Method for homogeneously heating products

A technology for uniform heating and product, applied in the fields of dielectric heating, food preservation, food science, etc., can solve the problem of uneven heating of products or tubes, etc.

Inactive Publication Date: 2008-07-02
FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
View PDF3 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Non-uniform heating of the cross-section of the product or pipe;

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Example: heater tube for liquid suspension

[0036] 100 kg of fruit preparation comprising strawberries, sugar and gelling agent are conveyed through the HF heater tubes. A quartz glass tube was used as a heater tube, on which an aluminum electrode to which an HF field was applied was mounted externally. In a first test, a fruit preparation was pumped through an HF field. Owing to the high product viscosity and the associated longer product residence time, an excessively high temperature of 30° K occurs on the inside of the quartz glass tube compared to the core flow.

[0037] In order to sufficiently heat the product in the core flow, the delivery rate must be adjusted so that a temperature of 70°C is obtained internally. Here, temperatures above 100° C. are reached on the tube walls, which seriously impairs the quality of the fruit preparation.

[0038] In the second test carried out according to the method of the invention, a double set of quartz glass tubes was u...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The method is used for pasteurising and sterilising products in bottles or cans in which the product is raised to the set temperature and other areas are cooled by heat transfer by water or oil flow through tubing or other means.

Description

technical field [0001] The invention relates to a method for homogeneous heating of products, in particular for homogenizing the temperature distribution in foodstuffs, medicines and / or cosmetics when heated in a high-frequency alternating electromagnetic field. Background technique [0002] Heating methods are required in order to degerm foods or pharmaceuticals to make them durable. An example is the pasteurization or sterilization of food products, eg preservation in glassware or jars. [0003] Methods for heating the product using heat exchangers or steam autoclaves are known. Thus, for example, milk is heated during pasteurization in a plate heat exchanger, held at pasteurization temperature for a certain period of time, and then cooled again. This method is suitable for liquid food and has been proven for a long time. [0004] Storage jars or glassware with vegetables, fruit, fast food (Fertiggerichten), one-pot cooking (Eintpfen) or similar contents are almost exc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H05B6/46A23L3/005
CPCA23L3/005H05B6/62
Inventor P·艾斯纳T·普法伊费尔
Owner FRAUNHOFER GESELLSCHAFT ZUR FOERDERUNG DER ANGEWANDTEN FORSCHUNG EV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap