An electrical fire detector
By introducing arc detection module, arc counting module and timing control module into the electrical fire detector, the problem of inability to protect power outage in the prior art is solved, and higher fire prevention and control effects and safety of power equipment are achieved.
Patent Information
- Application Number
- CN202421549122.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-03
- Publication Date
- 2025-04-11
- Estimated Expiration
- 2034-07-03
AI Technical Summary
Existing electrical fire detectors cannot provide power outage protection in advance based on the arc status, and the fire judgment method is poor, which poses certain safety hazards.
An electrical fire detector is designed, including an arc detection module, an arc counting module, a timing control module, etc. By detecting the arc state, counting the number of arc occurrences, or setting the timing time, the control protection control module performs power-off protection.
It realizes power outage protection based on the arc state, reduces the probability of fire occurrence and improves the safety of power equipment.
Smart Images
Figure CN222749036U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fire detectors, in particular to an electrical fire detector. Background Art
[0002] With the development of economy and the continuous improvement of people's living standards, the use of various electrical equipment is increasing. When the power pressure is large, the probability of electrical fire is greatly increased. In order to avoid the occurrence of electrical fires caused by arcs due to poor contact of switches when the switches are closed and opened, the electrical fire detectors in the prior art generally use photosensitive sensors for arc detection, and when serious arc phenomena occur, that is, when open flames or smoke appear, power-off protection is performed to avoid the occurrence of fire. It is impossible to perform power-off protection in advance according to the state of the arc, the fire judgment method is poor, and there are certain safety hazards, so it needs to be improved. Utility Model Content
[0003] The embodiment of the utility model provides an electrical fire detector to solve the problems raised in the above background technology.
[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:
[0005] An electrical fire detector comprises: a power supply module, a protection control module, an output control module, an arc detection module, a self-reset control module, an arc counting module, an electric energy control module and a timing control module;
[0006] A power module is used to receive AC power, rectify, filter and stabilize the AC power and output working power, and is used to control the transmission state of the working power;
[0007] A protection control module, connected to the power module, the output control module, the arc counting module and the timing control module, for transmitting the received working power to the output control module, and stopping the transmission of the working power when receiving a first protection signal output by the arc counting module or a second protection signal output by the timing control module;
[0008] An output control module, used for receiving the working electric energy transmitted by the protection control module and supplying power to the connected electric equipment;
[0009] An arc detection module is connected to the power module, and is used to receive working power and perform arc detection through a light sensing element, and output a first detection signal when an arc is detected;
[0010] A self-reset control module, connected to the power module, configured to output a first reset signal and stop outputting the first reset signal after receiving working power;
[0011] An arc counting module, connected to the self-resetting control module and the arc detection module, for counting the input first detection signal, and outputting a first protection signal when the number of received first detection signals reaches a set number limit, and performing a reset operation when receiving a first reset signal;
[0012] An electric energy control module, connected to the power supply module, the arc detection module and the timing control module, and configured to transmit the working electric energy to the timing control module upon receiving the first detection signal or the second protection signal output by the timing control module;
[0013] The timing control module is used to set the timing time, and when receiving the working power transmitted by the power control module, it starts the timing work, and after the timing ends, it continuously outputs the second protection signal.
[0014] As a further solution of the utility model: the power module includes a power interface, a first rectifier, a first capacitor, a second capacitor, a first voltage stabilizer and a second key switch; the protection control module includes a first relay switch; the output control module includes a first key switch and an output port;
[0015] Preferably, the first end of the power interface is connected to the first end of the first rectifier and the first moving end of the first relay switch, the second end of the power interface is connected to the second end of the first rectifier and the second moving end of the first relay switch, the first static end and the second static end of the first relay switch are respectively connected to the first moving end and the second moving end of the first push switch, the first static end and the second static end of the first push switch are respectively connected to the first end and the second end of the output port, the third end of the first rectifier is connected to the third end of the first voltage regulator and one end of the first capacitor, the second end of the first voltage regulator is connected to the moving end of the second push switch and one end of the second capacitor, the static end of the second push switch is connected to the self-reset control module, and the other end of the second capacitor, the first end of the first voltage regulator, the other end of the first capacitor and the fourth end of the first rectifier are all grounded.
