Automated functional diagnosis

US9845965B2 · kind B2 · utility

Assignee

• BELIMO Holding AG · CH

Inventors

• Frank Lehnert · Weil im Schönbuch, DE
• Peter Schmidlin · Uster, CH

Key dates

• Filing date: Apr 11, 2012
• Grant date: Dec 19, 2017
• Expiry date: Sep 23, 2033

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F24F2140/40
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Disclosed is an HVAC (heating, ventilation and air-conditioning) system which comprises a fluid flow duct (1), a fluid flow valve (7) which is arranged therein and has a valve body (5) in the fluid flow duct (1) and a valve motor (15) which moves the valve body (5), a control circuit for activating the valve motor, a sensor (8) in the fluid flow duct (1) and an evaluation module for evaluating signals of the sensor. To produce an automated functional control, the following procedure is adopted: a first actuation signal is preset for the valve motor by the control circuit, and the actuation signal corresponds to a first setpoint position of the valve body (5), registration of a first signal of the sensor (8) by the evaluation module, and determination of a functional diagnosis of the fluid flow valve on the basis of the first signal of the sensor.