Solar water heater loop capable of preventing freeze and outputting hot water quickly

Abstract

The invention discloses a solar water heater loop capable of preventing freeze and outputting hot water quickly. The solar water heater loop comprises a water supply pipe communicating between a solar water heater water tank and a hot water outlet, an air storage case which communicates with a tap water supply pipe and is used for pressing air into the water supply pipe, and a water return pipe connected between the water supply pipe and the solar water heater water tank to return water discharged by the water supply pipe. According to the invention, pressure in the tap water supply pipe is used as power to drive air to push hot water in the pipeline to flow back to the solar water heater water tank after a user uses the hot water, thus smartly utilizing excess energy in existing systems, realizing recycling of the hot water in the pipeline, and solving the problems of low hot water output speed of the solar water heater and large possibility of icing of pipelines in winter; and furthermore, the functions of hot water supply, hot water recovery and cold water supply can be achieved at the same time and do not interfere with one another, thus facilitating users in use.

Description

technical field [0001] The invention belongs to the technical field of water heaters, in particular to a solar water heater circuit capable of preventing freezing and quickly producing hot water. Background technique [0002] Solar water heater is currently the most mature and widely used device in solar heat utilization technology. The heat collector and the water tank of the solar water heater are generally all installed on the roof of the building, which has just caused the following two problems: the one is that the length of the pipeline connecting the solar water heater water tank and the user's end is too long, so that every time the hot water is used. The cold water in the pipeline must be emptied first, which not only wastes water resources, but also is inconvenient for users to use. The 2nd, because the water tank of solar water heater is positioned at outdoor, the pipeline that connects solar water heater water tank and user's use end just might freeze when winte...

AI Technical Summary

Problems solved by technology

The heat collector and the water tank of the solar water heater are generally all installed on the roof of the building, which has just caused the following two problems: the one is that the length of the pipeline connecting the solar water heater water tank and the user's end is too long, so that every time the hot water is used. The cold water in the pipeline must be drained first, which not only wastes water resources, but also is inconvenient for users

Second, because the water tank of the solar water heater is located outdoors, when the temperature is below zero in winter, the pipes connecting the water tank of the solar water heater and the user end may freeze, making it impossible for users to use the water tank.

The problem with this solution is that, first of all, draining the hot water in the pipes wastes both the energy in the hot water and the water resources

Secondly, the hot water in the pipeline is discharged into the heat preservation water tank. If the hot water is not used for a long time, it will become cold. The setting of the heat preservation water tank increases the cost of investment, and there are many problems that will be encountered in actual use. Solve, such as what to do when the insulation water tank is full? How to connect the outlet pipe of the thermal insulation water tank and the outlet pipe of the solar water heater? Because the user is accustomed to using a fixed water outlet, connecting a separate water outlet to the insulation water tank does not conform to the user's usage habits

Moreover, connecting a separate water outlet to the thermal water tank can easily cause the user to suffer from insufficient water temperature or insufficient water volume during use.

To sum up, a good way to solve the freezing of solar water heater pipes in winter and slow hot water output is to replace the water in the pipes with air after the user has finished using the hot water, but the current technology has not been able to achieve this well. method

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