CN113856089B - Smoke blocking vertical wall control method - Google Patents
Smoke blocking vertical wall control method Download PDFInfo
- Publication number
- CN113856089B CN113856089B CN202111201776.6A CN202111201776A CN113856089B CN 113856089 B CN113856089 B CN 113856089B CN 202111201776 A CN202111201776 A CN 202111201776A CN 113856089 B CN113856089 B CN 113856089B
- Authority
- CN
- China
- Prior art keywords
- smoke
- vertical wall
- blocking vertical
- information processing
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
- A62C2/24—Operating or controlling mechanisms
- A62C2/246—Operating or controlling mechanisms having non-mechanical actuators
- A62C2/247—Operating or controlling mechanisms having non-mechanical actuators electric
-
- A—HUMAN NECESSITIES
- A62—LIFE-SAVING; FIRE-FIGHTING
- A62C—FIRE-FIGHTING
- A62C2/00—Fire prevention or containment
- A62C2/06—Physical fire-barriers
Landscapes
- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Fire Alarms (AREA)
Abstract
The invention provides a control method of a smoke-blocking vertical wall, which relates to the technical field of smoke-blocking vertical walls and comprises the following steps: s1: after the smoke blocking vertical wall is installed, judging whether a mains supply end starts working or not, if so, executing S2; otherwise, the operation is not executed; s2: the information processing end performs timing and acquires a lock box message; s3: judging whether the combination control information is acquired; if yes, executing S5; otherwise, continuing timing; s4: judging whether the timing reaches a preset time threshold value; if yes, executing S5; otherwise, no operation is executed; s5: when the commercial power supply end stops working, the information processing end controls the battery inversion end to supply power to the controller and drives the smoke-blocking vertical wall body to be closed downwards. The control method of the smoke-blocking vertical wall can start the power-off descending function of the smoke-blocking vertical wall without climbing, has high intelligence degree, can intelligently analyze and distinguish a test state and a formal use state, ensures that the power-off descending function is started during the formal use, and has high safety.
Description
Technical Field
The invention relates to the technical field of smoke-blocking vertical walls,
in particular, the invention relates to a control method of a smoke barrier vertical wall.
Background
The smoke-blocking vertical wall is made of non-combustible material, and the smoke-blocking vertical wall is a fixed or movable smoke-blocking facility which is not less than 500mm and is hung from the ceiling. The movable smoke-blocking vertical wall is a smoke-blocking vertical wall which automatically hangs down due to the action of temperature sensing, smoke sensing or other control equipment in fire. The smoke-proof partition is mainly used for occasions such as high-rise or super high-rise superstores, office buildings and warehouses, can effectively prevent smoke from flowing transversely under the building ceiling, is beneficial to improving the smoke-proof effect in the smoke-proof partition, and plays a positive role in guaranteeing the safety of lives and properties of people.
The motor of the smoke-blocking vertical wall is controlled by a motor controller of the smoke-blocking vertical wall; moreover, after the smoke blocking vertical wall is installed, smoke blocking is needed, once the mains supply of the whole building is disconnected due to fire, the smoke blocking vertical wall cannot descend to block smoke, and the smoke blocking vertical wall is controlled to descend to block smoke through a standby power supply in the motor controller when the mains supply is powered off; for example, chinese patent application CN113412012A provides a multifunctional smoke barrier suspended wall controller, which relates to the technical field of smoke barrier suspended walls and includes a base and a cover, wherein a control circuit board is disposed between the base and the cover, the cover includes a functional cover, a control cover and a battery cover, the functional cover is higher than the control cover, the control circuit board includes a high-voltage region, a low-voltage region and a control region, at least a portion of each of the high-voltage region and the low-voltage region is located in the functional cover, the control region is located in the control cover, a backup battery is disposed in the battery cover, a main electrical inlet is disposed on the functional cover, and a signal inlet is disposed on the control cover. The smoke barrier vertical wall type remote control device is simple in structure, the high-voltage area, the low-voltage area and the control area are integrated on one circuit board, the integration level is high, the occupied space of the whole controller is small, a user can add a remote control external device on the controller to carry out classification control on a large quantity of smoke barrier vertical walls, the control effect is good, the use is convenient, and the safety is high.
