Electronic nose device

Abstract

The invention discloses an electronic nose device which comprises a shell, a detection assembly, an air curtain cover and a power assembly. The shell is provided with an air inlet channel and an air outlet channel surrounding the periphery of the air inlet channel. The detection assembly is arranged in the air inlet channel and is used for qualitatively and quantitatively detecting the components of the passing to-be-detected gas. The air curtain cover is installed on the shell, an air inlet of the air curtain cover communicates with the air inlet channel, and an air outlet surrounds the air inlet and communicates with the air outlet channel. The power assembly is divided into two parts, one part is located in the air outlet channel and used for sucking in external air, the external air is exhausted through an air outlet of the air curtain cover, and a hollow cylindrical or conical air curtain is formed. And the other part is positioned in the air inlet channel and is responsible for introducing the to-be-detected gas wrapped by the air curtain into the air inlet channel from the front of the air outlet of the air curtain cover. The electronic nose device can effectively improve the detection efficiency of the to-be-detected gas, ensures that the detection process is quicker and more accurate, and meets the practical requirements of adjustable orientation and more accurate positioning for gas detection in practical application.

Description

Technical Field

[0001] Embodiments of the present invention relate to the technical field of electronic nose devices, and more specifically, the present invention relates to an electronic nose device. Background Art

[0002] The electronic nose device is a bionic olfactory organ composed of a large number of detection components. It can sense the components to be detected in an object through the free diffusion of the gas molecules to be detected. The electronic nose device has the significant advantages of small size, low cost, low power consumption and fast response. It has been widely used in many fields such as food, medical treatment, environmental monitoring and industrial production. The working principle of the electronic nose device is based on the interaction between the components to be detected and the detection components. When the components to be detected in the gas to be detected are captured by the detection components of the electronic nose device, these components to be detected will physically or chemically react with specific materials on the surface of the detection components, thereby changing the conductivity, capacitance or other characteristics of the sensor. The detection components identify different odors by detecting these changes by themselves. The core part of the electronic nose device is the detection component, which is made of a variety of materials that are specific to different components to be detected. Each detection component has a high responsiveness to a specific component to be detected or a group of components to be detected.

[0003] However, although electronic nose devices have shown great potential in many fields, they are often subject to low detection efficiency due to the influence of various factors (such as performance limitations of detection components or environmental factors), making it difficult to meet the demand for faster and more accurate gas detection in practical applications. Summary of the invention

[0004] In order to solve one or more of the technical problems mentioned above, the present invention provides an electronic nose device that can effectively improve the detection efficiency of the gas to be detected and ensure that the detection process is faster and more accurate to meet the needs of faster and more accurate gas detection in practical applications.

[0005] An embodiment of the present invention provides an electronic nose device, which includes:

[0006] A housing, comprising an air inlet channel and an air outlet channel arranged therein, wherein the air outlet channel is arranged at the periphery of the air inlet channel along the circumference of the air inlet channel;

[0007] A detection component, which is arranged in the air inlet channel of the shell and performs qualitative and quantitative detection on the components to be detected in the gas to be detected passing through the air inlet channel;

[0008] an air curtain cover, which is arranged on the housing and includes an air inlet communicated with the inlet of the air inlet channel, and an air outlet surrounding the air inlet and communicated with the outlet of the air outlet channel;

[0009] A power assembly, one part of which is arranged in the air outlet channel of the shell, and is used to introduce the air outside the shell into the air outlet channel and discharge it from the air outlet of the wind curtain cover, so as to form a hollow cylindrical or hollow conical wind curtain in front of the air outlet of the wind curtain cover, and another part of the power assembly is arranged in the air inlet channel of the shell, and is used to introduce the gas to be tested in front of the air outlet of the wind curtain cover and wrapped by the wind curtain into the air inlet channel.

[0010] Furthermore, the power assembly includes a rotating source arranged on the central axis of the air inlet channel, a first impeller arranged on the rotating source and located in the air inlet channel, and a second impeller fixed on the first impeller and located in the air outlet channel, the first impeller being capable of introducing the gas to be tested into the air inlet channel when rotated by the rotating source, and the second impeller being capable of introducing the air into the air outlet channel when rotated by the first impeller, wherein the blades of the second impeller and the blades of the first impeller are forward-inclined blades and backward-inclined blades respectively.

