Pressure detection assembly and gas meter

Abstract

The utility model provides a pressure detection assembly and a gas meter, and relates to the technical field of gas. The pressure detection assembly comprises a box body, a circuit board and a pressure detection piece. The first cavity and the second cavity are separated by the circuit board, so that the first cavity and the second cavity do not circulate with each other. The first ventilation opening and the second ventilation opening of the box body can be communicated with different environments, and one end of the pressure detection piece penetrates through the first ventilation opening so that the pressure detection piece can detect the pressure of the environment communicated with the first ventilation opening. And the other end of the pressure detection piece blocks the second communication port, so that the other end of the pressure detection piece can be communicated with the second cavity through the communication port, and is communicated with the external environment communicated with the second through hole through the second ventilation port so as to detect the air pressure of the external environment communicated with the second communication port. Therefore, the pressure detection member can detect the air pressure in a plurality of different environments through one pressure detection member, so that the structure of the pressure detection member is simpler, and the cost is lower.

Description

Technical Field

[0001] This application relates to a pressure detection component and a gas meter, belonging to the field of gas technology. Background Technology

[0002] With the rapid development of my country's economy and the improvement of modern people's living standards, gas has become a common feature in modern households. Consequently, gas safety has become increasingly important, with gas leaks being the primary risk. Household gas meters measure gas usage, and the main risk of gas leaks in homes is a malfunction of the gas meter. To detect gas leaks caused by meter malfunctions, the pressure difference between the inside and outside of the gas meter is measured. A significant pressure difference indicates a gas leak within the meter.

[0003] Currently, the method for detecting the pressure difference between the inside and outside of a gas meter is to set up multiple sensors to detect the pressure inside and outside the gas meter separately. This makes the gas meter's structure complex and its cost high. Utility Model Content

[0004] This application provides a pressure detection component and a gas meter, which solves the problem of high cost of gas meters that can detect internal and external pressure differences in related technologies.

[0005] In a first aspect, this application provides a pressure detection component, comprising:

[0006] The box body has an inner cavity, a first vent, and a second vent.

[0007] A circuit board is disposed in the inner cavity, the inner cavity including a first cavity and a second cavity, at least a portion of the first cavity is located on one side of the circuit board, at least a portion of the second cavity is located on the opposite side of the circuit board, the first cavity is connected to the first vent, the second cavity is connected to the second vent, and the circuit board has a connecting port connecting the first cavity and the second cavity.

[0008] A pressure detection element is disposed on the circuit board and located in the first cavity. The first detection end of the pressure detection element is connected to the outside of the box through the first vent, and the second detection end of the pressure detection element blocks the vent.

[0009] In some embodiments, the pressure sensing element further includes a first sealing ring disposed between the circuit board and the housing to seal the circuit board and the housing.

[0010] In some embodiments, the housing includes a support block located on the inner wall of the second cavity and facing the circuit board. The support block is arranged circumferentially along the second cavity. The support block has a first sealing groove, and a first sealing ring is embedded in the first sealing groove. The circuit board is disposed on the support block and pressed against the first sealing ring.

[0011] In some embodiments, the housing includes a shell and a protective sleeve, the circuit board is disposed within the shell, and the second cavity and the second vent are disposed within the shell. The protective sleeve is fitted over the pressure detection element, and the first cavity and the first vent are disposed within the protective sleeve. The first detection end is located within the protective sleeve.

[0012] In some embodiments, the housing further includes a potting layer that fills the shell portion to cover the circuit board facing away from the second cavity and the outer wall of the protective sleeve.

[0013] In some embodiments, the sidewall of the circuit board has a gap with the inner wall of the cavity, and the potting layer is also disposed between the sidewall of the circuit board and the inner wall of the cavity, so as to fix the circuit board in the cavity.

[0014] In some embodiments, the pressure sensing component further includes pads, through which the pressure sensing element is connected to the circuit board, the pads being arranged around the communication port.

[0015] In some embodiments, the pressure detection assembly further includes a connector, one end of which is located outside the housing, and the other end of which passes through the housing and is electrically connected to the circuit board.

