Gas sensor gas chamber and gas sensor assembly

Abstract

The utility model discloses a gas sensor gas chamber and a gas sensor assembly, and belongs to the technical field of gas sensing. The multiple placement grooves are formed in the gas chamber cover at intervals, each placement groove comprises a first groove chamber and a second groove chamber, the first groove chambers are used for allowing the gas sensors to be inserted and stored, the second groove chambers are formed in the tops of the first groove chambers, the connecting channels communicate with the multiple second groove chambers correspondingly, and the gas inlet channels are used for conveying gas to the connecting channels; the gas outlet channel is used for outputting gas flowing through the placing groove; the airflow disturbance part is arranged on the side, away from the first groove chamber, of the second groove chamber and can disturb airflow flowing through the second groove chamber, and the extension length of the airflow disturbance part is smaller than the depth of the second groove chamber. According to the gas chamber of the gas sensor disclosed by the utility model, the volume of the gas chamber can be reduced, so that the response speed and the gas diffusivity of the gas sensor are ensured while the gas tightness of a sensor array is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas sensing, in particular to a gas sensor chamber and a gas sensor component. Background Art

[0002] The gas sensor chamber is usually an enclosed space used to hold the gas sample to be measured so that the gas sample interacts with the sensitive element of the gas sensor. The gas sensor chamber has an important impact on the performance and accuracy of the sensor. Therefore, the volume size of the gas chamber, material selection, temperature control, gas chamber connection, and the location of the sensitive element all need to be carefully considered and adjusted to meet different application requirements and different gas sensor type requirements. The volume size of the gas chamber affects the response speed and detection sensitivity of the sensor, the material selection needs to interact with the target gas to produce a measurable response, and temperature control helps to ensure stable performance. The location of the sensitive element usually needs to be precisely arranged to ensure effective contact with the gas to be measured, thereby improving the accuracy of the measurement. Depending on the specific application and gas sensor type, the design of the gas sensor chamber will vary.

[0003] Most of the current gas sensor chambers can be divided into two categories. The first category is a single sensor independent chamber design. This type of chamber can only hold a single specific gas sensor. When applied to scenarios with multiple gas sensors, multiple chambers need to be connected with air pipes, which will greatly increase the area of ​​the entire sensor array and cause problems such as poor airtightness and uneven flow rate. The second category is an overall cavity design for multiple gas sensors. All required gas sensors are placed in a large cavity. Although the sensing area can be effectively reduced without air pipe connection, the air chamber volume is too large. For tiny gases, the excessively large air chamber volume will affect the response rate and gas diffusion of the gas sensor, resulting in inaccurate measurement results or failure to achieve the expected goals. Utility Model Content

[0004] The purpose of the utility model is to provide a gas sensor chamber and a gas sensor assembly, which can reduce the volume of the chamber, help improve the air tightness of the sensor array while ensuring the response speed and gas diffusivity of the gas sensor, thereby improving the accuracy of gas detection.

[0005] In a first aspect, the utility model provides a gas sensor chamber, comprising:

[0006] The gas chamber cover is provided with a placement groove, a connecting channel, an air inlet channel and an air outlet channel. The number of the placement grooves is multiple, and the multiple placement grooves are arranged on the gas chamber cover at intervals. The placement groove includes a first groove chamber and a second groove chamber. The first groove chamber is used for inserting and accommodating the gas sensor. The second groove chamber is arranged on the top of the first groove chamber. The connecting channel is connected to the multiple second groove chambers respectively. The air inlet channel is used to transport gas to the connecting channel, and the air outlet channel is used to output the gas after flowing through the placement groove;

[0007] An airflow disturbance member is arranged on a side of the second chamber away from the first chamber, the airflow disturbance member can disturb the airflow flowing through the second chamber, and an extension length of the airflow disturbance member is smaller than a depth of the second chamber.

[0008] The gas sensor chamber provided by the utility model can reduce the volume of the chamber by connecting multiple placement slots through a connecting channel. In addition, by arranging an air flow disturbance member in the second slot chamber, it is helpful to improve the gas diffusion of the gas sensor chamber.