[0011] Furthermore, the shell also includes an induced air channel arranged at the outlet of the air outlet channel, the power assembly includes a rotating source arranged in the air inlet channel, a first impeller arranged on the rotating source and located in the air inlet channel, and an air multiplier arranged outside the shell and connected to the induced air channel, the first impeller can introduce the gas to be tested into the air inlet channel when being rotated by the rotating source, and the air multiplier is used to generate a traction airflow in the induced air channel and use the traction airflow to promote the air outside the shell to enter the air outlet channel and form the wind curtain when leaving the induced air channel, wherein the blades of the first impeller are backward-inclined blades.

[0012] Furthermore, the air inlet channel includes an introduction section for accommodating the rotation source and the first impeller, and a detection section connected to the introduction section and located downstream of the introduction section, the electronic nose device also includes a breathable dirt-blocking membrane arranged between the introduction section and the detection section, the electronic nose device also includes a partition tube fixedly arranged in the air inlet channel and dividing the detection section into a first sub-section and a second sub-section, the breathable dirt-blocking membrane covers the entrance of the partition tube, the detection component is arranged in the first sub-section, and the second sub-section surrounds the first sub-section and is not covered by the breathable dirt-blocking membrane.

[0013] Furthermore, the breathable dirt-blocking membrane is a porous film made of polytetrafluoroethylene.

[0014] Furthermore, the electronic nose device also includes a barrier member fixed in the partition tube and used for forming the first sub-segment into a serpentine channel.

[0015] Furthermore, the electronic nose device includes a semiconductor refrigerator and an electric heater arranged at the bottom of the partition tube.

[0016] Furthermore, the wind curtain cover includes a cylindrical or conical outer cover body, an inner cover body arranged in the outer cover body and is cylindrical or conical, and an inner channel formed in the inner cover body and an outer channel formed between the outer cover body and the inner cover body, wherein the inner channel has the air inlet and is connected to the air inlet channel, and the outer channel has the air outlet and is connected to the air outlet channel.

[0017] Furthermore, the detection component includes a semiconductor gas sensor, an electrochemical gas sensor, a microstructure gas sensor and / or a surface acoustic wave gas sensor, as well as a gas-liquid sensor, a temperature sensor and / or a humidity sensor, and the electronic nose device also includes a logic control unit electrically connected to the detection component.

[0018] Furthermore, the electronic nose device further comprises a purification component arranged in the air inlet channel and / or the air outlet channel, wherein the purification component comprises activated carbon, an ultraviolet lamp and / or a photocatalyst coating.

[0019] The electronic nose device provided in this embodiment introduces the gas to be tested in front of the air outlet of the air curtain cover of the shell into the air inlet channel by means of the power component, and sucks the gas to be tested into the detection component in the air inlet channel to perform qualitative and quantitative detection on the components to be tested in the gas to be tested, and then discharges the gas to be tested from the air inlet channel, so that the electronic nose device can identify and analyze the components to be tested in the gas to be tested. The power component can also form a hollow cylindrical or hollow conical wind curtain in front of the air outlet of the wind curtain cover by introducing air outside the shell into the air outlet channel and discharging it from the air outlet of the wind curtain cover. Since the air outlet channel is arranged at the periphery of the air inlet channel along the circumference of the air inlet channel, the wind curtain formed by the air can wrap the gas to be tested (in the wind curtain) to achieve the purpose of isolating the gas to be tested from the air outside the shell, thereby achieving the purpose of avoiding the adverse effects of the air outside the wind curtain on the gas to be tested in the wind curtain, such as turbulence, thereby improving the stability of the gas to be tested in the wind curtain sucked in by the power component. The two-way airflow channel method in which the power component drives the gas to be tested in the air inlet channel and the air in the air outlet channel to flow also greatly improves the flow efficiency of the gas to be tested in the electronic nose device. The effects of the wind curtain and the two-way airflow channel are superimposed, thereby enhancing the detection capability and response speed of the electronic nose device, thereby making the electronic nose device have a wider application prospect in the fields of environmental monitoring, food safety, medical diagnosis, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0021] Figure 1 A front view of an electronic nose device provided by an embodiment of the present invention is shown;

[0022] Figure 2 A schematic diagram of the structure of an electronic nose device provided by an embodiment of the present invention is shown;

[0023] Figure 3 A cross-sectional view of an electronic nose device with an air multiplier provided by an embodiment of the present invention is shown;

[0024] Figure 4 A cross-sectional view of an electronic nose device with a second impeller provided by an embodiment of the present invention is shown;

[0025] Figure 5 A schematic structural diagram of a rotation source, a first impeller and a casing provided in an embodiment of the present invention is shown.

