Calibration device and calibration method for gas alarm

Abstract

This invention specifically relates to a calibration device and method for a gas alarm. The calibration device includes a connecting mechanism, a gas storage section, a control valve, and a calibration component. The connecting mechanism has a connecting seat for fitting onto the detection port of the gas alarm, and a connecting pipe is provided on the connecting seat. The gas storage section is connected to the connecting seat via the connecting pipe, and contains a detection gas of a preset concentration. The control valve is located on the connecting pipe and is used to control the connection of the connecting pipe. The calibration component is mounted on the connecting mechanism. A control element is used to ensure that the connecting mechanism is properly installed. The calibration component has a control element that controls the opening and closing of the control valve, and the control element can emit a preset concentration value of the detection gas to the gas alarm. The calibration device for the gas alarm of this invention, by providing a connecting mechanism with a connecting seat, and in conjunction with the gas storage section, control valve, and calibration component, can reduce the operational difficulty of using the calibration device and improve the safety of its use.

Description

Technical Field

[0001] This invention belongs to the field of combustible gas safety detection technology, specifically relating to a calibration device and calibration method for a gas alarm. Background Technology

[0002] Currently, natural gas is widely used as a general energy source, from cooking and heating domestic water in ordinary households to common industrial energy applications. As a combustible gas, natural gas leaks, if not properly managed, can easily lead to explosions, poisoning, and other disasters. To prevent such accidents, gas detectors are installed for users or safety personnel to provide an alarm in the early stages of a gas leak, before the concentration reaches explosive or toxic levels, thus informing them of the leak. However, gas detectors are long-term products that operate continuously for many years. Due to environmental factors, the lifespan of electronic components, and improper use, gas detectors may fail to detect accurate gas concentrations and thus fail to alarm, creating safety hazards. Therefore, regular testing and calibration of gas detectors are essential.

[0003] Currently, the performance testing of gas alarms involves manually filling the corresponding detector of the combustible gas controller with standard gas to check whether the display of the gas rise controller and the determination of the alarm set value are normal. Some gas alarms are installed in high positions, and usually, it is necessary to manually build a ladder or use a telescopic pole to bring the pipeline connecting the detection gas to the alarm detection end for testing and calibration, which is very unsafe and inconvenient.

[0004] Manually using ladders or telescopic poles requires holding the pipeline inspection port with one hand while adjusting and calibrating the device or recording test data with the other, which is extremely cumbersome and complex. Furthermore, testing cannot be conducted far from the monitoring point, posing a risk of gas leakage and jeopardizing the safety of the testing personnel. Summary of the Invention

[0005] The purpose of this invention is to at least solve the problems of low safety and cumbersome operation in the detection and calibration of existing gas alarms. This objective is achieved through the following technical solution:

[0006] The first aspect of this invention provides a calibration device for a gas alarm, comprising:

[0007] A connecting mechanism having a connecting seat for fitting onto the detection port of a gas alarm, the connecting seat having a connecting end communicating with the detection port;

[0008] A gas storage unit is connected to the connection end via a connecting pipe, and a detection gas with a preset concentration value is provided inside the gas storage unit;

[0009] A control valve is disposed on the connecting pipeline and is used to control the on / off state of the connecting pipeline;

[0010] A calibration component is mounted on the connecting mechanism. The calibration component has a control element that controls the opening and closing of the control valve. The control element is used to determine whether the connecting mechanism is installed in place and to transmit a preset concentration value of the detected gas to the gas alarm.

[0011] The calibration device for a gas alarm according to the present invention includes a connecting mechanism, a gas storage unit, a control valve, and calibration components. By providing a connecting mechanism with a connecting seat, the calibration device can be quickly installed on the gas alarm, reducing the operational difficulty of using the device and improving its safety. Simultaneously, the connecting seat, gas storage unit, control valve, and calibration components can cooperate to achieve automated control of the calibration device's activation and can send a preset concentration value of the detected gas to the gas alarm, further enhancing the safety of the calibration process.

