Alarm device with various prompting functions of sound, light and time

Abstract

The utility model relates to the technical field of fire fighting, and provides an alarm device with various prompting functions of sound, light and time, which comprises a main control module, a timing module, a fire alarm lamp strip module, a no-in lamp strip module and a buzzer module, the main control module is electrically connected with the timing module, the fire alarm lamp strip module, the no-entry lamp strip module and the buzzer module, and the main control module is used for sending a control signal; the timing module is used for countdown of fire extinguishing starting; the fire alarm lamp strip module is used for warning through a fire alarm indicator lamp; the no-entry lamp strip module is used for warning through a no-entry indicator lamp; and the buzzer module is used for sound warning. The main control module is responsible for sending control signals, the timing module is used for fire extinguishing start countdown, the fire alarm lamp strip module and the non-entry lamp strip module are used for warning through indicator lamps respectively, the buzzer module is used for sound warning, multiple alarm functions are integrated, and installation simplification and centralized display of fire alarm information are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire extinguishing, in particular to an alarm device with multiple prompt functions of sound, light and time. Background Technique

[0002] At present, the energy storage design specification requires that energy storage containers must be equipped with a fire extinguishing system, and different alarm prompt methods are required at different fire alarm stages. The conventional method is to use a fire alarm bell to emit a mechanical impact sound for the first-level fire alarm; for the second-level fire alarm, an audible and visual alarm is used to emit an electronic alarm sound and a flashing alarm, and the fire alarm controller panel displays the countdown for starting fire extinguishing; when the countdown ends, the third-level fire alarm is started, that is, the fire extinguishing agent is sprayed; during the fire extinguishing stage, the "Do not enter when discharging" warning light flashes bright text prompts. The prior art uses 4 different fire-fighting devices (fire alarm bell, audible and visual alarm, fire alarm controller, do not enter when discharging light) to realize the alarm prompt of the fire-fighting system. Multiple devices will increase the installation difficulty and the system failure rate will also increase. Each device needs to be installed, wired, connected and tested separately.

[0003] Chinese Patent with Publication No. CN115337576A discloses an energy storage container fire extinguishing system and its control method. When an abnormality occurs, an audible and visual alarm is used for alarm. However, the audible and visual alarm of this fire extinguishing system is connected to the control system through a signal transmission line, which requires real-time monitoring in the background and cannot centrally display fire alarm information. Content of the Utility Model

[0004] In view of this, the utility model provides an alarm device with multiple prompt functions of sound, light and time, including a main control module, a timing module, a fire alarm light strip module, a do not enter light strip module and a buzzer module. The main control module is responsible for sending control signals. The timing module is used for the countdown of starting fire extinguishing. The fire alarm light strip module and the do not enter light strip module are respectively warned through indicator lights. The buzzer module is used for sound warning. By integrating multiple alarm functions, the technical effect of simplifying installation and centrally displaying fire alarm information is achieved, and the problem of unable to centrally display fire alarm information is solved.

[0005] The technical solution of the utility model is realized as follows: An alarm device with multiple prompt functions of sound, light and time, the device includes a main control module, a timing module, a fire alarm light strip module, a do not enter light strip module and a buzzer module;

[0006] The main control module is electrically connected to the timing module, the fire alarm light strip module, the do not enter light strip module and the buzzer module respectively, and the main control module is used for sending control signals;

[0007] The timing module is used for the countdown of starting fire extinguishing;

[0008] The fire alarm strip module is used to give an alarm through a fire alarm indicator light;

[0009] The do not enter strip module is used to give an alarm through a do not enter indicator light;

[0010] The buzzer module is used for sound alarm.

[0011] Based on the above technical solutions, preferably, the main control module includes a main control board U1 and a fuse FU1;

[0012] Pin 1 of the main control board U1 is connected to the VCC voltage, pin 2 of the main control board U1 is grounded, pin 3 of the main control board U1 is electrically connected to one end of the fuse FU1, and pin 4 of the main control board U1 is electrically connected to the other end of the fuse FU1.

[0013] Based on the above technical solutions, preferably, the timing module includes a timing chip U2, a crystal oscillator Y1, and a countdown display screen;

[0014] Pin 1 and pin 2 of the timing chip U2 are respectively electrically connected to both ends of the countdown display screen, pin 3 of the timing chip U2 is electrically connected to one end of the crystal oscillator Y1, pin 4 of the timing chip U2 is electrically connected to the other end of the crystal oscillator Y1, pin 5 of the timing chip U2 is respectively electrically connected to pin 5 and pin 6 of the main control board U1, pin 6 of the timing chip U2 is electrically connected to pin 4 of the main control board U1, and pin 7 of the timing chip U2 is electrically connected to pin 3 of the main control board U1.

