Device for filling vehicle air conditioning systems with refrigerant R744

US10480836B2 · kind B2 · utility

Assignee

• Dürr Somac GmbH · DE

Inventors

• Thomas Achatz · Markt Indersdorf, DE
• Jörg Ritter · Baden-Baden, DE

Key dates

• Filing date: Jul 1, 2015
• Grant date: Nov 19, 2019
• Expiry date: Apr 28, 2036

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F25B2345/003
• WIPO field: Thermal processes and apparatus
• WIPO sector: Mechanical engineering

Abstract

Apparatus for filling an automobile air conditioning system with refrigerant in a liquid state is disclosed. R744 refrigerant is pumped in a liquid state from a storage tank to a refrigerant filling station having an inlet and two outlets. A first outlet is connected to a first refrigerant return line back to the storage tank. A second outlet is connected to an adapter for attaching to a service port of the air conditioning system during filling. An adapter support that has a connection port substantially the same as the service port receives the adapter when it is in a storage position. A valve is connected to the inlet and the first outlet and a temperature sensor measures a temperature of the refrigerant at the inlet. When the temperature is above a threshold, the valve closes the inlet and connects the refrigerant supply line to the first refrigerant return line.