Control circuit for forcibly exhausting natural gas and device using same

Abstract

The invention relates to a control circuit for forcibly exhausting natural gas and a device applying the circuit. The control circuit comprises a control chip U4, wherein the eighth pin of the control chip U4 is connected with a key T1; the fan control circuit is connected with a ninth pin of the control chip U4 and a fan; and the transmitting circuit and the receiving circuit are respectively connected with the control chip U4 and are used for transmitting and receiving wireless signals. The device applying the control circuit comprises a shell, wherein the control circuit, a battery, and a terminal, a switch button, a pairing button and a charging connector which are integrated on the control circuit are arranged in the shell. The core of the invention lies in that remote alarm is realized through the transmitting circuit and the receiving circuit, and in cooperation with the flexible shell structure design, the problems of fixed controller position and lack of remote response capability in the prior art are solved. The method has the following specific effects: 1) mobile phone linkage control and natural gas leakage alarm are realized; and 2) the shell can be quickly mounted and the battery can be disassembled without tools through the wall-mounted groove and the battery clamping piece with the elastic fixing part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of exhaust fan controller used in kitchen, in particular to a control circuit for strong exhaust of natural gas and a device using the same. BACKGROUND

[0002] In self-built houses and kitchens without preset flues, exhaust fans are the key equipment to ensure air circulation. The traditional exhaust fan controller has the following defects: Functional limitations: only physical key switch control is supported, and remote alarm cannot be realized. When the user is not in the kitchen (such as in the early stage of natural gas leakage), the user has difficulty in learning in time, and there is a major safety hazard; Installation rigidity: the controller needs to be fixedly installed at a specific position on the wall, and cannot be flexibly moved according to the actual use environment (such as change of gas stove position, temporary need to adjust exhaust direction), resulting in reduced exhaust efficiency; System closedness: lack of interaction with intelligent terminals, unable to remotely monitor the state or receive alarms through mobile phones and other devices, and no battery power detection, fault prompt and other protection functions are integrated. SUMMARY

[0003] The purpose of the present application is to provide a control circuit for strong exhaust of natural gas and a device using the same, to solve the problems of fixed position of the controller and lack of remote alarm capability in the prior art, and to overcome the deficiencies in the prior art.

[0004] A control circuit for strong exhaust of natural gas designed according to the purpose comprises: A control chip U4, the 8-pin of the control chip U4 is connected with a key T1; A fan control circuit, the fan control circuit is connected with the 9-pin of the control chip U4; A transmitting circuit and a receiving circuit, the transmitting circuit and the receiving circuit are respectively connected to the control chip U4, and the transmitting circuit and the receiving circuit are respectively used for transmitting signals and receiving signals.

[0005] Specifically further, the 9-pin of the control chip U4 is connected to the fan control circuit 800, the fan control circuit 800 includes the fifth field effect tube Q5, the FAN_BEF end, the fourth diode D4, the fan joint J4, the FAN_ON / TCK end, the twenty-second resistance R22, the seventh capacitor C7 and the BAT+12V end, the FAN_BEF end is connected with the S pole of the fifth field effect tube Q5, the D pole of the fifth field effect tube Q5 is connected with the fourth diode D4, the fourth diode D4 is connected with the 1-pin of the fan joint J4, the fifth field effect tube Q5 is connected with the twenty-second resistance R22, the twenty-second resistance R22 is connected with the FAN_ON / TCK end, the FAN_BEF end is connected with the 9-pin of the control chip U4, the FAN_ON / TCK end is connected with the 5-pin of the control chip U4, the D pole of the fifth field effect tube Q5 is connected with the 2-pin of the fan joint J4, and the fan joint J4 is connected with the fan.

[0006] Specifically further, the transmitting circuit 1100 includes the first antenna T4, the transmitting chip U3, the first patch crystal oscillator T2, the 315_3V3 end and the 315M_DATA end, the first antenna T4 is connected with the 1-pin, the 2-pin and the 3-pin of the transmitting chip U3 respectively, the 315_3V3 end is connected with the 5-pin of the transmitting chip U3, the 315M_DATA end is connected with the 4-pin of the transmitting chip U3, the 315M_DATA end is connected with the seventeenth resistance R17, the seventeenth resistance R17 is connected with the 7-pin of the control chip U4, and the first patch crystal oscillator T2 is connected with the 6-pin of the transmitting chip U3.

[0007] Specifically further, the receiving circuit 1200 includes the second antenna T5, the receiving chip U2, the second patch crystal oscillator T3, the third field effect tube Q3, the POWER_ON end, the 433M_DATA end and the sixteenth resistance R16, the second antenna T5 is connected with the receiving chip U2, the second patch crystal oscillator T3 is connected with the 8-pin of the receiving chip U2, the D pole of the third field effect tube Q3 is connected with the 6-pin of the receiving chip U2, the G pole of the third field effect tube Q3 is connected with the POWER_ON end, one end of the 433M_DATA end is connected with the 5-pin of the receiving chip U2, the other end of the 433M_DATA end is connected with the sixteenth resistance R16, and the sixteenth resistance R16 is connected with the 4-pin of the control chip U4.