[0026] 1. Shell; 11. Air inlet channel; 111. Introduction section; 112. Detection section; 1121. First subsection; 1122. Second subsection; 12. Air outlet channel; 13. Air induction channel;

[0027] 2. Detection components;

[0028] 3. Wind curtain cover; 31. Outer cover body; 311. Outer channel; 3111. Air outlet; 32. Inner cover body; 321. Inner channel; 3211. Air inlet;

[0029] 4. Power assembly; 41. Rotation source; 411. Motor; 412. Fan head; 42. First impeller; 43. Air multiplier; 44. Support frame; 45. Second impeller;

[0030] 5. Breathable dirt-blocking film;

[0031] 6. Partition tube;

[0032] 7. Partition parts;

[0033] 8. Purification component; 81. Activated carbon; 82. Ultraviolet lamp; 83. Photocatalyst coating;

[0034] 9. Semiconductor refrigerator;

[0035] 10. Electric heater. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0037] Figure 1 FIG. 4 shows a front view of an electronic nose device provided by this embodiment, Figure 2 FIG. 2 shows a schematic diagram of the structure of the electronic nose device provided in this embodiment. Figure 1 and Figure 2 As shown, the present embodiment provides an electronic nose device, which includes a shell 1, a detection component 2, a wind curtain cover 3 and a power component 4. The shell 1 includes an air inlet channel 11 and an air outlet channel 12 arranged therein, and the air outlet channel 12 is arranged at the periphery of the air inlet channel 11 along the circumference of the air inlet channel 11. The detection component 2 is arranged in the air inlet channel 11 of the shell 1, and performs qualitative and quantitative detection on the components to be detected in the gas to be detected passing through the air inlet channel 11. The wind curtain cover 3 is arranged on the shell 1, and includes an air inlet 3211 partially connected to the inlet of the air inlet channel 11, and an air outlet 3111 surrounding the air inlet 3211 and connected to the outlet of the air outlet channel 12. One part of the power assembly 4 is arranged in the air outlet channel 12 of the shell 1, and is used to introduce the air outside the shell 1 into the air outlet channel 12 and discharge it from the air outlet 3111 of the wind curtain cover 3, so as to form a hollow cylindrical or hollow conical wind curtain in front of the air outlet 3111 of the wind curtain cover 3, and the other part of the power assembly 4 is arranged in the air inlet channel 11 of the shell 1, and is used to introduce the gas to be tested in front of the air outlet 3111 of the wind curtain cover 3 and wrapped by the wind curtain into the air inlet channel 11.

[0038] The electronic nose device provided in this embodiment introduces the gas to be tested in front of the air outlet 3111 of the air curtain cover 3 of the shell 1 into the air inlet channel 11 by means of the power component 4, and sucks the gas to be tested into the detection component 2 in the air inlet channel 11 to perform qualitative and quantitative detection of the components to be detected in the gas to be tested, and then discharges the gas to be tested from the air inlet channel 11, so that the electronic nose device can identify and analyze the components to be detected in the gas to be tested. The power assembly 4 can also introduce the air outside the housing 1 into the air outlet channel 12 and discharge it from the air outlet 3111 of the air curtain cover 3 to form a hollow cylindrical or hollow conical wind curtain in front of the air outlet 3111 of the air curtain cover 3. Since the air outlet channel 12 is arranged at the periphery of the air inlet channel 11 along the circumference thereof, the wind curtain formed by the air can wrap the gas to be measured (in the wind curtain) to achieve the purpose of isolating the gas to be measured from the air outside the housing 1, thereby achieving the purpose of preventing the air outside the wind curtain from causing adverse effects such as turbulence on the gas to be measured in the wind curtain, thereby improving the stability of the gas to be measured in the wind curtain sucked in by the power assembly 4. The two-way wind flow channel mode in which the power assembly 4 drives the gas to be measured in the air inlet channel 11 and the air in the air outlet channel 12 to flow also greatly improves the circulation efficiency of the gas to be measured in the electronic nose device. The combined effects of the wind curtain and the dual airflow channels enhance the detection capability and response speed of the electronic nose device, thereby making the electronic nose device have a wider application prospect in the fields of environmental monitoring, food safety, medical diagnosis, etc.

