Portable formaldehyde TVOC (Total Volatile Organic Compound) sampling device

Abstract

The invention relates to the field of gas sampling, in particular to a portable formaldehyde TVOC sampling device, which comprises a sampling pump unit and a sampling unit, and comprises a sampling cylinder arranged on a base, a filter cylinder arranged in the sampling cylinder and a separation seat arranged in the filter cylinder, and a detection unit. By arranging the detection unit, formaldehyde sampling and TVOC detection are integrated together, and the overall sampling device is smaller in size; the sampling pump unit, the sampling unit and the detection unit are separately arranged, so that the sampling equipment can be repeatedly utilized only by replacing a detection bin during sampling, the number of consumables in the sampling process is reduced, the size of working equipment is reduced, the transportation cost and the equipment cost are saved, and meanwhile, the leakproofness and the stability in the sample transfer process are improved; after a power supply is switched on, the sampling pump unit and the sampling unit are connected, and the whole sampling device automatically starts to work, so that a user can conveniently sample by himself / herself, and the time consumed by on-site sampling of personnel is shortened.

Description

Technical Field

[0001] The invention relates to the field of gas sampling, in particular to a portable formaldehyde TVOC sampling device. Background Art

[0002] Indoor air pollution has become a hot topic of concern, and indoor air quality is increasingly valued by consumers. According to existing national and international standards, indoor air quality testing almost always involves manual on-site sampling. The traditional sampling process is time-consuming. Consumers typically arrange for an agency to conduct indoor air sampling after renovations are completed or furniture arrives. The sampled media is then transported to a laboratory for testing, and the results are analyzed to determine the formaldehyde and TVOC concentrations in the sampled indoor air. This entire process is relatively labor-intensive and time-consuming. Implementing customer-initiated sampling is an effective approach to addressing this issue.

[0003] At present, traditional air samplers need to be operated by professionals, and the use process is relatively cumbersome. They need to be connected to the sampling tube externally, and the sampling time and sampling flow need to be adjusted on site. Other equipment is also needed to record environmental conditions such as on-site temperature and humidity. On the other hand, traditional samplers are expensive and have high precision internal parts, which are not suitable for high-frequency express delivery. Combining the above two aspects, traditional samplers are not suitable for consumers to send to operate by themselves. During the self-sampling process, the sample purity is low, and the sample may be contaminated during transportation, resulting in deviations in the final detection indicators. In addition, the formaldehyde and TVOC sampling processes of traditional samplers are separated independently, and different sampling parameters need to be set, which is cumbersome to use. Summary of the Invention

[0004] In view of the problems in the above-mentioned prior art that traditional samplers are not convenient for users to conduct independent sampling, nor are they convenient for sample storage and transfer, we have proposed the present invention.

[0005] Therefore, the object of the present invention is to provide a portable formaldehyde TVOC sampling device.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a portable formaldehyde TVOC sampling device, comprising a sampling pump unit, a sampling unit and a detection unit.

[0007] The sampling pump unit includes a base and a sampling pump arranged in the base; the sampling unit includes a sampling cylinder arranged on the base, a filter cylinder arranged inside the sampling cylinder, and a partition seat arranged in the filter cylinder; and the detection unit includes a protective shell arranged on the sampling cylinder, a sealing seat arranged on the sampling cylinder and located between the partition seat and the protective shell, and a detection component for detecting formaldehyde and TVOC; wherein the enclosed space between the base and the partition seat is set as an air intake space, the enclosed space between the partition seat and the sealing seat is set as a one-way ventilation space, the enclosed space between the sealing seat and the protective shell is set as a detection space, and the detection component and the detection space are sealed with each other.

[0008] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the sampling cylinder is provided with an air inlet hole; and the filter cylinder is provided with a filter hole.

[0009] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the filter hole is connected to the air intake space.

[0010] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the separator is provided with a gas channel mounting seat located in the one-way ventilation space, the gas channel mounting seat is provided with a detection unit connecting seat, the separator is provided with a telescopic groove, and the separator is also provided with a one-way air inlet nozzle that is connected to the detection unit connecting seat and is located in the air inlet space.