[0008] Further, the 13th pin of the control chip U4 is connected with a USB plug circuit, which comprises a USB plug J1, a DC12V end, a first capacitor C1, a second diode D2, a third resistor R3, a first resistor R1 and a DC5V-DET end. The two ends of the first capacitor C1 are connected to the 1st pin and the 2nd pin of the USB plug J1 respectively. The DC12V end is connected to the common end between the first capacitor C1 and the 1st pin of the USB plug J1. The DC12V end is connected with the second diode D2. The second diode D2 is connected with one end of the third resistor R3. The other end of the third resistor R3 is connected to the common end between the first resistor R1 and the DC5V-DET end. The DC5V-DET end is connected to the 13th pin of the control chip U4.

[0009] Further, the 12th pin of the control chip U4 is connected with a charging circuit 200, which comprises a CHRG-IN end, a charging chip U1, a DC12V end, a second field effect transistor Q2, a first inductor L1, a ninth resistor R9 and a second charging plug J2. The CHRG-IN end is connected to the 3rd pin of the charging chip U1. The DC12V end is connected to the 9th pin of the charging chip U1 and the drain of the second field effect transistor Q2 respectively. The gate of the second field effect transistor Q2 is connected to the 10th pin of the charging chip U1. The 7th pin and the 8th pin of the charging chip U1 are connected to the two ends of the ninth resistor R9 respectively. The ninth resistor R9 is connected with the first inductor L1. The other end of the first inductor L1 is connected to the collector of the second field effect transistor Q2. The ninth resistor R9 is connected with the second charging plug J2. The second charging plug J2 is connected with a charging battery.

[0010] Further, the BAT-AD voltage division detection circuit 300 comprises a first field effect transistor Q1, a twelfth resistor R12, an eleventh resistor R11, a ninth resistor R9, a fifth resistor R5, a BAT+ end and a POWER-ON end. The G pole of the first field effect transistor Q1 is connected with the ninth resistor R9 and the fifth resistor R5 respectively. The ninth resistor R9 is connected with the POWER-ON end. The POWER-ON end is connected to the 11th pin of the control chip U4. The D pole of the first field effect transistor Q1, the twelfth resistor R12, the eleventh resistor R11 and the BAT+ end are connected in series. The common end of the twelfth resistor R12 and the eleventh resistor R11 is connected with a fourth capacitor C4 and a BAT-DET end respectively. The BAT-DET end is connected to the 10th pin of the control chip U4.

[0011] Further, the first power supply circuit 400 includes a second voltage reduction chip IC2, a BAT+12V terminal and a VDD5V terminal, the 3th pin and the 4th pin of the second voltage reduction chip IC2 are connected to the VDD5V terminal, and the BAT+12V terminal is connected to the 2nd pin of the second voltage reduction chip IC2; and the second power supply circuit 1000 includes a first voltage reduction chip IC1 and a 315_3V3 terminal, the 315_3V3 terminal is connected to the 3rd pin and the 4th pin of the first voltage reduction chip IC1, the BAT+12V terminal of the second voltage reduction chip IC2 is connected to the 2nd pin of the first voltage reduction chip IC1, and the VDD5V terminal is connected to the 1st pin of the control chip U4.

[0012] Further, the auxiliary connection circuit 500 includes a VDD5V terminal, a FAN-ON / TCK terminal, a DIO terminal and a third joint J3, the VDD5V terminal, the FAN-ON / TCK terminal and the DIO terminal are connected to the third joint J3, the DIO terminal is connected to the 6th pin of the control chip U4, the FAN-ON / TCK terminal is connected to the 5th pin of the control chip U4, and the third joint J3 is connected with an exhaust fan.

[0013] Further, the auxiliary circuit 600 includes a second field effect transistor Q2, a third diode D3, a DC12V terminal, a second resistor R2, a BAT+ terminal and a BAT+12V terminal, the third diode D3 is connected to the 3rd pin of the second field effect transistor Q2, the third diode D3 is connected to the DC12V terminal, the DC12V terminal is connected to the 1st pin of the second field effect transistor Q2, the 1st pin of the second field effect transistor Q2 is connected to the second resistor R2, the BAT+12V terminal is connected to the common terminal between the 3rd pin of the second field effect transistor Q2 and the third diode D3, and the BAT+12V terminal is connected to the 2nd pin of the first voltage reduction chip IC1 of the second power supply circuit 1000.

[0014] Further, the control chip U4 is connected with a buzzer circuit 700, the buzzer circuit 700 includes a buzzer, a buzzer joint H1, a fourth triode Q4, a second twenty-third resistor R23, a VDD5V terminal, a second twenty-fourth resistor R24, a second twenty-fifth resistor R25 and a SPK terminal, the buzzer is connected to the buzzer joint H1, the VDD5V terminal is connected to the second twenty-third resistor R23, the second twenty-third resistor R23 is connected to the 1st pin of the buzzer joint H1, the SPK terminal is connected to the second twenty-fourth resistor R24, one end of the second twenty-fourth resistor R24 is connected to the second twenty-third resistor R23, the common terminal between the second twenty-fourth resistor R24 and the second twenty-third resistor R23 is connected to the base of the fourth triode Q4, the collector of the fourth triode Q4 is connected to the 2nd pin of the buzzer joint H1, the VDD5V terminal is connected to the 1st pin of the control chip U4, and the SPK terminal is connected to the 16th pin of the control chip U4.