[0015] Based on the above technical solutions, preferably, the fire alarm strip module includes a triode Q1, a three-terminal adjustable shunt reference source IC1, light-emitting diodes D1 - D3, a capacitor C1, a polarized capacitor C2, and resistors R1 - R2;

[0016] One end of the resistor R1, the positive pole of the polarized capacitor C2, and the collector of the triode Q1 are all electrically connected to pin 13 of the main control board U1. The other end of the resistor R1 is respectively electrically connected to the base of the triode Q1, one end of the capacitor C1, and the cathode of the three-terminal adjustable shunt reference source IC1. The other end of the capacitor C1 is respectively electrically connected to the emitter of the triode Q1, one end of the resistor R2, and the reference terminal of the three-terminal adjustable shunt reference source IC1. The other end of the resistor R2 is respectively electrically connected to the anode of the three-terminal adjustable shunt reference source IC1 and the positive pole of the light-emitting diode D1. The negative pole of the light-emitting diode D1 is electrically connected to the positive pole of the light-emitting diode D2. The negative pole of the light-emitting diode D2 is electrically connected to the positive pole of the light-emitting diode D3. The negative pole of the light-emitting diode D3 and the negative pole of the polarized capacitor C2 are both electrically connected to pin 12 of the main control board U1.

[0017] Based on the above technical solutions, preferably, the no-entry light strip module includes a triode Q2, a three-terminal adjustable shunt reference source IC2, light-emitting diodes D4 - D6, a capacitor C3, a polarized capacitor C4, and resistors R3 - R4;

[0018] One end of resistor R3, the positive pole of polarized capacitor C4, and the collector of triode Q2 are all electrically connected to pin 11 of the main control board U1. The other end of resistor R3 is respectively electrically connected to the base of triode Q2, one end of capacitor C3, and the cathode of three-terminal adjustable shunt reference source IC2. The other end of capacitor C3 is respectively electrically connected to the emitter of triode Q2, one end of resistor R4, and the reference terminal of three-terminal adjustable shunt reference source IC2. The other end of resistor R4 is respectively electrically connected to the anode of three-terminal adjustable shunt reference source IC2 and the positive pole of light-emitting diode D4. The negative pole of light-emitting diode D4 is electrically connected to the positive pole of light-emitting diode D5. The negative pole of light-emitting diode D5 is electrically connected to the positive pole of light-emitting diode D6. The negative pole of light-emitting diode D6 and the negative pole of polarized capacitor C4 are both electrically connected to pin 10 of the main control board U1.

[0019] Based on the above technical solutions, preferably, the buzzer module includes a buzzer BZ1, a triode Q22, a diode D7, a resistor R7, and a resistor R52;

[0020] The emitter of triode Q22 is electrically connected to pin 9 of the main control board U1. The base of triode Q22 is electrically connected to one end of resistor R52. The other end of resistor R52 is electrically connected to pin 8 of the main control board U1. The collector of triode Q22 is electrically connected to one end of resistor R7. The other end of resistor R7 is respectively electrically connected to pin 1 of buzzer BZ1 and the negative pole of diode D7. Pin 2 of buzzer BZ1 and the positive pole of diode D7 are both electrically connected to pin 7 of the main control board U1.

[0021] Based on the above technical solutions, preferably, the timing module includes a time setting knob device, and the twisting angle of the knob of the time setting knob device is proportional to the timing time.

[0022] Based on the above technical solutions, preferably, the timing chip U2 uses a microcontroller of model MSP430F412IPM.

[0023] Based on the above technical solutions, preferably, both the triode Q1 and the triode Q2 use NPN bipolar junction transistors of model S8050.

[0024] Based on the above technical solutions, preferably, both the three-terminal adjustable shunt reference source IC1 and the three-terminal adjustable shunt reference source IC2 use three-terminal voltage regulators of model TL431.

