Zero cold water system and gas water heater

Abstract

The invention discloses a zero cold water system and a gas water heater. The zero cold water system includes a water heater, a cold water pipe, a hot water pipe, a circulating pipe, a first regulating mechanism and a second regulating mechanism. The hot water pipe includes an inner pipe and an outer pipe sleeved on the inner pipe. The inner pipe forms an inner passage, and the inner pipe and the outer pipe form an outer passage. The inner passage and the outer passage communicate with each other at the end of the hot water pipe away from the water heater. The two ends of the circulation pipe are respectively connected to the outer pipe and the cold water pipe and communicate with the outer passage and the cold water pipe, the first adjustment mechanism is arranged in the outer passage, and the second adjustment mechanism is arranged at the end of the circulation pipe near the hot water pipe. Wherein, when the temperature in the hot water pipe is lower than the threshold value of the first regulating mechanism, the first regulating mechanism regulates that the outer channel is disconnected from the water heater, and the second regulating structure regulates that the outer channel communicates with the circulation pipe. The circulation circuit path is relatively short, which reduces the air consumption of each cycle, and effectively avoids the problem of self-starting of the water heater.

Description

technical field [0001] The invention relates to a zero cold water system and a gas water heater. Background technique [0002] At present, the gas water heater with zero cold water function has the trend of popularization gradually. Zero cold water means that when the gas water heater is used, there will be hot water when the tap is turned on, which saves the time spent waiting for the cold water in the pipeline to be drained. [0003] like figure 1 Shown, the existing zero cold water circulation circuit is: cold water pipe 6 ', water heater water inlet, water heater 9 ', water heater outlet, hot water pipe 1 ', cold water pipe 6 '. The circulation loop is too long, and the gas consumption per cycle is large. [0004] The existing zero cold water system also has the problem of self-starting, that is, when cold water is used in the cold water pipe 6' (such as flushing the toilet), a part of the water flow is directly replenished from the water inlet end 61' of the cold wat...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the defect that the circulation loop of the zero-cooling water system in the prior art is too long, resulting in a large cycle gas consumption, and to provide a zero-cooling water system and a gas water heater

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