[0015] Specifically further, the control chip U4 is connected with an indication circuit, the indication circuit comprises an LEDR end, an LEDG end, a twenty-first resistor R21, a twentieth resistor R20 and an LED group D5, the LEDR end is connected with the twenty-first resistor R21, the LEDG end is connected with the twentieth resistor R20, and the other ends of the twenty-first resistor R21 and the twentieth resistor R20 are connected with the 1st pin and the 2nd pin of the LED group D5 respectively.

[0016] The application discloses a control device for forced exhaust of natural gas, which comprises a shell and a control circuit arranged in the shell.

[0017] Specifically further, the shell comprises a front shell and a back plate connected with each other, a battery and a control circuit are fixedly arranged on the front side wall surface of the back plate, the control circuit is integrated with a wiring terminal, a switch key, a matching key and a charging connector, the battery is arranged on the control circuit, and the wiring terminal is used for electrically connecting with an exhaust fan.

[0018] Specifically further, the battery and the control circuit are arranged at intervals left and right, fixed clamping pieces are arranged at intervals left and right on the front side wall surface of the back plate, and a plug-in fixing space is formed between the two fixed clamping pieces, and the battery is fixedly plugged into the plug-in fixing space.

[0019] Specifically further, an elastic fixing part is arranged on the wall surface of the fixed clamping piece facing the battery.

[0020] Specifically further, a matching key hole is arranged on the front surface of the front shell, and the switch key is movably arranged in the matching key hole.

[0021] Specifically further, a switch key hole and a terminal wiring hole are arranged on the upper surface of the front shell respectively, the wiring terminal is arranged in the terminal wiring hole, and the switch key extends outward through the switch key hole.

[0022] Specifically further, a charging port is arranged on the lower surface of the front shell, and the charging connector is arranged in the charging port.

[0023] Specifically further, wall hanging grooves are arranged on the rear side wall surface of the back plate left and right respectively.

[0024] Specifically further, the back plate and the front shell are connected with each other through a buckle structure. Compared with the prior art, the application overcomes the core defects of the prior art, and has the following specific effects: Through the dual-frequency wireless communication architecture, the smart phone remote warning is supported, and the sudden gas leakage can be responded to in time;

[0025] The dual-band design avoids signal failure caused by interference from a single frequency band.

[0026] 2. Multiple state feedback mechanism: The buzzer circuit provides an acoustic alarm; the LED indicator circuit displays the running / charging status in real time, ensuring that users can remotely understand the working conditions of the equipment. 3. Flexible Deployment and Structural Innovation

[0027] The wall-mounted slot allows for quick installation, and the elastic fixing part allows for tool-free battery removal and installation, solving the pain point of traditional controllers with fixed positions. 4. Circuit-mechanical coordinated optimization: The terminal blocks support quick plugging and unplugging, adapting to different exhaust fan models; the independent charging connector is separated from the switch button to avoid accidental operation.

[0028] The BAT-AD voltage divider detection circuit 300 monitors the battery voltage in real time and triggers low-battery protection via the control chip U4. The dual-stage power supply architecture (the first power supply circuit 400 steps down to 5V, and the second power supply circuit 1000 steps down to 3.3V) matches the voltage requirements of different chips and reduces energy consumption.

[0029] The fourth diode in the fan control circuit prevents current backflow; each functional circuit achieves clock synchronization through the first chip crystal oscillator T2 and the first chip crystal oscillator T3 to improve communication stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a circuit diagram of a USB plug of the present invention.

[0031] Figure 2 It is a charging circuit diagram of the present invention.

[0032] Figure 3 This is a BAT-AD voltage division detection circuit diagram of the present invention.

[0033] Figure 4 This is the first power supply circuit diagram of the present invention.

[0034] Figure 5 This is the auxiliary connection circuit diagram of the present invention.

[0035] Figure 6 This is the circuit diagram of the control chip of the present invention.

[0036] Figure 7 This is a charging auxiliary circuit diagram of the present invention.

[0037] Figure 8 This is a buzzer circuit diagram of the present invention.

[0038] Figure 9 This is a fan control circuit diagram of the present invention.

[0039] Figure 10 It is an indicating circuit diagram of the present invention.

[0040] Figure 11 This is a second power supply circuit diagram of the present invention.

[0041] Figure 12 This is a transmission circuit diagram of the present invention.

[0042] Figure 13 This is a receiving circuit diagram of the present invention.

[0043] Figure 14 It is a schematic diagram of the shell structure of the present invention.

[0044] Figure 15 for Figure 14 Schematic diagram of the rear view structure.

[0045] Figure 16 for Figure 14 Schematic diagram of the decomposition structure.

[0046] The following are marked in the figure: USB plug circuit 100, charging circuit 200, BAT-AD voltage division detection circuit 300, first power supply circuit 400, auxiliary connection circuit 500, charging auxiliary circuit 600, buzzer circuit 700, fan control circuit 800, indication circuit 900, second power supply circuit 1000, transmitting circuit 1100, receiving circuit 1200, housing 1300, front housing 1301, plug-in fixing space 1302, pairing button hole 1303, back panel 1304, wall-mounting slot 1305, battery 1306, fixing clip 1307, wiring terminal 1308, switch button 1309, control circuit 1310, charging connector 1311, pairing button 1312, elastic fixing portion 1313. DETAILED DESCRIPTION

[0047] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0048] See also Figures 1 to 13 A control circuit for protecting against natural gas leakage includes a control board, which further includes: The control chip U4 has a key T1 connected to its pin 8; the key T1 is used to start the control chip U4 and implement the switch function.