[0012] In addition, the calibration device for the gas alarm according to the present invention may also have the following additional technical features:

[0013] In some embodiments of the present invention, the connector is provided with a magnetic suction element, which is used to attract the detection port.

[0014] In some embodiments of the present invention, the control element further includes:

[0015] A signal transmitting unit, which is used to transmit a preset concentration value of the detected gas to the gas alarm;

[0016] A signal receiving unit is provided for receiving a start signal emitted by the gas alarm, which is used to control the start of the control valve.

[0017] In some embodiments of the present invention, the calibration component further includes:

[0018] A housing, which is mounted on the connecting mechanism, and a control component is mounted inside the housing;

[0019] An alarm is installed inside the housing. The alarm is used to indicate to the signal receiving unit that it has received the activation signal, and to indicate to the gas alarm that it has received the preset concentration value of the detected gas.

[0020] A battery, which is electrically connected to the control unit.

[0021] In some embodiments of the present invention, the connecting mechanism further includes a connecting bracket disposed on the connecting seat;

[0022] The housing includes a first housing and a second housing, the control component is mounted on the second housing, and the second housing is mounted on the connecting bracket;

[0023] The alarm and the battery are mounted on the control unit.

[0024] In some embodiments of the present invention, a start switch is provided on the first housing, and the start switch is used to control the start of the control component.

[0025] In some embodiments of the present invention, the signal transmitting part is configured as an infrared emitting diode, and the signal receiving part is configured as an infrared receiving diode;

[0026] The first housing has a communication hole for signal transmission.

[0027] In some embodiments of the present invention, the alarm includes a buzzer and / or a signal light, and the second housing has a horn opening and / or a signal light hole, the horn opening corresponding to the buzzer and the signal light hole corresponding to the signal light.

[0028] A second aspect of the present invention provides a calibration method for a gas alarm, the calibration method being performed using the calibration apparatus for the gas alarm according to the present invention, the calibration method comprising the following steps:

[0029] Activate the calibration component and attach the connector to the detection port of the gas alarm.

[0030] Once the connecting mechanism is in place, the control valve is opened by the control component, so that the detection gas in the gas storage compartment can enter the gas alarm.

[0031] Based on the fact that the opening time of the control valve is not less than a first preset time, the control component is controlled to transmit the preset concentration value of the detected gas to the gas alarm.

[0032] When the launch time of the control component reaches the second preset time, the control component controls the control valve to close and removes the control seat.

[0033] In some embodiments of the present invention, the installation in place according to the connecting mechanism includes:

[0034] The control unit determines that the connection mechanism is installed in place based on the start signal received from the gas alarm. Attached Figure Description

[0035] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0036] Figure 1 This is a schematic diagram of the calibration device for the gas alarm according to an embodiment of the present invention;

[0037] Figure 2 This is a schematic diagram of the connecting mechanism according to an embodiment of the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the calibration component according to an embodiment of the present invention;

[0039] Figure 4 This is a schematic diagram of the structure of the first housing according to an embodiment of the present invention;

[0040] Figure 5 This is a schematic diagram of the structure of the second housing according to an embodiment of the present invention;

[0041] Figure 6 This is a schematic diagram of the structure of the control component according to an embodiment of the present invention.

[0042] The markings in the attached diagram are as follows:

[0043] 1. Connecting mechanism; 11. Connecting seat; 111. Connecting end; 12. Connecting bracket; 121. First mounting hole; 13. Magnetic suction element;

[0044] 21. Connecting pipes;

[0045] 3. Control valve; 31. Signal connection cable;

[0046] 4. Calibration components; 41. First housing; 411. Start switch; 412. Communicating hole; 42. Second housing; 421. Horn mouth; 422. Signal light hole; 423. Second mounting hole; 424. Third mounting hole;

[0047] 5. Control unit; 51. Signal transmitter; 52. Signal receiver; 501. Switch; 502. Signal line connection port;

[0048] 6. Alarm; 61. Buzzer; 62. Signal light;

[0049] 7. Battery. Detailed Implementation

[0050] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0051] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

[0052] Although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used herein do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0053] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0054] like Figure 1 As shown, according to an embodiment of the present invention, a first aspect provides a calibration device for a gas alarm. In terms of overall design, the calibration device for the gas alarm includes a connecting mechanism 1, a gas storage section, a control valve 3, and a calibration component 4.

