Smoke sensing security door
By integrating smoke and temperature sensors into security doors and using a PLC controller to drive an air-filled pad to seal the door gaps, the problem of existing security doors being unable to prevent smoke from spreading during a fire is solved, thus improving residential safety.
Patent Information
- Application Number
- CN202520211709.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2035-02-11
AI Technical Summary
Existing security doors are unable to effectively prevent the spread of smoke in emergencies such as fires, lack automatic response measures, and cannot fully guarantee the safety of residents.
A smoke-sensing security door was designed, integrating a smoke sensor and a temperature sensor. A PLC controller controls an electric push rod to drive an inflatable pad to expand, sealing the gap between the door leaf and the door frame and preventing smoke from spreading.
It enables the rapid sealing of door gaps during a fire, preventing smoke from entering the room and giving people inside more time to escape and be rescued.
Smart Images

Figure CN223707491U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the technical field of security doors, and in particular to a smoke-sensing security door. BACKGROUND
[0002] In modern society, with the continuous improvement of people's requirements for living safety and living quality, the demand for home security products is also increasing. The traditional security door mainly focuses on preventing illegal intrusion, but its protection function is relatively single in the face of emergency situations such as fire, especially in the case of fire and other emergencies, it has obvious shortcomings in preventing the spread of toxic smoke and protecting indoor personnel safety. When a fire occurs, smoke often spreads to the entire space earlier than flames, and the toxic gases such as carbon monoxide contained therein are extremely harmful to the human body, and if the spread of smoke cannot be effectively prevented in time, it will seriously threaten the life safety of indoor personnel.
[0003] In addition, although some security doors on the market attempt to integrate smoke alarm functions, most of them only stop at the alarm level and lack subsequent automatic response measures. Even if an alarm is sent after detecting smoke, it cannot effectively prevent the further spread of smoke, thereby failing to fully protect the safety of the occupants.
[0004] Therefore, there is an urgent need in the market for a new security door that integrates security, fire prevention, smoke monitoring, and sealing protection.
[0005] The above content is only used to assist in understanding the technical solutions of the present application and does not represent the acknowledgement of the above content as the closest prior art to the present application. SUMMARY
[0006] Based on this, the present application provides a smoke-sensing security door to solve one of the above technical problems.
[0007] The technical solution adopted by the present application to solve its technical problems is: a smoke-sensing security door, comprising: a door frame; a door leaf installed on the door frame through a hinge; a PLC controller serving as a control center; a smoke sensor for monitoring the smoke condition in the environment in real time and feeding back to the PLC controller; a temperature sensor for monitoring the ambient temperature in real time and feeding back to the PLC controller; a sealing mechanism comprising an electric push rod, a gas storage warehouse, and an inflatable pad, the electric push rod is installed at the bottom of the gas storage warehouse, a piston is installed on the electric push rod, the inflatable pad is installed on the door leaf and connected with the gas storage warehouse through a gas pipe; when the smoke sensor detects that the smoke exceeds the standard and / or when the temperature sensor detects that the temperature exceeds the standard, feedback to the PLC controller to drive the electric push rod to work, inflate the inflatable pad, and seal the gap between the door leaf and the door frame.
[0008] In some embodiments, the door leaf has an annular groove and a mounting groove, the annular groove being used to install the inflatable pad.
[0009] In some embodiments, the gas pipeline, gas storage chamber, and electric actuator are embedded in the mounting groove.
[0010] In some embodiments, the door leaf is equipped with two handles, one of which has a button that is electrically connected to an electric push rod for controlling the electric push rod to reset.
[0011] In some embodiments, the PLC controller, smoke sensor, and temperature sensor are integrated into an integrated module, which is mounted on the door panel.
[0012] The beneficial effects of this application are as follows: the smoke sensor and temperature sensor can monitor the smoke and temperature in the environment in real time, and when the smoke concentration or temperature exceeds the set value, the sealing mechanism is quickly activated. The rapid expansion of the air cushion seals the gap between the door leaf and the door frame, thereby effectively preventing smoke from entering the room through the door gap, and giving the people inside more escape time and rescue opportunities. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a three-dimensional schematic diagram of this application.
[0015] Figure 2 This is a three-dimensional schematic diagram from another perspective of this application.
[0016] Figure 3 This is a schematic diagram of the door leaf in this application.
[0017] Figure 4 This is a cross-sectional view of the door leaf of this application.
[0018] Figure 5 This is a partial cross-sectional schematic diagram of the sealing mechanism of this application.
[0019] The following are the reference numerals: 1. Door frame; 2. Door leaf; 3. Integrated module; 301. Temperature sensor; 302. Smoke sensor; 4. Sealing mechanism; 401. Electric push rod; 402. Gas storage chamber; 403. Inflatable cushion; 404. Gas supply pipe; 405. Piston; 5. Annular groove; 6. Handle; 7. Button. Detailed Implementation
[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application. In addition, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those of ordinary skill in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection of this application.
