The invention discloses low-reversing reliability and frequency method for controlling a four-way valve, which comprises control processes under the following use conditions: during
heat generation, time A is determined according to an ambient temperature and an unloading
electromagnetic valve is turned off at the same time, then the
cold air-resistance operation of an indoor fan and an
inverter compressor are started, a
pilot valve of a four-way wave is turned on to act when the
inverter compressor operates for 180+A seconds, and the four-way valve realizes inversion and an outdoor fan operates at the same time; for
machine stop during
heat generation, the
inverter compressor and the outdoor fan are turned off first, then the unloading
electromagnetic valve is turned on to allow an
exhaust pipe and an intake
pipe to be communicated continuously for time B, and finally the
pilot valve of the four-way valve is controlled to be turned off to reset and the indoor fan is turned off at the same time, wherein the time B is between 5 and 15 seconds; and during
heat regeneration, the unloading
electromagnetic valve is turned off first and the
pilot valve of the four-way valve is controlled to be turned on to act at the same time, then the
inverter compressor is started, and the indoor fan starts
cold air-resistance operation and the outdoor fan starts operation when the
inverter compressor operates for 180 seconds.