Huawei's indirect evaporative cooling system, such as the EHU9000 series, operates without a mechanical refrigeration cycle. Its primary components include fans to move supply and exhaust air, a heat exchanger (core) to transfer heat between air streams, a water pump and spray system to wet the secondary side of the heat exchanger for evaporation, and air filters to ensure air quality and protect the core. A compressor is a key component of a direct expansion (DX) or chiller system, not an evaporative cooling unit.

A. Compressor: This is a core component of vapor-compression refrigeration systems (like DX units or chillers), which are fundamentally different from evaporative cooling systems.

1. Huawei Technologies Co., Ltd. (2022). EHU9000-A(050, 100) Indirect Evaporative Cooling Unit User Manual. Section 2.2 "Structure and Components", pages 4-5. This document details the main components, explicitly listing the EC fan, heat exchanger, water pump, spray nozzles, and filters, while showing no compressor in the system diagram.