[0039] Figure 3 FIG. 4 shows a cross-sectional view of an electronic nose device provided by the present embodiment with an air multiplier 43. Figure 3 Combined with Figure 1 and Figure 2As shown, in the present embodiment, the shell 1 also includes an air induction channel 13 arranged at the outlet of the air outlet channel 12, the power assembly 4 includes a rotating source 41 arranged in the air inlet channel 11, a first impeller 42 arranged on the rotating source 41 and located in the air inlet channel 11, and an air multiplier 43 arranged on the shell 1, the first impeller 42 can introduce the gas to be tested into the air inlet channel 11 when being rotated by the rotating source 41, and the injection hole of the air multiplier 43 is arranged in the air induction channel 13 or the wind curtain cover 3 and sprays the drawn airflow toward the air outlet 3111, so that the drawn airflow draws the air in the air outlet channel 12 before leaving the air outlet 3111 and forms a wind curtain after leaving the air outlet 3111, wherein the blades of the first impeller 42 are backward-inclined blades. The rotation source 41 generates power to rotate and drives the first impeller 42 disposed thereon to rotate accordingly. Since the blades of the first impeller 42 are backward inclined blades, the first impeller 42 can introduce the gas to be tested in front of the air outlet 3111 of the wind curtain into the air inlet channel 11 when rotating, so as to introduce the gas to be tested in front of the air outlet 3111 of the wind curtain cover 3 of the shell 1 into the air inlet channel 11, and inhale the gas to be tested into the detection component 2 in the air inlet channel 11 to perform qualitative and quantitative detection of the components to be tested in the gas to be tested. The air multiplier 43 can form a traction airflow in the air induction channel 13 through a jet of high-speed motion generated by itself, so as to utilize the pressure difference between the traction airflow and the air in the outlet of the air outlet channel 12 when leaving the traction airflow 13, so as to promote the air in the air outlet channel 12 to flow with the traction airflow, thereby causing the air outside the shell 1 to enter the air outlet channel 12 and form a hollow cylindrical or hollow conical wind curtain in front of the air outlet 3111 of the wind curtain cover 3.

[0040] It should be noted that, in this embodiment, the gas to be detected is a selected part of the air in the air, and the component to be detected is alcohol. In other embodiments, the component to be detected can also be other gases or liquids, etc., which are not specifically limited in this embodiment.

[0041] Figure 4 FIG. 4 shows a cross-sectional view of the electronic nose device provided by the present embodiment with a second impeller 45. Figure 4 Combined with Figure 1 and Figure 2As shown, in another embodiment, the power component 4 includes a rotating source 41 arranged on the central axis of the air inlet channel 11, a first impeller 42 arranged on the rotating source 41 and located in the air inlet channel 11, and a second impeller 45 fixedly arranged on the first impeller 42 and located in the air outlet channel 12, the first impeller 42 can introduce the gas to be tested into the air inlet channel 11 when rotated by the rotating source 41, and the second impeller 45 can introduce air into the air outlet channel 12 when rotated by the first impeller 42, wherein the blades of the second impeller 45 and the blades of the first impeller 42 are forward-inclined blades and backward-inclined blades respectively. The rotation source 41 generates power to rotate and simultaneously drives the first impeller 42 and the second impeller 45 disposed thereon to rotate accordingly. Since the first impeller 42 is a backward-inclined blade and is located in the air inlet channel 11, the gas to be tested at the entrance of the air inlet channel 11 of the housing 1 can be introduced into the air inlet channel 11 and discharged from the air inlet channel 11 under the drive of the rotation source 41. The second impeller 45 is a forward-inclined blade and is located in the air outlet channel 12. Therefore, the air outside the housing 1 can be sucked into the air outlet channel 12 and discharged from the air outlet channel 12 into the wind curtain cover 3 under the drive of the rotation source 41, and the air is forced to form a wind curtain in front of the air outlet 3111 of the wind curtain cover 3. Thus, the first impeller 42 and the second impeller 45 can rotate simultaneously under the drive of the same rotation source 41, and each can perform the work of sucking in and discharging the gas to be tested.

