CN219810843U

CN219810843U - Gas detection device

Info

Publication number: CN219810843U
Application number: CN202321136113.5U
Authority: CN
Inventors: 丁伊央; 吴树帜; 范会林
Original assignee: Shenzhen Huitou Intelligent Control Technology Co ltd
Current assignee: Shenzhen Huitou Intelligent Control Technology Co ltd
Priority date: 2023-05-11
Filing date: 2023-05-11
Publication date: 2023-10-10
Anticipated expiration: 2033-05-11

Abstract

The utility model relates to a gas detection device, which comprises a shell and a detection module. A cavity and a containing groove positioned in the cavity are formed in the shell, an air inlet communicated with the cavity is formed in the shell, the air inlet is used for allowing gas to be tested to enter the cavity, and the containing groove is used for collecting foreign matters entering from the air inlet; the detection module is arranged in the shell and is positioned outside the accommodating groove, and the detection module is used for detecting the concentration of the gas to be detected. The air inlet hole can be used for allowing outside gas to be detected to enter the shell, and the detection module in the shell can be used for detecting the concentration of the gas to be detected. The inlet port of traditional gas detection device easily advances dirt, and the dust can produce the influence to detection module's detection precision. In the gas detection device, the accommodating groove is additionally formed in the shell, and the accommodating groove can collect foreign matters (such as dust and the like) entering the shell from the air inlet hole, so that the detection accuracy is prevented from being influenced by the foreign matters entering the shell.

Description

Gas detection device

Technical Field

The utility model relates to the technical field of gas detection, in particular to a gas detection device.

Background

In an environment where the environment is relatively closed, for example, if ventilation is not performed for a long time in a vehicle, the carbon dioxide content in the vehicle gradually increases, so that a driver is easy to get trapped and tired, and the tired driving threatens the safety of personnel in the vehicle. Thus, a conventional in-vehicle gas detection device has emerged, which can monitor the concentration of carbon dioxide in a vehicle.

However, the conventional gas detection apparatus has a problem in that the detection accuracy is not high or gradually decreases during long-term use.

The above information disclosed in the background of the utility model is only for the understanding of the background of the utility model and may contain information that does not form the prior art.

Disclosure of Invention

In view of the above, it is necessary to provide a gas detection device.

A gas detection device, comprising:

the device comprises a shell, wherein a cavity and a containing groove positioned in the cavity are formed in the shell, an air inlet communicated with the cavity is formed in the shell, the air inlet is used for allowing gas to be tested to enter the cavity, and the containing groove is used for collecting foreign matters entering from the air inlet; a kind of electronic device with high-pressure air-conditioning system

The detection module is arranged in the shell and is positioned outside the accommodating groove, and the detection module is used for detecting the concentration of the gas to be detected.

According to the gas detection device, the air inlet hole can be used for allowing outside gas to be detected to enter the shell, and the detection module in the shell can be used for detecting the concentration of the gas to be detected. For example, the gas detection device can be installed in a vehicle, the gas to be detected in the vehicle can enter the shell from the gas inlet, the detection module can detect the concentration of the indexes such as carbon dioxide of the gas to be detected, and the indexes such as carbon dioxide of the gas in the vehicle can be monitored, so that the situation that a driver is easy to drive and fatigue due to overhigh carbon dioxide concentration in the vehicle is avoided. The inlet port of traditional gas detection device easily advances dirt, and the dust can produce the influence to detection module's detection precision. In the gas detection device, the accommodating groove is additionally formed in the shell, and the accommodating groove can collect foreign matters (such as dust and the like) entering the shell from the air inlet hole, so that the detection accuracy is prevented from being influenced by the foreign matters entering the shell.

In one embodiment, the air inlet is formed in the top of the shell, and a projection of the air inlet in the height direction of the shell is located in the accommodating groove. The foreign matters such as dust, drop of water and the like entering the shell from the air inlet hole can fall into the accommodating groove below under the action of gravity, namely the accommodating groove collects the foreign matters, so that the foreign matters are prevented from affecting the detection module.

In one embodiment, the device further comprises a partition plate arranged in the shell, the partition plate separates the cavity to form the accommodating groove and the fixing groove, and the detection module is arranged in the fixing groove. The baffle separates the foreign matter in the holding tank and the detection module in the fixed slot, and the baffle can block the propagation of foreign matter, avoids it to cause the influence to detection module.

