Suction heat exchanger

The helically-formed suction heat exchanger improves heat transfer and efficiency by raising suction gas temperature, reducing compressor work and energy consumption.

EP4764359A1Pending Publication Date: 2026-06-24LIGHT ABSORBER AB
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
LIGHT ABSORBER AB
Filing Date
2025-11-06
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

Existing suction heat exchangers in refrigeration systems are inefficient in transferring heat, leading to sub-zero temperatures at the compressor inlet, which increases energy consumption.

Method used

A suction heat exchanger design featuring helically-formed outer and inner pipes, with the inner pipe flowing in the opposite direction to the outer pipe, enhancing heat transfer and allowing for a compact design, and optionally including a cover, insulation, and flanges for improved efficiency.

Benefits of technology

The design raises the suction gas temperature above zero Celsius, reducing the work required by the compressor and achieving energy savings.

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Abstract

A suction heat exchanger (1, 1') is disclosed. The heat exchanger (1. 1') comprises an outer pipe (3) and at least one inner pipe (5, 5') arranged inside and along the outer pipe (3). The outer pipe (3) is connectable to an evaporator and to a compressor (9) configured to achieve a flow of a medium through the outer pipe (3). The at least one inner pipe (5, 5') is configured for the medium to flow through the at least one inner pipe (5) in an opposite direction to the direction of the flow of the medium when flowing through the outer pipe (3). The outer pipe (3) and the at least one inner pipe (5, 5') are helically-formed around an axis (a) to form helical paths for the medium to flow through the outer pipe (3) and through the at least one inner pipe (5, 5'). A method (100) for manufacturing a suction heat exchanger (1, 1') is also disclosed.
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