Apparatus for controlling a soap concentration in cleaning solvent
US4867193A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1989 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Jan 26, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2509
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A soap concentration control apparatus comprising: a pump for supplying a cleaning solvent to a washing tub; a liquid quantity sensor for measuring a quantity of the solvent supplied to the washing tub by the pump; a soap supplying pump for supplying a soap to the washing tub; a sampling container for sampling the solvent; a soap concentration measuring sensor for measuring a soap concentration in the sampled solvent; a setting device for setting a desired soap concentration; an arithmetic device for calculating an operating time of the soap supplying pump required for making a soap concentration of the solvent in the washing tub approach to the set desired soap concentration on the basis of the measured quantity of solvent, the measured soap concentration and the soap supplying capacity per unit time of the soap supplying pump; and a controller for operating the soap supplying pump on the basis of the calculation result of the arithmetic device, which is useful to maintain a desired soap concentration in the dry cleaning machine thereby providing a constant finish of the laundry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.