the air outlet 135, forming a gas flow cycle. The pump-suction structure and the closed chamber detection environment of the gas detection cavity 133 have high detection efficiency.

[0049] In addition, a control module is provided in the gas detector 130, and the control module is connected to a display screen. The display screen adopts a 4-inch industrial control screen, which can be installed on the fan body 110. The control module is electrically connected to four gas sensors. The four gas sensors are used to detect the gas composition data in the gas in a limited space and output detection signals. The control module is used to receive the detection limit number and calculate the content of the four gases, and communicate with the display screen through the RS485 communication circuit. The display screen is used to display the percentage of the content of each gas.

[0050] An audible and visual alarm 137 and an external probe 138 for the temperature and humidity module are also provided on the top of the main body 131. The quick connector 136, the external probe 138 for the temperature and humidity module and the audible and visual alarm 137 are arranged in sequence on the top of the main body 131. The wet temperature detection module is connected to the control module. The wet temperature detection module is used to detect the humidity and temperature in a limited space and output a wet temperature signal. The control module is used to receive the wet temperature signal and control the display screen to display the humidity and temperature in the limited space. The detection range of the four gases can be set in advance by the designer to four preset intervals. The audible and visual alarm 137 is connected to the control module. The control module is used to receive the detection signal and control the audible and visual alarm 137 to alarm when the corresponding component content is not in the set interval. It also supports abnormal data recording and export.

[0051] refer to Figure 1 、 Figure 4 In order to facilitate the operator to disassemble and connect the air duct 120, an air duct 150 is extended from the air outlet and the air supply outlet of the fan body 110. The air duct 150 is connected to the fan body 110. The two air ducts 150 are used to be detachably mounted on the air duct 120. The two air ducts 150 are connected to the air duct 120. Specifically, a plurality of limit blocks 121 are provided on the outer wall of the air duct 120. The plurality of limit blocks 121 are arranged at equal angles along the circumference of the air duct 120 on the outer wall of the air duct 120. A limited channel 122 is formed between two adjacent limit blocks 121. A plurality of limit matching blocks 151 are provided on the end surface of one end of the air duct 150. The plurality of limit matching blocks 151 are arranged at equal angles along the circumference of the air duct 150. The limit matching blocks 151 are arranged at equal angles along the circumference of the air duct 150. The limit matching blocks 151 are aligned with the limit channels 122 one by one. Correspondingly, when the air duct 150 is sleeved on the air duct 120, the limiting channel 122 allows the limiting matching block 151 to pass axially along the air duct 150, and the limiting matching block 151 is provided with an avoidance groove 152 on the side wall of the air duct 150 radially close to the central axis of the air duct 150, for the limiting block 121 to rotate and embed. The avoidance groove 152 penetrates the limiting matching block 151 circumferentially along the air duct 150, and the avoidance groove 152 penetrates the side wall of the air duct 150 radially close to the central axis of the air duct 150, and the bottom of the avoidance groove 152 abuts against the limiting block 121. After the limiting matching block 151 passes through the limiting channel 122, the air duct 120 is rotated so that the bottom of the avoidance groove 152 abuts against the limiting block 121, thereby limiting the axial relative movement of the air duct 120 and the air duct 150.

[0052] Correspondingly, a plurality of clamping blocks 153 are provided on the inner wall of the air duct 150, and the plurality of clamping blocks 153 are arranged at equal angles along the circumference of the air duct 150 on the inner wall of the air duct 150, and a plurality of L-shaped clamping grooves 123 for the clamping blocks 153 to be embedded are opened on the outer wall of the air duct 120, and the L-shaped clamping grooves 123 and the clamping blocks 153 correspond one to one, and the plurality of L-shaped clamping grooves 123 are opened at equal angles along the circumference of the air duct 120 on the air duct 120. On the outer wall of the tube 120, when the limiting matching block 151 enters the limiting channel 122, the clamping block 153 enters the L-shaped clamping groove 123 along the axial direction of the air duct 120. When the air duct 120 is rotated so that the bottom of the avoidance groove 152 contacts the limiting block 121, the clamping block 153 slides in the L-shaped clamping groove 123 along the circumference of the air duct 120, forming a double guarantee for the connection relationship between the air duct 120 and the air guide duct 150.

