Medium-high temperature glass metal evacuated tube solar collector

Abstract

Disclosed is a medium-high temperature glass metal evacuated tube solar collector. A tube body is a single-layer heat collecting tube, a 'U'-shaped tube is arranged in an inner cavity of the single-layer heat collecting tube, one vertical tube of the 'U'-shaped tube is a cold water tube, the other vertical tube of the 'U'-shaped tube is a hot water tube, a fin plate is fit on the hot water tube, the cross section of the fin plate is arc-shaped, a heat absorption layer is coated on the outer side face of the arc-shaped fin plate, a horizontal ring projection is designed on the upper portion of the single-layer heat collecting tube and close to the periphery of the inner side wall of an open end of the single-layer heat collecting tube, a soft sealing plate is arranged below the ring projection, the vertical side wall of the sealing plate is inclined inwards and fit with the ring projection to form a sealing structure, a circular supporting plate is arranged below the sealing plate, a vertical pull rod is connected above the supporting plate, an upper end opening of the single-layer heat collecting tube is sealed by a pressing cover, the pull rod penetrates the pressing cover and is connected with a nut in a threaded manner, and the cold water tube and the hot water tube penetrate the sealing plate and the pressing cover and then are connected with a cold water header and a hot water header respectively. The failure rate and the damage rate of products are greatly reduced, and the medium-high temperature glass metal evacuated tube solar collector is low in use cost, high in heat collecting efficiency and simple and convenient to maintain.

Description

technical field [0001] The invention relates to a tube type heat collecting unit of a solar water heater, in particular to a tube type solar heat collecting unit adopting a single-layer vacuum tube. Background technique [0002] Traditional solar water heaters, whether they are multi-layer top-mounted or high-rise balcony wall-mounted, use double-layer vacuum tube solar heat collection units. This form of solar heat collection unit is a double-layer vacuumized glass tube. The outer wall of the layer tube is coated with a heat-absorbing coating, and the inner cavity of the inner layer tube directly communicates with the water tank or the heat collector header. After the inner tube wall absorbs heat, the water in the cavity is directly heated, and the hot water enters the water tank by convection. middle. The solar collector unit with this structure has the following disadvantages: 1. The cost of the double-layer vacuum tube is high and the processing is difficult; 2. The wat...

AI Technical Summary

Problems solved by technology

The solar collector unit with this structure has the following disadvantages: 1. The cost of the double-layer vacuum tube is high and the processing is difficult; 2. The water temperature in the tube is difficult to reach a higher temperature, which cannot meet the heating needs of some industrial projects; 3. The tube directly Water storage, the pipe body is easy to freeze and crack in the cold winter, resulting in an increase in use costs

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