Sensor air chamber structure
By designing a sensor gas chamber structure with a diffusion gas path and a hydrophobic filter membrane in the gas detector, the problem of condensate affecting detection accuracy and service life is solved, and a compact structure, easy maintenance and high accuracy detection effect is achieved.
Patent Information
- Application Number
- CN202421603407.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-07-08
AI Technical Summary
In existing gas detectors, gas sensors are susceptible to condensation water, resulting in reduced detection accuracy and shortened service life. At the same time, the sensor gas chamber structure is too large and maintenance is inconvenient.
A sensor gas chamber structure including a gas chamber housing and a gas detection unit is designed, and the main gas path and the diffusion gas path are provided. The gas detection chamber has a hydrophobic filter membrane built into the gas detection chamber through the diffusion gas path to prevent direct contact with the sensor.
It effectively avoids impurities and liquid water in the detected gas entering the gas detection chamber, protects the gas sensor, improves detection accuracy, simplifies the replacement and maintenance of the sensor, and extends the service life.
Smart Images
Figure CN222866647U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gas detection and analysis, in particular to a sensor gas chamber structure. Background Art
[0002] In a gas detector or a flue gas analyzer, a gas sensor is usually installed as a gas detection unit. When the detected gas passes through the gas detection unit, it needs to contact the gas sensor in the air chamber to detect the concentration of the detected gas. The detected gas is usually heated during sampling, but the gas detection unit is not heated, which causes the temperature of the detected gas in the gas detection unit to decrease. At this time, condensed water will appear in the air chamber. However, when the condensed water directly contacts the gas sensor, it will affect the accuracy of the gas sensor and the service life of the gas sensor. Moreover, the existing gas sensor air chamber structure is generally too large, which makes it inconvenient to replace and maintain the sensor. In addition, during the detection process, the detected gas passes directly through the gas sensor, causing impurities in the detected gas to adhere to the gas sensor, seriously affecting the service life of the gas sensor. Utility Model Content
[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a sensor air chamber structure with good detection accuracy, long service life, compact structure and easy replacement.
[0004] The technical solution adopted by the utility model is: the utility model includes an air chamber shell and a gas detection unit, the air chamber shell is provided with a main air path and a diffusion air path, the gas detection unit has a gas detection cavity, one end of the diffusion air path is connected to the main air path, the other end of the diffusion air path is connected to the gas detection cavity, and the gas detection cavity is provided with a hydrophobic filter membrane.
[0005] Furthermore, one end of the diffusion gas path is communicated with a side end of the main gas path, and the other end of the diffusion gas path is communicated with the bottom of the gas detection cavity.
[0006] Furthermore, the number of the diffusion gas path and the number of the gas detection units are both multiple.
[0007] Furthermore, the gas detection unit comprises a gas detection seat, the gas detection cavity is formed inside the gas detection seat, and a gas sensor and a circuit board are sequentially arranged on the gas detection seat from bottom to top.
[0008] Furthermore, a sensor cover is sleeved on the outside of the gas sensor, and the circuit board is arranged on the upper end of the sensor cover.
[0009] Furthermore, the air chamber shell is connected to a first air chamber nozzle and a second air chamber nozzle, the first air chamber nozzle and the second air chamber nozzle are respectively located on two sides of the air chamber shell, and are respectively connected to two ends of the main air path.
[0010] Furthermore, the hydrophobic filter membrane is a PTFE hydrophobic filter membrane.
[0011] The beneficial effects of the utility model are:
[0012] With respect to the deficiencies of the prior art, in the present utility model, when the detected gas flows in, it does not directly pass through the gas detection chamber, but enters the gas detection chamber through the diffusion gas path, thereby effectively preventing impurities and liquid water in the detected gas from entering the gas detection chamber, preventing impurities from damaging the sensor and affecting the service life, and can improve the detection accuracy; wherein, through the provision of a hydrophobic filter membrane, the hydrophobic filter membrane can block the penetration of liquid water without affecting the passage of the detected gas, thereby preventing condensed water in the gas path from contacting the gas sensor, avoiding condensed water from damaging the gas sensor and affecting the service life, and can improve the detection accuracy; in addition, the overall structural layout of the sensor air chamber structure of the present utility model is reasonable and compact, which can facilitate the replacement and maintenance of the gas sensor of the gas detection unit, so that the present utility model has the advantages of good detection accuracy, long service life, compact structure and easy replacement. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0014] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;
[0015] Figure 2 It is a three-dimensional structural schematic diagram of the air chamber shell of the utility model;
[0016] Figure 3 It is a schematic cross-sectional view of the air chamber shell of the utility model.
[0017] The reference numerals are as follows:
[0018] 1. Gas chamber shell; 2. Gas detection unit; 3. Main gas path; 5. Diffusion gas path; 6. Gas detection cavity; 7. Hydrophobic filter membrane; 8. Gas detection seat; 9. Gas sensor; 10. Circuit board; 11. Sensor cover; 12. First gas chamber nozzle; 13. Second gas chamber nozzle.
[0019] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0021] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0022] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0023] like Figures 1 to 3 As shown, in this embodiment, the utility model includes an air chamber shell 1 and a gas detection unit 2, wherein the air chamber shell 1 is provided with a main gas path 3 and a diffusion gas path 5, the gas detection unit 2 has a gas detection cavity 6, one end of the diffusion gas path 5 is connected to the main gas path 3, and the other end of the diffusion gas path 5 is connected to the gas detection cavity 6, and the gas detection cavity 6 has a hydrophobic filter membrane 7 built in.