[0053] Furthermore, a circle of convex rings 124 is provided on the outer wall of the air duct 120, and the convex rings 124 are located between the L-shaped clamping groove 123 and the limit block 121 along the axial direction of the air duct 120. An elastic part 154 for embedding the convex rings 124 is provided on the inner wall of the air guide duct 150, thereby improving the connection sealing between the air duct 120 and the air guide duct 150.

[0054] Specifically, refer to Figure 4 、 Figure 5 , an elastic positioning member 160 is provided on the limiting matching block 151, and the elastic positioning member 160 is provided on the groove wall of the avoidance groove 152. A positioning groove 125 for the elastic positioning member 160 to be embedded is provided on the side wall of the limiting block 121 away from the air duct 120. The elastic positioning member 160 includes a positioning convex ball 161 and a return spring 162. A positioning embedding groove 155 is provided on the limiting matching block 151, and one end of the return spring 162 is connected to the positioning convex ball 161, and the other end of the return spring 162 is connected to the positioning embedding groove 155 is connected to the bottom of the groove, and the positioning convex ball 161 is partially embedded in the positioning embedding groove 155. The positioning convex ball 161 is used to be embedded in the positioning groove 125. When the air duct 120 is rotated until the positioning convex ball 161 is relative to the positioning groove 125, the elastic force of the return spring 162 causes the positioning convex ball 161 to be embedded in the positioning groove 125, thereby realizing the positioning between the air duct 120 and the air guide duct 150; when removing the air duct 120, it is only necessary to rotate the air duct 120 with force to disengage the positioning convex ball 161 from the positioning groove 125.

[0055] refer to Figure 1 、 Figure 6 and Figure 7 The rotation adjustment structure includes a support frame 170, a driving member 190 and a rotating connecting member 180. The support frame 170 is used to be arranged directly above the fan body 110. In this embodiment, the support frame 170 consists of a horizontally arranged placement platform 171 and four rectangular support legs 172 distributed at the bottom of the placement platform 171. Universal wheels 173 are provided under the support legs 172 to facilitate the movement of the support frame 170. The driving member 190 is provided on the support frame 170. The driving member 190 is a driving motor. The rotating connecting member 180 includes a pneumatic clamp 181, a rotating shaft 182 and a connecting rod 183. The connecting rod 183 is horizontally arranged, one end of the rotating shaft 182 is connected to the axial middle end of the connecting rod 183, and the other end of the rotating shaft 182 is coaxially connected to the output shaft of the driving motor. There are two pneumatic clamps 181, and the two pneumatic clamps 181 are respectively connected to the two ends of the connecting rod 183.

[0056] Correspondingly, two handles 112 are provided on the top of the fan body 110, and the two handles 112 are symmetrically arranged on the top of the fan body 110. Two pneumatic grippers 181 are respectively used to grab the handles of the two handles 112. A magnetic block 184 is provided at the bottom of the pneumatic gripper 181. The handle of the handle 112 is made of magnetic material. When the pneumatic gripper 181 approaches the handle of the handle 112, due to magnetic attraction, the handle 112 is upright for easy clamping by the pneumatic gripper 181. After the two pneumatic grippers 181 grab the handles of the two handles 112 respectively, the drive motor works to drive the fan body 110 to rotate together, thereby realizing the switching of the air outlet and the air supply outlet of the fan body 110. After the air duct 120 and the fan body 110 are connected in a detachable manner, the air duct 120 is quickly removed, and the fan body 110 is rotated. The air duct 120 originally connected to the air outlet of the fan body 110 is installed at the air supply outlet of the fan body 110, so that the device has both exhaust and air supply functions.

