MINISTRY OF EDUCATION AND TRAINING HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY FOR HIGH QUALITY TRAINING GRADUATION PROJECT AUTOMOTIVE ENGINEERNG RESEARCH AIR CONDITIONING SYSTEM AND DESIGN TEACHING MODEL LECTURER: VU DINH HUAN STUDENT: NGUYEN CONG KHANH NGUYEN MINH TRIET SKL012553 Ho Chi Minh City, Janury 2024 HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION FACULTY OF INTERNATIONAL EDUCATION GRADUATION PROJECT RESEARCH AIR CONDITIONING SYSTEM AND DESIGN TEACHING MODEL NGUYEN CONG KHANH Student ID: 19145191 NGUYEN MINH TRIET Student ID: 19145052 Major: AUTOMOTIVE ENGINEERING TECHNOLOGY Supervisor: MS. VU DINH HUAN. Ho Chi Minh City, January 2024 ii THE SOCIALIST REPUBLIC OF VIETNAM Independence – Freedom– Happiness -------- EVALUATION SHEET OF DEFENSE COMMITTEE MEMBER Student name: Nguyen Cong Khanh Student ID: 19145191 Student name: Nguyen Minh Triet Student ID: 19145052 Student name:. Major: Automotive Engineering Technology Project title: Research air conditioning system and design teaching model Name of Defense Committee Member:.
Content and workload of the project .) Ho Chi Minh City, month day, year COMMITTEE MEMBER (Sign with full name) vii DISCLAIMER Nguyen Cong Khanh and Nguyen Minh Triet, the writers, affirm that the work presented in this thesis is our own. All of the information and figures in the thesis are correct and have not been previously published in studies or study. I confirm that information obtained from other sources is mentioned in the thesis. 1 Acknowledgements Firstly, the team would like to express our sincere gratitude and deep appreciation to all the teachers of the Automotive Engineering Technology department, Faculty of Vehicle and Energy Engineering department, Ho Chi Minh city University of Technology and Education, who have cared for and taught us valuable knowledge and lessons so that the team could complete this project.
In particular, we would like to extend our thanks to our supervisor, Master Vu Dinh Huan, who directly guided us, patiently instructed us, and imparted practical knowledge and skills for us throughout the implementation of the project. At the same time, we would like to thank thesis advisor, Doctor Le Thanh Phuc for taking the time to read the graduation thesis and for giving us valuable comments and suggestions to help improve our thesis. Finally, We would like to thank our families and friends in the 19145CLA class, who have always accompanied, helped, and encouraged us so that we could complete the project in the best way. We sincerely thank you.
2 List Of Figures Figure. Dashboard installed HVAC system. Boot installed single zone HVAC system. Dual zone dashboard installed HVAC system.
Manual air conditioner. Automatic air conditioner. Air heating system. Air cooling system.
Positive and negative pressure across the surface of the vehicle. (a) Fresh air inlet; (b) Fresh air inlet Ford Fiesta. Air conditioning system. Structure of Through-Vane compressors.
Working principle of Through-Vane compressors. Structure of Variable Type Compressor. Working priciple of Variable Type Compressor. structure of scroll compressor.
Working principle of scroll compressor. Structure of Swash Plate Type (Fixed Displacement) .Operation of Swash Plate Type. Structure of magnetic clutch. Working principle of magnetic clutch.
Structure of condenser. Construction of multiflow subcool condenser. Structure of dryer. Structure of the block -type expansion valve.
Operation of the block -type expansion valve. Structure of Thermal Expansion Valve. Drawn Cup Type. Structure of evaporator.
Sight glass: (a) clear; (b) foamy; (c) streaky; (d) cloudy. The Electronic Automatic Temperature Control (EATC) system. : The automatic air conditioning system.The automatic air conditioning system consists of several components. Room temperature sensor.
