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| {{Use dmy dates|date=January 2014}} | {{Use dmy dates|date=January 2014}} | ||
| A '''vacuum fryer''' is a ] device housed inside a ] chamber. It was originally developed for ] production.{{ |
A '''vacuum fryer''' is a ] device housed inside a ] chamber. It was originally developed for ] production.{{citation needed|date=December 2016}} | ||
| Vacuum fryers are fit to process low-quality ]es that contain higher sugar levels than normal, as they frequently have to be processed in spring and early summer before the potatoes from the new ] become available. With vacuum frying it is easier to maintain natural colors and flavours of the finished product. Due to the lower ]s applied (approx. {{convert|130|°C|°F}}), the formation of suspected ] ] is significantly lower than in standard atmospheric fryers, where the frying temperature is approx. {{convert|170|°C|°F}}. The ] absorption of the products is also reported to be lower than in atmospheric fryers. In South East Asia (mainly ], ], ] and ]) batch type vacuum fryers are mainly used for the production of fruit chips. However, these machines are only appropriate for relatively small production companies.<ref>{{Cite journal|last=Granda|first=C.|last2=Moreira|first2=R.g.|last3=Tichy|first3=S.e.|date=2004-10-01|title=Reduction of Acrylamide Formation in Potato Chips by Low-temperature Vacuum Frying|url=http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2621.2004.tb09903.x/abstract|journal=Journal of Food Science|language=en|volume=69|issue=8|pages=E405–E411|doi=10.1111/j.1365-2621.2004.tb09903.x|issn=1750-3841}}</ref> | Vacuum fryers are fit to process low-quality ]es that contain higher sugar levels than normal, as they frequently have to be processed in spring and early summer before the potatoes from the new ] become available. With vacuum frying it is easier to maintain natural colors and flavours of the finished product. Due to the lower ]s applied (approx. {{convert|130|°C|°F}}), the formation of suspected ] ] is significantly lower than in standard atmospheric fryers, where the frying temperature is approx. {{convert|170|°C|°F}}. The ] absorption of the products is also reported to be lower than in atmospheric fryers. In South East Asia (mainly ], ], ] and ]) batch type vacuum fryers are mainly used for the production of fruit chips. However, these machines are only appropriate for relatively small production companies.<ref>{{Cite journal|last=Granda|first=C.|last2=Moreira|first2=R.g.|last3=Tichy|first3=S.e.|date=2004-10-01|title=Reduction of Acrylamide Formation in Potato Chips by Low-temperature Vacuum Frying|url=http://onlinelibrary.wiley.com/doi/10.1111/j.1365-2621.2004.tb09903.x/abstract|journal=Journal of Food Science|language=en|volume=69|issue=8|pages=E405–E411|doi=10.1111/j.1365-2621.2004.tb09903.x|issn=1750-3841}}</ref> | ||
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| The vacuum is created by ]s, and the whole system is controlled by a ]. | The vacuum is created by ]s, and the whole system is controlled by a ]. | ||
| In batch fryers, the frying oil has to be replaced quite often as it is sensitive to temperature changes. Continuous vacuum fryers lead to a longer lifetime of the frying oil and therefore lower the production costs. Vacuum fryers can also reduce oil content in fried foods. The amount of reduced oil content, usually 1–3%, depends on the type of vacuum fryer.{{ |
In batch fryers, the frying oil has to be replaced quite often as it is sensitive to temperature changes. Continuous vacuum fryers lead to a longer lifetime of the frying oil and therefore lower the production costs. Vacuum fryers can also reduce oil content in fried foods. The amount of reduced oil content, usually 1–3%, depends on the type of vacuum fryer.{{Citation needed|date=December 2016}} | ||
| ==See also== | ==See also== | ||
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| |accessdate=17 September 2012 | |accessdate=17 September 2012 | ||
| }} | }} | ||
| ==Further reading== | ==Further reading== | ||
| * {{cite book|last1=Henry C. Dethloff, |
* {{cite book|last1=Henry C. Dethloff, Stephen W. Searcy|title=Engineering Agriculture at Texas A&M: The First Hundred Years|date=2015|isbn=1623492890|url=https://books.google.de/books?id=EnJ8BgAAQBAJ|accessdate=8 December 2016}} | ||
| ] | ] | ||
| ] | ] | ||
Revision as of 12:21, 9 December 2016
A vacuum fryer is a deep-frying device housed inside a vacuum chamber. It was originally developed for potato chip production.
Vacuum fryers are fit to process low-quality potatoes that contain higher sugar levels than normal, as they frequently have to be processed in spring and early summer before the potatoes from the new harvest become available. With vacuum frying it is easier to maintain natural colors and flavours of the finished product. Due to the lower temperatures applied (approx. 130 °C (266 °F)), the formation of suspected carcinogen acrylamide is significantly lower than in standard atmospheric fryers, where the frying temperature is approx. 170 °C (338 °F). The fat absorption of the products is also reported to be lower than in atmospheric fryers. In South East Asia (mainly Philippines, Thailand, China and Indonesia) batch type vacuum fryers are mainly used for the production of fruit chips. However, these machines are only appropriate for relatively small production companies.
Continuous vacuum fryers
For larger production quantities, continuous vacuum fryers are available. In these installations, the vacuum frying pan is installed in a stainless steel vacuum tube. The infeed of the raw product is carried out through a rotary air lock. Depending on the application, the frying pan itself is designed to meet the different product specifications. A transport belt takes the finished product out of the fryer and towards the outfeed system. A lock chamber at the exit of the vacuum tube prevents air from entering the vacuum zone, and a belt system takes the product from one zone to another.
The vacuum is created by vacuum pumps, and the whole system is controlled by a programmable logic controller.
In batch fryers, the frying oil has to be replaced quite often as it is sensitive to temperature changes. Continuous vacuum fryers lead to a longer lifetime of the frying oil and therefore lower the production costs. Vacuum fryers can also reduce oil content in fried foods. The amount of reduced oil content, usually 1–3%, depends on the type of vacuum fryer.
See also
References
- Granda, C.; Moreira, R.g.; Tichy, S.e. (1 October 2004). "Reduction of Acrylamide Formation in Potato Chips by Low-temperature Vacuum Frying". Journal of Food Science. 69 (8): E405–E411. doi:10.1111/j.1365-2621.2004.tb09903.x. ISSN 1750-3841.
- "91C-19 Vacuum frying of potato chips". 11 March 2012. Retrieved 8 December 2016.
- "Airfryer, gezonder frituren - alle informatie op airfryervergelijken.nl". Airfryervergelijken.nl (in Dutch). Retrieved 8 December 2016.
External links
- "Harvest Bay uses vacuum frying for snack products". The World of Food Science. Institute of Food Technologists. 8 November 2002. Retrieved 17 September 2012.
Further reading
- Henry C. Dethloff, Stephen W. Searcy (2015). Engineering Agriculture at Texas A&M: The First Hundred Years. ISBN 1623492890. Retrieved 8 December 2016.