阅读说明：本技术 一种高精度家具甲醛检测装置及方法 (High-precision furniture formaldehyde detection device and method ) 是由 秦朦朦 于 2021-08-23 设计创作，主要内容包括：本发明涉及一种高精度家具甲醛检测装置及方法,涉及家具甲醛测试技术领域,包括测试罩、甲醛监测架、驱动装置、气密组件、空气净化组件及抽吸循环组件；所述甲醛监测架用于放置及监测家具样品,且甲醛监测架滑动设于测试罩内且由驱动装置驱动,并通过气密组件构建甲醛监测架与测试罩的密封测试环境；所述空气净化组件及抽吸循环组件分别连通测试罩两侧,用以构建测试罩的标准气体测试环境。本发明可提供气密性好且高精度标准气体测试环境,可最大程度排除外界因素的干扰,以获取高精度的数据,相比于传统采集空气样品进行检测获取数据的方式,工作量降低,效率提高,数据直观性强。(The invention relates to a high-precision furniture formaldehyde detection device and method, relating to the technical field of furniture formaldehyde test, and comprising a test cover, a formaldehyde monitoring frame, a driving device, an airtight assembly, an air purification assembly and a suction circulation assembly; the formaldehyde monitoring frame is used for placing and monitoring furniture samples, is arranged in the testing cover in a sliding mode and is driven by the driving device, and a sealed testing environment of the formaldehyde monitoring frame and the testing cover is constructed through the airtight assembly; the air purification assembly and the suction circulation assembly are respectively communicated with two sides of the test cover and used for constructing a standard gas test environment of the test cover. The invention can provide a standard gas test environment with good air tightness and high precision, can eliminate the interference of external factors to the maximum extent so as to obtain high-precision data, and has the advantages of reduced workload, improved efficiency and strong data intuition compared with the traditional method for detecting and obtaining data by collecting air samples.)

1. The utility model provides a high accuracy furniture formaldehyde detection device which characterized in that: comprises a test cover (1), a formaldehyde monitoring frame (2), a driving device (6), an airtight component, an air purification component (3) and a suction circulation component (4);

the formaldehyde monitoring frame (2) is used for placing and monitoring furniture samples, the formaldehyde monitoring frame (2) is slidably arranged in the testing cover (1) and is driven by the driving device (6), and a sealed testing environment of the formaldehyde monitoring frame (2) and the testing cover (1) is established through the airtight assembly;

the air purification assembly (3) and the suction circulation assembly (4) are respectively communicated with two sides of the test cover (1) and used for constructing a standard gas test environment of the test cover (1).

2. The high-precision furniture formaldehyde detection device according to claim 1, characterized in that: the formaldehyde monitoring frame (2) comprises a base (21), two side frames (22) symmetrically arranged on the base (21) and a sealing plate (23) arranged at the top ends of the two side frames (22), wherein square notches are reserved at four corners of the base (21).

3. The high-precision furniture formaldehyde detection device according to claim 2, characterized in that: the formaldehyde monitoring frame (2) is characterized by further comprising junction boxes (24) arranged on the two side frames (22) and a main control box (26) arranged at the bottom of the base (21), wherein at least two formaldehyde sensors (25) are arranged on the junction boxes (24), a main control module and a wireless transmission module are arranged in the main control box (26), the signal output ends of the formaldehyde sensors (25) are connected with an I/O (input/output) universal port of the main control module, the signal input end of the wireless transmission module is connected with the signal output end of the main control module, and the signal output end of the wireless transmission module is wirelessly connected with a monitoring center.

4. The high-precision furniture formaldehyde detection device according to claim 2, characterized in that: the airtight assembly comprises a sealing air bag (9) embedded on the periphery of the base (21) and a discharge pipeline (5) arranged at the top end of the test cover (1) and connected with the sealing air bag (9), an air storage bag (7) and an electromagnetic valve (8) are arranged on the discharge pipeline (5), and a plug block abutted against the discharge pipeline (5) is arranged on the sealing plate (23).