[0042] The embodiment provides a configuration method that uses a rotation source 41 to drive the first impeller 42 to rotate and an air multiplier 43 to achieve both the inhalation of the gas to be tested by the power component 4 and the discharge of air. In addition, since the rotation source 41 and the first impeller 42 are respectively arranged in the air inlet channel 11 and the air multiplier 43 is connected to the air outlet channel 12, the possibility of the gas to be tested in the air outlet channel 12 interfering with the gas to be tested in the air inlet channel 11 can be effectively avoided, and the error of the detection component 2 in qualitative and quantitative detection of the gas components to be tested in the gas to be tested in the air inlet channel 11 is effectively reduced. Another embodiment provides a configuration method that uses a rotation source 41, a first impeller 42 and a second impeller 45 to achieve both the inhalation of the gas to be tested by the power component 4 and the discharge of air. In addition, since the first impeller 42 and the second impeller 45 are both arranged on the rotation source 41, the first impeller 42 and the second impeller 45 can inhale and discharge the gas to be tested through the same rotation source 41, and the structure is simpler and easier to maintain and repair. In specific applications, the above two settings can be replaced according to different actual needs to better meet different actual needs.

[0043] Figure 5 FIG. 4 shows a schematic diagram of the structure of the rotation source 41, the first impeller 42 and the housing 1 provided in this embodiment. Figure 4 Combined with Figure 1-Figure 3As shown, the rotation source 41 includes a motor 411 fixed in the air inlet channel 11, a fan head 412 connected to the motor 411 and used to connect the first impeller 42 or the first impeller 42 and the second impeller 45, and the power assembly 4 also includes a support frame 44 connected to the motor 411 and the housing 1 respectively. The motor 411 drives the fan head 412 to rotate to drive the first impeller 42 or the first impeller 42 and the second impeller 45 to generate power, thereby inhaling the gas to be tested or exhausting air. Exemplarily, the motor 411 can adopt a split brushless outer rotor motor 411 to take advantage of its low noise and long life to ensure the quietness and stability of the power assembly 4 during operation, thereby improving the user experience.

[0044] Continue to refer to Figure 1-Figure 3 As shown, the air inlet channel 11 includes an introduction section 111 for accommodating a rotation source 41 and a first impeller 42, and a detection section 112 connected to the introduction section 111 and located downstream of the introduction section 111, the electronic nose device also includes a breathable dirt-blocking membrane 5 arranged between the introduction section 111 and the detection section 112, the electronic nose device also includes a partition tube 6 fixedly arranged in the air inlet channel 11 and dividing the detection section 112 into a first sub-segment 1121 and a second sub-segment 1122, the breathable dirt-blocking membrane 5 covers the entrance of the partition tube 6, the detection component 2 is arranged in the first sub-segment 1121, and the second sub-segment 1122 surrounds the first sub-segment 1121 and is not covered by the breathable dirt-blocking membrane 5. When the gas to be tested is sucked into the air inlet channel 11, the gas to be tested is first introduced through the introduction section 111 with the rotating source 41 and then discharged from the air inlet channel 11 through the detection section 112 with the detection component 2. The air-permeable dirt-blocking membrane 5 located between the introduction section 111 and the detection section 112 can allow the gas to be tested to pass through the air-permeable dirt-blocking membrane 5 to filter out some impurities in the gas to be tested, so as to prevent impurities in the gas to be tested (such as dust or particulate matter, etc.) from interfering with the normal operation of the detection component 2, resulting in errors in the detection results, thereby ensuring that the detection component 2 works in a purer environment, thereby improving the accuracy of the detection results of the detection component 2. And because the detection section 112 is divided into a first sub-section 1121 and a second sub-section 1122 by the partition tube 6, impurities (such as dust or particulate matter, etc.) blocked by the breathable dirt-blocking membrane 5 can be discharged from the air inlet channel 11 through the second sub-section 1122 under the action of the power component 4 introduced into the section 111, so as to avoid the accumulation of impurities in the detection section 112, thereby further ensuring the accuracy of the detection results of the detection component 2.

[0045] Specifically, the air-permeable dirt-blocking membrane 5 is a porous film made of polytetrafluoroethylene, which utilizes the property of the porous film to filter some dust particles to achieve the purpose of purification and ventilation, so that the air-permeable dirt-blocking membrane 5 can well filter out impurities in the gas to be tested.

[0046] Furthermore, the electronic nose device also includes a barrier member 7 fixedly arranged in the partition tube 6 and used to form the first sub-segment 1121 into a serpentine channel, so as to provide a longer flow distance for the gas to be detected in the first sub-segment 1121, and the serpentine channel can also arrange more groups of detection components 2 to improve the accuracy of the electronic nose device in detecting the cost to be detected in the gas to be detected. Exemplarily, the barrier member 7 can be a cylindrical spiral blade to cause the first sub-segment 1121 to form a serpentine channel, and the cylindrical bolt blade is more convenient for installation.