In one embodiment, the housing includes an upper shell and a lower shell detachably connected with the upper shell, the lower shell and the upper shell enclose to form the cavity, the lower shell is internally provided with the accommodating groove and the fixing groove, and the upper shell is provided with the air inlet hole. The upper shell is detachably connected with the lower shell, so that the shell and the detection module are convenient to assemble, and later maintenance is also convenient, for example, the upper shell and the lower shell can be opened to clean or replace the detection module in the upper shell and the lower shell.

In one embodiment, the baffle is integrally formed with the housing.

In one embodiment, the detection module includes an adapter plate and a sensor connected to the adapter plate, where the sensor is used to detect the concentration of the gas to be detected. The adapter plate can be connected with an external power supply to supply power.

In one embodiment, the sensor comprises a detection component and a housing, wherein an air vent is formed in the housing, an optical air chamber is formed in the housing, the optical air chamber is communicated with a cavity of the housing through the air vent, the air vent is used for allowing the gas to be detected to enter the optical air chamber from the cavity, the detection component is arranged in the optical air chamber, and the detection component is used for detecting the concentration of the gas to be detected in the optical air chamber.

In one embodiment, the detection assembly includes a detector and a light source disposed in the optical gas chamber, the light source is configured to emit a light beam into the optical gas chamber, and the detector is configured to receive the light beam to obtain the concentration of the gas to be detected. The light source may emit a light beam with a portion of the specific wavelength, for example, the light source may emit infrared light through the gas to be measured in the optical gas chamber, the gas to be measured may absorb a portion of the infrared light, and the remaining portion of the infrared light may be reflected in the optical gas chamber and then received by the detector, where the detector may determine the intensity of the infrared light received by the detector. According to the principle that the absorbance is in direct proportion to the concentration of light absorbing substances and the thickness of an absorption layer in a non-dispersive infrared principle (NDIR), when the concentration of the gas to be detected in the environment is different, the intensity of infrared light detected by a detector is also different, and the obtained voltage value converted and output by the absorbed infrared light is correspondingly changed, so that the light intensity value which can be displayed and read can be obtained by converting the voltage value, and the concentration of the gas to be detected is obtained.

In one embodiment, the surface of the optical cell is provided with a coating for reflecting the light beam. The coating can make the inner surface of the optical chamber have better reflection effect on the light beam emitted by the light source,

in one embodiment, the sensor further comprises a waterproof and breathable membrane, and the waterproof and breathable membrane covers the ventilation holes. Because the outside gas that awaits measuring that gets into in the casing probably carries certain moisture, in order to prevent that the hydrone in the gas that awaits measuring from causing the influence to the testing result, so add waterproof ventilated membrane, it can let the gas moisture in the air pass through and screen out the hydrone, ensures the detection accuracy of indexes such as carbon dioxide in the gas that awaits measuring follow-up.

In one embodiment, the adapter plate comprises a substrate and an adapter connected with the substrate, the substrate is connected with the sensor, and the adapter penetrates through the shell. I.e. the adapter extends from within the housing to connect with an external power source for supplying power.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments or the conventional techniques of the present utility model, the drawings required for the descriptions of the embodiments or the conventional techniques will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

Fig. 1 is a schematic structural diagram of a gas detection device according to an embodiment of the present utility model.

Fig. 2 is a schematic view of an embodiment of the present utility model when the upper case is separated from the lower case.

Fig. 3 is an exploded view of a gas detection device according to another embodiment of the present utility model.

Fig. 4 is a cross-sectional view of a gas detection apparatus according to an embodiment of the present utility model.

Reference numerals:

10. a gas detection device; 100. a housing; 110. an upper case; 111. an air inlet hole; 120. a lower case; 121. a partition plate; 140. a receiving groove; 150. a fixing groove; 200. a detection module; 210. an adapter plate; 211. a substrate; 212. an adapter; 220. a sensor; 221. a detection assembly; 2211. a detector; 2212. a light source; 222. a housing; 2222. an air vent; 223. an optical air chamber; 224. waterproof breathable films.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

Referring to fig. 1 to 4, in some embodiments, a gas detection apparatus 10 is provided and includes a housing 100 and a detection module 200. As shown in fig. 3 and fig. 4, a cavity and a receiving groove 140 located in the cavity are formed in the housing 100, an air inlet 111 is formed on the housing 100 and is communicated with the cavity, the air inlet 111 is used for allowing the air to be tested to enter the cavity, and the receiving groove 140 is used for collecting the foreign matters entering from the air inlet 111. As shown in fig. 2 and 4, the detection module 200 is disposed in the housing 100 and outside the accommodating groove 140, and the detection module 200 is used for detecting the concentration of the gas to be detected.