That is to say, when the commercial power of the high-voltage area is cut off, the standby battery of the low-voltage area supplies power to drive the smoke-blocking vertical wall to work, which is called as the power-off descending function; however, when the smoke-blocking vertical wall is installed, the building or the factory building is in a blank state, and before the building or the factory building formally starts to use, the smoke-blocking vertical wall generally needs to be tested for the lifting function for many times, so that the smoke-blocking vertical wall can be subjected to power-on and power-off operations for many times, and in the processes, the power-off and power-off function should not be started; therefore, the power-off descending function is in a closed state in the testing period after the smoke-blocking vertical wall is installed, when the smoke-blocking vertical wall is used formally after the testing is finished, a switch at a standby power supply position on the controller is pressed, so that the power-off descending function is started, the installation position of the controller is high (generally, the height of a suspended ceiling), the installation number of the smoke-blocking vertical wall is large, when the power-off descending function is started, a worker needs to move a ladder to climb to each controller to press the standby power supply switch, and the efficiency is very slow.
Therefore, in order to solve the above problems, it is necessary to design a reasonable control method for the smoke barrier.
Disclosure of Invention
The invention aims to provide a control method of a smoke-blocking vertical wall, which can start the power-off descending function of the smoke-blocking vertical wall without climbing, has high intelligence degree, can intelligently analyze and distinguish the current test state from the formal use state, ensures the power-off descending function to be started when the smoke-blocking vertical wall is formally used, and has high safety.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
a control method of a smoke-blocking vertical wall is suitable for a control system of the smoke-blocking vertical wall, the system comprises a smoke-blocking vertical wall body, a motor used for controlling the smoke-blocking vertical wall body to operate, a controller used for controlling the motor to operate and a lock box electrically connected with the controller, the lock box is arranged on a wall body, a control button is arranged on the lock box, and the controller comprises a mains supply end, a battery inversion end and an information processing end; the method comprises the following steps:
s1: after the smoke blocking vertical wall is installed, judging whether a mains supply end starts to work or not, and if so, executing a step S2; otherwise, the operation is not executed;
s2: the information processing end times the working time of the commercial power supply end and acquires a message sent by the lock box;
s3: the information processing terminal judges whether the combined control information sent by the lock box is acquired or not; if yes, directly executing the step S5; otherwise, continuing timing;
s4: the information processing end judges whether the timing reaches a preset time threshold value; if yes, executing step S5; otherwise, the operation is not executed;
s5: when the commercial power supply end stops working, the information processing end controls the battery inversion end to supply power to the controller, and the driving motor works to enable the smoke-blocking vertical wall body to move downwards to be closed.
Preferably, when the mains supply terminal starts to operate, the step S1 is executed to record and upload the supply voltage.
Preferably, when step S2 is executed, the information processing terminal counts the continuous operating time of the utility power supply terminal.
Preferably, in the step S2, the connection mode between the lock box and the controller includes a wired connection, a bluetooth connection, and a wifi connection.
Preferably, in step S3, the combination control information includes control information issued by at least one control button pressed in a predetermined sequence and time.
As a preferable aspect of the present invention, the combination control information is preset and the information processing side is disposed before the step S3 is executed.
Preferably, when the step S4 is executed, the information processing end determines that the continuous working time of the commercial power supply end reaches a predetermined time threshold, and then the step S5 is executed; otherwise, the commercial power supply end stops working when the commercial power supply end does not work continuously for a preset time threshold, the step S5 is not executed, and when the commercial power supply end works again, timing is restarted, and the step S2 is returned.
Preferably, the predetermined time threshold is preset and stored in the information processing terminal before step S4 is executed.
Preferably, in step S5, the battery inverter inverts the low-voltage dc of the battery into a high-voltage ac to supply power to the controller.
