Machine head assembly and heat pump water heater

The utility model discloses a machine head assembly and a heat pump water heater. The machine head assembly comprises a shell provided with a first air opening and a second air opening; the bent heat exchanger is arranged in the shell; and the fan assembly is arranged in the shell. The machine head assembly and the fan assembly rotate forwards, and an air beam flowing from the first air opening to the second air opening through the heat exchanger and the fan assembly in sequence is formed in the shell; the fan assembly rotates reversely, and a wind beam flowing from the second air opening to the first air opening sequentially through the fan assembly and the heat exchanger is formed in the shell; due to the fact that the heat exchanger is of the bent structure, compared with a straight-row heat exchanger, the length of the bent heat exchanger can be larger, the air passing area of the bent heat exchanger is larger, the heat exchange efficiency is higher, the speed of air passing through the heat exchanger is smaller, the air noise generated by the heat exchanger is smaller, and the performance of the heat pump water heater can be effectively improved through the scheme.