[0016] In some embodiments, the first vent and the second vent are located on opposite sides of the housing, and the first detection end and the second detection end are located on opposite sides of the pressure detection element.

[0017] In some embodiments, the pressure detection assembly further includes a second sealing ring, which is fitted onto the housing, and the housing surface has external threads.

[0018] Secondly, based on the pressure detection component described above, this application also proposes a gas meter, including a meter body and the pressure detection component described above. The meter body includes a metering chamber and an installation chamber. At least a portion of the pressure detection component is disposed in the installation chamber. The first vent is connected to the metering chamber, and the second vent is connected to the installation chamber.

[0019] In some embodiments, the gas meter further includes a control module electrically connected to the pressure detection assembly, and the control module is located within the mounting cavity.

[0020] In the pressure detection assembly provided in this application, the pressure detection element is disposed on a circuit board and electrically connected to the circuit board. The circuit board separates the first cavity and the second cavity, preventing airflow and gas exchange between them. The first vent and the second vent of the housing can communicate with different environments. The first detection end of the pressure detection element communicates with the external environment through the first vent. The second detection end of the pressure detection element blocks the second connection port, allowing the second detection end of the pressure detection element to communicate with the second cavity through the connection port, thereby communicating with the external environment through the second vent port to detect the air pressure of the external environment connected to the second connection port. In this way, the pressure detection assembly of this application can detect the air pressure in multiple different environments by using a single pressure detection element, making the structure of the pressure detection assembly simpler and the cost lower.

[0021] The gas meter of this application includes the aforementioned pressure detection component. The first vent of the pressure detection component is connected to the metering cavity inside the gas meter body, and the second vent is connected to the mounting cavity of the gas meter body. This allows the pressure detection component to simultaneously detect the pressure inside and outside the meter body's measuring cavity, thereby obtaining the pressure difference between the inside and outside of the meter body. This makes the structure of the gas meter of this application simpler and the cost lower. Attached Figure Description

[0022] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0023] Figure 1 This is a schematic diagram of a pressure detection component according to an embodiment of this application;

[0024] Figure 2 This is an exploded structural diagram of the pressure detection component according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the connector of the pressure detection assembly according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of a gas meter according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram showing the connection between the pressure detection component and the gauge body in an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the exploded structure of a gas meter according to an embodiment of this application.

[0029] Figure label:

[0030] 100 - Box body, 110 - Inner cavity, 111 - First cavity, 112 - Second cavity, 113 - First vent, 114 - Second vent, 115 - Shell, 116 - Protective sleeve, 117 - Encapsulation layer, 120 - Buckle, 130 - Support block, 140 - First sealing ring, 150 - Second sealing ring, 160 - External thread.

[0031] 200 - Circuit board, 210 - Connector, 220 - Solder pad, 230 - Connector

[0032] 300 - Pressure testing element, 310 - First testing end, 320 - Second testing end.

[0033] 400-Meter body, 410-Base meter, 420-Top cover, 430-Gear, 440-Mounting hole, 450-Metering chamber, 460-Mounting chamber, 470-Counter, 480-Control module. Detailed Implementation

[0034] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.

[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and 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 application.

[0036] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0037] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between components; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0038] In 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.

[0039] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "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 any suitable manner in 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.

[0040] With the rapid development of my country's economy and the improvement of modern people's living standards, gas has become a common feature in modern households. Consequently, gas safety has become increasingly important, with gas leaks being the primary risk. Household gas meters measure gas usage, and the main risk of gas leaks in homes is a malfunction of the gas meter. To detect gas leaks caused by meter malfunctions, the pressure difference between the inside and outside of the gas meter is measured. A significant pressure difference indicates a gas leak within the meter.

[0041] Currently, the method for detecting the pressure difference between the inside and outside of a gas meter is to set up multiple sensors to detect the pressure inside and outside the gas meter separately. This makes the gas meter's structure complex and its cost high.

