TWI628396B - Gas measurement and leak detection device - Google Patents

Abstract

A gas measuring and leak detecting device comprises: a pressure regulating device, a pressure measuring unit, a leak detecting device, a leak detecting unit, a circuit board and a controller, thereby achieving gas cylinder pressure through the pressure measuring unit The measurement does know whether the pressure of the gas cylinder is sufficient, and then detects whether there is gas leakage between the back pipe and the gas burner through the leak detecting device and the leak detecting unit, so that the user can use the fire before the fire is used. Can clearly know the current state of gas use and the presence of leaks in the pipeline to ensure the safety of the fire.

Description

Gas measurement and leak detection device

The invention relates to a gas measuring and leak detecting device for detecting whether the pressure of a gas cylinder is sufficient and whether the pipeline is deflated.

Gas is a convenient but dangerous gas. Therefore, gas is added to the odor before it is sent to all households. This makes it easier for people to detect the leakage of gas, but it is caused by the leakage of gas. Accidents are still endless, mainly because gas is a colorless gas, which is not easy to detect, and people relax when they sleep or bathe, so the alertness is the lowest, even if the gas is stinky, it is difficult to smell, often When the gas leak is detected, the body has been affected by the gas, and many regrets are caused by this. Therefore, there are many safety devices in the market. The so-called safety devices actually use the flow rate generated by the gas during the leakage, so that the control valve in the safety device is activated, so that the closed pipe can be obtained by using the control valve. Function, but this kind of purely mechanized control, and the action is all in the control valve, the user is not easy to detect, and the gas leakage is a small amount, the control valve can not produce a closed action, there are doubts about failure.

In view of this, the inventors have been engaged in the manufacturing development and design experience of related products for many years, and after detailed design and careful evaluation of the above objectives, the present invention has finally become practical.

The technical problem to be solved by the present invention is to provide a gas measurement and leak detecting device in view of the above-mentioned shortcomings existing in the prior art.

A gas measurement and leak detecting device comprises: a pressure regulating device, a pressure measuring unit, a leak detecting device, a leak detecting unit, a circuit board and a controller, wherein the pressure regulating device is provided with an intake end And an air outlet end, and a pressure regulating chamber between the air inlet end and the air outlet end, the air inlet end and the pressure regulating chamber are connected to a pressure measuring unit through a manifold, and the pressure measuring unit is provided The elastic pressure sensing member is fixed in one or more airtight chambers formed by the lower casing, and the upper casing is connected to the manifold, and the lower casing is provided with a feeling And measuring the pressure through the sensing member and the pressure sensing device, the leakage detecting device is provided with an input end, an output end, and a valve chamber between the input end and the output end, the leak detecting device The input end is connected to the air outlet end of the pressure regulating device, the valve chamber is connected with the output end to be provided with a T-shaped channel, and the other outlet of the T-shaped channel is disposed to the bottom of the leak detecting device. The valve chamber is further provided with an excitation unit, which is connected with a reed switch and normally closed. The T-channel is open to the valve chamber, and the leak detecting unit has a cover disposed at the bottom of the T-channel outlet of the leak detecting device, and the cover recess is provided with a spring and a pressure sensing member. And the spring is pressed up against the pressure sensing member and normally touches the outlet of the T-shaped channel, and the detecting unit is further provided with a detecting component at the bottom of the leak detecting unit, and the sensing component and the pressure sensing member sense the pressure measurement. The circuit board is connected to the voltage measuring unit, the excitation unit and the leak detecting unit for receiving a function of feeding back signals and transmitting signals, and the controller is used for interlocking the circuit board to control the actuation of the excitation unit and adjusting the actuation schedule And the controller further comprises a normal light signal and an abnormal light signal respectively corresponding to the pressure measuring unit and the leak detecting unit, and the above structure is used to form a gas measuring and leak detecting device.

Compared with the efficacy of the prior art: (1) The invention achieves the measurement of the gas pressure of the gas cylinder through the pressure measuring unit, and it is indeed known whether the pressure of the gas cylinder is sufficient, and then the rear pipeline is sensed through the leak detecting device and the leak detecting unit. Whether there is gas leakage between the gas burners, the user can clearly know the current state of gas use and the leakage of the pipeline before the fire is used to ensure the safety of the fire.