[0009] Furthermore, the air inlet channel is arranged on the side of the air chamber cover facing away from the first slot chamber, and the air inlet channel is located at the center of the multiple placement slots, the number of the air outlet channels and the connecting channels are equal to the number of the placement slots, the multiple connecting channels respectively connect the multiple second slot chambers and the air inlet channels, and the multiple air outlet channels respectively connect the multiple second slot chambers and the outside of the air chamber cover.

[0010] By adopting the above technical solution, the gas sample to be tested can reach multiple placement slots respectively through multiple connecting channels after entering the air chamber from the air inlet channel. Since the air inlet channel is located at the center of the multiple placement slots, the distances from the air inlet channel to the multiple placement slots are similar. Therefore, the time for the gas sample to be tested to reach multiple gas sensors from the air inlet channel is also similar, that is, the gas flow rate and concentration in the placement slots at the same time are also similar, which helps to improve the accuracy of system testing and time control.

[0011] Furthermore, the air inlet channel and the air outlet channel are both arranged on the side wall of the air chamber cover, the number of the connecting channels is equal to the number of the placement grooves, multiple connecting channels are respectively connected to multiple second groove chambers, and the air inlet channel and the air outlet channel are respectively connected to different connecting channels.

[0012] Furthermore, the outer diameter of the airflow disruptor is gradually increased from close to the first groove chamber to far away from the first groove chamber, and the side wall of the second groove chamber is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively arranged on opposite sides of the airflow disruptor.

[0013] Furthermore, the airflow disturbance member is arranged in a cone shape.

[0014] Furthermore, the air chamber cover is also provided with a threaded hole, and the opening direction of the threaded hole is consistent with the opening direction of the second tank chamber.

[0015] Furthermore, there are a plurality of threaded holes, and the plurality of threaded holes are arranged at intervals on the air chamber cover.

[0016] Furthermore, the air chamber cover is provided with a first sealing groove around the first groove chamber, the first sealing groove is used for placing a first sealing member, and the first sealing member is used for abutting against the PCB board.

[0017] By adopting the above technical solution, a first seal is set. When the air chamber cover is connected to the PCB board through a threaded hole, the first seal is arranged between the air chamber cover and the PCB board. The first seal can block the gas in the first groove chamber, reduce the risk of gas in the first groove chamber overflowing through the gap between the air chamber cover and the PCB board, and help improve the air tightness of the gas chamber of the gas sensor.

[0018] Furthermore, the air chamber cover is provided with a second sealing groove around the second groove chamber, the second sealing groove is used for placing a second sealing member, and the second sealing member is used for abutting against the gas sensor on the PCB board.

[0019] By adopting the above technical solution, a second seal is set. When the gas sensor is placed in the first chamber, the second seal is arranged between the top of the first chamber and the gas sensor. The second seal can block the gas in the second chamber, reduce the risk of gas in the second chamber overflowing through the gap between the top of the first chamber and the gas sensor, and help improve the airtightness of the gas sensor chamber.

[0020] In a second aspect, the utility model provides a gas sensor assembly, comprising the gas sensor chamber described in any one of the above embodiments.

[0021] As can be seen from the above, the gas sensor chamber provided by the utility model can accommodate multiple gas sensors at the same time by setting multiple placement grooves on the chamber cover, and the multiple placement grooves are interconnected through connecting channels, so that the gas sensor chamber can simultaneously accommodate multiple gas sensors, thereby forming a gas sensor array. Compared with setting multiple independent gas sensor chambers, the gas sensor chamber of the utility model can reduce the area of ​​the sensor array, and the gas sensors are closely arranged without the need for external gas pipes to connect the multiple sensor chambers, which helps to improve the air tightness. Compared with the overall cavity design of multiple sensors, the gas sensor chamber of the utility model can reduce the volume of the chamber, increase the speed of gas reaching each sensor, and thus improve the response speed. In addition, the gas sensor is arranged in the first slot chamber, and the airflow disturbance member is arranged in the second slot chamber. The airflow disturbance member can disturb the airflow passing through the gas sensor, so that the gas can flow into the gas sensor faster, thereby improving the gas diffusion rate and diffusion uniformity of the gas sensor chamber; in addition, the airflow disturbance member can also reduce the influence of airflow velocity fluctuations and improve the stability of gas detection.