[0042] In the pressure detection assembly proposed in this application, the pressure detection element is disposed on a circuit board and electrically connected to the circuit board. The circuit board separates the first cavity and the second cavity, preventing the first cavity and the second cavity from flowing together or exchanging gas. The first vent and the second vent of the housing can communicate with different environments. The first detection end of the pressure detection element communicates with the external environment through the first vent. The second detection end of the pressure detection element blocks the second connection port, allowing the second detection end of the pressure detection element to communicate with the second cavity through the connection port, thereby communicating with the external environment through the second vent port to detect the air pressure of the external environment connected to the second connection port. In this way, the pressure detection assembly of this application can detect the air pressure in multiple different environments by setting a single pressure detection element, making the structure of the pressure detection assembly simpler and the cost lower.

[0043] The gas meter proposed in this application includes the aforementioned pressure detection component. The first vent of the pressure detection component is connected to the metering cavity inside the gas meter body, and the second vent is connected to the mounting cavity of the gas meter body. This allows the pressure detection component to simultaneously detect the pressure inside and outside the meter body's metering cavity, thereby obtaining the pressure difference between the inside and outside of the meter body. This makes the structure of the gas meter of this application simpler and the cost lower.

[0044] The pressure detection component and gas meter provided in this application will be described in detail below with reference to specific embodiments.

[0045] This application proposes a pressure detection component, with reference to... Figure 1 and Figure 2 As shown, it includes a housing 100, a circuit board 200, and a pressure detection component 300. This pressure detection component can be applied to gas meters.

[0046] The housing 100 is the basic component of the pressure detection assembly of this application. The housing 100 provides a mounting base for at least some other components of the pressure detection assembly and serves to protect those components. The housing 100 can be made of metal, giving it better structural strength, thus improving its durability and reliability. Alternatively, the housing 100 can be made of polymer materials, allowing it to maintain structural strength while remaining relatively lightweight.

[0047] The box body 100 has an inner cavity 110, which is a hollow structure inside the box body 100. The box body 100 is also provided with a first vent 113 and a second vent 114. The first vent 113 and the second vent 114 are openings formed on the surface of the box body 100. Both the first vent 113 and the second vent 114 are connected to the inner cavity 110, so that the outside of the box body 100 can be connected to the inner cavity 110 of the box body 100 through the first vent 113 and the second vent 114.

[0048] The inner cavity 110 of the housing 100 includes two independent cavities: a first cavity 111 and a second cavity 112. A circuit board 200 is disposed within the inner cavity 110 of the housing 100, located between the first cavity 111 and the second cavity 112, such that at least a portion of the first cavity 111 is located on one side of the circuit board 200, and at least a portion of the second cavity 112 is located on the other side of the circuit board 200. A first vent 113 of the housing 100 communicates with the first cavity 111, such that the external environment communicating with the first vent 113 is also communicating with the first cavity 111. Correspondingly, the air pressure in the first cavity 111 is the same as the air pressure in the external environment communicating with the first vent 113. The second vent 114 of the housing 100 is connected to the second cavity 112, so that the external environment connected to the second vent 114 is also connected to the second cavity 112. Accordingly, the air pressure of the second cavity 112 is the same as the air pressure of the external environment connected to the second vent 114.

[0049] The pressure detection element 300 is disposed on the circuit board 200, allowing the pressure detection element 300 to be electrically connected to the circuit board 200. The circuit board 200 can be connected to an external power source, enabling it to supply power to the pressure detection element 300. Alternatively, a battery can be integrated on the circuit board 200 to directly power both the circuit board 200 and the pressure detection element 300. The first detection end 310 of the pressure detection element 300 is connected to the outside of the housing 100 through the first vent 113. This allows the first detection end 310 of the pressure detection element 300 to contact the external environment connected to the first vent 113, thereby detecting the air pressure of the external environment connected to the first vent 113.

[0050] The circuit board 200 may also have a connecting port 210, which connects the first cavity 111 and the second cavity 112, allowing them to communicate. The second detection end 320 of the pressure detection element 300 blocks the connecting port 210, thus separating the first cavity 111 from the second cavity 112. Although the pressure detection element 300 is located inside the first cavity 111, its second detection end 320 can communicate with the second cavity 112, allowing it to detect the air pressure inside the second cavity 112. This also allows the pressure detection element 300 to detect the air pressure of the external environment connected to the second vent 114. Therefore, the pressure detection element 300 of this application can detect the air pressure in two independent environments by using only one element, thereby obtaining the pressure difference between the two independent environments.

