Carbon dioxide gas detection device

Abstract

The utility model discloses a carbon dioxide gas detection device which comprises a shell, a mounting plate, a circuit board and a light transmission assembly, the mounting plate, the circuit board and the light transmission assembly are sequentially arranged in the shell from top to bottom, a first air inlet is formed in the mounting plate, and a second air inlet is formed in the circuit board. A gas channel is arranged between the mounting plate and the circuit board, and the gas channel is communicated with the first gas inlet hole and the second gas inlet hole; a light-emitting assembly is connected to the position, located at the second air inlet hole, of the circuit board, a light channel is connected to the position, located at the light-emitting assembly, of the circuit board, and a light intensity detection assembly is connected to the end, opposite to the second air inlet hole, of the circuit board; the light transmission assembly comprises a first reflection device and a second reflection device, the first reflection device is arranged below the light emitting assembly, and the second reflection device is arranged below the light intensity detection assembly.

Description

TECHNICAL FIELD

[0001] The utility model belongs to environmental detection technical field, especially relate to a carbon dioxide gas detection device. BACKGROUND

[0002] In the field of modern environmental science, with the rapid advancement of global industrialization and urbanization and the continuous evolution of energy consumption patterns, monitoring and analyzing atmospheric composition has become a key task for assessing environmental quality and climate change trends, and the detection of carbon dioxide concentration in the air is at the core.

[0003] In the process of environmental detection, indoor and outdoor carbon dioxide detection will be involved. Traditional carbon dioxide detection covers various means such as chemical analysis and physical detection. Chemical analysis methods such as titration based on barium hydroxide solution absorption of carbon dioxide have high accuracy, but are complex to operate, time-consuming and require professional chemical experiment skills and equipment, making it difficult to achieve large-scale, real-time environmental monitoring. Non-dispersive infrared (NDIR) detection technology in physical detection utilizes the absorption characteristics of carbon dioxide on specific infrared bands, has fast response speed and high sensitivity, and is one of the commonly used detection methods, but the instrument cost is high and is easily affected by environmental humidity, other gas interference and other factors.

[0004] In recent years, with the rapid development of sensor technology, new carbon dioxide sensors based on conductor materials have emerged. However, there is still a problem of large size of the entire sensor device, which is extremely disadvantageous for environmental detection operations. UTILITY MODEL CONTENTS

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a carbon dioxide gas detection device to solve the problem of large size of the existing carbon dioxide gas detection device used in environmental detection.

[0006] A carbon dioxide gas detection device, comprising a housing and a mounting plate, a circuit board and a light transmission assembly arranged in the housing from top to bottom, a first air inlet hole is provided on the mounting plate, a second air inlet hole is provided on the circuit board, a gas channel is provided between the mounting plate and the circuit board, the gas channel communicates the first air inlet hole and the second air inlet hole;

[0007] A light emitting assembly is connected to the circuit board at the position of the second air inlet hole, a light channel is connected to the circuit board at the position of the light emitting assembly, and a light intensity detection assembly is connected to one end of the circuit board opposite to the second air inlet hole;

[0008] The light transmission component includes a first reflective device and a second reflective device, wherein the first reflective device is disposed below the light-emitting component and the second reflective device is disposed below the light intensity detection component.

[0009] Preferably, both the first reflective device and the second reflective device include a base with an inclined surface, and a metal layer is disposed on the inclined surface of the base.

[0010] Preferably, the light transmission assembly further includes a mounting groove, wherein the first reflective device and the second reflective device are disposed in the mounting groove and are respectively located at both ends of the mounting groove.

[0011] Preferably, the top and sides of the housing are provided with multiple air inlets.

[0012] Preferably, the housing includes an upper housing and a lower housing, the upper housing is provided with a connection port, the lower housing is snapped into the connection port, a fixing plate is connected to one end of the upper housing and the lower housing, and a display panel is connected to the other end of the upper housing and the lower housing.

[0013] Preferably, the circuit board is provided with a power supply component, and the fixing plate is provided with a charging port, which corresponds to the power supply component.