[0016] As a further solution of the utility model: the arc detection module includes a first photosensitive sensor, a first potentiometer, a first switch tube, a first resistor and a fourth diode;
[0017] Preferably, one end of the first photosensor is connected to the static end of the second push switch and the collector of the first switch tube, the other end of the first photosensor is connected to the base of the first switch tube, one end of the first potentiometer and the slider end of the first potentiometer, the emitter of the first switch tube is connected to the anode of the fourth diode and connected to the other end of the first potentiometer and the ground through the first resistor, and the cathode of the fourth diode is connected to the protection control module.
[0018] As a further solution of the utility model: the arc counting module includes a second switch tube, a second resistor, a first counter and a first diode; the protection control module also includes a third switch tube and a first relay;
[0019] Preferably, the emitter of the second switch tube is connected to the R terminal of the first counter and grounded through the second resistor, the VDD terminal of the first counter is connected to the collector of the second switch tube, one end of the coil of the first relay and the static end of the second key switch, the VSS terminal, Q0 terminal, Q1 terminal and Q2 terminal of the first counter are all grounded, the Q3 terminal of the first counter is connected to the anode of the first diode, the cathode of the first diode is connected to the base of the third switch tube, the emitter of the third switch tube is grounded, the collector of the third switch tube is connected to the other end of the coil of the first relay, and the CP terminal of the first counter is connected to the emitter of the first switch tube.
[0020] As a further solution of the utility model: the power control module includes a third resistor, a first power tube and a fourth switch tube;
[0021] Preferably, the gate of the first power tube is connected to the collector of the fourth switch tube and the static end of the second key switch and the source of the first power tube are connected through the third resistor, the drain of the first power tube is connected to the timing control module, the emitter of the fourth switch tube is grounded, and the base of the fourth switch tube is connected to the cathode of the fourth diode.
[0022] As a further solution of the utility model: the timing control module includes a first timer, a fourth capacitor, a third capacitor, a fourth resistor, a second diode, a third diode and a fifth diode;
[0023] Preferably, the eighth end and the fourth end of the first timer are both connected to the drain of the first power tube and connected to the sixth end of the first timer, the second end of the first timer, one end of the fourth resistor and the cathode of the second diode through the third capacitor, the fifth end of the first timer is grounded through the fourth capacitor, the first end of the first timer, the other end of the fourth resistor and the anode of the second diode are all grounded, the third end of the first timer is connected to the anode of the third diode and the anode of the fifth diode, the cathode of the third diode is connected to the base of the third switch tube, and the cathode of the fifth diode is connected to the base of the fourth switch tube.
[0024] As a further solution of the utility model: the self-reset control module includes a fifth resistor, a first power supply, a first optical coupler, a fifth resistor, a sixth resistor, a fifth capacitor, a fifth switch tube, a seventh resistor and a sixth diode;
[0025] Preferably, the first end of the first optocoupler is connected to the static end of the second push switch through the fifth resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected to the first power supply and the emitter of the fifth switch tube, the fourth end of the first optocoupler is connected to one end of the fifth resistor and one end of the fifth capacitor and is connected to the base of the fifth switch tube through the sixth resistor, the collector of the fifth switch tube is connected to the anode of the sixth diode and one end of the seventh resistor, the cathode of the sixth diode is connected to the base of the second switch tube, and the other end of the fifth resistor, the other end of the fifth capacitor and the other end of the seventh resistor are all grounded.
