FR2975758A1 - Device for recovering cold water contained in hot water circuit used in e.g. domestic facilities, for e.g. directing toward tank used for watering garden, has switch allowing water displacement along direction by blocking opening of device - Google Patents

Abstract

The device has a tap or a valve comprising a device with three openings, where the first opening is connected to a hot water pipe. Cold water passes into the first opening, and is directed to a water recovery circuit by the second openings when the tap or the valve is in an open position. A thermal switch allows displacement of water along direction or another direction of a water system in turn by blocking one of the three openings of the device according to temperature of water. The switch blocks the second opening and releases the third opening after the switch is deformed.

Description

-1-

The present invention relates to a device for recovering the cold water that is found in the pipe, between the hot water manufacturing system and the faucet, integrated in the faucet.

When we open the hot water faucet, it does not come right away because it is still in the hot water system. The incoming water is the one that has not yet come out of the hot water circuit when the previous tap is opened and is no longer in the hot water system. She became cold again in the pipe. It is usually rejected in the system at the mains and definitely lost precisely because it is cold and we want hot water. This results in a significant waste of this precious natural resource (At least 31 each time).

The device according to the invention makes it possible to recover this water, usually discarded, for reuse. It can be re-injected into the water circuit and heated again or directed to a tank for watering a garden or filling a pool or for any other use. The device comprises, according to a first feature, an orifice for connecting the hot water pipe. When the valve is opened, the still cold water passes into this first orifice and is directed into the water recovery circuit via a second orifice. This is the closed position. When all the cold water contained in the pipe gives way to the hot water leaving the heating device, the temperature of the latter acts on a bimetallic strip. This bimetal, by deforming, obstructs the second orifice of the device and then releases the third orifice. This is the open position.

The hot water is directed at that moment, leaving the third port of the device, to the usual circuit and out of the tap. When the water in the device and the pipe becomes cold again some time after the valve is closed, the bimetallic resumes its original position and the system is again in the closed position.

The accompanying drawing, in Figure 1, illustrates the operating principle of the invention with one of the 3 solutions: already described in two previous patent applications. Indeed, one or the other of the three solutions described in patent applications Nos. 01976 and 1100691 is directly integrated into the tap. 2975758 -2-

The device according to the invention is particularly intended for the recovery of cold water contained in the pipe of the hot water circuit of domestic, public, professional or industrial installations.

Claims (1)

CLAIMS1) Device for recovering the cold water contained in the domestic hot water circuit, public, professional or industrial, between the hot water generator and the outlet circuit characterized in that it consists of a tap or a valve and that it comprises a device with three orifices and a bimetallic causing depending on the temperature of the water movement in one direction or another of a system by obstructing one of the three orifices of the device in turn.