[0049] The fan control circuit 800 is connected to the 9th pin of the control chip U4; the working state of the fan is controlled by the fan control circuit 800; The transmitting circuit 1100 and the receiving circuit 1200 are connected to the control chip U4, and are used for transmitting signals and receiving signals respectively.

[0050] The circuit establishes a bidirectional data link with a smart terminal through a heterogeneous dual-frequency wireless communication architecture (i.e., the transmitting circuit 1100 works at a 315 MHz frequency band and the receiving circuit 1200 works at a 433 MHz frequency band), and specifically realizes: Remote control mechanism: the transmitting circuit 1100 transmits the state signals (including a gas leakage alarm code and device working condition data) generated by the control chip U4 to the smart terminal through the first antenna T4; The receiving circuit 1200 acquires the control instructions issued by the smart terminal through the second antenna T5, and the control instructions are fed back to the input control chip U4; Safety linkage response: when the control system APP (existing technology) of the smart terminal issues an exhaust instruction, the control chip U4 drives the exhaust fan to start through the fan control circuit 800 within ≤100 ms; the actual communication distance is ≥50 m (in a through-wall environment), and the response delay is reduced by 98% compared with physical button control.

[0051] The following content further describes the above circuit: As shown in Figure 9 The 9-pin of the control chip U4 in the circuit is connected to the fan control circuit 800, which includes the fifth field effect tube Q5, the FAN_BEF end, the fourth diode D4, the fan connector J4, the FAN_ON / TCK end, the twenty-second resistor R22, the seventh capacitor C7 and the BAT+12V end. The FAN_BEF end is connected to the S pole of the fifth field effect tube Q5, the D pole of the fifth field effect tube Q5 is connected to the fourth diode D4, the fourth diode D4 is connected to the 1-pin of the fan connector J4, the fifth field effect tube Q5 is connected to the twenty-second resistor R22, the twenty-second resistor R22 is connected to the FAN_ON / TCK end, the FAN_BEF end is connected to the 9-pin of the control chip U4, the FAN_ON / TCK end is connected to the 5-pin of the control chip U4, the D pole of the fifth field effect tube Q5 is connected to the 2-pin of the fan connector J4, and the fan connector J4 is connected to the fan. When the control chip U4 controls the G pole of the fifth field effect tube Q5 to make it conductive, the fan connector J4 is powered by 12V voltage, and the fan is powered on and started. Among them, the fourth diode D4 implements the function of one-way conduction, and cooperates with the seventh capacitor C7 to increase the stability of the whole.

[0052] As shown in Figure 12As shown, the transmitting circuit 1100 described in this circuit includes a first antenna T4, a transmitting chip U3, a first chip crystal oscillator T2, a 315_3V3 terminal, and a 315M_DATA terminal. The first antenna T4 is connected to pins 1, 2, and 3 of the transmitting chip U3, respectively. The 315_3V3 terminal is connected to pin 5 of the transmitting chip U3, and the 315M_DATA terminal is connected to pin 4 of the transmitting chip U3. The 315M_DATA terminal is connected to a seventeenth resistor R17, which is connected to pin 7 of the control chip U4. The first chip crystal oscillator T2 is connected to pin 6 of the transmitting chip U3. The first chip crystal oscillator T2 provides a basic clock signal for the system. Typically, a system shares a single crystal oscillator to facilitate synchronization between components. Some communication systems use different crystal oscillators for the baseband and radio frequency, maintaining synchronization through electronic frequency adjustment. Crystal oscillators are often used in conjunction with a phase-locked loop circuit to provide the required clock frequency for the system. The control chip U4 communicates with the communication module of the smartphone via the transmitter chip U3, transmitting the information about the overall circuit usage status. The first antenna T4 can perform remote transmission.

[0053] like Figure 13 As shown, the receiving circuit 1200 described in this circuit includes a second antenna T5, a receiving chip U2, a second SMD crystal oscillator T3, a third field-effect transistor Q3, a POWER_ON terminal, a 433M_DATA terminal, and a sixteenth resistor R16. The second antenna T5 is connected to the receiving chip U2, the second SMD crystal oscillator T3 is connected to pin 8 of the receiving chip U2, the D terminal of the third field-effect transistor Q3 is connected to pin 6 of the receiving chip U2, the G terminal of the third field-effect transistor Q3 is connected to the POWER_ON terminal, one end of the 433M_DATA terminal is connected to pin 5 of the receiving chip U2, and the other end of the 433M_DATA terminal is connected to the sixteenth resistor R16, which is connected to pin 4 of the control chip U4. The function of the second SMD crystal oscillator T3 is to provide a basic clock signal for the system. Typically, a system shares a single crystal oscillator to facilitate synchronization between components. Some communication systems use different crystal oscillators for the baseband and radio frequency, and maintain synchronization through electronic frequency adjustment. A crystal oscillator is typically used in conjunction with a phase-locked loop circuit to provide the clock frequency required by the system. The second antenna T5 and receiver chip U2 are combined to receive operating signals and communicate with the smartphone's communication module.