(2) The excitation device is provided with an excitation unit and a reed switch, and is controlled by the circuit board to open and close, and the outlet of the T-channel of the leakage detecting device is further provided with a leak detecting unit and a detecting component, and The detecting component is connected to the signal of the circuit board. After the T-channel, the output pipeline, and the leak detecting unit are filled with gas, and the reed switch closes the T-channel opening, the detecting device can sense the leak detecting unit through the detecting component. The position of the pressure sensitive component floats to determine whether there is gas leakage. The control unit can control the excitation unit to close the T-channel. The whole detection process is complete, reliable, and has no doubts about failure.

(3) The use of the structure can detect the gas pipeline not in use, and the gas pipeline in use, when the gas pipeline in use is unstable, such as falling or strong abnormal pressure, the leak detection The unit can also be measured, and the reed unit controls the reed switch to close the T-channel, so that the gas is blocked from the valve chamber of the leak detecting device, and at the same time, the gas is prevented from being discharged from the output end to avoid the occurrence of gas explosion and other tragedies.

〔this invention〕

10‧‧‧ Pressure regulating device

11‧‧‧ intake end

111‧‧‧Connector

12‧‧‧Exhaust end

13‧‧‧Regulating chamber

14‧‧‧Management

15‧‧‧Control lever

16‧‧‧Pressure parts

20‧‧‧Measurement unit

21‧‧‧Inductive parts

22‧‧‧Upper casing

23‧‧‧ Lower case

24‧‧‧ airtight chamber

25‧‧‧Sensors

30‧‧‧Draining device

31‧‧‧ input

311‧‧‧Management

32‧‧‧ Output

33‧‧‧Valve room

34‧‧‧T-channel

341‧‧‧Export

35‧‧‧exciting unit

351‧‧Reed switch

40‧‧‧ leak detection unit

41‧‧‧ Cover

411‧‧‧Detecting room

42‧‧‧ Spring

43‧‧‧Inductive parts

44‧‧‧Detection

50‧‧‧ boards

60‧‧‧ Controller

61‧‧‧Start switch

62, 63‧‧‧Normal lights

621, 631‧‧‧Unusual lights

Fig. 1 is a perspective view of the present invention.

Fig. 2 is an exploded view of the invention.

Figure 3 is a schematic diagram of the detection process of the present invention.

Fig. 4 is a schematic view showing the detection of insufficient pressure of the gas cylinder of the present invention.

Fig. 5 is a schematic view showing the detection of sufficient pressure of the gas cylinder of the present invention.

Figure 6 is a schematic diagram showing the detection of no gas leakage in the pipeline at the end of the invention.

Figure 7 is a schematic diagram showing the detection of gas leakage in the pipeline at the end of the invention.

Fig. 8 is a schematic view showing the filling of a gas into a T-shaped channel under the normal leakage of the present invention.

Fig. 9 is a schematic view showing the normal closing of the T-shaped channel under the abnormal leakage of the present invention.

Figure 10 is a schematic view of another assembly manner of the present invention.

Figure 11 is another embodiment of the invention applicable to natural gas pipelines.

In order to enable your review committee to have a better understanding and understanding of the purpose, features and effects of the present invention, please refer to the following [Simplified Description of the Drawings] for details:

