Micro channel heat exchanger and heat pump water heater

Abstract

A micro channel heat exchanger of the invention relates to the technical field of heat exchange, and aims to provide the micro heat exchanger being simple in structure, high-efficiency in heat exchange and safe and reliable and a heat pump water heater. The micro channel heat exchanger comprises a first collecting pipe, a second collecting pipe, a third collecting pipe and a plurality of flat pipes, and a first connecting port, a second connecting port and a third connecting port which communicate with a system pipeline are formed in the first collecting pipe, the second collecting pipe and the third collecting pipe correspondingly; the third collecting pipe is arranged between the first collecting pipe and the second collecting pipe, the flat pipes are used for enabling the first collecting pipe and the third collecting pipe to communicate and enabling the second collecting pipe and the third collecting pipe to communicate; and directions of refrigerant in and out at the first connecting port and the second connecting port are identical and are both opposite to directions of refrigerant in and out at the third connecting port, a first flowing route is formed by the first collecting pipe, the third collecting pipe and the flat pipes between the first collecting pipe and the third collecting pipe, and a second flowing route is formed by the second collecting pipe, the third collecting pipe and the flat pipes between the second collecting pipe and the third collecting pipe.

Description

technical field [0001] The invention relates to the technical field of heat exchange, in particular to a microchannel heat exchanger and a heat pump water heater. Background technique [0002] Due to its large contact area, high heat transfer performance, small pressure loss, compact structure and cost advantages, micro-channel heat exchangers are gradually being used in commercial and domestic refrigeration systems. At present, the water tank heat exchanger of the wall-mounted air energy heat pump water heater mostly adopts the micro-channel heat exchanger. [0003] Existing microchannel heat exchangers, refer to Figure 1-4 , generally consists of two headers 10' and a plurality of flat tubes 40' containing micropores. The collecting pipes are installed at both ends of the flat pipes, and a plurality of flat pipes are structurally installed in parallel, and the microchannels are divided into multiple flow paths through the spacers 60' of the collecting pipes. By one or m...

AI Technical Summary

Problems solved by technology

Multiple flow paths form a series relationship through the diaphragm, then the refrigerant in the micro-channel heat exchanger will frequently exchange heat with high-temperature water, and the purpose of the micro-channel heat exchanger is to heat the water in the water tank, that is, to exchange with cold water Therefore, frequent heat exchange with high-temperature water will cause problems such as low heat exchange efficiency of the heat exchanger and high system pressure

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