A formaldehyde sampling device

Abstract

The present invention relates to the field of air detection technology, and specifically discloses a formaldehyde sampling device, including a sampling box, in which a sampler and an accessory box are arranged; a plurality of absorption bottles are installed on the sampler, and a detachable sealing cover is arranged at the connecting port of the absorption bottle, and a quantitative reagent powder is sealed in the absorption bottle; a connecting tube, an air inlet needle, and a plurality of reagent bottles are collected in the accessory box, and a quantitative distilled water is contained in the reagent bottle, and the connecting tube can connect the air inlet on the sampler and the side opening of the absorption bottle; when the distilled water is poured into the absorption bottle, one end of the air inlet needle extends into the absorption bottle and the opening is located below the liquid level, and the other end of the air inlet needle is arranged outside the absorption bottle and is sealed and connected to the absorption bottle. With the device of the present invention, ordinary operators only need simple operations to complete the configuration of the absorption liquid and the simple assembly of the connecting tube, the air inlet needle, and the absorption bottle, and then complete the collection of formaldehyde samples, thereby improving the possibility of popularizing indoor formaldehyde detection.

Description

Technical Field

[0001] The invention relates to the technical field of air detection, and in particular to a formaldehyde sampling device. Background Art

[0002] With the continuous standardization of the home decoration market, people's requirements for residential decoration are getting higher and higher. In addition to paying attention to the quality of decoration materials and construction quality, the quality of indoor air after decoration has also attracted people's keen attention. Formaldehyde is one of the main pollutants in indoor air after decoration. Formaldehyde is a carcinogenic substance that has toxic effects on the nervous system, immune system, liver, etc.

[0003] The national standard detection method for indoor air formaldehyde includes the phenol reagent method, which uses a sampler to sample formaldehyde in the air, such as Figure 1 As shown, the sampler 2 is provided with an air pump (not shown), a flow meter 23, a timer 24, a tripod, an absorption bottle 17, an air inlet needle 16, and an air inlet pipe 11, wherein the flow meter 23 controls the sampling flow, the timer 24 records the sampling time, the air inlet pipe 11 connects the air pump and the absorption bottle 17, the bottom end of the air inlet needle 16 is inserted below the liquid level in the absorption bottle 17, and the upper end extends to the outside of the absorption bottle 17 and is tightly combined with the bottle mouth of the absorption bottle; during sampling, the air pump draws in air along the direction of the arrow, so that the air to be tested passes through the absorption liquid, and the absorption liquid absorbs the formaldehyde in the air to complete the formaldehyde sampling. Since the shelf life of the absorption liquid is very short, before sampling, professionals are required to complete the preparation of the absorption liquid and the assembly of various components on site. The shelf life of the absorption liquid, the highly professional preparation of the absorption liquid, and the complex assembly of components make it necessary for professionals to come to the door for sampling for family formaldehyde detection, but the door-to-door method of professionals greatly increases the financial and human resources investment of the detection agency and the family to be tested, limiting the popularity of this detection service. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a formaldehyde sampling device. When the device is used for air sampling, there is no need for professionals to be present in person, and ordinary people can complete the sampling of indoor air formaldehyde through simple operations.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A formaldehyde sampling device comprises a sampling box, wherein a sampler and an accessory box are arranged in the sampling box;

[0007] The sampler is equipped with a plurality of absorption bottles, the communication ports of the absorption bottles are provided with detachable sealing covers, and a certain amount of reagent powder is sealed in the absorption bottles; the accessory box is equipped with a connecting tube, an air inlet needle, and a plurality of reagent bottles, and the reagent bottles are filled with a certain amount of distilled water, one end of the connecting tube is detachably connected to the air inlet port on the sampler, and the other end is detachably connected to the absorption bottle;

[0008] When the distilled water is poured into the absorption bottle, one end of the air inlet needle extends into the absorption bottle with its opening below the liquid level, and the other end of the air inlet needle is arranged outside the absorption bottle and the air inlet needle is sealed and connected to the absorption bottle.

