CN210863315U - VOC sensor's reacting chamber and VOC sensor - Google Patents
VOC sensor's reacting chamber and VOC sensor Download PDFInfo
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- CN210863315U CN210863315U CN201921394833.5U CN201921394833U CN210863315U CN 210863315 U CN210863315 U CN 210863315U CN 201921394833 U CN201921394833 U CN 201921394833U CN 210863315 U CN210863315 U CN 210863315U
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Abstract
The utility model discloses a VOC sensor's reacting chamber and VOC sensor, the reacting chamber includes air inlet subassembly, reacting chamber subassembly and filter screen subassembly, and reacting chamber subassembly includes the subassembly body, and the subassembly body is equipped with inner chamber, first opening and second opening, air inlet subassembly, reacting chamber subassembly and filter screen subassembly sealing connection, air inlet subassembly is equipped with the inlet port, the inlet port passes through filter screen subassembly and first opening and communicates with the inner chamber of subassembly body; the component body is provided with an air outlet, and the component body is also provided with a first mounting structure for mounting a VOC sensor component, and the first mounting structure enables the mounted VOC sensor component to seal the second opening. The utility model discloses set up the filter screen subassembly, dust particle in the filterable air to avoid dust particle to cover on VOC sensing element, increased the life-span of VOC sensor. The utility model discloses can wide application in the sensor field.
Description
Technical Field
The utility model belongs to the technical field of the sensor and specifically relates to a VOC sensor's reacting chamber and VOC sensor
Background
VOC (volatile organic compounds) exhaust gas is generally generated in various industrial fields such as plastics, rubber processing, paint production, automobile spray painting and coating production, and the production and processing of products generate a large amount of exhaust gas containing volatile organic compounds. The waste gas is discharged into the atmosphere without treatment, and photochemical pollution can be formed under certain conditions, so that the quality of the atmosphere is influenced, and the growth of animals and plants and the health of human beings are influenced.
VOC sensors are sensors for detecting components including volatile organic compounds in the air, and generally, in a detection apparatus, VOC sensing elements are directly exposed or are simply installed in a protective housing. In practice, the air carries dust particles, such as PM2.5 and PM10, in addition to gases. The VOC sensing element is easily covered by dust particles during use, resulting in poor sensitivity, and many VOC sensors cannot be used without reaching the design life.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims to provide a: a reaction chamber of a VOC sensor and the VOC sensor are provided to prolong the service life of the VOC sensor.
The utility model discloses the first technical scheme who takes is:
a reaction chamber of a VOC sensor comprises an air inlet component, a reaction chamber component and a filter screen component, wherein the reaction chamber component comprises a component body, the component body is provided with an inner cavity, a first opening and a second opening, the air inlet component, the reaction chamber component and the filter screen component are hermetically connected, the air inlet component is provided with an air inlet hole, and the air inlet hole is communicated with the inner cavity of the component body through the filter screen component and the first opening; the component body is provided with an air outlet, and the component body is also provided with a first mounting structure for mounting a VOC sensor component, and the first mounting structure enables the mounted VOC sensor component to seal the second opening.
Further, the air inlet assembly includes a pagoda-shaped air inlet and a second mounting structure; the pagoda-shaped air inlet is fixedly connected with the second mounting structure, the filter screen component comprises a plurality of filter screens and a third mounting structure, and a fourth mounting structure is arranged on one surface of the component body where the first opening is located; the second mounting structure, the third mounting structure and the fourth mounting structure are mounted in a matched mode; the number of screens are sandwiched between the third mounting structure and the second mounting structure and/or between the third mounting structure and the fourth mounting structure when installed.
Further, second mounting structure, third mounting structure and fourth mounting structure all are equipped with 3 or 4 symmetric distribution's screw hole.
Further, the second mounting structure, the third mounting structure and the fourth mounting structure are mounted through screws and nuts.
Further, airtight structures are arranged between the second mounting structure and the third mounting structure and between the third mounting structure and the fourth mounting structure.
Further, the filter screen is a polytetrafluoroethylene filter screen, and the aperture of the filter screen is smaller than 10 microns.
Furthermore, the number of the filter screens is multiple, and at least more than two filter screens with pore diameters or more than two filter screens made of materials exist in the multiple filter screens.
Further, the air outlet is a pagoda-shaped air outlet.
Further, the assembly body is of a circular tubular structure.
The utility model discloses the second technical scheme who takes is:
a VOC sensor comprises a reaction chamber of the VOC sensor and a VOC sensor component, wherein the VOC sensor component comprises a circuit board and a VOC sensing element arranged on the circuit board, the circuit board is installed in a matching way with a first installation structure, the circuit board seals a second opening, and the VOC sensing element is arranged in an inner cavity of the reaction chamber component.
