A combination plate heat exchanger is a type of heat exchanger that combines the features of both gasketed plate heat exchangers and brazed plate heat exchangers. In this type of heat exchanger, one portion of the plates is connected using gasketed seals, forming sealed channels suitable for medium to low pressure and temperature conditions. The other portion of the plates is connected through brazing, creating more robust channels suitable for high-pressure and temperature conditions. This combination allows different working conditions for various zones within the same heat exchanger.

Plate Heat Exchanger (abbreviated as PHE), is a type of heat exchanger used to transfer heat between two fluids. It typically consists of a series of parallel-arranged metal plates with gaps between them, allowing two fluids to exchange heat without direct mixing. This design enables efficient heat transfer while maintaining fluid separation.

Essentially, the working principle of a plate heat exchanger involves one fluid flowing on one side of the metal plates while the other fluid flows on the other side of the plates, allowing heat to be transferred between them. The corrugated design of the metal plates increases the surface area, thereby enhancing heat exchange efficiency.

Efficient Heat Transfer: Due to the small gaps between plates and the corrugated structure, heat exchange efficiency is very high, enabling fluids to transfer heat rapidly.
Smaller Footprint: Compared to traditional shell-and-tube heat exchangers, plate heat exchangers occupy less space, which is particularly useful in limited areas.
Easy Cleaning and Maintenance: The structure of plate heat exchangers makes them relatively easy to disassemble and clean, maintaining high operational efficiency.
Flexibility: The modular design of plate heat exchangers allows for expansion or reduction according to needs, adapting to different applications.
Plate heat exchangers are widely used in various industries including heating, cooling, food processing, chemical engineering, energy production, etc., for transferring energy or regulating fluid temperatures.