[0025] An alarm device with multiple prompting functions of sound, light and time provided by the utility model has the following beneficial effects compared with the prior art:

[0026] (1) The main control module is responsible for sending control signals, the timing module is used for the countdown before fire extinguishing start, the fire alarm light strip module and the no-entry light strip module are respectively warned through indicator lights, and the buzzer module is used for sound warning. By integrating multiple alarm functions, the installation is simplified and the fire alarm information is centrally displayed;

[0027] (2) Through the time setting knob device of the timing module, the flexible adjustment of the countdown time before fire extinguishing start is realized. According to the fact that the angle of turning the knob is proportional to the timing time, the operator can conveniently adjust the countdown time, improving the flexibility of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a structural diagram of an alarm device with multiple prompting functions of sound, light and time according to the present utility model;

[0030] Figure 2 It is a circuit wiring diagram of an alarm device with multiple prompting functions of sound, light and time according to the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0032] Please refer to Figure 1 , this embodiment provides an alarm device with multiple prompting functions of sound, light and time. The device includes a main control module, a timing module, a fire alarm light strip module, a no-entry light strip module and a buzzer module;

[0033] The main control module is electrically connected to the timing module, the fire alarm light strip module, the no-entry light strip module and the buzzer module respectively, and the main control module is used for sending control signals;

[0034] The timing module is used for the countdown of fire extinguishing start;

[0035] The fire alarm light strip module is used for warning through the fire alarm indicator;

[0036] The do not enter light strip module is used for warning through the do not enter indicator;

[0037] The buzzer module is used for sound warning.

[0038] Specifically, an alarm device with multiple prompting functions of sound, light, and time in this embodiment is responsible for sending control signals through the main control module. The timing module is used for the countdown of fire extinguishing start. The fire alarm light strip module and the do not enter light strip module respectively give warnings through the indicators, and the buzzer module is used for sound warning. By integrating multiple alarm functions, it simplifies the installation and centrally displays the fire alarm information.

[0039] The main control module includes a main control board U1 and a fuse FU1;

[0040] Pin 1 of the main control board U1 is connected to the VCC voltage, pin 2 of the main control board U1 is grounded, pin 3 of the main control board U1 is electrically connected to one end of the fuse FU1, and pin 4 of the main control board U1 is electrically connected to the other end of the fuse FU1.

[0041] Specifically, in this embodiment, by integrating multiple alarm functions, the device can centrally display various fire alarm information, including countdown, fire alarm indication, do not enter warning, etc., at one place, improving the concentration and readability of the information.

[0042] The timing module includes a timing chip U2, a crystal oscillator Y1, and a countdown display screen;

[0043] Pin 1 and pin 2 of the timing chip U2 are respectively electrically connected to both ends of the countdown display screen. Pin 3 of the timing chip U2 is electrically connected to one end of the crystal oscillator Y1, pin 4 of the timing chip U2 is electrically connected to the other end of the crystal oscillator Y1, pin 5 of the timing chip U2 is respectively electrically connected to pin 5 and pin 6 of the main control board U1, pin 6 of the timing chip U2 is electrically connected to pin 4 of the main control board U1, and pin 7 of the timing chip U2 is electrically connected to pin 3 of the main control board U1.

[0044] The timing module includes a time setting knob device, and the twisting angle of the knob of the time setting knob device is proportional to the timing time.

[0045] The timing chip U2 uses a microcontroller of model MSP430F412IPM.

[0046] Specifically, the timing module in this embodiment is used for the countdown before fire extinguishing activation, and can accurately display the remaining time before the fire extinguishing system is activated. As an integral part of the entire alarm device, the timing module is integrated with other modules, simplifying the installation process.

[0047] The timing module includes a time setting knob device, which can adjust the countdown time as needed. The angle of rotation of the knob is proportional to the timing time.

[0048] In a specific embodiment, the time setting knob device has seven gears from 0 to 6. The countdown time corresponding to each gear is equal to the corresponding gear number multiplied by 5 seconds. For example, if it is rotated to 3 using a flat-blade screwdriver, the countdown starts from 3 * 5 seconds, which is 15 seconds, and counts down to 0 seconds.

[0049] The MSP430F412IPM microcontroller is used as the timing chip, and with the crystal oscillator, it can achieve high-precision timing function. It includes a countdown display screen, which can intuitively display the remaining time. The timing chip is connected to the main control board by multiple pins, and can receive control signals and feedback the timing status.

[0050] As part of the entire alarm device, the information of the timing module can be centrally displayed together with the information of other modules, improving the visibility of the information.