[0009] Preferably, the sampler is provided with a sealed cavity, the sealed cavity is provided with a protective cover, and the absorption bottle is arranged in the sealed cavity.

[0010] Preferably, a refrigeration device is provided in the sealed cavity.

[0011] Preferably, the refrigeration device is a semiconductor refrigerator.

[0012] Preferably, a vibrating device abutting against the absorption bottle is provided at the lower end of the absorption bottle.

[0013] Preferably, a buffer layer is provided between the absorption bottle and the vibration device.

[0014] Preferably, the vibration device is a vibration motor, and the buffer layer is a cotton layer.

[0015] Preferably, a temperature sensor and an air pressure sensor are provided on the side wall of the sealed cavity.

[0016] Preferably, the device further comprises a controller, which is electrically connected to the vacuum pump, the vibration device, the refrigeration device, the temperature sensor, the air pressure sensor, the flow meter and the timer on the sampler respectively.

[0017] Preferably, the device further comprises a display, wherein the display is electrically connected to the controller.

[0018] Compared with the prior art, the present invention provides a sampling box so that basic equipment such as a sampler, a connecting tube, an air inlet needle, a tripod, etc. can be collected in the sampling box for easy transportation; an accessory box is provided for collecting the above-mentioned connecting tubes, air inlet needles, reagent bottles, etc. basic equipment to prevent the equipment from being collected in a disorderly manner in the sampling box, thereby protecting the basic equipment; when a certain amount of distilled water in the reagent bottle is completely poured into the absorption bottle, a certain amount of reagent powder in the absorption bottle is dissolved in a certain amount of distilled water to prepare an absorption liquid with a concentration that meets the requirements; the connection of the connecting tube, the air inlet needle, and the absorption bottle only requires a simple insertion of the air inlet needle into the absorption bottle and the connection of the absorption bottle and the air inlet of the sampler with the connecting tube; the above-mentioned operation does not require professional operation and can be performed by ordinary personnel, so that when it is necessary to check the indoor air quality, the detection agency only needs to send the formaldehyde sampling device to the destination, and ordinary operators only need to perform simple operations to complete the configuration of the absorption liquid and the assembly of the connecting tube, the air inlet needle, and the absorption bottle, thereby completing the collection of the formaldehyde sample, without the need for professionals to be present on site, thereby reducing the cost of formaldehyde sample collection and increasing the possibility of popularizing formaldehyde detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described with reference to the accompanying drawings and specific embodiments:

[0020] Figure 1 It is a schematic diagram of the structure of the traditional method of using a sampler to collect indoor formaldehyde samples;

[0021] Figure 2 It is a structural schematic diagram of the sampling box of the present invention;

[0022] Figure 3 It is a schematic diagram of the structure of the sampler of the present invention;

[0023] Figure 4 It is a structural schematic diagram of the absorption bottle of the present invention;

[0024] Figure 5 It is a schematic structural diagram of the air intake needle of the present invention;

[0025] Figure 6 It is a partial structural schematic diagram of the absorption bottle and the air inlet needle of the present invention installed in the sampler;

[0026] Figure 7 It is a schematic diagram of the structure of the formaldehyde sampling device of the present invention when it is in use.

[0027] In the figure:

[0028] 1. Sampling box, 2. Sampler, 3. Accessory box, 4. Tripod placement area, 5. Flow meter, 6. Touch screen, 7. Partition plate, 8. Observation window, 9. Second air inlet, 10. Side opening, 11. Connecting pipe, 12. Protective cover, 13. Installation position, 14. First air inlet, 15. Reagent powder, 16. Air inlet needle, 17. Absorption bottle, 18. Sealing cover, 19. Sealing chamber, 20. Vibration device, 21. Refrigeration device, 22. Reagent bottle, 23. Flow meter, 24. Timer, etc. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0030] like Figures 2 to 7 As shown, this embodiment discloses a formaldehyde sampling device, including a sampling box 1, in which a sampler 2 and an accessory box 3 are arranged;