The utility model has the advantages that: the utility model discloses a VOC sensor module has set up the reacting chamber, be provided with the filter screen subassembly between the air inlet of this reacting chamber to the inner chamber of reacting chamber subassembly, this reacting chamber subassembly is equipped with second opening and first mounting structure, VOC sensor module is installed when reacting chamber subassembly, it is sealed with the second opening, make the gas that detects get into from the air inlet, it is detected by VOC sensor module in the reacting chamber subassembly again after filtering by the filter screen subassembly, discharge from the gas outlet at last, dust particle in this filter screen subassembly can the filtered air, in order to avoid dust particle to cover on VOC sensing element, the life-span of VOC sensor has been increased.
Drawings
Fig. 1 is a front view of a reaction chamber of a VOC sensor according to an embodiment of the present invention;
fig. 2 is a right side view of an air inlet assembly of a reaction chamber of a VOC sensor in accordance with an embodiment of the present invention;
fig. 3 is a right side view of a mounting structure of a screen assembly of a reaction chamber of a VOC sensor according to an embodiment of the present invention;
fig. 4 is a right side view of a reaction chamber assembly of a reaction chamber of a VOC sensor in accordance with an embodiment of the present invention;
fig. 5 is a left side view of a reaction chamber assembly of a reaction chamber of a VOC sensor in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a VOC sensor according to an embodiment of the present invention;
fig. 7 is a sectional structure view of a VOC sensor according to an embodiment of the present invention.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments.
The embodiment discloses a reaction chamber of a VOC sensor, which comprises an air inlet component, a reaction chamber component and a filter screen component, wherein the reaction chamber component comprises a component body, the component body is provided with an inner cavity, a first opening and a second opening, the air inlet component, the reaction chamber component and the filter screen component are hermetically connected, the air inlet component is provided with an air inlet, and the air inlet is communicated with the inner cavity of the component body through the filter screen component and the first opening; the component body is provided with an air outlet, and the component body is also provided with a first mounting structure for mounting a VOC sensor component, and the first mounting structure enables the mounted VOC sensor component to seal the second opening.
Specifically, referring to fig. 1 and 2, in the present embodiment, the air inlet assembly is composed of an air inlet 302 and a mounting structure 301, the air inlet 302 is provided with an air inlet hole 303, the air inlet 302 is mounted on the mounting structure 301, wherein the air inlet 302 is in a pagoda shape, and the hose of the air pump can be easily sleeved on the air inlet 302 by using the pagoda-shaped air inlet, and meanwhile, the hose sleeved in the air inlet 302 generates a larger friction force when being pulled out, so that the hose is not easily dropped off, and the air tightness between the hose and the air inlet 302 is better due to the pagoda-shaped appearance. Of course, as an alternative embodiment, a cylindrical or a mesa-shaped inlet may be used as the inlet. In addition, the mounting structure 301 is further provided with a plurality of screw holes 400c for mounting the structure. Of course, the mounting between the components can be realized by adopting a snap fit or glue and the like instead of screw holes. The screw mounting has the advantage of facilitating replacement of the screen assembly. The mounting structure 301 is a circular plate, but it can be implemented by a polygonal plate such as a square plate.
Referring to fig. 1 and 3, the screen assembly includes a mounting structure 201 and a number of screens 202, in this embodiment the number of screens 202 is 2. In other embodiments, there may be three or one filter screen 202 sandwiched between different components, and in fact, the filter screen 202 can be used to filter dust particles as long as it is disposed on the air path of the gas entering the inner cavity of the component body 100 of the chamber component. As shown in fig. 3, the mounting structure 201 is a circular disc, and the connecting surface of the mounting structure 201 and the mounting structure 301 in fig. 2 are generally the same shape or have a shape matching each other. In this embodiment, the mounting structure 201 is further provided with the same number of screw holes 400d as the mounting structure 301 in fig. 2, and the screw holes 400d correspond to the screw holes 400c in the mounting structure 301 in fig. 2 one to one. Of course, in other embodiments, the screw holes may be omitted if a non-screw mounting is used. The mounting structure 201 is further provided with a through hole 203 in the middle for gas circulation.
