A household gas alarm leakage alarm circuit

Abstract

The application discloses a household gas alarm leakage alarm circuit, comprising a first passive always-on sub-circuit, a second passive always-on sub-circuit, a first path output terminal, a second path output terminal and a three-pin plug, the first passive always-on sub-circuit is connected with the three-pin plug through the first path output terminal to send a normally closed signal when the working state of the household gas alarm is normal, and the second path output terminal is connected with the three-pin plug through the second path output terminal to send a passive normally closed signal when the working state of the household gas alarm alarms. The state of the household gas alarm is transmitted to the gas meter through the output signals of the two passive always-on sub-circuits, the current state of the household gas alarm can be effectively obtained by the gas meter, the software complexity and cost are reduced, and the electromagnetic radiation interference is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of gas safety, in particular, to a household gas alarm leakage alarm circuit. BACKGROUND

[0002] Gas safety is related to millions of households and the safety of people's lives and property. However, accidents caused by non-standard gas use or pipeline aging and leakage are still happening, and there is even a rising trend. Although kitchen indoor gas has added tetrahydrothiophene odorant, which has a pungent smell, if gas leakage occurs and accumulates, and the user does not discover it in time, it is easy to cause secondary disasters of gas.

[0003] The household gas alarm can detect the leakage of flammable gas in industrial environments and daily life environments (such as kitchens using natural gas). When the flammable gas alarm detects that the concentration of flammable gas reaches the alarm value set by the alarm, the flammable gas alarm will issue a sound and light alarm signal, and at the same time control the electromagnetic valve connected thereto to be attracted. After the electromagnetic valve is attracted, the gas pipeline is cut off, effectively avoiding the continuous leakage of gas and causing explosion and other serious events, so as to remind the adoption of personnel evacuation, forced ventilation, shutdown of equipment and other safety measures.

[0004] In the prior art, when the gas alarm detects gas leakage alarm, a driving signal is output to the gas meter to close the internal valve of the gas meter. Since the traditional gas alarm only simply outputs a driving signal to the internal valve of the gas meter to close it. The gas meter itself cannot obtain the current state of the gas alarm. If you want to know the state of the household gas alarm, you also need to add a communication interface between the two. This not only increases the software complexity and cost, but also the communication is easily disturbed by various electromagnetic radiation. SUMMARY

[0005] The purpose of the present application is to overcome the technical defects of the prior art and provide a household gas alarm leakage alarm circuit, which transmits the state of the household gas alarm to the gas meter through two-way relay passive output signals.

[0006] The purpose of the present application is achieved by the following technical solutions:

[0007] In a first aspect, the application provides a household gas alarm leakage alarm circuit, which comprises a first passive normally open sub-circuit, a second passive normally open sub-circuit, a first output terminal, a second output terminal and a three-pin plug, the first passive normally open sub-circuit is connected with the three-pin plug through the first output terminal to send a normally closed signal when the working state of the household gas alarm is normal, and the second output terminal is connected with the three-pin plug through the second output terminal to send a passive normally closed signal when the working state of the household gas alarm is alarming.

[0008] The first passive normally open sub-circuit comprises a first diode, a first relay, a first switch, a first transistor, a first resistor and a second resistor, the OUT1 end is connected with the base of the first transistor and one end of the second resistor through the first resistor, the emitter of the first transistor is connected with the other end of the second resistor and grounded, the collector of the first transistor is connected with the anode of the first diode and one end of the first relay respectively, the cathode of the first diode and the other end of the first relay are connected, and the first relay sends a normally closed signal to the three-pin plug through the first output terminal when the first switch is closed to the first position.

[0009] The second passive normally open sub-circuit comprises a second diode, a second relay, a second switch, a second transistor, a third resistor and a fourth resistor, the OUT2 end is connected with the base of the second transistor and one end of the fourth resistor through the third resistor, the emitter of the second transistor is connected with the other end of the fourth resistor and grounded, the collector of the second transistor is connected with the anode of the second diode and one end of the second relay respectively, the cathode of the second diode and the other end of the second relay are connected, and the second relay sends a passive normally closed signal to the three-pin plug through the second output terminal when the second switch is closed to the second position.

[0010] In a possible implementation, the first output terminal outputs a one-line connected with a pin of the three-pin plug, and a two-line connected with a two-pin of the three-pin plug.

[0011] The second output terminal outputs a three-line connected with a three-pin of the three-pin plug, and a four-line connected with a pin of the three-pin plug.

