• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE534389C2
    申请号:SE1000429
    申请日:2010-04-28
    公开日:2011-08-02
    发明作者:Joel Haamer
    申请人:Haamer Fou Ab；
    IPC主号:
    专利说明:

    Description of the invention.
    The invention relates to a process for sterilizing packaged foods in which a reduction valve according to the prior art for pasteurization is used. In order to achieve sterilization temperatures (124 degrees) faster than with conventional steam sterilization, microwaves are used in a pressure vessel, whereby the heating takes place according to a procedure which differs from conventional sterilization processes with steam and microwaves, both for heating and cooling. autoclaving normally, with closed packages, but the microwaves are allowed to heat the food in the packages so that an internal pressure is created in the package, whereby the valve opens and releases annuals in the autoclave. This steam creates a pressure in the autoclave so that sterilization temperature can be reached.
    In this process, the food is boiled in the package, whereby a preparation and a faster heat equalization takes place than when the food is not allowed to boil as in normal sterilization.
    The heating process is regulated by the supplied microwave energy being controlled by the pressure in the autoclave, which in turn is generated by the steam from the product in the package.
    The procedure according to the entry differs from both autoclaving with annuals and with microwave waves, where in both cases the autoclave is pressurized from the outside to raise the boiling point, so that sterilization temperature can be achieved inside the package without the contents boiling. Boiling would mean that the packages without a reduction valve break.
    An additional advantage of having a valve on the package that opens, is that you can ventilate unwanted gases from the food, such as lu fi, and oxygen dissolved in the product water. This possibility simplifies the pre-process with the raw materials, so that in many cases completely fresh raw materials can be used. Getting the oxygen out of the package completely is a great advantage as the oxidation process inside a whole can can mean that, even if you do not have a bacterial effect, certain products are destroyed by they (oxidize) hairs gradually, with only a little oxygen present, and become insoluble as human food During normal autoclaving with steam, the new oxygen-barrier (EVOH) plastic foils cannot be used to make oxygen-tight packaging or because the EVOH layers are destroyed by the prolonged heat treatment, with only thematic heat conduction in the packages. During heat treatment according to the invention, the food in the package is quickly brought to boiling with microwave energy, whereby the steam is released through the valve, at the same time as there is a mixing in the package during cooking, which also accelerates the heat conduction in the food, further shortening the process time. The short process time (about four times faster than in autoclaving with steam) means that the new barrier plastics can be used and you do not need to put aluminum layers in the package to get oxygen barriers, which is the case now with soft packages that are steam sterilized.
    When the sterilization process is completed in the autoclave, it is not necessary to cool the products, before opening the autoclave, in the process according to the invention.
    The valve regulates the pressure in the packages so that they do not burst when the packages boil during the pressure reduction when the packages are taken out of the autoclave and the valve 534 389 3 also closes automatically at a slight overpressure when the package has cooled down or the heating has stopped. separate cooling system. This procedure saves time and energy as there is no need to cool the packages before opening the autoclave, and the hot autoclave can only be used for heating and not for both heating and cooling. In normal autoclaving with both steam and microwaves, energy is thus also needed to cool the autoclave itself, something that is not done in the process according to the invention.
    权利要求:
    Claims (9)
    [1]
    1 534 389 Patent claims. Procedure for cooking and sterilizing (heating to 124 degrees) with microwaves of dry-packed food, characterized in that the food is packed in a package transparent to microwaves, which is provided with a one-way valve which opens at a predetermined overpressure in the package and closes at a predetermined lower overpressure in a microwave heating process an autoclave where the pressure is generated by steam from the food
    [2]
    Process according to claim 1, wherein fresh raw materials are packaged and processed.
    [3]
    A method according to claim 1, wherein unwanted gases in packaged food are vented out of the food and the package with a one-way valve during cooking and sterilization.
    [4]
    A method according to claim 1, wherein the pressure in the autoclave comes from steam formed inside the packages when these were won with micro-waves, the valve on the packages opening and releasing this pressure inside the autoclave so that it builds up the required overpressure to reach 124 degrees.
    [5]
    A method according to claim 1, wherein the heating process is controlled automatically by pressure and temperature sensors inside the autoclave which in turn regulate the supply of microwave energy.
    [6]
    A method according to claim 1, wherein the product is boiled in the package before the sterilization temperature is reached, which gives a faster and more even heating of the food in the package ironed with sterilization where the boiling point is raised by means of external pressure, whereby boiling does not occur in the package during the sterilization process.
    [7]
    A method according to claim 1, wherein the product is also boiled in the package with a mixing as a result, at the end of heating when the pressure in the autoclave is reduced through a reduction valve, without the packages and the autoclave being cooled before the autoclave is opened.
    [8]
    A method according to claim 1, wherein all the air is expelled from the package via the one-way valve with the aid of water vapor during boiling, so that vacuum is created in the package upon cooling.
    [9]
    A method according to claim 1, wherein the single-wave valve on the package consists of an opening on the top of the package over which opening a layer comprising an adhesive is arranged which opens the opening at a certain overpressure and which closes the opening or completed sterilization process at a certain low overpressure due to of a certain elasticity in the adhesive layer covering the hole. The glued one-way valve thus prevents bacteria from entering the package in the final phase of sterilization processing.
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    同族专利:
    公开号 | 公开日
    SE1000429A1|2011-08-02|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    SE538970C2|2015-02-12|2017-03-07|Micvac Ab|Method and means for cooking and sterilization|
    法律状态:
    2014-12-02| NUG| Patent has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1000429A|SE1000429A1|2010-04-28|2010-04-28|micro Preservation|SE1000429A| SE1000429A1|2010-04-28|2010-04-28|micro Preservation|
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