Gas alarm

Abstract

The gas alarm comprises a shell, a circuit control board arranged in the shell and a gas sensor connected with the circuit control board, and the gas sensor is installed on a sensor base arranged on the circuit control board in a plug-and-play mode. An electronic information label of archive information including a product number, a product type, manufacturer information, an alarm historical record, replacement time information and an alarm voltage value of the initially installed gas sensor is recorded on the gas alarm; and an electronic information label of an alarm voltage value is recorded on the gas sensor. The sensor base is arranged on the circuit control board, so that plug-and-play can be realized when different gas sensors of the same type need to be replaced; under the condition that the whole gas alarm is not replaced, a new gas sensor can be replaced in time, so that the maintenance cost is greatly reduced, installation and replacement are simple, popularization and use are easy, a user is effectively promoted to frequently replace the new gas sensor, and potential safety hazards are thoroughly eliminated.

Description

Technical Field

[0001] This utility model relates to a combustible gas alarm, and more particularly to a gas alarm that improves the compatibility of gas sensors on the same combustible gas alarm. Background Technology

[0002] Existing gas detectors include combustible gas detectors and hazardous / toxic gas detectors. They issue an alarm signal when the concentration of combustible or toxic gas exceeds a set warning level. However, during use, moisture or fumes in the ambient air can accumulate on the gas sensor's detection surface over time. This reduces the number of gas molecules the sensor can detect after a gas leak, thus failing to achieve the intended warning. Furthermore, even gas sensors produced in the same batch can have inconsistent characteristics. This means that even when installing different gas sensors from the same batch, the alarm signal trigger point (hereinafter referred to as the alarm voltage value) will differ between each gas detector. Therefore, in existing technology, manufacturers install and debug different gas detectors based on their varying alarm voltage values. This means that the gas sensors in different gas detectors are not directly interchangeable, requiring the replacement of the entire gas detector. This increases the user's operating costs, leading to reduced use of gas detectors in daily life and creating significant safety hazards. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a gas alarm that is compatible with the use of different gas sensors of the same type on the same gas alarm, which has low maintenance cost and is easy to operate.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0005] This utility model discloses a gas alarm, comprising a housing, a circuit control board disposed within the housing, and a gas sensor connected to the circuit control board. The gas sensor is characterized in that it is installed in a plug-and-play manner on a sensor base disposed on the circuit control board; the gas alarm is equipped with an electronic information tag containing archival information including product number, product type, manufacturer information, alarm history records, replacement time information, and the initial alarm voltage value of the gas sensor; and the gas sensor is equipped with an electronic information tag containing the alarm voltage value.

[0006] The housing is made of plastic and includes an upper cover and a lower cover. The upper cover has a window and a snap cover at the window. The snap cover has several mesh holes. By opening the snap cover, the gas sensor to be replaced can be inserted into the housing through the window and installed on the sensor base set on the circuit control board.

[0007] The window is located on the front of the housing.

[0008] The circuit control board is electrically connected to the solenoid valve installed on the gas pipeline via wires.

[0009] The gas sensor is an N-type sensor, which can be a tin oxide sensor, a zinc oxide sensor, an iron oxide sensor, or an indium oxide sensor.

[0010] Electronic information tags can be QR codes, barcodes, Arabic numeral codes, or color dot labels.

[0011] The circuit control board is equipped with a Bluetooth receiver module, which pairs with the mobile terminal's application via wireless transmission.

[0012] Compared with the prior art, this utility model has the following advantages: 1. By setting a sensor base on the circuit control board, it can be plug-and-play when different gas sensors of the same type need to be replaced; 2. By using a mobile terminal to scan the electronic information tags recorded on the gas alarm and the gas sensor to be updated, relevant information is obtained and sent to the cloud for association and filing. The cloud sends the ratio of the alarm voltage value of the initially installed gas sensor to the alarm voltage value of the new gas sensor to the memory in the gas alarm, thereby enabling the compatible use of the same type of gas sensors but different gas sensors under the same gas alarm; 3. Without replacing the entire gas alarm, new gas sensors can be replaced in a timely manner, thereby greatly reducing maintenance costs. Installation and replacement are simple and easy to popularize, thus effectively encouraging users to frequently replace new gas sensors and completely eliminating safety hazards. Attached Figure Description

[0013] Figure 1 This is an external view of the gas alarm of this utility model.

[0014] Figure 2 yes Figure 1 An exploded diagram of a gas alarm.

[0015] Figure 3 This is a flowchart of the method of using this utility model.

[0016] Figure Labels

[0017] Housing 1, upper cover 11, lower cover 12, snap cover 13, circuit control board 2, sensor base 21, new gas sensor 22. Detailed Implementation

[0018] The technical problem to be solved by this utility model is: without replacing the entire gas alarm, a new gas sensor 22 can be replaced in a timely manner. This new gas sensor 22 is of the same type as the initial gas sensor (the gas sensor configured when the gas alarm is first installed), but is a different gas sensor.

[0019] "Same type" means that the gas sensors are made of the same material and detect the same target gas components (such as methane, coal gas, liquefied petroleum gas or harmful gases). "Different" means that different sensors are produced by the same manufacturer in the same batch, or that are the same type of sensors produced by different manufacturers.

[0020] The voltage values ​​collected by the alarm data acquisition terminal of this type of gas sensor show the same trend as the concentration of leaked gas changes. However, different sensors may collect different voltage values ​​for the same concentration of leaked gas. When the preset alarm concentration is reached, the voltage values ​​collected by different gas sensors will also be different (i.e., different gas sensors have different alarm voltage values). The technical problem that this invention aims to solve is how to make gas sensors with different alarm voltage values ​​compatible when a new gas sensor needs to be replaced on the same gas alarm.