[0054] like Figure 1As shown, the 13-pin of the control chip U4 is connected with the USB plug circuit 100, which includes the USB plug J1, DC12V terminal, the first capacitor C1, the second diode D2, the third resistor R3, the first resistor R1 and the DC5V-DET terminal. The two ends of the first capacitor C1 are connected to the 1-pin and 2-pin of the USB plug J1 respectively, the DC12V terminal is connected to the common terminal between the first capacitor C1 and the 1-pin of the USB plug J1, the DC12V terminal is connected with the second diode D2, the second diode D2 is connected with one end of the third resistor R3, the other end of the third resistor R3 is connected to the common terminal between the first resistor R1 and the DC5V-DET terminal, and the DC5V-DET terminal is connected to the 13-pin of the control chip U4. The USB plug J1 is used for inputting 12V / 3.5A to implement power supply to the charging circuit 200.

[0055] As shown, Figure 2 As shown, the 13-pin of the control chip U4 is connected with the USB plug circuit 100, which includes the USB plug J1, DC12V terminal, the first capacitor C1, the second diode D2, the third resistor R3, the first resistor R1 and the DC5V-DET terminal. The two ends of the first capacitor C1 are connected to the 1-pin and 2-pin of the USB plug J1 respectively, the DC12V terminal is connected to the common terminal between the first capacitor C1 and the 1-pin of the USB plug J1, the DC12V terminal is connected with the second diode D2, the second diode D2 is connected with one end of the third resistor R3, the other end of the third resistor R3 is connected to the common terminal between the first resistor R1 and the DC5V-DET terminal, and the DC5V-DET terminal is connected to the 13-pin of the control chip U4. The USB plug J1 is used for inputting 12V / 3.5A to implement power supply to the charging circuit 200.

[0056] As shown, Figure 3As shown in the figure, the circuit further comprises a BAT-AD voltage division detection circuit 300 including a first field effect transistor Q1, a twelfth resistor R12, an eleventh resistor R11, a ninth resistor R9, a fifth resistor R5, a BAT+ terminal and a POWER-ON terminal. The G terminal of the first field effect transistor Q1 is connected with the ninth resistor R9 and the fifth resistor R5 respectively. The ninth resistor R9 is connected with the POWER-ON terminal. The POWER-ON terminal is connected with the 11 pin of the control chip U4. The D terminal of the first field effect transistor Q1, the twelfth resistor R12, the eleventh resistor R11 and the BAT+ terminal are connected in series. The common terminal of the twelfth resistor R12 and the eleventh resistor R11 is connected with a fourth capacitor C4 and a BAT-DET terminal respectively. The BAT-DET terminal is connected with the 10 pin of the control chip U4. The BAT+ terminal of the BAT-AD voltage division detection circuit 300 detects the voltage of the second charging terminal J2 of the charging circuit 200.

[0057] As shown in the figure, Figure 4 and Figure 11 As shown in the figure, the circuit further comprises a first power supply circuit 400 and a second power supply circuit 1000. The first power supply circuit 400 includes a second voltage reduction chip IC2, a BAT+12V terminal and a VDD5V terminal. The 3 pin and the 4 pin of the second voltage reduction chip IC2 are commonly connected with the VDD5V terminal. The BAT+12V terminal is connected with the 2 pin of the second voltage reduction chip IC2. The second power supply circuit 1000 includes a first voltage reduction chip IC1 and a 315_3V3 terminal. The 315_3V3 terminal is connected with the 3 pin and the 4 pin of the first voltage reduction chip IC1. The BAT+12V terminal of the second voltage reduction chip IC2 is connected with the 2 pin of the first voltage reduction chip IC1. The VDD5V terminal is connected with the 1 pin of the control chip U4. The first power supply circuit 400 and the second power supply circuit 1000 can output two kinds of voltage, which are 5V and 12V respectively, and are input to the corresponding circuit respectively. For example, 5V is supplied to the control chip U4.

[0058] As shown in the figure, Figure 5 The auxiliary connection circuit 500 of the circuit includes a VDD5V terminal, a FAN-ON / TCK terminal, a DIO terminal and a third terminal J3. The VDD5V terminal, the FAN-ON / TCK terminal and the DIO terminal are connected with the third terminal J3 respectively. The DIO terminal is connected with the 6 pin of the control chip U4. The FAN-ON / TCK terminal is connected with the 5 pin of the control chip U4. The third terminal J3 is connected with an exhaust fan.

[0059] As shown in the figure, Figure 2As shown, the circuit further comprises an auxiliary circuit 600, the charging auxiliary circuit 600 comprising a second field effect tube Q2, a third diode D3, a DC 12V end, a second resistor R2, a BAT+ end and a BAT+ 12V end, the third diode D3 being connected with the 3 pin of the second field effect tube Q2, the third diode D3 being connected with the DC 12V end, the DC 12V end being connected with the 1 pin of the second field effect tube Q2, the 1 pin of the second field effect tube Q2 being connected with the second resistor R2, the BAT+ 12V end being connected with the common end between the 3 pin of the second field effect tube Q2 and the third diode D3, and the BAT+ 12V end being connected with the 2 pin of the first voltage reduction chip IC1 on the second power supply circuit 1000.

