Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J36/00—Parts, details or accessories of cooking-vessels
  • A47J36/38—Parts, details or accessories of cooking-vessels for withdrawing or condensing cooking vapors from cooking utensils
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J37/00—Baking; Roasting; Grilling; Frying
  • A47J37/12—Deep fat fryers, e.g. for frying fish or chips
  • A47J37/1204—Deep fat fryers, e.g. for frying fish or chips for domestic use
  • A47J37/1209—Deep fat fryers, e.g. for frying fish or chips for domestic use electrically heated

Definitions

• the present invention relates to an electric fryer, and more particularly to the particular development of the filter cover and of the viewing window equipped with a cleaning system, guaranteeing optimum viewing of the objects located inside the cooking chamber.
• the present invention provides a fryer which does not have the aforementioned drawbacks by the fact that the cover comprises, from bottom to top, a screen or reflector, a lower condensation wall, an upper condensation wall, a condensation enclosure between the walls. of upper and lower condensation, a means of communication between the cooking chamber and the condensation chamber, filtration means carried by the upper condensation wall, a means of communication between the condensation chamber and the outside at through these filtration means as well as a means of evacuation towards the outside of the condensation water.
• Some fryers currently available on the market are equipped with a translucent window, fixed on the wall of the cover, and intended to view the food inside the cooking chamber, without opening the cover.
• the cover of the fryer according to the invention is provided with a porthole mounted for rotation in the cover and provided with a scraper.
• the porthole comprises an upper shell and a lower shell housed so as to be able to rotate in a sealed manner in a chamber, the lower part of the porthole passing through not only the lower condensation wall but also the reflector so that the lower surface of the shell is placed in the cooking chamber, a support integral with the cover being provided at the lower part of the assembly described above, this support comprising a scraper the upper part of which is in permanent contact with the lower surface of the shell .
• FIGS. 1 and 2 are perspective views of the fryer side control panel, respectively in the closed and open state;
• FIG. 3 is a top view with section partial of the fryer on the hinge side after removal of the decoration grid;
• - Figure 4 is a section of the same part with the additional decoration grid;
• - Figure 5 is a top view with partial section of the fryer on the control button side after removal of the upper condenser;
• FIG. 6 is a section of this same part with the upper condenser and the decoration grid in addition;
• FIG. 7 is a sectional view of the hinge and the condensate harvester
• - Figure 8 is a sectional view of the mechanism for raising and lowering the basket of firms and - Figure 9 is a horizontal sectional view of this mechanism;
• FIG. 10 is a plan view of the same mechanism for raising and lowering the basket of fries
• FIG. 14 is a plan view of the fryer control console as a whole
• - Figure 15 shows a detail of the hanging device of the basket of fries
• - Figures 16A, B and C illustrate a handle for gripping the french fries basket
• the filter cover is made up of one piece centerpiece 1 comprising the external shape of the filter cover, and, inter alia, handling handles 2.
• This centerpiece comprises a wall integral with the outer crown 3 of the cover and which is called here the “lower condenser” 4.
• the main part is made of thermoplastic material, loaded with glass fibers, resistant to temperature.
• An "upper condenser” 5 comes to rest on the internal annular shoulder 6 of the filter cover as well as on pins 7 integral with the lower condenser 4 and guaranteeing a constant distance between the internal surface of the upper condenser 5 and the upper surface of the lower condenser 4 (condensing enclosure 35).
• the cover 1 also includes a rubber seal 8 (in L) which is located around the entire inner periphery of the filter cover and ensuring the seal between the cover itself and the aluminum cooking vessel 9.
• This rubber seal has a "L" profile allowing it to be held in its position by a shiny aluminum reflector 10, fixed to the internal wall 4 of the cover 1.
• An activated carbon filter 11, associated with an anti-grease filter 12 located upstream of the filter made of activated carbon, is placed on the upper condenser 5 and is kept away from it by a series of ribs100 allowing the vapors coming from the condensation enclosure 35 to be distributed over the entire surface of the filter, in order to optimize the entire grease filter and activated carbon filter.
• This set of two filters covers half of the total surface of the upper condenser and is held in place by a decoration grid 13 removably attached.
• This removable filter cover is assembled to the body of the fryer by a metal piece 17 fixed in the recess of the handle on the hinge side of the cover 1.
• the connection of this metal hinge 17 with the handle 18 secured to the external tank 19 is made at by means of a removable metal pin 20, making it possible to use the fryer with or without a filter cover, and the system of which is also intended to facilitate the maintenance of the various parts of the fryer.
• a set of ten chimneys 21 situated at the opposite part to the activated carbon filter and forming a body with the lower condenser 4 is arranged on the periphery of the filter cover, ensuring communication between the cooking chamber and the condensation chamber.