[0011] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the sealing seat is provided with a detection component air inlet nozzle connected to the detection component, the sealing seat is provided with a sampling gas conduit connected to the detection unit connecting seat, and the sealing seat is also provided with a ventilation valve connected between the one-way ventilation space and the detection space.

[0012] As a preferred embodiment of the portable formaldehyde and TVOC sampling device of the present invention, the detection component includes a detection chamber arranged in a protective shell and internally provided with a formaldehyde detection reagent and a TVOC detection reagent, a formaldehyde detection tube connected to the formaldehyde detection reagent at one end and connected to the air inlet nozzle of the detection component at the other end, and a TC composite tube connected to the TVOC detection reagent at one end and connected to the air inlet nozzle of the detection component at the other end.

[0013] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the filter cartridge is provided with a receiving plate located below the partition seat, and the receiving plate is provided with an air inlet groove for installing a one-way air inlet nozzle.

[0014] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, the sampling pump is provided with a sampling pump mounting seat connected to the base, and the sampling pump is provided with an air pressure detector.

[0015] As a preferred embodiment of the portable formaldehyde TVOC sampling device of the present invention, a protective pad is provided at the bottom of the base, a sampling status display screen communicating with the detection component is provided on the base, and a counterweight block is provided inside the base.

[0016] As a preferred solution of the portable formaldehyde TVOC sampling device of the present invention, a charging module electrically connected to the sampling pump is provided on the base.

[0017] The portable formaldehyde and TVOC sampling device of the present invention has the following beneficial effects: formaldehyde sampling and TVOC detection are integrated together by setting up a detection unit, and the overall sampling device is smaller in size; the sampling pump unit, the sampling unit and the detection unit are separately arranged, and during sampling, only the detection chamber needs to be replaced to realize the repeated use of the sampling equipment, thereby reducing the number of consumables in the sampling process, reducing the volume of the working equipment, saving transportation costs and equipment costs, and improving the airtightness and stability during the sample transfer process; as long as the power is turned on and the sampling pump unit and the sampling unit are connected, the overall sampling device automatically starts working, which is convenient for users to take samples by themselves and reduces the time consumed by personnel for on-site sampling. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 The structure of the portable formaldehyde TVOC sampling device of the present invention is shown as follows: Figure 1 .

[0020] Figure 2 The structure of the portable formaldehyde TVOC sampling device of the present invention is shown as follows: Figure 2 .

[0021] Figure 3 This is a cross-sectional view of the portable formaldehyde TVOC sampling device of the present invention.

[0022] Figure 4 The explosion of the portable formaldehyde TVOC sampling device of the present invention Figure 1 .

[0023] Figure 5The explosion of the portable formaldehyde TVOC sampling device of the present invention Figure 2 .

[0024] Figure 6 It is a cross-sectional view of the filter cartridge in the portable formaldehyde TVOC sampling device of the present invention.

[0025] Figure 7 This is a cross-sectional view of the sampling tube in the portable formaldehyde TVOC sampling device of the present invention.

[0026] In the figure: 100, sampling pump unit; 101, base; 1011, protective pad; 1012, sampling status display; 1013, counterweight; 102, charging module; 103, sampling pump mounting base; 104, sampling pump; 1041, air pressure detector; 200, sampling unit; 201, sampling cylinder; 2011, air inlet hole; 202, filter cylinder; 2021, filter hole; 2022, receiving plate; 2023, air inlet slot; 203, partition seat; 2031 , gas channel mounting seat; 2032, detection unit connecting seat; 2033, telescopic slot; 2034, one-way air inlet nozzle; 300, detection unit; 301, protective shell; 302, sealing seat; 3021, detection component air inlet nozzle; 3022, sampling gas conduit; 3023, ventilation valve; 303, detection component; 3031, detection chamber; 3032, formaldehyde detection tube; 3033, TC composite tube; A, air intake space; B, one-way ventilation space; C, detection space. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0028] Reference Figures 1 to 6 This embodiment provides a portable formaldehyde and TVOC sampling device that can automatically sample indoor air, ensure sample purity, ensure sealing during sample transfer, facilitate repeated gas sampling, and quickly perform formaldehyde and TVOC simultaneous detection. The device comprises a sampling pump unit 100, a sampling unit 200, and a detection unit 300. The sampling pump unit 100 primarily provides power for gas collection; the sampling unit 200 provides a channel for gas to enter the sampling device. At the same time, the sampled gas inside the sampling unit 200 and the detection unit 300 is separated to prevent other gases from affecting the sample purity during the transfer of the sampling device; the detection unit 300 is used to detect whether the sample contains formaldehyde or TVOC in real time, and at the same time, feed back the detection data to the sampling status display screen 1012 provided on the surface of the sampling pump unit 100.