[0051] The fire alarm light strip module includes a triode Q1, a three-terminal adjustable shunt reference source IC1, light-emitting diodes D1 - D3, a capacitor C1, a polarized capacitor C2, and resistors R1 - R2;

[0052] One end of the resistor R1, the positive electrode of the polarized capacitor C2, and the collector of the triode Q1 are all electrically connected to the pin 13 of the main control board U1. The other end of the resistor R1 is respectively electrically connected to the base of the triode Q1, one end of the capacitor C1, and the cathode of the three-terminal adjustable shunt reference source IC1. The other end of the capacitor C1 is respectively electrically connected to the emitter of the triode Q1, one end of the resistor R2, and the reference terminal of the three-terminal adjustable shunt reference source IC1. The other end of the resistor R2 is respectively electrically connected to the anode of the three-terminal adjustable shunt reference source IC1 and the positive electrode of the light-emitting diode D1. The negative electrode of the light-emitting diode D1 is electrically connected to the positive electrode of the light-emitting diode D2. The negative electrode of the light-emitting diode D2 is electrically connected to the positive electrode of the light-emitting diode D3. The negative electrode of the light-emitting diode D3 and the negative electrode of the polarized capacitor C2 are both electrically connected to the pin 12 of the main control board U1.

[0053] Both the triode Q1 and the triode Q2 are NPN bipolar transistors of model S8050.

[0054] Both the three-terminal adjustable shunt reference source IC1 and the three-terminal adjustable shunt reference source IC2 are three-terminal voltage regulators of model TL431.

[0055] Specifically, the fire alarm strip module in this embodiment realizes the warning function of the fire alarm indicator through light-emitting diodes D1-D3, which can intuitively display the fire alarm status. As an integral part of the entire alarm device, the fire alarm strip module is integrated with other modules, simplifying the installation process.

[0056] By using components such as triode Q1, three-terminal adjustable shunt reference source IC1, capacitors, and resistors to form a stable drive circuit, the reliability of the indicator operation is improved. It includes multiple light-emitting diodes (D1-D3) and can achieve multi-level or multi-zone fire alarm indication.

[0057] The fire alarm strip module has multiple pin connections with the main control board U1, can receive control signals and achieve different indication effects. Using light-emitting diodes as indicators has lower power consumption compared to traditional bulbs.

[0058] As part of the entire alarm device, the information of the fire alarm strip module can be centrally displayed together with the information of other modules, improving the visibility of the information.

[0059] The fire alarm strip module is connected to an external plastic shell printed with the word "Fire Alarm" in red. When the fire alarm strip module lights up, the external printed word "Fire Alarm" in red also becomes highlighted.

[0060] The no-entry strip module includes triode Q2, three-terminal adjustable shunt reference source IC2, light-emitting diodes D4-D6, capacitor C3, polarized capacitor C4, and resistors R3-R4.

[0061] One end of resistor R3, the positive pole of polarized capacitor C4, and the collector of triode Q2 are all electrically connected to pin 11 of the main control board U1. The other end of resistor R3 is respectively electrically connected to the base of triode Q2, one end of capacitor C3, and the cathode of three-terminal adjustable shunt reference source IC2. The other end of capacitor C3 is respectively electrically connected to the emitter of triode Q2, one end of resistor R4, and the reference terminal of three-terminal adjustable shunt reference source IC2. The other end of resistor R4 is respectively electrically connected to the anode of three-terminal adjustable shunt reference source IC2 and the positive pole of light-emitting diode D4. The negative pole of light-emitting diode D4 is electrically connected to the positive pole of light-emitting diode D5. The negative pole of light-emitting diode D5 is electrically connected to the positive pole of light-emitting diode D6. The negative poles of light-emitting diode D6 and polarized capacitor C4 are both electrically connected to pin 10 of the main control board U1.

[0062] Specifically, the no-entry strip module in this embodiment realizes the warning function of the no-entry indicator through light-emitting diodes (D4-D6), which can intuitively display the no-entry status and remind people not to enter the dangerous area during the fire extinguishing stage.

[0063] The Do Not Enter Light Strip Module, as part of the alarm device, is integrated with other modules, reducing the installation complexity and the number of devices required. It uses components such as transistor Q2, three-terminal adjustable shunt reference source IC2, capacitors, and resistors to form a stable drive circuit, ensuring the reliability of the indicator light under various working conditions.