[0014] Preferably, two first protrusions are formed on the housing, and a first mounting groove is formed between the two first protrusions, and the mounting plate is connected to the first mounting groove.

[0015] Preferably, two second protrusions are formed on the housing, and a second mounting groove is formed between the two second protrusions, and the circuit board is connected to the second mounting groove.

[0016] Preferably, the upper housing and the lower housing are provided with holes, and the fixing plate is connected to the holes by connecting screws.

[0017] Preferably, the upper housing is provided with a connection hole, and the display panel is connected to the upper housing through the connection hole.

[0018] Compared with existing technologies, this utility model provides a carbon dioxide gas detection device in which carbon dioxide gas enters the housing and sequentially passes through a first air inlet, a gas channel, a second air inlet, another gas channel, and a light channel. A light intensity detection component is installed on the circuit board. After detecting light intensity signals of different intensities, the circuit board can calculate the corresponding carbon dioxide concentration based on the light intensity signal. The entire device integrates the light-emitting component and the light intensity detection component on the circuit board. Based on the positions of the light-emitting component and the light intensity detection component, the gas entry and light transmission are configured, resulting in a smaller overall size of the carbon dioxide gas detection device. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0020] Figure 1 This is an assembly drawing of the carbon dioxide gas detection device provided in this embodiment of the utility model;

[0021] Figure 2 This is an assembly drawing of the carbon dioxide gas detection device provided in this embodiment of the utility model;

[0022] Figure 3 This is an exploded view of the carbon dioxide gas detection device provided in this embodiment of the utility model;

[0023] Figure 4 This is an exploded view of the carbon dioxide gas detection device provided in this embodiment of the utility model;

[0024] Figure 5 This is a schematic diagram showing the connection between the upper and lower housings provided in this embodiment of the utility model;

[0025] Figure 6 This is a schematic diagram of the circuit board structure provided in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the circuit board structure provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the optical circuit in the carbon dioxide gas detection device provided in this embodiment of the utility model. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "longitudinal," and "lateral" are used interchangeably.

[0030] The terms "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "top surface," "bottom surface," "inner," "outer," "inner side," and "outer side" are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If the terms "first," "second," and "third" are used in the description, they are for descriptive purposes and to distinguish technical features, and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the sequential relationship of the indicated technical features.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. The embodiments of this utility model will now be described based on its overall structure.

[0033] Figure 1 and Figure 2 This is an assembly drawing of the carbon dioxide gas detection device provided in this embodiment of the utility model. Figure 3 This is an exploded view of the carbon dioxide gas detection device provided in this embodiment of the utility model. Figure 6 and Figure 7 This is a schematic diagram of the circuit board structure provided in an embodiment of the present invention. (See attached diagram.) Figure 1 , Figure 2 , Figure 3 , Figure 6 and Figure 7 The carbon dioxide gas detection device includes a housing 1 and, from top to bottom, a mounting plate 2, a circuit board 3, and a light transmission component 4 arranged in the housing 1. The mounting plate 2 is provided with a first air inlet 21, and the circuit board 3 is provided with a second air inlet 31.

[0034] A gas channel 8 is provided between the mounting plate 2 and the circuit board 3, and the gas channel 8 connects the first air inlet 21 and the second air inlet 31; a light-emitting component 32 is connected to the circuit board 3 at the position of the second air inlet 31, a light channel 34 is connected to the circuit board 3 at the position of the light-emitting component 32, and a light intensity detection component 33 is connected to the end of the circuit board 3 opposite to the second air inlet 31.

[0035] The light transmission component 4 includes a first reflective device 41 and a second reflective device 42. The first reflective device 41 is disposed below the light-emitting component 32, and the second reflective device 42 is disposed below the light intensity detection component 33.

[0036] The carbon dioxide gas detection device provided in the above embodiment has a light-emitting component 32 mounted on the circuit board 3 that emits light. The light passes through the light channel 34 and enters the light transmission component 4. After being reflected by the first reflector 41 and the second reflector 42, the light is transmitted to the light intensity detection component 33, which can detect the intensity of the light. After entering the housing 1, the carbon dioxide gas passes sequentially through the first air inlet 21, the gas channel 8, the second air inlet 31, the gas channel 8, and the light channel 34.