[0021] In the embodiments of this application, please refer to Figures 1-5 As shown, this smoke-sensing security door mainly includes: a door frame 1; a door leaf 2, mounted on the door frame 1 via hinges; a PLC controller, serving as a control center; a smoke sensor 302, used to monitor the smoke conditions in the environment in real time and provide feedback to the PLC controller; a temperature sensor 301, used to monitor the ambient temperature in real time and provide feedback to the PLC controller; and a sealing mechanism 4, including an electric push rod 401, an air storage chamber 402, and an air-filled pad 403. The electric push rod is mounted at the bottom of the air storage chamber 402, and a piston 405 is mounted on the electric push rod 401. The inflatable pad 403 is installed on the door leaf 2 and connected to the air storage chamber 402 via the air supply pipe 404. When the smoke sensor 302 detects excessive smoke, it sends feedback to the PLC controller, which drives the electric push rod 401 to work in conjunction with the air storage chamber 402 to inflate the inflatable pad 403 and seal the gap between the door leaf 2 and the door frame 1. Alternatively, when the temperature sensor 301 detects excessive temperature, it sends feedback to the PLC controller, which drives the electric push rod 401 to work in conjunction with the air storage chamber 402 to inflate the inflatable pad 403 and seal the gap between the door leaf 2 and the door frame 1.
[0022] The following will continue to describe some preferred / improved embodiments based on the above embodiments. Any one of the following embodiments can be selected, or multiple embodiments can be combined.
[0023] like Figure 3 As shown, the door leaf 2 has an annular groove 5 and an installation groove, and the annular groove 5 is used to install the air cushion 403.
[0024] like Figure 4 As shown, the gas pipeline 404, the gas storage chamber 402, and the electric push rod 401 are embedded in the mounting groove.
[0025] like Figure 2As shown, the door leaf 2 is equipped with two handles 6, one of which is equipped with a button 7. The button 7 is electrically connected to the electric push rod 401 and is used to control the electric push rod 401 to reset.
[0026] like Figure 1 As shown, the PLC controller, smoke sensor 302 and temperature sensor 301 are integrated on an integrated module 3, which is installed on the door leaf 2. The PLC controller is not shown in the figure.
[0027] When the value detected by the smoke sensor 302 or the temperature sensor 301 exceeds the rated value, the feedback is sent to the PLC controller, which then issues a start command to the electric push rod 401. The output end of the electric push rod 401 drives the piston 405 to move, which transports the gas in the gas storage chamber 402 to the air pad 403 through the gas supply pipe 404, causing the air pad 403 to expand and seal the gap between the door leaf 2 and the door frame 1.
[0028] When the value detected by the smoke sensor 302 or the temperature sensor 301 is lower than the rated value, or when the button 7 is pressed manually, the electric push rod 401 drives the piston 405 to reset, drawing the gas in the air cushion 403 back to the air storage chamber 402, the air cushion 403 returns to its initial state, and the seal between the door frame 1 and the door leaf 2 is released, making it easier to open the door leaf 2.
[0029] The various embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.
[0030] Finally, it should be noted that the above description is only a preferred embodiment of this application. The foregoing embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A smoke-sensor security door, characterized in that, include: Door frame; The door leaf is mounted on the door frame by hinges; The PLC controller is used as the control center. A smoke sensor is used to monitor the smoke conditions in the environment in real time and feed the feedback to the PLC controller; A temperature sensor is used to monitor the ambient temperature in real time and feed it back to the PLC controller; The sealing mechanism includes an electric push rod, an air storage chamber, and an air-filled pad. The electric push rod is installed at the bottom of the air storage chamber and a piston is mounted on the electric push rod. The air-filled pad is installed on the door and connected to the air storage chamber through an air supply pipe. When the smoke sensor detects excessive smoke and / or when the temperature sensor detects excessive temperature, feedback is sent to the PLC controller, which drives the electric push rod to inflate the air pad and seal the gap between the door leaf and the door frame.
2. A smoke-sensing security door according to claim 1, characterized in that, The door leaf has an annular groove and an installation groove, the annular groove being used to install the inflatable pad.
3. A smoke-sensing security door according to claim 2, characterized in that, The gas pipeline, gas storage tank, and electric push rod are embedded in the mounting groove.
4. A smoke-sensing security door according to claim 1, characterized in that, The door panel is equipped with two handles, one of which has a button that is electrically connected to an electric push rod and is used to control the electric push rod to reset.
5. A smoke-sensing security door according to claim 1, characterized in that, The PLC controller, smoke sensor, and temperature sensor are integrated into a single module, which is mounted on the door panel.