[0051] The function of the connecting port 210 is to allow the pressure sensing element 300 to communicate with the second cavity 112. Correspondingly, the opening of the connecting port 210 does not need to be too large, thereby reducing the size of the opening on the circuit board 200 and making the structure of the circuit board 200 relatively more compact. The pressure sensing element 300 is disposed within the first cavity 111, so the pressure sensing element 300 does not need to pass through the circuit board 200. This reduces the manufacturing difficulty of mounting the pressure sensing element 300 on the circuit board 200 and also allows for a smaller diameter of the connecting port 210.

[0052] Specifically, the connection port 210 can be located on a part of the circuit board 200 where no circuit structure is provided, or the circuit structure on the circuit board 200 can avoid the connection port 210, so that the connection port 210 will not affect the electrical performance of the circuit board 200.

[0053] When the pressure detection component of this application is applied to a gas meter, the first vent 113 of the housing 100 can communicate with the internal metering chamber 450 of the gas meter, and the second vent 114 of the housing 100 can communicate with the outside of the metering chamber 450 of the gas meter. In this way, the pressure detection component can detect the pressure inside and outside the metering chamber 450 of the gas meter, thereby obtaining the pressure difference between the inside and outside of the metering chamber 450 of the gas meter to determine whether a gas leak has occurred in the gas meter.

[0054] In some implementations, reference Figure 1As shown, the first vent 113 and the second vent 114 of the housing 100 of this application can be disposed on opposite sides of the housing 100, such that the first vent 113 and the second vent 114 face opposite directions. When the first vent 113 faces the gas meter and communicates with the metering chamber 450 inside the gas meter, the second vent 114 faces away from the gas meter, so that the second vent 114 can naturally communicate with the outside of the metering chamber 450 of the gas meter, thereby making it easier to install the pressure detection component of this application on the gas meter.

[0055] In some implementations, reference Figure 1 As shown, in order to fix the pressure sensing element 300 onto the circuit board 200, the pressure sensing assembly of this application may further include a pad 220. The pad 220 is disposed between the pressure sensing element 300 and the circuit board 200, and the pad 220 is disposed around the communication port 210 on the circuit board 200, so that the pad 220 and the communication port 210 are misaligned. The pad 220 is fixedly connected to the circuit board 200, and the pressure sensing element 300 is fixedly connected to the pad 220, thereby making the pressure sensing element 300 fixedly connected to the circuit board 200 through the pad 220.

[0056] Specifically, the pressure detection component 300 can be fixed to the circuit board 200 by soldering. The pressure detection component 300 can be a pressure sensor, and the pins of the pressure sensor are soldered to the circuit board 200 to form a pad 220. Soldering the pressure detection component 300 to the circuit board 200 ensures a stable and reliable connection between the pressure detection component 300 and the circuit board 200. The pad 220 is offset from the connection port 210 on the circuit board 200, allowing the pad 220 to avoid blocking the connection port 210, thus ensuring that the other end of the pressure detection component 300 can communicate with the connection port 210. More specifically, the pad 220 can be wrapped around the connection port 210, which increases the contact area between the pad 220 and the pressure detection component 300 and the circuit board 200, making the connection between the pressure detection component 300 and the circuit board 200 through the pad 220 more stable and reliable.

[0057] In some implementations, reference Figure 2 and Figure 3 As shown, in order to fix the circuit board 200 in the inner cavity 110 of the housing 100, the circuit board 200 can be fixed in the inner cavity 110 of the housing 100 by snap-fit. This makes the process of installing the circuit board 200 in the housing 100 and removing it from the housing 100 simple and convenient, and improves the assembly efficiency of the pressure detection component of this application.

