Hydraulic pressure type hot water recovery unit

Abstract

The invention discloses a hydraulic pressure type hot water recovery unit, relating to a water-saving frost crack resistant device and aiming at providing a hydraulic pressure type hot water recovery unit which has simple structure, saves water and energy and can prevent pipelines from frost crack. The recovery unit is composed of a blowoff valve, a cold water pipe, a cold water tank, a cold water valve and a water pump, wherein the blowoff valve comprises three working holes, the first working hole is communicated with a hot water tank, the second working hole is communicated with an outlet valve via a hot water pipe, and the third working hole is communicated with external air; one end of the cold water pipe is connected on the junction of the hot water pipe and the outlet valve, and the other end thereof is arranged in the cold water tank; the water pump and the cold water valve are arranged on the cold water pipe; and the cold water tank is internally provided with a water level sensing device. When the outlet valve is opened, the first working hole and the second working hole of the blowoff valve are communicated, and the cold water valve and the water pump are closed; when the outlet valve is closed, the cold water valve is opened, and the water pump is started; and when the water level sensing device senses a low water level, the water pump is closed, and the second working hole and the third working hole are communicated.

Description

technical field [0001] The invention relates to a water-saving antifreeze cracking device, in particular to a hydraulic hot water recovery device. Background technique [0002] Solar water heaters are generally composed of three parts: heat collectors, hot water tanks, and upper and lower water pipes. The heat collectors and hot water tanks are generally installed on the top floor of buildings, and the water outlet valve is connected to the user's home through a long hot water pipe. After the water outlet valve is closed for a period of time, the hot water retained in the hot water pipe will gradually become colder. After the user opens the water outlet valve again, it usually takes a period of cold water to flow out before hot water flows out. When the temperature is low in winter, the water remaining in the hot water pipe will also freeze and crack the hot water pipe. In order to prevent the hot water pipe from freezing and cracking, the current method is to install an ele...

AI Technical Summary

Problems solved by technology

Although the electric heat tracing method solves the problem of freezing hot water pipes, but this method consumes more power and has potential safety hazards

The pipe emptying method is to release the hot water in the hot water pipe after use to make the pipe "empty". Although this method can solve the problem of freezing and cracking of the hot water pipe, it will cause a The waste of water resources also causes the waste of heat energy

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