5. The high-precision furniture formaldehyde detection device according to claim 2, characterized in that: the testing cover is characterized in that a square frame (10) is arranged outside the testing cover (1), support plates (11) are arranged at four corners of the bottom of the square frame (10) respectively, a screw rod (12) and a guide rod (13) are sleeved on the two groups of support plates (11) in the diagonal direction respectively, guide grooves (14) are formed in four corners of a sealing plate (23) respectively, and a screw nut (15) in threaded fit with the screw rod (12) is arranged in one group of guide grooves (14) in the diagonal direction. The other group of guide grooves (14) in the diagonal direction is in sliding fit with the guide rod (13), and the top ends of the two screw rods (12) are respectively connected with the driving end and the driven end of the driving device (6).

6. The high-precision furniture formaldehyde detection device according to claim 1, characterized in that: air purification subassembly (3) are including purifying wind pipeline (31), air purifier (32), centrifugal fan (33), purification stop valve (34) and flowmeter (35), the one end and the test of purifying wind pipeline (31) cover (1) are linked together, and the other end is linked together with the air outlet of air purifier (32), centrifugal fan (33) are connected with the air intake of air purifier (32), it locates on purifying wind pipeline (31) to purify stop valve (34) and flowmeter (35).

7. The high-precision furniture formaldehyde detection device according to claim 1, characterized in that: the suction circulation component (4) comprises a suction pipeline (41), a vacuum pump (42), a vacuum stop valve (43) and a pressure gauge (44), one end of the suction pipeline (41) is communicated with one side of the test cover (1) relative to the air purification component (3), the other end of the suction pipeline is connected with the vacuum pump (42), and the vacuum stop valve (43) and the pressure gauge (44) are arranged on the suction pipeline (41).

8. The high-precision furniture formaldehyde detection device according to claim 2, characterized in that: elastic ropes (16) used for fixing furniture samples are respectively arranged on the two side frames (22), and connecting buckles (17) which are buckled with each other are arranged between the two elastic ropes (16).

9. A method for testing furniture formaldehyde by using the detection device of any one of claims 1 to 8, which is characterized by mainly comprising the following steps,

s1, placing the furniture sample into the detection device, sealing the furniture sample by using the airtight component, vacuumizing the gas in the detection device by using the suction circulation component (4), observing the air tightness of the furniture sample, performing clean gas replacement on the two detection devices by using the air purification component (3), extracting the gas by using the suction circulation component (4), and repeating the operation for 3 times;

s2, preparing a detection device for blank control and processing the detection device in the same way;

s3, placing the two detection devices in the same constant-temperature constant-humidity clean cabin, heating for 2h +/-10 min at the temperature of 65 ℃, then obtaining a plurality of formaldehyde content values in the two detection devices in real time by a plurality of formaldehyde sensors (25) on the two detection devices, and calculating an average value, wherein the difference value of the two average values is the formaldehyde content test value of the furniture sample.

Technical Field

The invention belongs to the technical field of furniture formaldehyde testing, and particularly relates to a high-precision furniture formaldehyde detection device and method.

Background

At present, while the furniture and home decoration industry is developing vigorously, the problem of indoor air pollution caused by the furniture and home decoration industry comes along with the furniture and home decoration industry, in recent years, more and more people begin to realize the influence of the indoor environment on health, have a safe and healthy home environment, and become a hot spot concerned by the public;

the formaldehyde content in the furniture is always concerned by consumers, and the formaldehyde belongs to suspicious carcinogenic and teratogenic substances and has various influences on human health, such as irritation, allergy, abnormal smell, abnormal lung function, abnormal liver function, abnormal immune function and the like;

the detection of the release amount of harmful substances in furniture and decorative materials by adopting an environment test chamber method is considered to be the most scientific and effective detection means at present, the environment test chamber simulates an indoor real environment for detection, and the working principle is as follows: after the test chamber is dried and purified, the furniture is placed in the test chamber under certain test conditions, and after a certain time, an air sample in the test chamber is collected to test the release amount of harmful substances such as formaldehyde, VOC and the like, but the mode has certain defects, and firstly, a high-precision standard gas test environment is difficult to provide; secondly, in order to obtain high-precision data, air samples need to be collected for multiple times to detect and obtain the data, the workload is large, the efficiency is low, and the data intuition is poor.

Therefore, a high-precision furniture formaldehyde detection device and method are provided.

Disclosure of Invention

The invention aims to solve the problems and provide a high-precision furniture formaldehyde detection device and method which are simple in structure and reasonable in design.