[0024] During detection, the gas to be detected is passed into the gas chamber shell 1 and mainly flows in the main gas path 3. At the same time, the gas to be detected in the main gas path 3 can enter the gas detection chamber 6 through the diffusion gas path 5 for detection, so as to effectively prevent impurities in the detected gas from entering the gas detection chamber 6, and further prevent impurities from damaging the gas sensor 9 of the gas detection unit 2; in addition, since the gas detection chamber 6 is equipped with a hydrophobic filter membrane 7, the gas needs to pass through the hydrophobic filter membrane 7 before entering the gas detection unit 2 for detection, so that the hydrophobic filter membrane 7 can block the penetration of liquid water without affecting the passage of the detected gas, thereby preventing condensed water in the gas path from contacting the gas sensor 9 of the gas detection unit 2, and further preventing condensed water from damaging the gas sensor 9.
[0025] With respect to the deficiencies of the prior art, in the utility model, when the detected gas flows in, it does not directly pass through the gas detection chamber 6, but enters the gas detection chamber 6 through the diffusion gas path 5, thereby effectively preventing impurities and liquid water in the detected gas from entering the gas detection chamber 6, preventing impurities from damaging the sensor and affecting the service life, and can improve the detection accuracy; wherein, through the setting of the hydrophobic filter membrane 7, the hydrophobic filter membrane 7 can block the penetration of liquid water without affecting the passage of the detected gas, thereby preventing condensed water in the gas path from contacting the gas sensor 9, avoiding condensed water from damaging the gas sensor 9 and affecting the service life, and can improve the detection accuracy; in addition, the overall structural layout of the sensor air chamber structure of the utility model is reasonable and compact, which can facilitate the replacement and maintenance of the gas sensor 9 of the gas detection unit 2, so that the utility model has the advantages of good detection accuracy, long service life, compact structure and easy replacement.
[0026] It is worth mentioning that when the sensor air chamber structure is placed vertically, the main gas path 3 is placed vertically on the placement surface in the axial direction. At this time, liquid water can pass quickly by gravity and will not stay in the main gas path 3, which can further reduce the probability of condensed water contacting the gas sensor 9.
[0027] In some embodiments, one end of the diffusion gas path 5 is connected to the side end of the main gas path 3, and the other end of the diffusion gas path 5 is connected to the bottom of the gas detection chamber 6. Specifically, the gas to be measured introduced into the main gas path 3 passes through the side end of the main gas path 3, the bottom of the gas detection chamber 6 and the hydrophobic filter membrane 7 in sequence, and then enters the gas sensor 9 of the gas detection unit 2 for detection.
[0028] In some embodiments, the number of the diffusion gas path 5 and the number of the gas detection unit 2 are both plural. Specifically, the number of the diffusion gas path 5 and the number of the gas detection unit 2 are both three.
[0029] In some embodiments, the gas detection unit 2 includes a gas detection seat 8, the gas detection cavity 6 is formed inside the gas detection seat 8, and a gas sensor 9 and a circuit board 10 are sequentially arranged on the gas detection seat 8 from bottom to top; the outside of the gas sensor 9 is sleeved with a sensor cover 11, and the circuit board 10 is arranged on the upper end of the sensor cover 11. During installation, the circuit board 10 and the sensor cover 11 are screwed through in sequence and then fixedly connected to the gas chamber housing 1.
[0030] In some embodiments, the air chamber shell 1 is connected to a first air chamber nozzle 12 and a second air chamber nozzle 13 , and the first air chamber nozzle 12 and the second air chamber nozzle 13 are respectively located on both sides of the air chamber shell 1 and are respectively connected to both ends of the main air path 3 .
[0031] In some embodiments, the hydrophobic filter membrane 7 is a PTFE hydrophobic filter membrane. Of course, the hydrophobic filter membrane 7 can also be other membrane layers, as long as it can have the function of hydrophobic filtration, it can also be within the scope of the implementation of the utility model.
[0032] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A sensor air chamber structure, characterized in that: It comprises an air chamber housing (1) and a gas detection unit (2), wherein the air chamber housing (1) is provided with a main air path (3) and a diffusion air path (5), the gas detection unit (2) has a gas detection cavity (6), one end of the diffusion air path (5) is connected to the main air path (3), and the other end of the diffusion air path (5) is connected to the gas detection cavity (6), and the gas detection cavity (6) is provided with a hydrophobic filter membrane (7).
2. A sensor air chamber structure according to claim 1, characterized in that: One end of the diffusion gas path (5) is in communication with the side end of the main gas path (3), and the other end of the diffusion gas path (5) is in communication with the bottom of the gas detection chamber (6).
3. A sensor air chamber structure according to claim 2, characterized in that: The diffusion gas path (5) and the gas detection unit (2) are both multiple in number.
4. A sensor air chamber structure according to any one of claims 1 to 3, characterized in that: The gas detection unit (2) comprises a gas detection seat (8), the gas detection cavity (6) is formed inside the gas detection seat (8), and a gas sensor (9) and a circuit board (10) are arranged on the gas detection seat (8) in sequence from bottom to top.
5. A sensor air chamber structure according to claim 4, characterized in that: The outside of the gas sensor (9) is sleeved with a sensor cover (11), and the circuit board (10) is arranged on the upper end of the sensor cover (11).
6. A sensor air chamber structure according to claim 1, characterized in that: The air chamber shell (1) is connected to a first air chamber nozzle (12) and a second air chamber nozzle (13); the first air chamber nozzle (12) and the second air chamber nozzle (13) are respectively located on two sides of the air chamber shell (1) and are respectively connected to two ends of the main air path (3).
7. A sensor air chamber structure according to claim 1, characterized in that: The hydrophobic filter membrane (7) is a PTFE hydrophobic filter membrane.