First, please refer to Figures 1 and 2 together with Figure 4, a gas measurement and leak detection device, comprising: a pressure regulating device 10, a pressure measuring unit 20, a leak detecting device 30, and a leak detecting unit. 40, a circuit board 50 and a controller 60, wherein the pressure regulating device 10 is provided with an air inlet end 11, an air outlet end 12, and a pressure regulating chamber between the air inlet end 11 and the air outlet end 12. A pressure measuring unit 20 is connected between the air inlet end 11 and the pressure regulating chamber 13 through a manifold 14 , and a control rod 15 is disposed in the pressure regulating chamber 13 corresponding to the air inlet end 11 and is transmitted through a control rod 15 . The pressure regulating member 16 is connected to adjust the control rod 15 to restrict the pressure and flow rate of the gas entering the pressure regulating chamber 13 through the air inlet end 11 by the control rod 15. The pressure measuring unit 20 is provided with a resilient pressure sensing member 21, which is provided. The pressure sensitive member 21 is fixed in one or more airtight chambers 24 composed of the lower casings 22 and 23, and the upper casing 22 is connected to the manifold 14, and the lower casing 23 is provided with a sense. The measuring device 25 senses the pressure measurement through the sensing member 25 and the pressure sensing member 21, and the leakage detecting device 30 is provided with an input end 31, an output end 32, and an input terminal 3 1 and a valve chamber 33 between the output terminals 32, The leakage detecting device 30 is connected to the air outlet end 12 of the pressure regulating device 10 through the pipe body, and the valve chamber 33 is connected with the output terminal 32 to provide a T-shaped channel 34, and the T-shaped channel is connected. The other outlet 341 of the passage 34 is disposed at the bottom of the leak detecting device 30. The valve chamber 33 is further provided with an excitation unit 35. The excitation unit 35 is coupled to a reed switch 351 and normally closed to the T-channel 34. The air leakage unit 40 has a cover 41 disposed at the bottom of the outlet 341 of the T-channel 34 of the leak detecting device 30. The cover 41 is recessed with a detecting chamber 411 to configure a spring 42. And a pressure sensing member 43 and abutting against the pressure sensing member 43 through the spring 42 to normally abut the outlet 341 of the T-shaped channel 34. Further, the detecting unit 40 is further provided with a detecting member 44 at the bottom of the leak detecting unit 40. The detecting member 44 and the pressure sensing member 43 sense the pressure measurement. The circuit board 50 is connected to the pressure measuring unit 20, the excitation unit 35 and the leak detecting unit 40 for receiving the feedback signal and transmitting the signal. A timer is built in, and the controller 60 is configured to interlock the circuit board 50 to control the actuation of the excitation unit 35 and adjust the actuation. Cheng, and has a start switch 61, and the controller 60 respectively correspond to more load cells 20 and 40 are each provided with a leak detection means 62, 63 the normal light signal and a light signal 621, 631 is not normal.

When the structure is actually used, please refer to FIG. 1 and FIG. 3 together with FIG. 4, the pressure regulating device 10 is provided with a joint 111 at the air inlet end 11 for mounting on a gas cylinder, and the output of the leak detecting device 30. The end 32 is fitted to the gas stove inlet. When the cylinder is opened and the gas enters the pressure regulating device 10 via the inlet end 11, the pressure is first introduced into the pressure measuring unit by the manifold 14 between the inlet end 11 and the pressure regulating chamber 13. In the case of 20, if there is no gas in the cylinder or the pressure is insufficient, the pressure of the manifold 14 entering the airtight chamber 24 cannot push the pressure sensitive member 21 downward, and the sensing member 25 fails at the same time. It is activated to generate an abnormal signal to the circuit board 50, so that the controller 60 is illuminated corresponding to the abnormal lamp number 621 of the pressure measuring unit 20, and informs the user that the gas storage capacity is insufficient to replace the cylinder.

Conversely, when the gas cylinder has a certain amount of gas pressure, please use the fifth figure. It can be seen that the pressure of the gas entering the airtight chamber 24 through the manifold 14 can actually push the pressure sensing member 21 to sink, and simultaneously touch the sensing member 25 through the pressure sensing member 21, and the sensing member will The signal is continuously activated to generate a normal signal to the circuit board 50, so that the controller 60 lights up corresponding to the normal light number 62 of the pressure measuring unit 20, and informs the user that the gas inventory still has sufficient pressure.

Furthermore, when the gas pressure is limited by the pressure regulating device 10 and is directed to the leak detecting device 30, it is continued as shown in FIGS. 5 and 6. The exciting unit 35 is interlocked with the reed switch 351 normally closed to the T. The opening of the passage 34 in the valve chamber 33 maintains the gas between the valve chamber 33 and the pressure regulating device 10. At this time, the activation switch 61 of the controller 60 is pressed to cause the excitation unit 35 to generate a magnetic force. The reed switch 351 is sucked away from the opening of the T-shaped passage 34 in the valve chamber 33, so that the T-shaped passage 34 is opened for gas to flow to the leak detecting unit 40 and the output end 32, and the output end 32 is closed because the gas burner is not opened. The connected pipeline forms a closed shape, and the gas pressure entering the detecting chamber 411 pushes the pressure sensing member 43 downward, indicating that the gas pressure is sufficient, and at the same time, the sensing member 44 senses the pressure sensing member 43 for a while, When the pressure is filled with the T-shaped channel 34, the output terminal 32, and the detection chamber 411, the excitation unit 35 is controlled by the timer of the circuit board 50 to cause the reed switch 351 to close the opening of the T-shaped channel 34, thereby The open end of the T-shaped channel 34 and the conduit of the output end 32 are all closed, after passing through a After the time, if the position of the pressure sensing member 43 is unchanged, and is also perceived by the detecting member 44, it represents that there is no gas leakage in the pipeline between the leak detecting device 30 and the gas burner, and then the circuit board 50 is further Sending a normal signal to the controller 60, causing the controller 60 to illuminate corresponding to the normal lamp number 63 of the leak detecting unit 40, informing the pipeline that there is no leakage condition, and simultaneously controlling the excitation unit 35 to generate a magnetic force through the circuit board 50, so that The reed switch 351 is disengaged from the opening to allow the gas to flow and the gas burner can be normally opened for cooking.