[0026] Compared with the prior art, the beneficial effects of the utility model are as follows: the electrical fire detector of the utility model detects the switch arc state of the output control module by the arc detection module when the power supply module is powered, and the arc counting module records the number of arc occurrences in the output control module. If the number of arc occurrences exceeds the set number limit, the arc counting module will directly control the protection control module to perform power-off protection, or when the arc occurrence time exceeds the timing time set by the timing control module, the timing control module will control the protection control module to perform power-off protection, and then the power-off protection can be performed in advance according to the state of the arc, thereby reducing the probability of fire and improving the safety of electrical equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments of the utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0028] Figure 1 The present invention provides a schematic block diagram of an electrical fire detector.
[0029] Figure 2 The present invention provides a circuit diagram of an electrical fire detector.
[0030] Figure 3 This is a connection circuit diagram of a self-resetting control module provided by an example of the utility model. DETAILED DESCRIPTION
[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In one embodiment, see Figure 1 , an electrical fire detector, comprising: a power supply module 1, a protection control module 2, an output control module 3, an arc detection module 4, a self-reset control module 5, an arc counting module 6, an electric energy control module 7 and a timing control module 8;
[0033] Specifically, the power module 1 is used to receive AC power, rectify, filter and stabilize the AC power and output working power, and is used to control the transmission state of the working power;
[0034] The protection control module 2 is connected to the power module 1, the output control module 3, the arc counting module 6 and the timing control module 8, and is used to transmit the received working power to the output control module 3, and stop transmitting the working power when receiving the first protection signal output by the arc counting module 6 or the second protection signal output by the timing control module 8;
[0035] An output control module 3 is used to receive the working power transmitted by the protection control module 2 and supply power to the connected electrical equipment;
[0036] An arc detection module 4 is connected to the power module 1 and is used to receive working power and perform arc detection through a light sensing element, and output a first detection signal when an arc is detected;
[0037] A self-reset control module 5, connected to the power module 1, configured to output a first reset signal, and stop outputting the first reset signal after receiving working power;
[0038] The arc counting module 6 is connected to the self-resetting control module 5 and the arc detection module 4, and is used to count the input first detection signal, and output the first protection signal when the number of received first detection signals reaches the set number limit, and perform a reset operation when the first reset signal is received;
[0039] The power control module 7 is connected to the power module 1, the arc detection module 4 and the timing control module 8, and is used to transmit the working power to the timing control module 8 when receiving the first detection signal or the second protection signal output by the timing control module 8;
[0040] The timing control module 8 is used to set the timing time, and start the timing work when receiving the working power transmitted by the power control module 7, and continuously output the second protection signal after the timing ends.
[0041] In a specific embodiment, the power supply module 1 may adopt a power supply circuit composed of a power supply interface, a rectifier, a voltage stabilizer, a push button switch, etc., which may be connected to AC power and perform rectification, filtering, voltage stabilization and power supply control on the AC power; the protection control module 2 may adopt a protection control circuit composed of relays, transistors and relay switches, which may control the transmission state of electric energy; the output control module 3 may adopt an output control circuit composed of a push button switch and an output port, which receives the electric energy transmitted by the protection control module 2 and controls the transmission of electric energy to supply power to the connected electrical equipment; the arc detection module 4 may adopt an arc detection circuit composed of a photosensitive sensor, a resistor, a transistor, etc., and the photosensitive sensor may select a SGLUX ultraviolet photodiode, which may detect the arc state when the push button switch in the output control module 3 is closed and opened; the self-reset control Module 5 can adopt a self-resetting control circuit composed of a photoelectric coupler, a resistor, a transistor, etc., and can reset the arc counting module 6 when the power supply module 1 starts to supply power; the above-mentioned arc counting module 6 can adopt an arc counting circuit composed of a counter, a resistor, a transistor, etc., and can count and process the high-level state signal output by the arc detection module 4, and control the operation of the protection control module 2 after the count reaches the set number limit; the above-mentioned power control module 7 can adopt a power control circuit composed of a transistor, a resistor and a power tube, and can control the transmission state of power; the above-mentioned timing control module 8 can adopt a timing control circuit composed of a timer, a resistor, a capacitor, etc., and can set the timing time, and when powered on, it can output a low-level state signal at a fixed time, and continuously output a high-level state signal when the timing ends and the power is on.
