| 摘要 |
<p>1,268,967. Refrigerating. UNION CARBIDE CORP. 30 June, 1965 [1 July, 1968), No. 32857/69. Heading F4H. Liquefied gas from a container 14 is vaporized by heat exchange at 22 with gas circulated in a meat carrying truck 11, and the resultant vapour is passed into the circulating gas through a spray pipe 36. A valve 16 in the liquid line leading from the container 14 controls dispensing of the liquefied gas to maintain the truck temperature as sensed at 17 at a selected level between 35‹ and 50‹ F. Moisture from the gas stream which has condensed on the heat exchanger 22 is collected at 26 and discharged through a pipe 27 so that a dry atmosphere is maintained in the truck to avoid the surface of the meat becoming undesirably wet. The fan 25 which circulates the gas may be driven by an electric motor, Fig. 2 (not shown), or by a second stream of vapour derived from the container 14, Fig. 3 (not shown). The truck from the container 14, Fig. 3 (not shown). The truck door may be associated with a switch, Fig. 4 (not shown), so that when the door is opened, the fan 25 is stopped and the valve 16 closed, and when the door is closed, the fan 25 is started but the valve 16 is prevented by a time delay device from opening for a predetermined time. Any frost which has accumulated on the heat exchanger 22 is thus allowed to clear before liquid is admitted to the heat exchanger.</p> |