[0031] A number of absorption bottles 17 are installed on the sampler 2, and a detachable sealing cover 18 is provided at the connecting port of the absorption bottle 17, and a quantitative reagent powder 15 is sealed in the absorption bottle 17; the accessory box 3 collects a connecting tube 11, an air inlet needle 16, and a number of reagent bottles 22, and the reagent bottles contain a quantitative distilled water. One end of the connecting tube 11 is detachably connected to the air inlet (i.e., the first air inlet 14) on the sampler 2, and the other end is detachably connected to the absorption bottle 17 (connected to the measuring opening 10 on the absorption bottle 17); when distilled water is poured into the absorption bottle 17, one end of the air inlet needle 16 extends into the absorption bottle 17 and the opening is located below the liquid level, and the other end of the air inlet needle 16 is arranged outside the absorption bottle 17 and the air inlet needle 16 is sealed and connected to the absorption bottle 17. In other words, the air inlet (i.e., the second air inlet 9) of the air inlet needle 16 is located outside the absorption bottle 17.

[0032] In this embodiment, a sealed cavity 19 is provided on the sampler 2, a protective cover 12 is provided on the sealed cavity 19, and an absorption bottle 17 is provided in the sealed cavity 19; a refrigeration device 21 is provided in the sealed cavity 19, and the refrigeration device 21 is provided around the absorption bottle 17; the refrigeration device 21 includes a plurality of semiconductor refrigerators, a temperature insulation layer is provided on the cavity wall of the sealed cavity 19, and a temperature sensor and an atmospheric pressure sensor 13 are installed on the cavity wall of the sealed cavity 19.

[0033] In this embodiment, a vibration device 20 is provided at the lower end of the absorption bottle 17 to abut against the absorption bottle 17; a buffer layer is provided between the absorption bottle 17 and the vibration device 20; the vibration device 20 is a vibration motor, and the buffer layer is a cotton layer.

[0034] Compared with the prior art, the present invention provides a sampling box 1 so that basic equipment such as a sampler 2, a connecting tube 11, an air inlet needle 16, a tripod 4, etc. can be collected in the sampling box 1 for easy transportation; an accessory box is provided for collecting the above-mentioned connecting tube 11, air inlet needle 16, reagent bottle 22, etc. basic equipment to prevent the equipment from being collected in a disorderly manner in the sampling box 1, thereby protecting the basic equipment; when a certain amount of distilled water in the reagent bottle 22 is completely poured into the absorption bottle 17, a certain amount of reagent powder 15 in the absorption bottle is dissolved in a certain amount of distilled water to prepare an absorption liquid with a concentration that meets the requirements; the connection of the connecting tube 11, the air inlet needle 16, and the absorption bottle 17, It is only necessary to simply insert the air inlet needle 16 into the absorption bottle 17 and connect the measuring opening 10 of the absorption bottle 17 and the air inlet 14 of the sampler 2 with the connecting tube 11. The above operation does not require professional operation and can be performed by ordinary personnel. Therefore, when it is necessary to check the indoor air quality, the detection agency only needs to send the formaldehyde sampling device to the destination. Ordinary operators only need to perform simple operations to complete the absorption liquid configuration and the single assembly of the connecting tube 11, the air inlet needle 16, and the absorption bottle 17, and then complete the collection of formaldehyde samples. There is no need for professionals to visit the site in person, which reduces the cost of formaldehyde sample collection and increases the possibility of popularizing formaldehyde sample collection. The collection box contains the instruction manual for the device, and ordinary people can also complete the indoor air formaldehyde sampling operation under the guidance of the manual.

