Gas detection device
By designing the siphon effect in the gas detection device, the problem of slow entry of external gas into the housing part is solved, and a faster gas response time is achieved.
Patent Information
- Application Number
- CN202311862982.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2025-07-01
AI Technical Summary
In the existing gas detection sensors, the rate at which external gas enters the housing part is slower.
The gas detection device is designed so that the first air hole is at least partially facing the first communication hole in the thickness direction of the gas detection device, forming a siphon effect, and increasing the rate of gas entering the housing part.
The siphon effect accelerates the rate of external gas entering the detection chamber and shortens the response time.
Smart Images
Figure CN120232885A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of sensors, and particularly to a gas detection device. Background Art
[0002] A gas detection sensor is a converter that converts the concentration of a certain gas into a corresponding electrical signal.
[0003] In the related art, a gas detection sensor includes a housing and a housing part. The housing part is located inside the housing. The housing part has a light source and a detection probe. When in use, the rate at which external gas enters the housing part is slow. Summary of the Invention
[0004] The inventor found that the layout relationship between the holes on the housing part and the holes on the housing affects the rate at which external gas enters the housing part.
[0005] The purpose of this application is to provide a gas detection device, including a housing, a housing part, a light source, and a detection probe. The housing has an inner cavity. At least part of the housing part is located in the inner cavity. The housing part has a detection cavity. At least part of the light source and at least part of the detection probe are both located in the detection cavity. The housing part has a first air hole, and the first air hole communicates with the detection cavity. The housing has a first communication hole that penetrates the housing. The first communication hole is in gas communication with the first air hole. Along the thickness direction of the gas detection device, at least part of the first air hole is directly opposite to the first communication hole.
[0006] In this application, along the thickness direction of the gas detection device, at least part of the first air hole is directly opposite to the first communication hole, reducing the blockage of external gas entering the housing part, thereby increasing the rate at which external gas enters the housing part. Brief Description of the Drawings
[0007] Figure 1 is a three-dimensional schematic diagram of the gas detection device of this application.
[0008] Figure 2 is Figure 1 the explosion schematic diagram of
[0009] Figure 3 is Figure 2 the three-dimensional sectional view and top view of the housing part in
[0010] Figure 4 is Figure 1 the three-dimensional schematic diagram after hiding the waterproof and breathable film.
[0011] Figure 5 is Figure 2 the three-dimensional schematic diagram of the housing part, the first circuit board, the second circuit board, and the third circuit board in
[0012] Figure 6 is Figure 1 A schematic diagram of the first communication hole, the second communication hole, the third communication hole, the first air hole, and the second air hole on the projection plane in
[0013] Figure 7 is a three-dimensional schematic diagram of another embodiment of the gas detection device of the present application with the waterproof and breathable film hidden.
[0014] Figure 8 is Figure 7 A schematic diagram of the first communication hole, the second communication hole, the third communication hole, the first air hole, and the second air hole on the projection plane in
[0015] Figure 9 is Figure 2 A three-dimensional sectional schematic diagram of the blocking part and the abutting part in
[0016] Figure 10 is Figure 9 A sectional schematic diagram of the blocking part in
[0017] Figure 11 is Figure 2 A three-dimensional schematic diagram of the outer shell and the abutting part in
[0018] Figure 12 is Figure 11 A three-dimensional schematic diagram with the abutting part hidden in
[0019] Figure 13 is Figure 11 A sectional schematic diagram of
[0020] Figure 14 is Figure 13 An enlarged schematic diagram at circle A in
[0021] Figure 15 is Figure 11 A three-dimensional sectional schematic diagram of the outer shell in Detailed implementation manners
[0022] Next, with reference to the accompanying drawings, the exemplary embodiments of the present application will be described in detail. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.