The invention realizes the purpose through the following technical scheme:

a temperature-equalizing distributed parallel micro-flow-channel heat exchanger comprises a test cover, a formaldehyde monitoring frame, a driving device, an airtight assembly, an air purification assembly and a suction circulation assembly;

the formaldehyde monitoring frame is used for placing and monitoring furniture samples, is arranged in the testing cover in a sliding mode and is driven by the driving device, and a sealed testing environment of the formaldehyde monitoring frame and the testing cover is constructed through the airtight assembly;

the air purification assembly and the suction circulation assembly are respectively communicated with two sides of the test cover and used for constructing a standard gas test environment of the test cover.

A method for testing the formaldehyde in the furniture by using the detection device mainly comprises the following steps,

s1, placing the furniture sample into the detection device, sealing the furniture sample by using the air-tight component, vacuumizing the air in the detection device by using the suction circulation component, observing the air tightness of the furniture sample, performing clean air replacement on the two detection devices by using the air purification component, sucking the air by using the suction circulation component, and repeating the operation for 3 times;

s2, preparing a detection device for blank control and processing the detection device in the same way;

s3, placing the two detection devices in the same constant-temperature constant-humidity clean cabin, heating for 2h +/-10 min at the temperature of 65 ℃, then obtaining a plurality of formaldehyde content values in the two detection devices in real time by a plurality of formaldehyde sensors on the two detection devices, and calculating an average value, wherein the difference value of the two average values is the formaldehyde content test value of the furniture sample.

The invention has the beneficial effects that:

1. according to the invention, the whole detection device can provide a high-precision standard gas test environment with good air tightness, and can eliminate the interference of external factors to the greatest extent so as to obtain high-precision data.

Drawings

FIG. 1 is a schematic view of the overall structure provided by the present invention;

FIG. 2 is a schematic view of the overall structure of the formaldehyde monitoring stand provided in FIG. 1;

FIG. 3 is a top view of the test shield provided in FIG. 2;

FIG. 4 is a perspective view of a formaldehyde monitoring stand according to the present invention;

FIG. 5 is a block diagram of a formaldehyde monitoring system provided by the present invention;

FIG. 6 is a schematic layout of a furniture formaldehyde testing device provided by the present invention;

in the figure: 1. a test housing; 2. a formaldehyde monitoring rack; 21. a base; 22. a side frame; 23. a sealing plate; 24. a junction box; 25. a formaldehyde sensor; 26. a master control box; 3. an air purification assembly; 31. a purified air delivery duct; 32. an air purifier; 33. a centrifugal fan; 34. a purification stop valve; 35. a flow meter; 4. a suction cycle assembly; 41. a suction duct; 42. a vacuum pump; 43. a vacuum stop valve; 44. a pressure gauge; 5. a discharge conduit; 6. a drive device; 7. an air bag is stored; 8. an electromagnetic valve; 9. sealing the air bag; 10. a square frame; 11. a support plate; 12. a screw rod; 13. a guide bar; 14. a guide groove; 15. a nut; 16. an elastic cord; 17. a connecting buckle.

Detailed Description

The present application will now be described in further detail with reference to the drawings, it should be noted that the following detailed description is given for illustrative purposes only and is not to be construed as limiting the scope of the present application, as those skilled in the art will be able to make numerous insubstantial modifications and adaptations to the present application based on the above disclosure.

Example 1

As shown in fig. 1, a high-precision furniture formaldehyde detection device comprises a test cover 1, a formaldehyde monitoring frame 2, a driving device 6, an airtight component, an air purification component 3 and a suction circulation component 4;

the formaldehyde monitoring frame 2 is used for placing and monitoring furniture samples, the formaldehyde monitoring frame 2 is arranged in the testing cover 1 in a sliding mode and driven by the driving device 6, and a sealed testing environment of the formaldehyde monitoring frame 2 and the testing cover 1 is established through the airtight assembly;

the air purification component 3 and the suction circulation component 4 are respectively communicated with two sides of the test cover 1 to construct a standard gas test environment of the test cover 1.

As shown in fig. 2 and 5, the formaldehyde monitoring rack 2 includes a base 21, two side frames 22 symmetrically disposed on the base 21, and a sealing plate 23 disposed on top ends of the two side frames 22, wherein square notches are formed at four corners of the base 21.