[0012] In a possible implementation, the first output terminal outputs a one-line and the second output terminal outputs a four-line are short-circuited.

[0013] In a possible implementation, when the household gas alarm is powered off or fails, the first relay controls the first switch to close to the first position to output a normally open signal, and the second relay controls the second switch to close to the first position to output a passive normally open signal.

[0014] In a possible implementation, when the household gas alarm is in a normal working state, the second relay controls the second switch to close to the first position to output a passive normally open signal.

[0015] In a possible implementation, when the household gas alarm is in an alarm working state, the first relay controls the first switch to close to the second position to output a passive normally open signal.

[0016] In a second aspect, the present application provides a household gas alarm leakage alarm device, characterized in that the device comprises a household gas alarm and a gas meter connected with the household gas alarm, and the household gas alarm comprises a household gas alarm leakage alarm circuit.

[0017] The above main scheme of the present application and each further selected scheme thereof can be freely combined to form multiple schemes, all of which are the schemes that can be adopted and claimed by the present application; and the present application can also be freely combined between (each non-conflict selection) selections and between other selections. Those skilled in the art can understand that there are many combinations according to the prior art and common knowledge after understanding the schemes of the present application, all of which are the technical schemes claimed by the present application, and are not listed here.

[0018] The present application discloses a household gas alarm leakage alarm circuit, comprising a first passive normally open sub-circuit, a second passive normally open sub-circuit, a first output terminal, a second output terminal, and a three-pin plug. The first passive normally open sub-circuit is connected with the three-pin plug through the first output terminal to send a normally closed signal when the household gas alarm is in a normal working state. The second output terminal is connected with the three-pin plug through the second output terminal to send a passive normally closed signal when the household gas alarm is in an alarm working state. The state of the household gas alarm is transmitted to the gas meter through the output signals of the two passive normally open sub-circuits, so that the gas meter can effectively obtain the current state of the household gas alarm, reducing software complexity and cost while reducing electromagnetic radiation interference. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 A schematic diagram of the household gas alarm leakage alarm circuit according to the embodiments of the present application is shown.

[0020] Figure 2 A connection block diagram of the household gas alarm leakage alarm device is shown.

[0021] Icon: first output terminal F1; second output terminal F2; three-pin plug S1; first switch K1; second switch K2; first relay J1; second relay J2; first diode D1; second diode D2; first triode Q1; second triode Q2; first resistor R1; second resistor R2; third resistor R3; fourth resistor R4. DETAILED DESCRIPTION

[0022] The present application is described and explained with additional specificity and detail through the use of the accompanying drawings in which:

[0023] In view of the explanations above, those of ordinary skill in the art may, without departing from the spirit of the application, make other embodiments and modifications that are also intended to fall within the scope of the application. It should be understood that features from the various exemplary embodiments described herein can be employed in any

[0024] In the prior art, when the gas alarm detects a gas leakage alarm, a driving signal is output to the gas meter to close the internal valve of the gas meter. Since the conventional gas alarm simply outputs a driving signal to the internal valve of the gas meter to close it, the gas meter itself cannot obtain the current state of the gas alarm. If the state of the household gas alarm needs to be known, a communication interface needs to be added between the two. This not only increases the software complexity and cost, but also makes the communication susceptible to various electromagnetic radiation interference.

[0025] Therefore, in order to solve the above problems, the present application provides a household gas alarm leakage alarm circuit, which is located in the household gas alarm and connected with the gas meter to realize the interconnection between the household gas alarm and the gas meter. The state of the household gas alarm is conveyed to the gas meter through two passive normally open sub-circuit output signals, so that the gas meter can effectively obtain the current state of the household gas alarm, reduce the software complexity and cost, and reduce the electromagnetic radiation interference. Next, it will be described in detail.

[0026] Please refer to Figure 1 , Figure 1A household gas alarm leakage alarm circuit is shown, which comprises a first passive normally open subcircuit, a second passive normally open subcircuit, a first output terminal F1, a second output terminal F2 and a three-pin plug S1. The first passive normally open subcircuit is connected with the three-pin plug S1 through the first output terminal F1 to send a normally closed signal when the working state of the household gas alarm is normal. The second output terminal F2 is connected with the three-pin plug S1 through the second output terminal F2 to send a passive normally closed signal when the working state of the household gas alarm is alarming.