[0021] I. This utility model mainly includes the following components

[0022] 1. Shell 1 ( Figure 1 )

[0023] It is made of plastic and includes an upper cover 11 and a lower cover 12. The upper cover 11 has a window and a latch 13 at the window. The latch 13 has several mesh holes. By opening the latch 13, the gas sensor that needs to be replaced can be inserted into the housing 1 through the window and installed on the sensor base 21 set on the circuit control board 2. The window is preferably located on the front or side of the housing 1.

[0024] 2. Circuit control board 2

[0025] It is electrically connected to a solenoid valve installed on the gas pipeline via a wire.

[0026] 3. Gas sensor ( Figure 2 )

[0027] The gas sensor of this invention is preferably made of semiconductor material, which can react to natural gas, liquefied petroleum gas and coal gas, and express a warning signal by changing the resistance value and the voltage change at the voltage acquisition terminal of the circuit.

[0028] The gas sensor described in this invention is preferably an N-type sensor, meaning that the resistance of the gas sensor decreases when it encounters a reactive gas. It can be a tin oxide sensor, zinc oxide sensor, iron oxide sensor, or indium oxide sensor.

[0029] II. Figure 3 As shown, the method of using different gas sensors of the same type on the same gas alarm (hereinafter referred to as the method) of this utility model includes the following steps:

[0030] 1) When the detector board on the gas alarm is contaminated and cannot be used normally, the existing technology is to replace the entire gas alarm along with the contaminated gas sensor. The disadvantage of this technology is that the maintenance cost is relatively high. Since the present invention has a sensor base 21 set on the circuit control board 2, the gas sensor can be replaced by simply removing and installing it in a plug-and-play manner.

[0031] 2) Pair the gas alarm with the new gas sensor 22 to be replaced, preferably using one of the following two methods:

[0032] a. Use a mobile terminal to scan the electronic information tags recorded on the gas alarm and the new gas sensor 22 to be replaced, and match the information obtained from the scan directly in the cloud.

[0033] b. The new gas sensor 22 to be replaced is equipped with a factory-issued coded tag. Use a mobile terminal to scan the electronic information tag recorded on this gas alarm, and enter the content of the coded tag in the pop-up interface. At this time, the mobile terminal can obtain the file information of the gas sensor corresponding to this coded tag from the cloud, and then match the file information with the gas alarm through the Internet of Things.

[0034] The information recorded includes product number, product type, manufacturer information, alarm history, replacement time information, and alarm voltage value of the gas sensor. The electronic information tag can be a QR code, barcode, Arabic numeral code, or color dot label.

[0035] The archive information is transmitted to the Internet of Things and the cloud via a Bluetooth transceiver module or a wireless transmission module set on the circuit control board 2.

[0036] 3) The cloud will calculate the ratio between the alarm voltage value of the initial gas sensor and the alarm voltage value of the new gas sensor 22 at the same gas alarm concentration, based on the information recorded in the above archives, and send it to the gas alarm, recording it in its memory. For example, the voltage value obtained from the alarm data acquisition terminal is used as an illustration:

[0037] The alarm voltage value of the initial gas sensor is 2 volts, and the alarm voltage value of the new gas sensor 22 is 3 volts before leaving the factory. The ratio is 2 / 3. After the new gas sensor 22 is installed on the gas alarm, when the concentration of the leaked gas changes, if the actual voltage value collected by the alarm data acquisition terminal is 2.7 volts, then the voltage value calculated by the MCU of the gas alarm based on the above ratio is 2.7 * 2 / 3 = 1.8 volts < 2 volts, and the alarm will not be triggered.

[0038] Note: The alarm voltage value detected by the new gas sensor 22 was obtained by testing under normal atmospheric pressure, with the same leaked gas concentration, and on a standard circuit board identical to the circuit control board 2 of the gas alarm.

Claims

1. A gas alarm, comprising a housing (1), a circuit control board (2) disposed within the housing (1), and a gas sensor connected to the circuit control board (2), characterized in that: The gas sensor is installed on the sensor base (21) on the circuit control board (2) in a plug-and-play manner. The gas alarm has an electronic information tag that records information including product number, product type, manufacturer information, alarm history, replacement time information and alarm voltage value of the initial gas sensor. The gas sensor has an electronic information tag that records the alarm voltage value.

2. The gas alarm according to claim 1, characterized in that: The housing (1) is made of plastic and includes an upper cover (11) and a lower cover (12). A window is provided on the upper cover (11), and a snap cover (13) is provided at the window. The snap cover (13) has several mesh holes. By opening the snap cover (13), the gas sensor that needs to be replaced can be inserted into the housing (1) through the window and installed on the sensor base (21) set on the circuit control board (2).

3. The gas alarm according to claim 2, characterized in that: The window is located on the front of the housing (1).

4. The gas alarm according to claim 3, characterized in that: The circuit control board (2) is electrically connected to the solenoid valve installed on the gas pipeline via wires.

5. The gas alarm according to claim 4, characterized in that: The gas sensor is an N-type sensor, which can be a tin oxide sensor, a zinc oxide sensor, an iron oxide sensor, or an indium oxide sensor.

6. The gas alarm according to claim 1, characterized in that: Electronic information tags can be QR codes, barcodes, Arabic numeral codes, or color dot labels.

7. The gas alarm according to claim 5, characterized in that: The circuit control board (2) is equipped with a Bluetooth receiving module, which pairs with the application of the mobile terminal through wireless transmission.

Images