CA1051210A

CA1051210A - Deep fryer

Info

Publication number: CA1051210A
Application number: CA249,287A
Authority: CA
Inventors: Ernst E.F. Eklund
Original assignee: Concordia Development AB
Current assignee: Concordia Development AB
Priority date: 1975-04-07
Filing date: 1976-03-31
Publication date: 1979-03-27
Also published as: FI760866A; FR2306663B1; AU1277776A; CH607685A5; DE2612199A1; SE391275B; IT1059292B; DK147576A; NO761164L; JPS51128463A; GB1517471A; SE7503917L; AU499018B2; FR2306663A1; AT356833B; ATA233376A; BE840375A

Abstract

ABSTRACT

A deep fryer to be used for example in the production of french fried potatoes comprising an inner fixed container for accommodation of the products to be fried and an outer raisable and lowerable oil container which surrounds the inner container and communicates with it via openings in the inner container.

Description

The present invention relates to a deep fryer used for example in the production of french fried potatoes.
Known deep fryers consist of a basic oil container, into which a wire basket containing the products to be fried is lowered by hand. The drawbacks with such a deep fryer are, inter alia, that the quality of the finished product can be ; very uneven, partly because it either lies too long in the oil bath or is there for too short a time, and partly because s the oil deteriorates (oxidizes) comparatively quickly through open contact with the surrounding air. A further drawback is the oil fumes which are obtained in the place where the -~
fryer is used, due to the open oil bath.
The present invention has the object of removing the ~ .
above-mentioned drawbacks with known deep fryers and to provide a deep fryer which gives a much more even product by the cooking time being always the same and the oil being protected against oxidi~ation. The deep fryer according to the invention is therefore characterized by an inner fixed container which is intended to contain the products to be fried, and an outer raisable and lowerable oil container surrounding the inner container, and which communicates with it via openings in its 31~ lower portion.
According to a particularly preferred embodiment, the oil container is provided on its inside with a seal going all away around the periphery and extending substantially up to the outside of the inner container, the seal being situated above the surface of the oil bath, whereby evaporation or :'~

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lOSlZ10 fumes from the portion of the oil bath surface lying between both of the containers is substantially avoided. According to another preferred embodiment of the invention, the bottom of the inner container is substantially at the same level as the ..
surface of the oil bath in the oil container when the latter is in its lowered position, whereby indirect heating of the fried product is obtained by the heat which is given off from the surface of the oil bath. According to still further pre-ferred embodiments, the deep fryer comprises a shielding plate in the bottom portion of the oil container, whereby a cold zone is obtained for the oil in this part, so that it keeps , better and remains fresh a longer time due to the low temper-` ature, The inner container is furthermore suitably provided with a lid which closes automatically when the oil container is raised for frying to take place, and which likewise opens . ,.
automatically when the oil container is lowered for taking out the ready fried product.
In accordance with an aspect of the present invention, .. ...
; there is provided a deep fryer, comprising an inner fixed container which is intended to accommodate the products to be :~` fried, and an outer raisable and lowerable oil container in-` cluding an oil bath therein surrounding the inner container .:, ~' and communicating with it via openings in the inner containe~, the fryer further including a case, with an upper portion ~ projecting out from an upper portion of the inner container `' and a skirt portion thereof surrounding the oil container and . ~
further comprising a seal between the inside of the oil con-tainer and the article of the inner container located vertically ~. ~
~ above the surface of the oil placed in said oil bath.

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`,, ,~'~. -lOS~Z10 The invention is described in detail in the followingwhile referring to the attached drawing on which an embodiment oi^ the invention is schematically illustrated as an example.
The deep fryer shown on the drawing comprises an outer raisable and lowerable oil container 1 and an inner fixed container 2 containing the product to be fried. On the drawing, the deep fryer 1 is shown in its lowered position, whereat the oil level in it is shown by the designation 3. Inside the inner container 2 there is arranged a wire basked 4 for the article to be~~fried, e.g. potatoes for "French frying".

