STACK EFFECT REDUCTION DOOR CONTROL

Product

Product Introduction

A system designed to prevent elevator door malfunctions caused by collision phenomena due to temperature and pressure differences inside and outside the building, improving elevator door closing by controlling the door closing speed through the door inverter program when collision phenomena occur.

* The stack reduction door control can be installed using the control panel-door communication interface and set up and modified by the service personnel using the HHT through the communication interface between the control panel and the door inverter. However, this function cannot be applied if third-party door systems are installed in first-party elevators.

Applies to

Requirements

In case of elevator door malfunctions due to stack effect after elevator installation, the stack effect reduction door control algorithm can be enabled by updating the door inverter program.

This function cannot be applied if third-party door systems are installed.

Key features

Features

This is a software-based control mechanism, not a mechanical device, allowing continuous performance enhancement

Door closing speed adjustment through door inverter software
Customized performance enhancement achievable through software updates without the need for mechanical changes

Difference before and after the stack effect reduction door control

Reference

Comparison Before and After Applying Algorithm (1)

Category		New HQ Site of “N” Company
Site Specification		B1 to 28th floors Installation ranges from low-speed (WB) to high-speed (SU)
Before Applying Algorithm	Failure Conditions	Strong winds in the winter season Lobby entrance open during winter, causing elevator operation to cease
Before Applying Algorithm	Failure Frequency (Based on monitoring panel detection)	Occurred following a stack effect with an 80% probability
After Applying Algorithm	Failure Frequency (Based on monitoring panel detection)	Reduced the failure rate by 80%
After Applying Algorithm	On-site Manager’s Perceived Impact	After detecting the stack effect in the monitoring panel, resolving the issue by performing 1-2 door re-opens (No interruption of elevator operation, normal operation resumed)

Comparison Before and After Applying Algorithm (2)

Category		“K” Apartments in Ilsan
Site Specification		B5 to 49th floors Medium to low speed (WB)
Before Applying Algorithm	Failure Conditions	Strong winds in the winter season Elevator operation is hindered when the entrance door remains open for an extended period, such as during moving items, etc. (Manual closure of the entrance door is required as it is not an automatic door)
Before Applying Algorithm	Failure Frequency (Based on monitoring panel detection)	Occurred following a stack effect with an 100% probability (Excluding entrapment incidents. Stacking was the primary cause of door malfunctions)
After Applying Algorithm	Failure Frequency (Based on monitoring panel detection)	Reduced the failure rate by 90%
After Applying Algorithm	On-site Manager’s Perceived Impact	While there are noise complaints related to heavy door closure (from basement level 5 to ground level 2) at that location, there have been no incidents of elevator operation stoppage or door malfunction caused by stacking.

Notes

This feature may not be applicable to certain legacy elevator models. If you wish to apply this feature to elevators already in operation, please contact our service personnel for further assistance.

※ The images in this material are provided for illustrative purposes and may differ slightly from the actual products. Please be aware that certain specifications are subject to change

EXPRESS SMART GROUP CONTROL SYSTEM

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