[0060] As shown, Figure 8 As shown, the control chip U4 of the circuit is connected with a buzzer circuit 700, the buzzer circuit 700 comprising a buzzer, a buzzer connector H1, a fourth triode Q4, a twenty-third resistor R23, a VDD 5V end, a twenty-fourth resistor R24, a twenty-fifth resistor R25 and an SPK end, the buzzer being connected with the buzzer connector H1, the VDD 5V end being connected with the twenty-third resistor R23, the twenty-third resistor R23 being connected with the 1 pin of the buzzer connector H1, the SPK end being connected with the twenty-fourth resistor R24, one end of the twenty-fourth resistor R24 being connected with the twenty-third resistor R23, the common end between the twenty-fourth resistor R24 and the twenty-third resistor R23 being connected with the base of the fourth triode Q4, the collector of the fourth triode Q4 being connected with the 2 pin of the buzzer connector H1, the VDD 5V end being connected with the 1 pin of the control chip U4, and the SPK end being connected with the 16 pin of the control chip U4. The buzzer circuit 700 plays a sound prompting function.

[0061] As shown, Figure 10 As shown, the control chip U4 of the circuit is connected with an indicating circuit 900, the indicating circuit 900 comprising an LEDR end, an LEDG end, a twenty-first resistor R21, a twentieth resistor R20 and an LED group D5, the LEDR end being connected with the twenty-first resistor R21, the LEDG end being connected with the twentieth resistor R20, the other ends of the twenty-first resistor R21 and the twentieth resistor R20 being connected with the 1 pin and the 2 pin of the LED group D5 respectively. The indicating circuit 900 plays a visual prompting function.

[0062] As shown, Figures 14 to 16 As shown, the application discloses a controller, comprising a shell 1300, and further comprising a control circuit arranged in the shell 1300, wherein the control circuit comprises the control circuit for protecting natural gas leakage.

[0063] Specifically further, the shell 1300 comprises a front shell 1301 and a back plate 1304 connected with each other, the front side wall surface of the back plate 1304 is fixedly provided with a battery 1306 and a control circuit 1310, the control circuit 1310 is integrated with a wiring terminal 1308, a switch button 1309, a pairing button 1312 and a charging connector 1311, the battery 1306 is placed on the control circuit 1310, and the wiring terminal 1308 is used for electrically connecting with an exhaust fan. The wiring terminal 1308 is arranged in a plug-in manner, so that the electric wire of the exhaust fan can be quickly connected, and the assembly or disassembly efficiency is improved.

[0064] Specifically further, the battery 1306 and the control circuit 1310 are arranged at left and right positions, the fixed clamping pieces 1307 are arranged at left and right positions on the front side wall surface of the back plate 1304, and the plug-in fixing space 1302 is formed between the two fixed clamping pieces 1307, and the battery 1306 is fixedly plugged into the plug-in fixing space 1302.

[0065] Specifically further, the fixed clamping piece 1307 is provided with an elastic fixing part 1313 on the wall surface facing the battery 1306. The elastic fixing part 1313 is used for being in close contact with the battery under the action of elastic deformation, and at the same time, an acting force is applied to the battery 1306, so that the battery 1306 is kept fixed in the plug-in fixing space 1302, and screw-free assembly is realized. The assembly is convenient, and the disassembly and maintenance are facilitated.

[0066] Specifically further, the front surface of the front shell 1301 is provided with a pairing button hole 1303, and the switch button 1309 is movably arranged in the pairing button hole 1303.

[0067] Specifically further, the upper surface of the front shell 1301 is respectively provided with a switch button hole and a terminal wiring hole, the wiring terminal 1308 is arranged in the terminal wiring hole, and the switch button 1309 extends outward through the switch button hole.

[0068] Specifically further, the lower surface of the front shell 1301 is provided with a charging port, and the charging connector 1311 is arranged in the charging port.

[0069] Specifically further, the rear side wall surface of the back plate 1304 is respectively provided with wall hanging grooves 1305 at left and right positions. The wall hanging grooves 1305 are used for being quickly plugged and matched with the nails installed on the wall, so that the hanging is realized, the installation is convenient, the manual operation is reduced, and the disassembly and maintenance are facilitated. Further, the back plate 1304 and the front shell 1301 are connected with each other in a buckle structure.

[0070] In the description of the application, it needs to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which are only for the purpose of facilitating the description of the application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the application. The terms "first", "second" are only for the purpose of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

Claims

1. A control circuit for forced exhaust of natural gas, characterized by: Includes: Control chip U4, pin 8 of control chip U4 is connected to button T1; The fan control circuit (800) is connected to pin 9 of the control chip U4; The transmitting circuit (1100) and the receiving circuit (1200) are connected to the control chip U4 respectively, and the transmitting circuit (1100) and the receiving circuit (1200) are used to transmit signals and receive signals respectively.

2. A control circuit for forced exhaust of natural gas according to claim 1, characterized in that: Pin 9 of the control chip U4 is connected to the fan control circuit (800), and the fan control circuit (800) includes a fifth field effect transistor Q5, a FAN_BEF terminal, a fourth diode D4, a fan connector J4, a FAN_ON / TCK terminal, a twenty-second resistor R22, a seventh capacitor C7, and a BAT+12V terminal. The FAN_BEF terminal is connected to the S pole of the fifth field effect transistor Q5, the D pole of the fifth field effect transistor Q5 is connected to the fourth diode D4, the fourth diode D4 is connected to pin 1 of the fan connector J4, the fifth field effect transistor Q5 is connected to the twenty-second resistor R22, the twenty-second resistor R22 is connected to the FAN_ON / TCK terminal, the FAN_BEF terminal is connected to pin 9 of the control chip U4, the FAN_ON / TCK terminal is connected to pin 5 of the control chip U4, the D pole of the fifth field effect transistor Q5 is connected to pin 2 of the fan connector J4, and the fan connector J4 is connected to the fan.

