GB2326954A - System for heating refreshments with a code representing heating levels and times - Google Patents

System for heating refreshments with a code representing heating levels and times Download PDF

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Publication number
GB2326954A
GB2326954A GB9713902A GB9713902A GB2326954A GB 2326954 A GB2326954 A GB 2326954A GB 9713902 A GB9713902 A GB 9713902A GB 9713902 A GB9713902 A GB 9713902A GB 2326954 A GB2326954 A GB 2326954A
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heating
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code
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GB9713902D0 (en )
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Jamie Ridyard
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Jamie Ridyard
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    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B6/00Heating by electric, magnetic, or electromagnetic fields
    • H05B6/64Heating using microwaves
    • H05B6/6435Aspects relating to the user interface of the microwave heating apparatus
    • H05B6/6441Aspects relating to the user interface of the microwave heating apparatus allowing the input of coded operation instructions, e.g. bar code reader

Description

HEATING REFRESHMENTS This invention relates to apparatus for heating refreshments, and a method of marking refreshments with instructions for heating. In particular, but not exclusively, the invention relates to heating refreshments, such as food and drink, in microwave ovens and conventional ovens.

Known microwave ovens have means allowing the user to explicitly set a heating level and, separately, a heating time. For example, a microwave oven having a 650 W power rating may have four selectable heating levels, namely full power, defrost, medium and simmer. A heating time may be set by the user by entering a time by a keypad interface.

There are various drawbacks and inconveniences associated with the conventional setting procedures.

First, microwave ovens vary considerably in their heating characteristics, not least because various power ratings are available. Therefore, manufacturers of refreshments must either supply heating instructions with the refreshments which are either relatively detailed or inadequate to take account all the different types of microwave ovens available.

Secondly, users of microwave ovens often find the process of determining the correct heating instructions and setting the appropriate heating levels and heating times too complex and therefore inconvenient. This is particularly true when the heating procedure involves any number of steps. For example, a frozen product may First require 10 minutes at defrost level, followed by five minutes at full power. The user would need to set each heating time level combination separately at different points in the heating procedure.

Similar drawbacks apply to known methods of setting the heating settings for conventional ovens.

It would be beneficial to increase the convenience of setting heating sessions for users of conventional and microwave ovens.

In accordance with one aspect of the present invention there is provided apparatus for heating refreshments, said apparatus comprising means for heating refreshments according to a said heating level and a set heating time, first setting means for allowing a user to explicitly set said heating levels and to explicitly set said heating time, and second setting means for avoiding the need to perform at least one of said explicit settings, said second setting means comprising means for allowing a user to enter a code representing a preset heating level and/or a preset heating time, and means for converting said code into said preset heating level andlor said preset heating time.

Thus, although the heating apparatus will have the first setting means for performing explicit settings, the second setting means are provided to allow the setting of the heating procedure by means of a simple code which may represent the preset heating level and/or the preset heating time.

The code could be provided by the manufacturers of the project to be heated, to be used when the heating settings are set. The code would preferably be recognised by a variety of heating appliances which operate in accordance with the present invention, such that all users would need to refer only to a single recommended code when setting their respective apparatus.

In accordance with a further aspect of the invention, there is provided a method of marking refreshments with instructions for heating, said method comprising marking said refreshments with a recommended heating level and a recommended heating time, characterised in that said methods further comprises converting a preset heating level and/or a preset heating time into a code from which set preset heating level and/or said preset heating time may be derived, and marketing set refreshments with said code.

Thus, in addition to marketing their products with heating times and heating levels for users of other types of heating appliances, manufacturers of refreshments may mark their products with the code of the present invention for use by owners of heating appliances enabled with the functionally of the present invention.

Embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein: Fig. 1 shows a marking which is applied to the packaging of an item of refreshments in accordance with one embodiment of the invention; Fig. 2 shows a block diagram schematically illustrating a heating appliance according with an embodiment of the invention; and Fig. 3 shows a flow diagram illustrating alternative setting procedures in accordance with an embodiment of the invention.

This embodiment of the invention provides a way to encode the cooking requirements of a food in a short number.

Producers of both branded and supermarkets 'own brands' will add to the markings on the packaging of each product a short heating code in the form of a number, accompanied by an easily recognisable symbol, as illustrated in Fig. 1.

