CN212341142U - Formaldehyde rapid detection device capable of comparing climate box method - Google Patents
Formaldehyde rapid detection device capable of comparing climate box method Download PDFInfo
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- CN212341142U CN212341142U CN202020466762.1U CN202020466762U CN212341142U CN 212341142 U CN212341142 U CN 212341142U CN 202020466762 U CN202020466762 U CN 202020466762U CN 212341142 U CN212341142 U CN 212341142U
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Abstract
The embodiment of the application discloses but formaldehyde short-term test device of comparison weather case method, including the detection case, set up in air inlet, gas outlet on the tank wall of detection case, be used for form the gaseous circulation unit of the standard air of circulation in the detection case, be provided with sample detection frame, formaldehyde detecting element in the detection case, formaldehyde detecting element includes the formaldehyde sensor at least. The method has the advantages of relatively high detection efficiency, relatively simple operation method, high matching degree of the test result and the climate box method, and quick and accurate reading.
Description
Technical Field
The application relates to a formaldehyde detection equipment technical field, concretely relates to but quick detection device of formaldehyde of testing result contrast weather case method.
Background
Along with the development of science and technology, people increasingly recognize the harm of formaldehyde to human health. GB 18580 and 2017 Formaldehyde emission limit in indoor decoration and finishing material artificial boards and products thereof provide four formaldehyde detection methods, namely a climatic box method, a gas analysis method, a dryer method and a perforation extraction method, and limit values corresponding to various detection methods are specified. The detection principle of the climate box method is that a sample is placed in a climate box with the temperature, the relative humidity, the air flow rate and the air replacement rate controlled at certain values, formaldehyde is released from the sample and mixed with air in the climate box, the air in the climate box is periodically extracted, and the formaldehyde content in each cubic meter of air is calculated by dissolving the formaldehyde in the air into water. However, the climatic chamber method has a problem that a detection period is long, about 20 to 40 days is required, detection is time-efficient, and rechecking cannot be performed, so that the climatic chamber method has hysteresis and irreproducibility for quality control of a manufacturer, and difficulty in quality control of the manufacturer is increased.
Although national standards also allow manufacturers to measure formaldehyde emissions in quality control using a dryer method with relatively short measurement times. However, the dryer process has the following problems compared to the current standard climatic chamber process: firstly, the correlation between the two principles is low and the conversion between the detection results is difficult to realize, specifically, the detection principle of the dryer method is that a sample is placed into a closed dryer, a crystallizing dish filled with purified water is placed at the bottom of the dryer, the content of formaldehyde dissolved into water within 24 hours is calculated, and because the formaldehyde is continuously dissolved into the water within 24 hours of detection, the content of the formaldehyde in the water is in a continuously increasing state, the two different principles are adopted for maintaining the balance state with the content of the formaldehyde in the water of the climatic chamber method; secondly, enterprises are relatively lack of detection personnel with certain chemical knowledge and test capability, and the operation of the dryer method is complex, so that relatively high requirements are imposed on the chemical knowledge and test capability of operators, and the accuracy and consistency of detail control and reading in the test process are guaranteed.
In summary, a detection device with high detection efficiency, relatively simple operation method, and high matching degree between the test result and the climate box method is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming above-mentioned technical problem to a formaldehyde detection device is provided, it has the advantage that the matching degree of relatively higher detection efficiency, operation method are simple relatively, test result and weather case method is high, and the reading is quick, accurate.
In order to realize the above object, the utility model provides a but formaldehyde short-term test device of comparison weather case method, including the detection case, set up in air inlet, gas outlet on the tank wall of detection case, be used for form the gaseous circulation unit of the standard air of circulation in the detection case, be provided with sample detection frame, formaldehyde detecting element in the detection case, formaldehyde detecting element includes formaldehyde sensor at least.
By means of the structure, through forming the ventilation air in the detection box capable of forming the closed detection space, the formaldehyde content in the air in the detection box maintains the balance situation after the balance, so that the detection principle of the rapid formaldehyde detection device capable of comparing the climate box method is consistent with that of the climate box method, and the detection results of the formaldehyde detection device and the climate box method have comparability; meanwhile, the formaldehyde content in the air in the detection box is detected by using a formaldehyde detection unit (formaldehyde sensor), so that the test result can be read when the formaldehyde content in the air in the detection box reaches a stable state, and the formaldehyde content in the water is detected without waiting for the formaldehyde content dissolved in the water to reach the stable state, therefore, the time consumption of formaldehyde detection can be effectively shortened relatively, and the detection efficiency is improved; further, utilize formaldehyde detecting element to detect the formaldehyde content in this detection box air, make the testing result can be read fast, relatively easy, immediately to can avoid the testing result that artificial operating problem leads to inaccurate comparatively effectively, and do not have too high requirement to measurement personnel's chemical knowledge and experimental ability.
