Heat pump type is suitable for hot summer and cold winter areas.It uses the principle of air conditioning refrigeration in summer, that is, air conditioning in summer is indoor refrigeration, outdoor heat dissipation, while in autumn and winter, the direction is opposite to summer, indoor heating, outdoor refrigeration to achieve the purpose of heating. Its advantage is high efficiency, but its disadvantage is that the temperature range is small. Generally, when the temperature is below 5 degrees below zero, it will stop working.