[0055] The connecting mechanism 1 includes a connecting seat 11 for mounting on the detection port of the gas alarm, with a connecting end 111 communicating with the detection port. A gas storage section is connected to the connecting end 111 via a connecting pipe 21, and contains a detection gas with a preset concentration value. A control valve 3 is mounted on the connecting pipe 21 to control its opening and closing. A calibration component 4 is mounted on the connecting mechanism 1 and includes a control element 5 for controlling the opening and closing of the control valve 3. The control element 5 determines whether the connecting mechanism 1 is properly installed and transmits the preset concentration value of the detection gas to the gas alarm.

[0056] The calibration device for a gas alarm described in this invention, by providing a connecting mechanism 1 with a connecting base 11, enables the calibration device to be quickly installed on the gas alarm, thereby reducing the operational difficulty of using the calibration device and improving its safety. Simultaneously, the connecting base 11 can cooperate with the gas storage unit, control valve 3, and calibration components 4 to achieve automated control of the calibration device's startup and send a preset concentration value of the detected gas to the gas alarm, further enhancing the safety of the calibration process.

[0057] like Figure 2As shown, the connecting mechanism 1 includes a connecting seat 11 and a connecting bracket 12. The connecting seat 11 is used to fit onto the detection port of the gas alarm, and at this time, the detection port of the gas alarm is cylindrical. A connecting end is provided in the connecting seat 11, and when the connecting seat 11 is fitted onto the detection port, the connecting end 111 communicates with the detection port on the detection port. Of course, if the detection port of the gas alarm is of other shapes, the connecting seat 11 can also be set as a groove with that shape to ensure that the connecting seat 11 can be fixed on the detection port.

[0058] Specifically, the connecting pipe 21 of the gas storage unit is connected to the connecting end 111 on the connecting seat 11, and a control valve 3 is provided on the connecting pipe 21. The control valve 3 can control the connection between the connecting pipe 21 and the connecting end 111. When the connecting pipe 21 and the connecting end 111 are connected, the detection gas in the gas storage unit is delivered to the gas alarm. In this embodiment, the control valve 3 is a solenoid valve and is electrically connected to the control component 5 through the signal connection line 31.

[0059] In some embodiments of the present invention, a magnetic suction element 13 is provided on the connector 11, which is used to attract the detection port. In this embodiment, the detection port is cylindrical and made of metal. Therefore, a magnetic suction element 13 is provided at the bottom of the connector 11. Specifically, the magnetic suction element 13 is embedded in the connector 11 and fixed with glue. When the connector 11 is fitted onto the detection port, the magnetic suction element 13 is attracted to the bottom of the detection port. This arrangement helps to reduce the installation difficulty of the connector 11. Of course, a magnetic suction element can also be provided in the detection port to improve the attraction capacity of the magnetic suction element 13, thereby realizing the installation of the connector 11.

[0060] It should be noted that the connector 11 can also be installed on the detection port using other structures, such as a snap-fit ​​structure or a screw-in structure. By incorporating components such as the magnetic suction element 13 to secure the connector 11 to the detection port, the user can avoid having to hold the pipeline detection port with one hand while adjusting the calibration device or recording test data with the other during calibration testing. Furthermore, a seal is provided at the connection between the connector 11 and the detection port to enhance the safety of the calibration device.

[0061] like Figure 3 As shown, the calibration assembly 4 also includes a housing, an alarm 6, and a battery 7. The housing is mounted on the connecting mechanism 1, and the control unit 5 is installed inside the housing. The alarm 6, installed inside the housing, is used to indicate that the signal receiving unit 52 has received an activation signal and to indicate that the gas alarm has received a preset concentration value of the detected gas. The battery 7 is installed in the control unit 5 and is electrically connected to the control unit 5.