[0029] Reference Figures 1 to 4The sampling pump unit 100 includes a base 101 and a sampling pump 104 disposed in the base 101. During operation, the base 101 is disposed in an indoor environment where an air sample is to be sampled and is stably placed on a plane in the working area to ensure that the sampling pump unit 100 and the detection unit 300 operate normally.

[0030] Reference Figures 1 to 7 The sampling unit 200 includes a sampling cartridge 201 disposed on the base 101, a filter cartridge 202 disposed inside the sampling cartridge 201, and a separator 203 disposed inside the filter cartridge 202. During the detection process, the sampling cartridge 201 is located at the outermost side of the sampling device and is in contact with the outside air. An oleophobic layer is attached to the surface of the sampling cartridge 201 to prevent dirt from adhering to the sampling cartridge 201. The filter cartridge 202 is disposed on the inner wall of the sampling cartridge 201 and is used to filter particles with molecular weights greater than TVOC and formaldehyde contained in the gas passing through the sampling cartridge 201, thereby improving the gas purity of the air sampled by the sampling device and preventing impurities from affecting the detection unit 300 inside the sampling device. By disassembling the sampling cartridge 201 disposed on the base 101, the filter cartridge 202 can be replaced or cleaned, thereby preventing particles contained in the air from entering the sampling device, thereby improving the purity of the sampled air. A partition seat 203 is provided to isolate the air intake space A inside the sampling device for direct contact of the sampled air with the atmosphere and the one-way ventilation space B and detection space C for guiding the sampled gas and detecting the sampled gas, thereby ensuring that only a single channel can be used for gas sampling. As long as the single channel is a one-way channel, it can be ensured that the gas after sampling will not leak, thereby ensuring the stability of the samples during transportation of the sampling device and avoiding contamination of the samples.

[0031] Reference Figures 1 to 7 The detection unit 300 includes a protective shell 301 arranged on the sampling cylinder 201, a sealing seat 302 arranged on the sampling cylinder 201 and located between the partition seat 203 and the protective shell 301, and a detection component 303 for detecting formaldehyde and TVOC. The protective shell 301 protects the detection component 303, and the sealing seat 302 is used to seal the space where the detection component 303 is located. In this way, when the user replaces the container for storing gas samples in the detection component 303, it only needs to ensure that the gas channels in the detection component 303 are all one-way, so as not to cause pollution to the space inside the sampling device.

[0032] The enclosed space between the base 101 and the partition seat 203 is set as the air intake space A, the enclosed space between the partition seat 203 and the sealing seat 302 is set as the one-way ventilation space B, and the enclosed space between the sealing seat 302 and the protective shell 301 is set as the detection space C. The detection component 303 and the detection space C are sealed with each other. The air intake space A and the one-way ventilation space B are separated by the partition seat 203 to ensure that only a single channel can be used for gas sampling. As long as the single channel is a one-way channel, it can be ensured that the gas after sampling will not leak, thereby ensuring the stability of the sample during transportation of the sampling device and preventing the sample from being contaminated. The sealing seat 302 separates the one-way ventilation space B and the detection space C. In this way, when the user replaces the container for storing gas samples in the detection component 303, he only needs to ensure that the gas channels in the detection component 303 are all one-way, so as not to cause contamination to the air intake space A and the one-way ventilation space B inside the sampling device.

[0033] Furthermore, the sampling cartridge 201 is provided with an air inlet hole 2011, and the filter cartridge 202 is provided with a filter hole 2021, which is connected to the air inlet space A. When the user places the sampling device in the sampling space and activates the sampling pump 104 to sample gas, ambient air first passes through the air inlet hole 2011 in the sampling cartridge 201 under the action of the sampling pump 104, then reaches the filter hole 2021 in the filter cartridge 202, and finally enters the air inlet space A connected to the filter hole 2021.