Preferably, when step S5 is executed, the power supply formed by the battery inverter terminal for the controller is 220V50Hz square wave alternating current.
The smoke blocking vertical wall control method has the beneficial effects that: need not to climb, alright with the outage decline function that opens the wall that hangs down of keeping off the cigarette, and intelligent degree is high, can intelligent analysis and distinguish and be in test state or formal user state at present, guarantee to open the outage decline function when keeping off the wall formal use of cigarette, the security is high.
Drawings
Fig. 1 is a schematic flow chart of a method for controlling a smoke barrier wall according to the present invention.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the modules and structures set forth in these embodiments does not limit the scope of the invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate.
The embodiment is as follows: as shown in fig. 1, which is only one embodiment of the present invention, a method for controlling a smoke barrier suspended wall is suitable for a smoke barrier suspended wall control system, the system includes a smoke barrier suspended wall body, a motor for controlling the operation of the smoke barrier suspended wall body, a controller for controlling the operation of the motor, and a lock box electrically connected to the controller, the lock box is disposed on a wall, a control button is disposed on the lock box, and the controller includes a mains supply terminal, a battery inversion terminal, and an information processing terminal;
in the system, the controller is still arranged at a high place (the height of a suspended ceiling of a building or a factory building) and is used for controlling the smoke-blocking vertical wall body; the lock box is arranged on the wall body at a height which can be obtained by ordinary people; the control buttons on the lock box comprise an uplink button, a downlink button and a pause button; the lock box can be in wired connection or wireless connection with the controller, a button of the lock box can be pressed to send a signal to the information processing end of the controller, and the information processing end can analyze the button signal to control the upward movement, the downward movement or the pause of the smoke barrier vertical wall body; the information processing end has the functions of controlling the overall operation of the controller (similar to a control chip), receiving a lock box signal, sending an uplink and downlink control signal of the smoke barrier vertical wall and the like, and in the controller, a mains supply end (comprising an electrolytic capacitor, a transformer, a negative temperature resistor, a common mode inductor and the like) is used for supplying 220V mains supply to the controller and the smoke barrier vertical wall body; the battery inversion end (comprising a relay and the like) is used for inverting a backup battery (a low-voltage direct-current battery) into 220V alternating current to supply power for the controller and the smoke-blocking vertical wall body under the condition that the commercial power is disconnected.
The method comprises the following steps:
s1: after the smoke blocking vertical wall is installed, judging whether a mains supply end starts to work or not, and if so, executing a step S2; otherwise, the operation is not executed;
namely, under the condition that the smoke barrier vertical wall body and the controller are installed and the circuit is communicated, once the mains supply end starts to work, the controller is connected with the mains supply, and at the moment, the controller is electrified with the smoke barrier vertical wall body, so that the control flow of the smoke barrier vertical wall can be performed; otherwise, if the commercial power supply end does not start working, the smoke blocking vertical wall is directly determined not to start to be used, and no operation is needed.
It should be noted that if the commercial power supply end does not start working, the battery inversion end does not need to start working, and the whole smoke barrier vertical wall system is in a closed state.
Moreover, when carrying out step S1, the commercial power supply end begins the during operation, carries out the record and uploads power supply voltage, and controller and fender cigarette hang down the wall body circular telegram, for the convenience of manual work overhaul and be convenient for operating personnel open "outage decline" function, need the operating condition that the operator can audio-visually monitoring fender cigarette hang down the wall system, timely gets rid of the risk.
S2: the information processing end times the working time of the commercial power supply end and acquires a message sent by the lock box;
at this moment, the controller and the smoke-blocking vertical wall body are electrified, the control flow of the smoke-blocking vertical wall can be carried out, so that the information processing end needs to time the working time of the commercial power supply end and can receive the message sent by the lock box.
That is, once the controller starts to operate, two operations are performed simultaneously: firstly, timing; and the other is receiving information.
In the timing, the information processing end times the continuous working time of the commercial power supply end; that is, the time during which the commercial power is continuously supplied is counted.
