Gas sensor
By introducing a protective shell and air-induced air ring structure into the air-sensitive sensor, combined with the design of the C-shaped cavity and vortex plate and vortex tank, the dust is automatically cleaned using wind and vortex centrifugal force, which solves the problem that the sensor cannot effectively deal with small dust, and improves the self-cleaning ability and service life.
Patent Information
- Application Number
- CN202422267776.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-18
- Publication Date
- 2025-07-18
- Estimated Expiration
- 2034-09-18
AI Technical Summary
Existing gas-sensitive sensors cannot effectively handle smaller dust, resulting in dust adhesion affecting the performance of gas-sensitive components.
An air-sensitive sensor is designed, using a protective shell and air-induced air ring structure, using the air-flowing wind force to blow away dust, and through the C-shaped inner cavity and the vortex plate and vortex tank, the vortex centrifugal force is used to automatically clean the dust, ensuring that the air blowing from different directions reduces the cleaning of dead corners.
Improves the self-cleaning capability of the sensor head, reduces dust adhesion, and extends the service life of the sensor.
Smart Images
Figure CN223122926U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of gas sensors. Background Art
[0002] In the prior art, gas sensors processed by a reactive magnetron sputtering instrument, especially gas sensors made of materials such as tungsten trioxide (WO3), have wide applications in the field of gas detection. The reactive magnetron sputtering instrument introduces reactive gases to chemically react with the sputtered target atoms or molecules on the substrate surface, thereby depositing a thin film with a specific chemical composition. This thin film usually has excellent gas-sensing characteristics to improve the performance of the gas-sensing element in the gas sensor. The gas-sensing element is mainly used to detect target gases in the air.
[0003] When the gas sensor is in use, its gas-sensing element is generally exposed to the outside and is wrapped with a breathable metal mesh to prevent excessive dust from adhering to the gas-sensing element. However, in order for air to contact the gas-sensing element and ensure air circulation, the breathable metal mesh needs to have good air permeability, but it cannot handle dust with smaller mesh holes.
[0004] Therefore, it is very necessary to propose a new gas sensor to solve the above problems. Content of the Utility Model
[0005] The purpose of the utility model is to provide a gas sensor to solve the problem of being unable to handle smaller dust as mentioned above.
[0006] To achieve the above purpose, the utility model provides the following technical solution: A gas sensor includes a sensor body, a sensing head is arranged on the sensor body, and a coating surface is formed on the surface of the sensing head by a magnetron sputtering instrument;
[0007] An air guiding ring is fixedly arranged outside the sensor body, and a protective housing is fixedly arranged outside the air guiding ring;
[0008] The outer side of the protective housing is arranged in an arc shape, a C-shaped inner cavity is opened on the inner side of the protective housing, the outer side of the air guiding ring is arranged in a conical shape, and the inner wall corners of the C-shaped inner cavity are seamlessly connected to the conical part of the air guiding ring.
[0009] Preferably, the sensing head is arranged in a hemispherical shape, a vortex plate is adhesively arranged outside the sensing head, and the vortex plate is arranged in a spiral shape;
[0010] A vortex groove is opened on the outer side of the protective housing.
[0011] Preferably, the inner diameter of the vortex groove away from the air guiding ring gradually increases.
[0012] Preferably, a plurality of the vortex plates and vortex grooves are provided and the number of them is equal, and the plurality of vortex plates and vortex grooves are arranged in an annular array.
[0013] Preferably, one side opening of the C-shaped inner cavity points to the sensing head.
[0014] Preferably, a plurality of wire outlet terminals are provided at one end of the sensor body.
[0015] The beneficial technical effects of the present utility model are as follows: through the arrangement of the protective shell and the air guiding ring, when the sensing head is in use, the wind flowing in the air is utilized to blow off the dust on the surface of the sensing head, and through the arrangement of the C-shaped inner cavity, the surface of the sensing head is cleaned secondly, and the blowing directions of the two winds are different, and the dust removal dead angles are reduced by blowing from two directions, so as to improve the self-cleaning ability of the sensing head and facilitate the long-term use of the sensing head.