3. The control circuit for forced exhaust of natural gas according to claim 1 is characterized in that: The transmitting circuit (1100) comprises a first antenna T4, a transmitting chip U3, a first chip crystal oscillator T2, a 315_3V3 terminal and a 315M_DATA terminal, wherein the first antenna T4 is connected to pins 1, 2 and 3 of the transmitting chip U3 respectively, the 315_3V3 terminal is connected to pin 5 of the transmitting chip U3, the 315M_DATA terminal is connected to pin 4 of the transmitting chip U3, the 315M_DATA terminal is connected to a seventeenth resistor R17, the seventeenth resistor R17 is connected to pin 7 of the control chip U4, and the first chip crystal oscillator T2 is connected to pin 6 of the transmitting chip U3.

4. The control circuit for forced exhaust of natural gas according to claim 1, characterized in that: The receiving circuit (1200) comprises a second antenna T5, a receiving chip U2, a second chip crystal oscillator T3, a third field effect transistor Q3, a POWER_ON terminal, a 433M_DATA terminal and a sixteenth resistor R16, wherein the second antenna T5 is connected to the receiving chip U2, the second chip crystal oscillator T3 is connected to pin 8 of the receiving chip U2, the D pole of the third field effect transistor Q3 is connected to pin 6 of the receiving chip U2, the G pole of the third field effect transistor Q3 is connected to the POWER_ON terminal, one end of the 433M_DATA terminal is connected to pin 5 of the receiving chip U2, the other end of the 433M_DATA terminal is connected to the sixteenth resistor R16, and the sixteenth resistor R16 is connected to pin 4 of the control chip U4.

5. The control circuit for forced exhaust of natural gas according to claim 1, characterized in that: Pin 13 of the control chip U4 is connected to a USB plug circuit (100), the USB plug circuit (100) comprising a USB connector J1, a DC12V terminal, a first capacitor C1, a second diode D2, a third resistor R3, the first resistor R1 and a DC5V-DET terminal, the two ends of the first capacitor C1 being connected to pins 1 and 2 of the USB connector J1 respectively, the DC12V terminal being connected to a common terminal between the first capacitor C1 and pin 1 of the USB connector J1, the DC12V terminal being connected to the second diode D2, the second diode D2 being connected to one end of the third resistor R3, the other end of the third resistor R3 being connected to the first resistor R1 and the DC5V-DET terminal. The common terminal between the terminals, the DC5V-DET terminal is connected to the 13th pin of the control chip U4, the 12th pin of the control chip U4 is connected to the charging circuit (200), the charging circuit (200) comprises a CHRG-IN terminal, a charging chip U1, a DC12V terminal, a second field effect tube Q2, a first inductor L1, a ninth resistor R9 and a second charging connector J2, the CHRG-IN terminal is connected to the 3rd pin of the charging chip U1, the DC12V terminal is respectively connected to the 9th pin of the charging chip U1 and the drain of the second field effect tube Q2, the gate of the second field effect tube Q2 is connected to the 10th pin of the charging chip U1, and the 7th pin and the 8th pin of the charging chip U1 are respectively connected to the two ends of the ninth resistor R9. The ninth resistor R9 is connected to the first inductor L1, the other end of the first inductor L1 is connected to the collector of the second field effect tube Q2, the ninth resistor R9 is connected to the second charging connector J2, the second charging connector J2 is connected to the rechargeable battery, and further comprises a BAT-AD voltage dividing detection circuit (300) comprising the first field effect tube Q1, the twelfth resistor R12, the eleventh resistor R11, the ninth resistor R9, the fifth resistor R5, a BAT+ terminal and a POWER-ON terminal, the G terminal of the first field effect tube Q1 is connected to the ninth resistor R9 and the fifth resistor R5 respectively, the ninth resistor R9 is connected to the POWER-ON terminal, and the POWER-ON terminal is connected to the 11th pin of the control chip U4. The first power supply circuit (400) and the second power supply circuit (1000) are connected, the D pole of the first field effect tube Q1, the twelfth resistor R12, the eleventh resistor R11 and the BAT+ terminal are connected in series, the common terminal of the twelfth resistor R12 and the eleventh resistor R11 are respectively connected to the fourth capacitor C4 and the BAT-DET terminal, the BAT-DET terminal is connected to the 10th pin of the control chip U4, and further include a first power supply circuit (400) and a second power supply circuit (1000), the first power supply circuit (400) includes a second step-down chip IC2, a BAT+12V terminal and a VDD5V terminal, the 3rd and 4th pins of the second step-down chip IC2 are commonly connected to the VDD5V terminal, and the BAT+12V terminal is connected to the 2nd pin of the second step-down chip IC2;The second power supply circuit 1000 includes a first buck chip IC1 and a 315_3V3 terminal, the 315_3V3 terminal is connected to pins 3 and 4 of the first buck chip IC1, the BAT+12V terminal on the second buck chip IC2 is connected to pin 2 of the first buck chip IC1, and the VDD5V terminal is connected to pin 1 of the control chip U4. The second power supply circuit 1000 also includes an auxiliary connection circuit (500) including a VDD5V terminal, a FAN-ON / TCK terminal, a DIO terminal, and a third connector J3. The VDD5V terminal, the FAN-ON / TCK terminal, and the DIO terminal are respectively connected to the third connector J3. The DIO terminal is connected to pin 6 of the control chip U4, the FAN-ON / TCK terminal is connected to pin 5 of the control chip U4, and the third connector J3 is connected to an exhaust fan.

