Automatic cold water and hot water diverting valve

Abstract

The invention discloses an automatic cold water and hot water diverting valve, which comprises a valve body provided with a valve cavity, wherein the valve body is provided with a water inlet, a cold water outlet and a hot water outlet that are communicated with the valve cavity; a piston type valve core is further arranged in the valve cavity; two-way shape memory alloy is further connected between the valve core and the valve body; a phase transition temperature of the two-way shape memory alloy is 40-55 DEG C; when the temperature of the two-way shape memory alloy is less than the phase transition temperature, the valve core can block the hot water outlet and communicate the water inlet with the cold water outlet; and when the temperature of the two-way shape memory alloy is greater than the phase transition temperature, the deformation occurs so that the valve core can displace to block the cold water outlet and communicate the water inlet with the hot water outlet. The automatic cold water and hot water diverting valve can automatically divert a cold water part in a hot water supply pipe so as to save water and avoid waste; and further the automatic cold water and hot water diverting valve is simple and compact in structure, low in cost and convenient to install, and achieves the automatic control.

Description

technical field [0001] The invention relates to a control valve device for a hot water supply system, in particular to a cold water and hot water automatic diversion valve capable of diverting cold water and hot water. [0002] Background technique [0003] Modern homes, hotels, schools and other places all have hot water supply systems installed so that users can use hot water. However, when hot water is in use, a section of cold water generally remains in the water supply pipe. The hot water will flow out only after the cold water needs to be drained. This will result in a waste of cold water. Especially when using a water heater to provide hot water and the water heater is far away from the water point, this problem is particularly prominent. [0004] In the prior art, there are some technologies that can solve the above problems. For example, a recyclable cold water outlet device disclosed in China's patent application number 200820214233.1 mainly includes a cold and...

AI Technical Summary

Problems solved by technology

[0005] Although the above-mentioned device can recycle cold water, it needs to use a temperature detection mechanism to detect the water temperature, and a complex control unit is required to control the water flow

Therefore, there are defects such as complex mechanism, high cost, and inconvenient installation.

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