When receiving information, the connection mode between lock box and the controller includes wired connection, bluetooth connection and wifi connection. Of course, the information processing end needs to authenticate with the lock box, and only if the two authorities correspond, the information processing end and the lock box can be interconnected.
S3: the information processing terminal judges whether the combined control information sent by the lock box is acquired or not; if yes, directly executing the step S5; otherwise, continuing timing;
the information processing end receives and processes the message sent by the lock box in real time; once the information processing end receives the specific control signal sent by the lock box, step S5 is directly executed, i.e. the "power down" function is turned on.
Here, the combination control information includes control information issued by at least one control button being pressed in a predetermined order and time;
there are many possibilities to combine control information:
possibly, the smoke blocking vertical wall is in an open state (namely in an upper limit state), the combined control information is that an uplink button key of the lock box is pressed, so that the smoke blocking vertical wall body continuously receives the uplink information in the upper limit state, and a downlink button key is pressed after 5 seconds (at the moment, the uplink button key is not loosened), and at the moment, the information processing end receives the combined information and activates a power-off descending function;
the lock box may have an "activation button" (or one of the up button, the down button and the pause button is set as the activation button) in addition to the up button, the down button and the pause button, and when the activation button is pressed (if one of the up button, the down button and the pause button is set as the activation button, the pressing is preferably continued for a certain time to distinguish the original functions of the button), the information processing end directly activates the "power-off down" function;
in a possible one, the combined control information is information sent by a plurality of control buttons (an up button and a down button) according to a preset sequence and duration; in the second possibility, the combined control information is a control button pressed (or pressed for a certain time) to send out information; the former has strong false touch resistance function, but is troublesome to control; the latter is simple to control but presents a risk of false touches.
Of course, before step S3 is executed, the combination control information is preset and the information processing side is disposed. Namely, the button combination information on the lock box can be preset according to the number of the buttons on the lock box and the using environment of the smoke barrier vertical wall body, and once the information processing end receives the combination information, the power-off descending function is activated.
S4: the information processing end judges whether the timing reaches a preset time threshold value; if yes, executing step S5; otherwise, the operation is not executed;
in addition to the function of 'power-off descent' controlled and activated by the button combination information on the lock box, there is a case that the smoke barrier suspended wall has already been put into use formally, but a button on the lock box on one smoke barrier suspended wall is not pressed, so that an operator neglects to press or forgets to activate the 'power-off descent' function, and at this time, in order to ensure the safety in a building, the 'power-off descent' function needs to be intelligently activated under certain conditions.
Here, the certain condition is a timing condition, that is, when the information processing end counts the time of the continuous power-on of the utility power and the continuous power-on time of the utility power exceeds a predetermined time threshold, the "power-off reduction" function is intelligently activated.
That is, when step S4 is executed, if the information processing end determines that the continuous operating time of the utility power supply end reaches the predetermined time threshold (24 h or 48 h), step S5 is executed, and only the "power-off lowering" function is activated; otherwise, the commercial power supply end stops working when the commercial power supply end does not work continuously for a preset time threshold, the step S5 is not executed, and when the commercial power supply end works again, timing is restarted, and the step S2 is returned.
The reason here is that after the smoke-blocking vertical wall is installed integrally, the building is not formally started to be used, a test period from several days to several months is available, not only whether the smoke-blocking vertical wall is normally switched on or off is tested, but also the mains supply power condition of the whole building is tested, multiple power on/off operations are generally carried out, the period of each test does not generally exceed one day, the preset time threshold is set to 24h, once the power on (enabling the mains supply end to start working) in the building continues to exceed 24h, the building can be defaulted to formally start to be used, the test period is not longer, and at this time, the controller and the smoke-blocking vertical wall body formally start the smoke-blocking function in the building.
Naturally, before the step S4 is executed, a predetermined time threshold is preset and stored in the information processing terminal; typically 24h, although this predetermined time threshold may be set according to the particular environment in which the smoke barrier is used.
