Solar water heater

Abstract

The invention discloses a solar water heater. The solar water heater is provided with a water tank, wherein a hot water pipe and a cold water pipe are communicated with the water tank; a four-way change-over valve is arranged below the water tank; the other end of the hot water pipe is communicated with a water returning port of the four-way change-over valve; the other end of the cold water pipe is communicated with a water filling port of the four-way change-over valve; a running water pipe is communicated with a water inlet of the four-way change-over valve; a water outlet pipe is connected to a water outlet of the four-way change-over valve; the hot water pipe is connected to the top of the water tank; a handle is arranged on the four-way change-over valve for regulating a valve core of the four-way change-over valve to control the communication state of the water inlet, the water filling port, the water returning port and the water outlet; and a micropressure control assembly is arranged on the hot water pipe, the cold water pipe and the four-way change-over valve. The position of the water outlet of the hot water pipe is changed to ensure that hot water is directly discharged by opening the four-way change-over valve. The solar water heater has the advantages of simple structure, convenient use, safety, reliability, comfortability and convenience of a pressure-bearing type solar water heater, simplicity and cheapness of a non-pressure-bearing type solar water heater, and high practicability.

Description

technical field [0001] The invention relates to a water heater, in particular to a solar water heater. Background technique [0002] In the past, solar water heating systems were divided into two types: pressure-bearing and non-pressure-bearing. Inexpensive, affordable, simple and efficient, it has been popularized, but there are still four major problems in the non-pressurized system that have not been completely overcome: one is to fill the cold water after the hot water is used up, otherwise the hot and cold water will be mixed, and the cold water needs to be preheated and stopped. For more than one day, it cannot work in a continuous cycle, which is very inconvenient to use; second, the outdoor pipes are easy to freeze and block; third, the long pipes are stranded and waste a lot of hot water; It is difficult to adjust the temperature due to undervoltage, and the comfort is not satisfactory. In addition, in order to grasp the water level and preheating degree, it is ne...

AI Technical Summary

Problems solved by technology

Although this structure can effectively solve the problem that the solar water heater must be installed higher than the water place, it has insufficient functions in terms of pressurization, water replenishment, non-return and emptying in practical applications.

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