The formaldehyde monitoring frame 2 further comprises a junction box 24 arranged on the two side frames 22 and a main control box 26 arranged at the bottom of the base 21, at least two formaldehyde sensors 25 are arranged on the junction box 24, a main control module and a wireless transmission module are arranged in the main control box 26, the signal output ends of the plurality of formaldehyde sensors 25 are all connected with an I/O universal port of the main control module, the signal input end of the wireless transmission module is connected with the signal output end of the main control module, the signal output end of the wireless transmission module is in wireless connection with a monitoring center, wherein the formaldehyde sensors 25 with the model of SM21380B-CH20 are connected to the main control module through RS485 bus transmission, the main control module is a minimum system formed by a model STM32F103VB embedded MCU chip produced by Shenzhen Yinbite company and a peripheral oscillation circuit thereof, and the formaldehyde sensors 25 transmit collected electric signals to the main control module, the main control module converts the electric signals into data information and the data information is transmitted to the monitoring center through the wireless transmission module, the wireless transmission module adopts wireless communication based on a TCP/IP wireless communication protocol, and the data information is acquired through a wireless network more efficiently and conveniently.

The airtight assembly comprises a sealing air bag 9 embedded on the periphery of a base 21 and a discharge pipeline 5 arranged at the top end of the test cover 1 and connected with the sealing air bag 9, an air storage bag 7 and an electromagnetic valve 8 are arranged on the discharge pipeline 5, a plug block abutting against the discharge pipeline 5 is arranged on the sealing plate 23, the internal space of the test cover 1 is compressed in the process that the formaldehyde monitoring frame 2 is driven by the driving device 6 to extend into the test cover 1, air flow enters the air storage bag 7 through the discharge pipeline 5, when the formaldehyde monitoring frame 2 enters the test cover 1, the electromagnetic valve 8 is opened after the plug block on the sealing plate 23 abuts against the discharge inlet of the discharge pipeline 5, the air flow is conveyed to the sealing air bag 9 through the air storage bag 7, and the sealing air bag 9 is expanded from the four corners of the base 21 to complete the construction of a sealing cabin structure between the bottom of the base 21 and the test cover 1.

Air purification subassembly 3 is including purifying wind pipeline 31, air purifier 32, centrifugal fan 33, purifying stop valve 34 and flowmeter 35, purifying wind pipeline 31's one end and test cover 1 and being linked together, the other end is linked together with air purifier 32's air outlet, centrifugal fan 33 is connected with air purifier 32's air intake, purifying stop valve 34 and flowmeter 35 locate purifying wind pipeline 31 on, outside air gets into purifying wind pipeline 31 and reinjects into the sealed cabin after air purifier 32 purifies under centrifugal fan 33's effect, makes the air volume in the entering test bag through flowmeter 35, stops behind the air admission, closes purifying stop valve 34, air purifier 32 and centrifugal fan 33.

The suction circulation component 4 comprises a suction pipeline 41, a vacuum pump 42, a vacuum stop valve 43 and a pressure gauge 44, one end of the suction pipeline 41 is communicated with one side of the test cover 1 relative to the air purification component 3, the other end of the suction pipeline is connected with the vacuum pump 42, the vacuum stop valve 43 and the pressure gauge 44 are arranged on the suction pipeline 41, the vacuum pump 42 is started to vacuumize the sealed cabin, the vacuum degree in the sealed cabin is displayed through the pressure gauge 44, and the vacuum pump 42 and the vacuum stop valve 43 are closed after the corresponding vacuum degree is reached.

As shown in fig. 3-4, a square frame 10 is disposed outside the test cover 1, four corners of the bottom of the square frame 10 are respectively provided with a support plate 11, two groups of two support plates 11 in opposite angles are respectively sleeved with a screw rod 12 and a guide rod 13, four corners of the sealing plate 23 are respectively provided with a guide groove 14, the other group of guide grooves 14 in opposite angles is in sliding fit with the guide rod 13, top ends of the two screw rods 12 are respectively connected with a driving end and a driven end of the driving device 6, after the driving device 6 drives the two screw rods 12 to rotate, since a screw nut 15 in the group of guide grooves 14 in opposite angles is disposed in threaded fit with the screw rod 12, the screw nut 15 is engaged with the screw rod 12 to drive the sealing plate 23 to rise, and further, the whole formaldehyde monitoring frame 2 is in sliding fit with the test cover 1.