[0042] In another embodiment, see Figure 1 , Figure 2 and Figure 3 The power module 1 includes a power interface, a first rectifier T1, a first capacitor C1, a second capacitor C2, a first voltage regulator IC1 and a second key switch S2; the protection control module 2 includes a first relay switch K1-1; the output control module 3 includes a first key switch S1 and an output port;
[0043] Specifically, the first end of the power interface is connected to the first end of the first rectifier T1 and the first moving end of the first relay switch K1-1, the second end of the power interface is connected to the second end of the first rectifier T1 and the second moving end of the first relay switch K1-1, the first static end and the second static end of the first relay switch K1-1 are respectively connected to the first moving end and the second moving end of the first key switch S1, the first static end and the second static end of the first key switch S1 are respectively connected to the first end and the second end of the output port, the third end of the first rectifier T1 is connected to the third end of the first voltage regulator IC1 and one end of the first capacitor C1, the second end of the first voltage regulator IC1 is connected to the moving end of the second key switch S2 and one end of the second capacitor C2, the static end of the second key switch S2 is connected to the self-reset control module 5, and the other end of the second capacitor C2, the first end of the first voltage regulator IC1, the other end of the first capacitor C1 and the fourth end of the first rectifier T1 are all grounded.
[0044] In a specific embodiment, the first voltage regulator IC1 can be a 7805 voltage regulator; the first push switch S1 can be a double-pole double-throw switch, which can be manually controlled to close; the second push switch S2 can be a single-pole switch, which can be manually controlled to close; the first relay switch K1-1 can be a double-pole double-throw normally closed switch.
[0045] Furthermore, the arc detection module 4 includes a first photosensor RG1, a first potentiometer RP1, a first switch tube V1, a first resistor R1 and a fourth diode D4;
[0046] Specifically, one end of the first photosensor RG1 is connected to the static end of the second push switch S2 and the collector of the first switch tube V1, the other end of the first photosensor RG1 is connected to the base of the first switch tube V1, one end of the first potentiometer RP1 and the slider end of the first potentiometer RP1, the emitter of the first switch tube V1 is connected to the anode of the fourth diode D4 and is connected to the other end of the first potentiometer RP1 and the ground through the first resistor R1, and the cathode of the fourth diode D4 is connected to the protection control module 2.
[0047] In a specific embodiment, the first photosensor RG1 may be a SGLUX ultraviolet photodiode. When the bright light generated by the arc is detected, the first photosensor RG1 is turned on. The first switch tube V1 may be an NPN transistor.
[0048] Furthermore, the arc counting module 6 includes a second switch tube V2, a second resistor R2, a first counter IC2 and a first diode D1; the protection control module 2 also includes a third switch tube V3 and a first relay K1;
[0049] Specifically, the emitter of the second switch tube V2 is connected to the R terminal of the first counter IC2 and is grounded through the second resistor R2, the VDD terminal of the first counter IC2 is connected to the collector of the second switch tube V2, one end of the coil of the first relay K1 and the static end of the second key switch S2, the VSS terminal, Q0 terminal, Q1 terminal and Q2 terminal of the first counter IC2 are all grounded, the Q3 terminal of the first counter IC2 is connected to the anode of the first diode D1, the cathode of the first diode D1 is connected to the base of the third switch tube V3, the emitter of the third switch tube V3 is grounded, the collector of the third switch tube V3 is connected to the other end of the coil of the first relay K1, and the CP terminal of the first counter IC2 is connected to the emitter of the first switch tube V1.
