发明授权
US5970723A Heating and cooling unit 失效
加热和冷却单元

Heating and cooling unit
摘要:
An apparatus for maintaining an enclosed space proximate a selected comfort range, and for conserving utilities, the apparatus comprising a housing in communicating relation with the enclosed space and the external environment and having an evaporative cooler for cooling the enclosed space and having a predetermined operating efficiency, and a spaced apart air conditioner for either selectively cooling or heating the enclosed space and having an operating efficiency different from the evaporative cooler, and a control mechanism for automatically and selectively switching back and forth from operation of the evaporative cooler to the air conditioner.
公开/授权文献
信息查询
0/0