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CENTRAL VACUUM COOLING PLANT.
专利权人:
FLSMIDTH A/S
发明人:
LOUIS S. SCHWARTZ
申请号:
MX2011005824
公开号:
MX2011005824A
申请日:
2011.06.02
申请国别(地区):
MX
年份:
2012
代理人:
摘要:
Described is a method as well as an apparatus for vacuum cooling of food produce through moisture removal, which method comprising the steps of loading the food produce to be cooled into a vacuum chamber, lowering the pressure inside the vacuum chamber to a predetermined pressure level and maintaining the vacuum chamber at this predetermined pressure level both by removing air through a vacuum pump system for a sufficient of time to allow heat transfer out of the food produce to take place, and condensing water vapor inside the vacuum chamber through a refrigeration system. The method and apparatus is unique in that the step of lowering the pressure inside the vacuum chamber to the predetermined pressure level is carried out using a single stage vacuum pump and the step of maintaining the vacuum chamber at this predetermined pressure level is carried out using a two stage vacuum pump. There is obtained a significant energy saving, which mainly is caused by splitting up the pressure lo wering and maintaining steps into two distinct phases in which specifically sized vacuum pumps are used to most efficiently draw the required vacuum during the cooling process. Thus, the single stage vacuum pump used for the pressure lowering step has no high pressure stage that is idling during this step, meaning there is a net power saving or alternatively an increase in performance. Further, the two stage vacuum pump maintaining the pressure in the vacuum chamber for the required duration may be very small having very low displacement and thus low power consumption. In addition, splitting up the pressure lowering and maintaining steps into two distinct phases makes it possible to operate more vacuum chambers simultaneously in any combination, i.e. where some vacuum chambers are in the pressure lowering step others may be in the pressure maintaining step.Se describe un método, así como un aparato para el enfriamiento al vacío de productos alimenticios mediante la remoción de humedad,
来源网站:
中国工程科技知识中心
来源网址:
http://www.ckcest.cn/home/

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