Secondary circulation system
OwnerKarsten Laing, Doerte Laing +1inventors
InventorsKarsten Laing, Doerte Laing, Birger Laing
Life of this patent
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Abstract
A domestic hot water system in which the remote end forms a loop connected to the hot water tank and in which a pump circulates hot water at a rate sufficient to prevent cooling of the water in the piping below a predetermined temperature, so that hot water can flow immediately out of all outlets.
Claims5
Circulation system for secondary circulation in a domestic hot water system composed of a distribution pipe, a circulation pipe for secondary circulation, and a pump with a pumphousing having the two openings for inlet and outlet of water, which together form a loop, whereby both ends of the loop communicate with the heat source, e.g. a tank characterized in that
- the circulation pipe (9), having an inner diameter of about 1/4 inch, is situated within the distribution pipe (2),
- the first end of the circulation pipe (9), communicates with the pump (3,4),
- the second end of the circulation pipe (9) communicates with the hot region of the heat source (1) (e.g. the upper level of a tank),
- between the first end of the circulation pipe (9) and one opening of the pumphousing a valve (22, 23) is arranged,
- the other opening of the pump housing communicates with the interior of the heatsource (1) via a tube (28),
- between said tube (28) and said other opening of the pump housing a valve (26, 27) is arranged,
- one of the two valves (22, 23, 26, 27) being a checkvalve, preventing backflow through the pump housing caused by pressure difference between the second end of the circulation pipe (9) and the distribution pipe (2).
Circulation system for secondary circulation in a domestic hot water system composed of a distribution pipe, a circulation pipe for secondary circulation, and a pump with a pumphousing having the two openings for inlet and outlet of water, which together form a loop, whereby both ends of the loop communicate with the heat source, e.g. a tank characterized in that
- the circulation pipe (9), having an inner diameter of about 1/4 inch, is situated within the distribution pipe (2),
- the first end of the circulation pipe (9), communicates with the pump (3,4),
- the second end of the circulation pipe (9) communicates with the the end portion of the distribution pipe (2)
- between the first end of the circulation pipe (9) and one opening of the pumphousing a valve (22, 23) is arranged,
- the other opening of the pump housing communicates with the interior of the heatsource (1) via a tube (28),
- between said tube (28) and said other opening of the pump housing a valve (26, 27) is arranged,
- one of the two valves (22, 23, 26, 27) being a checkvalve, preventing backflow through the pump housing caused by pressure difference between the second end of the circulation pipe (9) and the distribution pipe (2).
Dependencies are inferred from the claim text.