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lOSlZi0 Betewen the wire basked 4 and the container 2 there is an exchangeable filter paper 5 for collecting waste from the fried product so that this waste does not come into the oil bath and cause it to deteriorate. The container 2 is provided with a lid 6 which is opened and closed automatically when the container 1 is respectively lowered and raised. The lid 6 is provided with a connection 7 for exhausting fumes, and a collection channel (not shown) for condensed oil, communicat-ing with a collecting container. When the product in the container 2 is to be fried, the container 1 is raised sufficient-ly for the surface of the oil bath to reach up to the level designated 8. The oil in the container 1 thereby runs into the container 2 through holes 9 in the lower portion and !
bottom of the container 2. The bottom 10 of the container 2 is suitably at the same level as the surface ~ of the oil bath in the lowered position of the container 1, so that indirect heating of the ready-fried product is obtained by heat from the surface of the oil bath. The oil container 1 is surrounded by a case 11, having a horizontal portion projecting outwardly from the top of the inner container 2. On its inside, the container 1 is provided with a seal 12 going all the way round, which is situated above the surface of the oil bath and extends substantially up to the outside of the container 2.
The seal 12, together with a sealing rim 13 at the lower portion of the container 2 and submerged in the oil bath even at the lowest position of the container 1, prevents oil fumes from forcing their way up under the case 11 and air coming into ~ 3 -, iOS~Z10 contact with the oil bath. The container 1 is also provided with an oil heater 14 arranged at a level under the oil level in the container 1. In the lower portion of the container 1 there is an upwardly directed shielding cone 15 defining a cold zone in the bottom portion of the container 1. This cold zone alLows the oil to be preserved better, because the waste which comes from the fried product through the filter paper - 5 and sinks down to the bottom of the container 1, does not spoil the oil as quickly as would otherwise be the case, due to the low temperature within this bottom zone. The oil from th~ container 1 is tapped off together with the waste through a tap 16.
~' The c~ntainer 1 is raised and lowered automatically with the help of a timer control (not shown), whereby the product being fried is always submerged in the oil bath for exactly the same time, ensuring that a product of uniform quality is always obtained. The invention is not however limited to the special embodiment described hereinbefore, but embraces all the embodiments falling within the scope of the patent claims~

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Claims

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:-

1. A deep fryer, comprising an inner fixed container which is intended to accommodate the products to be fried, and an outer raisable and lowerable oil container including an oil bath therein surrounding the inner container and communicating with it via openings in the inner container, the fryer further including a case, with an upper portion project-ing out from an upper portion of the inner container and a skirt portion thereof surrounding the oil container and further comprising a seal between the inside of the oil con-tainer and the article of the inner container located vertic-ally above the surface of the oil placed in said oil bath.

2. A deep fryer as claimed in claim 1, wherein said seal goes all the way round the inside of the oil container and extends substantially forward to the outside of the inner container.

3. A deep fryer as claimed in claim 1, wherein the bottom of the inner container is substantially at the same level as that of the oil bath surface in the oil container in the lowered position of the latter.

4. A deep fryer as claimed in claim 1, comprising an oil heater arranged on the oil container at a level under its oil level.

5. A deep fryer as claimed in claim 1, comprising a generally upwardly directed screening plate defining a cold zone for the oil inside the bottom portion of the oil container.

6. A deep fryer as claimed in claim 1, wherein the inner container has a lid with an opening for connecting to fume exhaust.

7. A deep fryer as claimed in claim 6, wherein the lid has a collecting channel for condensed oil, leading to a collecting container.

8. A deep fryer as claimed in claim 6, wherein the lid is automatically opened when the oil container is lowered and is automatically closed when the oil container is raised.

9. A deep fryer as claimed in claim 1, wherein the oil container is controlled by a timer which controls automatic lowering of the container after a preset period of time.