The two side frames 22 are respectively provided with elastic ropes 16 for fixing furniture samples, connecting buckles 17 which are buckled with each other are arranged between the two elastic ropes 16, the furniture samples are placed on the base 21 and are fixed by the connecting buckles 17 after the elastic ropes 16 on the two side frames 22 are crossed with each other, so that the furniture samples are stably fixed on the base 21, and the fixing mode is flexibly adjusted according to the appearance of the actual furniture samples, and aims to stably fix the furniture samples on the base 21;

the specific steps of using the whole detection device are as follows,

firstly, after a furniture sample is fixed on a base 21 by using an elastic rope 16, a driving device 6 drives screw rods 12 on two support plates 11 in a square frame 10 to rotate simultaneously, a nut 15 and the screw rods 12 generate meshing transmission to drive a sealing plate 23 to ascend, and then the sealing plate 23 and the whole formaldehyde monitoring frame 2 ascend to enter a test cover 1;

meanwhile, in the process that the driving device 6 drives the formaldehyde monitoring frame 2 to extend into the test cover 1, the internal space of the test cover 1 is compressed, air flow enters the air storage bag 7 through the discharge pipeline 5, when the formaldehyde monitoring frame 2 enters the test cover 1, the plug block on the sealing plate 23 is abutted to the discharge inlet of the discharge pipeline 5, the electromagnetic valve 8 is opened, the air flow is conveyed to the sealing air bag 9 through the air storage bag 7, and the sealing air bag 9 is expanded from the four corners of the base 21 so that the construction of a sealed cabin structure is completed between the bottom of the base 21 and the test cover 1;

then, the vacuum pump 42 is started to vacuumize the sealed cabin, the pressure gauge 44 displays the vacuum degree in the sealed cabin, after the corresponding vacuum degree is reached, the vacuum pump 42 and the vacuum stop valve 43 are closed to observe the structure air tightness, moreover, the air purification assembly 3 enables external air to enter the purified air conveying pipeline 31 and then to be injected into the sealed cabin after being purified by the air purifier 32 under the action of the centrifugal fan 33, the air volume entering the test bag is controlled by the flowmeter 35, after air intake is stopped, the purification stop valve 34, the air purifier 32 and the centrifugal fan 33 are closed to finish the replacement of clean air, then the air is pumped out by the suction circulation assembly 4, and the operation is repeated for 3 times to finish the construction of a standard gas test environment in the sealed cabin;

finally, under a standard gas test environment of a sealed cabin, the whole device is placed in the same constant-temperature constant-humidity clean cabin, heating is carried out for 2h +/-10 min at the temperature of 65 ℃, the furniture sample releases formaldehyde, a plurality of formaldehyde sensors 25 on the detection device transmit collected electric signals to a main control module, the main control module converts the electric signals into data information, the data information is transmitted to a monitoring center through a wireless transmission module, a plurality of formaldehyde content values are obtained in real time, and the monitoring center calculates to obtain an average value;

whole detection device can provide the gas test environment of the good and high accuracy standard of gas tightness, can get rid of the interference of external factor to the at utmost to obtain the data of high accuracy, compare in the traditional mode of gathering the air sample and detecting and obtaining the data, work load reduces, and efficiency improves, and data intuition is strong.

As shown in fig. 6, a method for testing furniture formaldehyde by using the detection device mainly comprises the following steps,

s1, placing the furniture sample into the detection device, sealing the furniture sample by using the airtight component, vacuumizing the gas in the detection device by using the suction circulation component 4, observing the air tightness of the furniture sample, performing clean gas replacement on the two detection devices by using the air purification component 3, extracting the gas by using the suction circulation component 4, and repeating the operation for 3 times;

s2, preparing a detection device for blank control and processing the detection device in the same way;

s3, placing the two detection devices in the same constant-temperature constant-humidity clean cabin, heating for 2h +/-10 min at the temperature of 65 ℃, then obtaining a plurality of formaldehyde content values in the two detection devices in real time by a plurality of formaldehyde sensors 25 on the two detection devices, and calculating an average value, wherein the difference value of the two average values is the formaldehyde content test value of the furniture sample.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.