[0050] In a specific embodiment, the first counter IC2 may use a CD4017 chip. After a high-level signal is input to its CP terminal, it will perform counting and output high-level signals from the Q0 terminal, Q1 terminal, Q2 terminal and Q3 terminal in sequence. The second switch tube V2 may use an NPN transistor to control the potential of the R terminal of the first counter IC2, and then control the reset of the first counter IC2. The first relay K1 controls the opening or closing of the first relay switch K1-1 by magnetic attraction.
[0051] Furthermore, the power control module 7 includes a third resistor R3, a first power tube Q1 and a fourth switch tube V4;
[0052] Specifically, the gate of the first power tube Q1 is connected to the collector of the fourth switch tube V4 and connected to the static end of the second key switch S2 and the source of the first power tube Q1 through the third resistor R3, the drain of the first power tube Q1 is connected to the timing control module 8, the emitter of the fourth switch tube V4 is grounded, and the base of the fourth switch tube V4 is connected to the cathode of the fourth diode D4.
[0053] In a specific embodiment, the first power tube Q1 may be a P-channel field effect tube; and the fourth switch tube V4 may be an NPN transistor.
[0054] Further, the timing control module 8 includes a first timer IC3, a fourth capacitor C4, a third capacitor C3, a fourth resistor R4, a second diode D2, a third diode D3 and a fifth diode D5;
[0055] Specifically, the eighth end and the fourth end of the first timer IC3 are both connected to the drain of the first power tube Q1 and connected to the sixth end of the first timer IC3, the second end of the first timer IC3, one end of the fourth resistor R4 and the cathode of the second diode D2 through the third capacitor C3. The fifth end of the first timer IC3 is grounded through the fourth capacitor C4. The first end of the first timer IC3, the other end of the fourth resistor R4 and the anode of the second diode D2 are all grounded. The third end of the first timer IC3 is connected to the anode of the third diode D3 and the anode of the fifth diode D5. The cathode of the third diode D3 is connected to the base of the third switch tube V3, and the cathode of the fifth diode D5 is connected to the base of the fourth switch tube V4.
[0056] In a specific embodiment, the first timer IC3 may use a NE555 chip, and cooperate with a third capacitor C3, a fourth capacitor C4, a fourth resistor R4 and a second diode D2 to perform timing work. Specifically, after the first timer IC3 is powered on, it outputs a low-level signal at a fixed time. When the timing ends and the first timer IC3 remains powered on, the first timer IC3 will continue to output a high-level signal.
[0057] Furthermore, the self-reset control module 5 includes an eighth resistor R8, a first power supply VCC1, a first optical coupler J1, a fifth resistor R5, a sixth resistor R6, a fifth capacitor C5, a fifth switch tube V5, a seventh resistor R7 and a sixth diode D6;
[0058] Specifically, the first end of the first optocoupler J1 is connected to the static end of the second key switch S2 through the eighth resistor R8, the second end of the first optocoupler J1 is grounded, the third end of the first optocoupler J1 is connected to the first power supply VCC1 and the emitter of the fifth switch tube V5, the fourth end of the first optocoupler J1 is connected to one end of the fifth resistor R5 and one end of the fifth capacitor C5 and is connected to the base of the fifth switch tube V5 through the sixth resistor R6, the collector of the fifth switch tube V5 is connected to the anode of the sixth diode D6 and one end of the seventh resistor R7, the cathode of the sixth diode D6 is connected to the base of the second switch tube V2, and the other end of the fifth resistor R5, the other end of the fifth capacitor C5 and the other end of the seventh resistor R7 are all grounded.
[0059] In a specific embodiment, the first optocoupler J1 may be a PC817 photocoupler; the fifth switch tube V5 may be a PNP transistor, the base voltage of the fifth switch tube V5 is pulled down by the fifth resistor R5 and the sixth resistor R6, and the base voltage of the fifth switch tube V5 is increased by the fifth capacitor C5 through energy storage.
