Air-breathing smoke detector with over-temperature alarm function
By integrating smoke and temperature detection units into an aspirating smoke detector, utilizing high-energy LED scattering and high-precision thermistors, combined with microprocessor control, the problem of the inability to detect temperature anomalies in a timely manner in existing technologies has been solved. This enables timely fire warnings and remote monitoring, improving the comprehensiveness and accuracy of fire warnings.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-27
- Publication Date
- 2026-03-31
AI Technical Summary
Existing aspirating smoke detectors only have smoke detection capabilities and cannot detect abnormal temperatures in a timely manner. This results in a lack of comprehensive and effective monitoring of fires in their early stages, delaying firefighting efforts and causing greater losses.
Design an aspirating smoke detector with over-temperature alarm function. Combining a smoke detection unit and a temperature detection unit, it uses the high-energy LED scattering principle and a high-precision thermistor to monitor smoke and temperature in real time. The microprocessor performs signal analysis and control, promptly issues an over-temperature alarm signal, and connects to an external fire control system through a communication interface to achieve remote monitoring.
It enables dual monitoring of smoke and temperature in the early stages of a fire, improving the comprehensiveness and accuracy of fire early warning, reducing missed and false alarms, providing timely alarms, buying more time for personnel evacuation and firefighting, improving the adaptability and reliability of the equipment, and supporting remote monitoring and management.
Smart Images
Figure CN224067267U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smoke detectors, specifically an aspirating smoke detector with an over-temperature alarm function. Background Technology
[0002] As an advanced fire detection device, the aspirating smoke detector actively extracts air samples to detect smoke, enabling it to detect smoke in the early stages of a fire. It has advantages such as high sensitivity and fast response speed, and is widely used in various important places, such as data centers, museums, and libraries.
[0003] Most existing aspirating smoke detectors only have smoke detection capabilities. In practical applications, some fire accidents not only produce smoke but also experience a rapid increase in temperature. If the detector cannot detect the temperature abnormality in time, it may lead to the fire not being fully and effectively monitored in its early stages, thus delaying the firefighting opportunity and causing greater losses.
[0004] Therefore, those skilled in the art have provided an aspirating smoke detector with an over-temperature alarm function to solve the problems mentioned in the background art. Utility Model Content
[0005] The purpose of this invention is to provide an aspirating smoke detector with an over-temperature alarm function, in order to solve the problem mentioned in the background art that most existing aspirating smoke detectors only have smoke detection functions. In practical applications, some fire accidents not only produce smoke, but also are accompanied by a rapid increase in temperature. If the detector cannot detect the temperature abnormality in time, it may lead to the fire not being fully and effectively monitored in the early stage, thereby delaying the fire extinguishing time and causing greater losses.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] An aspirating smoke detector with an over-temperature alarm function includes a housing, an aspirating unit, a smoke detection unit, a temperature detection unit, a control unit, and an alarm unit. The housing contains the aspirating unit, smoke detection unit, temperature detection unit, control unit, and alarm unit.
[0008] The intake unit mainly includes an intake pump, pipes, and an air inlet. The intake pump is fixedly connected to the air inlet through the pipes, and the intake pump is electrically connected to the control unit through connecting wires.
[0009] Smoke Detection Unit: The smoke detection unit can use high-energy LED scattering. The smoke detection unit includes a high-energy LED emitter and a photoelectric receiver. The high-energy LED emitter and photoelectric receiver are wirelessly connected to the control unit.
[0010] Temperature detection unit: The temperature detection unit is equipped with a high-precision thermistor, which is located on one side of the air inlet. The high-precision thermistor is electrically connected to the control unit through a Wheatstone bridge circuit.
[0011] Control Unit: The control unit is equipped with a microprocessor, which is wirelessly connected to the intake unit, smoke detection unit, temperature detection unit and alarm unit. The control unit is electrically connected to the external fire control system through a communication interface.
[0012] Alarm Unit: The alarm unit is equipped with an audible and visual alarm. The audible and visual alarm is electrically connected to the intake unit, smoke detection unit, temperature detection unit, control unit, and alarm unit via connecting wires.
[0013] In a preferred embodiment of this utility model, the suction pump can be a variable displacement vacuum pump or a momentum transfer pump, the pipeline can be a flexible pipeline, and both ends of the pipeline are provided with sleeve rings.
[0014] In a preferred embodiment of this utility model, the high-energy LED emitter has a built-in high-energy LED emitting tube, a high-energy LED emitting terminal, and a high-energy LED control switch. The high-energy LED control switch and the high-energy LED emitting terminal are electrically connected by a connecting wire.