The number will efficiently encode the number of stages required to cook the product, and the power and duration of each stage.

Microwave oven manufacturers will add appropriate functionality to their products which will allow them to convert the heating code into the relevant cooking instructions.

Referring to figure 2, a microwave oven in accordance with the present invention includes a user interface in the form of a keypad 2 with an associated LCD display (not shown), a control unit in the form of a microprocessor 4, a settings memory 6, and heating components 8 including a power source, a microwave generator, waveguides, etc.

The keypad 2 includes a numerical keypad, a heating code entry button and a timer/alarm button.

Figure 3 illustrates the operation of the control unit 4 under two alternative setting modes, a conventional setting mode, and a code setting mode.

In the conventional setting mode, the user enters the heating level and the heating time via keypad 2, which the control unit 4 stores in memory 6 in steps 10 and 12. The control unit 4 then proceeds to conduct the set heating procedure by controlling the heating components in accordance with the stored level and time, step 14.

In the code setting mode, the user enters the heating code via keypad 2, which the control unit 4 stores in memory 6 in Step 16. The control unit converts the stored code, using a pre-programmed conversion algorithm, into respective heating time(s) and heating level(s) in Step 18, which are stored in memory 6 in Step 20. The control unit 4 then proceeds to conduct the set heating procedure by controlling the heating components in accordance with the stored level(s) and time(s), step 22.

The procedure for the user is this: locate the heating code on the product; press the heating code entry button on the microwave keypad (which tells the device to expect a heating code and not regular data such as time or power); enter the heating code on the numeric keypad; optionally, press the heating code button again followed by a number, to indicate how many food items are being cooked; place the food product in the microwave; press the microwave 'start' button. At any point the user can press the timer/alarm button, to toggle its state.

The alarm/timer button provides a way to indicate that a stage has completed. If the alann/timer is set, then when a stage completes an alarm will sound and the microwave will pause until the start button is pressed again. This gives the user the ability to stir or turn over the food product, or carry out whatever operation seems appropriate. The heating code entry and timer/alarm buttons both include a means for indicating their status, such as a light, or logo appearing on the LCD display.

If the alarm/timer button is not set, the stages will all complete in succession without any user intervention. Different foods will require different settings. See examples below.

There is also provision for cooking multiple items. If the product is a unit, such as a burger or a cup of coffee, to cook or heat more than one simultaneously, the user adds a 'multiplier' after entering the heating code. Typically the user just presses the heating code entry button, enters the number, then presses 'start' - however for multiple items they press the heating code entry button again after entering the heating code, then enter the number of items, before finally pressing the 'start' button.

An alternative data entry system is to add a barcode version of the heating code, which is to be read by barcode readers included in microwave and conventional ovens in accordance with an alternative embodiment of the invention.

Coding Scheme The basic coding scheme is summarised in table 1. It relies on selecting a small number of possible options for each type of information (stages, power, duration) each of which is binary efficient. The number which represents each type of information is stacked from right to left with no separators, and no unused numbers.

The number scheme used to encode the data is optimised at each stage to reduce the size of the final decimal number. In this instance optimisation means ordering the options such that the most common options have the lowest numerical coding, i.e. the topmost bits are left unset.

Although not required, checksuns, checkdigits or parity bits, may be added to prevent errors being made in the food cooking. For example, someone entering '3011' by accident instead of '301' would otherwise cause the food to be cooked incorrectly. So the scheme makes provision the later addition of for checksums or parity bits which can be included before its final delivery.

Encoding Duration This scheme encodes the duration via 2 pieces of information - the time base and the number of time units. This relies on the fact that as the duration becomes longer, the temporal resolution becomes lower. At a cooking duration of lh 30m, the accuracy no longer needs to be to the nearest lows.

An important insight is that the timebases are more than 2x apart to make them efficient.

Given that the information is encoded in binary, if the timebases were for example 1 m and 2m, the extra bits needed to encode the timebase information would exactly equal the amount of duration information lost by including the timebases, making it no more efficient than not including timebases.

The timebases are currently set at lOs, 30s, 3m and 1 Sm. These have been selected by compromising on resolution and length -- being short enough for high resolution, and long enough to offer lengthy cooking periods in a limited amount of information. These levels may be altered up or down slightly if it is considered appropriate after further research. These bases can be encoded by 2 binary bits of information. These numbers are optimised by having the most common timebase being set at 00, the next most common at 01 etc.