Preferably, the detection working surface of the sample detection frame is parallel to a gas flow direction formed by the gas flow unit in the detection box.
Preferably, the detection working surface of the sample detection frame, the air inlet and the air outlet are located in the same plane.
Preferably, the detection working surface of the sample detection frame is horizontally arranged, and the sample detection frame is located at a central position between the air inlet and the air outlet.
Preferably, the gas circulation unit comprises a gas suction device connected with the gas outlet and a standard air source connected with the gas inlet (210), and a flow rate meter is arranged between the gas inlet and the standard air source.
Preferably, the formaldehyde sensor is positioned at one side of the detection box close to the air outlet.
Preferably, the distance between the formaldehyde sensor and the air outlet is less than 15 cm.
Preferably, the formaldehyde sensor is a readable formaldehyde sensor.
Preferably, the formaldehyde detection unit further comprises an industrial personal computer in communication connection with the formaldehyde sensor and a digital display module in communication connection with the industrial personal computer.
Preferably, the formaldehyde rapid detection device capable of comparing with the climate box method further comprises a thermometer and a barometer which are arranged in the detection box.
To sum up, the utility model discloses a can compare formaldehyde quick detection device of weather case method has the advantages of relatively higher detection efficiency, operating method are simple relatively, the matching degree of test result and weather case method is high, the reading is quick and accurate etc.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a rapid formaldehyde detection device of example 1 of the present invention, which can compare with a climatic chamber method;
FIG. 2 is a schematic structural diagram of a rapid formaldehyde detection device of example 2 of the present invention, which can compare with the climatic chamber method;
FIG. 3 is a table comparing the test results of the rapid formaldehyde testing device of example 1 with the test results of the climate box method;
FIG. 4 is a table comparing the test results of the rapid formaldehyde testing device of example 2 with the test results of the climate box method;
fig. 5 is a schematic structural diagram of a formaldehyde detecting unit according to embodiment 3 of the present invention.
Reference numerals of the above figures: 100-a detection box, 210-an air inlet, 220-an air outlet, 230-an air circulation unit, 240-a flow meter, 300-a sample detection frame, 400-a formaldehyde detection unit, 410-a formaldehyde sensor, 420-an industrial personal computer, 430-a digital display module, 500-a thermometer and 600-a barometer.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example 1: referring to fig. 1, the formaldehyde rapid detection device capable of comparing with the climate box method comprises a detection box 100, an air inlet 210 and an air outlet 220 arranged on the wall of the detection box 100, and a gas circulation unit 230 for forming circulating standard air in the detection box 100, wherein a sample detection rack 300, a formaldehyde detection unit 400, a thermometer 500 and a barometer 600 are arranged in the detection box 100, and the formaldehyde detection unit 400 at least comprises a formaldehyde sensor 410. The detection box 100 can be a detection box with an air inlet 210 and an air outlet 220 on the box wall, or can be a container in other forms, the sample placing port can be arbitrarily set according to the convenience of lofting and sampling, and the other structures of the detection box 100 except the air inlet 210 and the air outlet 220 can be sealed as long as the sample placing port is closed.
By means of the structure, circulating standard air is formed in the detection box 100 capable of forming the closed detection space, and the formaldehyde content in the air in the detection box 100 maintains a balanced state after balance, so that the detection principle of the rapid formaldehyde detection device capable of comparing the climate box method is consistent with that of the climate box method, the detection results of the rapid formaldehyde detection device and the climate box method are contrastable, correlation exists between the detection results of the rapid formaldehyde detection device and the climate box method, and conversion between the detection results can be carried out through result correction; meanwhile, the formaldehyde content in the air in the detection box 100 is detected by using the formaldehyde detection unit 400 (formaldehyde sensor), so that the test result can be read when the formaldehyde content in the air in the detection box 100 reaches a stable state, and the formaldehyde content in the water does not need to be detected after the formaldehyde content dissolved in the water reaches the stable state, so that the time consumption of formaldehyde detection can be effectively shortened relatively, and the detection efficiency is improved; further, the formaldehyde content in the air in the detection box is detected by the formaldehyde detection unit 400, so that the detection result can be rapidly, relatively easily and immediately read, the inaccuracy of the detection result caused by artificial operation problems can be effectively avoided, and the requirements on chemical knowledge and test capability of detection personnel are not high.