[0022] Other features and advantages of the present application will be described in the following description, and partly become apparent from the description, or be understood by practicing the embodiments of the present application. The purpose and other advantages of the present application can be realized and obtained by the structures specifically pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a schematic diagram of the structure of a gas sensor chamber.

[0024] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the gas sensor chamber.

[0025] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure of another section line of the gas sensor chamber in the middle.

[0026] Figure 4 It is a schematic cross-sectional structure diagram of another embodiment of the gas sensor chamber.

[0027] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of another section line of the gas sensor chamber in the middle.

[0028] Figure 6 This is a schematic structural diagram of another embodiment of a gas sensor chamber provided by the utility model.

[0029] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure of the gas sensor chamber.

[0030] In the accompanying drawings: 100, air chamber cover; 110, placement groove; 111, first groove chamber; 112, second groove chamber; 1121, air inlet; 1122, air outlet; 120, connecting channel; 130, air inlet channel; 140, air outlet channel; 170, threaded hole; 181, first sealing groove; 182, second sealing groove; 200, air flow disturbance member. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples, and such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0033] The utility model discloses a gas sensor chamber which is mainly used for detecting gas samples. The gas sensor chamber can reduce the area required for the sensor array and the volume of the chamber, which helps to improve the air tightness of the sensor array while ensuring the response speed and gas diffusivity of the gas sensor, thereby improving the accuracy of gas detection.

[0034] Reference Figure 1 , Attachment Figure 2In one embodiment, the gas sensor air chamber includes an air chamber cover 100 and an air flow disruptor 200 . The air chamber cover 100 is provided with a placement groove 110, a connecting channel 120, an air inlet channel 130 and an air outlet channel 140. There are multiple placement grooves 110, and multiple placement grooves 110 are arranged at intervals on the air chamber cover 100. The placement groove 110 includes a first slot chamber 111 and a second slot chamber 112. The first slot chamber 111 is used for inserting and accommodating the gas sensor. The second slot chamber 112 is arranged on the top of the first slot chamber 111. The connecting channel 120 is connected to multiple second slot chambers 112 respectively. The air inlet channel 130 is used to transport gas to the connecting channel 120, and the air outlet channel 140 is used to output the gas after flowing through the placement groove 110; the airflow disturbance member 200 is arranged on the side of the second slot chamber 112 away from the first slot chamber 111. The airflow disturbance member 200 can disturb the airflow flowing through the second slot chamber 112, and the extension length of the airflow disturbance member 200 is less than the depth of the second slot chamber 112.

[0035] It is worth noting that the material selection of the gas sensor air chamber is critical because the material will affect the performance and applicability of the sensor. The material should be selected according to the sensor type, target gas and environmental conditions. Specific materials may adsorb, desorb and chemically react with the gas. Specifically, the material of the gas sensor air chamber can be but is not limited to aluminum alloy, stainless steel, polytetrafluoroethylene, polypropylene, polyethylene, ceramic, glass, etc. The preparation method of the gas sensor air chamber includes but is not limited to 3D printing, machining, and injection molding. In other embodiments, the groove wall of the placement groove 110 can be coated to enhance the corrosion resistance of the air chamber. The number of placement grooves 110 can be four or six. The air chamber cover 100 can be round or square.

[0036] As can be seen from the above, the gas sensor air chamber provided by the utility model is configured with multiple placement grooves 110 on the air chamber cover 100, and the multiple placement grooves 110 are interconnected through the connecting channel 120, so that the gas sensor air chamber can accommodate multiple gas sensors at the same time, thereby forming a gas sensor array. Compared with the configuration of multiple independent gas sensor air chambers, the gas sensor air chamber of the utility model can reduce the area of ​​the sensor array, and the gas sensors are closely arranged without the need for external air pipes to connect the multiple sensor air chambers, which helps to improve the air tightness. Compared with the overall cavity design of multiple sensors, the gas sensor air chamber of the utility model can reduce the volume of the air chamber, increase the speed at which the gas reaches each sensor, and thus increase the response speed. In addition, the gas sensor is arranged in the first slot chamber 111, and the airflow disturbance member 200 is arranged in the second slot chamber 112. The airflow disturbance member 200 can disturb the airflow passing over the gas sensor, so that the gas can flow into the gas sensor faster, thereby improving the gas diffusion rate and diffusion uniformity of the gas sensor air chamber; in addition, the airflow disturbance member 200 can also reduce the impact of airflow velocity fluctuations and improve the stability of gas detection.