Ambient temperature sensor .Evaporator temperature sensor .Water temperature sensor. Position of air mixing motor .working principle of air mixing motor. Position of air inlet motor. Operation of air inlet motor.
Position of air vent mode servo motor. Operation of air vent mode servo motor. Control the outlet air temperature (TAO). I2C Serial Interface 20x4 LCD Module.
R134a Pressure-Temperature chart. LCD display to Arduino wiring. DC-DC 3A LM2596 low-voltage power. Coolant Temperature Sensor for Kia Sportage 95-97 K857418840.
Steinhart and Hart Equation 1. Steinhart and Hart Equation 2-4. Solving the Steinhart and Hart Equation for Coefficients. Sensor raw data vs Steinhart and Hart Equation Chart.
G1/4 pressure transducer sensor. Pressure value of the model in compared with pressure gauge. Autodesk Inventor Professional. Inventor Professional sketch interface.
The model framework designed in Inventor Professional. 2D design of the model frame. Designing Electrical Panel with AutoCAD. Front of the heater control.
Back of the heater control .Electrical circuit diagram of the Lexus ES300 1996 air conditioning system .Electrical circuit diagram of the Lexus ES300 1996 air conditioning system. Heater control buttons. BI-LEVEL mode. FOOT/ DEF mode .BI-LEVEL mode.
FOOT/DEFROST (F/D) mode. FRESH AIR mode .Display pressure value at MAX COLD temperature level. Display pressure value at 25oC temperature level. Display pressure value at MAX HOT temperature level .Connecting compressors and meters to the model.
Simulate the vacuum process. Maintain the status for 5-10 minutes to check for leaks. Press the air vent at the yellow hose of the gauge set to release the remaining air inside the hose. Simulate the gas charging process from the high pressure side.
Simulate the gas charging process from the low pressure side. pressure value when system working normally. pressure value when leaking. Pressure value when the system lacks gas.
Pressure value when the system has poor cooling. Pressure value when the system having the broken compressor, the dryer is off. Pressure value when the system is blocked by the expansion valve. Circuit diagram of air mix servo motor.
Supply power to the air mixing motor. Circuit diagram of air inlet servo motor. Supply power to the air mixing motor. Supply power to the air vent mode control servo motor.
Circuit diagram of Solar Sensor. Evaporator temperature sensor. Circuit diagram of Evaporator temperature sensor and room temperature sensor. 113 6 List Of Tables Table.
Arduino Uno R3 Specification. Specification of 20x4 LCD Module. Saturation Pressure-Temperature Data for R134A. specification of DC-DC 3A LM2596.
Specification of Coolant Temperature Sensor. Sensor raw data vs Steinhart and Hart Equation. Specification of pressure sensor. Symbols and Meanings of Jack Pins.
Main parts of the model. The standard value measured between the pins. The meaning of the pins on the servo motor of each wind direction modes. 108 7 List Of Abbreviations LCD : Liquid Crystal Display HVAC : heating, ventilation, and air conditioning MPVs: Multi Passenger Vehicles ECU: Electronic Control Unit HI: High LO: Low MED: medium NTC: Negative temperature coefficient A/C: Air Conditioner TXV: Thermostatic expansion valve EATC: Electronic Automatic Temperature Control MH: Max Hot MC: Max Cool TAO: Temperature Air Outlet PWM: Pulse Width Modulation I2C: Inter-Integrated Circuit MIG: Metal Inert Gas REC: Recirculation mode FRS: Fresh air mode 8 Abstract As humans evolve and progress, their needs are continually advancing, and the use of cars is becoming more widespread.
The demand for comfort and safety features in vehicles is also on the rise. Modern car amenities, such as music systems, movie players, smart systems (like anti-theft locks, automatic headlights, smart rearview mirrors, etc.), and particularly the car's air conditioning system, are evolving and playing a crucial role in meeting these needs. Recognizing this trend, the Ho Chi Minh City University of Technology and Education has incorporated the study of automatic air conditioning systems into its curriculum. This includes comprehensive theoretical instruction and practical models that demonstrate the principles of operation and vehicle systems.