[0015] In a preferred embodiment of the present invention, the photoelectric receiver is provided with a phototransistor and an electrical transmitter, and the phototransistor is provided with photogenerated carriers and an amplification circuit.
[0016] As a preferred embodiment of this utility model: the sound and light alarm is equipped with a sound collector, a sound processor, a speaker, a sound sensor, a light sensor and an alarm bell.
[0017] In a preferred embodiment of this utility model, the control unit is provided with a PCB program controller, and the PCB program controller is provided with a smoke concentration alarm threshold.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] This utility model discloses an aspirating smoke detector with an over-temperature alarm function. It can monitor ambient temperature in real time while detecting smoke. When the temperature exceeds a set threshold, it promptly issues an over-temperature alarm signal, improving the comprehensiveness and accuracy of fire early warning. By simultaneously setting up smoke detection and temperature detection units, it achieves dual monitoring of smoke and temperature in the early stages of a fire, greatly improving the comprehensiveness of fire early warning and reducing the possibility of missed or false alarms. The timely alarm function activates immediately when the temperature exceeds the set threshold, complementing the smoke alarm function. This allows for more timely warnings in the early stages of a fire, buying more time for evacuation and firefighting. In intelligent control mode, the control unit uses a microprocessor to accurately analyze and process smoke and temperature signals. It can adjust parameters such as the aspirating pump speed and alarm threshold according to actual needs, achieving intelligent control of the detector and improving the adaptability and reliability of the equipment. Remote monitoring is achieved through a communication interface, allowing for easy connection to external fire control systems for remote monitoring and management. This facilitates timely access to fire early warning information and improves fire management efficiency. Attached Figure Description
[0020] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:
[0021] Figure 1 This is a schematic diagram of the overall internal structure of an aspirating smoke detector with an over-temperature alarm function. Detailed Implementation
[0022] Please see Figure 1 In this embodiment of the utility model, an aspirating smoke detector with an over-temperature alarm function is provided. The aspirating smoke detector mainly includes a shell, an aspirating unit, a smoke detection unit, a temperature detection unit, a control unit, and an alarm unit. The shell is used to protect the internal units and has an air inlet and an air outlet. The air inlet is connected to an aspirating pipe and can extract air samples from the monitoring area.
[0023] The air intake unit mainly consists of an air intake pump, piping, and an air inlet. The air intake pump is fixedly connected to the air inlet via the piping, and is electrically connected to the control unit via a connecting wire. The air intake unit uses an air intake pump connected to the air inlet via piping, which generates stable suction to continuously draw air from the monitoring area into the detector. The speed of the air intake pump can be adjusted by the control unit to adapt to the air sampling volume requirements of different monitoring environments.
[0024] Smoke Detection Unit: The smoke detection unit utilizes high-energy LED scattering. It includes a high-energy LED emitter and a photodetector, which are wirelessly connected to the control unit. The unit employs the high-energy LED scattering principle, with the emitter and receiver housed within the detector. When an air sample containing smoke particles enters the detection area, the high-energy LED beam irradiates the smoke particles, causing scattering. The photodetector receives the scattered light and converts it into an electrical signal. The smoke detection unit transmits this signal to the control unit, which determines whether the smoke concentration has reached the alarm threshold based on the signal strength.
[0025] Temperature Detection Unit: The temperature detection unit contains a high-precision thermistor located on one side of the air inlet. This thermistor is electrically connected to the control unit via a Wheatstone bridge circuit. The high-precision thermistor, installed inside the detector near the air inlet, can quickly and accurately sense the temperature of the air entering the detector. The thermistor's resistance changes with temperature, and this change is converted into a voltage signal by the Wheatstone bridge circuit and output to the control unit.
[0026] Control Unit: The control unit is equipped with a microprocessor, which is wirelessly connected to the intake unit, smoke detection unit, temperature detection unit, and alarm unit. The control unit is electrically connected to an external fire control system via a communication interface. The microprocessor receives and analyzes signals from the smoke and temperature detection units. When the smoke concentration exceeds a set smoke alarm threshold or the temperature exceeds a set over-temperature alarm threshold, the microprocessor sends an alarm command to the alarm unit. Simultaneously, the control unit can also transmit data with the external fire control system via the communication interface, enabling remote monitoring and management.
