WO1997006698A1 - Method of frying using little fat - Google Patents
Method of frying using little fat Download PDFInfo
- Publication number
- WO1997006698A1 WO1997006698A1 PCT/EP1996/003537 EP9603537W WO9706698A1 WO 1997006698 A1 WO1997006698 A1 WO 1997006698A1 EP 9603537 W EP9603537 W EP 9603537W WO 9706698 A1 WO9706698 A1 WO 9706698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fat
- frying
- fried food
- hot
- deep
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L19/00—Products from fruits or vegetables; Preparation or treatment thereof
- A23L19/10—Products from fruits or vegetables; Preparation or treatment thereof of tuberous or like starch containing root crops
- A23L19/12—Products from fruits or vegetables; Preparation or treatment thereof of tuberous or like starch containing root crops of potatoes
- A23L19/18—Roasted or fried products, e.g. snacks or chips
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L5/00—Preparation or treatment of foods or foodstuffs, in general; Food or foodstuffs obtained thereby; Materials therefor
- A23L5/10—General methods of cooking foods, e.g. by roasting or frying
- A23L5/11—General methods of cooking foods, e.g. by roasting or frying using oil
- A23L5/12—Processes other than deep-frying or float-frying using cooking oil in direct contact with the food
Definitions
- the invention relates to a method for frying with little fat for the production of fried foods, in particular French fries.
- the prior art it has been customary to produce deep-fried dishes by means of immersion deep-frying processes.
- the fried food is immersed in a hot oil bath.
- This oil bath has temperatures of around 190 ° C.
- the cooking fat has three functions. It is used for the formation of flavors by the formation of crusts, the cooking of the fried food inside, and it also serves to conduct heat from the heating source to the fried food and is also a heat store. It is important that the heating surfaces in the frying fat do not become significantly hotter than 200 ° C, since otherwise the thermal decomposition of the fat in the contact area with the heating surfaces will be accelerated too much.
- the hot freezing fat is also exposed to harmful thermal stress even when the deep-fryer is at rest, since in this state there is no movement of the frying fat, which leads to overheating and permanent thermal stress on the fat in the contact areas with the heating surfaces, so that in these areas a considerably faster and stronger decomposition of the frying fat can be observed.
- the food prepared by deep-frying generally has a relatively high proportion of water before it is cooked. This is particularly true of french fries.
- the deep-frying product is introduced into the hot frying fat of the immersion deep fryer, there is an explosive evaporation of the surface of the frying pan after an initial heating-up phase.
- the actual deep-frying begins only when the phase of the initially bubbly escape of water vapor has ended, the hot fat heating the surfaces of the deep-fried goods with the necessary deep-frying temperature of 150 to 180 ° C. and the taste-forming crusts from fat and freezing goods are formed.
- This delayed start of the actual deep-frying process is extremely disadvantageous when deep-frying in the immersion process.
- Many developments in the field of prior art in the field of deep-frying technology therefore attempt to start the deep-frying process as quickly as possible and to make the overall temperature distribution more uniform. This is necessary because the uncontrolled buoyancy movements and the different flow resistances inside the deep-fried goods are so uneven that the outer portions are fried faster than the inner portions of the deep-fried goods.
- the common immersion frying methods try to solve these problems by simply using a larger amount of fat in relation to the fried food. This leads to a quicker introduction of the optimal temperature to the food and to a quicker start of the frying process after the steam development. However, this means that there is a higher overall fat throughput and higher amounts of used fat. Higher energies are also required to heat the frying fat.
- a 15 l deep fryer with weekly grease replacement after 45 to 60 hours of operation requires approximately 750 kg of fat a year, although a grease exchange after 20 hours of operation would be optimal.
- Such an immersion fryer is described, for example, in DE 32 41 008 AI. It is a deep-fryer with a container and a heater for the deep-frying medium located therein. This fryer also has a forced circulation device in which the fat or oil is circulated and heated. A sieve or a filter can preferably be installed in the flow channels of the circulation devices in order to filter the fat used.