[0064] The Do Not Enter Light Strip Module contains multiple light-emitting diodes (D4 - D6), which can achieve multi-level or multi-region Do Not Enter indications, enhancing the warning effect.

[0065] The Do Not Enter Light Strip Module has multiple pin connections with the main control board U1, can receive control signals and achieve different indication effects, ensuring the coordinated operation of the system.

[0066] Using light-emitting diodes as indicator lights, compared with traditional bulbs, it has lower power consumption and extends the service life of the device.

[0067] As part of the entire alarm device, the information of the Do Not Enter Light Strip Module can be centrally displayed together with the information of other modules, improving the visibility of information and the integrity of the system.

[0068] As mentioned above, the Do Not Enter Light Strip Module is connected to an external plastic shell printed with the words "Do Not Enter" in red. When the Do Not Enter Light Strip Module lights up, the externally printed words "Do Not Enter" in red also become highlighted.

[0069] The buzzer module includes buzzer BZ1, transistor Q22, diode D7, resistor R7, and resistor R52;

[0070] The emitter of transistor Q22 is electrically connected to pin 9 of the main control board U1. The base of transistor Q22 is electrically connected to one end of resistor R52. The other end of resistor R52 is electrically connected to pin 8 of the main control board U1. The collector of transistor Q22 is electrically connected to one end of resistor R7. The other end of resistor R7 is respectively electrically connected to pin 1 of buzzer BZ1 and the cathode of diode D7. Pin 2 of buzzer BZ1 and the anode of diode D7 are both electrically connected to pin 7 of the main control board U1.

[0071] Specifically, the buzzer module of this embodiment emits a sound warning through buzzer BZ1, which can effectively alert personnel to pay attention to a fire or other emergency situations. The buzzer module, as part of the alarm device, is integrated with other modules, reducing the installation complexity and the number of devices required.

[0072] The module uses components such as transistor Q22, diode D7, resistors R7 and R52 to form a stable drive circuit, ensuring the reliability of the buzzer under various working conditions.

[0073] An efficient circuit design is adopted to ensure that the buzzer has a low power consumption when emitting a warning sound, extending the service life of the device. As part of the entire alarm device, the information of the buzzer module can be centrally displayed together with the information of other modules, improving the visibility of information and the integrity of the system.

[0074] Specifically, the working control logic of an alarm device with various prompting functions of sound, light, and time in this embodiment is as follows:

[0075] There are two groups of terminal blocks, both of which can work under a DC 24V voltage. The positive and negative poles of terminal 1 control the activation of the "buzzer" and the "fire alarm" indicator light. When there is a 24V voltage, the "buzzer" sounds continuously and the "fire alarm" flashes. It is used to replace the primary fire alarm signal in the existing solution.

[0076] The positive and negative poles of terminal 2 control the activation of the "Do Not Enter" light and the 30-second delay light. When there is a 24V voltage, the "Do Not Enter" light flashes and the 30-second countdown starts. It is used to replace the secondary fire alarm signal in the existing solution.

[0077] When the 30-second countdown ends, the "fire alarm" and "Do Not Enter" lights change from flashing to constant on. It is used to replace the tertiary fire alarm signal in the existing solution.

[0078] The above is only the preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An alarm device with multiple prompting functions including sound, light and time, characterized in that: The device includes a main control module, a timing module, a fire alarm light strip module, a keep-out light strip module and a buzzer module; The main control module is electrically connected to the timing module, the fire alarm light strip module, the keep-out light strip module and the buzzer module respectively, and the main control module is used to send a control signal; The timing module is used for the countdown of fire extinguishing start; The fire alarm light strip module is used to give an alarm through a fire alarm indicator light; The keep-out light strip module is used to give warnings through a keep-out indicator light; The buzzer module is used for sound warning.

2. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 1, characterized in that: The main control module includes a main control board U1 and a fuse FU1; Pin 1 of the main control board U1 is connected to the VCC voltage, pin 2 of the main control board U1 is grounded, pin 3 of the main control board U1 is electrically connected to one end of the fuse FU1, and pin 4 of the main control board U1 is electrically connected to the other end of the fuse FU1.

3. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 2, characterized in that: The timing module includes a timing chip U2, a crystal oscillator Y1, and a countdown display screen; Pin 1 and pin 2 of the timing chip U2 are electrically connected to the two ends of the countdown display screen respectively, pin 3 of the timing chip U2 is electrically connected to one end of the crystal oscillator Y1, pin 4 of the timing chip U2 is electrically connected to the other end of the crystal oscillator Y1, pin 5 of the timing chip U2 is electrically connected to pin 5 and pin 6 of the main control board U1 respectively, pin 6 of the timing chip U2 is electrically connected to pin 4 of the main control board U1, and pin 7 of the timing chip U2 is electrically connected to pin 3 of the main control board U1.

4. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 3, characterized in that: The fire alarm light strip module includes a transistor Q1, a three-terminal adjustable shunt reference source IC1, light-emitting diodes D1-D3, a capacitor C1, a polar capacitor C2, and resistors R1-R2; One end of the resistor R1, the positive electrode of the polarity capacitor C2 and the collector of the transistor Q1 are all electrically connected to the pin 13 of the main control board U1, the other end of the resistor R1 is respectively electrically connected to the base of the transistor Q1, one end of the capacitor C1 and the cathode of the three-terminal adjustable shunt reference source IC1, the other end of the capacitor C1 is respectively electrically connected to the emitter of the transistor Q1, one end of the resistor R2 and the reference end of the three-terminal adjustable shunt reference source IC1, the other end of the resistor R2 is respectively electrically connected to the anode of the three-terminal adjustable shunt reference source IC1 and the positive electrode of the light-emitting diode D1, the negative electrode of the light-emitting diode D1 is electrically connected to the positive electrode of the light-emitting diode D2, the negative electrode of the light-emitting diode D2 is electrically connected to the positive electrode of the light-emitting diode D3, the negative electrode of the light-emitting diode D3 and the negative electrode of the polarity capacitor C2 are both electrically connected to the pin 12 of the main control board U1.

5. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 4, characterized in that: The do not enter the light strip module includes a transistor Q2, a three-terminal adjustable shunt reference source IC2, light emitting diodes D4-D6, a capacitor C3, a polar capacitor C4, and resistors R3-R4; One end of the resistor R3, the positive electrode of the polarity capacitor C4 and the collector of the transistor Q2 are all electrically connected to the pin 11 of the main control board U1, the other end of the resistor R3 is respectively electrically connected to the base of the transistor Q2, one end of the capacitor C3 and the cathode of the three-terminal adjustable shunt reference source IC2, the other end of the capacitor C3 is respectively electrically connected to the emitter of the transistor Q2, one end of the resistor R4 and the reference end of the three-terminal adjustable shunt reference source IC2, the other end of the resistor R4 is respectively electrically connected to the anode of the three-terminal adjustable shunt reference source IC2 and the positive electrode of the light-emitting diode D4, the negative electrode of the light-emitting diode D4 is electrically connected to the positive electrode of the light-emitting diode D5, the negative electrode of the light-emitting diode D5 is electrically connected to the positive electrode of the light-emitting diode D6, the negative electrode of the light-emitting diode D6 and the negative electrode of the polarity capacitor C4 are both electrically connected to the pin 10 of the main control board U1.

6. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 5, characterized in that: The buzzer module includes a buzzer BZ1, a transistor Q22, a diode D7, a resistor R7, and a resistor R52; The emitter of the transistor Q22 is electrically connected to pin 9 of the main control board U1, the base of the transistor Q22 is electrically connected to one end of the resistor R52, the other end of the resistor R52 is electrically connected to pin 8 of the main control board U1, the collector of the transistor Q22 is electrically connected to one end of the resistor R7, the other end of the resistor R7 is electrically connected to pin 1 of the buzzer BZ1 and the negative electrode of the diode D7 respectively, and the pin 2 of the buzzer BZ1 and the positive electrode of the diode D7 are both electrically connected to pin 7 of the main control board U1.

7. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 6, characterized in that: The timing module comprises a time setting knob device, and the knob twisting angle of the time setting knob device is proportional to the timing time.

8. The alarm device with multiple prompting functions of sound, light and time as claimed in claim 7, characterized in that: The timing chip U2 adopts a microcontroller of model MSP430F412IPM.

9. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 8, characterized in that: The transistor Q1 and the transistor Q2 are both NPN transistors of model S8050.

10. An alarm device with multiple prompting functions of sound, light and time as claimed in claim 9, characterized in that: The three-terminal adjustable shunt reference source IC1 and the three-terminal adjustable shunt reference source IC2 both use a three-terminal voltage regulator tube of model TL431.

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