Device in or for high-pressure cleaning units for heating the wa

Details Device in or for high-pressure cleaning units for heating the wa Device in or for high-pressure cleaning units for heating the wa

1984-11-21

1987-08-18

Kashnikow, Andres

Fluid sprinkling, spraying, and diffusing

With system fluid relief or return to supply

By pressure responsive means

239135, B05B 903

Patent

active

046871381

ABSTRACT:
In high-pressure cleaning units with heating stages, i.e. with a possibility for circulating a partial flow of the forwardly pumped water through a constricted, heat-generating nozzle (74) in a return conduit to the pump's inlet side, the problem occurs that the entire water flow circulates at high pump pressure upon temporary interruption of ejection, which causes an inexpediently high heating of the water. By the invention, apparatus is provided for sensing this situation and thus block the return conduit (70,72), so that the pressure tends to rise; in this way, however, the cleaning unit's ordinary bypass valve (12) will sense that delivery from the pump (P) is totally blocked, whereby it connects the pump in bypass state in the ordinary way through a non-constricted bypass connection (14). In this way, ejection can be interrupted temporarily without any substantial heat accumulation in the circulating water, and another advantage is that the ejection conduit itself is pressure relieved in the situation.

REFERENCES:
patent: Re27855 (1973-12-01), Norstrud et al.
patent: 2942787 (1960-06-01), Bok et al.
patent: 3013730 (1961-12-01), Bok et al.
patent: 3246845 (1966-04-01), Techler et al.
patent: 3383044 (1968-05-01), Norstrud et al.
patent: 4182354 (1980-01-01), Bergstedt

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