[0058] Specifically, two opposing latches 120 can be provided in the inner cavity 110 of the box body 100. One end of the latches 120 is elastically connected to the inner wall of the inner cavity 110 of the box body 100, allowing the latches 120 to bend relative to the box body 100. By applying external force to move the two latches 120 away from each other, the distance between the two latches 120 can be increased, at which point the circuit board 200 can be placed between the two latches 120. After releasing the two latches 120, the two latches 120 can move relative to each other under the action of their own elastic restoring force, thereby clamping the circuit board 200 between the two latches 120 to achieve the purpose of fixing the circuit board 200.

[0059] Limiting grooves can also be provided on the outer walls of the two buckles 120, and the two sides of the circuit board 200 can be embedded in the limiting grooves of the two buckles 120, so that the circuit board 200 is more stably and reliably fixed between the two buckles 120.

[0060] In some implementations, reference Figure 1 As shown, to protect the circuit board 200 and prevent it from being oxidized and damaged due to long-term exposure to air, the housing 100 of this application may include a shell portion 115 and a potting layer 117. The shell portion 115 is the main structure of the housing 100, and the second cavity 112 and the second vent 114 are opened in the shell portion 115, so that the circuit board 200 can be disposed inside the shell portion 115. The potting layer 117 fills the shell portion 115, specifically filling the space in the shell portion 115 on the side of the circuit board 200 facing away from the second cavity 112, so that the potting layer 117 can cover the circuit board 200. This can, to a certain extent, prevent the circuit board 200 from being exposed to air and damaged, thus protecting the circuit board 200 and making the pressure detection device 300 of this application more stable and reliable.

[0061] Specifically, the electrical components on the circuit board 200 can be disposed on the side of the circuit board 200 facing away from the second cavity 112. The potting layer 117 can cover the side of the circuit board 200 facing away from the second cavity 112, so that the potting layer 117 can cover the electrical components on the circuit board 200. In this way, the electrical components on the circuit board 200 can be isolated from the air to avoid damage to the electrical components.

[0062] Furthermore, the circumferential sidewall of the circuit board 200 can be configured to have a gap with the inner wall of the housing 115, and a portion of the potting layer 117 can be filled between the edge of the circuit board 200 and the inner wall of the housing 115, thereby making the circuit board 200 more stable and reliable when fixed in the housing 115. In addition, it can better seal the second cavity 112 and prevent the second cavity 112 from communicating with the outside through an opening other than the second vent 114. In this way, the air pressure in the first cavity 111 detected by the pressure detection element 300 and the air pressure in the second cavity 112 are more accurate, improving the detection accuracy of the pressure detection component of this application.

[0063] In some implementations, reference Figure 1 and Figure 2 As shown, to prevent the potting layer 117 from covering the pressure testing element 300 and affecting the testing accuracy of the pressure testing element 300, the housing 100 of this application may also include a protective sleeve 116. The protective sleeve 116 is fitted onto the pressure testing element 300, and the protective sleeve 116 can separate the pressure testing element 300 from the potting layer 117, preventing the potting layer 117 from covering the pressure testing element 300.

[0064] Specifically, both ends of the protective sleeve 116 can be opened. One end of the protective sleeve 116 is open so that the protective sleeve 116 can be fitted onto the pressure detection element 300, and the first detection end 310 of the pressure detection element 300 is located inside the protective sleeve 116. The other end of the protective sleeve 116 can be the first vent 113, and the first cavity 111 is located inside the protective sleeve 116, so that the first detection end 310 of the pressure detection element 300 can communicate with the first vent 113.

[0065] Therefore, during the assembly of the pressure detection component of this application, the protective sleeve 116 can be fitted onto the pressure detection component 300 and then glue can be poured into the housing 115 to form a glue layer 117. In this way, the glue layer 117 can cover the protective sleeve 116, and the protective sleeve 116 can separate the glue layer 117 from the pressure detection component 300.

[0066] In some implementations, reference Figure 1 and Figure 3 As shown, in order to enable the pressure detection component of this application to also connect to external electrical connection structures, such as external processing modules, the pressure detection component may also include a connector 230. One end of the connector 230 can pass through the housing 100 and extend into the housing 100 to be electrically connected to the circuit board 200, and the other end of the connector 230 can extend outside the housing 100, and the other end of the connector 230 can be electrically connected to other external electrical connection structures of the pressure detection component.

