Foreword
The use of air conditioners is increasing year by year, and the installation, maintenance and repair of air conditioners are becoming increasingly important. In order to provide air conditioners repair technicians and readers with timely knowledge of cooling thermal principles of air conditioners, installation and maintenance, control principles of electrical panels and maintenance, the book provides detailed descriptions of wall-mounted air conditioners, cabinet air conditioners, frequency air conditioners and new air conditioners in a graphical manner。
The book contains seven chapters, the first of which describes the underlying theory of air conditioners, including the thermodynamic fundamentals, the state of the refrigerant and the commonly used state terminology, and provides the reader with the most basic theoretical knowledge, as well as the refrigeration, thermal working principles and the control functions and principles of the variant air conditioner, and provides the reader with a better understanding of the system principles of the air conditioner as a whole and a solid theoretical basis for subsequent physical maintenance. Chapter 2 is presented in graphic form as a physical autopsy of the main components of the air conditioner unit so that maintenance personnel and self-students can quickly master the structure and work processes of the unit. Chapter 3 describes the demolitions of wall-mounted air conditioners, cabinet air conditioners indoors and external units, together with an overall decomposition of the air conditioners, which provides the reader with an intuitive view of the overall structure of the air conditioners, as well as an electrical circuit of the air conditioners. Chapter 4 describes the installation techniques for air conditioners, including the selection of the air conditioner installation site, the location of the interior, the outer unit and the installation steps for the complete unit, and concludes with the method of removal of several common air conditioners after installation. Chapter 5 uses commonly used refrigeration maintenance tools to describe the maintenance of air conditioner refrigeration (thermal) systems, including basic operation of air conditioner maintenance, vacuum and leakage of refrigeration systems, refrigerant charge, refrigerant recovery, electrical infrastructure, etc., and finally methods of repair of air conditioner refrigeration systems. Chapter 6 describes the electrical control principles and maintenance of air conditioners and lists, in graphic form, the functions of typical microprocessors to control circuits, together with a detailed description of maintenance techniques for the electrical control component. The maintenance of air conditioners is described in chapter 7, which describes, mainly in the form of examples of maintenance, the physical maintenance and troubleshooting of different types of air conditioners in different manufacturers. The maintenance personnel are able to enter the room for rapid troubleshooting purposes. The chapter also highlights the maintenance techniques of air conditioners and the overhaul of critical components。
The book, which is well-written, linguistically well developed, is gradual, gradual and easy to understand. It is an essential guide book for air conditioners and maintenance personnel. It is also available to teachers and students at universities and colleges as a teaching material。
The text of this book and the processing of pictures have been greatly assisted by zhao hedan and cao cao, and i would like to express my sincere gratitude。
Due to the limited level of authorship and the short time available, it is inevitable that inappropriateness is present in the book。
Editor
