Flat solar heat absorption coated plate production method and vertical coating apparatus

Abstract

The invention provides a flat solar heat absorption coated plate production method. A large area sheet metal is used as a substrate; two sides of each sheet rack can be equipped with metal substrates; a speed reducer outside a vacuum chamber drags a transmission mechanism to drive sheet racks travel straight, and the sheet racks continuously enter into magnetic-control sputtering targets and corresponding sputtering cavities of a continuous coating chamber one by one with a uniform velocity, wherein each sputtering cavity is equipped with magnetic-control sputtering targets on two sides thereof, so that the metal substrates on two sides of a sheet rack can be deposited with films, such as an infrared light reflecting layer / a heat absorption function layer / an antireflection layer, in asolar heat absorption functional film The invention also provides a vertical coating apparatus for the flat solar heat absorption coated plate production. The apparatus includes sheet racks, a front vacuum lock chamber, a front hold chamber, a front buffer area, a continuous coating chamber, a back buffer area, a back hold chamber and a back lock chamber, so as to double the production efficiencyof a horizontal coating apparatus. The heat absorption coated plate of the invention has advantages of a high absorptivity and a low emissivity. In addition, high production efficiency and low costs can be realized through the present invention.

Description

Technical field: [0001] The invention relates to the field of solar light and heat utilization, in particular to a method for producing a flat solar heat absorbing coating plate and a vertical coating device. Background technique: [0002] Solar energy is a new energy source in the 21st century. Solar refrigeration, solar water heaters, solar power generation, and seawater purification are all important application fields. Selective heat-absorbing films have the performance advantages of high absorptivity in the visible-near-infrared region and high reflectivity in the infrared region, and their production methods and devices have become an important research direction for solar energy utilization technology. There are several types of production methods for solar selective heat absorbing films currently used, and they all have corresponding limitations: [0003] Glass tube vacuum tube type: the two ends of two glass tubes with different diameters are sealed together, and t...

AI Technical Summary

Problems solved by technology

Its disadvantages are: it is fragile when colliding, and it is easy to explode when the water is cut off. At the same time, it is not suitable for building outer walls and roofs when building energy conservation is integrated.

[0004] Ordinary flat heat-absorbing coating: use electroplating, brushing, etc. to form a heat-absorbing coating on the metal substrate. way of polluting the environment

The disadvantage is that the evaporation cloud of the plating material obtained by a single electron gun is not enough to cover the width of the substrate, and two electron guns need to be used in combination to meet the uniformity of the width. At the same time, due to the high deposition rate, it is difficult to control the film thickness. For deposition The thickness of the metal layer is only about 10hm, and the solar heat absorbing film layer of the dielectric-metal interference film group is more difficult to control when the optical thickness accuracy is about 2 to 3nm

[0006] The existing continuous coating device, as described in Chinese patent 200420077693.6, is a coating for circular glass tubes. The entire production line "constitutes a closed loop" from the exit to the entrance to the continuous coating chamber as described in claim 1. The workpiece must also rotate, which cannot Production of flat solar heat absorbing coated panels with large area (the length direction of a single coated panel is greater than 600mm and the width direction is greater than 300mm)

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