| 摘要 |
The present invention relates to a vacuum box for two stage evaporation of a heat pump. According to the present invention, the vacuum box (10) for increasing the evaporative efficiency of refrigerant condensed by heating an inside evaporator from the outside comprises: an upper evaporator (20) installed in the upper part; a lower evaporator (40) installed in the lower part; a heating case (11), where refrigerant inserting and extracting pipes, which are respectively connected to the upper evaporator (20) and the lower evaporator (40), are connected to an outside; a mixed liquid (12) of alcohol and distilled water stored in the lower part of the heating case (11); and electricity heat (30) dipped in the mixed liquid (12). According to the present invention, the vacuum box serves as an evaporator, so a sub-condenser for removing hot gas is unnecessary. The present invention has an effect for increasing the efficiency of an apparatus by using the hot gas, which was wasted, as an evaporation heat source; and reducing time to use heat for defrosting, and producing high temperature water by solving a problem, such as liquid compression and wet compression. |
