Multi-gas detection module of electrochemical sensor

Abstract

The utility model provides a multi-gas detection module of an electrochemical sensor. The multi-gas detection module comprises a shell, a control circuit board and at least one gas detection module, wherein the control circuit board is fixed in the shell; the at least one gas detection module is fixedly and electrically connected to the control circuit board; a flat cable hole communicated with the interior is formed in the shell, and the flat cable hole is used for connecting an external flat cable into the shell to be electrically connected with the control circuit board; the shell is further provided with at least one air inlet hole communicated with the interior, the number of the air inlet holes corresponds to the number of the gas detection modules, and the detection end of each gas detection module is arranged at the corresponding air inlet hole; a circle of annular groove is formed in the periphery of each of the two air inlet holes in the shell, sealing rings are fixed in the two annular grooves, and the lower surfaces of the sealing rings and the detection end of the gas detection module are fixed to form sealing; due to the action of the sealing ring, gas is difficult to further diffuse to other places to cause corrosion, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of gas sensor technology, and more specifically, to a multi-gas detection module of an electrochemical sensor. Background Technology

[0002] A gas sensor is a device that converts information such as the composition, concentration, or type of a gas into information that can be used by humans, instruments, meters, or computers, essentially giving the device a "sense of smell." Patent document CN201821990540.9 discloses a sensor package. This type of sensor can effectively detect and identify gases. Its use simply requires connecting the pins, i.e., the output pins in the patent, to a circuit board. However, this method of use is quite limited because actual industrial environments are often very complex. For example, the gas being measured may be in a sealed space, such as inside a pipe, and the environment inside the pipe may be very complex, with parameters such as temperature, pressure, and humidity exceeding the application range of the gas sensor. In such cases, the gas sensor may be ineffective. Typically, workers use a pumping method, which involves placing a pump outside the pipe to extract the gas and diffuse it onto the gas sensor for detection. However, the structure of this gas sensor is difficult to integrate well with this pumping method. Furthermore, some gases are corrosive and may corrode the gas sensor and the circuit board itself, limiting the lifespan of the gas sensor. Utility Model Content

[0003] This invention proposes a multi-gas detection module for an electrochemical sensor, aiming to solve at least one of the following technical problems: 1. It can effectively cooperate with the pump suction method to improve detection efficiency; 2. It reduces the probability of corrosion and increases service life.

[0004] This utility model provides a multi-gas detection module for an electrochemical sensor, including a housing, a control circuit board fixed inside the housing, and at least one gas detection module fixedly connected to the control circuit board. The housing has a wiring hole communicating with the interior, which is used to connect an external wiring cable to the housing and electrically connect it to the control circuit board. The housing also has at least one air inlet communicating with the interior, the number of air inlets corresponding to the number of gas detection modules, and the detection end of each gas detection module is located at the corresponding air inlet. An annular groove is formed around the periphery of each of the two air inlets inside the housing, and a sealing ring is fixed in each of the two annular grooves, with the lower surface of the sealing ring fixed to the detection end of the gas detection module to form a seal.

[0005] Compared with the prior art, this application has the following advantages: This application can be electrically connected to external devices via a ribbon cable. Gas can be introduced into the air inlet through an external gas pipe, or the gas can be directly diffused to the area around the air inlet. In this way, the gas will directly react with the detection end of the gas detection module to complete the detection. Due to the effect of the sealing ring and the ribbon cable hole being occupied by the ribbon cable, the gas is difficult to diffuse further to other places and cause corrosion, reducing the probability of corrosion and increasing the service life.

[0006] In one possible implementation, the housing has a cuboid structure, with cable holes on the sidewalls of the housing and air inlets on the upper surface of the housing.

[0007] Compared with existing technologies, the above technical solution can facilitate the connection of cabling and the introduction of gas.

[0008] In one possible implementation, there are two gas detection modules, arranged at intervals along the left and right direction of the control circuit board; there are two air inlets, each located above one of the two gas detection modules; an upwardly arched strip-shaped protrusion is integrally formed on the upper surface of the housing above the two air inlets, extending in the left and right direction; an air chamber is formed inside the strip-shaped protrusion above the two air inlets, and a ventilation channel is also formed inside the strip-shaped protrusion, penetrating both ends in the left and right direction, the ventilation channel connecting the two air chambers in sequence, and an air inlet pipe and an air outlet pipe are connected to both ends of the ventilation channel respectively.

[0009] Compared with existing technologies, the above technical solution can detect a variety of gases. In use, gas is introduced into the inlet pipe, which then enters the ventilation channel and then the gas chamber, and finally enters the inlet hole for detection. After detection, the gas is pumped out through the outlet pipe, which makes it difficult for gas to remain. This can be effectively combined with the pump suction method to improve detection efficiency and further reduce the probability of corrosion and increase service life.