In the above-mentioned gas detection device 10, the air inlet 111 can allow the external gas to be detected to enter the housing 100, and the detection module 200 in the housing 100 can detect the concentration of the gas to be detected. For example, the gas detection device 10 may be installed in a vehicle, and the gas to be detected in the vehicle may enter the housing 100 from the gas inlet 111, and the detection module 200 may detect the concentration of the index such as carbon dioxide of the gas to be detected, that is, may monitor the index such as carbon dioxide of the gas in the vehicle, so as to be beneficial to avoiding the situation that the driver is easy to drive and fatigue due to the too high concentration of carbon dioxide in the vehicle. The inlet port of traditional gas detection device easily advances dirt, and the dust can produce the influence to detection module's detection precision. In the gas detection device 10 of the present utility model, the housing 100 is provided with the accommodating groove 140, and the accommodating groove 140 can collect the foreign matters (such as dust, etc.) entering the housing 100 from the air inlet hole 111, so as to prevent the detection module 200 from being affected by the foreign matters entering the housing 100.

Specifically, as shown in fig. 2 and 3, in one embodiment, the housing 100 includes an upper shell 110 and a lower shell 120 detachably connected to the upper shell 110, the upper shell 110 is provided with the air inlet hole 111, and the lower shell 120 and the upper shell 110 enclose the cavity. The detachable connection manner of the upper case 110 and the lower case 120 may include threaded connection, clamping connection, etc., so that the assembly of the case 100 and the detection module 200 is facilitated, and the later maintenance is also facilitated, for example, the upper case 110 and the lower case 120 may be opened to clean or replace the detection module 200 therein.

More specifically, as shown in fig. 4, in one embodiment, the air intake hole 111 is opened at the top of the upper case 110, and a projection of the air intake hole 111 in the height direction of the case 100 is located in the receiving groove 140. The foreign matters such as dust and water drops entering the housing 100 from the air inlet 111 can fall into the accommodating groove 140 under the gravity, i.e. the accommodating groove 140 collects the foreign matters, thereby preventing the foreign matters from affecting the detection module 200.

More specifically, as shown in fig. 3 and 4, in one embodiment, the gas detection device 10 further includes a partition 121 disposed in the housing 100, the partition 121 partitions the cavity to form the accommodating groove 140 and the fixing groove 150, and the detection module 200 is disposed in the fixing groove 150. For example, in the embodiment shown in fig. 3 and 4, the partition 121 may be integrally formed with the lower case 120 body 100 and partition the inner space of the lower case 120 body 100 into the receiving groove 140 and the fixing groove 150. The partition 121 separates the foreign matter in the receiving groove 140 from the detection module 200 in the fixing groove 150, and the partition 121 can block the propagation of the foreign matter to prevent the foreign matter from affecting the detection module 200.

Referring to fig. 2, in one embodiment, the detection module 200 includes an adapter plate 210 and a sensor 220 connected to the adapter plate 210, where the sensor 220 is used for detecting the concentration of the gas to be detected. The adapter plate 210 includes a substrate 211 and an adapter 212 connected to the substrate 211, the substrate 211 is connected to the sensor 220, and the adapter 212 is disposed through the housing 100. The adapter 212 communicates with the outside through the adapter hole, i.e., the adapter 212 protrudes from the inside of the housing 100 to be connected to an external power source for supplying power.

Specifically, as shown in fig. 3, in one embodiment, the sensor 220 includes a detection component 221 and a housing 222, an air vent 2222 is formed on the housing 222, an optical air chamber 223 is formed in the housing 222, the optical air chamber 223 is communicated with a cavity of the housing 100 through the air vent 2222, the air vent 2222 is used for allowing the gas to be detected to enter the optical air chamber 223 from the cavity, the detection component 221 is disposed in the optical air chamber 223, and the detection component 221 is used for detecting the concentration of the gas to be detected in the optical air chamber 223.