There are 16 levels of time unit. This means that there can be between 1 to 16 times the current time base to make up the duration. This can be coded by 4 binary bits of information. It is not attractive to optimise these numbers because they are not used to classify categories but are actually storing numerical values.

The duration is finally created by having the timebase ranges added to each other. So if the timebase is set to be 2 time units at 30s timebase, this does not mean a duration of Im, but im added to the range available from the total previous (smaller) timebases. In this case, the lOs timebase allows for durations of lOs - 2m40s to be encoded, so the 30s timebase range starts at the next available 30s unit which is at 3m, making 2 units at 30s timebase being decoded as 4m. This serves to avoid redundancy where timebase ranges would otherwise overlap, and extend the possible cooking durations with the same amount of information.

Unlike other coding systems, there are no library numbers. All numbers can be generated by the scheme algorithm, as far down as O -- the algorithm function is 'dense' for integers.

Encoding Power There are 4 power levels - full, simmer, medium, and defrost. These are arbitrarily based on a 640W microwave oven as a standard reference power, such that the same code is compatible with differently rated ovens.

The power levels are stored in 2 binary bits. The power numbers are optimised by having the most common settings having the smallest numbers. So 'full power' is encoded by 00 in binary, with 'defrost' at 01, etc.

The microwave control unit 4 uses a non-linear power/time conversion algorithm for calculating the time equivalent for the power of its particular microwave. So for a 1000W microwave, if the power number says 'full power' and the duration indicates 1 Om, then the time needed will be of the order of 640/1000 x 1 Om.

Encoding Stages Multiple stages are added by concatenating the individual timebase/time unit/power numbers.

If 4m at full power is encoded by decimal '8', or binary '00001000', 2 stages of 4m full power would simply be binary '00001000 00001000' which is '2056' decimal.

This means there is no wasted information in introducing multiple stages, encouraging food producers to use multiple stages without worrying about making the numbers unwieldy. Instead of setting the time for cooking a tin of baked beans to 6m full power, the producer could set it to 2 stages of 3m, with the microwave sounding an alarm when the beans need stirring.

Setting Multiple Items If the heating code entry button is pressed again after the heating code has been entered, it tells the microwave to accept the number of items to be cooked.

The control unit 4 uses a non-linear power/time conversion algorithm between number of items and unit cooking times - it is not sufficient to cook 10 items exactly lOx the time of a single item.

Like 'multiple stages', allowing for multiple items does not extend the heating code.

Table 1 <img class="EMIRef" id="026530978-00060001" />

<tb> Description <SEP> Value <SEP> Range <SEP> I <SEP> Bits <SEP> Comments <tb> Timebase <SEP> 14 <SEP> 2 <SEP> 1= <SEP> 30 <SEP> secs, <SEP> 2 <SEP> = <SEP> 10 <SEP> secs, <SEP> 3 <SEP> = <SEP> 3 <SEP> mins, <SEP> 4 <SEP> = <SEP> 15 <SEP> mins <tb> Time <SEP> units <SEP> 1-16 <SEP> 10 <SEP> s <SEP> - <SEP> 2 <SEP> m <SEP> 40s <SEP> &commat; <SEP> 10s <SEP> intervais <SEP> <tb> <SEP> 30 <SEP> s <SEP> to <SEP> 8 <SEP> m <SEP> + <SEP> previous <SEP> range <SEP> = <tb> <SEP> 3mto11 <SEP> m&commat;30sintervals <tb> <SEP> 3 <SEP> mins <SEP> to <SEP> 48 <SEP> mins <SEP> + <SEP> previous <SEP> range <SEP> = <tb> <SEP> 12 <SEP> m <SEP> to <SEP> 57m <SEP> &commat; <SEP> 3m <SEP> intervals <tb> <SEP> 15 <SEP> mins <SEP> to <SEP> 4 <SEP> hours <SEP> + <SEP> previous <SEP> range <SEP> = <tb> <SEP> lh <SEP> to <SEP> 4h <SEP> 45 <SEP> m <SEP> intervals <tb> Power <SEP> 1-4 <SEP> 2 <SEP> level <SEP> 14, <SEP> time <SEP> scaled <SEP> by <SEP> mw <SEP> power <SEP> based <SEP> at <tb> <SEP> 640w. <SEP> Ordered <SEP> by <SEP> frequency, <tb> <SEP> 1 <SEP> = <SEP> full <SEP> power <SEP> (1), <SEP> 2 <SEP> = <SEP> defrost <SEP> (.25), <SEP> 3 <SEP> = <SEP> medium <tb> <SEP> (.75), <SEP> 4 <SEP> = <SEP> simmer <SEP> (.5) <tb> Multiple <SEP> Stages <SEP> concatenate <SEP> binary <SEP> numbers <tb> Possible <SEP> checkbits <SEP> I <SEP> A <SEP> 2 <SEP> set <SEP> the <SEP> checkbits <SEP> such <SEP> that <SEP> the <SEP> final <SEP> number, <SEP> or <tb> <SEP> multiples <SEP> of <SEP> previous <SEP> bits <SEP> plus <SEP> the <SEP> checkbit <SEP> are <tb> <SEP> divisible <SEP> by <SEP> 4. <tb>