[0010] In one possible implementation, fixing ears are provided on both side walls of the housing in the left-right or front-back directions, and fixing ears are provided with fixing holes that pass through from top to bottom.

[0011] Compared with existing technologies, the above technical solution makes it easier to fix the shell to the external support platform using fasteners.

[0012] In one possible implementation, a cover is detachably connected to the lower end of the housing.

[0013] Compared with existing technologies, the above technical solution facilitates maintenance and assembly.

[0014] In one possible implementation, the four corners of the cover are detachably connected to the lower end of the housing by screws.

[0015] Compared with existing technologies, the above technical solution facilitates maintenance and assembly.

[0016] In one possible implementation, the upper surface of the cover is provided with a cross-shaped reinforcing rib structure.

[0017] Compared with existing technologies, the above technical solution can increase the strength of the cover and extend its service life. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0019] Figure 2 This is a three-dimensional schematic diagram of the disassembled present invention;

[0020] Figure 3 This is a three-dimensional schematic diagram after disassembly in one embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the present invention;

[0022] Figure 5 This is a schematic diagram of the lower surface of the housing of this utility model;

[0023] Figure 6 This is a schematic diagram of the lower surface of the cover of this utility model;

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-Housing, 2-Control circuit board, 3-Gas detection module, 11-Wiring hole, 12-Air inlet, 13-Strip arched part, 14-Fixing ear, 15-Cover, 31-Sealing ring, 121-Annular groove, 131-Air chamber, 132-Ventilation channel, 141-Fixing hole, 151-Reinforcing rib structure, 1321-Air inlet pipe, 1322-Air outlet pipe. Detailed Implementation

[0026] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0027] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0028] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0029] The present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the principle of the gas detection module 3 has been disclosed in the patent document with patent number CN201821990540.9. Its general principle is that the built-in ceramic plate reacts with the gas and transmits the reaction result through an electrical signal. The gas detection module 3 itself belongs to the prior art and is not the focus of this application. For the sake of simplicity, its principle will not be described in detail below.

[0030] See appendix Figure 1 Appendix Figure 3 and appendix Figure 5 This application discloses a multi-gas detection module for an electrochemical sensor, including a housing 1, a control circuit board 2 fixed inside the housing 1, and at least one gas detection module 3 fixedly connected to the control circuit board 2. The housing 1 has a cable routing hole 11 communicating with the interior, which is used to connect an external cable to the housing 1 and connect it to the control circuit board 2. The housing 1 also has at least one air inlet hole 12 communicating with the interior, the number of air inlets 12 corresponding to the number of gas detection modules 3, and the detection end of each gas detection module 3 is located at the corresponding air inlet hole 12. An annular groove 121 is formed around the periphery of each of the two air inlets 12 inside the housing 1, and a sealing ring 31 is fixed in each of the two annular grooves 121, and the lower surface of the sealing ring 31 is fixedly sealed to the detection end of the gas detection module 3. In this embodiment, gas can be introduced into the air inlet 12 through an external pipeline, or the gas can be directly diffused to the air inlet 12. The gas can enter the air inlet 12 and react with the gas detection module 3 to complete the detection. Due to the presence of the sealing ring 31, the gas is not easy to diffuse to other parts. Also, since the cable hole 11 is already connected to the external cable, that is, the cable hole 11 is occupied by the external cable, even if the detection is carried out by gas diffusion, the gas is difficult to enter the interior of the housing 1 and cause corrosion. When in use, the cable hole 11 can be set to face away from the side where the gas diffuses, so that the gas is also less likely to enter the air inlet 11 when it diffuses.

[0031] In some preferred embodiments, the housing 1 has a cuboid structure, with cable routing holes 11 formed on the side wall of the housing 1 and air inlets 12 formed on the upper surface of the housing 1. The cable routing holes 11 are formed on the front side wall of the housing 1, which facilitates the connection of external cables and avoids cable routing interference. The air inlets 12 are formed on the upper surface, which facilitates the introduction of gas and makes it convenient to use.

[0032] As attached Figure 2 and attached Figure 4 As shown, in some preferred embodiments, there are two gas detection modules 3, which are arranged at intervals along the left and right directions of the control circuit board 2; there are two air inlets 12, which are respectively opened above the two gas detection modules 3; the upper surface of the housing 1 has an integrally formed upward arched strip-shaped arched portion 13 above the two air inlets 12, and the strip-shaped arched portion 13 extends in the left and right directions; the inside of the strip-shaped arched portion 13 has an air chamber 131 opened above the two air inlets 12, and the inside of the strip-shaped arched portion 13 also has a ventilation channel 132 that passes through both ends in the left and right directions, the ventilation channel 132 connects the two air chambers 131 in sequence, and the two ends of the ventilation channel 132 are respectively connected to an air inlet pipe 1321 and an air outlet pipe 1322. In this embodiment, the two gas detection modules 3 can detect multiple gases. When in use, an inflation device is connected to the inlet pipe 1321 and an air intake device is connected to the outlet pipe 1322. First, the inflation device is turned on to inject gas, so that the gas enters the ventilation channel 132 and the two air chambers 131 before entering the gas detection module 3 to complete the detection. Then, the air intake device is turned on to extract the gas after the detection is completed, so that the gas is not easy to remain. This makes the gas less likely to cause corrosion and can be effectively combined with the pump suction method to improve the detection efficiency.