6. The control circuit for forced exhaust of natural gas according to claim 5, characterized in that: The auxiliary circuit (600) is also included. The auxiliary charging circuit (600) includes a second field effect tube Q2, a third diode D3, a DC12V terminal, a second resistor R2, a BAT+ terminal and a BAT+12V terminal. The third diode D3 is connected to the 3rd pin of the second field effect tube Q2. The third diode D3 is connected to the DC12V terminal. The DC12V terminal is connected to the 1st pin of the second field effect tube Q2. The 1st pin of the second field effect tube Q2 is connected to the second resistor R2. The BAT+12V terminal is connected to the second field effect tube Q2. The common terminal between the 3rd pin of the transistor Q2 and the third diode D3, and the BAT+12V terminal are connected to the 2nd pin of the first step-down chip IC1 on the second power supply circuit 1000. The control chip U4 is connected to a buzzer circuit (700). The buzzer circuit (700) includes a buzzer, a buzzer connector H1, a fourth transistor Q4, a twenty-third resistor R23, a VDD5V terminal, a twenty-fourth resistor R24, a twenty-fifth resistor R25 and an SPK terminal. The buzzer is connected to the buzzer connector H1. The VDD5V terminal is connected to the twenty-third resistor R23, the twenty-third resistor R23 is connected to pin 1 of the buzzer connector H1, the SPK terminal is connected to the twenty-fourth resistor R24, one end of the twenty-fourth resistor R24 ​​is connected to the twenty-third resistor R23, the common end between the twenty-fourth resistor R24 ​​and the twenty-third resistor R23 is connected to the base of the fourth transistor Q4, the collector of the fourth transistor Q4 is connected to pin 2 of the buzzer connector H1, and the VDD5V terminal is connected to pin 1 of the control chip U4. The SPK terminal is connected to the 16th pin of the control chip U4. The control chip U4 is connected to an indication circuit (900). The indication circuit (900) includes an LEDR terminal, an LEDG terminal, a 21st resistor R21, a 20th resistor R20 and an LED group D5. The LEDR terminal is connected to the 21st resistor R21, the LEDG terminal is connected to the 20th resistor R20, and the other ends of the 21st resistor R21 and the 20th resistor R20 are respectively connected to the 1st pin and the 2nd pin of the LED group D5.

7. A control device for forced exhaust of natural gas, comprising a housing (1300), characterized in that: A control circuit is provided in a housing (1300), wherein the control circuit comprises a control circuit for forced exhaust of natural gas as described in any one of claims 1 to 6.

8. The control device for forced exhaust of natural gas according to claim 7, characterized in that: The housing (1300) comprises a front housing (1301) and a back plate (1304) connected to each other. A battery (1306) and a control circuit (1310) are fixedly provided on the front side wall of the back plate (1304). The control circuit (1310) is integrated with a connection terminal (1308), a switch button (1309), a pairing button (1312), and a charging connector (1311). The battery (1306) is placed on the control circuit (1310), and the connection terminal (1308) is used for electrically connecting to an exhaust fan.

9. The control device for forced exhaust of natural gas according to claim 8, characterized in that: The battery (1306) and the control circuit (1310) are arranged at intervals on the left and right sides, and fixed clamps (1307) are arranged at intervals on the left and right sides of the front side wall of the back plate (1304). A plug-in fixing space (1302) is formed between the left and right fixed clamps (1307), and the battery (1306) is fixedly plugged into the plug-in fixing space (1302).

10. The control device for forced exhaust of natural gas according to claim 9, characterized in that: An elastic fixing portion (1313) is provided on the wall surface of the fixing clamp (1307) facing the battery (1306).

11. The control device for forced exhaust of natural gas according to claim 8, characterized in that: A pairing button hole (1303) is provided on the front surface of the front housing (1301), and the switch button (1309) is movably arranged in the pairing button hole (1303).

12. The control device for forced exhaust of natural gas according to claim 8, characterized in that: The upper surface of the front housing (1301) is provided with a switch button hole and a terminal wiring hole, respectively. The wiring terminal (1308) is provided in the terminal wiring hole, and the switch button (1309) extends outward through the switch button hole.

13. The control device for forced exhaust of natural gas according to claim 8, characterized in that: A charging port is provided on the lower surface of the front housing (1301), and the charging connector (1311) is provided in the charging port.

14. The control device for forced exhaust of natural gas according to claim 8, characterized in that: Wall hanging grooves (1305) are respectively provided on the left and right sides of the rear wall of the back plate (1304).

15. The control device for forced exhaust of natural gas according to claim 8, characterized in that: The back plate (1304) and the front shell (1301) are connected to each other using a snap-fit ​​structure.

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