[0037] In optical detection technology, the absorption characteristics of carbon dioxide in specific infrared bands are utilized. Different concentrations of carbon dioxide in the air result in different light transmittance. Light transmittance is a parameter characterizing a medium's ability to conduct light. High light transmittance means a strong ability to transmit light, resulting in relatively high intensity light emitted after passing through the medium under the same incident light conditions. Conversely, low light transmittance indicates weak light transmission, leading to more light absorption and scattering, and thus relatively lower intensity emitted light. Therefore, when carbon dioxide passes through the light emitted by the light-emitting component 32, the intensity of the light is detected at the light intensity detection component 33. Under the same incident light conditions, different carbon dioxide concentrations result in different light intensities emitted after passing through the carbon dioxide. A chip on the circuit board 3 calculates the corresponding carbon dioxide concentration based on the light intensity signal detected by the light intensity detection component 33.

[0038] In this invention, a light intensity detection component 33 is provided on the circuit board 3. After the light intensity detection component 33 detects light intensity signals of different intensities, the circuit board 3 can calculate the corresponding carbon dioxide concentration based on the light intensity signal. The entire device integrates the light-emitting component 32 and the light intensity detection component 33 on the circuit board 3. Based on the positions of the light-emitting component 32 and the light intensity detection component 33, the entry of gas and the transmission of light are set, thereby reducing the size of the entire carbon dioxide gas detection device.

[0039] Figure 8This is a schematic diagram of the optical circuit in the carbon dioxide gas detection device provided in this embodiment of the utility model. (See attached diagram.) Figure 3 and Figure 8 In a preferred embodiment, both the first reflective device 41 and the second reflective device 42 include a base with an inclined surface, and a metal layer is disposed on the inclined surface of the base. Specifically, a silver metal layer is disposed on the inclined surface of the base; silver is an excellent light-reflecting material. It has a high reflectivity in the visible light range, reflecting approximately 95% of visible light.

[0040] See Figure 8 In this process, after the light-emitting component 32 emits light, it enters the inclined surface of the first reflective device 41. The inclined surface serves as the reflective surface of the light. After the incident light is reflected by the first reflective device 41, it enters the second reflective device 42. After being reflected by the second reflective device 42, it enters the light intensity detection component 33. The light intensity detection component 33 receives and detects the intensity of the light.

[0041] See Figure 3 In a preferred embodiment, the light transmission component 4 further includes a mounting groove 43, in which the first reflective device 41 and the second reflective device 42 are disposed. According to the transmission of light, the first reflective device 41 and the second reflective device 42 are respectively located at both ends of the mounting groove 43. The mounting groove 43 can further form a light channel.

[0042] See Figure 2 In a preferred embodiment, the top and sides of the housing 1 are provided with multiple air inlets 11. The presence of air inlets 11 on the sides and top allows carbon dioxide gas to quickly enter the housing 1.

[0043] Figure 5 This is a schematic diagram showing the connection between the upper and lower housings according to an embodiment of the present invention. (See attached diagram.) Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, the housing 1 includes an upper housing 12 and a lower housing 13. The upper housing 12 is provided with a connection port 121, and the lower housing 13 is snapped into the connection port 121. A fixing plate 5 is connected to one end of the upper housing 12 and the lower housing 13, and a display panel 6 is connected to the other end of the upper housing 12 and the lower housing 13.

[0044] See Figure 2 and Figure 5The top and side air inlets 11 are located on the upper housing 12, with the side air inlets 11 positioned on the upper housing 12 corresponding to the gas space formed by the mounting plate 2 and the upper housing 12. Gas enters the housing 1 through the air inlet 11, then enters the gas channel 8 through the first air inlet 21, and subsequently enters the optical channel 34 through the second air inlet 31. After entering the housing 1, the gas first enters the gas space formed by the mounting plate 2 and the upper housing 12. At this location, carbon dioxide can be dried as needed, allowing the device to flexibly adapt to different detection conditions.

[0045] See Figure 1 and Figure 6 In a preferred embodiment, a power supply component 35 is provided on the circuit board 3, and a charging port 51 is provided on the fixing plate 5, the charging port 51 corresponding to the power supply component 35.