• the reflector 10 During the rise in temperature of the oil bath until the temperature preset on the thermostat is obtained, the reflector 10, the lower condenser 4 as well as the upper condenser 5 heat up to their operating temperature .
• the stability of the condenser temperature is of course also ensured by the temperature of the lower condenser of the neighboring enclosure, which during the vertical position of the cover transfers the calories stored in the mass to the aluminum reflector.
• the control button 23 and the mechanism basket lowering the basket loaded with food is lowered into the oil bath.
• a very short period will pass, period necessary for the heating of the food, until their temperature is sufficient to cause the phenomenon of vaporization of the water contained in the food. This period, as short as it may be, will cause the reflector 10 to rise in temperature, causing this temperature to be higher than that corresponding to the water condensation level, under normal atmospheric pressure.
• the electronic thermostat control only selects oil bath temperatures above 100 °, the temperature of the air between the cover and the oil bath will be such that the temperature difference between the two sides of the reflector 10 prevents the condensation of water on the lower surface of the reflector 10.
• the temperature of the upper surface of this reflector is kept more or less constant by the superposition of the lower condenser 4 and the upper condenser 5, a temperature which is maintained throughout the cooking by the transmission of the calories brought by the vapors of the cooking bath, and circulating in the condensation enclosure 35 via the wall of the lower condenser 4.
• the water and oil vapors are entrained towards the condensation enclosure 35 through the chimneys 21, the internal diameters of which decrease, so that the surface of the condenser is used optimally.
• the upper condenser 5 its temperature is much lower than the condensation level, and it alone ensures approximately 80% of the formation of condensates, insofar as the lower surface of the condenser 5 will be quickly saturated with water during the first half of the cooking period.
• the temperature of these two condensers is such that the condensates remain inside the condenser. It is for example around 80 ° C for the lower condenser 4, around 50-60 ° C for the upper condenser 5.
• the low temperature of the condenser is also ensured by the position of the reflector 10 acting as a heat shield and which is brought to a temperature of about 110 ° C.
• the water thus condensed significantly reduces the water concentration of the vapors; the remaining vapors are discharged through the condenser 5 through a whole series of orifices 102 produced in the condenser 5 under the oil filter and the activated carbon filter. This makes it possible to extend the life of these two filters by reducing the oil and water concentrations, provided for water by the condenser, and for oil by the oil filter 12.
• a pipe 15 which fits into the cavity of the handle on the hinge side and ensures the evacuation of condensates when the filter cover is opened.
• This discharge orifice is located in the same plane as the upper surface of the lower condenser 4.
• the condensates are therefore removed only during the opening period of the cover, ensuring at this time, due to the inclination of the condenser surfaces, the natural flow of water to this discharge orifice.
• the water flows through a small funnel from the handle 18 to the recovery tank 16 fixed outside the fryer on the covering 19, below the handle 18.
• a flexible cellular rubber seal 36 is housed in a bowl of the handle. 18, just below the lower opening of the pipe 15.
• the filter cover 1 When the filter cover 1 is in a horizontal position, that is to say a closed fryer, the lower orifice of the pipe 15 sinks slightly into the seal 36, thus ensuring the tightness of the conduit during cooking.
• the sum of the passage sections for discharging the condenser vapors to the outside is greater than the sum of the passage sections of the chimneys 21 to avoid excessively high pressure in the enclosure.
• the system can be made even more efficient by increasing the surface area of the upper condenser 5: for example, in the shape of a sawtooth, without going beyond the ambit of the present invention.
• this fryer is equipped with a mechanism enabling the basket to move in translation from the loading position. (point top) to the cooking position (bottom point), using a control button located on the center console 22 of the appliance.
• This mechanism consists of a control button 23 located outside the fryer, driving during its movement, a connecting pin 24.
• This control pin is in mechanical connection with a bar 25 whose passage through the heating tank is made by a guide sleeve 26, crimped on the heating tank.
• the seal between the axis 24 and the guide sleeve 26 is ensured by an O-ring 27 made of silicone rubber received in a groove 104.
• the bar 25 is equipped at its end with an axis 28, circulating in a cut out buttonhole 29 in the mobile slide 30.
• the movement of this slide 30 is ensured by a guide 31 mechanically assembled to the tank 9.
• the mobile slide 30 has at its upper part a tab 103 with central buttonhole or notch intended to receive the hook 32 welded on basket 33.
• the total translational movement necessary for the basket 33 which is high exposure (waiting position for loading or unloading ment), descends, to the low position (cooking position), determines the maximum stroke of the basket, corresponding to the distance between the main axis 24 and the drive axis 28. This maximum stroke is the result of the multiplication by two of the distance between centers of part 24 and part 28.
