When the electrical control cabinet of any kinds of machining equipments,large electrical control system and communication system running,it will produce much heat, result in raising the inside temperature of the control cabinet,so as to affect the stability and reliability  of  the  cabinet components.The cabinet can also be affected by the humidity air due to the seasons change or the allocation environment, in order to maintain the normal work of the equipment,it's necessary to regulate and control the temperature and humidity of the control cabinet, prolong the electrical components life time,as well as improve the equipments running reliability.