On the contrary, as shown in FIG. 7, when the position of the pressure sensing member 43 changes and the detecting member 44 is sensed during the set time, the pipeline between the leak detecting device 30 and the gas burner has When the gas leakage occurs, the detecting component 44 immediately sends an abnormal signal to the circuit board 50, and not only controls the exciting unit 35 via the circuit board 50 to interlock the reed switch 351 to close the opening of the T-shaped channel 34, and transmits one at the same time. The abnormal signal is sent to the controller 60, so that the controller 60 is illuminated corresponding to the abnormal lamp number 631 of the leak detecting unit 40, and the leaking condition is notified to the pipeline between the leak detecting unit 40 and the gas burner, and the detection processor must be immediately executed. .

Moreover, when the user drops the gas pipeline or has a strong abnormal pressure instability during the cooking process, the leak detecting unit 40 can also detect and immediately control the excitation unit 35 to move the reed switch with the circuit board 50. The 351 closes the opening of the T-shaped passage 34 to prevent gas circulators.

In addition, the controller 60 can also set the time when the excitation unit 35 is connected to the reed switch 351 through the timer of the circuit board 50. When the leakage detecting unit 40 detects that the pipeline is leak-free, and controls the excitation through the circuit board 50. When the unit 35 interlocks the reed switch 351 to open for the user to normally use the gas burner to cook, and then starts to time the opening time of the reed switch 351 through the circuit board 50, such as the opening time to reach the set closing time, When the gas furnace is stopped, the circuit board 50 immediately controls the excitation unit 35 to interlock the reed switch 351 to close the opening of the T-shaped passage 34 to form a safety switch to prevent gas from flowing between the leak detecting device 30 and the gas burner. Pipes to avoid accidents.

Moreover, when the gas furnace is turned off and stopped, the gas is still accumulated in the valve chamber 33, the T-channel 34 and the pipeline of the leak detecting device 30, and the excitation unit 35 is connected to the reed switch 351 to close the T-channel 34. The opening is used to block the gas from being sent into the T-channel 34 and between the pipelines. At this time, the leak detecting unit 40 continuously detects the pressure between the T-channel 34 and the pipeline, and can be further controlled by the controller. 60: setting the timer detection time of the circuit board 50. When there is no pressure relief or loss of pressure after the reed switch 351 is turned off, the reed switch 351 is normally turned off, and the controller 60 displays the normal light number 63. If When there is a pressure relief and a pressure loss condition, and the pressure sensing member 43 of the leak detecting unit 40 is raised and sensed, the timer detects that the reed switch 351 is closed until the leak detecting unit 40 senses the leakage time, and simultaneously transmits the excitation. The unit 35 interlocks the reed switch 351 to open and replenish the gas. If the leakage time is within the time set by the timer, it represents a normal leakage of the gas furnace mechanical operation, and the continuous reed switch 351 is opened to replenish the gas. (As shown in Figure 8), conversely, if the leakage time is higher than the time set by the timer, it means that the gas furnace or the pipeline is broken or the mechanical leakage is abnormal. The circuit board 50 controls the excitation unit 35 to rotate the reed switch 351 normally (as shown in FIG. 9), and simultaneously lights up the abnormal lamp number 631 of the corresponding leak detecting unit 40 on the controller 60 to inform the leak detecting unit 40. There is a leak in the pipeline to the gas burner, and the test must be performed immediately.

Another assembly mode of the structure is as shown in Fig. 10. The leak detecting device 30 is sleeved on the air outlet end 12 of the pressure regulating device 10 with the input end 31, and can be further penetrated through the input end 31 through the screw. It is fixed with the outlet end 12 limit.

