Metal vacuum insulation board with extraction opening and preparation method of metal vacuum insulation board

Abstract

A metal vacuum insulation board with an extraction opening comprises a housing, core materials and a vacuum cavity, and is characterized in that the housing is a metal plate or a metal composite plate; the core materials are positioned in the vacuum cavity, provide additional strength for the housing, and ensure the smoothness of the housing under the atmospheric pressure; the vacuum cavity is closed and formed in such a way that the housing is subjected to welding and edge sealing under the normal pressure and sealing at a high temperature in vacuum; the sealing is achieved through automatically sealing the extraction opening, prefabricated in the housing, in a vacuum furnace by low-temperature solder according to a liquid sealing principle; and the low-temperature solder comprises low-temperature metal and alloy solder. The metal vacuum insulation board with the extraction opening has the advantages that the preparation method is simple in process, the prepared metal vacuum insulation board with the extraction opening can overcome defects in a conventional insulation board and a conventional vacuum insulation board, and the strength, the heat insulation performance, the sound insulation performance, the fire resistance and the decoration performance can be enhanced.

Description

technical field [0001] The invention relates to a vacuum heat insulation panel, in particular to a metal vacuum heat insulation panel with an air suction port and a manufacturing method thereof. Background technique [0002] my country's building energy consumption has accounted for more than 1 / 3 of the energy consumption of the whole society, and it is increasing year by year. The use of thermal insulation building materials is one of the main means to reduce building energy consumption. At present, many materials used for building exterior wall insulation are Class B insulation materials, such as polystyrene, polyurethane, foam rubber and other organic materials. These organic materials have poor heat resistance and are easy to burn. A large amount of toxic smoke can accelerate the spread of the fire; at the same time, organic materials will shrink during a fire, producing burning droplets, causing the tiles on the insulation layer to fall off, which may cause secondary fi...

AI Technical Summary

Problems solved by technology

At present, many materials used for building exterior wall insulation are Class B insulation materials, such as polystyrene, polyurethane, foam rubber and other organic materials. These organic materials have poor heat resistance and are easy to burn. A large amount of toxic smoke can accelerate the spread of the fire; at the same time, organic materials will shrink during a fire, producing burning droplets, causing the tiles on the insulation layer to fall off, which may cause secondary fires and secondary fires. harm, so the relevant state departments explicitly prohibit the use of organic insulation materials for external wall insulation, especially in high-rise buildings and public buildings

Among the thermal insulation materials whose combustion performance reaches the A-level standard, inorganic materials represented by mineral wool and rock wool are mainly used. However, the existing domestic products have a large gap with the requirements of architectural applications in terms of water absorption, strength, and weather resistance. If it is directly used for building wall insulation, there will be problems such as water absorption, falling, softening, etc.

In addition, the cost of Class A thermal insulation materials is much higher than that of organic materials, and the construction process is complicated. The construction cost far exceeds the cost of Class B thermal insulation materials, and its thermal insulation performance is poor and energy consumption is high, which cannot meet the current needs of the country for energy conservation and emission reduction.

[0003] Vacuum insulation panels are a new type of insulation material developed in recent years, mainly including vacuum bags and core materials. There are obvious disadvantages such as difficult drying of the core material, poor air tightness of the vacuum bag, low puncture resistance, high moisture content of the core material, fast vacuum attenuation, easy expansion of the bag, short insulation life, etc.

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