Referring to fig. 1, 4 and 5, in the present embodiment, the reaction chamber assembly includes an assembly body 100, and the assembly body 100 is tubular, specifically, circular tubular, and is provided with an inner cavity. Of course, the assembly body 100 may also be implemented by other structures having an inner cavity, and the assembly body 100 in this embodiment is in a circular tube shape for the purpose of easy processing and installation. Further, the pack body 100 is provided with an air outlet 101, a mounting structure 102, and a mounting structure 103. The assembly body 100 is provided with a first opening 104 and a second opening 105, wherein the first opening 104 is located at one side of the mounting structure 103, and the second opening 105 is located at one side of the mounting structure 102. The mounting structure 102 is provided with a screw hole 400a, and the screw hole 400a is used for mounting a sensor assembly. Screw holes 400b are provided on the mounting structure 103. As shown in fig. 1, the mounting structure 103, the mounting structure 201, and the mounting structure 301 are sequentially fitted and mounted through screw holes. In fig. 1, the gas enters from the gas inlet 302, passes through the plurality of screens 202 and the mounting structure 201, enters the inner cavity of the assembly body 100 through the first opening 104 as shown in fig. 4, and the second opening 105 as shown in fig. 5 is sealed by the sensor assembly in the case of mounting the sensor assembly, so that the gas passes through the sensor element disposed in the wall and then is discharged through the gas outlet 101.
Screw holes 400a on the mounting structure 102 are used to mount the circuit board of the sensor assembly. In order to ensure the sealing performance and reduce the process difficulty, the surfaces of the mounting structures 102, 103, 201 and 301 that need to be installed in cooperation with other components may be made planar.
Referring to fig. 6 and 7, this example illustrates the reaction chamber after the VOC sensor assembly is added. The VOC sensor assembly includes a VOC sensing element 501 and a circuit board 500. In the present embodiment, the components are combined by a screw 401 and a nut 402. The circuit board 500 is provided with screw holes corresponding to the screw holes of the mounting structure 102. As shown by the dashed arrows in fig. 7, the gas enters from the gas inlet 302, contacts the VOC sensing element 501 in the inner cavity of the assembly body 100 of the reaction chamber assembly, and then is discharged from the gas outlet 101 after being bounced several times. The surfaces of the circuit board 500 connected to the mounting structure 102 are both flat surfaces, so that the circuit board has better air tightness. The circuit board 500 is further provided with a processing circuit for processing the detection voltage outputted from the VOC sensor device 501. For example, a filter circuit, an a/D conversion circuit, and/or a signal transmission circuit, etc. Of course, the circuit board 500 may also directly lead out the interface of the VOC sensor element 501, so as to facilitate the VOC sensor to be mounted on other circuits.
Preferred embodiments of the reaction chamber are described below, which can be combined with one another without contradiction.
In a preferred embodiment, the air scoop assembly includes a pagoda-shaped air scoop and a second mounting structure; the pagoda-shaped air inlet is fixedly connected with the second mounting structure, the filter screen assembly comprises a plurality of filter screens and a third mounting structure, and a fourth mounting structure is arranged on one surface of the reaction chamber assembly where the first opening is located; the second mounting structure, the third mounting structure and the fourth mounting structure are mounted in a matched mode; the number of screens are sandwiched between the third mounting structure and the second mounting structure and/or between the third mounting structure and the fourth mounting structure when installed.
In this embodiment, the air inlet adopts pagoda form, and its hose of being convenient for connect the air pump for the hose is convenient to insert and difficult pine takes off, produces better gas tightness simultaneously. The air pump can pump the gas to be detected into the air inlet through a hose.
As a preferred embodiment, the second, third and fourth mounting structures are each provided with 3 or 4 symmetrically distributed screw holes.
In the embodiment, 3 or 4 symmetrically distributed screw holes are adopted, so that the components can be installed relatively closely. Wherein the symmetrical distribution includes a central rotational symmetry to a point or a central symmetry to an axis.
As a preferred embodiment, the second, third and fourth mounting structures are mounted by screws and nuts.
Adopt screw and nut installation, for other mounting means, like glue, buckle or self-tapping screw etc. can dismantle repeatedly and install, be convenient for change the filter screen subassembly.
In a preferred embodiment, an airtight structure is arranged between the second mounting structure and the third mounting structure and between the third mounting structure and the fourth mounting structure.
Since the above structure is used to sandwich the screen, the gap may be relatively large. Increased gas tightness is required when gas tightness is required, for example when a sensor element capable of measuring the VOC content is installed in the reaction chamber. Therefore, an airtight structure is arranged between the components, such as adding a rubber pad, a coating and the like, so that the precision degree of the device can be improved.
In a preferred embodiment, the filter screen is a polytetrafluoroethylene filter screen, and the pore size of the filter screen is less than 10 microns.
The embodiment adopts the polytetrafluoroethylene filter screen, so that the cleaning is convenient, the maintainability of the device is improved, and the replacement cost of the components is reduced. Meanwhile, most dust particles can be effectively filtered by adopting the pore diameter of less than 10 microns.
In a preferred embodiment, the number of the filter screens is plural, and at least two or more filter screens with different pore diameters or different materials are provided in the plural filter screens.