[0067] Specifically, the connector 230 can adopt a pin structure. One end of the connector 230 can pass through the housing 100 and be inserted into the circuit board 200. The external electrical connection structure can also include the circuit board 200. The other end of the connector 230 can be inserted into the external electrical connection structure for electrical connection.

[0068] In some implementations, reference Figures 1 to 3 As shown, to further ensure structural stability when the circuit board 200 is installed inside the housing 100, a support block 130 can be provided in the inner cavity 110 of the housing 100. Specifically, the support block 130 is located on the inner wall of the second cavity 112, and the circuit board 200 is mounted on the support block 130. A first sealing groove can be formed on the side of the support block 130 facing the circuit board 200, and a first sealing ring 140 can be provided in the first sealing groove. This can enhance the sealing performance of the connection between the circuit board 200 and the support block 130, thereby improving the sealing performance between the first cavity 111 and the second cavity 112.

[0069] refer to Figures 4 to 6 As shown, based on the pressure detection component described above, this application also proposes a gas meter, including a meter body 400 and the pressure detection component described above. The meter body 400 is the main component of the gas meter, and can be connected to a gas pipeline. The meter body 400 can measure the amount of gas input into the gas pipeline. The meter body 400 has a metering chamber 450 and an installation chamber 460, wherein the metering chamber 450 is the cavity through which gas flows within the meter body 400, and the metering chamber 450 and the installation chamber 460 are separated and independent of each other. At least a portion of the pressure detection component can be disposed within the installation chamber 460 of the meter body 400. The first vent 113 of the housing 100 of the pressure detection component can communicate with the metering chamber 450 of the meter body 400, and the second vent 114 of the housing 100 of the pressure detection component can communicate with the installation chamber 460 of the meter body 400. In this way, the pressure detection component can detect the gas pressure inside the metering chamber 450 of the meter body 400 and the gas pressure outside the metering chamber 450, thereby obtaining the pressure difference inside and outside the metering chamber 450 of the meter body 400, so as to determine whether the meter body 400 is malfunctioning, and thus determine whether the gas meter is malfunctioning.

[0070] In some implementations, reference Figure 6As shown, to allow the pressure detection component of this application to be installed on the gauge body 400, a mounting hole 440 is provided on the gauge body 400. The two ends of the mounting hole 440 are respectively connected to the metering chamber 450 and the mounting chamber 460. The housing 100 of the pressure detection component can pass through the mounting hole 440, such that one end of the pressure detection element 300 with the first vent 113 is inside the metering chamber 450 of the gauge body 400, and the other end of the pressure detection element 300 with the second vent 114 is outside the metering chamber 450 of the gauge body 400. The housing 100 and the gauge body 400 can also be detachably connected by bolts, making it easier to remove the pressure detection component from the gauge body 400.

[0071] For details, please refer to Figure 1 and Figure 5 As shown, the mounting hole 440 can be a threaded hole, and the surface of the housing 100 can be provided with an external thread 160. The housing 100 passes through the mounting hole 440, and the external thread 160 of the housing 100 is threadedly engaged with the mounting hole 440. A second sealing ring 150 is provided between the housing 100 and the outer wall of the watch body 400 around the mounting hole 440, and the second sealing ring 150 is sleeved on the housing 100.

[0072] For details, please refer to Figure 4 and Figure 6 As shown, the meter body 400 may include a base meter 410 and a top cover 420. A metering chamber 450 is located inside the base meter 410, and the top cover 420 is disposed on the surface of the base meter 410, such that the top cover 420 and the base meter 410 enclose a mounting cavity 460. A counter 470 and a gear 430 may also be disposed within the mounting cavity 460. One end of the gear 430 passes through the base meter 410 and engages with the counter 470 within the base meter 410. When gas flows within the base meter 410, the gear 430 rotates, thereby driving the counter 470 to count and obtain the gas flow rate passing through the meter body 400.