[0034] Furthermore, the partition seat 203 is provided with a gas channel mounting seat 2031 located in the one-way ventilation space B, the gas channel mounting seat 2031 is provided with a detection unit connecting seat 2032, the partition seat 203 is provided with a telescopic slot 2033, and the partition seat 203 is also provided with a one-way air inlet nozzle 2034 that is connected to the detection unit connecting seat 2032 and is located in the air intake space A. The air entering the air intake space A first contacts the partition seat 203, then enters the gas channel mounting seat 2031 from the one-way air inlet nozzle 2034, and then enters the interior of the detection unit 300 under the guidance of the detection unit connecting seat 2032. The telescopic slot 2033 provided on the partition seat 203 can adapt to the changing air pressure inside the sampling device, avoiding the air tightness of the sampling device being affected when there is too much sampled gas and the sampling pump 104 does not stop working.

[0035] Furthermore, the sealing seat 302 is provided with a detection component air inlet nozzle 3021 connected to the detection component 303, the sealing seat 302 is provided with a sampling gas conduit 3022 connected to the detection unit connecting seat 2032, and the sealing seat 302 is also provided with a ventilation valve 3023 connected between the one-way ventilation space B and the detection space C.

[0036] Furthermore, the detection assembly 303 includes a detection chamber 3031 disposed within the protective shell 301 and containing a formaldehyde detection reagent and a TVOC detection reagent, a formaldehyde detection tube 3032 having one end connected to the formaldehyde detection reagent and the other end connected to the detection assembly air inlet nozzle 3021, and a TC composite tube 3033 having one end connected to the TVOC detection reagent and the other end connected to the detection assembly air inlet nozzle 3021. Air entering the detection assembly 303 through the detection unit connector 2032 passes through the formaldehyde detection tube 3032 and enters the formaldehyde detection reagent in the detection chamber 3031. Air also passes through the TC composite tube 3033 and enters the TVOC detection reagent in the detection chamber 3031. Formaldehyde and TVOC are detected in real time during the sampling process. The detection results of the formaldehyde detection reagent and TVOC detection reagent are fed back to the main control circuit board of the sampling device in real time via detection sensors existing in the prior art.

[0037] Furthermore, a receiving plate 2022 is provided inside the filter cartridge 202 below the partition seat 203, and an air inlet groove 2023 for installing a one-way air inlet nozzle 2034 is provided on the receiving plate 2022. The provision of the receiving plate 2022 improves the installation stability of the protective shell 301 and the sampling cartridge 201.

[0038] Furthermore, the sampling pump 104 is provided with a sampling pump mounting base 103 connected to the base 101, and the sampling pump 104 is provided with an air pressure detector 1041. The sampling pump mounting base 103 offsets the vibration generated during the operation of the sampling pump 104, reducing the impact of the vibration generated during the operation of the sampling pump 104 on the sampling device. The air pressure detector is provided to feed back the air pressure value inside the sampling device to the user in real time, so that sampling is stopped when the gas sampling volume reaches the minimum detection requirement, thereby ensuring the good air tightness of the entire device and avoiding the situation where the air pressure inside the device is too low due to insufficient sampling volume, or the air pressure inside the device is too high due to excessive sampling volume.

[0039] Furthermore, a protective pad 1011 is provided at the bottom of the base 101 to enhance the stability of the base 101 and prevent the sampling device from tipping over during operation, which could affect normal sampling. A sampling status display 1012 is provided on the base 101 and is connected to the detection assembly 303. The sampling status display 1012 is connected to the sampling device's main control circuit board and is responsible for data feedback and display, as well as general electronic control operations. A counterweight 1013 is provided within the base 101 to further enhance the stability of the base 101.

[0040] Furthermore, a charging module 102 electrically connected to the sampling pump 104 is provided on the base 101. The charging module 102 includes a Type-C interface provided on the base 101, and a charging power supply circuit for charging the sampling pump 104 through the Type-C interface. When the power is turned on, the charging module 102 supplies power to the sampling pump 104 and the entire sampling device. The charging module 102 is also electrically connected to the main control circuit board of the sampling device through the circuit.