In practical application, the filter screen can be provided in plurality, and the mounting structure for clamping the filter screen can also be provided in plurality. For example, by providing two mounting structures in the screen assembly, the number of screens can be increased to 3. Then, at this moment, a plurality of filter screens just can adopt different materials or different apertures to make up to reach more dust particle filter effect.
In a preferred embodiment, the air outlet is a pagoda-shaped air outlet.
This embodiment sets up the gas outlet for the coupling hose comes exhaust gas for the gas outlet is pagoda-shaped, can be convenient for the hose insert, and the hose is difficult to loosen simultaneously.
Referring to fig. 6 and 7, a VOC sensor includes a reaction chamber of the VOC sensor shown in fig. 1-5, and a VOC sensor assembly including a circuit board 500 and a VOC sensing element 501 mounted on the circuit board 500, the circuit board 500 being mounted in cooperation with the mounting structure 102, the circuit board 500 sealing the second opening 105 shown in fig. 5, the VOC sensing element 501 being disposed in an inner cavity of the reaction chamber assembly.
While the preferred embodiments of the present invention have been described, the present invention is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and such equivalent modifications or substitutions are intended to be included within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A reaction chamber of a VOC sensor, comprising: the reaction chamber assembly comprises an assembly body, the assembly body is provided with an inner cavity, a first opening and a second opening, the air inlet assembly, the reaction chamber assembly and the filter screen assembly are connected in a sealing mode, the air inlet assembly is provided with an air inlet hole, and the air inlet hole is communicated with the inner cavity of the assembly body through the filter screen assembly and the first opening; the component body is provided with an air outlet, and the component body is also provided with a first mounting structure for mounting a VOC sensor component, and the first mounting structure enables the mounted VOC sensor component to seal the second opening.
2. A VOC sensor reaction chamber according to claim 1, wherein: the air inlet component comprises a pagoda-shaped air inlet and a second mounting structure; the pagoda-shaped air inlet is fixedly connected with the second mounting structure, the filter screen component comprises a plurality of filter screens and a third mounting structure, and a fourth mounting structure is arranged on one surface of the component body where the first opening is located; the second mounting structure, the third mounting structure and the fourth mounting structure are mounted in a matched mode; the number of screens are sandwiched between the third mounting structure and the second mounting structure and/or between the third mounting structure and the fourth mounting structure when installed.
3. A VOC sensor reaction chamber according to claim 2, wherein: and the second mounting structure, the third mounting structure and the fourth mounting structure are all provided with 3 or 4 symmetrically distributed screw holes.
4. A VOC sensor reaction chamber according to claim 2 or 3, wherein: the second mounting structure, the third mounting structure and the fourth mounting structure are mounted through screws and nuts.
5. A VOC sensor reaction chamber according to claim 2, wherein: and airtight structures are arranged between the second mounting structure and the third mounting structure and between the third mounting structure and the fourth mounting structure.
6. A VOC sensor reaction chamber according to claim 2, wherein: the filter screen is polytetrafluoroethylene filter screen, the aperture of filter screen is less than 10 microns.
7. A VOC sensor reaction chamber according to claim 2, wherein: the number of the filter screens is multiple, and at least more than two kinds of filter screens with apertures or more than two kinds of filter screens made of materials exist in the multiple filter screens.
8. A VOC sensor reaction chamber in accordance with claim 1, 3, 5, 6 or 7 wherein: the air outlet is a pagoda-shaped air outlet.
9. A VOC sensor reaction chamber in accordance with claim 1, 3, 5, 6 or 7 wherein: the assembly body is of a circular tubular structure.
10. A VOC sensor, comprising: a reaction chamber comprising a VOC sensor according to any of claims 1-9, and a VOC sensor assembly comprising a circuit board and a VOC sensing component mounted on the circuit board, the circuit board being mounted in mating relation with the first mounting structure, the circuit board sealing the second opening, the VOC sensing component being disposed in an interior cavity of the reaction chamber assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921394833.5U CN210863315U (en) | 2019-08-23 | 2019-08-23 | VOC sensor's reacting chamber and VOC sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921394833.5U CN210863315U (en) | 2019-08-23 | 2019-08-23 | VOC sensor's reacting chamber and VOC sensor |
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| CN210863315U true CN210863315U (en) | 2020-06-26 |
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| CN201921394833.5U Active CN210863315U (en) | 2019-08-23 | 2019-08-23 | VOC sensor's reacting chamber and VOC sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487616A (en) * | 2019-08-23 | 2019-11-22 | 中国科学院广州地球化学研究所 | A kind of reaction chamber and VOC sensor of VOC sensor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110487616A (en) * | 2019-08-23 | 2019-11-22 | 中国科学院广州地球化学研究所 | A kind of reaction chamber and VOC sensor of VOC sensor |
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