Humidifierproject CHITA

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION
FACULTY OF HIGH QUALITY TRAINING

REPORT

C.H.I.T.A
(Control Humidifier In The Air)

Name of Students

Student ID

Đỗ Hồng Quân

19161049

Vũ Đức Thoại

19161029

Nguyễn Phúc Tiến

19161030

Trần Lê Xuân Huy

19161031

Ho Chi Minh City, 6th, January, 2021

HO CHI MINH CITY UNIVERSITY OF TECHNOLOGY AND EDUCATION
FACULTY OF HIGH QUALITY TRAINING

REPORT

C.H.I.T.A
(Control Humidifier In The Air)

Name of Students

Student ID

Đỗ Hồng Quân

19161049

Vũ Đức Thoại

19161029

Nguyễn Phúc Tiến

19161030

Trần Lê Xuân Huy

19161031

Ho Chi Minh City, 6th, January, 2021

Ho Chi Minh City, January 6th, 2021

RESEARCH PROJECT ASSIGNMENT
Student name:

Student ID:

Student name:

Student ID:

Student name:

Student ID:

Student name:

Student ID:

Major: Electrical and Electronic

Class:

Telecommunication Engineering
Advisor: Nguyen Thoi

Phone number:

Date of assignment:

Date of submission:

1. Project title:
2. Initial materials provided by the advisor:
3. Content of the project:
4. Final product:
CHAIR OF THE PROGRAM
(Sign with full name)

ADVISOR
(Sign with full name)


Ho Chi Minh City, January 6th, 2021
PROJECT EVALUATION SHEET
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Student ID:.......................................................................................................
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Major:...............................................................................................................
Project title: ....................................................................................................
Advisor: ..........................................................................................................
EVALUATION
1.Content of the project:
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2. Strengths:
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3. Weaknesses:
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4. Approval for Tech Show? (Approved or denied)
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5. Overall evaluation: (Excellent, Good, Fair, Poor)
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6. Mark:...............(in words............................................)
Ho Chi Minh City, January 6th, 2021
ADVISOR
(Sign with full name)

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DISCLAIMER
The information of this project is the opinion or opinion in the article
that is of individual group, not influenced or controlled by any company,
organization or sponsor.
The author always tries to provide accurate and truthful information
to the best of his knowledge.
Over time, technology may change so the content of the article may
no longer be accurate.
One very important thing that people often ignore, is that the product
is only maximized when in enclosed spaces. So if the above condition is
not met, the user should accept certain risks if any.
When reading the content in C.H.I.T.A, it means that you have
accepted the terms of the author mentioned above.
COPY RIGHT
These articles and content are the copyrights of IRONTEAM (except
articles with reference). The author does not agree to arbitrarily take the
content of the article to publish or republish on another website. If you
really want to republish any posts, please quote
The author used images found on the internet. If any images are
copyrighted, the author will always respect.

ACKNOWLEDGEMENTS

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A completed study would not be done without any assistance.
Therefore, the author who conducted this research gratefully gives
acknowledgement to their support and motivation during the time of
doing this research as a requirement of completing my C.H.I.T.A project.
First of all, I would like to express my endless thanks and gratefulness to
my supervisor Dr. Nguyễn Thới. His kindly support and continuous
advices went through the process of completion of my thesis. His
encouragement and comments had significantly enriched and improved
my work. Without his motivation and instructions, the thesis would have
been impossible to be done effectively. As a part of project:
EXPERIMENT RESULTS AND ANALYSIS, my thesis has been done
by contribution of all relevant students. So far, I would like to thanks to
peoples who took charge in the process of data collection and data entry
for doing this research as a part of the project. I also acknowledge my
thankfulness to all respondents and managements’ branches of AIM
program where data would be collected for their valuable time, kind
assistances and support in participating in the surveys. I would like to
state my thanks to Ho Chi Minh University Of Technology And
Education where supported for the project and provided me lab to
pursuing and completing my degree.
My special thanks approve to my parents for their endless love, care and
have most assistances and motivation me for the whole of my life. I also
would like to explain my thanks to my siblings, brothers and sisters for
their support and care me all the time.
As last, my deeply thanks come to all my friends during time I study in
Việt Nam . Their kindly help, care, motivation gave me strength and lift
me up all the trouble for the rest of my life.