• the descent of the basket, in connection with the up and down movement of the movable slide, is slowed down by the high coefficient of friction between the shoulder 105 for retaining the button 23 and the inner part 106 of the crown of the through hole in the handle 22.
• This coefficient of friction is obtained by. a spring 34 disposed in the extension of the axis 24 and housed in the control button 23 and by the clearance which remains between the button 23 and the axis 24.
• the filter cover is equipped with a cylindrical porthole 37, made of transparent material resistant to temperature, either in pyrex, or in thermoplastic material type polyamide 12, resistant to temperature and oils.
• This porthole is made up of two shells: an upper shell 38 and a lower shell 39.
• This set also includes a cellular rubber ring seal area 40 and an anti-friction washer 41, placed under the junction shoulder of the lower window.
• the assembly is housed in a chamber 42 produced by two circular rings integral with the condenser 5 in its upper part and with the condenser 4 in its lower part, ensuring sealing against the vapors circulating in the condensation enclosure.
• the seal 40, the washer 41 and the window 37 are deposited in this order in the chamber 42, and are held in place only by. the assembly of the condenser 5 in the cover 1.
• the lower part of the porthole 37 passes through not only the lower condenser 4 but also the reflector 10 so that the lower surface of the shell 39 is placed in the cooking chamber.
• the upper part of the scraper 44 is in permanent contact with the lower surface of the shell 39.
• the system described by the present invention has been designed so that the thermal bond between the upper shell 38 and the lower shell 39 is weak, such that moto that the lower shell 39, the temperature of which will rise very quickly by its contact with the vapors coming from the bath, has a mass temperature higher than that of the upper shell 38, which it is in contact with the temperature ambient air.
• the temperature difference will be as high as possible between the two shells; this difference is necessary for two reasons: firstly, so that the temperature of the upper shell 38 is sufficiently low in order to allow safe handling by contact of the hand with the upper window; then the temperature of the lower shell should be higher than 100 ° C if possible to avoid natural condensation of the water.
• the scraper 44 coming into contact with the lower surface of the shell 39 serves to eliminate the condensation which nevertheless forms.
• the user can, by manual action, give the porthole 37 a rotational movement both to the left and to the right, a rotational movement which is facilitated by the assembly described above of the porthole 37 in room 42.
• This fryer is also equipped with a removable handle 45 made of steel wire spring with two branches 45a, 45b, allowing after coupling with the basket, to handle it in the safest conditions for unloading food after cooking ( Figures 16A, B and C).
• the principle achieved has the advantage of making up for any possible play that may arise, solely by virtue of the shape of the folds and the spring nature of the wire handle. This guarantees, when the user overturns the basket to empty the food, maximum stability of the handle / basket coupling.
• This fryer is also equipped with a storage system for the power cable 48 ( Figure 17)
• This electronic thermostat consists of an integrated circuit, of the TDA 2090 type from Plessey Semiconductors according to the principle of balancing a resistive bridge consisting on the one hand by a thermistor Th housed against the external wall of the heating tank, and d on the other hand by a reference resistor R chosen from a bridge of five resistors, choice made by the user by means of a switch. buttons, the five buttons 110-114 of which appear on the control panel 115 of the central console 116 of the fryer.
• This integrated circuit controls, via the trigger of a triacTR, the power circuit ensuring the supply or not of the heating element and therefore the temperature stability of the oil bath.
• the other components namely: the switch, the integrated circuit - the power circuit for electronic components, the adjustable potentiometer, etc. - are fixed on a printed circuit housed in the main console box, just behind the cover showing the temperature indications.
• the switch consists of five keys, ensuring the following functions: 1 ° / STOP: stopping the device 2 ° / 160 ° C 3 ° / 170 ° C 4 ° / 180 ° C 5 ° / 190 ° C
• the first indicates that the appliance is switched on - the second lights up when the preset oil temperature is reached - the third LED indicates that the oil bath temperature is higher than the preset temperature, signaling of this does an abnormal function of the device.
• the device according to the invention can also be fitted with a traditional electromechanical thermostat which in no way constitutes an obstacle to this patent.

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• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Frying-Pans Or Fryers (AREA)

Applications Claiming Priority (2)

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ID=3843611

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• 1984
  • 1984-03-02 WO PCT/BE1984/000005 patent/WO1984003427A1/fr not_active Application Discontinuation
  • 1984-03-02 EP EP84900845A patent/EP0137809A1/de not_active Withdrawn
  • 1984-03-02 US US06/674,955 patent/US4636618A/en not_active Expired - Fee Related

Non-Patent Citations (1)

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