[0062] Specifically, a control unit 5, an alarm 6, and a battery 7 are installed inside the housing. The control unit 5 determines whether the connecting mechanism 1 is properly installed. Once the connecting mechanism 1 is in place, the alarm 6 will activate and display the current operating status of the calibration device to the user. When the alarm 6 is activated, the control unit 5 will open the control valve 3, and at this time, the detection gas in the gas storage compartment will be delivered to the gas alarm. Then, the control unit 5 will transmit a preset concentration value of the detection gas to the gas alarm. The user can determine whether the control unit 5 has successfully transmitted information based on the changes in the alarm 6 and can then disassemble the calibration device at the detection port.

[0063] In some embodiments of the present invention, the housing includes a first housing 41 and a second housing 42, wherein the control element 5 is mounted on the second housing 42, and the second housing 42 is mounted on the connecting bracket 12. The alarm 6 and the battery 7 are both mounted on the control element 5. Figure 2 , Figure 4 and Figure 5 As shown, the connecting bracket 12 is configured with an "L" shape, and a first mounting hole 121 is provided on the connecting bracket 12. A third mounting hole 424 is provided on the second housing 42, and the third mounting hole 424 is a threaded hole. The second housing 42 can be fixed to the connecting bracket 12 by a connector. Specifically, the connector is a screw that can pass through the first mounting hole 121 and be screwed into the third mounting hole 424. In this embodiment, a threaded hole for mounting the control component 5 is also provided on the second housing 42. The control component 5 is a PCB board, and the PCB board can be fixed to the second housing 42 by a screw connector.

[0064] Furthermore, a second mounting hole 423 is provided on the second housing 42, and the second housing 42 is mounted on the first housing 41 by a screw threaded through the second mounting hole 423. This arrangement helps to reduce the assembly difficulty of the calibration component 4. At the same time, mounting both the alarm 6 and the battery 7 on the control component 5 reduces the installation space of the calibration component 4. In addition, the control component 5 is also provided with a signal line connection port 502, which is used to install the signal connection cable 31.

[0065] In some embodiments of the present invention, the control unit 5 further includes a signal transmitting unit 51 and a signal receiving unit 52. The signal transmitting unit 51 transmits a preset concentration value of the detection gas to the gas alarm. The signal receiving unit 52 receives a start signal transmitted by the gas alarm, which controls the activation of the control valve 3. By setting the signal receiving unit 52, it can be used to determine whether the calibration device is installed correctly. When the signal receiving unit 52 receives the start signal transmitted by the gas alarm, the control unit 5 controls the activation of the control valve 3. The signal transmitting unit 51 enables the transmission of the preset concentration value of the detection gas to the gas alarm, thus cooperating with the gas alarm's own detection function for gas alarm calibration.

[0066] like Figure 6 As shown, the signal transmitting unit 51 is configured as an infrared emitting diode, and the signal receiving unit 52 is configured as an infrared receiving diode. A through hole 412 for signal passage is provided on the first housing 41. In this embodiment, the signal receiving unit 52 is configured as an infrared receiving diode, and a through hole 412 is provided on the first housing 41. When the connector 11 is fitted onto the detection port, and the start signal emitted by the gas alarm can be received by the infrared receiving diode through the through hole 412, the control unit 5 determines that the calibration device has been installed in place, and that the preset concentration value of the detected gas emitted by the signal transmitting unit 51 can be received by the gas alarm.

[0067] Since the connector 11 in this embodiment can rotate around the axis of the detection port, the calibration device can be installed in place by rotating the connector 11 when it is fitted onto the detection port. Alternatively, the magnetic element 13 in the connector 11 can be oriented to match the magnetic element on the detection port of the gas alarm, thereby directly facilitating the installation of the calibration device.

