摘要:
The invention relates to a refrigerating device (1) provided with a hollow-walled housing (2), which surrounds a storage compartment (9), and a vacuum pump (13) which is connected to a hollow chamber of the housing (2) via a suction line (14). The suction line (14) is also connected to the storage compartment (9).
摘要:
An oil holding tank (40) is communicated to the case (10c) of the compressor (10). Part of the refrigerant discharged from the compressor (10) is introduced into the oil holding tank (40) so that the lubrication oil (L) is allowed to flow out from the oil holding tank (40) and the lubrication oil (L) which flows out is allowed to return to the case (10c). The presence of the lubrication oil (L) is detected from a comparison between the temperature (TK1) of the refrigerant introduced from the compressor (10) to the oil holding tank (40) and the temperature (TK2) of the lubrication oil (4) flowing out from the oil holding tank (40). On the basis of the result of the detection, it is judged whether or not the amount of the lubrication oil (L) in the case (10c) is appropriate.
摘要:
A thermal insulation bag (1) for vacuum-pckaging micropowder material (12) comprises a multi-layer sheet having thermoweldable plastics layers (8, 10) and an intermediate metal layer (9). To prevent heat conduction through the metal layer from one side of the bag to the other side, the metal layer is of smaller dimensions than the other layers so that the sealed edges (3) do not comprise the metal layer edges. For positioning and fixing purposes the metal layer (9) only comprises small tabs 9A which are sealed between the plastics layers (8, 10).
摘要:
An evacuated insulation unit and a method of manufacturing the same. A zeolite adsorbent is degassed in a vacuum stete. The degassed zeolite adsorbent is sealingly packed in a gas impermeable bag in an atmosphere of an adsorption- prod gas. Then, the gas impermeable bag is provided with a communication hole. After the communication hole is provided, the gas impermeable bag is placed into a plastic bag so as to communicate to the plastic bag through the communication hole. A heat insulating material and activated carbon are also placed into the plastic bag. The plastic bag which contains the gas impermeable bag, the heat insulating material and the activated carbon is evacuated immediately after the provision of the communication hole to the gas impermeable bag so that air is prevented from entering the gas impermeable bag. The plastic bag is sealed during evacuation thereof to thereby produce the evacuated insulation unit.