More specifically, as shown in fig. 3, in one embodiment, the detection assembly 221 includes a detector 2211 disposed in the optical gas chamber 223, and a light source 2212, where the light source 2212 is configured to emit a light beam into the optical gas chamber 223, and the detector 2211 is configured to receive the light beam to obtain the concentration of the gas to be measured. The light source 2212 may emit a light beam with a part of a specific wavelength, for example, the light source 2212 may emit infrared light through the gas to be measured in the optical gas chamber 223, the gas to be measured may absorb a part of the infrared light, and the remaining part of the infrared light may be received by the detector 2211 after being reflected in the optical gas chamber 223, and the detector 2211 may measure the intensity of the infrared light received by the detector. According to the principle that the absorbance is proportional to the concentration of the light absorbing substance and the thickness of the absorbing layer in the non-dispersive infrared principle (NDIR), when the concentration of the gas to be measured in the environment is different, the infrared light intensity detected by the detector 2211 is also different, and the obtained voltage value converted and output by the absorbed infrared light also changes correspondingly, so that the light intensity value which can be displayed and read can be obtained by converting the voltage value, and the concentration of the gas to be measured is obtained.

In one embodiment, the surface of the optical cell 223 may also be coated with a coating for reflecting the light beam. The plating layer may plate the metal having the light reflecting property to the surface of the optical cell 223 by plating, sputtering, etc., such as silver plating, aluminum plating, chromium plating, etc. The coating may provide the inner surface of the optical plenum 223 with a better reflection of the light beam emitted by the light source 2212,

referring to fig. 2 and 3, in one embodiment, the sensor 220 further includes a waterproof and breathable membrane 224, and the waterproof and breathable membrane 224 covers the ventilation hole 2222. Because the outside air to be measured that gets into in the casing 100 can carry certain moisture, in order to prevent that the hydrone in the air to be measured from causing the influence to the testing result, so add waterproof ventilated membrane 224, it can let the gaseous moisture in the air pass through and screen out the hydrone, ensures the detection accuracy of indexes such as carbon dioxide in the follow-up air to be measured.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

In the description of the present utility model, it should be understood that the terms "axial," "radial," "circumferential," "length," "width," "thickness," "center," "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," etc. indicate or are based on the orientation or positional relationship shown in the drawings, merely for convenience of description and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood that when an element is referred to as being "disposed," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the description of the present specification, the descriptions of the terms "one embodiment," "other implementation," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model.

Claims

1. A gas detection apparatus, comprising:

2. The gas detecting apparatus according to claim 1, wherein the gas inlet hole is opened at the top of the housing, and a projection of the gas inlet hole in a height direction of the housing is located in the accommodation groove.

3. The gas detection device of claim 1, further comprising a partition disposed within the housing, the partition separating the cavity to form the receiving slot and a retaining slot, the detection module disposed within the retaining slot.

4. The gas detection device according to claim 3, wherein the housing includes an upper case and a lower case detachably connected to the upper case, the lower case and the upper case enclose to form the cavity, the lower case is formed with the accommodation groove and the fixing groove therein, and the upper case is provided with the gas intake hole;

and/or, the partition plate and the shell are integrally formed.

5. The gas detection apparatus according to claim 1, wherein the detection module includes an adapter plate and a sensor connected to the adapter plate, the sensor being configured to detect a concentration of the gas to be detected.

6. The gas detection device according to claim 5, wherein the sensor comprises a detection assembly and a housing, a vent hole is formed in the housing, an optical air chamber is formed in the housing, the optical air chamber is communicated with a cavity of the housing through the vent hole, the vent hole is used for allowing the gas to be detected to enter the optical air chamber from the cavity, the detection assembly is arranged in the optical air chamber, and the detection assembly is used for detecting the concentration of the gas to be detected in the optical air chamber.

7. The gas detection apparatus according to claim 6, wherein the detection assembly comprises a detector and a light source disposed within the optical gas chamber, the light source being configured to emit a light beam into the optical gas chamber, the detector being configured to receive the light beam to obtain the concentration of the gas to be detected.

8. The gas detection apparatus according to claim 7, wherein a surface of the optical gas cell is provided with a plating layer for reflecting the light beam.

9. The gas detection device of claim 6, wherein the sensor further comprises a waterproof and breathable membrane covering the ventilation aperture.

10. The gas detection device of claim 5, wherein the adapter plate comprises a base plate and an adapter connected with the base plate, the base plate is connected with the sensor, and the adapter penetrates through the shell.