[0035] Furthermore, due to the limited shelf life of the absorption liquid and the absorption liquid that has absorbed formaldehyde (i.e., the formaldehyde sample), under normal conditions, the formaldehyde sample needs to be sent back to the laboratory within 24 hours to complete quantification. These limitations are also the main reasons for limiting remote mail-based sampling. In this embodiment, the absorption liquid is configured on-site and a sealed chamber 19 and a refrigeration device 21 are provided. Before formaldehyde sampling, the reagent powder 15 and the distilled water are separated, thereby extending the shelf life of the absorption liquid. After the formaldehyde sample is collected, the sealed chamber 19 is covered and the refrigeration device 21 is started, so that the collected formaldehyde sample is stored at a low temperature, thereby extending the validity period of the sample and ensuring the reliability of sending the sampling device out or back to the testing agency by mail.

[0036] In this embodiment, a buffer is provided in the accessory box 3 to prevent the basic equipment collected in the accessory box 3 from shaking and colliding and being damaged; further, the buffer is provided with a groove having a shape adapted to the shape of the basic equipment (such as the connecting tube 11, the air inlet needle 16, the reagent bottle 22, etc.) collected in the accessory box 3, and the connecting tube 11, the air inlet needle 16, the reagent bottle 22, etc. are collected in the corresponding groove.

[0037] In this embodiment, the quantitative reagent powder 15 sealed in the absorption bottle 17 is a powder mixed with sodium sulfate and phenol reagent in a certain ratio, such as sodium sulfate and phenol reagent mixed in a ratio of 39.9:0.1. Before sampling, 0.10g of the reagent powder 15 is weighed and sealed in the absorption bottle. In this embodiment, the color of the absorption bottle is brown, and the brown absorption bottle can protect the reagent powder 15 from light. The reagent powder 15 can be stored for about 1 month under light-proof conditions, which greatly prolongs the storage time of the absorption liquid. In this embodiment, a vibration device 20 is provided, so that after distilled water is poured into the absorption bottle, the absorption bottle 17 is vibrated by the vibration device 20, so as to promote the dissolution of the powder in water to make the absorption liquid, and at the same time ensure that the reagent powder 15 is completely dissolved in the distilled water, thereby ensuring that the concentration of the absorption liquid meets the requirements and reducing the error of the detection.

[0038] In this embodiment, the connecting hole of the absorption bottle includes a top opening and a side opening 10, and the top opening and the side opening 10 are provided with external threads or internal threads. The inner wall of the sealing cover 18 used to cover the top opening and the side opening 10 is correspondingly provided with external threads or internal threads, and a sealing gasket is also provided in the sealing cover 18. The sealing cover 18 cooperates with the sealing gasket to seal the reagent powder 15 and the formaldehyde sample in the absorption bottle, ensuring that the reagent powder 15 will not deteriorate and the sample will not be lost during transportation.

[0039] In this embodiment, the sealed cavity 19 is a cube arranged on the side wall of the sampler 2, and the outer contour of the cube is consistent with the side shape of the sampler 2. An interlayer plate is arranged in the cube, and the interlayer plate divides the cube into two layers, and a plurality of side-by-side through holes are arranged on the interlayer plate. The absorption bottle passes through the through holes and is fixed on the interlayer plate and seals the lower cavity; at least two strip-shaped vibration motors are arranged on the lower side of the cube, and the vibration motor is arranged close to the side wall of the absorption bottle through a cotton layer. The cotton layer can transmit the vibration frequency of the vibration motor to the distilled water to ensure the mixing of the distilled water and the reagent powder 15 in the absorption bottle 17, and can also protect the absorption bottle 17 to prevent the vibration motor from damaging the absorption bottle; the refrigeration device 21 is arranged in the lower cavity of the cube, and preferably, it is arranged around the bottom end of the absorption bottle to ensure the refrigeration effect. In this embodiment, after the formaldehyde sampling is completed, the semiconductor refrigerator at the bottom of the absorption bottle is cooled for 30 minutes, and then the semiconductor refrigerator is turned off to ensure transportation safety. The sealed lower layer of the cube prevents cooling leakage and ensures that the absorption bottle is in a low temperature state.

[0040] In this embodiment, when the absorption bottle 17 is installed in the sealed cavity 19 , the side opening 10 of the absorption bottle 17 penetrates the wall of the sealed cavity 19 to extend outside the sealed cavity 19 .

