Thermostatic mixer with device for dynamic regulation of water flow

Abstract

The invention relates to a thermostatic mixer, including a device for the dynamic regulation of the cold water flow. The device comprising in a body a slide designed for sliding in axial translation inside the body and for narrowing the feed passages for the warm water and for the cold water in opposite directions in order to change their mixing ratio, an expansion thermocouple connected to the slide for actuation of the same and extending in the discharge passage for the mixed water, a spring acting on the thermocouple, means for adjusting the idle position of the thermocouple. According to the invention, an annular feed chamber is formed in the area of the cold water feed passage inside the slide; furthermore the mixer has a hollow cylinder disposed inside the slide and provided for displacement in axial translation between a first position, in which it narrows the passage between the annular chamber and the space between the slide and the piston, and a second position, in which the piston does not narrow this passage, that the mixer comprises a second spring acting between the slide and the piston in such a direction that it acts on the piston toward the first position, that the piston is provided with reduced radial passages penetrating it and located in the region of the annular feed chamber when the piston is in its first position; and that the piston has a transversal wall separating the space inside the piston into an intermediate chamber and a discharge chamber and in which an axial limited flow passage is located. The device is basically not influenced by changes of feed pressure.

Description

Technical field [0001] The invention relates to a thermostatic mixer, which includes a device for dynamically adjusting the flow of cold water for supplying water to the mixer. Background technique [0002] When the required flow rate is much less than the maximum flow rate, the thermostatic mixer suitable for achieving a larger flow rate can no longer work as specified. When the thermostatic mixer suitable for supplying equipment with multiple shower devices is used to supply a unique This happens when showering. In this case, the thermostatic mixer loses its stability and falls into fluctuations, so the water flow derived from the mixer always suffers from changes in the mixing ratio of cold water to hot water and therefore suffers from temperature fluctuations, which is uncomfortable for the user And can be dangerous. This shortcoming can be eliminated by the following way, that is, when a small flow of mixed water is required, a resistance is reacted to the cold water flow ...

AI Technical Summary

Problems solved by technology

This has the consequence that, on the one hand, for correct functioning, the device must be adapted in its installation to the pressure conditions present in the installation and, on the other hand, that the device does not function properly when there are unfavorable changes in the input pressure of the cold water. normal again

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