[0027] Alarm Unit: The alarm unit is equipped with an audible and visual alarm. The audible and visual alarm is electrically connected to the air intake unit, smoke detection unit, temperature detection unit, control unit, and the alarm unit via connecting wires. The alarm unit includes an audible and visual alarm. Upon receiving an alarm command from the control unit, the audible and visual alarm emits a strong audible and visual alarm signal to alert nearby personnel to the fire hazard.
[0028] This system can monitor ambient temperature in real time while detecting smoke. When the temperature exceeds a set threshold, it promptly issues an over-temperature alarm signal, improving the comprehensiveness and accuracy of fire early warning. By simultaneously setting up smoke and temperature detection units, it achieves dual monitoring of smoke and temperature in the early stages of a fire, significantly enhancing the comprehensiveness of fire early warning and reducing the possibility of missed or false alarms. The timely alarm function activates immediately when the temperature exceeds the set threshold, complementing the smoke alarm function and enabling more timely alerts in the early stages of a fire, buying more time for evacuation and firefighting efforts.
[0029] The suction pump can be a variable displacement vacuum pump or a momentum transfer pump, and the piping can be flexible, with sleeves at both ends. The high-energy LED emitter integrates a high-energy LED emitting tube, a high-energy LED emitting terminal, and a high-energy LED control switch, electrically connected to the high-energy LED emitting terminal via a connecting wire. The photodetector contains a phototransistor and an electrical transmitter; the phototransistor includes photogenerated carriers and an amplifier circuit. The audible and visual alarm includes a sound collector, a sound processor, a speaker, a sound sensor, a light sensor, and an alarm bell. The control unit contains a PCB programmable controller with a smoke concentration alarm threshold.
[0030] In intelligent control, the control unit uses a microprocessor, which can accurately analyze and process smoke and temperature signals, and can adjust parameters such as the intake pump speed and alarm threshold according to actual needs, realizing intelligent control of the detector, improving the adaptability and reliability of the equipment. The remote monitoring has a communication interface, which can be easily connected to an external fire control system to realize remote monitoring and management, facilitate timely access to fire early warning information, and improve fire management efficiency.
[0031] The working principle of this invention is as follows: The outer shell protects the internal units and has an air inlet and an air outlet. The air inlet is connected to a suction pipe, which can extract air samples from the monitoring area. The suction unit uses a suction pump, which is connected to the air inlet through a pipe, generating stable suction to continuously draw air from the monitoring area into the detector. The speed of the suction pump can be adjusted by the control unit to adapt to the air sampling volume requirements of different monitoring environments. The smoke detection unit uses the high-energy LED scattering principle, with a high-energy LED emitter and a photoelectric receiver inside the detector. When an air sample containing smoke particles enters the detection area, the high-energy LED beam irradiates the smoke particles and scatters the light. The photoelectric receiver receives the scattered light and converts it into an electrical signal. The smoke detection unit transmits this electrical signal to the control unit, which determines whether the smoke concentration has reached the alarm threshold based on the strength of the electrical signal. The temperature detection unit uses a high-precision thermistor, which is installed inside the detector near the air inlet, enabling it to quickly and accurately sense the temperature of the air entering the detector. The resistance value of the thermistor changes with temperature, and the change in resistance value is converted into a voltage signal and output to the control unit through a Wheatstone bridge circuit. The control unit employs a microprocessor, which is electrically connected to the intake unit, smoke detection unit, temperature detection unit, and alarm unit. The microprocessor receives and analyzes signals from the smoke and temperature detection units. When the smoke concentration exceeds the set smoke alarm threshold or the temperature exceeds the set over-temperature alarm threshold, the microprocessor sends an alarm command to the alarm unit. Simultaneously, the control unit can also transmit data with an external fire control system via a communication interface, enabling remote monitoring and management. The alarm unit includes an audible and visual alarm. Upon receiving the alarm command from the control unit, the audible and visual alarm emits a strong audible and visual alarm signal to alert nearby personnel to potential fire hazards. Installation and Commissioning: First, install the housing of the aspirating smoke detector in a suitable location within the monitored area, ensuring the air inlet can effectively draw air from the monitored area. Connect the intake pipe and securely connect the intake pump to the intake pipe. Then, make the electrical connections to the detector, correctly connecting the smoke detection unit, temperature detection unit, control unit, and alarm unit according to the circuit diagram and connecting the power supply. During commissioning, set appropriate smoke alarm and over-temperature alarm thresholds through the control unit and adjust the intake pump speed according to the monitoring environment requirements. Simultaneously, the high-energy