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TABLE OF CONTENTS
DISCLAIMER..........................................................................................1
ACKNOWLEDGEMENTS.....................................................................2
TABLE OF CONTENTS.........................................................................3
LIST OF FIGURES..................................................................................4
LIST OF TABLES....................................................................................5
LIST OF ABBREVIATION.....................................................................6
ABSTRACT..............................................................................................7
CHAPTER 1. INTRODUCTION............................................................8
I. PROBLEM STATEMENT.............................................................8
II. CASE STUDY AND CONSTRAINTS.........................................8
III. DESCRIPTION OF THE PROJECT........................................9
IV. RESEARCH METHODOLOGY................................................9
V. BRIEF CONTENT.........................................................................9
VI. METHODOLOGY.....................................................................10
CHAPTER 2. LITERATURE REVIEW..............................................17
2.1. Background..................................................................................17
2.2. Research and review of an existing system (device)...................24
CHAPTER 3. DESIGN AND IMPLEMENTATION..........................27
3.1. Block Diagram............................................................................27
3.2. Operation Description.................................................................28
3.3. Electrical Design.........................................................................28
3.4. Control Design............................................................................38
CHAPTER 4. EXPERIMENT RESULTS AND ANALYSIS..............43
4.1 . Design Experiments....................................................................43
4.2. Operation Experiments................................................................47

4.3. Conclusion...................................................................................51
CHAPTER 5. CONCLUSION AND RECOMMENDATIONS.........52
5.1. Conclusion...................................................................................52
5.2. Recommendations.......................................................................52
REFERENCES.......................................................................................53

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LIST OF FIGURES
Content

Page

Fig 1.1 The current principle creates sound waves

22

Fig 1.2 Describes how sound waves separate water

23

Fig 1.3 Overview diagram of the steam generator

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LIST OF TABLES

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Content

Page

Time progress table

11,12,13

Cost Management table

14

Risk management table

15,16

Needs table

43

Metrics table

44

List of indirect metrics table

44

Direct dimension and Indirect dimension

45

General specifications for the product

46

Experiment method

47

Table of static test criteria

49

Synthesize Result

50

Power consumption test data

51

LIST OF ABBREVIATION
No.

Full word

Abbreviation

1

Artificial intelligence

AI

2

Polyamide

PA

3

Control Humidity In The Air

C.H.I.T.A

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ABSTRACT
CHITA is a complete system consisting of a main humidity controller
(Control Humidity In The Air) combined with AI (Artificial Intelligence)

control and many other sensors, ... The main function of CHITA is to
control the humidity of the air in an enclosed environment, with its
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sensors CHITA's central control system is AI that will control almost
everything in the air and give appropriate advice to people. use.
Unlike air conditioners that compress the air temperature downwards,
C.H.I.T.A uses water in liquid form and sprayed in steam form to lower
the ambient temperature. Temperature and humidity are two important
factors that directly affect human life. However, since the inception of the
air conditioner, the humidity factor is not considered important and there
is almost no cooling system that uses moisture as the main thing for
cooling. With C.H.I.T.A, the humidity is precisely adjusted between 10%
and 80%. Cooled by humidity completely different from conventional air
conditioner, C.H.I.T.A brings comfort and safety to users. With air
conditioners, the temperature is lowered very quickly and it makes users
susceptible to colds (especially children) as well as lowering the air
temperature for a long time makes users prone to dry skin.
C.H.I.T.A is still an intelligent system with the main ability to
control humidity, but depending on the purpose of the user, the system
may be integrated with more suitable functions. With many outstanding
advantages compared to air conditioners, along with the necessary criteria
of a modern system (the most important one is environmental protection),
C.H.I.T.A will definitely replace traditional air-conditioning in the near
future.
CHAPTER 1
INTRODUCTION