[0046] This invention enables the power supply component 35 to be charged via the charging port 51, allowing the power supply component 35 to provide power to the circuit board 3 and the light-emitting component 32 and light intensity detection component 33 on the circuit board 3. Once charged, the device can be easily carried to testing environments, thus enhancing its flexibility.

[0047] See Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, two first protrusions 14 are formed on the housing 1, and a first mounting groove 141 is formed between the two first protrusions 14, and the mounting plate 2 is connected to the first mounting groove 141.

[0048] See Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, two second protrusions 15 are formed on the housing 1, and a second mounting groove 151 is formed between the two second protrusions 15, and the circuit board 3 is connected to the second mounting groove 151.

[0049] See Figure 3 , Figure 4 and Figure 5 In a preferred embodiment, the upper housing 12 and the lower housing 13 are provided with holes 16, and the fixing plate 5 is connected to the holes 16 by connecting screws 7.

[0050] See Figure 3 , Figure 4 and Figure 5In a preferred embodiment, the upper housing 12 is provided with a connection hole 121, and the display panel 6 is connected to the upper housing 12 through the connection hole 122. The display panel 6 is a touch-screen display panel, and it is provided with a touch-screen switch for starting and stopping the device; the switch is connected to the circuit board 3. The display panel 6 displays the carbon dioxide detection result.

[0051] In summary, the carbon dioxide gas detection device of this utility model is small in size and highly flexible, and can adapt to environmental detection conditions.

[0052] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A carbon dioxide gas detecting device characterized by comprising: The shell comprises a shell body, a mounting plate, a circuit board and a light transmission assembly arranged in the shell body from top to bottom, the mounting plate is provided with a first air inlet, the circuit board is provided with a second air inlet, a gas passage is arranged between the mounting plate and the circuit board, and the gas passage is communicated with the first air inlet and the second air inlet; The circuit board is connected with a light emitting assembly at the position of the second air inlet, the circuit board is connected with a light passage at the position of the light emitting assembly, and the circuit board is connected with a light intensity detection assembly at the position opposite to the second air inlet; The light transmission assembly comprises a first reflecting device and a second reflecting device, the first reflecting device is arranged below the light emitting assembly, and the second reflecting device is arranged below the light intensity detection assembly.

2. The carbon dioxide gas detection device according to claim 1, wherein The first reflecting device and the second reflecting device each comprise a base with an inclined surface, and the inclined surface of the base is provided with a metal layer.

3. The carbon dioxide gas detection device according to claim 1, wherein The light transmission assembly further comprises a mounting groove, and the first reflecting device and the second reflecting device are arranged in the mounting groove and located at two ends of the mounting groove respectively.

4. The carbon dioxide gas detection device according to claim 1, wherein The top and side of the shell body are provided with a plurality of air inlets.

5. The carbon dioxide gas detection device according to claim 1, wherein The shell comprises an upper shell body and a lower shell body, the upper shell body is provided with a connecting port, the lower shell body is clamped in the connecting port, one end of the upper shell body and the lower shell body is connected with a fixing plate, and the other end of the upper shell body and the lower shell body is connected with a display plate.

6. The carbon dioxide gas detection device according to claim 5, wherein The circuit board is provided with a power supply assembly, the fixing plate is provided with a charging port corresponding to the power supply assembly.

7. The carbon dioxide gas detection device according to claim 1, wherein Two first protrusions are formed on the shell body, a first mounting groove is formed between the two first protrusions, and the mounting plate is connected into the first mounting groove.

8. The carbon dioxide gas detection device according to claim 1, wherein Two second protrusions are formed on the shell body, a second mounting groove is formed between the two second protrusions, and the circuit board is connected into the second mounting groove.

9. The carbon dioxide gas detection device according to claim 5, wherein The upper shell body and the lower shell body are provided with a hole position, and the fixing plate is connected to the hole position through a connecting screw.

10. The carbon dioxide gas detection device according to claim 5, wherein The upper shell body is provided with a connecting hole, and the display plate is connected to the upper shell body through the connecting hole.

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