S5: when the commercial power supply end stops working, the information processing end controls the battery inversion end to supply power to the controller, and the driving motor works to enable the smoke blocking vertical wall body to move downwards to be closed.
Step S5, controlling and operating the smoke blocking vertical wall after the power-off descending function is activated; at the moment, the smoke barrier vertical wall body still works under the power supply of the mains supply; once the commercial power is disconnected, that probably is the commercial power disconnection that has happened the conflagration and has caused, just need promptly to close under the circumstances of no commercial power and keep off the cigarette that fire control keeps off the wall and keep off the cigarette, and battery contravariant end is changeed the low-voltage direct current of battery into high-voltage alternating current and is supplied power for the controller this moment.
Generally, when the power down is required to be performed in step S5, the backup battery (12 VDC) is inverted into 220V high-voltage dc, and the 220V high-voltage dc is converted into 220V50Hz high-voltage square wave ac.
The control method of the smoke-blocking vertical wall can start the power-off descending function of the smoke-blocking vertical wall without climbing, has high intelligence degree, can intelligently analyze and distinguish the current test state from the formal use state, ensures that the power-off descending function is started when the smoke-blocking vertical wall is formally used, and has high safety.
The present invention is not limited to the above-described specific embodiments, and various modifications and variations are possible. Any modifications, equivalents, improvements and the like made to the above embodiments in accordance with the technical spirit of the present invention should be included in the scope of the present invention.
Claims (2)
1. A method for controlling a smoke barrier vertical wall is characterized in that: the control system is suitable for a smoke-blocking vertical wall, and comprises a smoke-blocking vertical wall body, a motor, a controller and a lock box, wherein the motor is used for controlling the smoke-blocking vertical wall body to operate; the method comprises the following steps:
s1: after the smoke blocking vertical wall is installed, judging whether a mains supply end starts to work or not, and if so, executing a step S2; otherwise, the operation is not executed; when the commercial power supply end starts to work, the power supply voltage is recorded and uploaded;
s2: the information processing end times the continuous working time of the commercial power supply end and obtains a message sent by the lock box;
s3: the information processing terminal judges whether the combined control information sent by the lock box is acquired or not; if yes, directly executing the step S5; otherwise, continuing timing; the combined control information comprises control information sent by at least one control button according to a preset sequence and time;
s4: the information processing end judges that the continuous working time of the commercial power supply end reaches a preset time threshold, and then step S5 is executed; otherwise, stopping working when the commercial power supply end does not work continuously and reaches a preset time threshold, not executing the step S5, restarting timing when the commercial power supply end works again, and returning to the step S2; the preset time threshold is set according to the time length of a single testing period in the testing period of the building where the smoke-blocking vertical wall is located;
s5: when the commercial power supply end stops working, the information processing end controls the battery inversion end to invert low-voltage direct current of the battery into high-voltage alternating current to supply power to the controller, the motor is driven to work, so that the smoke barrier vertical wall body descends to be closed, and the battery inversion end supplies 220V50Hz square-wave alternating current to the controller;
wherein: before the step S3 is executed, presetting combined control information, and disposing an information processing end;
and (5) presetting a preset time threshold before executing the step (S4), and storing the preset time threshold to an information processing end.