The air inlet 210 of the present embodiment is provided on a pair of opposite walls of the detection box 100 at the same height as the air outlet 220 and correspondingly, the air circulation unit 230 includes an air suction device (such as an air sampler or an air pump) connected to the air outlet 220, and a standard air source (not shown in the figure, which may be in any form in the prior art, for example, an air purification processing system is added to the front end of the air inlet 210) connected to the air inlet 210, so as to draw air to the air outlet 220, thereby forming a uniform and horizontally-flowing standard air flow in the detection box 100. An air flow meter 240 is mounted on the air connection line of the air inlet 210 to the standard air supply.
The sample detection frame 300 is a rectangular metal frame structure and is placed at the bottom of the detection box 100, the top surface of the sample detection frame is a flat detection working surface which is horizontally arranged, and a sample is placed on the detection working surface, so that the sample is horizontally placed in the detection box 100. Preferably, the detection working surface of the sample detection frame 300, the air inlet 210 and the air outlet 220 are located in the same plane, specifically, the detection working surface passes through the connection surface between the air inlet 210 and the air outlet 220, that is, the detection working surface is located between the connection surface between the lower end of the air inlet 210 and the lower end of the air outlet 220 to the connection surface between the higher ends of the air inlet 210 and the air outlet 220, so that the detection working surface of the sample detection frame 300 is parallel to the air flowing direction of the air flowing unit 200 formed in the detection box 100. Further, the sample-detecting rack 300 is located at a central position between the air inlet 210 and the air outlet 220, so that the distance between the sample and the air inlet 210 and the air outlet 220 is the same.
In the present embodiment, the formaldehyde sensor 410 is a readable formaldehyde sensor (e.g., a german EC Sense formaldehyde gas sensor or other patch formaldehyde gas sensor). The formaldehyde sensor 410 is located at one side of the detection box 100 close to the air outlet 220, and the distance between the formaldehyde sensor and the air outlet 220 is less than 15 cm. For example, the formaldehyde sensor 410 is fixedly hung in a box wall on the side where the air outlet 220 is opened, and the distance from the air outlet 220 is 2 cm.
Example 2: embodiment 2 differs from embodiment 1 in that, referring to fig. 2, the air inlet 210 is opened on the bottom plate of the detection box 100, the air outlet 220 is correspondingly opened on the top wall of the detection box 100, and the air circulating unit 230 is an air pump communicated with a standard air source, and standard air is introduced into the air inlet 210, so as to form a vertically circulating standard air flow in the detection box 100. The flow rate meter 240 is provided in a gas connection line between the gas flow cell 230 and the gas inlet 210. The sample detection frame 300 adopts a sample support and a sample placing method thereof specified in 4.59.2.3 of GB/T17657 plus 2013 physicochemical property test method for artificial boards and veneered artificial boards, and a connecting line of the air inlet 210 and the air outlet 220 passes through the central axis of the sample detection frame 300, so that any detection working surface of the sample detection frame 300 can be positioned in the same plane with the air inlet 210 and the air outlet 220, and the comparability of a detection result is ensured.
The detection method of the formaldehyde rapid detection device capable of comparing with the climate box method in the embodiment 1 and the embodiment 2 comprises the following steps:
firstly, a sample to be detected is placed on a sample detection frame 300 of a detection box 100, and the surface area of the sample is 40-80cm2Placing the detection box 100 in a constant temperature environment, ensuring the temperature in the detection box 100 to be 23 +/-0.5 ℃, standing for 24 hours, and reading the reading of the formaldehyde sensor 410;
secondly, opening the gas circulation unit 230 to form a gas flow of 0.1m/s-0.3m/s standard air in the detection box 100, ensuring that the air pressure in the detection box 100 is 1 atmosphere, monitoring the gas flow rate and the air pressure in real time through the flow rate meter 240 and the barometer 600, and manually adjusting the gas circulation unit 230 to realize control, or electrically connecting or connecting the gas circulation unit 230, the flow rate meter 240 and the barometer 600 to a PLC control system through signals, and enabling the PLC control system to control an adjusting valve of the gas circulation unit 230 to adjust the flow rate and the air pressure through the flow rate and the air pressure fed back by the flow rate meter 240 and the barometer 600;
thirdly, when the formaldehyde content in the air in the detection box 100 is stable, namely the deviation between two continuous readings is less than 0.2%, reading the reading of the formaldehyde sensor 410 again, wherein the reading is the detection result of the test.
The comparison table of the detection result of the formaldehyde rapid detection device adopting the comparative climate box method of the embodiment 1 and the detection result of the climate box method is shown in fig. 3; the comparison table of the test results of the formaldehyde rapid test device using the climate box method comparable to that of example 2 and the test results of the climate box method is shown in fig. 4.
Example 3: the difference between the embodiment 3 and the embodiment 1 or 2 is that, referring to fig. 4, the formaldehyde detection unit 400 further includes an industrial personal computer 420 in communication connection with the formaldehyde sensor 410, and a digital display module 430 (which may be any one of liquid crystal displays in the prior art) electrically connected to the industrial personal computer 420. Therefore, the formaldehyde content monitored by the formaldehyde sensor 410 is transmitted to the industrial personal computer 420, and data conversion is performed in the industrial personal computer 420, so that the converted detection result of the climate box method is directly displayed in the digital display module 430.
The foregoing description is for the purpose of illustration and is not for the purpose of limitation. Many embodiments and many applications other than the examples provided will be apparent to those of skill in the art upon reading the above description. The scope of the present teachings should, therefore, be determined not with reference to the above description, but should instead be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled. The disclosures of all articles and references, including patent applications and publications, are hereby incorporated by reference for all purposes. The omission in the foregoing claims of any aspect of subject matter that is disclosed herein is not intended to forego the subject matter and should not be construed as an admission that the applicant does not consider such subject matter to be part of the disclosed subject matter.
Claims (10)
1. The formaldehyde rapid detection device capable of comparing with a climate box method is characterized by comprising a detection box (100), an air inlet (210) and an air outlet (220) which are arranged on the wall of the detection box (100), and a gas circulation unit (230) which is used for forming circulating standard air in the detection box (100), wherein a sample detection frame (300) and a formaldehyde detection unit (400) are arranged in the detection box (100), and the formaldehyde detection unit (400) at least comprises a formaldehyde sensor (410).
2. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 1, wherein the detection working plane of the sample detection rack (300) is parallel to the gas flow direction formed by the gas flow unit (230) in the detection box (100).
3. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 2, wherein the detection working surface of the sample detection rack (300), the air inlet (210) and the air outlet (220) are located in the same plane.
4. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 3, wherein the detection working surface of the sample detection rack (300) is horizontally disposed, and the sample detection rack (300) is located at a central position between the air inlet (210) and the air outlet (220).
5. The apparatus for rapidly detecting formaldehyde according to the comparative climate box method of claim 1, wherein the gas circulation unit (230) comprises a gas suction device connected to the gas outlet (220), and a standard air source connected to the gas inlet (210), and a flow rate meter (240) is disposed between the gas inlet (210) and the standard air source.
6. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 1, wherein the formaldehyde sensor (410) is located at a side of the detection box (100) near the air outlet (220).
7. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 6, wherein the distance between the formaldehyde sensor (410) and the air outlet (220) is less than 15 cm.
8. The apparatus for rapid detection of formaldehyde according to the comparative climate box method of claim 1, wherein the formaldehyde sensor (410) is a readable formaldehyde sensor.
9. The device for rapidly detecting formaldehyde by comparing with the climate box method according to claim 1, wherein the formaldehyde detection unit (400) further comprises an industrial personal computer (420) in communication connection with the formaldehyde sensor (410) and a digital display module (430) in communication connection with the industrial personal computer (420).
10. The apparatus for rapidly detecting formaldehyde according to the comparative climate box method of claim 1, further comprising a thermometer (500) and a barometer (600) disposed in the detection box (100).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649578A (en) * | 2021-01-13 | 2021-04-13 | 杭州浩羽生物科技有限公司 | Aquatic product formaldehyde detection device and detection method |
| CN112816636A (en) * | 2021-01-13 | 2021-05-18 | 杭州浩羽生物科技有限公司 | Portable formaldehyde detection sealed cabin and use method thereof |
| CN113655180A (en) * | 2021-08-23 | 2021-11-16 | 安徽省汉博科技有限公司 | High-precision furniture formaldehyde detection device and method |
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2020
- 2020-04-02 CN CN202020466762.1U patent/CN212341142U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649578A (en) * | 2021-01-13 | 2021-04-13 | 杭州浩羽生物科技有限公司 | Aquatic product formaldehyde detection device and detection method |
| CN112816636A (en) * | 2021-01-13 | 2021-05-18 | 杭州浩羽生物科技有限公司 | Portable formaldehyde detection sealed cabin and use method thereof |
| CN113655180A (en) * | 2021-08-23 | 2021-11-16 | 安徽省汉博科技有限公司 | High-precision furniture formaldehyde detection device and method |
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