- DD 13120 describes a device for continuous frying fat cleaning on fish frying devices, a frying fat circuit being provided in which the fat used is passed through a coarse filter and an exchangeable sieve and a fine filter, with an oil preheater being arranged subsequently.
- DE 30 02 114 AI finally describes a device for deep-frying lumpy foods such as French fries, these being arranged on a conveyor belt and being heated by heat radiation, for example infrared rays. In principle, it is provided that no oil or fat is used for this process. However, it is described that the fried food can additionally be sprayed with oil or fat from a spray device.
- a method for frying with fat which is characterized in that the fried food is poured over with hot fat or sprayed with hot fat and the hot frying fat runs off over the fried food.
- the frying fat can have a temperature in the range from 130 to 190 ° C., 175 to 180 ° C. being particularly preferred.
- the deep-frying process is carried out in such a way that the deep-frying fat is circulated and is heated to temperatures of 130 to 190 ° C. before being applied to the fried food.
- the frying fat discharged with the food to be fried is preferably replaced by fresh frying fat.
- the frying fat can be collected after flowing through the fried food and filtered in the reflux.
- the frying fat preferably flows through the bottom of the frying basket, a filter for filtering the frying fat being arranged in a further embodiment in the bottom of the frying basket.
- the frying fat is conveyed by means of a pump with a delivery rate of more than 2 liters per minute per 100 g of fried food and is poured onto the fried food at this speed or sprayed through spray nozzles. It is further preferred that after pouring or spraying with hot fat, the fried food is blown with hot air and then poured with cooking fat again. You can repeat this process several times. The fried food can also be blown with hot air after frying to remove fat residues.
- the steam formed in the initial phase during frying is suctioned off or removed in some other way.
- the rate at which the frying fat runs out of the frying basket is selected such that an initial floating effect is achieved when pouring over the frying fat before the frying fat can run off freely.
- the frying process can also be controlled automatically and the frying process is then ended, for example, by the pump being switched off and the frying fat running out completely from the frying basket and in the fried food contained therein.
- the fried food can then be stored, for example, in such a way that hot air is applied to the fried food so as to prevent cooling.
- the frying fat discharged by the fried food can also be automatically replaced by fresh frying fat.
- the desired effect of the uniform pouring over can be achieved even better.
- the measure of installing a hot air blower that switches on after the fat has run out of the finished fried food, adhering fat residues are blown off the fried food and the quality of the fried food is considerably improved. Under certain circumstances, the food to be fried can be kept in a consumable state by means of this hot air blower for a considerably longer time.
- the frying basket should be designed in such a way that the fat does not flow off the bottom, but first accumulates in the basket up to a certain height and then flows off over the sides.
- This basket would be more suitable for temporarily cooking thicker pieces in hot fat, such as potato croquettes, meatballs, cutlets and cutlets, and extends the possible uses of the method according to the invention.
- the method according to the invention allows the amount of frying fat to be reduced in relation to the amount of the fried food by guiding the fat in a circulation process in such a way that the ratio 1: 1 to 3: 1 can be maintained. Since the amount of frying fat discharged with the fried food can be reduced to 5% in the method according to the invention, the entire frying fat is discharged after about 15 to 20 frying processes and is gradually replaced by new frying fat. Solid contaminants are removed from the frying fat by appropriate filter devices, whereby the shelf life of the fat increases enormously. If desired, the fat can additionally be cleaned over diatomaceous earth, whereby dissolved and coloring impurities are also removed. Here, diatomaceous earth is placed in the frying basket instead of fried food. These kieselguhr filters are easy to replace and further extend the life of the frying fat, which is also extended by avoiding local overheating.