[0047] Furthermore, the electronic nose device also includes a semiconductor refrigerator 9 and an electric heater 10 arranged at the bottom of the tube wall of the partition tube 6. The semiconductor refrigerator 9 can keep the liquid in the gas to be tested in a liquid state when the electronic nose device is in a working state to avoid the liquid interfering with the detection structure of the detection component 2, and the electric heater 10 can heat the liquid in the partition tube 6 when the electronic nose device is in a non-working state, so that the liquid can be converted into gas for easy outflow.

[0048] Furthermore, the wind curtain cover 3 includes a cylindrical or conical outer cover body 31, an inner cover body 32 which is arranged in the outer cover body 31 and is cylindrical or conical, and an inner channel 321 formed in the inner cover body 32 and an outer channel 311 formed between the outer cover body 31 and the inner cover body 32, wherein the inner channel 321 has an air inlet 3211 and is connected to the air inlet channel 11, and the outer channel 311 has an air outlet 3111 and is connected to the air outlet channel 12, so that the wind curtain discharged in front of the air outlet 3111 of the wind curtain cover 3 is a hollow cylinder or a hollow cone, so as to achieve the purpose of wrapping the gas to be tested, and the inner cover body 32 and the outer cover body 31 can also form a partition by themselves, thereby improving the wrapping effect of the wind curtain.

[0049] Furthermore, the detection component 2 includes a semiconductor gas sensor, an electrochemical gas sensor, a microstructure gas sensor, and a surface acoustic wave gas sensor to detect the composition and content of the components to be detected in the gas to be detected in the first subsection 1121. The detection component 2 also includes a gas-liquid sensor, a temperature sensor, and a humidity sensor to detect the composition and content of the liquid in the gas to be detected in the first subsection 1121. The electronic nose device also includes a logic control unit electrically connected to the detection component 2 to control each sensor in the detection component 2.

[0050] Specifically, the logic control unit includes a processor (such as a PLC or CPU, etc.), a memory, and electronic components connected to the processor, etc., so as to first control each sensor of the detection component 2. The processor, the memory, and the electronic components are all prior arts well known to those skilled in the art, so they will not be described in detail here.

[0051] Furthermore, the electronic nose device also includes a purification component 8 arranged in the air inlet channel 11 and the air outlet channel 12, wherein the purification component 8 includes activated carbon 81, ultraviolet lamp 82 and photocatalyst coating 83. Among them, the activated carbon 81 can absorb harmful gases in the air, such as volatile organic compounds such as formaldehyde, benzene, xylene, and odor gases such as ammonia and sulfur dioxide, effectively improve the air quality, and reduce the potential harm of harmful gases to human health. The ultraviolet rays in the ultraviolet lamp 82 have a strong bactericidal effect and can destroy the cell walls of bacteria, thereby exerting a bactericidal effect. The photocatalyst coating 83 can decompose viruses in the air. When light is irradiated to the surface of the photocatalyst coating 83, harmful substances will be decomposed into harmless water and carbon dioxide, thereby playing an antibacterial and air purification role.

[0052] In the above description of the present application, unless otherwise clearly specified and limited, the terms "fixed", "installed", "connected" or "connected" and the like should be understood in a broad sense. For example, with regard to the term "connection", it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. Therefore, unless otherwise clearly defined in the present application, those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0053] According to the above description of the present application, those skilled in the art may also understand that the terms used below, such as "upper", "lower", "front", "back", "inside", "outside" and the like, which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of the present application, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the devices or elements involved must have the specific orientation, be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0054] In addition, the terms "first" or "second" used in this application to refer to numbers or ordinals are only used for descriptive purposes and cannot be understood as explicitly or implicitly indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "plurality" is at least two, such as two, three or more, etc., unless otherwise clearly and specifically defined.