Another embodiment of the structure, which is shown in FIG. 11 , includes a leak detecting device 30 , a pressure measuring unit 20 , a leak detecting unit 40 , a circuit board 50 , and a controller 60 . The leak detecting device 30 is provided with a manifold 311 radially connected from the input end 31 for connecting a pressure measuring unit 20, so that the pressure measuring unit 20 is directly mounted on the leak detecting device 30, and the installation of the pressure regulating device 10 is eliminated.俾Applicable to those who install natural gas pipelines that do not require pressure regulation.

According to the structure of the above specific embodiment, the following benefits can be obtained: (1) The invention achieves the measurement of the gas pressure of the gas cylinder through the pressure measuring unit 20, and it is indeed known whether the pressure of the gas cylinder is sufficient, and then passes through the leak detecting device 30. And the leak detecting unit 40 senses whether there is a gas leak between the back pipe and the gas burner, so that the user can clearly know the current gas use state and the leak of the pipeline before the fire is used to ensure that the gas is leaked. The safety of the use of fire.

(2) The leakage detecting device 30 is provided with an excitation unit 35 and a reed switch 351, and is controlled to be opened and closed by the circuit board 50, and the outlet 341 of the T-channel 34 of the leakage detecting device 30 is further provided with a leak detecting unit 40 and A detecting component 44 is connected to the circuit board 50 through the detecting component 44, and after the gas is filled in the T-channel 34, the output terminal 32, and the leak detecting unit 40, and the T-channel is closed by the reed switch 351. When the opening 34 is 34, the detecting member 44 senses the positional fluctuation of the pressure sensing member 43 of the leak detecting unit 40, thereby determining whether there is gas leakage, and can control the exciting unit 35 to cause the reed switch 351 to close the T-shaped channel. 34. The whole process of detection is complete, true, and has no doubts about failure.

(3) The use of its structure is to detect the gas pipeline that is not in use, and the gas pipeline in use, when the gas pipeline in use is unstable, such as falling or strong abnormal pressure, the leak detection unit 40 can also be measured, and the reed unit 35 controls the reed switch 351 to close the T-shaped passage 34, so that the gas is blocked in the valve chamber 33 of the leak detecting device 30, while preventing the gas from being discharged again from the output end 32, avoiding gas. Gas explosions and other tragedies.

In summary, the present invention has indeed achieved a breakthrough structural design, and has improved invention content, and at the same time, can achieve industrial utilization and progress, and the present invention is not found in any publication, but also novel, when In accordance with the provisions of the relevant laws and regulations of the Patent Law, the application for invention patents is filed according to law, and the examination authority of the bureau is required to grant legal patent rights.

The above is only a preferred embodiment of the present invention, and the scope of the present invention is not limited thereto; that is, the equivalent variations and modifications made by the scope of the present invention should still belong to the present invention. Within the scope of the patent.

Claims (3)