- the method according to the invention also requires a considerably lower heating energy than in previous immersion deep fryers, since only a small amount of frying fat always has to be circulated. Since the desired crust formation takes place more quickly and efficiently in the method according to the invention, it is possible to manage with shorter cooking times overall. It is also possible to work at temperatures lower than 175 to 180 ° C. Other fats or oils that are too temperature sensitive to be heated to 180 ° C can also be used. This also results in the possibility of using fats for deep-frying which are considered to be more valuable from a nutritional point of view than the generally fully hardened or semi-hardened frying fats.
- the deep-frying method according to the invention is therefore considerably superior to all prior-art deep-frying methods, enables faster preparation and leads to products which are tastier and less fat.
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Frying-Pans Or Fryers (AREA)
- General Preparation And Processing Of Foods (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96928444A EP0843518A1 (en) | 1995-08-11 | 1996-08-09 | Method of frying using little fat |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19529555A DE19529555A1 (en) | 1995-08-11 | 1995-08-11 | Method and device for frying in portions in little fat |
DE19529555.2 | 1995-08-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997006698A1 true WO1997006698A1 (en) | 1997-02-27 |
Family
ID=7769251
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1996/003537 WO1997006698A1 (en) | 1995-08-11 | 1996-08-09 | Method of frying using little fat |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0843518A1 (en) |
DE (1) | DE19529555A1 (en) |
WO (1) | WO1997006698A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102004013934A1 (en) * | 2004-03-22 | 2005-10-13 | Josef M. Kurz | Filtering plant, for purifying oils or fats used in food and also frying oil, comprises a pumping unit, a prefiltering unit and a filtering unit, where the pumping unit is connected before or after the filtering unit |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064796A (en) * | 1976-08-02 | 1977-12-27 | Jones John R | Cooking apparatus |
US4269861A (en) * | 1979-02-21 | 1981-05-26 | Heat And Control, Inc. | Process for preparing french fried potatoes and apparatus |
WO1983003043A1 (en) * | 1982-03-08 | 1983-09-15 | Swartley, John, S. | Method and apparatus for convection heating food |
WO1987006445A1 (en) * | 1986-04-23 | 1987-11-05 | Peter Martin Vos | Cooking apparatus |
US4756916A (en) * | 1987-09-30 | 1988-07-12 | Frito-Lay, Inc. | Process for producing low oil potato chips |
EP0357168A2 (en) * | 1988-09-02 | 1990-03-07 | John T. Buckley | Method and apparatus for improved preparation of fried foods |
WO1993012703A1 (en) * | 1991-12-20 | 1993-07-08 | Vos Industries Pty. Ltd. | Cooking apparatus |
-
1995
- 1995-08-11 DE DE19529555A patent/DE19529555A1/en not_active Withdrawn
-
1996
- 1996-08-09 WO PCT/EP1996/003537 patent/WO1997006698A1/en not_active Application Discontinuation
- 1996-08-09 EP EP96928444A patent/EP0843518A1/en not_active Withdrawn
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4064796A (en) * | 1976-08-02 | 1977-12-27 | Jones John R | Cooking apparatus |
US4269861A (en) * | 1979-02-21 | 1981-05-26 | Heat And Control, Inc. | Process for preparing french fried potatoes and apparatus |
WO1983003043A1 (en) * | 1982-03-08 | 1983-09-15 | Swartley, John, S. | Method and apparatus for convection heating food |
WO1987006445A1 (en) * | 1986-04-23 | 1987-11-05 | Peter Martin Vos | Cooking apparatus |
US4756916A (en) * | 1987-09-30 | 1988-07-12 | Frito-Lay, Inc. | Process for producing low oil potato chips |
EP0357168A2 (en) * | 1988-09-02 | 1990-03-07 | John T. Buckley | Method and apparatus for improved preparation of fried foods |
WO1993012703A1 (en) * | 1991-12-20 | 1993-07-08 | Vos Industries Pty. Ltd. | Cooking apparatus |
Also Published As
Publication number | Publication date |
---|---|
EP0843518A1 (en) | 1998-05-27 |
DE19529555A1 (en) | 1997-02-13 |
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