[0041] In this embodiment, a protective cover 12 is provided at the top of the sealed cavity 19. After opening the protective cover 12, the air inlet needle 16 can be inserted into the absorption bottle from the top of the sealed cavity 19. An observation window 8 or a transparent observation area is provided on the sealed cavity 19. During sampling, bubbles will be generated when the gas enters the absorption bottle. The sampling personnel can determine the ventilation conditions of the absorption bottle being sampled and the corresponding number and other information through the observation window 8 or the transparent observation area, which is convenient for checking the sample number and other information.

[0042] In this embodiment, a temperature sensor and an air pressure sensor are disposed on the side wall of the sealed cavity 19 . In other words, an installation position 13 for the temperature sensor and the air pressure sensor is disposed on the side wall of the sealed cavity 19 .

[0043] In this embodiment, a controller and a display are also included. The controller and the display are arranged on the sampler 2. The controller is electrically connected to the vacuum pump, the vibration device 20, the refrigeration device 21, the flow meter 5 on the sampler 2, the timer, the temperature sensor, the air pressure sensor, and the display on the sampler 2 respectively; the display is used to display the numerical values ​​collected by the flow meter 5, the timer, the temperature sensor, the air pressure sensor, etc. Further, the display is a touch screen 6, which is used to input operating instructions to the controller, such as inputting start instructions or stop working instructions for the vacuum pump, the vibration device 20, and the refrigeration device 21. After receiving these instructions, the controller controls the vacuum pump, the vibration device 20, the refrigeration device 21, etc. to start or stop working.

[0044] According to the national standard method, the phenol reagent method for testing formaldehyde content in household air can be divided into three stages: before sampling, during sampling and after sampling. When sampling on site, it is generally necessary to follow Figure 1 Various accessories are combined in a certain way. When sampling, environmental conditions such as temperature and humidity need to be measured. The sampling time, sampling flow rate and sample information also need to be recorded in detail. In the prior art, to complete the accurate recording of environmental information and sample information of the process, professionals are still required to complete it on site. The manpower and resource investment of this part greatly increases the cost of formaldehyde detection in home environment air. Moreover, these tasks are cumbersome, and there are random errors in the operation of different personnel, and the accuracy of the detection cannot be guaranteed. In this embodiment, by setting a controller and a touch screen 6, the current data is automatically collected through a flow meter 5, a timer, a temperature sensor, and an air pressure sensor, and is saved in the controller and then displayed through the touch screen 6, so that data collection is intelligent, the accuracy of the detection data is improved, the investment of professionals is reduced, the detection cost is reduced, and it becomes possible for ordinary people to operate the collection device.

[0045] For example, after the sampling personnel unscrew the top opening and the side opening 10, they pour a fixed volume of distilled water in the reagent bottle into the absorption bottle 17, insert the air inlet needle 16 into the absorption bottle 17, turn on the power, click the mixing button in the touch screen 6, start the vibration device 20 (i.e., the vibration motor 20), and promote the powder to dissolve in water; after the absorption liquid is prepared, the sampling personnel manually connect the connecting tube 11 to the side opening 10 of the absorption bottle 17 and the air inlet (i.e., the first air inlet 14) of the sampling pump at the corresponding sampling point, click the sampling button in the touch screen 6, and the sampling pump will be started, and the sampler 2 will extract gas at a fixed flow rate through the absorption liquid in the absorption bottle. , complete the sampling (such as 20 minutes), after the sampling is completed, the controller calculates the standard sampling volume (L) of the sample according to the temperature, air pressure, sampling flow rate and time, and saves the sample information; after all the samples are sampled, pull out the air inlet needle 16 and put it back to the corresponding position of the accessory box 3, tighten the sealing cover 18 of the absorption bottle 17, click the refrigeration button on the touch screen 6, keep the semiconductor refrigerator refrigerated for 30 minutes, put the sampler 2 and the accessory box 3 back to the corresponding position of the sampling box 1, cover it, and complete the whole sampling process; in the above process, the touch screen 6 displays real-time temperature, air pressure, standard sampling volume and sample number and other information. In other words, the touch screen 6 includes input command keys for power, mixing, sampling and refrigeration, among which the power is turned on before the solution is mixed and turned off after the refrigeration program is completed. In this embodiment, the step of starting the vibration device 20 and the step of connecting the connecting tube 11 can be interchanged.