[0073] In some implementations, reference Figure 4 and Figure 6 As shown, the gas meter of this application may also include a control module 480, which can be electrically connected to a pressure detection component. The pressure detected by the pressure detection component inside and outside the meter body 400 can be transmitted to the control module 480. The control module 480 can determine whether the meter body 400 is abnormal based on the pressure difference inside and outside the meter body 400. The gas meter may also include an audible and visual alarm module, which can be electrically connected to the control module 480. When the control module 480 determines that the gas meter is abnormal, it can control the audible and visual alarm module to emit a signal. The control module 480 may be disposed within the mounting cavity 460.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A pressure detection component, characterized in that, include: The box body (100) has an inner cavity (110), a first vent (113) and a second vent (114); A circuit board (200) is disposed in the inner cavity (110). The inner cavity (110) includes a first cavity (111) and a second cavity (112). At least a portion of the first cavity (111) is located on one side of the circuit board (200), and at least a portion of the second cavity (112) is located on the opposite side of the circuit board (200). The first cavity (111) is connected to the first vent (113), and the second cavity (112) is connected to the second vent (114). The circuit board (200) has a communication port (210) that connects the first cavity (111) and the second cavity (112). A pressure detection element (300) is disposed on the circuit board (200) and located in the first cavity (111). The first detection end (310) of the pressure detection element (300) is connected to the outside of the box (100) through the first vent (113), and the second detection end (320) of the pressure detection element (300) blocks the connection port (210).

2. The pressure detection component according to claim 1, characterized in that, The pressure detection element (300) further includes a first sealing ring (140), which is disposed between the circuit board (200) and the housing (100) to seal the circuit board (200) and the housing (100).

3. The pressure detection component according to claim 2, characterized in that, The housing (100) includes a support block (130) located on the inner wall of the second cavity (112) and facing the circuit board (200). The support block (130) is arranged circumferentially along the second cavity (112). The support block (130) has a first sealing groove. The first sealing ring (140) is embedded in the first sealing groove. The circuit board (200) is disposed on the support block (130) and pressed against the first sealing ring (140).

4. The pressure detection component according to claim 1, characterized in that, The housing (100) includes a shell (115) and a protective sleeve (116). The circuit board (200) is disposed inside the shell (115), and the second cavity (112) and the second vent (114) are disposed in the shell (115). The protective sleeve (116) is fitted onto the pressure detection element (300), and the first cavity (111) and the first vent (113) are disposed in the protective sleeve (116). The first detection end (310) is located inside the protective sleeve (116).

5. The pressure detection component according to claim 4, characterized in that, The housing (100) also includes a potting layer (117) which fills the shell portion (115) to cover the side of the circuit board (200) facing away from the second cavity (112) and the outer wall of the protective sleeve (116).

6. The pressure detection component according to claim 5, characterized in that, The sidewall of the circuit board (200) has a gap with the inner wall of the inner cavity (110), and the potting layer (117) is also disposed between the sidewall of the circuit board (200) and the inner wall of the inner cavity (110) so that the circuit board (200) is fixed in the inner cavity (110).

7. The pressure detection component according to any one of claims 1-6, characterized in that, The pressure detection assembly also includes a pad (220), through which the pressure detection element (300) is connected to the circuit board (200), and the pad (220) is arranged around the communication port (210).

8. The pressure detection component according to any one of claims 1-6, characterized in that, The pressure detection assembly also includes a connector (230), one end of which is located outside the housing (100), and the other end of which passes through the housing (100) and is electrically connected to the circuit board (200).

9. The pressure detection component according to any one of claims 1-6, characterized in that, The first vent (113) and the second vent (114) are located on opposite sides of the housing (100), and the first detection end (310) and the second detection end (320) are located on opposite sides of the pressure detection element (300).

10. The pressure detection component according to claim 1, characterized in that, The pressure detection assembly also includes a second sealing ring (150), which is sleeved on the housing (100), and the housing (100) has an external thread (160) on its surface.

11. A gas meter, characterized in that, The device includes a body (400) and a pressure sensing component as described in any one of claims 1-10, wherein the body (400) includes a metering chamber (450) and a mounting chamber (460), at least a portion of the pressure sensing component is disposed in the mounting chamber (460), a first vent (113) communicates with the metering chamber (450), and a second vent (114) communicates with the mounting chamber (460).

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