[0027] The first passive normally open subcircuit comprises a first diode D1, a first relay J1, a first switch K1, a first transistor Q1, a first resistor R1 and a second resistor R2. The OUT1 terminal is connected with the base of the first transistor Q1 and one end of the second resistor R2 through the first resistor R1. The emitter of the first transistor Q1 is connected with the other end of the second resistor R2 and grounded. The collector of the first transistor Q1 is connected with the anode of the first diode D1 and one end of the first relay J1, respectively. The cathode of the first diode D1 and the other end of the first relay J1 are connected. The first relay J1 controls the first switch K1 to close to the first position to send a normally closed signal to the three-pin plug S1 through the first output terminal F1.

[0028] The second passive normally open subcircuit comprises a second diode D2, a second relay J2, a second switch K2, a second transistor Q2, a third resistor R3 and a fourth resistor R4. The OUT2 terminal is connected with the base of the second transistor Q2 and one end of the fourth resistor R4 through the third resistor R3. The emitter of the second transistor Q2 is connected with the other end of the fourth resistor R4 and grounded. The collector of the second transistor Q2 is connected with the anode of the second diode D2 and one end of the second relay J2, respectively. The cathode of the second diode D2 and the other end of the second relay J2 are connected. The second relay J2 controls the second switch K2 to close to the second position to send a passive normally closed signal to the three-pin plug S1 through the second output terminal F2.

[0029] When the household gas alarm is powered off or fails, the first relay J1 controls the first switch K1 to close to the first position to output a normally open signal, and the second relay J2 controls the second switch K2 to close to the first position to output a passive normally open signal.

[0030] When the working state of the household gas alarm is normal, the second relay J2 controls the second switch K2 to close to the first position to output a passive normally open signal.

[0031] When the working state of the household gas alarm is alarming, the first relay J1 controls the first switch K1 to close to the second position to output a passive normally open signal.

[0032] The household gas alarm mainly has three states: normal, alarm and power failure or fault, and the household gas alarm needs to feed back the three different states to the gas meter, so different signals must be sent. When the household gas alarm is normally powered on and works normally, the first relay J1 controls the first switch K1 to close to the first position to send a normally closed signal through the first output terminal F1 to the three-pin plug S1, and the second relay J2 controls the second switch K2 to close to the first position to output a passive normally open signal, so as to inform the gas meter that the household gas alarm is normally powered on and works normally.

[0033] When the household gas alarm is powered off or fails, the household gas alarm will output a normally open signal through the first relay J1 controlling the first switch K1 to close to the first position, and a passive normally open signal through the second relay J2 controlling the second switch K2 to close to the first position, so as to inform the gas meter of the abnormal state of the household gas alarm when it is powered off or fails.

[0034] When the household gas alarm detects that the gas leakage exceeds the concentration alarm, the household gas alarm will output a passive normally open signal through the first relay J1 controlling the first switch K1 to close to the second position, and a passive normally closed signal through the second relay J2 controlling the second switch K2 to close to the second position, and send the signal to the three-pin plug S1 through the second output terminal F2, so as to inform the gas meter of the alarm state of the household gas alarm.

[0035] The first output terminal F1 outputs a one-line to a pin of the three-pin plug S1, and a two-line to a two-pin of the three-pin plug S1;

[0036] The second output terminal F2 outputs a three-line to a three-pin of the three-pin plug S1, and a four-line to a pin of the three-pin plug S1.

[0037] The first output terminal F1 outputs a one-line and the second output terminal F2 outputs a four-line.

[0038] The output line of the first output terminal F1 is a one-line and a two-line, and the output line of the second output terminal F2 is a three-line and a four-line, and the connection mode of the three-pin plug S1 is that the one-line is connected to a pin of the three-pin plug S1, the two-line is connected to a two-pin of the three-pin plug S1, the three-line is connected to a three-pin of the three-pin plug S1, and the four-line is connected to a pin of the three-pin plug S1, and the one-line and the four-line output by the second output terminal F2 have the purpose of preventing plagiarism.

[0039] In addition, the application provides a household gas alarm leakage alarm device, which comprises a household gas alarm and a gas meter connected with the household gas alarm, and the household gas alarm comprises a household gas alarm leakage alarm circuit. Figure 2 ,Figure 2 The connection block diagram of the household gas alarm leakage alarm device is shown. The household gas alarm is connected with the power supply, starts to work by using the alternating current, and is connected with the gas meter. The gas meter is built-in with the electromagnetic valve, and the gas meter determines the closure of the gas pipeline by controlling the closure of the electromagnetic valve. The gas valve sends the gas to the gas stove or the water heater for the user to use.

