Product for the cleaning of refrigeration installations, method and device for purging of the same
AssigneeDehon SAS
InventorsSerge Francois, Francoise Brisset
Life of this patent
Estimating the term…
Abstract
The invention relates to a cleaning fluid for a refrigeration plant, characterized in that it comprises a cleaning oil mixed with a liquefied carrier gas with which it forms, by expansion, a cleaning foam, for example the oil is a POE or a PAG and the gas is R134a. The invention also relates to a cleaning method. This comprises the following steps: the step of creating a foam from the oil and a liquefied gas in which it is at least partly miscible; the step of making the foam circulate in the said component; and the step of extracting the foam. In particular, the plant is rinsed with the gas separated from the cleaning foam, in order to remove the oil residues.
Claims19
Cleaning fluid for a refrigeration plant, characterized in that it comprises a cleaning oil mixed with a liquefied carrier gas with which it forms, by expansion, a cleaning foam.
Fluid according to the preceding claim, in which the liquefied gas has a boiling point at atmospheric pressure below 20° C., preferably below −20° C.
Cleaning fluid according to one of the preceding claims, consisting of 20 to 40% cleaning oil and 80 to 60% liquefied gas.
Cleaning fluid according to one of the preceding claims, contained in a pressure-resistant container so that it forms a foam when it is extracted from the container, to be circulated through the component to be cleaned.
Method of cleaning a component of a refrigeration plant by means of a cleaning oil, characterized in that it comprises the following steps:
- the step of creating a foam from the oil and a liquefied gas in which it is a least partly miscible;
- the step of making the foam circulate in the said component;
- and the step of extracting the foam.
Method according to the preceding claim, in which the extraction step is carried out by circulating, in the component, an extraction fluid at least partly miscible with the cleaning oil.
Method according to the preceding claim, in which the extraction fluid is at least partly formed from the said liquefied gas.
Method according to the preceding claim, in which, after the foam has been extracted from the component, this foam is collected in a recovery container and extracted from this container is the gas phase that is made to circulate through the said component.
Method according to the preceding claim, in which the said gas phase is extracted by means of a transfer machine by means of which the gas is liquefied before it circulates through the said component.
Device according to the preceding claim, comprising a transfer machine, that can be interposed by means of valves between a gas outlet of the recovery means and the inlet of the component, in order to carry out the rinsing step by the liquefied gas.
Device comprising a vacuum pump that can be connected via valves to the entire cleaning circuit in order to create a vacuum.
Dependencies are inferred from the claim text.