[0023] As Figures 1 to 15 shown is a gas detection device conforming to the present application. Refer to Figure 1 , Figure 2 and Figure 3, which includes: a housing 1, a housing portion 2, a light source 21, and a detection probe 22. The housing 1 has an inner cavity 11, and at least a part of the housing portion 2 is located in the inner cavity 11. The housing portion 2 has a detection cavity 23, and at least a part of the light source 21 and at least a part of the detection probe 22 are both located in the detection cavity 23;
[0024] The housing portion 2 has a first air hole 24, and the first air hole 24 communicates with the detection cavity 23; the housing 1 has a first communication hole, and the first communication hole 12 penetrates through the housing 1. The first communication hole 12 is in gas communication with the first air hole 24. Along the thickness direction Z of the gas detection device, at least a part of the first air hole 24 faces the first communication hole 12.
[0025] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the housing portion 2 has a second air hole 25, and the second air hole 25 communicates with the detection cavity 23. The housing 1 has a second communication hole 13, and the second communication hole 13 penetrates through the housing 1. The second communication hole 13 is in gas communication with the second air hole 25. Along the thickness direction Z of the gas detection device, at least a part of the second air hole 25 faces the second communication hole 13.
[0026] In some embodiments, referring to Figure 1 , Figure 2 and Figure 3 , the distance between the first air hole 24 and the second air hole 25 is greater than the distance between the first air hole 24 and the light source 21, the distance between the first air hole 24 and the second air hole 25 is greater than the distance between the second air hole 25 and the detection probe 22. The first air hole 24 is closer to the light source 21 than the second air hole 25, and the second air hole 25 is closer to the detection probe 22 than the first air hole 24.
[0027] In some embodiments, referring to Figure 2 and Figure 3 , the housing portion 2 has a first air hole 24 and a second air hole 25. Both the first air hole 24 and the second air hole 25 communicate with the detection cavity 23. The distance between the first air hole 24 and the second air hole 25 is greater than the distance between the first air hole 24 and the light source 21, and the distance between the first air hole 24 and the second air hole 25 is greater than the distance between the second air hole 25 and the detection probe 22; the housing 1 has a first communication hole 12 and a second communication hole 13. Both the first communication hole 12 and the second communication hole 13 penetrate through the housing 1. The first communication hole 12 is in gas communication with the first air hole 24, and the second communication hole 13 is in gas communication with the second air hole 25. Along the thickness direction Z of the gas detection device, at least a part of the first air hole 24 faces the first communication hole 12, and at least a part of the second air hole 25 faces the second communication hole 13.
[0028] Specifically, referring to Figure 2 andFigure 3 , the housing part 2 has a first air hole 24 and a second air hole 25. Both the first air hole 24 and the second air hole 25 communicate with the detection cavity 23. The distance between the detection probe 22 and the first air hole 24 is greater than the distance between the light source 21 and the first air hole 24. The distance between the light source 21 and the second air hole 25 is greater than the distance between the detection probe 22 and the second air hole 25; the outer shell 1 has a first communication hole 12 and a second communication hole 13. Both the first communication hole 12 and the second communication hole 13 penetrate through the outer shell 1. The first communication hole 12 is in gas communication with the first air hole 24, and the second communication hole 13 is in gas communication with the second air hole 25. Along the thickness direction Z of the gas detection device, the first air hole 24 is directly opposite to the first communication hole 12, and the second air hole 25 is directly opposite to the second communication hole 13.
[0029] In some embodiments, referring to Figure 3 and Figure 4 , the gas detection device has an extending direction X1, and the detection cavity 23 extends along the extending direction X1; along the extending direction X1, both the first air hole 24 and the second air hole 25 are located between the light source 21 and the detection probe 22; the fluid temperature in the first air hole 24 is higher than the fluid temperature in the second air hole 25. Since the fluid temperature in the first air hole 24 is higher than the fluid temperature in the second air hole 25, the hot fluid in the first air hole 24 flows in the direction away from the detection cavity 23, and the cold fluid in the second air hole 25 flows in the direction into the detection cavity 23, forming a siphon effect and accelerating the rate of the fluid entering the detection cavity 23. The first air hole 24 is directly opposite to the first communication hole 12, and the second air hole 25 is directly opposite to the second communication hole 13, which can reduce the blockage when the fluid enters the detection cavity 23 and shorten the response time.