[0033] As attached Figure 1 , 2 As shown in Figures 3 or 5, in some preferred embodiments, fixing ears 14 are provided on both side walls of the housing 1 in the left-right or front-back directions, and fixing ears 14 have through fixing holes 141. The fixing ears 14 are integrally formed on both sides of the housing 1 in the left-right direction, and the fixing holes 141 can be screw holes, so that the housing 1 can be fixed to a table or other external support platform by screwing screws into the fixing holes 141.

[0034] In some preferred embodiments, a cover 15 is detachably connected to the lower end of the housing 1. In this embodiment, the cover 15 can be connected to the lower end of the housing 1 by adhesive, snap-fit, or other existing detachable connection methods, which facilitates maintenance and assembly.

[0035] As attached Figure 5As shown, in some preferred embodiments, the four corners of the cover 15 are detachably connected to the lower end of the housing 1 by screws. The four corners of the lower surface of the housing 1 can be integrally formed with threaded holes, so that the four corners of the cover 15 can be detachably connected to the lower end of the housing 1 by screws, which facilitates maintenance and assembly.

[0036] As attached Figure 6 As shown, in some preferred embodiments, a cross-shaped reinforcing rib structure 151 is provided on the upper surface of the cover 15. The reinforcing rib structure 151 protrudes from the upper surface of the cover 15 and is integrally formed in the middle of the upper surface of the cover 15, which can increase the strength of the cover 15 and increase its service life.

[0037] In the description of the embodiments of this application, it should be noted that the terms "inner" and "outer" and other terms indicating direction or positional relationship are based on the direction or positional relationship shown in the drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this application.

[0038] In the description of this application, the references to terms such as "an embodiment," "some embodiments," "in this embodiment," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0039] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-gas detection module for an electrochemical sensor, characterized in that, The device includes a housing (1), a control circuit board (2) fixed inside the housing (1), and at least one gas detection module (3) fixedly connected to the control circuit board (2). The housing (1) has a cable hole (11) communicating with the interior, which is used to connect an external cable to the housing (1) and connect it to the control circuit board (2). The housing (1) also has at least one air inlet (12) communicating with the interior. The number of air inlets (12) corresponds to the number of gas detection modules (3), and the detection end of each gas detection module (3) is located at the corresponding air inlet (12). An annular groove (121) is formed around the air inlet (12) inside the housing (1). A sealing ring (31) is fixed in the annular groove (121), and the lower end of the sealing ring (31) is fixed to the detection end of the gas detection module (3) to form a seal.

2. The multi-gas detection module of the electrochemical sensor according to claim 1, characterized in that, The housing (1) has a cuboid structure, the cable hole (11) is opened on the side wall of the housing (1), and the air inlet (12) is opened on the upper surface of the housing (1).

3. The multi-gas detection module of the electrochemical sensor according to claim 2, characterized in that, There are two gas detection modules (3), which are arranged at intervals along the left and right directions of the control circuit board (2); there are two air inlets (12), which are respectively opened on the upper surface of the housing (1) above the two gas detection modules (3); the upper surface of the housing (1) is integrally formed with an upward arched strip-shaped arch (13) above the two air inlets (12), and the strip-shaped arch (13) extends in the left and right directions; the inside of the strip-shaped arch (13) is provided with air chambers (131) above the two air inlets (12), and the inside of the strip-shaped arch (13) is also provided with ventilation channels (132) that pass through both ends in the left and right directions, the ventilation channels (132) are connected to the two air chambers (131) in sequence, and the two ends of the ventilation channels (132) are respectively connected to an air inlet pipe (1321) and an air outlet pipe (1322).

4. The multi-gas detection module of the electrochemical sensor according to claim 1, 2 or 3, characterized in that, The housing (1) has two side walls extending from the left and right or front and back directions, each with a fixing ear (14) and a fixing hole (141) extending through from top to bottom.

5. The multi-gas detection module of the electrochemical sensor according to claim 1, 2 or 3, characterized in that, The lower end of the housing (1) is detachably connected to a cover (15).

6. The multi-gas detection module of the electrochemical sensor according to claim 5, characterized in that, The cover (15) is detachably connected to the lower end of the housing (1) by screws at the four corners.

7. The multi-gas detection module of the electrochemical sensor according to claim 6, characterized in that, The upper surface of the cover (15) is provided with a cross-shaped reinforcing rib structure (151).

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