[0041] During use, the user places the sampling device in the sampling space, sets the protective housing 301 and sampling cartridge 201 on the base 101, and then activates the power switch of the sampling pump 104. When the sampling pump 104 begins to operate and sample gas, ambient air first passes through the air inlet hole 2011 on the sampling cartridge 201 under the action of the sampling pump 104, then reaches the filter hole 2021 on the filter cartridge 202, and finally enters the air inlet space A connected to the filter hole 2021. The air entering the air inlet space A first contacts the partition seat 203, then enters the gas channel mounting seat 2031 through the one-way air inlet nozzle 2034, and then enters the interior of the detection unit 300 under the guidance of the detection unit connecting seat 2032. The expansion slot 2033 provided on the partition seat 203 can adapt to the changing air pressure inside the sampling device, preventing the airtightness of the sampling device from being affected in the event of excessive sampling gas and the sampling pump 104 not stopping operation.

[0042] In an optional embodiment, the gas sample to be tested passes through the detection unit connector 2032 and reaches the interior of the detection assembly 303. A portion of the gas passes through the formaldehyde detection tube 3032 and enters the detection chamber 3031, where it combines with the formaldehyde detection reagent preset in the detection chamber 3031 to produce a detection reaction. Meanwhile, another portion of the gas passes through the TC composite tube 3033 and enters the detection chamber 3031, where it combines with the TVOC detection reagent preset in the detection chamber 3031 to produce a detection reaction. The formaldehyde detection reagent and the TVOC detection reagent are separately installed in the detection chamber 3031. When the set sampling time ends and the sampling process is completed, the detection chamber 3031 containing the formaldehyde detection reagent and the TVOC detection reagent only needs to be removed, sealed, and directly returned to the laboratory for analysis of the TVOC and formaldehyde in the adsorption device. During the sampling process, formaldehyde and TVOC are detected in real time, and the detection results of the formaldehyde detection reagent and the TVOC detection reagent are fed back to the main control circuit board of the sampling device in real time through detection sensors existing in the prior art. The sampling device can be reused by replacing the detection chamber 3031, and the residual air inside it can also be discharged by not installing the detection chamber 3031 and idling the sampling pump 104 to avoid affecting the purity of the sample during repeated sampling.

[0043] In another optional embodiment, the TC composite tube 3033 also has a TVOC adsorption function. The gas sample to be tested enters the detection assembly 303 through the detection unit connector 2032. It first passes through the TVOC adsorption TC composite tube 3033, where it reacts with the TVOC detection reagent contained within the TC composite tube 3033. After the TVOC in the air is adsorbed by the TC composite tube 3033, the sample then passes through the formaldehyde absorption bottle containing the formaldehyde detection reagent within the detection chamber 3031. The absorption liquid in the formaldehyde absorption bottle absorbs the formaldehyde in the air. Once the set sampling time has elapsed, the sampling process is complete. Finally, the detection chamber 3031 and TC composite tube 3033 are simply removed, sealed, and returned to the laboratory for analysis of the TVOC and formaldehyde in the adsorption device. This entire process eliminates the need for on-site testing by personnel. Similarly, the sampling device can be reused by replacing the detection chamber 3031. Residual air inside the device can also be expelled by idling the sampling pump 104 without the detection chamber 3031, thus preventing the purity of the sample from being affected during repeated sampling.

[0044] In the above two embodiments, by setting up the detection unit 300, formaldehyde sampling and TVOC detection are integrated together in two different ways, and the overall sampling device is smaller in size; the sampling pump unit 100, the sampling unit 200 and the detection unit 300 are set separately, and when sampling, only the detection chamber 3031 needs to be replaced to realize the repeated use of the sampling equipment, reduce the number of consumables in the sampling process, reduce the volume of the working equipment, and save transportation costs and equipment costs; as long as the power is turned on and the sampling pump unit 100 and the sampling unit 200 are connected, the overall sampling device will automatically start working, and the operation is more convenient.

