| 摘要 |
<p>A pipe freezing device comprises a compressor 1, condenser 3 and an expansion chamber 9. Refrigerant is pumped by the compressor 1 through the condenser 3 to the expansion chamber 9 via a capillary 8. The refrigerant entering the chamber 9 expands, cooling the walls of the chamber, and is pumped back to the compressor through return pipe 10. The expansion chamber is attached to a pipe, e.g. by clamping, to freeze the contents of the pipe.</p> |
