| 摘要 |
The invention relates on the one hand to a device for spraying carbon-dioxide snow into a freezing or cooling chamber, comprising - a reservoir for liquid carbon-dioxide; - one or more expansion nozzles (2a, 2b, 2c) for producing the carbon-dioxide snow from liquid carbon-dioxide and introducing the snow into the freezing or cooling chamber;.- a supply line (3) for transporting the liquid carbon-dioxide from said reservoir to the expansion nozzles (2a, 2b, 2c); - a manual opening/closing valve (4) to introduce a flow of liquid carbon-dioxide under pressure from the reservoir into the supply line (3); in which a proportional valve (5) is provided in the supply line (3) for continuously adjusting the quantities of liquid carbon-dioxide introduced into the expansion nozzles (2a, 2b, 2c) and said expansion nozzles (2a, 2b, 2c) are one-way valves. On the other hand, the invention relates to the use of a one-way valve as an expansion nozzle (2a, 2b, 2c) for such a device. |