TOTAL <SEP> 8 <SEP> per <SEP> smallest <SEP> number <SEP> 0, <SEP> largest <SEP> single <SEP> section <SEP> 255. <tb>

<SEP> stage <SEP> 2 <SEP> section <SEP> numbers <SEP> from <SEP> 256 <SEP> to <SEP> 65535 <tb> <SEP> 3 <SEP> section <SEP> numbers <SEP> from <SEP> 4539717 <SEP> to <SEP> 16777215 <tb> <SEP> Therefore <SEP> no <SEP> library <SEP> sections. <SEP> This <SEP> assumes <SEP> no <tb> <SEP> inclusion <SEP> of <SEP> checkbits. <tb>

Examples of Heating Codes Decimal, O (Binary, 00000000) = 3m at full 1(00000001) lOs at full 2 (00000010) = 12m at full 3 (00000011) lhr at full 4 (00000100) = 3m30s at full 8 (00001000) = 4m at full 100 (01100100) = 7m30s at defrost 36 (00100100) = 7m30s at full 200 (11001000) = 4m at simmer 1104 (00000100 01010000) = 5m defrost, 3m30s full power 34952 = 10001000 10001000 = 4m medium, 4m medium 2056 = 00001000 00001000 = 4m full, 4m full It will be appreciated that a similar coding scheme and functionality may be applied in the case of conventional ovens. It will also be appreciated that various modifications and variations may be applied without departing from the scope or spirit of the present invention.

Claims (16)

CLAIMS:
1. Apparatus for heating refreshments, said apparatus comprising means for heating refreshments according to a set heating level and a set heating time, first setting means for allowing a user to explicitly set said heating level and to explicitly set said heating time, and second setting means for avoiding the need to perform at least one of said explicit settings, said second setting means comprising means for allowing a user to enter a code representing a preset heating level and/or a preset heating time, and means for converting said code into said preset heating level and/or said preset heating time.
2. A method of marking refreshments with instructions for heating, said method comprising marking said refreshments with a recommended heating level and a recommended heating time, characterised in that said method further comprises converting a preset heating level and/or a preset heating time into a code from which said preset heating level and/or said preset heating time may be derived, and marking said refreshments with said code.
3. Apparatus or a method according to claim 1 or 2, wherein both said preset heating level and said preset heating time are derivable from said code.
4. Apparatus or a method according to claim 1, 2 or 3, wherein said code is a datacompacted version of a preset heating level and/or a preset heating time.
5. The apparatus or a method according to claim 4, wherein said code comprises the portion representing the time base and a portion representing the number of units of said Time Base in a preset heating time.
6. Apparatus or a method according to any proceeding claim, wherein said code comprises a portion presenting a preset heating level.
7 Apparatus or a method according claim 5 or 6, wherein said portions are separate when said code is expressed in digits of a predetermined base.
8. Apparatus or a method according to claim 7, wherein said predetermined base is base 2.
9. Apparatus or a method according to any preceding claim, wherein said code represents a preset initial heating time and one or more preset subsequent heating times, and/or a preset initial heating level and /or one or more preset subsequent heating levels.
10. Apparatus or a method according to claim 9, wherein said code represents both said initial and subsequent levels and said initial and subsequent times.
11. Apparatus or a method according to any proceeding claim wherein said code consists of a single string of characters.
12 Apparatus or a method according to any proceeding claim, wherein said code is respectively input or marked in base 10 digits.
13. Apparatus or a method according to any of claims 1 to 12, wherein said code is respectively input or marked as a barcode.
14. Apparatus or a method according to any proceeding claim, wherein said code is independent of the type of heating apparatus used.
15 Apparatus according to any proceeding claim, further comprising means for allowing a user to enter a number of items to be heated along with said code, and means for converting said number and said code to a preset heating time and/or a preset heating level.
16. A method according to any of claims 2 to 15, further comprising the step of entering said code into apparatus according to any preceding claim to initiate the heating of said refreshments.
GB9713902A 1997-07-02 1997-07-02 System for heating refreshments with a code representing heating levels and times Withdrawn GB2326954A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1417915A1 (en) * 2002-11-08 2004-05-12 Antonino Campo A device for heating foodstuff
WO2005004543A1 (en) * 2003-07-07 2005-01-13 Real Food Sweden Ab Device for achieving a temperture controlled heating of mainly solid food in a microwave oven
EP1501336A1 (en) * 2003-07-22 2005-01-26 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
EP1622425A1 (en) * 2003-07-22 2006-02-01 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
EP1633168A1 (en) * 2004-09-03 2006-03-08 Sampo Corporation Microwave device
FR2990596A1 (en) * 2012-05-16 2013-11-22 Ching-Chuan Lin Cooking a food in microwave oven, comprises bringing food product packing opposite to cooking appliance to allow a reader to carry out a reading of code, and allowing reader to convert contents of parameters in code into digital signals