2. The method for controlling a smoke barrier according to claim 1, wherein:
when the step S2 is executed, the connection mode between the lock box and the controller comprises wired connection, bluetooth connection and wifi connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111201776.6A CN113856089B (en) | 2021-10-15 | 2021-10-15 | Smoke blocking vertical wall control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111201776.6A CN113856089B (en) | 2021-10-15 | 2021-10-15 | Smoke blocking vertical wall control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113856089A CN113856089A (en) | 2021-12-31 |
| CN113856089B true CN113856089B (en) | 2022-12-02 |
Family
ID=78999662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111201776.6A Active CN113856089B (en) | 2021-10-15 | 2021-10-15 | Smoke blocking vertical wall control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113856089B (en) |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202276182U (en) * | 2011-10-21 | 2012-06-13 | 深圳市视得安罗格朗电子股份有限公司 | Intelligent power supply apparatus used for building intercommunication system |
| CN104555626B (en) * | 2015-01-09 | 2016-08-24 | 中联重科股份有限公司 | Control method for safe descending of construction elevator in case of power failure |
| CN205323053U (en) * | 2016-01-08 | 2016-06-22 | 广东永安消防科技有限公司 | Movable flexible ceiling screen |
| CN109787344B (en) * | 2018-08-02 | 2021-09-17 | 湖南汇博电子科技股份有限公司 | Fire-fighting power supply starting method, device and system and storage medium |
| CN109586395B (en) * | 2018-10-16 | 2024-04-30 | 深圳市科陆电子科技股份有限公司 | Uninterrupted power supply intelligent switching and monitoring method |
| CN210145342U (en) * | 2019-06-10 | 2020-03-17 | 中国建筑设计研究院有限公司 | Folding type smoke-blocking vertical wall device |
| CN110237454B (en) * | 2019-06-10 | 2021-04-20 | 中国建筑设计研究院有限公司 | Electric smoke-blocking vertical wall device and smoke-blocking method |
| CN210858500U (en) * | 2019-09-30 | 2020-06-26 | 衢州瑞泰门控科技有限公司 | Electric smoke-blocking vertical wall protective cover |
| CN213027533U (en) * | 2020-09-15 | 2021-04-20 | 杭州老板电器股份有限公司 | Cigarette machine equipment and cigarette machine device |
| CN112523313A (en) * | 2020-12-12 | 2021-03-19 | 江西洪都航空工业集团有限责任公司 | Intelligent closestool power-off flushing method |
| CN113216820A (en) * | 2021-05-26 | 2021-08-06 | 昆明金安利信息技术有限公司 | Roller shutter door with anti-misoperation intelligent controller |
| CN113412012A (en) * | 2021-06-25 | 2021-09-17 | 福建安麟智能科技股份有限公司 | Multifunctional smoke-blocking vertical wall controller |
-
2021
- 2021-10-15 CN CN202111201776.6A patent/CN113856089B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113856089A (en) | 2021-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207511622U (en) | A kind of elevator monitoring system based on Internet of Things and cloud service | |
| CN111573464A (en) | Power failure control method and device applied to elevator car and computer equipment | |
| CN113856089B (en) | Smoke blocking vertical wall control method | |
| CN206476614U (en) | A kind of safe O＆M control system of building elevator | |
| CN110092259A (en) | A kind of emergency management and rescue method and device of elevator | |
| CN103883243B (en) | Rolling door control system and its implementation | |
| CN207566652U (en) | Elevator malfunction autoalarm | |
| CN1218001A (en) | Automatic online detection helping method for elevator faults | |
| CN111928351A (en) | Artificial intelligence air detection remote automatic control processing system | |
| CN105762906A (en) | Device and method for intelligent charging of valve hall operation platform vehicle | |
| CN214260085U (en) | Ultraviolet disinfection device | |
| CN215248887U (en) | Little energy consumption elevator of environment-friendly | |
| CN206041568U (en) | Charging cabinet | |
| CN211903220U (en) | Remote energy-saving air conditioner control system | |
| CN210286365U (en) | Power grid sampling module of elevator power failure emergency leveling device | |
| CN201156728Y (en) | Automatic cutting apparatus | |
| CN203865752U (en) | Elevator car roof water inlet automatic protection system | |
| CN214158063U (en) | Ultraviolet disinfection device | |
| CN211955751U (en) | Detect three-phase motor brake coil circuit | |
| CN206946219U (en) | Dormitory management system | |
| CN107618958B (en) | Automatic alarm device and method for elevator trapped person | |
| CN205753572U (en) | A kind of valve Room operation platform cart intelligent charger | |
| CN216190251U (en) | Elevator anti-empty-stepping control system | |
| CN216721019U (en) | Intelligent monitoring device for substation equipment | |
| CN209259426U (en) | Elevator emergency automatic rescue device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |