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CN-121994879-A - Sensing device

CN121994879ACN 121994879 ACN121994879 ACN 121994879ACN-121994879-A

Abstract

The application provides a sensing device which is used for improving the detection accuracy. The sensing device comprises a sensing assembly, wherein the sensing assembly comprises a shell, the shell is provided with a first detection cavity and a first detection element positioned in the first detection cavity, the shell comprises a first side wall part and a first bottom wall part which define the first detection cavity, at least one of the first side wall part and the first bottom wall part is provided with a communication hole, the communication hole penetrates through the first side wall part or the first bottom wall part along the inner side and the outer side, and the height of the communication hole is lower than that of the first detection element.

Inventors

  • Request for anonymity
  • Request for anonymity

Assignees

  • 杭州三花研究院有限公司

Dates

Publication Date
20260508
Application Date
20241031

Claims (13)

  1. 1. The sensing device is characterized by comprising a sensing assembly (200), wherein the sensing assembly (200) comprises a shell (201) and a first detection element (241), the shell (201) is provided with a first detection cavity (201 a), the first detection element (241) is located in the first detection cavity (201 a), the shell (201) comprises a first side wall part (212) and a first bottom wall part (2431) which define the first detection cavity (201 a), at least one of the first side wall part (212) and the first bottom wall part (2431) is provided with a communication hole (243 a), the communication hole (243 a) penetrates through the first side wall part (212) or the first bottom wall part (2431) in the inner and outer directions, and the height of the communication hole (243 a) relative to the first bottom wall part (31) is lower than the height of the first bottom wall part (2431) relative to the first detection element (241) in the height direction of the sensing device.
  2. 2. The sensing device according to claim 1, wherein the housing (201) further has a communication channel (201 c), the communication channel (201 c) communicating the first detection chamber (201 a) and the outside of the housing (201).
  3. 3. The sensing device of claim 2, wherein the sensing assembly (200) further comprises a second detection element (242), the housing (201) further having a second detection cavity (201 b), the second detection element (242) being located within the second detection cavity (201 b); a portion of the communication channel (201 c) is located at a wall portion of the housing (201) defining the second detection chamber (201 b).
  4. 4. A sensing device according to claim 3, wherein the sensing assembly (200) comprises a detection assembly (24), the detection assembly (24) comprising the first detection element (241) and the second detection element (242), the detection assembly (24) further comprising a base (243) on which the first detection element (241), the second detection element (242) are mounted; The shell (201) comprises a cover body (21) and a base (243), wherein an opening is formed in the bottom of the cover body (21), the base (243) is in plugging fit with the opening of the cover body (21), a partition wall part (213) is arranged in the cover body (21), an inner cavity of the shell (201) is divided into a first detection cavity (201 a) and a second detection cavity (201 b) by the partition wall part (213), a part of the base (243) is the first bottom wall part (2431) and a part of the base (2432) is used for limiting the second detection cavity (201 b), a part of a top wall part of the cover body is a first top wall part (2111), the first top wall part (2111) corresponds to the first detection cavity (201 a), a part of the top wall part of the cover body is a second top wall part (2), and the second top wall part (2112) corresponds to the second detection cavity (201 b); a portion of the communication passage (201 c) is located at the second top wall portion (2112).
  5. 5. The sensing device according to claim 4, wherein the communication channel (201 c) includes a first channel (21 c) and a second channel (21 d), the first channel (21 c) is located at the second top wall portion (2112), one end of the first channel (21 c) has a first opening (21 c 1) at an outer surface of the second top wall portion (2112), the second channel (21 d) is located at the partition wall portion (213), and the second channel (21 d) communicates the first channel (21 c) and the first detection chamber (201 a).
  6. 6. The sensing device according to claim 5, wherein the second channel (21 d) comprises a first channel section (21 d 1) and a second channel section (21 d 2), the first channel section (21 d 1) extends up and down, the first channel (21 c) has the other end opposite to the first opening (21 c 1), the first channel section (21 d 1) communicates with the other end of the first channel (21 c), one end of the second channel section (21 d 2) communicates with the first channel section (21 d 1), the other end has a third opening (21 d 21) at a surface of the partition wall (213) facing the first detection chamber (201 a), the first channel section (21 d 1) has a second opening (21 d 11) at a bottom end surface of the partition wall (213), and the partition wall (213) abuts against the base (243).
  7. 7. The sensing device according to claim 4, wherein the communication channel (201 c) comprises a third channel (21 e) and a fourth channel (21 f), the third channel (21 e) comprising a third channel section (21 e 1) and a fourth channel section (21 e 2) in communication, the third channel section (21 e 1) extending from the second top wall portion (2112) to the first top wall portion (2111), the fourth channel section (21 e 2) having a fourth opening (21 e 21) at the first top wall portion (2111) towards the inner surface of the first detection chamber (201 a); The fourth channel (21 f) comprises a fifth channel section (21 f 1) and a sixth channel section (21 f 2) which are communicated, the fifth channel section (21 f 1) extends up and down, and the sixth channel section (21 f 2) is provided with a fifth opening (21 f 21) on the outer surface of the side wall part corresponding to the second detection cavity (201 b).
  8. 8. The sensing device according to claim 4, wherein the communication channel (201 c) includes a fifth channel (21 g) and a sixth channel (21 h), the fifth channel (21 g) extends from the second top wall portion (2112) to the first top wall portion (2111), one end of the fifth channel (21 g) has a sixth opening (21 g 1) at an outer surface of a wall portion corresponding to the second detection chamber (201 b), one end of the sixth channel (21 h) communicates with the other end of the fifth channel (21 g), and the other end of the sixth channel (21 h) has a seventh opening (21 h 1) at the first top wall portion (2111) toward an inner surface of the first detection chamber (201 a).
  9. 9. The sensing device according to any one of claims 1-8, wherein the first bottom wall portion (2431) has a plurality of communication holes (243 a), at least one of the communication holes (243 a) being located in a middle portion of the first bottom wall portion (2431).
  10. 10. The sensing device according to any one of claims 1-8, wherein the sensing assembly (200) further comprises an annular support base (23), the support base (23) being located below the housing (201) and supporting the housing (201), the side of the support base (23) having a window (23 a), the sensing device further comprising a circuit board (100), the support base (23) being supported on the circuit board (100).
  11. 11. The sensing device according to claim 10, wherein the support base (23) comprises an annular support body (231) and a plurality of support columns (232) arranged at the bottom of the annular support body (231), the window (23 a) is formed between adjacent support columns (232), and the support columns (232) are supported on the circuit board (100).
  12. 12. The sensor device of claim 11, wherein an upper end surface of the annular supporting body (231) has an annular step portion (2311), the step portion (2311) includes a step side wall (23111) and a step face portion (23112) located inside the step side wall (23111), and the housing (201) is supported on the step face portion (23112).
  13. 13. The sensing device according to claim 12, wherein the bottom of the housing (201) is provided with an annular flange (2011), the sensing assembly (200) further comprises a positioning seat (22), the positioning seat (22) comprises an annular positioning body (221), a part of the housing (201) is located in the annular positioning body (221), the annular positioning body (221) is abutted with the annular flange (2011), and the positioning seat (22) further comprises a positioning support (222) located at the bottom of the annular positioning body (221), and the positioning support (222) is connected with the circuit board (100).

