| 摘要 |
<p>The invention relates to a method and to an arrangement (1) for enabling refrigerants, preferably freons, to be emptied from refrigeration systems or heat pump systems (9) with the aid of piston compressor pumps (2) when repairing or scrapping such systems. According to the invention, the compressor suction line (6) nearest the compressor is connected to one chamber of a heat exchanger (4) and a pressure reduction valve (5) is connected in the suction line upstream of the heat exchanger. The pressure line extending from the compressor pump (2) passes to an oil separator (3) and from there to the other chamber of the heat exchanger (4). The fall in pressure in the reduction valve (5) and heating of the refrigerant in the heat exchanger (4) means that the refrigerant will be in a gaseous state when reaching the compressor, which is a prerequisite for safe action of the compressor. The pressure increase achieved in the compressor pump (2) and cooling of the refrigerant in the heat exchanger (4) enables the refrigerant to be delivered to a container (8) in preferably a liquid state.</p> |