I. PROBLEM STATEMENT
The main topic of this project is about a humidifier system and our
improvement for the device to be suitable in the environment and
condition of the house. Humidifier is a device that creates water vapor in

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the air that increases the air humidity and reduces the ambient
temperature. Nowadays it becomes the device that create mist in the
fashion and film industries. Create better effects in movies.
The smart humidifier has been designed and implemented with some
advanced features as follows:
An auto mode to help save energy with two levels of humidifier: turn
on when under the standard humidity and turn off when it over the limit.
+AI help control
+More function
+Safety and environmentally friendly
II. CASE STUDY AND CONSTRAINTS
Vietnam is located in the humid monsoon tropical climate, together
with urbanization and climate change, the average temperature
(especially in urban areas) is increasing. But the frequent use of air
conditioners increases the greenhouse effect as well as consumes a lot of
electricity. Therefore, finding a more optimal solution to replace the
traditional refrigeration is a pressing problem today. In addition to using
the usual cooling principle of an air conditioner, there is another way that
is to adjust the amount of water vapor in the air. That is also the main
purpose of this project.

III. DESCRIPTION OF THE PROJECT
The purpose of this project was to focus on steam cooling. Since then,
it shows the superiority of the system compared to other types of airconditioning. Towards safe cooling for people and environmental
protection, creating the most favorable environment for people to live.
IV. RESEARCH METHODOLOGY

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Scientific research methodology
The method of data collection
Experimental method
Analysis and synthesis method suitable theory
V. BRIEF CONTENT
The following are 6 sections that we will summarize in each project
implementation process:
- Section 1 is introduces the existing humidifier on the market, how we
will develop the humidifier. It is also a brief description of the
humidifier system in this report.
- Section 2 is an assessment of the health effects of moisture on human
health from reliable sources, where the steam generator came from,
and its development in the past and present. A brief introduction to the
system studied in this report is also presented.
- Section 3 is details electronic and mechanical designs, how to choose
the right materials and why. Detailed calculation of the space that the
product operates and the features that the product brings.
- Section 4 is the detail of result of experiment, testing, programming
and troubleshooting.

- Section 5 is the evaluation, conclusion and recommendation based on
the task work with emphases on the project design and operation. It is
also compared with initial goals of the project.
- Section 6 is the ethics of the project.
VI. METHODOLOGY
1. Objective:

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The goal of this project is to design and manufacture an intelligent
humidifier. It possesses the following features and characteristics:
+ Controlled by AI
+ Add moisture absorption feature
+ Natural cooling
+ Save electricity
+ Environmental protection
+ Many new features for each customer
Since then, the scope of this project is limited to research and
implementation. This article shows the research and development of an
affordable SMART humidifier suitable for use in buildings with the main
goal of making it easy, comfortable and safe for everyone to use.
2. Project Management:
Project management is defined as applying specific processes and
principles to accomplish achieve specific goals. It helps team to observe
and control the whole process effectively, enable to solve the problems
rapidly. In this project, there are 5 keys components team will focus are:
scope, time, cost, quality, and risk.

2.1 Scope Management:
Project scope is a part of project planning that is the key to control
project management success. It is what innovations or changes will be
delivered and the goals from the project in chapter Introduction. The
requirements of the project are:


Easy to use, friendly-used human interface



Working

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

Convenient and easy to approach



Limit the cost

After the requirements the goals are considered, the scopes are defined
following:


Build cheap SMART air purifier



Using app in IOS and Android to control the air purifier



Concept meets the requirement about standard of indoor quality.
2.2 Time Management:
Time management is defined as organizing or planning how long you

spend your time in specific activities. It is the main key of this project.
Because effective time management permits me to distribute specific time
slots to activities as per their importance. It also affects cost and quality.
In this project, each stage is planned by specific time. Begin with agree
title and brief, then do the literature survey and find the solutions,
materials selections, implementation, write report and presentation.
Table 1: Time progress table
STAGE