[0068] In some embodiments of the present invention, the alarm 6 includes a buzzer 61 and / or an indicator light 62; that is, the alarm may have only a buzzer 61, only an indicator light 62, or both a buzzer 61 and an indicator light 62. The second housing 42 is provided with corresponding structures according to the composition of the alarm 6. If the alarm 6 only includes a buzzer 61, the second housing 42 is provided with a horn opening. If the alarm 6 only includes an indicator light 62, the second housing 42 is provided with an indicator light hole 422. If the alarm 6 includes both a buzzer 61 and an indicator light 62, the second housing is provided with a horn opening 421 and an indicator light hole 422. Figure 6As shown, a warning area is provided on the second housing 42, which specifically includes a horn opening 421 and a signal light hole 422, and is configured with the buzzer 61 and signal light 62 on the control component 5. The buzzer 61 and signal light 62 can be existing equipment, which can be purchased and used directly, thus helping to reduce the manufacturing cost of the calibration component 4.

[0069] In some embodiments of the present invention, a start switch 411 is provided on the first housing 41, and the start switch 411 is used to control the start of the control component 5. For example Figure 4 As shown, a start switch 411 is provided on the first housing 41, and correspondingly, a switch 501 is provided on the PCB board. Before the connector 11 is installed on the detection port, the start switch 411 needs to be pressed to put the control component 5 into working condition. The start switch 411 improves the safety of using the calibration component 4 and ensures the effectiveness of the calibration device.

[0070] This embodiment also relates to a calibration method for a gas alarm, which is performed using the aforementioned gas alarm calibration device, and includes the following steps:

[0071] Start the calibration component 4 and attach the connector 11 to the detection port of the gas alarm.

[0072] Once the connecting mechanism 1 is in place, the control valve 3 is opened by the control component 5 so that the detection gas in the gas storage compartment can enter the gas alarm.

[0073] Based on the fact that the opening time of the control valve 3 is not less than the first preset time, the control component 5 transmits the preset concentration value of the detected gas to the gas alarm.

[0074] When the launch time of the control component 5 reaches the second preset time, the control valve 3 is closed by the control component 5, and the control seat is removed.

[0075] Specifically, in this embodiment, the start switch 411 on the calibration component 4 is first turned on, and at this time, the indicator light 62 on the second housing 42 displays a solid red light. Then, the connecting seat 11 of the connecting mechanism 1 is inserted into the detection port of the gas alarm, and the connecting seat 11 is rotated and adjusted so that the connecting end 111 of the connecting mechanism 1 communicates with the detection hole on the gas alarm. At the same time, the infrared emitting / receiving diode of the calibration component 4 is aligned with the infrared receiving / emitting diode of the gas alarm being tested.

[0076] When the infrared receiving diode of the calibration component 4 receives the start signal transmitted by the infrared emitting diode of the gas alarm, the buzzer 61 of the calibration component 4 sounds briefly, and the indicator light 62 flashes red. At the same time, the calibration component 4 controls the control valve 3 to open the valve, and the connecting pipe 21 in the gas storage section will transmit the detection gas of known concentration to the detection port of the gas alarm through the control valve 3 and the connecting end 111.

[0077] Then, when the opening time of control valve 3 is not less than the first preset time, the infrared emitting diode of calibration component 4 will emit the preset concentration value of the detected gas to the infrared receiving diode in the gas alarm. At this time, the gas alarm enters the calibration state and acquires the concentration value in real time. When the emission time of the infrared emitting diode of calibration component 4 reaches the second preset time, and the gas alarm has completed the correction, the calibration is complete. Finally, the buzzer 61 on calibration component 4 will sound intermittently, and the indicator light 62 will return to constant illumination. At the same time, control valve 3 will be closed to stop the delivery of the detected gas. In this embodiment, the first preset time is 3s to 12s, and the second preset time is 5s to 12s.

[0078] In some embodiments of the present invention, the installation of the connecting mechanism 1 includes:

[0079] Based on the start signal received by the gas alarm from the control unit 5, it is confirmed that the connection mechanism 1 is installed in place.