Description

Sensing device Technical Field The application relates to the technical field of detection, in particular to a sensing device. Background The air conditioning system can adopt environment-friendly refrigerant, but the environment-friendly refrigerant has combustibility relative to the traditional refrigerant and has certain potential safety hazard, so that the sensor can be arranged to detect the concentration of gas to judge whether the refrigerant leaks or not, so that the control system can make closing and alarming in time, and the potential safety hazard caused by the environment-friendly refrigerant is reduced. The sensor is provided with a gas chamber, the gas chamber comprises a thermosensitive element, the top of the gas chamber is provided with a gas inlet, when gas enters the gas chamber from the gas inlet, the thermal conductivity of the gas in the gas chamber changes, the thermal conductivity can influence the heat dissipation condition of the thermosensitive element, and if the thermal conductivity of the gas is high, the heat can be dissipated from the thermosensitive element more easily, so that the resistance is reduced. This change in resistance is then converted into an electrical signal by a signal conditioning and conversion circuit, thereby effecting a measurement of the gas concentration. However, since the gas inlet is provided at the top of the gas chamber, the refrigerant in the gas is liable to blow off before falling into the gas inlet, resulting in inaccurate detection by the sensor. Disclosure of Invention The application aims to provide a sensing device which is used for improving the detection accuracy. In order to solve the technical problems, the application provides a sensing device which comprises a sensing assembly, wherein the sensing assembly comprises a shell and a first detection element, the shell is provided with a first detection cavity, the first detection element is positioned in the first detection cavity, the shell comprises a first side wall part and a first bottom wall part which define the first detection cavity, at least one of the first side wall part and the first bottom wall part is provided with a communication hole, the communication hole penetrates through the first side wall part or the first bottom wall part along the inner side and the outer side, and the height of the communication hole relative to the first bottom wall part is lower than the height of the first detection element relative to the first bottom wall part along the height direction of the sensing device based on the first bottom wall part. It can be seen that the communication hole of the sensing device in the above-mentioned solution penetrates through the first side wall portion or the first bottom wall portion along the inside and outside, the communication hole can be used for communicating the first detection cavity and the outside communication hole, the communication hole is set to be lower than the height of the first detection element, thus, the refrigerant in the gas can be deposited at a lower position, and thus, the refrigerant entering the first detection cavity from the communication hole, for example, the blown-off refrigerant can be deposited at a lower position based on the action of gravity, and after the refrigerant is accumulated to reach the corresponding concentration, the refrigerant is sensed by the first detection element to give an alarm, so that the alarm prompt is more accurate. Drawings FIG. 1 is a schematic diagram of a sensing device according to an embodiment of the present application; FIG. 2 is a schematic diagram of a portion of the sensing device of FIG. 1 from a top view; FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2; FIG. 4 is a schematic diagram of a sensing assembly of the sensing device of FIG. 1; FIG. 5 is a schematic diagram of the detecting assembly of FIG. 3; FIG. 6 is a schematic view of the cover in FIG. 3; FIG. 7 is a cross-sectional view of the housing of FIG. 6; FIG. 8 is an enlarged schematic view of the portion B of FIG. 3; FIG. 9 is a schematic view of a cover of a sensing device according to another embodiment of the present application; FIG. 10 is a schematic cross-sectional view of the cover of FIG. 9 taken in a first direction; FIG. 11 is a schematic view of a cover of a sensing device according to another embodiment of the application; FIG. 12 is a schematic cross-sectional view of the cover of FIG. 11 taken in a first direction; FIG. 13 is a schematic view of the support base of FIG. 1; FIG. 14 is an enlarged view of the portion D of FIG. 13; FIG. 15 is an enlarged schematic view of portion C of FIG. 3; FIG. 16 is a schematic view of the positioning seat in FIG. 1; fig. 17 is an enlarged schematic view of the portion D in fig. 1. The reference numerals are explained as follows: 100 a-connecting holes; 200-sensing components, 201-a shell, 2011-an annular flange, 201 a-a first detection cavity, 201 b