Stationary refrigeration and air condition compressors have to be designed robustly and at the same time, low cost. High efficiency gives customers running-cost benefits quickly. Piston or scroll type compressors, typically hermetic design, are designed at OBRIST Engineering for this application field.

Stationary Piston Compressor with 100kWe

Applications: Supermarket and Refrigeration Plants

  • Using Compactness of R744 Properties
  • Smart Heat Management for Highest Efficiencies
  • Improved Valve System for High Speed
  • Active Oil Seperation and Intelligent Oil Management
  • Electrically Piston Compressor with inline or "V" Geometry

Compressor / Expander Technology




Two interleaving spirals are used to either compress or expand a carrier medium. One of its main advantages is the superior noise level, which makes it especially suitable for hybrid and electric cars.

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With several patents and the development of the first automotive R744 compressor in mass market, OBRIST can offer profound knowledge whether it’s mobile or stationary.

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Transport Cooling

Transport Cooling

The R&D activities of OBRIST Engineering have opened new markets for R744-based systems. This is supported by the legislature and their desire to phase-out harmful refrigerants.

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Technology Selection

All products and components by OBRIST Engineering are purposely designed according to the specific requirements of the refrigerant and the application. From prototype design to build-up and to mass-production validation, our engineers and technicians offer proven expertise in the management of compressor development programs.

Scroll Technology

OBRIST Engineering develops compressors, scroll expanders and heat pumps that define global benchmarks in terms of energy-efficiency, sustainability, cost-efficiency and usability. Our deep understanding in Scroll Technology and precise in-house Scroll 2D and 3D Simulation Tools gives us fast and comprehensive calcuations of scroll geometries.


During the past two decades OBRIST Engineering emerged as the technology leader in mobile applications based on the natural refrigerant R744. Our customers profit from our industry-leading expertise. The core of our expertise lies in a deep understanding of the thermodynamic process design of HVAC systems and of the resulting functional requirements regarding all components involved.

Quality and Safety

OBRIST has established a quality management system for development, manufacturing, assembly and marketing of components and systems. All products are designed according to the highest safety requirements, often exceeding the most demanding standards. A TÜV SÜD audit has ascertained that the requirements according to ISO 9001:2015 are fulfilled. The certificate is valid until 2019.

Photo of Frank Wolf & Frank Obrist

The masterminds behind OBRIST Engineering

Frank Wolf, CEO, together with Frank Obrist, Founder and President, head a team of experienced engineers and experts.