Indoor air harmful substance detection equipment

Abstract

The utility model discloses equipment for detecting harmful substances in indoor air, and belongs to the technical field of indoor air detection. Comprising a sealed box body, a detection unit, an air inlet unit, an exhaust unit, an air tank and a display screen, and an open top bin is arranged on the top surface of the sealed box body; two cylinder seats are fixed on the inner side of the top bin; a clamping groove is formed in the inner side of the sealing box body; the detection unit comprises a detection seat, the detection seat is of an inverted-T-shaped structure formed by fixing a transverse plate and a vertical plate, and the two sides of the vertical plate protrude out of the transverse plate and are movably embedded into the clamping grooves; an inverted-U-shaped through groove is formed in the middle of the bottom face of the vertical plate, and inverted-U-shaped air guide parts are fixed to the positions, on the two sides of the through groove, of the vertical plate. According to the indoor air harmful substance detection equipment disclosed by the utility model, before harmful substance detection, residual harmful substances can be removed from the detection equipment, and the formaldehyde detection sensor can be detected, verified and calibrated, so that the detection accuracy of the indoor air harmful substances is ensured.

Description

Technical Field

[0001] The utility model specifically relates to indoor air harmful substance detection equipment, belonging to the technical field of indoor air detection. Background Art

[0002] The harmful gas detector can be used to detect the concentration of relevant harmful gases in the fields of petroleum, chemical industry and pharmaceutical industry in real time to ensure the safety of workers; and for newly renovated buildings, the harmful gas is mainly formaldehyde. After the formaldehyde volatilizes for a period of time, it is necessary to detect the indoor formaldehyde content through a formaldehyde rapid determination device to avoid the damage to human health caused by excessive formaldehyde content. The existing indoor air harmful substance detection equipment, such as the Chinese patent authorization announcement number: CN211505440U, discloses an indoor air harmful substance detection equipment, including a shell, an air intake pipe, an air pump, a connecting pipe, an air storage cavity, an exhaust pipe, an air purification filter structure, a connecting structure, a hook, a formaldehyde module and a battery power supply. The air pump can accelerate the circulation rate of indoor air inside the device, so that the indoor air can be detected quickly, and the speed of the device detection of harmful substances can be improved. However, when the detection device is detected, it is easy to be interfered by the harmful substances remaining in the last time, which affects the detection accuracy; in addition, when the detection device is detected, the detection head cannot be calibrated, and the detection accuracy cannot be guaranteed. Utility Model Content

[0003] In order to solve the above problems, the utility model proposes an indoor air harmful substance detection device. Before performing harmful substance detection, the residual harmful substances left in the detection device can be removed, and the formaldehyde detection sensor can be tested, checked and calibrated to ensure the accuracy of the detection of harmful substances in the indoor air.

[0004] The utility model of indoor air harmful substance detection equipment includes:

[0005] A sealed box body, wherein the top surface of the sealed box body is provided with an open top bin; two cartridge seats are fixed inside the top bin; and a card slot is provided inside the sealed box body;

[0006] The detection unit comprises a detection seat, which is fixed by a horizontal plate and a vertical plate to form an inverted T-shaped structure, the two sides of the vertical plate protrude from the outside of the horizontal plate and are movably engaged with the card slot; an inverted U-shaped through slot is opened in the middle of the bottom surface of the vertical plate, and the vertical plate is fixed with an inverted U-shaped air guide part on both sides of the through slot; the bottom surface of the detection seat is engaged with the inner bottom surface of the sealed box body and is locked by bolts; a formaldehyde detection sensor is fixed on the horizontal plate facing the through slot; a filter is arranged on the front side of the air guide part;

[0007] An air intake unit, the air intake unit being installed at the upper front portion of the sealed box body;

[0008] An exhaust unit, the exhaust unit comprising an exhaust valve embedded and fixed at the lower front end of the side of the sealed box body, and a three-way valve embedded and fixed at the top end of the rear side of the sealed box body;

[0009] A gas tank, which is embedded in the inner side of the cylinder seat and locked by bolts; the gas tank includes a pure gas storage tank and an exhaust gas collection tank;

[0010] The exhaust valve and the exhaust gas collection tank are connected via a quick connector; the pure gas storage tank and one end of the three-way valve are connected via a quick connector, and the remaining end of the three-way valve is hollow;

[0011] A display screen is fixed to the rear side of the sealed box body and connected to a controller for controlling the entire machine.