[0037] Reference Figure 2 , attached Figure 3 In one embodiment, the air inlet channel 130 is arranged on the side of the air chamber cover 100 facing away from the first slot chamber 111, and the air inlet channel 130 is located at the center of the multiple placement slots 110, the number of air outlet channels 140 and the connecting channels 120 are equal to the number of placement slots 110, the multiple connecting channels 120 are respectively connected to the multiple second slot chambers 112 and the air inlet channel 130, and the multiple air outlet channels 140 are respectively connected to the multiple second slot chambers 112 and the outside of the air chamber cover 100.

[0038] By adopting the above technical solution, after the gas sample to be tested enters the gas chamber from the air inlet channel 130, it can reach the multiple placement slots 110 respectively through the multiple connecting channels 120. Since the air inlet channel 130 is located at the center of the multiple placement slots 110, the distances from the air inlet channel 130 to the multiple placement slots 110 are similar. Therefore, the time for the gas sample to be tested to reach the multiple gas sensors from the air inlet channel 130 is also similar, that is, the gas flow rate and concentration in the placement slot 110 at the same time are also similar, which helps to improve the accuracy of system testing and time control.

[0039] In one embodiment, the outer diameter of the airflow disruptor 200 is gradually increased from close to the first groove chamber 111 to far away from the first groove chamber 111, and the side wall of the second groove chamber 112 is provided with an air inlet 1121 and an air outlet 1122, and the air inlet 1121 and the air outlet 1122 are respectively arranged on opposite sides of the airflow disruptor 200.

[0040] In one embodiment, the air flow disruptor 200 is configured in a cone shape.

[0041] Reference Figure 4 , Attachment Figure 5 In one embodiment, the air inlet channel 130 and the air outlet channel 140 are both arranged on the side wall of the air chamber cover 100, the number of connecting channels 120 is equal to the number of placement grooves 110, and multiple connecting channels 120 are respectively connected to multiple second groove chambers 112, and the air inlet channel 130 and the air outlet channel 140 are respectively connected to different connecting channels 120.

[0042] In one embodiment, the air chamber cover 100 is further provided with a threaded hole 170 , and the opening direction of the threaded hole 170 is consistent with the opening direction of the second tank chamber 112 .

[0043] In one embodiment, there are a plurality of threaded holes 170 , and the plurality of threaded holes 170 are disposed at intervals on the air chamber cover 100 .

[0044] Reference Figure 6 , Attachment Figure 7 In one embodiment, the air chamber cover 100 is provided with a first sealing groove 181 around the first groove chamber 111, and the first sealing groove 181 is used to place a first sealing member, and the first sealing member is used to abut against the PCB board.

[0045] Specifically, the first sealing member may be a silicone sealing pad.

[0046] By adopting the above technical solution, a first seal is set. When the air chamber cover 100 is connected to the PCB board through the threaded hole 170, the first seal is arranged between the air chamber cover 100 and the PCB board. The first seal can block the gas in the first slot chamber 111, reduce the risk of the gas in the first slot chamber 111 overflowing through the gap between the air chamber cover 100 and the PCB board, and help improve the air tightness of the gas chamber of the gas sensor.

[0047] Reference Figure 2 In one embodiment, the air chamber cover 100 is provided with a second sealing groove 182 around the second groove chamber 112, and the second sealing groove 182 is used to place a second sealing member, and the second sealing member is used to abut against the gas sensor on the PCB board.

[0048] Specifically, the second sealing member may also be a silicone sealing pad.

[0049] By adopting the above technical solution, a second seal is set. When the gas sensor is placed in the first chamber 111, the second seal is arranged between the top of the first chamber 111 and the gas sensor. The second seal can block the gas in the second chamber 112, thereby reducing the risk of the gas in the second chamber 112 overflowing through the gap between the top of the first chamber 111 and the gas sensor, thereby helping to improve the airtightness of the gas chamber of the gas sensor.

