Air energy water heater

An air energy water heater includes: a heat exchanger including a refrigerant circulation side and a water heating side; an expansion valve, an air heat exchanger, a compressor and a four-way valve; the refrigerant circulating side of the heat exchanger, the expansion valve, the air heat exchanger and the compressor are sequentially and circularly connected, and the four-way valve is connected with the air heat exchanger, the compressor and the refrigerant circulating side of the heat exchanger. The air energy water heater can achieve the functions of water heating and defrosting, and is simple in structure, convenient to use and maintain and low in cost. 一种空气能热水器，包括：热交换器，其包括制冷剂循环侧和水加热侧；膨胀阀、空气换热器、压缩机和四通阀；热交换器的制冷剂循环侧、膨胀阀、空气换热器、压缩机依次循环连接，四通阀分别与空气换热器、压缩机和热交换器的制冷剂循环侧连接。本实用新型的空气能热水器，能够实现热水和除霜功能，结构简单，便于使用和维修，且成本较低。