LED emitter and photodetector are calibrated to ensure the accuracy of smoke detection. The thermistor of the temperature detection unit is calibrated to guarantee the accuracy of temperature measurement. During normal operation, the air pump continuously draws air from the monitoring area into the detector through the air inlet. When an air sample containing smoke particles enters the smoke detection unit, the high-energy LED emitter emits a high-energy LED beam. The smoke particles scatter the high-energy LED beam, and the photodetector receives the scattered light and converts it into an electrical signal, which is then transmitted to the control unit.Meanwhile, the thermistor in the temperature detection unit senses the air temperature entering the detector in real time, converting the resistance change into a voltage signal and transmitting it to the control unit. The microprocessor in the control unit analyzes and processes the signals transmitted from the smoke detection unit and the temperature detection unit. If the smoke concentration does not exceed the smoke alarm threshold and the temperature does not exceed the over-temperature alarm threshold, the detector continues to operate normally. When the smoke concentration exceeds the smoke alarm threshold or the temperature exceeds the over-temperature alarm threshold, the control unit immediately sends an alarm command to the alarm unit, and the audible and visual alarm emits a strong audible and visual alarm signal. At the same time, the control unit transmits the alarm information to the external fire control system through the communication interface to achieve remote alarm and monitoring. Maintenance and upkeep: Regularly maintain and service the aspirating smoke detector to ensure its normal operation. Check for blockages or damage in the intake pipe; clean or replace if problems are found. Clean the high-energy LED emitter and photoelectric receiver inside the detector to prevent dust and other impurities from affecting the smoke detection accuracy. Regularly calibrate the thermistor to ensure the accuracy of temperature detection. Also, check the electrical connections of each unit for tightness; tighten if loose. In addition, regularly test the alarm unit to ensure that the audible and visual alarm functions normally when an alarm is triggered.
[0032] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. An aspirating smoke detector having an over-temperature alarm function, comprising an aspirating smoke detector, characterized in that, The aspirating smoke detector mainly comprises a shell, an air suction unit, a smoke detection unit, a temperature detection unit, a control unit and an alarm unit. The shell is internally provided with the air suction unit, the smoke detection unit, the temperature detection unit, the control unit and the alarm unit. The air suction unit mainly comprises an air suction pump, a pipeline and an air inlet, the air suction pump is fixedly connected with the air inlet through the pipeline, and the air suction pump is electrically connected with the control unit through a connecting wire. The smoke detection unit can adopt high-energy LED scattering, and comprises a high-energy LED emitter and a photoelectric receiver, the high-energy LED emitter and the photoelectric receiver are electrically connected with the control unit through wireless. The temperature detection unit is internally provided with a high-precision thermistor, the high-precision thermistor is located on one side of the air inlet, and the high-precision thermistor is electrically connected with the control unit through a Wheatstone bridge circuit. The control unit is internally provided with a microprocessor, the microprocessor is electrically connected with the air suction unit, the smoke detection unit, the temperature detection unit and the alarm unit through wireless, and the control unit is electrically connected with an external fire control system through a communication interface. The alarm unit is internally provided with an audible and visual alarm, and the audible and visual alarm is electrically connected with the air suction unit, the smoke detection unit, the temperature detection unit, the control unit and the alarm unit through a connecting wire.
2. The aspirating smoke detector with over-temperature alarm function according to claim 1, characterized in that, The air suction pump can be a variable volume vacuum pump and a momentum transmission pump, the pipeline can be a flexible pipeline, and the pipeline is provided with a sleeve ring at both ends.
3. The aspirating smoke detector with over-temperature alarm function according to claim 1, characterized in that, The high-energy LED emitter is internally provided with a high-energy LED emitting tube, a high-energy LED emitting end and a high-energy LED control switch, and the high-energy LED control switch is electrically connected with the high-energy LED emitting end through a connecting wire.
4. The aspirating smoke detector with over-temperature alarm function according to claim 1, characterized in that, The photoelectric receiver is internally provided with a light receiving converter and an electric transmitter, and the light receiving converter is internally provided with a light-induced carrier and an amplifying circuit.
5. The aspirating smoke detector with over-temperature alarm function according to claim 1, characterized in that, The audible and visual alarm is internally provided with a sound collector, a sound processor, a loudspeaker, a sound sensor, a light sensor and an alarm bell.
6. The aspirating smoke detector with over-temperature alarm function according to claim 1, characterized in that, The control unit is internally provided with a PCB program controller, and the PCB program controller is internally provided with a smoke concentration alarm threshold.