[0012] Before testing, open the three-way valve and the exhaust valve first; the pressurized gas in the pure gas storage tank is pumped into the rear end of the sealed box, and the pressurized gas is sprayed to the front end of the sealed box through the through slot; when spraying, the pure gas can filter the dust on the filter screen at the same time, and the gas containing the filtered dust and harmful substances is discharged from the exhaust valve and pumped into the exhaust gas collection tank; when testing harmful substances in indoor air, it is necessary to seal the indoor room for a set time to release the harmful substances and fully enrich them in the air so that they can be accurately detected by the formaldehyde detection sensor. Since the detection environment is a closed space, it is necessary to collect the pressurized gas released by the pure gas storage tank through the exhaust gas collection tank; avoid the gas in the pure gas storage tank affecting the indoor room environment; the pure gas in the pure gas storage tank continues to spray and flush the detection equipment until it is flushed to When the set time comes or the formaldehyde detection sensor cannot detect harmful gases, the residual harmful substances in the detection equipment are removed, and the detection, verification and calibration of the formaldehyde detection sensor are completed simultaneously; then, the three-way valve is switched, the pure gas storage tank is closed, and the exhaust valve is closed at the same time; then, after the detection equipment is left stationary in the detection space for a set time, the air intake unit is turned on, and the indoor air is sent to the front side of the sealed box through the air intake unit; and the air is sent to the rear side of the sealed box through the through groove and the air guide; finally, it is discharged to the outside through the hollow end of the three-way valve; thereby, the harmful substances in the air are monitored in real time through the formaldehyde detection sensor; after the quantification of the harmful substances is completed, the collected data is sent to the controller, the controller collects the set number of times within the set time, and calculates the average value of the collected data, and the calculation result is sent to the display screen for display and record.

[0013] Furthermore, a mounting seat is provided at the bottom of the sealed box; the detection device can be installed in the indoor detection space through the mounting seat.

[0014] Furthermore, a mounting seat is provided at the bottom of the sealed box; the mounting seat is installed with a tripod folding bracket; the detection equipment can be supported by the cooperation of the triangular folding bracket and the mounting seat; and the detection equipment is set up in the indoor detection space.

[0015] Furthermore, the mounting base is fixed to the rotating end of the rotating table; when 360° sampling and detection of indoor air is required, the detection device is driven to rotate by the rotating table, and the detection device can perform rotation sampling and detection of the indoor air.

[0016] Furthermore, a one-way valve is provided on the waste gas collecting tank; an electrically controlled opening valve is also provided on the pure gas storage tank; when the flushing gas is injected into the waste gas collecting tank, it is continuously collected by the waste gas collecting tank, and when the exhaust valve is closed, the one-way valve can be automatically closed; the electrically controlled opening valve can adjust the flushing pressure of the pure gas on the inside of the detection equipment.

[0017] Furthermore, the air intake unit includes a support platform fixed to the front side of the sealed box, and a main pipe and an air intake fan are fixed on the support platform; a plurality of branch pipes are fixed on the main pipe, and the branch pipes are connected with the sealed box; a detection air intake pipe is fixed in the middle of the main pipe, and an air intake control valve is connected in series to the detection air intake pipe; the input end of the air intake control valve is connected with the air intake fan; when intake, the air intake control valve and the air intake fan are opened, and the indoor air is drawn into the detection air intake pipe through the air intake fan, and enters the main pipe through the air intake control valve, and the indoor air is pumped into the front side of the inside of the sealed box through the main pipe and the branch pipe.

[0018] Furthermore, a heater is installed between the formaldehyde detection sensor and the horizontal plate; the heater can control the detection temperature of the formaldehyde detection sensor to avoid affecting the detection accuracy of the formaldehyde detection sensor for harmful substances in the air under low temperature conditions.

[0019] Furthermore, after the vertical plate is engaged with the card slot, the interior of the sealed box is divided into two chambers, and the two chambers are connected through the through slot; the air inside the two chambers can enter smoothly, avoiding large fluctuations in air detection by the formaldehyde detection sensor.

[0020] Furthermore, an exhaust pump is provided at the input end of the waste gas collection tank; when the detection equipment completes the preparation before detection, the flushing gas in the detection equipment is pumped into the waste gas collection tank through the exhaust pump, so that the interior of the detection equipment is in a vacuum state, thereby preventing the flushing gas buffered in the detection equipment from affecting the indoor air detection accuracy.