[0080] Specifically, when the connector 11 is fitted onto the detection port, the connector 11 needs to be rotated so that the infrared receiving diode of the calibration component 4 is aligned with the infrared emitting diode of the gas alarm being tested. At this point, it can be confirmed that the connecting mechanism 1 is installed in place and calibration can be performed. In this embodiment, since a structure is adopted in which magnetic suction components 13 are provided on both the connector 11 and the detection port, and under the directional adsorption of the matching magnetic suction components 13, the calibration device can be accurately installed on the alarm being tested. That is, when the connector 11 is fitted onto the detection port, the infrared receiving diode of the calibration component 4 is directly aligned with the infrared emitting diode of the gas alarm being tested.

[0081] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention 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 the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A calibration device for a gas alarm, characterized in that, include: A connecting mechanism having a connecting seat for fitting onto the detection port of a gas alarm, the connecting seat having a connecting end communicating with the detection port; A gas storage unit is connected to the connection end via a connecting pipe, and a detection gas with a preset concentration value is provided inside the gas storage unit; A control valve is disposed on the connecting pipeline and is used to control the on / off state of the connecting pipeline; A calibration component is mounted on the connecting mechanism. The calibration component has a control element that controls the opening and closing of the control valve. The control element is used to determine whether the connecting mechanism is installed in place and to transmit a preset concentration value of the detected gas to the gas alarm. The control component determines that the connecting mechanism is installed in place based on the activation signal received from the gas alarm. The control component also includes: A signal transmitting unit, which is used to transmit a preset concentration value of the detected gas to the gas alarm; A signal receiving unit is provided for receiving a start signal emitted by the gas alarm, the start signal being used to control the start of the control valve. The connector is provided with a magnetic suction element, which is used to connect with the magnetic suction element on the detection port. Under the directional attraction of the two magnetic suction elements, the calibration device can be accurately installed on the gas alarm being detected.

2. The calibration device for a gas alarm according to claim 1, characterized in that, The calibration component also includes: A housing, which is mounted on the connecting mechanism, and the control component is mounted inside the housing; An alarm is installed inside the housing. The alarm is used to indicate to the signal receiving unit that it has received the activation signal, and to indicate to the gas alarm that it has received the preset concentration value of the detected gas. A battery, which is electrically connected to the control unit.

3. The calibration device for a gas alarm according to claim 2, characterized in that, The connecting mechanism also has a connecting bracket disposed on the connecting seat; The housing includes a first housing and a second housing, the control component is mounted on the second housing, and the second housing is mounted on the connecting bracket; The alarm and the battery are mounted on the control unit.

4. The calibration device for a gas alarm according to claim 3, characterized in that, The first housing is provided with a start switch, which is used to control the start of the control component.

5. The calibration device for a gas alarm according to claim 3, characterized in that, The signal transmitting part is configured as an infrared emitting diode, and the signal receiving part is configured as an infrared receiving diode; The first housing has a communication hole for signal transmission.

6. The calibration device for a gas alarm according to claim 3, characterized in that, The alarm includes a buzzer and / or a signal light. The second housing has a horn opening and / or a signal light hole, the horn opening corresponding to the buzzer and the signal light hole corresponding to the signal light.

7. A calibration method for a gas alarm, characterized in that, The calibration method is performed by the calibration apparatus of the gas alarm according to any one of claims 1-6, and the calibration method includes the following steps: Activate the calibration component and attach the connector to the detection port of the gas alarm. Once the connecting mechanism is in place, the control valve is opened by the control component, so that the detection gas in the gas storage compartment can enter the gas alarm. Based on the fact that the opening time of the control valve is not less than a first preset time, the control component is controlled to transmit the preset concentration value of the detected gas to the gas alarm. When the launch time of the control component reaches the second preset time, the control component controls the control valve to close and removes the connector.

8. The calibration method for a gas alarm according to claim 7, characterized in that, The installation according to the connecting mechanism includes: The control unit determines that the connection mechanism is installed in place based on the start signal received from the gas alarm.

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