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Cooling device and method therefore for co2 washing machines

Inactive Publication Date: 2013-07-04
ELECTROLUX LAUNDRY SYST SWEDEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention is aimed at providing an improved cooling arrangement for a fluid during storage. The technical solution provided is simple and involves a second cooling step involving a decrease in pressure of the fluid as it passes through a regulator and enters the storage device. This further lowers the temperature of the fluid, ensuring efficient cooling.

Problems solved by technology

A drawback with the prior art systems is that they use cooling arrangements such as plate heat-exchanger for cooling the fluids in the system.
This type of cooling device uses refrigerants, for example R404 refrigerant, which is not environmental friendly.
The use of this type or similar refrigerant is surrounded by governmental rules which therefore make it cumbersome to use.
Furthermore it also increases the production cost since more complex solutions needs to be used in order to comply with the rules.
Due to the low working temperatures of prior art system a further drawback is that the refrigerant needs to be cooled in order to have a cooling effect on the fluids in these systems.

Method used

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  • Cooling device and method therefore for co2 washing machines
  • Cooling device and method therefore for co2 washing machines
  • Cooling device and method therefore for co2 washing machines

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Embodiment Construction

[0024]FIG. 1 shows a dry cleaning apparatus according to the present invention comprising a storage device 1, a compressor 2, a cooling unit 3, a cleaning chamber 4 for cleaning fabrics, a distiller 5, a refill tube 6 and a regulator 7. The dry cleaning apparatus preferably uses carbon dioxide as solvent fluid which is stored in the storage device 1.

[0025]When a cleaning program is started the fluid is transferred via pipes to the cleaning chamber 4 in order to clean the articles that are present in the cleaning chamber 4. In order to have the fluid in the right phase where the cleaning effect is as effective as possible the compressor unit 2 builds up a pressure in the apparatus.

[0026]However the compressor unit 2 does not necessarily directly influence what phase the fluid is in, within the cleaning chamber 4, during e.g. a cleaning process. This is dependent on the temperature and / or pressure in accordance with the ideal gas law or related laws. For example the temperature can be...

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PUM

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Abstract

The present invention relates to a dry cleaning apparatus comprising an arrangement for cooling fluid being used as solvent in the apparatus, and a method for cooling the fluid. The cooling unit (3) is arranged so that it can cool the fluid by using

Description

FIELD OF THE INVENTION[0001]The present invention relates to dry cleaning systems namely washing machines using dry solvents such as carbon dioxide. In particular the present invention relates to a cooling device and method for cooling solvents being used in such systems.BACKGROUND OF THE INVENTION[0002]Washing systems using dry solvents such as carbon dioxide have been known for several years. In recent years this technology has become more popular mainly due to the environmental advantages compared to other washing systems using different solvents. Known dry cleaning systems usually contain a cleaning chamber wherein e.g. fabrics are cleaned, a distiller for separating the carbon dioxide from contaminants so that the carbon dioxide can be reused, a storage tank for storing the carbon dioxide when not in use for cleaning, a cooling unit, and a compressor for moving solvents in the system and for building up a pressure in the system. One example of such a system is disclosed in EP 1...

Claims

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Application Information

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IPC IPC(8): F25D31/00
CPCD06F43/08F25D31/00D06F43/083
Inventor JASSANI, AHMED ALKARLSSON, HAKAN L.
Owner ELECTROLUX LAUNDRY SYST SWEDEN