[0021] Compared with the prior art, the indoor air harmful substance detection equipment of the utility model, before conducting harmful substance detection, first uses pure gas to remove the residual harmful substances left over from the previous detection of the detection equipment, and simultaneously removes the dust on the filter; at the same time, the formaldehyde detection sensor can be detected, checked and calibrated by pure gas; when the pure gas is used to flush the detection equipment, the flushing gas can be collected to avoid interfering with the closed indoor air, thereby ensuring the accuracy of the detection of harmful substances in the indoor air. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the indoor air harmful substance detection equipment of the present utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the detection equipment of the utility model without installing an air intake fan.

[0024] Figure 3 It is a schematic diagram of the internal structure of the sealed box of the utility model.

[0025] Figure 4 It is a schematic diagram of the overall structure of the detection unit of the utility model.

[0026] Figure numerals: 1. Sealed box, 2. Cylinder seat, 3. Detection seat, 4. Horizontal plate, 5. Vertical plate, 6. Through groove, 7. Air guide part, 8. Formaldehyde detection sensor, 9. Filter, 10. Exhaust valve, 11. Three-way valve, 12. Pure gas storage tank, 13. Waste gas collection tank, 14. Quick connector, 15. Mounting seat, 16. Support platform, 17. Main pipe, 18. Intake fan, 19. Branch pipe, 20. Detection intake pipe, 21. Intake control valve, 22. Heater, 23. One-way valve, 24. Electric control opening valve, 25. Hose. DETAILED DESCRIPTION

[0027] Example:

[0028] like Figures 1 to 4 The indoor air harmful substance detection equipment shown includes:

[0029] A sealed box body 1, wherein the top surface of the sealed box body 1 is provided with an open top bin; two cartridge seats 2 are fixed inside the top bin; and a card slot is provided inside the sealed box body 1;

[0030] The detection unit includes a detection seat 3, which is fixed by a horizontal plate 4 and a vertical plate 5 to form an inverted T-shaped structure. The two sides of the vertical plate 5 protrude from the outside of the horizontal plate 4 and are movably engaged with the card slot; an inverted U-shaped through groove 6 is opened in the middle of the bottom surface of the vertical plate 5, and an inverted U-shaped air guide 7 is fixed on both sides of the through groove 6 of the vertical plate 5; the bottom surface of the detection seat 3 is engaged with the inner bottom surface of the sealed box body 1 and is locked by bolts; a formaldehyde detection sensor 8 is fixed on the horizontal plate 4 facing the through groove 6; a filter screen 9 is arranged on the front side of the air guide 7;

[0031] An air intake unit, the air intake unit is installed on the upper front side of the sealed box body 1;

[0032] An exhaust unit, the exhaust unit comprising an exhaust valve 10 embedded and fixed at the lower front end of the side of the sealed box body 1, and a three-way valve 11 embedded and fixed at the top end of the rear side of the sealed box body 1;

[0033] A gas tank, which is embedded in the inner side of the cylinder seat 2 and locked by bolts; the gas tank includes a pure gas storage tank 12 and an exhaust gas collection tank 13;

[0034] The exhaust valve 10 and the waste gas collecting tank 13 are connected by a quick connector 14; the pure gas storage tank 12 and one end of the three-way valve 11 are connected by a quick connector 14, and the remaining end of the three-way valve 11 is hollow; the quick connector 14 adopts a conventional air quick connector; the male ends of the two quick connectors 14 are respectively fixed to the exhaust valve 10 and the waste gas collecting tank 13; the female end of the quick connector 14 is connected to the two ends of the hose 25; the connection between the exhaust valve 10 and the waste gas collecting tank 13 can be achieved by connecting the male and female ends of the quick connector 14 in sequence; similarly, the male ends of the two quick connectors 14 are fixed to the pure gas storage tank 12 and one end of the three-way valve 11; the female end of the quick connector 14 is connected to another hose 25; the connection between the pure gas storage tank 12 and the three-way valve 11 can be achieved by connecting the male and female ends of the quick connector 14 in sequence; the three-way valve 11 includes a three-way valve, and the three ports of the three-way valve are all provided with a switch valve; the corresponding port of the three-way valve 11 can be controlled to be opened or closed by controlling the switch valve;

[0035] A display screen is fixed to the rear side of the sealed box 1 and is connected to a controller for controlling the entire machine.