[0040] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0041] Firstly, by increasing two relay output signals, the working state of the household gas alarm is conveyed to the gas meter. The conveyed signals are all passive switch signals, which reduces the external electromagnetic interference.

[0042] Secondly, the output line and the three-pin plug can prevent plagiarism, simplify the interconnection between the household gas alarm and the gas meter, and do not need to increase the communication and communication protocol between the two, thereby reducing the complexity of the circuit.

[0043] In summary, the household gas alarm leakage alarm circuit disclosed in the present application comprises a first passive normally open sub-circuit, a second passive normally open sub-circuit, a first output terminal, a second output terminal, and a three-pin plug. The first passive normally open sub-circuit is connected with the three-pin plug through the first output terminal to send a normally closed signal when the working state of the household gas alarm is normal. The second output terminal is connected with the three-pin plug through the second output terminal to send a passive normally closed signal when the working state of the household gas alarm is alarming. The state of the household gas alarm is conveyed to the gas meter through the two passive normally open sub-circuit output signals, so that the gas meter can effectively obtain the current state of the household gas alarm, reduce the software complexity and cost, and reduce the electromagnetic radiation interference.

[0044] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A household gas alarm leak alarm circuit, characterized in that, The circuit comprises a first passive always-on sub-circuit, a second passive always-on sub-circuit, a first output terminal, a second output terminal and a three-pin plug, the first passive always-on sub-circuit is connected with the three-pin plug through the first output terminal to send a normally closed signal when the household gas alarm is in a normal working state, and the second output terminal is connected with the three-pin plug through the second output terminal to send a passive normally closed signal when the household gas alarm is in an alarm working state. The first passive always-on sub-circuit comprises a first diode, a first relay, a first switch, a first transistor, a first resistor and a second resistor, an OUT1 terminal is connected with a base of the first transistor and one end of the second resistor through the first resistor, an emitter of the first transistor is connected with the other end of the second resistor and grounded, a collector of the first transistor is connected with an anode of the first diode and one end of the first relay respectively, a cathode of the first diode and the other end of the first relay are connected, and the first relay sends a normally closed signal through the first switch when the first switch is closed to the second position and sends the normally closed signal to the three-pin plug through the first output terminal. The second passive always-on sub-circuit comprises a second diode, a second relay, a second switch, a second transistor, a third resistor and a fourth resistor, an OUT2 terminal is connected with a base of the second transistor and one end of the fourth resistor through the third resistor, an emitter of the second transistor is connected with the other end of the fourth resistor and grounded, a collector of the second transistor is connected with an anode of the second diode and one end of the second relay respectively, a cathode of the second diode and the other end of the second relay are connected, and the second relay sends a passive normally closed signal through the second switch when the second switch is closed to the second position and sends the passive normally closed signal to the three-pin plug through the second output terminal. The output line of the first output terminal F1 is a first line and a second line, the output line of the second output terminal F2 is a third line and a fourth line, the first line output by the first output terminal is connected with a pin of the three-pin plug, and the second line is connected with a second pin of the three-pin plug. The third line output by the second output terminal is connected with a third pin of the three-pin plug, and the fourth line is connected with a pin of the three-pin plug. The first line output by the first output terminal and the fourth line output by the second output terminal are short-circuited.

2. A domestic gas alarm leak alarm circuit as claimed in claim 1, characterised in that, When the household gas alarm is powered off or fails, the first relay controls the first switch to be closed to a first position to output a normally open signal, and the second relay controls the second switch to be closed to the first position to output a passive normally open signal.

3. A leak alarm circuit for a domestic gas alarm as claimed in claim 1, characterised in that, When the household gas alarm is in a normal working state, the second relay controls the second switch to be closed to the first position to output a passive normally open signal.

4. A leak alarm circuit for a domestic gas alarm as claimed in claim 1, characterised in that, When the household gas alarm is in an alarm working state, the first relay controls the first switch to be closed to the first position to output a passive normally open signal.

5. A domestic gas alarm leak alarm apparatus characterised in that, The device comprises a domestic gas alarm and a gas meter connected to the domestic gas alarm, the domestic gas alarm comprising a domestic gas alarm leak alarm circuit according to any one of claims 1 to 4.

Images