Plate heat exchanger is a kind of high efficiency heat exchanger which is composed of a series of corrugated metal sheets. A thin rectangular channel is formed between various plates for heat exchange. Plate heat exchanger is a kind of high efficiency heat exchanger which is composed of a series of corrugated metal sheets. A thin rectangular channel is formed between various plates for heat exchange. Plate heat exchanger is a kind of high efficiency heat exchanger which is composed of a series of corrugated metal sheets. A thin rectangular channel is formed between various plates for heat exchange. Plate heat exchanger is a kind of high efficiency heat exchanger which is composed of a series of corrugated metal sheets. A thin rectangular channel is formed between various plates for heat exchange. Plate heat exchanger is a kind of high efficiency heat exchanger which is composed of a series of corrugated metal sheets. A thin rectangular channel is formed between various plates for heat exchange.