[0046] The touch screen 6 of the present embodiment may also be used only for display, and input instructions for power supply, mixing, sampling and refrigeration, etc. are controlled by keys connected to the control.

[0047] In this embodiment, the sampler 2, the mixing device (i.e., the vibration device 20), the refrigeration device (i.e., the cooling device 21), the temperature sensor, the air pressure sensor, the controller, the display, etc. are packaged into one (i.e., arranged on the sampling box 1). In the preparation before sampling, the sampling device can be assembled and debugged by the professional personnel of the detection unit and then collected in the sampling box 1. The debugged sampling device is then delivered to the on-site sampling personnel (who can be non-professionals) by express delivery or other means of transportation. The sampling personnel only need to follow the instruction manual of the sampler 2 and complete the preparation of the absorption liquid, instrument assembly, sample collection and storage process through simple operating steps. During the whole process, the sampling personnel do not need to contact the absorption liquid or perform any precise quantitative operations, which greatly reduces the difficulty of sampling. At the same time, it eliminates the trouble of carrying the absorption liquid, absorption bottle and other accessories used for sampling or testing separately, and prevents the occurrence of omissions or wrong sampling accessories.

[0048] In this embodiment, the flow rate of the flow meter 5 is fixed and the sampling time is fixed. For example, the sampling flow rate is 0.5L / min and the sampling time is 20 minutes. The sampling flow rate of the sampler 2 is calibrated by professionals before and after going out for sampling. No further debugging is required during the sampling process, thereby simplifying the operating steps for non-professionals and promoting the universalization of the detection device.

[0049] In this embodiment, a temperature sensor and an air pressure sensor are installed near the air inlet needle 16, which can detect and display the test point temperature and atmospheric pressure in real time, and use the ideal gas state equation to calculate the standard injection volume of each sample based on the temperature and atmospheric pressure values, eliminating the trouble of manually detecting the temperature and air pressure and manually converting them into standard volumes; fixed flow rate and sampling time can reduce random errors caused by manual timing and adjustment of the sampling flow rate.

[0050] The sampling device of this embodiment is designed according to the usage habits of non-professionals to ensure the simplicity / intelligence and accuracy of the sampling operation. By using this sampling device, gas samples that meet the detection requirements can be collected without the presence of professionals, which can save 40% to 50% of the cost of household air quality detection; the use of a powder mixed with phenol reagent and sodium sulfate can ensure the timeliness of the absorbent, and each sample corresponds to a portion of powder. 0.1g of phenol reagent can test nearly 400 samples. Compared with the traditional method, the absorption stock solution prepared with 0.1g of phenol reagent is stored for 3 days. The use of this powder saves the cost of reagents and reduces the pollution problem caused by residual reagents.

[0051] In this embodiment, a tripod placement area 4 is provided in the sampling box 1, and the tripod is collected in the tripod placement area 4. The tripod mainly plays the role of supporting the sampler 2 during the sampling process. The height of the tripod is adjusted during sampling to ensure that the height range of the air inlet needle 16 is between 1.1m and 1.5m.

[0052] In this embodiment, the size of the sampling box 1 is designed according to the size of the compartment in the express box, and the inner wall of the sampling box 1 is provided with a sponge layer for protection to prevent the sampler 2 and accessories from being damaged, thereby facilitating mailing.