[0016] Through the arrangement of the vortex plates and vortex grooves, when the wind blows away the dust, the centrifugal force of the eddy current is utilized to automatically discharge the dust, so as to reduce the proportion of the dust content inside the C-shaped inner cavity as a whole, and further reduce the probability of dust adhering to the sensing head.
[0017] Through the arrangement of the vortex grooves, the angle at which the wind can enter the protective shell is greatly increased, so that the wind coming from the side can also clean the sensing head, and the effective wind receiving range is increased. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic structural diagram of a gas sensor of the present utility model.
[0019] Figure 2 It is a schematic structural diagram of another perspective of the gas sensor of the present utility model.
[0020] Figure 3 It is a schematic sectional structural diagram of the protective shell and the air guiding ring of the present utility model.
[0021] Figure 4 It is a schematic structural diagram of the protective shell of the present utility model.
[0022] In the figure: 1, sensor body; 2, sensing head; 3, wire outlet terminal; 4, protective shell; 5, air guiding ring; 6, C-shaped inner cavity; 7, vortex plate; 8, vortex groove. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.
[0024] As Figure 1 - Figure 4 shown, the present invention provides a gas sensor, including a sensor body 1. The sensor body 1 is a gas sensor, which is prior art and will not be elaborated here. A sensing head 2 is provided on the sensor body 1. The sensing head 2 is the main component for gas detection and is a gas-sensitive element. The surface of the sensing head 2 is processed by a magnetron sputtering instrument to form a coating surface. The sensing head 2 is sputter-processed by the magnetron sputtering instrument to coat the sensing head 2. Through the target being bombarded by high-energy particles, atoms or molecules are sputtered from the surface of the target and deposited on the substrate. The substrate is a gas-sensitive element to form a thin film. The action of the magnetic field makes the electron path bend, increasing the collision probability between electrons and gas atoms, improving the ionization rate of the gas, thereby increasing the sputtering rate of the target and improving the uniformity and adhesion of the film layer.
[0025] A plurality of lead-out terminals 3 are provided at one end of the sensor body 1. Through the lead-out terminals 3, the sensor body 1 is connected and installed on a gas detector. The gas detector is the carrier of the gas-sensitive detector and is prior art and will not be elaborated here.
[0026] An air guiding ring 5 is fixedly provided outside the sensor body 1. The outside of the air guiding ring 5 is tapered. When the wind blows towards the sensor body 1, a protective housing 4 is fixedly provided outside the air guiding ring 5. The wind enters between the air guiding ring 5 and the protective housing 4. The outside of the protective housing 4 is arc-shaped. A C-shaped inner cavity 6 is opened on the inner side of the protective housing 4. One side of the C-shaped inner cavity 6 opens towards the sensing head 2. The sensing head 2 is hemispherical. A vortex plate 7 is adhesively provided outside the sensing head 2. The vortex plate 7 is spiral-shaped.
[0027] The sensor body 1 generally needs to be set in a place with air circulation to ensure that the target gas in the air can flow near the gas sensor, be detected by the sensing head 2, and give feedback for alarm processing. When the gas sensor is in use, when the external wind flows near the sensing head 2, the wind energy will first enter the space between the protective housing 4 and the air guiding ring 5. The wind energy first contacts the air guiding ring 5, causing the wind energy to move along the conical surface of the air guiding ring 5 towards the C-shaped inner cavity 6 in the protective housing 4. Through the setting of the C-shaped inner cavity 6, the wind energy moves along the C-shaped inner cavity 6. When the wind energy first contacts the sensing head 2, the wind energy is used to initially clean the sensing head 2 to blow away the dust on it, and the dust on the sensing head 2 can be uniformly processed regardless of size. When the wind energy first contacts the sensing head 2 from the outside, the wind blows from the outside to the inside through the protective housing 4, and after returning through the C-shaped inner cavity 6, the wind blows from the inside to the outside through the C-shaped inner cavity 6. The blowing directions are different, and blowing from two directions reduces the cleaning dead angle.