[0045] Preferably, a temperature sensor and a humidity sensor can be set inside the sampling device, and the sensing data of the temperature sensor and the humidity sensor can be uniformly fed back to the main control circuit board of the sampling device, and a Wi-Fi data transmission module can be set inside the sampling device, so that the air sampling volume of the sampling device and the formaldehyde TVOC detection data can be fed back to the user end in real time, and more accurate sampling results can be fed back to the user in combination with the environmental conditions. The above-mentioned main control circuit board and data transmission module are both online data management functions of common small detection equipment in the prior art, and do not belong to the main content of this technical solution, and will not be repeated in this embodiment.

[0046] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A portable formaldehyde TVOC sampling device, characterized by: include, A sampling pump unit (100) comprises a base (101) and a sampling pump (104) disposed in the base (101); The sampling unit (200) comprises a sampling cylinder (201) disposed on a base (101), a filter cylinder (202) disposed inside the sampling cylinder (201), and a partition seat (203) disposed inside the filter cylinder (202); and The detection unit (300) comprises a protective shell (301) disposed on the sampling cylinder (201), a sealing seat (302) disposed on the sampling cylinder (201) and located between the partition seat (203) and the protective shell (301), and a detection component (303) for detecting formaldehyde and TVOC; The enclosed space between the base (101) and the partition seat (203) is set as an air intake space, the enclosed space between the partition seat (203) and the sealing seat (302) is set as a one-way ventilation space, and the enclosed space between the sealing seat (302) and the protective shell (301) is set as a detection space, and the detection component (303) and the detection space are sealed with each other.

2. The portable formaldehyde TVOC sampling device according to claim 1, characterized in that: The sampling cylinder (201) is provided with an air inlet hole (2011); and the filter cylinder (202) is provided with a filter hole (2021).

3. The portable formaldehyde TVOC sampling device according to claim 2, characterized in that: The filter hole (2021) is connected to the air intake space.

4. The portable formaldehyde TVOC sampling device according to claim 3, characterized in that: The separator (203) is provided with a gas channel mounting seat (2031) located in the one-way ventilation space, the gas channel mounting seat (2031) is provided with a detection unit connecting seat (2032), the separator (203) is provided with a telescopic groove (2033), and the separator (203) is also provided with a one-way air inlet nozzle (2034) that is connected to the detection unit connecting seat (2032) and is located in the air inlet space.

5. The portable formaldehyde TVOC sampling device according to claim 4, characterized in that: The sealing seat (302) is provided with a detection assembly air inlet nozzle (3021) connected to the detection assembly (303), the sealing seat (302) is provided with a sampling gas conduit (3022) connected to the detection unit connection seat (2032), and the sealing seat (302) is also provided with a ventilation valve (3023) connected between the one-way ventilation space and the detection space.

6. The portable formaldehyde TVOC sampling device according to claim 5, characterized in that: The detection component (303) comprises a detection chamber (3031) arranged in the protective shell (301) and provided with a formaldehyde detection reagent and a TVOC detection reagent, a formaldehyde detection tube (3032) having one end connected to the formaldehyde detection reagent and the other end connected to the detection component air inlet nozzle (3021), and a TC composite tube (3033) having one end connected to the TVOC detection reagent and the other end connected to the detection component air inlet nozzle (3021).

7. The portable formaldehyde TVOC sampling device according to claim 6, characterized in that: A receiving plate (2022) located below the partition seat (203) is provided inside the filter cartridge (202), and an air intake groove (2023) for installing a one-way air intake nozzle (2034) is provided on the receiving plate (2022).

8. The portable formaldehyde TVOC sampling device according to claim 7, characterized in that: The sampling pump (104) is provided with a sampling pump mounting seat (103) connected to the base (101), and the sampling pump (104) is provided with an air pressure detector (1041).

9. The portable formaldehyde TVOC sampling device according to claim 8, characterized in that: A protective pad (1011) is provided at the bottom of the base (101), a sampling status display screen (1012) communicatively connected to the detection component (303) is provided on the base (101), and a counterweight block (1013) is provided inside the base (101).

10. The portable formaldehyde TVOC sampling device according to claim 9, characterized in that: The base (101) is provided with a charging module (102) electrically connected to the sampling pump (104).

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