Activities

Start

End

29/11/2020

2/12/2020

2/12/2020

2/12/2020

3/12/2020

4/12/2020

Market research

4/12/2020

4/12/2020

Complete swot

4/12/2020

5/12/2020

Basic
knowledge
research
Determine
UP CONCEPT

feasibility
Material
planning needed

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Buy materials

5/12/2020

6/12/2020

6/12/2020

7/12/2020

7/12/2020

10/12/2020

10/12/2020

12/12/2020

13/12/2020

15/12/2020

15/12/2020

15/12/2020

16/12/2020

19/12/2020

Complete essay

20/12/2020

21/12/2020

Decorate

21/12/2020

22/12/2020

Proceed to
PROCEED 1

report
Assemble
electrical
components
Testing the
system
Find and test the
code
Combine code

PROCEED 2

with the system
Complete the
whole system
and complete
the content of
the essay

FINISH

Team Members’ Responsibility:

Đỗ Hồng Quân (leader):
-Purchase materials.
-Design product
-Conducting surveys.
-Prepare presentation slides.
Vũ Đức Thoại:
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-Coding ARDUINO for the product.
-Purchase materials.
-Design circuit board.
-Circuit installation
Nguyễn Phúc Tiến:

-Assembling product.
-Purchase materials.
-Assembling product.
-Circuit installation
Trần Lê Xuân Huy:
-Prepare presentation slides.
-Purchase materials.
-Conducting surveys.
3.2.3 Cost Management:
Cost management requires the project must be accomplished on time
and accepted budget. We can do some activities like evaluating,
budgeting, financing, funding, etc. to improve the cost. Components and
materials need to be defined to manage.
Table 2: Cost Management table
Item

Quantity

Unit Price

Supplier

1

127.500 VND

Available

Fan 5x5 cm

1

21.500 VND

Available

Module Relay 5VDC

1

25.000 VND

Available

Mist generator

1

80.000 VND

Available

Screen LCD 16x2 cm

1

40.000 VND

Available

ESP-WROOM-32
ESP32 Development Board

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Mini usb cable

6

48.000 VND

Available

1

300.000 VND

Available

Box

1

20.000 VND

Available

Bottle

2

50.000 VND

Available

Taidacent SHT30 Moisture Sensors
3.3v Outdoor Plant Humdity Sensor
Probe Wate

Total costs

712.000₫

3.2.4 Quality Management:
Quality of a product can be measured in terms of performance,
reliability and durability. Quality management ensures that product is
consistent. In this project, quality management includes planning,
scoping, monitoring and controlling all the aspects of prototype. The
components and materials selection along with cost and quality
effectiveness are controlled by testing and selling from reputation store.
3.2.5 Risk Management:
Risk Management is one of the important parts in the project, there
isn’t any perfect project that success without any problem. With the Risk
Management Plan, we can decrease the chance of the failure happen and
have the right action for each problem. In the other hand, the plan also
helps reduce level of uncertainty and focus on High – Level Risk.

Table 3: Risk management table.

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ID

Description of Risk Impact

Risk Responses

Risk
Level

1

2

3

4

Price of the material Cost over budget

Find cheaper material

is higher than

sources but the quality

expected.

will decrease.

Error in the

Time Consuming

Find the faster ways or

manufacturing.

change the design.

Circuit has problem. The function is not

Check the circuit and

The product did not

stable.

fixing the circuit.

Time Consuming

Check and control with

meet the

Medium

High

High

High

required to repair.

requirements in the
test.
5

The product has

Prototype Quality

small errors.

Check and correct if
enough time.

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Low

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CHAPTER 2
LITERATURE REVIEW
2.1. Background
2.1.1. Air humidity

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Air humidity is the term referring to the level of water vapor present in
the air. Some other in-depth concepts related to air humidity include:
 Absolute air humidity: is the amount of water vapor contained
within a unit volume of air.
 Relative air humidity: is a quantity commonly used in everyday
life, only the percentage of water vapor in the air. When the relative
humidity reaches 100%, it means that the air is saturated in terms of
water vapor content.
 Humidity ratioIndicates: the humidity level varies with different
temperature levels.
Measuring indicators related to air humidity play many important roles
in many different areas of life such as agriculture, forestry and fishery,
health, mobility, …
The earth's surface is covered by more than 70% of water coming from
oceans, rivers, streams, and lakes. Under the influence of wind and
sunlight, this water can evaporate and be released into the air. The higher
the temperature, the faster the water molecules move and the chaos
causes more water vapor to be released into the air. This is the main

