Evaporator/Condenser Coil for Packaged Unit Components

Evaporator/Condenser Coil for Packaged Unit Components

Evaporator/Condenser coil for Packaged Unit Components refers to the evaporator coil and condenser coil in packaged air - conditioning or refrigeration units, which are key components for heat exchange. The following is an introduction:

Evaporator Coil

Function: Its main function is to absorb heat, making the refrigerant change from a liquid state to a gaseous state to achieve a refrigeration effect. For example, in a household air - conditioner, the coil in the indoor unit is an evaporator. When the liquid refrigerant flows through it, it absorbs the heat in the indoor air, causing the surrounding temperature to drop, and at the same time, the refrigerant evaporates into a low - temperature and low - pressure gas.

Structural Features: Usually, it adopts a design of multiple rows of copper tubes with aluminum fins to increase the contact area with air and improve the heat absorption efficiency. In some low - temperature equipment such as cold storage, stainless steel is used to prevent corrosion, while household equipment mostly uses a combination of copper tubes and aluminum fins. The capillary throttling device is often directly connected to the inlet of the evaporator to control the refrigerant flow through pressure drop.

Condenser Coil

Function: The role of the condenser coil is to transfer the heat released by the high - temperature and high - pressure gaseous refrigerant to the external medium (air or water), condensing it into a liquid state. Taking an air - conditioner outdoor unit as an example, the high - temperature refrigerant gas discharged by the compressor dissipates heat to the outside here and gradually condenses into a high - pressure liquid.

Structural Features: Industrial - grade condensers mostly adopt a shell - and - tube structure, with dense cooling water pipes arranged inside. The fin pitch of air - cooled condensers is usually larger than that of evaporators to adapt to the need for smoother heat dissipation in high - temperature environments. In some high - temperature working conditions, heat - dissipating fans or spraying devices will be added.

Common Materials and Structures

Materials: The coils are usually made of seamless copper tubes, and the fins are made of aluminum plates. This combination has good heat - transfer performance and corrosion - resistance.

Structure: The tubes are mechanically bonded into the aluminum plate - type fins, and full - drawn collars are used to completely cover the tubes to improve operating efficiency.