Safety controller for an actuator

Abstract

The invention relates to a safety controller for an actuating drive (2.1, 2.2, 2.3) for controlling a gas flow or a liquid flow in an open-loop or closed-loop manner by means of a flap (3.1, 3.2, 3.3) or a valve, in particular in the field of heating, ventilation, and air conditioning (HVAC) systems, fire-protection systems, and / or room protection systems. A safety circuit (9.1, 9.2, 9.3) is implemented to ensure the energy supply in a safety operating mode if an electricity supply circuit (8.1, 8.2, 8.3) drops off or is lost. A control value output circuit (1.1, 1.2, 1.3) detects status signals, in particular signals of a sensor (11.1, 11.2, 11.3), and / or status parameters of a system and / or a specifiable setting of an adjustment device that can be actuated manually. The safety control value is set to one of at least two different control values (SW1, SW2, . . . ) depending on the status signals so that the safety position of the flap is determined adaptively.

Description

TECHNICAL FIELD[0001]The invention relates to a safety controller for an actuator having a setpoint output circuit which outputs a safe setpoint, which defines a safe position of the actuator, for the actuator. In particular, the safety controller is intended for an actuator having an actuating drive with a flap or a valve for open-loop or closed-loop control of a gas or liquid flow. The safety controller is preferably used in an installation for heating / ventilation / air conditioning (HLK), fire protection and / or area protection.[0002]The invention furthermore relates to an installation having a safety controller such as this and to a method for operation of an installation.PRIOR ART[0003]So-called actuating drives are used to adjust flaps or valves in a ventilation or water-pipe system and therefore for closed-loop control of an air or water flow, with relatively low-power electric motors driving the flaps or valves, and / or the closed-loop control members, via a step-down transmissi...

AI Technical Summary

Benefits of technology

[0010]The object of the invention is to provide a safety controller which is associated with the technical field mentioned initially, can be used more flexibly in the event of occurrences such as an electrical power failure, and keeps the damage to buildings or people as minor as possible.

Problems solved by technology

This is impossible in the case of a spring.

If the electrical power failure is associated with a fire in which a large amount of smoke gas is developed, smoke gases can no longer be carried away via the ventilation system when the flaps are closed.

The regulation of the volume flow to a predetermined value in the event of an electrical power failure therefore does not always lead to the optimum result, and can even, in contrast, lead to increased damage to buildings and people.

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