[0030] Specifically, the temperature of the light source 21 is higher than the temperature of the detection probe 22. Since the first air hole 24 is closer to the light source 21 than the second air hole 25, and the second air hole 25 is closer to the detection probe 22 than the first air hole 24, the fluid temperature in the first air hole 24 is higher than the fluid temperature in the second air hole 25, enabling the fluid to enter the detection cavity 23 faster.
[0031] Specifically, referring to Figure 3 , a middle part is defined. Along the extending direction X1, the distance between the middle part and the detection probe 22 is equal to the distance between the middle part and the light source 21. Along the extending direction X1, the distance between the first air hole 24 and the middle part is a first distance L1, the distance between the first air hole 24 and the light source 21 is a second distance L2, L1 > L2, the distance between the second air hole 25 and the middle part is a third distance L3, and the distance between the second air hole 25 and the detection probe 22 is a fourth distance L4, L3 > L4. Further, along the extending direction X1, the closer the first air hole 24 is to the light source 21 and the closer the second air hole 25 is to the detection probe 22, the greater the temperature difference and the faster the fluid enters the detection cavity 23.
[0032] In some embodiments, referring to Figure 3 , the first air hole 24 includes a first sub-air hole 241 and a second sub-air hole 242. Along the extension direction X1, the first sub-air hole 241 is closer to the light source 21 than the second sub-air hole 242; the second air hole 25 includes a third sub-air hole 251 and a fourth sub-air hole 252. Along the extension direction X1, the third sub-air hole 251 is closer to the detection probe 22 than the fourth sub-air hole 252.
[0033] Specifically, a middle part is defined. Along the extension direction X1, the distance between the middle part and the detection probe 22 is equal to the distance between the middle part and the light source 21. Along the extension direction X1, the distance between the first sub-air hole 241 and the middle part is a first distance L1, the distance between the first sub-air hole 241 and the light source 21 is a second distance L2, L1 > L2, the distance between the third sub-air hole 251 and the middle part is a third distance L3, and the distance between the third sub-air hole 251 and the detection probe 22 is a fourth distance L4, L3 > L4.
[0034] Further, the gas detection device includes a first circuit board 7, a second circuit board 71, and a third circuit board 72. Along the extension direction X1, the second circuit board 71 and the third circuit board 72 are respectively located on both sides of the housing part 2. The light source 21 is electrically connected to the second circuit board 71, the detection probe 22 is electrically connected to the third circuit board 72, both the second circuit board 71 and the third circuit board 72 are electrically connected to the first circuit board 7, and the first circuit board 7, the second circuit board 71, and the third circuit board 72 are all located in the inner cavity 11.
[0035] In some embodiments, referring to Figure 2 and Figure 5 , the housing part 2 has a first part 26 and a second part 27. The extension direction X1 is perpendicular to the thickness direction Z of the gas detection device. Along the thickness direction Z of the gas detection device, the first part 26 is closer to the first communication hole 12 than the second part 27, and the first part 26 has the first air hole 24 and the second air hole 25.
[0036] In some embodiments, both the first part 26 and the second part 27 have the first air hole 24 and the second air hole 25.
[0037] In some embodiments, a projection plane S is defined. The projection plane S is perpendicular to the thickness direction Z of the gas detection device. The orthographic projection of the first air hole 24 on the projection plane S is at least partially located within the orthographic projection of the first communication hole 12 on the projection plane S, and the orthographic projection of the second air hole 25 on the projection plane S is at least partially located within the orthographic projection of the second communication hole 13 on the projection plane S.
[0038] Specifically, referring to Figure 4 and Figure 6, the orthographic projection of the first air hole 24 on the projection plane S is the first projection S1, the orthographic projection of the first communication hole 12 on the projection plane S is the second projection S2, the orthographic projection of the second air hole 25 on the projection plane S is the third projection S3, and the orthographic projection of the second communication hole 13 on the projection plane S is the fourth projection S4; at least part of the first projection S1 is located within the second projection S2, and at least part of the third projection S3 is located within the fourth projection S4.
[0039] In some embodiments, referring to Figure 7 and Figure 8 , the housing 1 has a first communication hole 12 and a second communication hole 13, at least part of the first projection S1 is located within the second projection S2, and at least part of the third projection S3 is located within the fourth projection S4; further, the orthographic projections of the first sub-air hole 241 and the second sub-air hole 242 on the projection plane S are at least partially located within the second projection S2, and the orthographic projections of the third sub-air hole 251 and the fourth sub-air hole 252 on the projection plane S are at least partially located within the second projection S2. Specifically, the housing 1 has a first communication hole 12, a second communication hole 13, and at least one third communication hole 17. Along the extension direction X1, at least part of the third communication hole 17 is located between the first communication hole 12 and the second communication hole 13.
[0040] In some embodiments, referring to Figure 4 and Figure 6 , the housing 1 has two first communication holes 12 and two second communication holes 13. The two first communication holes 12 respectively correspond to the first sub-air hole 241 and the second sub-air hole 242, and the two second communication holes 13 respectively correspond to the third sub-air hole 251 and the fourth sub-air hole 252. At least part of the first projection S1 is located within the second projection S2, and at least part of the third projection S3 is located within the fourth projection S4.
[0041] In some embodiments, referring to Figure 9 and Figure 10 , the gas detection device includes a blocking portion 3. The blocking portion 3 has a diffusion cavity 31. The diffusion cavity 31 is in gas communication with the first communication hole 12 and the second communication hole 13, and both the first air hole 24 and the second air hole 25 are in communication with the diffusion cavity 31.
[0042] In some embodiments, referring to Figure 9 and Figure 10, the diffusion cavity 31 has an air inlet 311 and a bottom port 312; along the thickness direction Z of the gas detection device, the air inlet 311 is closer to the first communication hole 12 than the bottom port 312, the flow area of the air inlet 311 is larger than the flow area of the bottom port 312, and at least part of the first air hole 24 and at least part of the second air hole 25 are both located at the air inlet 311. It is realized that the detected gas outside the gas detection device is converged from the large opening of the air inlet 311 to the small opening of the bottom port 312 for guiding, so as to accelerate the filling of the detected gas into the detection cavity 23.
[0043] Specifically, referring to Figure 9 and Figure 10 , at least part of the housing part 2 is located in the diffusion cavity 31. Further, at least part of the housing part 2 is located at the air inlet 311. The part of the housing part 2 located at the air inlet 311 has at least part of the first air hole 24, or the part of the housing part 2 located at the air inlet 311 has at least part of the second air hole 25, or the part of the housing part 2 located at the air inlet 311 has at least part of the first air hole 24 and at least part of the second air hole 25. Specifically, at least part of the first part 26 is located at the air inlet 311.
[0044] In some embodiments, referring to Figure 2 , Figure 9 and Figure 11 , the gas detection device includes a contact part 4 and a waterproof and breathable membrane 5. At least part of the contact part 4 is located between the first communication hole 12 and the air inlet 311. The contact part 4 has a first hole 41 and a second hole 42. The contact part 4 and the outer shell 1 clamp the waterproof and breathable membrane 5. The first hole 41 is in gas communication with the first communication hole 12, the second hole 42 is in gas communication with the second communication hole 13, both the first hole 41 and the second hole 42 are in communication with the diffusion cavity 31, and the waterproof and breathable membrane 5 covers the first hole 41, the second hole 42, the first communication hole 12 and the second communication hole 13. Specifically, both the contact part 4 and the waterproof and breathable membrane 5 are located inside the outer shell 1, and at least part of the housing part 2 is located inside the outer shell 1.
[0045] In some embodiments, along the thickness direction Z of the gas detection device, at least part of the first air hole 24 is directly opposite to the first hole 41, and at least part of the second air hole 25 is directly opposite to the second hole 42.
[0046] Specifically, a projection plane S is defined. The projection plane S is perpendicular to the thickness direction Z of the gas detection device. The positive projection of the first air hole 24 on the projection plane S is at least partly located within the positive projection of the first hole 41 on the projection plane S, and the positive projection of the second air hole 25 on the projection plane S is at least partly located within the positive projection of the second hole 42 on the projection plane S.
[0047] In some embodiments, referring to Figure 9 and Figure 11, the abutting portion 4 has a limiting groove 43, the limiting groove 43 communicates with the first hole 41 and the second hole 42, at least part of the first air hole 24 and at least part of the second air hole 25 are located in the limiting groove 43, and at least part of the housing portion 2 is located in the limiting groove 43; the wall of the limiting groove 43 cooperates with at least part of the housing portion 2, and the housing portion 2 is cylindrical. Specifically, the part of the housing portion 2 located in the limiting groove 43 has at least part of the first air hole 24 and at least part of the second air hole 25. The cooperation between the limiting groove 43 and at least part of the housing portion 2 can improve the reliability between the abutting portion 4 and the housing portion 2 and reduce the influence of vibrations of the housing portion 2 during use.
[0048] In some embodiments, referring to Figure 12 , Figure 13 and Figure 14 , the abutting portion 4 has a groove 44, the outer shell 1 has a protruding portion 8, at least part of the protruding portion 8 is located in the groove 44, a horizontal direction is defined, the horizontal direction is perpendicular to the thickness direction Z of the gas detection device, and along the horizontal direction, both the groove 44 and the protruding portion 8 are located on one side of the waterproof breathable membrane 5.
[0049] Specifically, referring to Figure 13 and Figure 14 , a horizontal plane is defined, the horizontal plane is perpendicular to the thickness direction Z of the gas detection device, in the horizontal plane, the groove 44 is arranged around the waterproof breathable membrane 5, the protruding portion 8 is exposed to the inner cavity 11, at least part of the protruding portion 8 contacts the wall of the groove 44, or there is a gap between the protruding portion 8 and the groove 44.
[0050] Specifically, referring to Figure 12 , Figure 13 and Figure 14 , the abutting portion 4 has a welding rib 32, along the horizontal direction, the groove 44 is closer to the waterproof breathable membrane 5 than the welding rib 32, and in the horizontal plane, the welding rib 32 is arranged around the groove 44. The connection between the abutting portion 4 and the outer shell 1 is by ultrasonic welding. During welding, the welding rib 32 melts, and the groove 44 and the protruding portion 8 can block the melted welding rib 32, reducing the influence of the melted welding rib 32 on the waterproof breathable membrane 5.
[0051] In some embodiments, referring to Figure 11 and Figure 15 , the gas detection device includes a convex block 6, the convex block 6 is connected to the abutting portion 4, the outer shell 1 has a receiving groove 15 and a groove wall 16, the groove wall 16 is exposed to the receiving groove 15, and at least part of the abutting portion 4 and at least part of the convex block 6 are located in the receiving groove 15. Specifically, the gas detection device includes at least two convex blocks 6, and in the horizontal plane, the at least two convex blocks 6 are arranged around the abutting portion 4. The abutting portion 4 contacts the groove wall 16 through the at least two convex blocks 6, which can reduce the manufacturing precision of the abutting portion 4. When installing the abutting portion 4, since it only contacts the groove wall 16 through the at least two convex blocks 6, it is more convenient to install.
[0052] In some embodiments, with reference to Figure 11 and Figure 15 , a horizontal direction is defined. The horizontal direction is perpendicular to the thickness direction Z of the gas detection device. Along the horizontal direction, the bump 6 is located on one side of the abutting portion 4, and the bump 6 and the abutting portion 4 are an integral part.
[0053] The above embodiments are only used to illustrate the present application and do not limit the technical solutions described in the present application. The understanding of the present application should be based on those skilled in the art of the relevant technical field. Although this specification has described the present application in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the relevant technical field can still modify the present application or make equivalent replacements. All technical solutions and their improvements that do not depart from the spirit and scope of the present application shall be covered within the scope of the claims of the present application.
Claims
1. A gas detection device, characterized in that, It includes a housing, a housing part, a light source, and a detection probe. The housing has an inner cavity, at least part of the housing part is located in the inner cavity, the housing part has a detection cavity, and at least part of the light source and at least part of the detection probe are both located in the detection cavity; The housing part has a first air hole, and the first air hole communicates with the detection cavity; the housing has a first communication hole, the first communication hole penetrates through the housing, the first communication hole is in gas communication with the first air hole, and along the thickness direction of the gas detection device, at least part of the first air hole faces the first communication hole.
2. The gas detection device according to claim 1, characterized in that: The housing part has a second air hole, and the second air hole communicates with the detection cavity. The housing has a second communication hole, the second communication hole penetrates through the housing, the second communication hole is in gas communication with the second air hole, and along the thickness direction of the gas detection device, at least part of the second air hole faces the second communication hole; The first air hole is closer to the light source than the second air hole, the second air hole is closer to the detection probe than the first air hole, the distance between the first air hole and the second air hole is greater than the distance between the first air hole and the light source, and the distance between the first air hole and the second air hole is greater than the distance between the second air hole and the detection probe.
3. The gas detection device according to claim 2, characterized in that: The gas detection device has an extending direction, and the detection cavity extends along the extending direction; along the extending direction, both the first air hole and the second air hole are located between the light source and the detection probe; The first air hole includes a first sub-air hole and a second sub-air hole, and along the extending direction, the first sub-air hole is closer to the light source than the second sub-air hole; The second air hole includes a third sub-air hole and a fourth sub-air hole, and along the extending direction, the third sub-air hole is closer to the detection probe than the fourth sub-air hole.
4. The gas detection device according to claim 2, characterized in that: The housing part has a first part and a second part, the extending direction is perpendicular to the thickness direction of the gas detection device, and along the thickness direction of the gas detection device, the first part is closer to the first communication hole than the second part, and the first part has the first air hole and the second air hole.
5. The gas detection device according to claim 2, characterized in that: The housing part has a first part and a second part, the extending direction is perpendicular to the thickness direction of the gas detection device, and along the thickness direction of the gas detection device, the first part is closer to the first communication hole than the second part, and both the first part and the second part have the first air hole and the second air hole.
6. The gas detection device according to any one of claims 2-5, characterized in that: The gas detection device includes a blocking part, the blocking part has a diffusion cavity, the diffusion cavity is in gas communication with the first communication hole and the second communication hole, and both the first air hole and the second air hole are in communication with the diffusion cavity; The diffusion cavity has an air inlet and a bottom port; along the thickness direction of the gas detection device, the air inlet is closer to the first communication hole than the bottom port, the flow area of the air inlet is larger than that of the bottom port, and at least part of the first air hole and at least part of the second air hole are both located at the air inlet.
7. The gas detection device according to claim 6, characterized in that: The gas detection device includes a contact part and a waterproof breathable membrane. At least part of the contact part is located between the first communication hole and the air inlet. The contact part has a first hole and a second hole. The contact part and the housing clamp the waterproof breathable membrane. The first hole is in gas communication with the first communication hole, the second hole is in gas communication with the second communication hole, both the first hole and the second hole are in communication with the diffusion cavity, and the waterproof breathable membrane covers the first hole, the second hole, the first communication hole and the second communication hole. Along the thickness direction of the gas detection device, at least part of the first air hole is directly opposite to the first hole, and at least part of the second air hole is directly opposite to the second hole.
8. The gas detection device according to claim 7, wherein: The contact part has a limiting groove which is in communication with the first hole and the second hole. At least part of the first air hole and at least part of the second air hole are located in the limiting groove, and at least part of the housing part is located in the limiting groove; the wall of the limiting groove cooperates with at least part of the housing part, and the housing part is cylindrical.
9. The gas detection device according to claim 7, wherein: The contact part has a groove, and the housing has a protruding part. At least part of the protruding part is located in the groove. Defining a horizontal direction which is perpendicular to the thickness direction of the gas detection device, along the horizontal direction, both the groove and the protruding part are on one side of the waterproof breathable membrane.
10. The gas detection device according to claim 7, wherein: The gas detection device includes a convex block which is connected to the contact part. The housing has a receiving groove and a groove wall which is exposed in the receiving groove. At least part of the contact part and at least part of the convex block are both located in the receiving groove. Defining a horizontal direction which is perpendicular to the thickness direction of the gas detection device, along the horizontal direction, the convex block is on one side of the contact part, and the convex block and the contact part are an integral part.