[0057] Also refer to Figure 8 、 Figure 9 、 Figure 12 The gas detector 130 also includes an RS485 communication circuit. The RS485 communication circuit includes a first chip U13, a fifth switch element Q5, and a sixth switch element Q6. The fifth switch element Q5 and the sixth switch element Q6 both use NPN transistors. A main control module is provided in the fan body 110. The control module includes an MCU chip U8. The MCU chip sends the data detected by the gas detector to the main control module through the RS485 communication circuit. The main control module communicates with the display screen so that the display screen displays the detection data (including humidity, temperature, and the content of each gas component). The fourth pin of the MCU chip is connected to a power supply circuit. The power supply circuit can use a switching power supply (see Figure 8 ), the input end of the power supply circuit is connected to a power supply, which can be AC ​​power or a battery. The two output ends of the power supply circuit are used to provide 3.3V and 5V respectively. The four input pins of the MCU chip are respectively connected to the four gas sensors. The first pin and the second pin of the MCU chip are respectively connected to the two input ends RX / TX of the RS485 communication circuit. The two input ends of the RS485 communication circuit are respectively connected to the control end of the fifth switch component and the input end of the sixth switch component. The output end of the fifth switch component and the output end of the sixth switch component are respectively connected to the two input pins of the first chip. The input end of the fifth switch component and the control end of the sixth switch component are both connected to the power supply circuit. The output pins A- / B- of the first chip are used to be connected to the input end of the main control module. The output end of the main control module is connected to the display screen.

[0058] Reference Figure 8 、 Figure 10The gas detector 130 also includes an alarm circuit, which includes an alarm interface BUZZ and a fourth switch element Q4. The fourth switch element Q4 uses an NPN transistor. The alarm interface is electrically connected to the sound and light alarm 137. The first pin of the alarm interface is connected to the power supply circuit, the second pin of the alarm interface is connected to the input end of the fourth switch element, the output end of the fourth switch element is grounded, and the control end of the fourth switch element is connected to the third pin of the MCU chip.

[0059] Reference Figure 8 、 Figure 11 The gas detector 130 also includes an air pump control circuit. The input end of the air pump control circuit is connected to the seventh pin of the MCU chip. The air pump control circuit includes an air pump connection interface XH6 and a third switch element Q3. The third switch element Q3 adopts an NPN transistor. The output end of the air pump connection interface is electrically connected to the active suction air pump 132. The first interface of the air pump connection interface is connected to the input end of the third switch element. The second interface of the air pump connection interface is connected to the 5V output end of the power supply circuit. The control end of the third switch element is connected to the input end of the air pump control circuit, and the output end of the third switch element is grounded.

[0060] Reference Figure 8 、 Figure 13 Finally, four gas acquisition general circuits are set between the gas sensor and the control module to realize the signal acquisition and transmission of the electrochemical sensor. The output ends of the four gas acquisition general circuits are connected to the eleventh to fourteenth input pins of the control module (LEL represents combustible gas, H2S represents hydrogen sulfide, CO represents carbon monoxide, and O2 represents oxygen). The specific gas acquisition general circuit can be seen Figure 13 .

[0061] The implementation principle of a gas monitoring integrated exhaust and extraction device in an embodiment of the present application is as follows: the fan body 131 is connected to the gas detector 130 by wire through a quick connector 136 and a quick interface 111, realizing data sharing and battery life. There is no need to carry a gas detection device independently, and there is no need to worry about the battery life of the detector. In addition, the detection component in the gas detector 130 detects the gas in a limited space in real time, and the display screen displays the detection results in real time.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A gas monitoring integrated ventilation device, characterized by: The invention comprises a blower body (110) and a gas detector (130), wherein a quick connector (136) is provided on the gas detector (130), a quick interface (111) is provided on a side wall of one side of the blower body (110), the quick connector (136) is used to be inserted into the quick interface (111), the gas detector (130) is used to detect gas in a limited space, the gas detector (130) is provided with a detection component for detecting gas in the limited space, the detection component is electrically connected to a control module, the control module is electrically connected to a display screen, the detection component is used to detect gas composition data in the gas in the limited space, and the display screen is used to display the gas composition data.