[0053] When a family has a need for formaldehyde detection, the family submits a detection commission to the detection unit. The commissioning agency debugs the instrument in the sampling box 1 in advance, and then sends the sampling device to the family by express delivery or other means of transportation; the operator takes out the sampler 2, accessory box 3, tripod 4, absorption bottle, connecting pipe 11, air inlet needle 16 and other equipment from the sampling box 1, opens the protective cover 12 of the sealed cavity 19 and then unscrews the sealing cover 18 of the absorption bottle, pours the quantitative distilled water in the reagent bottle 22 into the absorption bottle, and then inserts the air inlet needle 16 into the absorption bottle from the top opening to a position below the liquid level, and finally connects the connecting pipe 11 to the side opening 10 of the absorption bottle and the air inlet of the vacuum pump, thereby completing the sampling. The assembly of the sampling device is simple and can be completed by non-professionals. After the instrument is assembled, turn on the power and start the vibration device 20 to dissolve the reagent powder 15 in the absorption bottle in water to make an absorption liquid. Then start the sampler 2 to start sampling the formaldehyde sample. When each absorption bottle has completed the sampling of the sample, the air inlet needle 16, the connecting tube 11, and the tripod 4 are collected from the sampler 2 and collected in the accessory box 3. The sealing cover 18 reseals the absorption bottle, and the protective cover 12 re-covers the sealing cavity 19. Then start the refrigeration device 21 to refrigerate for 30 minutes, then put the sampler 2 and the accessory box 3 back into the sampling box 1, and finally send the sampling device back to the testing department for quantification. The entire sampling process and sample delivery process do not require professional personnel to come to the site, and ordinary personnel can complete all operations.

[0054] The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims and equivalent technologies of the present invention, the present invention is also intended to include these changes and modifications.

Claims

1. A formaldehyde sampling device, characterized in that: It comprises a sampling box, in which a sampler and an accessory box are arranged; The sampler is provided with a plurality of absorption bottles, the communication ports of the absorption bottles are provided with detachable sealing covers, and a certain amount of reagent powder is sealed in the absorption bottles; The accessory box contains a connecting tube, an air inlet needle, and several reagent bottles, wherein the reagent bottles contain a certain amount of distilled water; one end of the connecting tube is detachably connected to the air inlet on the sampler, and the other end is detachably connected to the absorption bottle; When the distilled water is poured into the absorption bottle, one end of the air inlet needle is inserted into the absorption bottle with the opening below the liquid level, and the other end of the air inlet needle is arranged outside the absorption bottle and the air inlet needle is sealed and connected to the absorption bottle; The sampler is provided with a sealed cavity, the sealed cavity is provided with a protective cover, and the absorption bottle is arranged in the sealed cavity; A refrigeration device is provided in the sealed cavity; The refrigeration device includes a plurality of semiconductor refrigerators; The lower end of the absorption bottle is provided with a vibration device abutting against the absorption bottle; A buffer layer is provided between the absorption bottle and the vibration device; The vibration device includes a plurality of vibration motors, and the buffer layer is a cotton layer; The sealed cavity is a cube arranged on the side wall of the sampler, and the outer contour of the cube is consistent with the side shape of the sampler. A partition plate is arranged in the cube, and the partition plate divides the cube into two layers, and the partition plate is provided with a plurality of side-by-side through holes. The absorption bottle passes through the through holes and is fixed on the partition plate and seals the lower cavity; at least two strip-shaped vibration motors are arranged on the lower side of the cube, and the vibration motor is arranged closely to the side wall of the absorption bottle through the cotton layer, and the refrigeration device is arranged in the lower cavity of the cube, and the refrigeration device is arranged around the bottom end of the absorption bottle.

2. The formaldehyde sampling device according to claim 1, characterized in that: A temperature sensor and an air pressure sensor are arranged on the side wall of the sealed cavity.

3. The formaldehyde sampling device according to claim 2, characterized in that: It also includes a controller, which is electrically connected to the vacuum pump, the vibration device, the refrigeration device, the temperature sensor, the air pressure sensor, the flow meter on the sampler, and the timer on the sampler.

4. The formaldehyde sampling device according to claim 3, characterized in that: A display is also included, and the display is electrically connected to the controller.

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