前言地坪与顶棚隔热工程的质量在冷藏及空调房间的经营管理方面是节省能源的一项重要保证。地坪隔热工程在本刊第480期(1980年1月出版)上已作了介绍(译文见“冷藏技术”1980年度第四期);本文则要对顶棚隔热工程进行初步探讨。现已证实制冷工艺和隔热材料的发展一般足以确保工程的安全性与赢利性。设备设计时必须注意到:顶棚隔热工程与框架的结构问题是不可分割的。目前越来越趋 Foreword The quality of floor and ceiling insulation projects is an important guarantee for saving energy in the operation and management of refrigerated and air-conditioned rooms. The floor heat insulation project has been introduced in the 480th issue (published in January 1980) of this publication (for the translation, please refer to “Cold Technology” 1980, the fourth edition); this article will carry out a preliminary discussion of the roof insulation project. It has been confirmed that the development of refrigeration processes and insulation materials is generally sufficient to ensure the safety and profitability of the project. Equipment design must be noted that the structural problems of the roof insulation project and the frame are inseparable. Increasingly