Skip to main content
Danfoss

Multi Ejector Solution™

Contact us

Discover why "We Love CO₂"

Yes, you heard it right. At Danfoss Cooling, We Love CO₂.

You might think that our devotion is misguided, but we can promise you that our affections are grounded in facts and modern engineering innovations. You see, despite its reputation as a pollutant, CO₂ is actually one of the most sustainable refrigerants. Unfortunately, it hasn't been possible to apply transcritical CO₂ systems in all climates – until now. Watch the video to find out why.

Complete Multi Ejector portfolio for all store sizes, CO₂ systems and climates

Danfoss offers a full range of Multi Ejectors – covering the needs for all store sizes, CO₂ systems and climates.

Multi Ejector - High pressure:

The High Pressure Ejector utilizes the energy in the high pressure gas to lift gas from the suction side (MT) moving it to the parallel compressors (IT). This provides a reduction in needed compressor capacity and energy consumption.

  • For CO₂ refrigeration systems with parallel compression
  • The best solution for warm climates
  • Optimum for system sizing from 150 kW and up

Multi Ejector - Low Pressure:

The Low Pressure Ejector recovers energy, otherwise lost in expansion, to lift the suction pressure. This reduces the consumption of the compressors.

  • For CO₂ booster systems
  • The best solution for warm climates
  • Optimum for system sizing from 40-150 kW

Multi Ejector – Liquid Ejector:

The Liquid Ejector utilizes the energy in the high pressure gas to lift liquid from the suction accumulator. It works in combination with CO₂ Adaptive Liquid Management ensuring full evaporator optimization resulting in reduced energy consumption.

  • For both CO₂ booster systems and systems with parallel compression
  • Efficient in both warm and cold climates
  • Optimum for system sizing from 40-450 kW

Multi Ejector – Combi HP/LE:

The Combi HP/LE combines benefit of the High Pressure Ejector and the Liquid Ejector, and giving you a complete solution with only one welding point needed during installation – making it even easier to get the benefits of CO₂.

  • For CO₂ refrigeration systems with parallel compression
  • The best solution for warm climates
  • Optimum for system sizing from (40 to 105 kW)

Multi Ejector Solution – now with an extended family

The Multi Ejector family have recently been extended with 6 new types making it even easier to find a perfect fit for every store and system around the world.

The Danfoss family of Multi Ejectors now consist of the following members:

  • High Pressure – 3 types (150 kW and up)
  • Low Pressure – 2 types (40-150 kW)
  • Liquid Ejector – 5 types (40- 450 kW)
  • Combi HP/LE – 3 types (40 to 105 kW)
CO₂ Adaptive Liquid Management

The new CO2 Adaptive Liquid Management (CALM) solution from Danfoss extends the portfolio of solutions for CO2 refrigeration in food retail applications. CALM includes the ground-breaking new Liquid Ejector in combination with the innovative case controller algorithm – Adaptive Liquid Control (ALC) – ensuring optimum liquid management. With CALM, the Danfoss CO2 portfolio offers solutions for all system types, store sizes and climates.

Read the press release
Danfoss CO₂ Adaptive Liquid Management

Product range

Danfoss CTM Multi Ejector Solution
CTM Multi Ejector Solution

The Danfoss Multi Ejector Solution™ ensures that transcritical CO₂ applications for retailers become energy efficient in any climate.

AK-SM 850 system manager - Danfoss
AK-SM 850 system manager

The Danfoss AK-System Manager (AK-SM) is a modern solution for the food retail markets. The AK-SM uses the latest technology to provide the maximum benefit to the end user, both in terms of energy saving optimization, control options and user friendly access.

How to choose the right Multi Ejector Solution™

There are three main factors to consider when designing your transcritical CO2 system with a Multi Ejector Solution™.

View the infogram
Infographic - How to choose the right Multi Ejector Solution™

Documents

Documents
Type Name Language Valid for Updated Download File type
Brochure A complete portfolio of CO₂ refrigeration solutions Polish Poland 27 Jun, 2023 16.7 MB .pdf
Brochure Discover the opportunities of CO2 refrigeration English Multiple 24 Nov, 2025 35.1 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions Spanish, Castilian Spain 09 Jan, 2024 25.4 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions Italian Italy 12 Dec, 2023 16.5 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail French Multiple 02 Jul, 2018 3.4 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail Ukrainian Ukraine 20 Jun, 2023 14.6 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail German Multiple 14 Jun, 2023 11.7 MB .pdf
Brochure Save energy and protect the environment with CO2 solutions - Special version for Food Retail French France 04 Aug, 2022 11.7 MB .pdf

Software

Coolselector®2: We did complex — you do awesome

Coolselector®2 features unbiased calculations for the selection of refrigeration and air conditioning components based on the user's requirements or based on standard operating conditions.

 

Coolselector®2
Coolselector®2

Case studies

The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits
The Danfoss Multi Ejector range for CO2 refrigeration: design, applications and benefits

Danfoss offers a complete portfolio of gas and liquid ejectors that provide significant benefits in CO2 refrigeration applications. Here we take a closer look at these offerings: the Multi Ejector Low Pressure (LP), the Multi Ejector High Pressure (HP), and the Liquid Ejector (LE). All three ejector products are only available as a complete Multi Ejector Solution™ where the ejector is bundled with the AK-PC 782A pack controller to provide the robust system controls necessary for efficient and reliable operation.

Evaporator injection algorithm
Selecting the right evaporator injection algorithm makes a world of difference

Danfoss has pioneered two control algorithms that help you achieve this balance. The Minimum Stable Superheat (MSS) algorithm has been an important part of the Danfoss ADAP-KOOL® offering for years and is still the ideal choice for adaptive evaporator control for dry expansion. Now Danfoss introduces the next generation: Adaptive Liquid Control (ALC).

Intelligent and adaptive control in transcritical CO2 refrigeration
Intelligent and adaptive control in transcritical CO2 refrigeration

Intelligent control solutions are important for achieving reliable, optimized operation and realizing financial savings and environmental
benefits in your transcritical CO2 refrigeration solution.

News

Danfoss is proud to declare: “We love CO₂”, and with the Multi Ejector Solution™ you will too

CO2 is often regarded as the "big problem" when it comes to climate change. While in some regards it is a hazard, in other situations it can be the answer. In fact, when used as a refrigerant, CO2 can make a big difference when it comes to keeping people, products, and our planet cool.

Read the press release
Danfoss Multi Ejector Solution - we love CO2

Support

Danfoss Multi Ejector – High Pressure – working in warm and cold ambient temperatures
Danfoss Liquid Ejector – Working in warm and cold ambient temperatures
Danfoss Multi Ejector – High Pressure – Features and benefits
Danfoss AK-PC 782A Pack Controller
Middle East's first transcritical CO2 supermarket using Danfoss ejector technology
Danfoss Multi Ejector – Low Pressure – Working in warm and cold ambient temperatures
Danfoss Liquid Ejector solution – Introduction to the ejector portfolio
Danfoss Multi Ejector – Ejectors & Strainers
Danfoss Multi Ejector Solution – How it works