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coil heat exchanger manufacturer in china:zibo qiyu

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Zibo Qiyu Air-conditioning Equipment Co., Ltd. is a known manufacturer in China specializing in coil heat exchangers and related HVAC components.

Here's a quick overview:

  • Location: Zibo City, Shandong Province, China

  • Main products:

    • Air coil heat exchangers (like copper tube–aluminum fin coils)

    • Condensers

    • Evaporators

    • Dry coolers

    • Other customized HVAC heat transfer equipment

  • Applications: widely used in air handling units (AHUs), rooftop units, heat pumps, refrigeration systems, industrial ventilation, etc.

  • Features:

    • They usually offer both standard and customized designs.

    • Good at using different materials (like hydrophilic aluminum fins, stainless steel tubes, anti-corrosion coatings).

Zibo Qiyu is not as big as brands like Dunham-Bush or Hisense HVAC, but they are quite flexible for OEM/ODM orders, and their pricing is usually competitive, especially for project-based bulk supply.

air to air heat pump how does it work

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An air-to-air heat pump works by transferring heat between the outside air and the inside air to either heat or cool a building. Here's a simple breakdown:

  1. Heating Mode (winter):

    • Even when it's cold outside, there is still some heat energy in the air.

    • The heat pump extracts that heat using a refrigerant that evaporates at low temperatures.

    • The refrigerant absorbs heat from the outside air, becomes a gas, and is compressed, which raises its temperature even more.

    • This hot refrigerant gas moves inside and releases its heat into the indoor air through a heat exchanger (basically like a radiator).

    • After releasing the heat, the refrigerant cools down, turns back into a liquid, and the cycle repeats.

  2. Cooling Mode (summer):

    • The cycle is reversed.

    • The heat pump extracts heat from inside the building and releases it to the outside.

    • This cools down the indoor air, working like an air conditioner.

Main parts of an air-to-air heat pump:

  • Outdoor unit: captures or dumps heat to the outside air.

  • Indoor unit: releases or captures heat inside the house.

  • Compressor: increases the pressure and temperature of the refrigerant.

  • Expansion valve: lowers the pressure of the refrigerant so it can absorb heat again.