The invention belongs to the technical field of vehicle air conditioners, and particularly relates to a non-stop
defrosting method of an air conditioner for parking and running of an overhead integrated
heat pump motor home and an
air conditioning device.The method comprises the steps that the air conditioner runs in a heating mode, the current environment and equipment parameters A are detected, and whether an
evaporator on the outdoor side of the air conditioner has the frosting risk or not is judged; if yes, the
control system enters a first
defrosting mode to operate; in the first
defrosting mode, the air conditioner body operates in a heating mode, and meanwhile cooling water of an engine and / or auxiliary diesel heating water are / is used as defrosting water to heat an
evaporator, so that defrosting and
auxiliary heating treatment is conducted on the
evaporator; the water heat exchange coil
pipe communicated with an engine cooling
system or an auxiliary diesel
heating system is additionally arranged at the outdoor evaporator, heat such as engine
waste heat is directionally conveyed to the outer side of the evaporator, and efficient heat exchange with the
outer coil pipe is achieved; and obvious technical advantages can be realized from the aspects of frosting prevention and control, low-temperature heating,
system efficiency, operation reliability, comfort, energy utilization and the like.