[0060] In an electrical fire detector of the present embodiment, AC power is connected to the power interface, and the first rectifier T1, the first capacitor C1, the first voltage regulator IC1 and the second capacitor C2 perform rectification, filtering and voltage stabilization. The fifth switch tube V5 is turned on due to the grounding of the fifth resistor R5 and the sixth resistor R6, triggering the second switch tube V2 to turn on. At this time, the first counter IC2 is in a reset state. When the second key switch S2 is pressed, the first optical coupler J1 is turned on, the fifth capacitor C5 starts to store energy, and after the stored voltage reaches a certain value, the fifth switch tube V5 is turned off, and the first counter IC2 stops resetting and starts counting. When the first key switch S1 is closed or disconnected, the generated arc will be detected by the first photosensor RG1, and when the first photosensor RG1 detects the arc, the first switch tube V1 is turned on, so that the CP terminal of the first counter IC2 becomes a high level, and then the Q0 terminal of the first counter IC2 outputs a high level. When the first photosensor RG1 detects an arc for the fourth time, the Q3 terminal of the first counter IC2 outputs a high level, controls the third switch tube V3 to be turned on, the first relay K1 is energized and controls the first relay switch K1-1 to be turned off. Since the first photosensor RG1 continuously detects an arc, the first switch tube V1 is turned on, which will trigger the fourth switch tube V4 to be turned on, the first power tube Q1 to be turned on, the first timer IC3 is energized, and the fourth capacitor C4, the third capacitor C3, the fourth resistor R4 and the second diode D2 are used to set the timing time and perform the timing work. When the continuous conduction time of the first switch tube V1 exceeds the set timing time, the first timer IC3 will output a high level signal, control the fourth switch tube V4 to be turned on, and then keep the first power tube Q1 turned on, keep the first timer IC3 powered, and at the same time control the third switch tube V3 to be turned on, control the first relay switch K1-1 to be turned off, and perform power-off protection.
[0061] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
[0062] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An electrical fire detector, characterized in that: The electrical fire detector comprises: a power supply module, a protection control module, an output control module, an arc detection module, a self-reset control module, an arc counting module, an electric energy control module and a timing control module; The power supply module is used to receive AC power, rectify, filter and stabilize the AC power and output working power, and is used to control the transmission state of the working power; The protection control module is connected to the power supply module, the output control module, the arc counting module and the timing control module, and is used to transmit the received working power to the output control module, and stop transmitting the working power when receiving the first protection signal output by the arc counting module or the second protection signal output by the timing control module; The output control module is used to receive the working power transmitted by the protection control module and supply power to the connected electrical equipment; The arc detection module is connected to the power supply module, and is used to receive working power and perform arc detection through a light sensing element, and output a first detection signal when an arc is detected; The self-reset control module is connected to the power supply module and is used to output a first reset signal, and stop outputting the first reset signal after receiving working power; The arc counting module is connected to the self-resetting control module and the arc detection module, and is used to count the input first detection signal, and output a first protection signal when the number of received first detection signals reaches a set number limit, and perform a reset operation when receiving a first reset signal; The power control module is connected to the power supply module, the arc detection module and the timing control module, and is used to transmit the working power to the timing control module when receiving the first detection signal or the second protection signal output by the timing control module; The timing control module is used to set the timing time, and when receiving the working power transmitted by the power control module, starts the timing work, and after the timing ends, continuously outputs the second protection signal.
2. An electrical fire detector according to claim 1, characterized in that: The power module includes a power interface, a first rectifier, a first capacitor, a second capacitor, a first voltage stabilizer and a second key switch; the protection control module includes a first relay switch; the output control module includes a first key switch and an output port; The first end of the power interface is connected to the first end of the first rectifier and the first moving end of the first relay switch, the second end of the power interface is connected to the second end of the first rectifier and the second moving end of the first relay switch, the first static end and the second static end of the first relay switch are respectively connected to the first moving end and the second moving end of the first key switch, the first static end and the second static end of the first key switch are respectively connected to the first end and the second end of the output port, the third end of the first rectifier is connected to the third end of the first voltage regulator and one end of the first capacitor, the second end of the first voltage regulator is connected to the moving end of the second key switch and one end of the second capacitor, the static end of the second key switch is connected to the self-reset control module, and the other end of the second capacitor, the first end of the first voltage regulator, the other end of the first capacitor and the fourth end of the first rectifier are all grounded.