A gas measuring and leak detecting device comprises: a pressure regulating device, wherein the pressure regulating device is provided with an air inlet end, an air outlet end, and a pressure regulating chamber between the air inlet end and the air outlet end, the A pressure measuring unit is connected between the gas end and the pressure regulating chamber through a manifold; a pressure measuring unit, the pressure measuring unit is provided with an elastic pressure sensing member, and the pressure sensing member is fixed at one or more a gas-tight chamber formed by the casing, wherein the upper casing is connected to the manifold, and the lower casing is provided with a sensing member, and the pressure sensing member is sensed through the sensing member; a leakage device, the leakage detecting device is provided with an input end, an output end, and a valve chamber between the input end and the output end, the leak detecting device is connected to the air outlet end of the pressure regulating device by an input end, A T-shaped channel is disposed between the valve chamber and the output end, and another outlet of the T-shaped channel is disposed to the bottom of the leak detecting device, and the excitation chamber is further provided with an excitation unit. a reed switch is normally closed in the opening of the T-channel communicating with the valve chamber; a leak detecting unit, the The leaking unit has a cover disposed at the bottom of the T-channel outlet of the leak detecting device, the cover recessing a detecting chamber to configure a spring and a pressure sensing member, and pressing the pressure sensing member upward through the spring The normal state is opposite to the exit of the T-shaped channel, and a detecting component is further disposed at the bottom of the leak detecting unit, and the sensing pressure is sensed through the detecting component and the sensing component; a circuit board, the circuit board and the measuring device The voltage unit, the excitation unit and the leak detecting unit are connected to receive the feedback signal and the function of transmitting the signal, and further comprise a timer; a controller for interlocking the circuit board to control the excitation unit to operate and Adjusting the actuation time course and providing a start switch, and the controller is correspondingly corresponding to the pressure measuring unit And the leak detecting unit is provided with a normal light number and an abnormal light signal; the device is installed between a gas furnace and a gas cylinder, and the leak detecting unit is continuously detected when the gas furnace is closed and stopped. Measure the pressure between the T-channel and the pipeline, and then set the timer detection time of the circuit board by the controller. If there is pressure relief and pressure loss, and the pressure sensitive component of the leak detection unit rises, then Then, the timer is used to detect the time when the reed switch is turned off until the leak detecting unit senses the leak, and the reed switch is turned on and energized by the excitation unit. When the leakage time is within the time set by the timer, it is represented by If the gas furnace is mechanically operated and there is normal leakage, the reed switch will continue to control the refilling of the gas. Otherwise, if the leakage time is higher than the time set by the timer, it means that the gas furnace or the pipe is broken or Abnormal leakage caused by mechanical failure. At this time, the circuit board will control the excitation unit to rotate the reed switch normally, and the abnormal light of the corresponding leak detection unit on the controller will be illuminated. It is known that there is a leak in the pipeline between the leak detection unit and the gas burner, and the test handler must be performed immediately. The gas measuring and leak detecting device according to the first aspect of the invention, wherein the pressure regulating chamber of the pressure regulating device is provided with a control rod corresponding to the intake end, and the control rod is adjusted through a pressure regulating member, and further The control rod limits the pressure and flow of gas into the surge chamber through the intake end. A gas measurement and leak detecting device comprises: a leak detecting device, wherein the leak detecting device is provided with an input end, an output end, and a valve chamber between the input end and the output end, the leak detecting device is The input end is provided with a manifold for connecting a pressure measuring unit, the valve chamber is connected with the output end to provide a T-shaped passage, and the other outlet of the T-shaped passage is inserted to the bottom of the leak detecting device. The valve chamber is further provided with an excitation a unit, the excitation unit is linked to a reed switch and normally closed to the opening of the T-channel communicating with the valve chamber; a pressure measuring unit, the pressure measuring unit is provided with an elastic pressure sensing member, and the pressure sensing member is fixed The upper casing is connected to the manifold in the airtight chamber formed by the lower casing and the lower casing, and the lower casing is provided with a sensing member and is permeated through the sensing member and the pressure sensing member Pressure measuring unit; a leak detecting unit having a cover disposed at the bottom of the T-channel outlet of the leak detecting device, the cover recessing a detecting chamber provided with a spring and a pressure sensing member The spring is urged upwardly against the pressure sensing member and normally faces the outlet of the T-shaped channel, and the bottom of the leakage detecting unit is further provided with a detecting component, and the sensing component and the pressure sensing member sense the pressure measurement; a circuit board connected to the load cell, the excitation unit and the leak detecting unit for receiving a feedback signal and a function for transmitting a signal; a controller for interlocking the circuit board to control the excitation unit Actuate and adjust the operating schedule, and the controller is more separate The pressure measuring unit and the leak detecting unit are each provided with a normal light number and an abnormal light signal; the device is installed between a gas furnace and a gas cylinder, and the gas detecting unit is closed when the gas furnace is closed and stopped. It will continue to detect the pressure between the T-channel and the pipeline. The controller can also set the timer detection time of the board. If there is pressure relief and pressure loss, the pressure sensing unit of the leak detection unit will rise. When sensing, the timer detects the time when the reed switch is turned off until the leak detecting unit senses the leak, and simultaneously the reed switch is turned on and the gas is filled by the excitation unit, when the leakage time is between the time set by the timer. Inside, it represents the normal leakage of the gas furnace mechanical operation, and will continue to control the reed switch to open the gas. Otherwise, if the leakage time is higher than the time set by the timer, it means that there is a gas furnace or a pipeline. If the rupture or mechanical failure causes an abnormal leakage, the board will control the excitation unit to rotate the reed switch normally, and the corresponding leak detection unit on the controller will not The normal light is on, telling the leaking unit to the gas line between the burners that there may be a leak, and the test must be performed immediately.