[0036] Before detection, the switch valve corresponding to the three-way valve 11 is controlled to open, so that the pipeline of the pure gas storage tank 12 and the sealed box 1 is connected, and the exhaust valve 10 is opened at the same time; the pressurized gas stored in the pure gas storage tank 12 enters the rear side of the sealed box 1, and then the pressurized gas is sprayed to the front end of the sealed box 1 through the through groove 6; when spraying, the pure gas can filter the dust on the filter 9 at the same time, and the gas containing the filtered dust and harmful substances is discharged from the exhaust valve 10 and concentrated in the exhaust gas collection tank 13; when detecting harmful substances in indoor air, it is necessary to seal the indoor room for a set time to release the harmful substances and fully enrich them in the air so that they can be accurately detected by the formaldehyde detection sensor 8. Since the detection environment is a closed space, it is necessary to pass The waste gas collection tank 13 collects the pressurized gas released from the pure gas storage tank 12 to prevent the gas in the pure gas storage tank 12 from affecting the indoor room environment. The waste gas collection tank 13 collects the pressurized gas released from the pure gas storage tank 12 in the following process: the pressurized gas stored in the pure gas storage tank 12 flushes the inside of the sealed box 1, and the pure gas can filter the dust on the filter 9. The gas containing the filtered dust and harmful substances is discharged from the exhaust valve 10 and concentrated in the waste gas collection tank 13. An exhaust pump can also be provided at the input end of the waste gas collection tank 13. The gas in the detection equipment is pumped to the waste gas collection tank 13 by the exhaust pump. The inside of the detection equipment is in a vacuum state to prevent the flushing gas buffered in the detection equipment from affecting the indoor air detection accuracy.

[0037] The pure gas in the pure gas storage tank 12 is continuously sprayed and flushed to the entire detection equipment until the set flushing time is reached or the formaldehyde detection sensor 8 detects no harmful gas, thereby completing the removal of the residual harmful substances in the detection equipment, and simultaneously completing the detection, verification and calibration of the formaldehyde detection sensor 8; then, the switch valve currently opened by the three-way valve 11 is closed to disconnect the pipeline between the pure gas storage tank 12 and the sealed box 1; the pure gas storage tank 12 is closed, and the exhaust valve 10 is closed at the same time; then, the switch valve corresponding to the three-way valve 11 is controlled to connect the pure gas storage tank 12 and the hollow end of the three-way valve 11; then, after the detection equipment is left to stand in the detection space for a set time, the air intake unit is turned on, and the indoor air is sent into the front side of the sealed box 1 through the air intake unit; and the air is sent into the rear side of the sealed box 1 through the through groove 6 and the air guide 7; finally, it is discharged through the hollow end of the three-way valve 11; so that the indoor air is continuously discharged from the sealed box 1 The air flows through the through groove 6 and the air guide 7 inside the sealed box 1 to form a detection flow channel; the indoor air chamber can continuously and stably pass through the detection flow channel, so that it can be accurately measured by the formaldehyde detection sensor 8; because the indoor air is in a flowing state inside the sealed box 1, the harmful substances in the air can be monitored in real time through the formaldehyde detection sensor 8. The formaldehyde detection sensor 8 adopts a traditional formaldehyde gas electronic nose. After completing the quantification of formaldehyde and TVOC (total volatile organic compounds) harmful substances, the collected data is sent to the controller. The controller collects the set number of times within the set time, and calculates the average value of the collected data. The calculation result is sent to the display screen for display and record; among them, when studying indoor air quality, the indoor organic gaseous substances they sample and analyze are usually called VOC, such as carbon monoxide, carbon dioxide, carbonic acid, metal carbide, carbonate and ammonium carbonate, and the measured VOC is collectively called total volatile organic compounds (TVOC).

[0038] A mounting seat 15 is provided at the bottom of the sealed box 1 ; the detection device can be installed in the indoor detection space through the mounting seat 15 .

[0039] A mounting seat 15 is provided at the bottom of the sealed box 1; the mounting seat 15 is installed with a tripod folding bracket; the detection equipment can be supported by the cooperation of the triangular folding bracket and the mounting seat 15; and the detection equipment is set up in the indoor detection space.

[0040] The mounting base 15 is fixed to the rotating end of the rotating table; when 360° sampling and detection of indoor air is required, the detection device is driven to rotate by the rotating table, and the detection device can perform rotation sampling and detection of indoor air.

[0041] The waste gas collecting tank 13 is provided with a one-way valve 23; the pure gas storage tank 12 is also provided with an electrically controlled opening valve 24; when the flushing gas is injected into the waste gas collecting tank 13, it is continuously collected by the waste gas collecting tank 13, and when the exhaust valve 10 is closed, the one-way valve 23 can be automatically closed; the electrically controlled opening valve 24 can adjust the flushing pressure of the pure gas on the inside of the detection equipment.