[0055] Although multiple embodiments of the present invention have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Those skilled in the art may conceive of many changes, modifications, and alternatives without departing from the thought and spirit of the present invention. It should be understood that in the process of practicing the present invention, various alternatives to the embodiments of the present invention described herein may be adopted. The appended claims are intended to define the scope of protection of the present invention, and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. An electronic nose device, characterized in that: include: A housing, comprising an air inlet channel and an air outlet channel arranged therein, wherein the air outlet channel is arranged at the periphery of the air inlet channel along the circumference of the air inlet channel; A detection component, which is arranged in the air inlet channel of the housing and performs qualitative and quantitative detection on components to be detected in the gas to be detected passing through the air inlet channel; an air curtain cover, which is arranged on the housing and includes an air inlet communicated with the inlet of the air inlet channel, and an air outlet surrounding the air inlet and communicated with the outlet of the air outlet channel; A power assembly, one part of which is arranged in the air outlet channel of the shell, and is used to introduce the air outside the shell into the air outlet channel and discharge it from the air outlet of the wind curtain cover, so as to form a hollow cylindrical or hollow conical wind curtain in front of the air outlet of the wind curtain cover, and another part of the power assembly is arranged in the air inlet channel of the shell, and is used to introduce the gas to be tested in front of the air outlet of the wind curtain cover and wrapped by the wind curtain into the air inlet channel.

2. The electronic nose device according to claim 1, characterized in that: The power assembly includes a rotation source arranged on the central axis of the air inlet channel, a first impeller arranged on the rotation source and located in the air inlet channel, and a second impeller fixedly arranged on the first impeller and located in the air outlet channel, the first impeller being capable of introducing the gas to be measured into the air inlet channel when being rotated by the rotation source, and the second impeller being capable of introducing the air into the air outlet channel when being rotated by the first impeller, wherein the blades of the second impeller and the blades of the first impeller are forward-inclined blades and backward-inclined blades respectively.

3. The electronic nose device according to claim 1, characterized in that: The shell also includes an air induced air channel arranged at the outlet of the air outlet channel, the power assembly includes a rotating source arranged in the air inlet channel, a first impeller arranged on the rotating source and located in the air inlet channel, and an air multiplier arranged on the shell, the first impeller can introduce the gas to be tested into the air inlet channel when being rotated by the rotating source, and the injection hole of the air multiplier is arranged in the air induced air channel or the wind curtain cover and sprays the drawn airflow toward the air outlet, so that the drawn airflow draws the air in the air outlet channel before leaving the air outlet and forms a wind curtain after leaving the air outlet, wherein the blades of the first impeller are backward-inclined blades.

4. The electronic nose device according to claim 2 or 3, characterized in that: The air inlet channel includes an introduction section for accommodating the rotation source and the first impeller, and a detection section connected to the introduction section and located downstream of the introduction section, the electronic nose device also includes a breathable dirt-blocking membrane arranged between the introduction section and the detection section, the electronic nose device also includes a partition cylinder fixedly arranged in the air inlet channel and dividing the detection section into a first sub-section and a second sub-section, the breathable dirt-blocking membrane covers the entrance of the partition cylinder, the detection component is arranged in the first sub-section, and the second sub-section surrounds the first sub-section and is not covered by the breathable dirt-blocking membrane.

5. The electronic nose device according to claim 4, characterized in that: The air permeable dirt-blocking film is a porous film made of polytetrafluoroethylene.

6. The electronic nose device according to claim 4, characterized in that: The electronic nose device further comprises a baffle which is fixed in the partition tube and is used to form the first sub-segment into a serpentine channel.

7. The electronic nose device according to claim 6, characterized in that: The electronic nose device comprises a semiconductor refrigerator and an electric heater which are arranged at the bottom of the partition tube.

8. The electronic nose device according to claim 3, characterized in that: The wind curtain cover includes a cylindrical or conical outer cover body, an inner cover body disposed in the outer cover body and having a cylindrical or conical shape, an inner channel formed in the inner cover body, and an outer channel formed between the outer cover body and the inner cover body, wherein the inner channel has the air inlet and is connected to the air inlet channel, and the outer channel has the air outlet and is connected to the air outlet channel.

9. The electronic nose device according to claim 1, characterized in that: The detection component includes a semiconductor gas sensor, an electrochemical gas sensor, a microstructure gas sensor and / or a surface acoustic wave gas sensor, as well as a gas-liquid sensor, a temperature sensor and / or a humidity sensor. The electronic nose device also includes a logic control unit electrically connected to the detection component.

10. The electronic nose device according to claim 1, characterized in that: The electronic nose device further comprises a purification component arranged in the air inlet channel and / or the air outlet channel, wherein the purification component comprises activated carbon, an ultraviolet lamp and / or a photocatalyst coating.

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