[0050] The installation process of the gas sensor and the gas sensor chamber is as follows:

[0051] Install the gas sensor on the PCB board;

[0052] Align the first tank chamber 111 with the gas sensor and press it down to fit the PCB board and the first sealing member;

[0053] The threaded connector is passed through the PCB board and threadedly connected to the threaded hole 170 to complete the installation of the gas sensor and the gas sensor chamber.

[0054] The utility model also provides a gas sensor component, comprising the gas sensor chamber of any one of the above embodiments.

[0055] In the description of this specification, the description with reference to the terms "one embodiment", "certain embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0056] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A gas sensor chamber, characterized in that: include: An air chamber cover (100) is provided with a placement groove (110), a connecting channel (120), an air inlet channel (130) and an air outlet channel (140); the placement groove (110) is in plurality, and the plurality of placement grooves (110) are arranged at intervals on the air chamber cover (100); the placement groove (110) comprises a first groove chamber (111) and a second groove chamber (112); the first groove chamber (111) is used for inserting and accommodating a gas sensor; the second groove chamber (112) is arranged at the top of the first groove chamber (111); the connecting channel (120) is connected to the plurality of second groove chambers (112) respectively; the air inlet channel (130) is used for conveying gas to the connecting channel (120); and the air outlet channel (140) is used for outputting gas after flowing through the placement groove (110); An airflow disturbance member (200) is arranged on a side of the second slot chamber (112) away from the first slot chamber (111); the airflow disturbance member (200) is capable of disturbing the airflow flowing through the second slot chamber (112); and an extension length of the airflow disturbance member (200) is less than a depth of the second slot chamber (112).

2. A gas sensor chamber according to claim 1, characterized in that: The air inlet channel (130) is arranged on a side of the air chamber cover (100) facing away from the first slot chamber (111), and the air inlet channel (130) is located at the center of the plurality of placement slots (110). The number of the air outlet channels (140) and the connecting channels (120) is equal to the number of the placement slots (110). The plurality of connecting channels (120) are respectively connected to the plurality of second slot chambers (112) and the air inlet channel (130), and the plurality of air outlet channels (140) are respectively connected to the plurality of second slot chambers (112) and the outside of the air chamber cover (100).

3. A gas sensor chamber according to claim 1, characterized in that: The air inlet channel (130) and the air outlet channel (140) are both arranged on the side wall of the air chamber cover (100); the number of the connecting channels (120) is equal to the number of the placement grooves (110); a plurality of the connecting channels (120) are respectively connected to a plurality of the second groove chambers (112); and the air inlet channel (130) and the air outlet channel (140) are respectively connected to different connecting channels (120).

4. A gas sensor chamber according to claim 1, characterized in that: The outer diameter of the airflow disruptor (200) is arranged to increase gradually from close to the first groove chamber (111) to far away from the first groove chamber (111), and the side wall of the second groove chamber (112) is provided with an air inlet (1121) and an air outlet (1122), and the air inlet (1121) and the air outlet (1122) are respectively arranged on opposite sides of the airflow disruptor (200).

5. A gas sensor chamber according to claim 4, characterized in that: The airflow disturbance member (200) is arranged in a cone shape.

6. A gas sensor chamber according to claim 1, characterized in that: The air chamber cover (100) is further provided with a threaded hole (170), and the opening direction of the threaded hole (170) is consistent with the opening direction of the second tank chamber (112).

7. A gas sensor chamber according to claim 6, characterized in that: There are a plurality of threaded holes (170), and the plurality of threaded holes (170) are arranged at intervals on the air chamber cover (100).

8. A gas sensor chamber according to claim 1, characterized in that: The air chamber cover (100) is provided with a first sealing groove (181) around the first groove chamber (111), the first sealing groove (181) being used to place a first sealing member, and the first sealing member being used to abut against a PCB board.

9. A gas sensor chamber according to claim 1, characterized in that: The gas chamber cover (100) is provided with a second sealing groove (182) around the second groove chamber (112), the second sealing groove (182) being used to place a second sealing member, and the second sealing member being used to abut against a gas sensor on a PCB board.

10. A gas sensor assembly, characterized in that: A gas sensor chamber comprising the gas sensor chamber according to any one of claims 1 to 9.

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