3. An electrical fire detector according to claim 2, characterized in that: The arc detection module includes a first photosensor, a first potentiometer, a first switch tube, a first resistor and a fourth diode; One end of the first photosensor is connected to the static end of the second push switch and the collector of the first switch tube, the other end of the first photosensor is connected to the base of the first switch tube, one end of the first potentiometer and the slider end of the first potentiometer, the emitter of the first switch tube is connected to the anode of the fourth diode and connected to the other end of the first potentiometer and the ground through the first resistor, and the cathode of the fourth diode is connected to the protection control module.
4. An electrical fire detector according to claim 3, characterized in that: The arc counting module includes a second switch tube, a second resistor, a first counter and a first diode; the protection control module also includes a third switch tube and a first relay; The emitter of the second switch tube is connected to the R end of the first counter and grounded through the second resistor, the VDD end of the first counter is connected to the collector of the second switch tube, one end of the coil of the first relay and the static end of the second key switch, the VSS end, Q0 end, Q1 end and Q2 end of the first counter are all grounded, the Q3 end of the first counter is connected to the anode of the first diode, the cathode of the first diode is connected to the base of the third switch tube, the emitter of the third switch tube is grounded, the collector of the third switch tube is connected to the other end of the coil of the first relay, and the CP end of the first counter is connected to the emitter of the first switch tube.
5. An electrical fire detector according to claim 4, characterized in that: The power control module includes a third resistor, a first power tube and a fourth switch tube; The gate of the first power tube is connected to the collector of the fourth switch tube and is connected to the static end of the second key switch and the source of the first power tube through the third resistor. The drain of the first power tube is connected to the timing control module. The emitter of the fourth switch tube is grounded. The base of the fourth switch tube is connected to the cathode of the fourth diode.
6. An electrical fire detector according to claim 5, characterized in that: The timing control module includes a first timer, a fourth capacitor, a third capacitor, a fourth resistor, a second diode, a third diode and a fifth diode; The eighth end and the fourth end of the first timer are both connected to the drain of the first power tube and connected to the sixth end of the first timer, the second end of the first timer, one end of the fourth resistor and the cathode of the second diode through the third capacitor, the fifth end of the first timer is grounded through the fourth capacitor, the first end of the first timer, the other end of the fourth resistor and the anode of the second diode are all grounded, the third end of the first timer is connected to the anode of the third diode and the anode of the fifth diode, the cathode of the third diode is connected to the base of the third switch tube, and the cathode of the fifth diode is connected to the base of the fourth switch tube.
7. An electrical fire detector according to claim 4, characterized in that: The self-reset control module includes an eighth resistor, a first power supply, a first optical coupler, a fifth resistor, a sixth resistor, a fifth capacitor, a fifth switch tube, a seventh resistor and a sixth diode; The first end of the first optocoupler is connected to the static end of the second push switch through the eighth resistor, the second end of the first optocoupler is grounded, the third end of the first optocoupler is connected to the first power supply and the emitter of the fifth switch tube, the fourth end of the first optocoupler is connected to one end of the fifth resistor and one end of the fifth capacitor and is connected to the base of the fifth switch tube through the sixth resistor, the collector of the fifth switch tube is connected to the anode of the sixth diode and one end of the seventh resistor, the cathode of the sixth diode is connected to the base of the second switch tube, and the other end of the fifth resistor, the other end of the fifth capacitor and the other end of the seventh resistor are all grounded.