A vacuum defoaming barrel filling method of phase change material suitable for prefabricated high porosity building blocks

By using a vacuum defoaming barrel filling method to pre-seal and defoam precast blocks, the problems of uneven phase change material filling and encapsulation failure are solved. This method achieves efficient and uniform phase change material filling and stable encapsulation effect, making it suitable for factory production.

CN122404022APending Publication Date: 2026-07-17HENAN UNIVERSITY OF TECHNOLOGY +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HENAN UNIVERSITY OF TECHNOLOGY
Filing Date
2026-05-16
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

In the existing technology, the phase change material injection of precast blocks has problems such as uneven filling, pore blockage, material waste and encapsulation failure, resulting in low injection saturation, uneven distribution and long-term energy storage efficiency decline.

Method used

The vacuum defoaming tank injection method is adopted. First, the surface of the precast blocks is pre-sealed. Then, under vacuum conditions, negative pressure defoaming and degassing are used. Combined with a hollow stainless steel mesh basket, the phase change material is permeated and filled. Temperature control process is used to avoid solidification and blockage. Finally, the surface is sealed.

Benefits of technology

It achieves uniform filling of phase change material, improves filling saturation and uniformity, reduces material loss rate, ensures packaging stability and long-term service performance, and is suitable for factory production.

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Abstract

The application discloses a kind of phase change material vacuum defoaming barrel filling methods suitable for prefabricated high porosity block, it is related to phase change energy storage building material preparation process technical field, including the following steps: to the maintenance of prefabricated high porosity block to design age, retain top surface filling surface, the rest outer surface is coated with epoxy resin sealant normal temperature solidification, form pre-sealing layer;Organic phase change material is heated to higher than its phase transition temperature 10~15 ℃ liquefaction and heat preservation;Pre-sealing block is loaded into openwork stainless steel mesh basket with filling surface upwards, overall is placed into vacuum defoaming barrel, inject phase change material to cover top surface, heating station overall heat preservation;After vacuum negative pressure filling, pressure relief, overall is taken out and drained remaining material, at service temperature environment cooling solidification, top surface sealing solidification is obtained finished product;The application realizes prefabricated block phase change material efficient uniform, low consumption safe batch filling by first pre-sealing then vacuum defoaming barrel mesh basket type filling process.
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