[0042] The air intake unit includes a support 16 fixed to the front side of the sealed box body 1, and a main pipe 17 and an air intake fan 18 are fixed on the support 16; a plurality of branch pipes 19 are fixed on the main pipe 17, and the branch pipes 19 are connected with the sealed box body 1; a detection air intake pipe 20 is fixed in the middle of the main pipe 17, and an air intake control valve 21 is connected in series to the detection air intake pipe 20; the input end of the air intake control valve 21 is connected with the air intake fan 18; when air is taken in, the air intake control valve 21 and the air intake fan 18 are opened, and the indoor air is drawn into the detection air intake pipe 20 through the air intake fan 18, and enters the main pipe 17 through the air intake control valve 21, and the indoor air is pumped into the front side of the interior of the sealed box body 1 through the main pipe 17 and the branch pipe 19.

[0043] A heater 22 is installed between the formaldehyde detection sensor 8 and the horizontal plate 4; the heater 22 can control the detection temperature of the formaldehyde detection sensor 8 to avoid affecting the detection accuracy of the formaldehyde detection sensor 8 on harmful substances in the air under low temperature conditions.

[0044] After the vertical plate 5 is engaged with the card slot, the interior of the sealed box body 1 is divided into two chambers, and the two chambers are connected through the through slot 6; the air inside the two chambers can smoothly enter the chambers, avoiding large fluctuations in the air detection by the formaldehyde detection sensor 8.

[0045] The above embodiments are only preferred implementations of the present invention, so any equivalent changes or modifications made according to the structures, features and principles described in the scope of application of the present invention are included in the scope of application of the present invention.

Claims

1. An indoor air harmful substance detection device, characterized in that: include: A sealed box body, wherein the top surface of the sealed box body is provided with an open top bin; two cartridge seats are fixed inside the top bin; and a card slot is provided inside the sealed box body; The detection unit comprises a detection seat, which is fixed by a horizontal plate and a vertical plate to form an inverted T-shaped structure, the two sides of the vertical plate protrude from the outside of the horizontal plate and are movably engaged with the card slot; an inverted U-shaped through slot is opened in the middle of the bottom surface of the vertical plate, and the vertical plate is fixed with an inverted U-shaped air guide part on both sides of the through slot; the bottom surface of the detection seat is engaged with the inner bottom surface of the sealed box body and is locked by bolts; a formaldehyde detection sensor is fixed on the horizontal plate facing the through slot; a filter is arranged on the front side of the air guide part; An air intake unit, the air intake unit being installed at the upper front portion of the sealed box body; An exhaust unit, the exhaust unit comprising an exhaust valve embedded and fixed at the lower front end of the side of the sealed box body, and a three-way valve embedded and fixed at the top end of the rear side of the sealed box body; A gas tank, which is embedded in the inner side of the cylinder seat and locked by bolts; the gas tank includes a pure gas storage tank and an exhaust gas collection tank; The exhaust valve and the exhaust gas collection tank are connected via a quick connector; the pure gas storage tank and one end of the three-way valve are connected via a quick connector, and the remaining end of the three-way valve is hollow; A display screen is fixed to the rear side of the sealed box body and connected to a controller for controlling the entire machine.

2. The indoor air harmful substance detection device according to claim 1, characterized in that: A mounting seat is arranged at the bottom of the sealing box.

3. The indoor air harmful substance detection device according to claim 2, characterized in that: The mounting seat is mounted on a tripod folding bracket.

4. The indoor air harmful substance detection device according to claim 2, characterized in that: The mounting seat is fixed to the rotating end of the rotating platform.

5. The indoor air harmful substance detection device according to claim 1, characterized in that: The waste gas collecting tank is provided with a one-way valve; the pure gas storage tank is also provided with an electrically controlled opening valve.

6. The indoor air harmful substance detection device according to claim 1, characterized in that: The air intake unit includes a support platform fixed to the front side of the sealed box body, on which a main pipe and an air intake fan are fixed; a plurality of branch pipes are fixed to the main pipe, and the branch pipes are connected to the sealed box body; a detection air intake pipe is fixed to the middle of the main pipe, and an air intake control valve is connected in series to the detection air intake pipe; the input end of the air intake control valve is connected to the air intake fan.

7. The indoor air harmful substance detection device according to claim 1, characterized in that: A heater is installed between the formaldehyde detection sensor and the horizontal plate.

8. The indoor air harmful substance detection device according to claim 1, characterized in that: After the vertical plate is engaged with the card slot, the interior of the sealed box is divided into two chambers, and the two chambers are connected through the through slot.

9. The indoor air harmful substance detection device according to claim 1, characterized in that: The input end of the waste gas collecting tank is provided with an air pump.

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