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US4254824A (en) * 1979-02-21 1981-03-10 Anchor Hocking Corporation Food preparation apparatus
US4323773A (en) * 1980-01-17 1982-04-06 Litton Systems, Inc. Bar code controlled microwave oven
EP0550124A2 (en) * 1992-01-03 1993-07-07 Menumaster, Inc. Oven controlled by an optical code reader
US5426280A (en) * 1994-02-16 1995-06-20 Intellectual Property Development Associates Of Connecticut, Inc. Cooking device having a sensor responsive to an indicia for executing a cooking program
US5573691A (en) * 1994-06-01 1996-11-12 Funai Electric Co., Ltd. Computerized cooking device

Patent Citations (5)

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Publication number Priority date Publication date Assignee Title
US4254824A (en) * 1979-02-21 1981-03-10 Anchor Hocking Corporation Food preparation apparatus
US4323773A (en) * 1980-01-17 1982-04-06 Litton Systems, Inc. Bar code controlled microwave oven
EP0550124A2 (en) * 1992-01-03 1993-07-07 Menumaster, Inc. Oven controlled by an optical code reader
US5426280A (en) * 1994-02-16 1995-06-20 Intellectual Property Development Associates Of Connecticut, Inc. Cooking device having a sensor responsive to an indicia for executing a cooking program
US5573691A (en) * 1994-06-01 1996-11-12 Funai Electric Co., Ltd. Computerized cooking device

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1417915A1 (en) * 2002-11-08 2004-05-12 Antonino Campo A device for heating foodstuff
WO2005004543A1 (en) * 2003-07-07 2005-01-13 Real Food Sweden Ab Device for achieving a temperture controlled heating of mainly solid food in a microwave oven
US7196298B2 (en) 2003-07-07 2007-03-27 Real Food Sweden Ab Device for achieving a temperature controlled heating of solid food by indicating a temperature change of the solid food caused by microwave heating
EP1501336A1 (en) * 2003-07-22 2005-01-26 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
EP1622425A1 (en) * 2003-07-22 2006-02-01 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
EP1765037A1 (en) * 2003-07-22 2007-03-21 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
CN1324264C (en) * 2003-07-22 2007-07-04 三星电子株式会社 Cooking apparatus using barcode
US7473869B2 (en) 2003-07-22 2009-01-06 Samsung Electronics Co., Ltd. Cooking apparatus using barcode
EP1633168A1 (en) * 2004-09-03 2006-03-08 Sampo Corporation Microwave device
FR2990596A1 (en) * 2012-05-16 2013-11-22 Ching-Chuan Lin Cooking a food in microwave oven, comprises bringing food product packing opposite to cooking appliance to allow a reader to carry out a reading of code, and allowing reader to convert contents of parameters in code into digital signals

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