Middle box for solar hot water and heating engineering

Abstract

The invention provides a middle box for solar hot water and heating engineering and relates to a solar hot water and heating engineering system. The middle box is characterized in that the upper parts of headers are connected with the middle box through upper and lower communication pipes, and the headers are connected with heat collection pipes; a middle box ventilation hole is formed in the middle box, the middle box is connected with a water feeding pipe and a hot water pipe, a hot water pipe output port is formed in the lower part of the middle box and connected with the hot water pipe through a hot water valve, a water outlet of the water feeding pipe and a hot water pipe ventilation port of the hot water pipe are both formed inside the middle box, and water level gauges are arranged inside the middle box; a drain valve and a water feeding valve are arranged at the lower end of the water feeding pipe through a tee, and the lower end of the hot water pipe is connected with a hot water storage tank. A process of hot water collection between the heat collection headers and the hot water storage tank only relies on the gravity of water, a circulating pump is not used, and energy is not consumed. By the aid of the middle box, the hot water pipe and the water feeding pipe are empty when not in work, freezing is avoided, and pipe unfreezing measures are not needed.

Description

Technical field: [0001] The invention relates to a solar hot water and heating engineering system, in particular to a solar hot water and heating engineering intermediate box technology. Background technique: [0002] The solar collector uses the inner wall of the heat collecting tube to absorb solar energy to heat the water in the heat collecting tube. The hot water gradually gathers to the upper part of the header due to its low density. In order to collect hot water, the traditional method is to detect the water in the header and the hot water storage tank. Water temperature and temperature difference, when the set temperature difference is reached, the circulation pump is started to discharge the hot water from the upper part of the header into the hot water storage tank, and at the same time, the water with a lower temperature at the bottom of the hot water storage tank is sent into the header; [0003] Disadvantages: [0004] 1. Cold and hot water are continuously mix...

AI Technical Summary

Problems solved by technology

[0004] 1. Cold and hot water are continuously mixed during circulation. When the solar thermal energy is low, the temperature of hot water will drop due to the mixing of cold water, which will affect the normal use of the system;

[0005] 2. When the solar thermal energy is high, the circulation pump has a large number of invalid circulation work

[0006] 3. The circulation pipeline needs to be antifreeze

Increase system energy consumption, there is a fire hazard

[0007] 4. There will be air resistance in the circulation pipeline, which will affect the normal operation of the system

[0008] 5. The circulating pump starts frequently, the working hours are long, the cost of operation, repair and maintenance is high, and the cost is large

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