Leveraging this knowledge, the group has chosen to focus on the topic: "Research Air Conditioning System And Design Teaching Model" based on 1996 Lexus ES300. The primary objective is to conduct in-depth research on automatic air conditioning systems and to develop a complete model. The content expressed through 5 chapters: Chapter 1 : Introduction Chapter 2 : The Automatic Air Conditioning Control System Chapter 3 : Design And Build The Air Conditioning System Model Chapter 4 : Practical Exercises Applying The Model Chapter 5 : Conclusion Keyworks: Automatic Air Conditioning System, 1996 Lexus ES300 9 TABLE OF CONTENTS Acknowledgements. 2 List Of Figures.
3 List Of Tables. 7 List Of Abbreviations. 9 TABLE OF CONTENTS. Reason For Choose Topic.
Purpose, scope of research:. The scope of application. 15 Chapter 2: THE AUTOMATIC AIR CONDITIONING CONTROL SYSTEM. Introduction about Air Conditioning.
Overview of the air conditioning system. Overview of the automotive air conditioning system. Classification of air conditioning systems by zone [6]. Classification of air conditioning systems by control method.
Air distribution through the interior of the vehicle. The structure and operation principle of a car air conditioning system. The general structure of a car air conditioning system. The car air conditioning system operator.
Structure and operating principles of some main parts in the automatic air conditioning control system. Overview of the air conditioning system in cars. The automatic air conditioning system consists of several components. Air mix control servo motor.
Air inlet control servo motor. Air vent mode control servo motor. Control the outlet air temperature (TAO). Displays temperature and pressure at the condenser and evaporator.
Introduction to Arduino. Introduction to Arduino Uno R3. I2C Serial Interface 20x4 LCD Module. The temperature and pressure sensor.
65 Chapter 3: DESIGN AND BUILD THE AIR CONDITIONING SYSTEM MODEL. Autodesk Inventor Professional overview. Frame Design on Inventor Professional. Frame Construction and Part Search.
Searching for Replacement Parts in the Car Air Conditioning System. Cutting the gas pipe and Mounting the Model Parts on the Frame. Restoring the Electrical Circuit of the Model, Designing Electrical Panel with AutoCAD. Restoring the Electrical Circuit of the Model.
Designing Electrical Panel with AutoCAD. Completing the Electrical Construction of the Model. Electrical circuit diagram of air conditioning system. Completing the automatic air conditioning system model.
Instructions for using the model, operating the model, safety precautions during operation. 85 Chapter 4: PRACTICAL EXERCISES APPLYING THE MODEL. Practical exercise on gas charging for the air conditioning system using R314a refrigerant. Exercise to detect faults in air conditioning system using gas pressure gauge[2]98 4.
Exercise of measuring the voltage of the air conditioning system. Exercise of testing the operation of the motors on the model. Exercise of measuring the sensors. Exercise of checking the outside of the air conditioning system model.
Perform a outside inspection and diagnosis. The process of diagnosing system errors of the model. Reason For Choose Topic Through each stage of existence and development, human being needs are increasingly improving, cars are increasingly widely used. Users' requirements for comfort and safety features are also increasing.
Modern car amenities are increasingly developing, playing an important role in ensuring customers' needs such as listening to music, watching movies, and some smart systems (anti-theft locks, automatically headlights, smart rearview mirror,.) and one of the must-have amenities in a car is the car's air conditioning system. Ho Chi Minh City University of Technology and Education soon caught up with the trend, introduced the automotive air conditioning system into teaching based on in-depth theory and accompanied by a practical model, illustrating the principle of external operation and vehicle systems. Based on the knowledge learned, the group decided to choose the topic: " Research Air Conditioning System And Design Teaching Model" with the main purpose of further research on automatic air conditioning systems as well as create a complete model.