mechanism of the formation of moisture in the air. Air humidity is
influenced by ambient temperature, pressure and wind. When the air
temperature rises high in the summer months, the humidity in the air falls
low.
In contrast, during winter months, the air humidity increases highly and
saturation can be reached. Thus, temperature and humidity are two
quantities that have an intimate relationship with each other. Humans
apply this by adjusting the temperature if they want to change and
controlling the humidity at the right level.
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The air humidity is said to be high when it exceeds 70%. The air
humidity rises too high to saturation level is the cause of many diseases,
adversely affecting the health of people, especially children and people
with weakened immune systems. Disadvantages caused by too high air
humidity:
 Causes mold, destroying clothing and household items
 Making medical equipment difficult to maintain
 Condensate to walls and floors, surfaces become slippery and easy
to fall

 Bacteria, molds and other microorganisms have conditions for
growth. They are allergens for respiratory diseases such as
pneumonia, bronchitis, bronchial asthma, chronic obstructive
pulmonary disease and a number of other skin conditions.
2.1.2. Effect of temperature
When the air is colder it will not be able to handle as much moisture as

it does with warmer air. Temperature is very important in relation to
humidity, especially when people spend more than 90% of their time
indoors.
Weather: Humidity is lower in colder climates than in warm climates.
Because cold air will hold less moisture than warm air. Therefore, in
winter, the humidity is usually lower. Meanwhile, in summer, the
temperature will be higher, because when the temperature is high, the air
will contain more water vapor.
Take it every day: Small daily chores can affect humidity levels.
Cooking, cleaning, washing dishes, breathing, washing clothes,

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showering and other indoor processes release moisture into the indoor air,
causing indoor humidity to rise.
Maintain moisture at a suitable level:
It is very important to maintain the right humidity for the home. Poor
humidity can affect the health of you and everyone in the house. When
too much moisture can cause humidity and mildew; if too little, the air
becomes dry and uncomfortable.
 High Humidity
Mold
21% of the 21.8 million asthma cases each year are caused by wetness
and mold in the neighborhood. Wet conditions provide a great home for
bacteria, as well as mold growth. Excess humidity in buildings can be
caused by leaks, rainwater seeping through windows and basements; or
even moisture rising from the ground floor.

Asthma, allergies and respiratory diseases
A humidity above 50% is recommended when the air becomes thick
and humid. More problems can develop as levels increase.
Dust mites
Did you know that dust mites cannot survive without moisture from the
air? Dust mites like moderate temperatures and high humidity because
they absorb water from there, so areas with high humidity are great places
for them to live. Microorganisms can aggravate allergies and asthma, so
maintaining the right humidity is key to minimizing them and their
effects.
 Low humidity
Dry skin and eczema
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Itching and dryness can be caused by low humidity. Studies have also
found that low humidity should be avoided in order to protect the tear
film into your eyes. It can also worsen certain skin conditions like
eczema. Too dry air can absorb moisture from your skin and make
eczema worse.
Education
Measurable changes in your ability to focus or do things; can be caused
by small changes in relative humidity and temperature.
Flu
Scientists have found a significant link between low humidity and the
easy spread of flu viruses. One study shows that during peak times of
absolute humidity is low; for example, in winter when the air is dry, the
spread of flu increases.

2.1.3. Based on existing technology
The first air conditioner was born in 1914 by the American engineer
Willis Havilland Carrier. The machine has the ability to regulate the
temperature and create humidity, but not the ability to regulate the exact
humidity.
Today air conditioners have been improved and are much more
compact, but the humidity control function is still not mainly, the
humidity is just an extra feature. Air-conditioners create moisture by
condensing water vapor in the air and returning it to the environment.
Recently, moisture is generated by the ultrasonic principle. If we
supply it with the same voltage but opposite alternating cycles, the
material will scale according to the frequency of the supply.

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