2. The gas monitoring integrated ventilation device according to claim 1, characterized in that: The gas detector (130) includes a main body (131), an active suction air pump (132), a gas detection inner cavity (133), an air inlet (134) and an air outlet (135), wherein the active suction air pump (132) and the gas detection inner cavity (133) are arranged in the main body (131), the air inlet (134) and the air outlet (135) are exposed at the top of the main body (131), the active suction air pump (132) is used to suck external gas into the gas detection inner cavity (133), the detection element is arranged in the gas detection inner cavity (133), and the external gas in the gas detection inner cavity (133) is discharged from the gas detection inner cavity (133) through the air outlet (135).

3. The gas monitoring integrated ventilation device according to claim 2, characterized in that: The detection component comprises four gas sensors, which are distributed in a rectangular shape in the gas detection inner cavity (133). The four gas sensors are used to detect hydrogen sulfide, carbon monoxide, combustible gas and oxygen respectively.

4. The gas monitoring integrated ventilation device according to claim 2, characterized in that: The main body (131) is provided with a humidity and temperature detection module, the humidity and temperature detection module is connected to the control module, the humidity and temperature detection module is used to detect the humidity and temperature in the limited space and output a humidity and temperature signal, and the control module is used to receive the humidity and temperature signal and control the display screen to display the humidity and temperature in the limited space.

5. The gas monitoring integrated ventilation device according to claim 3, characterized in that: The main body (131) is provided with an audible and visual alarm (137), which is connected to a control module. The detection element is used to detect gas component data in the gas within a limited space and output a detection signal. The control module is used to receive the detection signal and control the audible and visual alarm (137) to alarm when the corresponding component content is not within a set range.

6. The gas monitoring integrated ventilation device according to claim 5, characterized in that: The fan body (110) further comprises an RS485 communication circuit. A main control module is provided in the fan body (110). The RS485 communication circuit comprises a first chip, a fifth switch component and a sixth switch component. The control module comprises an MCU chip. The fourth pin of the MCU chip is connected to a power supply circuit. The first pin and the second pin of the MCU chip are respectively connected to two input ends of the RS485 communication circuit. The two input ends of the RS485 communication circuit are respectively connected to the control end of the fifth switch component and the input end of the sixth switch component. The output end of the fifth switch component and the output end of the sixth switch component are respectively connected to the two input pins of the first chip. The input end of the fifth switch component and the control end of the sixth switch component are both connected to the power supply circuit. The output pin of the first chip is used to be connected to the input end of the main control module. The output end of the main control module is connected to a display screen.

7. The gas monitoring integrated ventilation device according to claim 6, characterized in that: The device also includes an alarm circuit, the alarm circuit including an alarm interface and a fourth switch element, the alarm interface being electrically connected to the sound and light alarm (137), the first pin of the alarm interface being connected to the power supply circuit, the second pin of the alarm interface being connected to the input end of the fourth switch element, the output end of the fourth switch element being grounded, and the control end of the fourth switch element being connected to the third pin of the MCU chip.

8. The gas monitoring integrated ventilation device according to claim 6, characterized in that: The four input pins of the MCU chip are connected to four gas sensors respectively.

9. The gas monitoring integrated ventilation device according to claim 6, characterized in that: It also includes an air pump control circuit, the input end of the air pump control circuit is connected to the seventh pin of the MCU chip, the air pump control circuit includes an air pump connection interface and a third switch element, the output end of the air pump connection interface is electrically connected to the active suction air pump (132), the first interface of the air pump connection interface is connected to the input end of the third switch element, the second interface of the air pump connection interface is connected to the power supply circuit, the control end of the third switch element is connected to the input end of the air pump control circuit, and the output end of the third switch element is grounded.

10. The gas monitoring integrated ventilation device according to claim 6, characterized in that: The power supply circuit is connected to a power supply, and two output terminals of the power supply circuit are used to provide 3.3V and 5V respectively.

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