Abstract: A refrigerant apparatus having a compressor, a condenser, an expansion value, evaporator and an oil repellent coat. An oil repellent coat is coated inside of a low pressure refrigerant passage which lubricant is easy to adhere so that lubricant is prevented from staying inside of the refrigerant passage. Since the oil repellant coat is low affinity for oil, luricant forms guttulate on the oil repellent coat by surface tension. Since the guttulate is easy to move on the inside wall with a flow of the refrigerant, it is prevented lubricant from staying on the inside wall.

Abstract: An electric garbage disposer of a construction comprising a container means having an opening defined therein and made of microwave shielding material; and a garbage receptacle having a receiving mouth defined therein and made of material having both of a microwave permeable property and a gas permeable property. The garbage receptacle is adapted to be removably accommodated within the container means with the mouth substantially aligned with the opening of the container means. A microwave generating means is used for radiating microwaves into the container means to heat garbage contained in the garbage receptacle within the container means. A water component produced by the garbage as a result of microwave heating is drained to an outside of the garbage disposer.