[0028] Through the settings of the protective housing 4 and the air guiding ring 5, when the sensing head 2 is in use, the wind force flowing in the air is utilized to blow away the dust on the surface of the sensing head 2. And through the setting of the C-shaped inner cavity 6, the surface of the sensing head 2 is cleaned a second time. Moreover, the blowing directions of the two wind energies are different, and blowing from two directions reduces the cleaning dead angle, improving the self-cleaning ability of the sensing head 2 and facilitating the long-term use of the sensing head 2.
[0029] A vortex groove 8 is provided on the outer side of the protective housing 4. The inner diameter of the vortex groove 8 away from the air guiding ring 5 gradually increases, enabling more wind entering the protective housing 4 while relatively reducing the wind discharged from the protective housing 4 through the vortex groove 8. There are multiple vortex plates 7 and vortex grooves 8 and the number is equal. The multiple vortex plates 7 and vortex grooves 8 are both arranged in a circular array. The inner wall corners of the C-shaped inner cavity 6 are seamlessly connected to the conical part of the air guiding ring 5. Through the setting of the vortex groove 8, the angle at which the wind can enter the protective housing 4 is greatly increased, enabling the wind coming from the side to also clean the sensing head 2 and increasing the effective wind-receiving range.
[0030] When the wind contacts the sensing head 2, it first contacts the vortex plate 7. The vortex plate 7 conducts vortex air guiding on the wind entering the protective housing 4 part, enabling the wind energy to enter the C-shaped inner cavity 6 in a rotational manner. When the wind energy carries away the dust, through the centrifugal force of the vortex, the dust carried in the wind adheres tightly to the C-shaped inner cavity 6, causing the dust to be discharged through the vortex groove 8 to reduce the dust in the C-shaped inner cavity 6.
[0031] Through the settings of the vortex plate 7 and the vortex groove 8, when the wind energy blows away the dust, the centrifugal force of the vortex is utilized to automatically discharge the dust, thereby overall reducing the proportion of dust content inside the C-shaped inner cavity 6, and further reducing the probability of dust adhering to the sensing head 2.
Claims
1. A gas sensor, comprising a sensor body (1), and a sensing head (2) is provided on the sensor body (1), characterized in that: The surface of the sensing head (2) is processed by a magnetron sputtering instrument to form a coated surface; an air guiding ring (5) is fixedly arranged outside the sensor body (1), and a protective housing (4) is fixedly arranged outside the air guiding ring (5); the outer side of the protective housing (4) is arc-shaped, a C-shaped inner cavity (6) is formed inside the protective housing (4), the outer side of the air guiding ring (5) is conical, and the inner wall corners of the C-shaped inner cavity (6) are seamlessly connected to the conical part of the air guiding ring (5).
2. The gas sensor according to claim 1, wherein: The sensing head (2) is hemispherical, and a vortex plate (7) is adhesively arranged outside the sensing head (2), and the vortex plate (7) is spiral; a vortex groove (8) is formed outside the protective housing (4).
3. The gas sensor according to claim 2, wherein: The inner diameter of the vortex groove (8) away from the air guiding ring (5) gradually increases.
4. The gas sensor according to claim 2, wherein: Both the vortex plate (7) and the vortex groove (8) are provided with a plurality of them and the number is equal, and the plurality of vortex plates (7) and vortex grooves (8) are both arranged in a circular array.
5. The gas sensor according to claim 1, characterized in that: One side of the C-shaped inner cavity (6) is open and points to the sensing head (2).
6. The gas sensor according to claim 1, characterized in that: A plurality of lead-out terminals (3) are arranged at one end of the sensor body (1).