TITLE OF THE INVENTION: IOT ENABLED NON-TUMBLE CLOTH DRYER
FIELD OF THE INVENTION
This invention relates to the drying of different fabrics simultaneously with the help of a user-friendly Android Application (App).
BACKGROUND OF THE INVENTION
Drying of clothes is a severe and persistent problem. The use of clothes dryer has become trivial in a household, especially in humid days wherein it takes a lot of time for clothes to get completely dry. For effective drying, it is necessary to decrease the load in the drum-type washing machine or to dry in two steps. Therefore there is a need for clothes dryer.
As the commercial clothes dryer is working on a tumble drying method, it causes a lot of twisting of the clothes which leads to the reduced life span of the clothes, bleeding of color from colored clothes to white or light shade clothes, the formation of wrinkle & lint.
Also, the majority of the clothes dryer is motor driven and needs human supervision and there is no such clothes dryer which can be remotely controlled.
Hence, there is a need for IoT enabled cloth dryer.
SUMMARY OF THE INVENTION
The multipurpose dryer is made up of Galvanized Plain Steel 26 gauge. Galvanized plain steel has properties that are well suited for this work, such as corrosion resistance (100 times better than steel), resistance to cracking, durability, high storing capacity, and high-temperature

coefficient. The overall dimensions of the dryer are: length 605 mm, width 300 mm, height 900 mm.
The blower is mounted on the back panel of the dryer to provide the hot air inside the chambers. The dryer has multi-chamber support for the simultaneous drying of different fabrics and other utility items. Each chamber has seven DHT 22 sensors.
The dryer has an ESP32 microcontroller board which can host webserver and web socket server and has a WiFi for interfacing with the network (refer fig I).

Dryer interacts with a mobile android application for providing remote control features.This android application has a user-friendly UI interface with various interactive features. UI includes two major screens: 1: Main Screen Feature rangeincludes:
Chamber selection, Cloth type selection (like Cotton, Silk, Wool, Others, etc.), Temperature &Humidity slider to set the cut-off values,
Live chamber readings (Temperature and Humidity), Temperature &Humidity Cut Off Indicator, Time slider, Start/Stop button, Message block, Interactive Real-Time Graphs (refer fig 2).
2: Sensor UI: It is a detailed sensor screen.lt incorporates the details about the real-time temperature and humidity information of individual sensors. This is helpful in temperature and humidity data analysis and evaluation. This has two major features
: Real-Time Graphs of each sensor
: Device Health Report:This report covers the Ageing and Temperature/Humidity variation values of individual sensors which show the device heath aspect(refer fig 3).
Voice Command integration (Main Screen) feature is provided for setting the Temperature & Humidity cut off values both on user interface elements and in a real-time graph. The timer is also voice-controlled (refer to fig 4).
Text to speech feature is also incorporated for various user interface element interaction/operations.

BRIEF DESCRIPTION OF THE DRAWING
Figure 1 represents the interface and how all components in the said dryer are connected and working.
Figure 2 UI layout of the main screen
Figure 3 illustrates the fiinctioning of the sensor UI screen.
Figure 4shows the Voice Command integration element
Figure 5 shows the DHT 22 Sensor
Figure 6shows a high-level diagram.
Figure 7shows the mechanism of Blowershutdown
Figure 8 represents a Real-Time Interactive graph
Figure 9 shows the Sensor UI Screen Layout

Figure 10 shows a CAD model of the dryer
Figure 11 is showing the cut-off indicator and the message that comes when values are reached.
Figure 12 shows a detailed description of the functioning of the Main Screen. It shows how the drying process works with the help of developed UI (main screen).
DETAILED DESCRIPTION OF THE INVENTION
The advancement of the existing remotely controlled dryer is based on the ESP 32 devkit, where temperature & humidity readings are continuously monitored inside each chamber using DHT 22 sensors. The DHT 22 sensor (refer fig 5) has a temperature range of -40°C to 80°C and a humidity range of 0% to 100%.DHT 22 sensor output is monitored continuously on the UI screen. ESP 32 has 18 Analog to Digitalconverter pins (ADC) and 5V (Vin) that are required to connect multiple DHT 22 sensors and 5 V relay, respectively. ESP 32 devkit consists of both the on-chip WIFI module and the Bluetooth module which are essential for embedded IoT applications.

As illustratedin figure 1, ESP 32 acts as an IoT hub. DHT 22 sensors inside each chamber of the dryer are connected to ADC pins of ESP 32. A 5V relay is also connected to one of the GPIO pins of ESP 32. AC driven hot air blower is connected to ESP 32 via 5V relay switch (for On /Off).
As illustrated in fig 6, readings of temperature & humidity of the selected chamber will be shown on the UI main screen. Cut off values for temperature and humidity for particular cloth type will be set based on fixed values which can be further set/changedusing either slider or voice recognition command. When the cut off value of either temperature or humidity crosses the live(real-time)readings on the UI screen, then UI sends a shutdown HTTP server call to ESP 32 which in turn sends a further signalto 5V relay for blower shut-down (ref fig 7). The shutdown is shown as green to red color change in the UI indicator element (humidity/temperature). Corresponding informative messages appear on the message block UI (ref fig 11).

An interactive real-time graph (Temperature vs Humidity) is also displayed during the drying process. A cut off indicator (red color circular dot) (ref fig8) shows the set value in this graph.This indicator can also be set through voice command.Dryer shuts down when the live readingtouches the cut off indicator on the real-time graph. This covers the main screen UI elements.
Figure 8: Interactive Real-Time Graph
Dryer hardware has seven DHT 22 sensors inside each chamber(refer fig9Sensor Topology).
Each panel i.e. Left,Back and Right has two sensors one at top and other at the bottom respectively. A sensor(top) is located in the middle of the ceiling which plays a major role in the decision making of dryer shutdown. The reading of the top sensor will be used for the main decision making, as the maximum temperature will be found at the top(hot air rises above).
The Sensor UI screen shows a detailed description of individual sensors. Detailed sensor touch UI is provided which updates real-time graphs on selection. The exact position of each sensor is replicated in the UI(i.e. top, left panel, back panel, right panel). This exact design of the sensor position on the screen enhances UI usability experience.
The sensor UI screen has adevice health report section. It keeps the data of the age of the sensor and variation in temperature & humidity reading. The age of the sensor is calculated by

subtracting the current date with the date of manufacturing. This is a similar metric as we use for the age of human beings. This maintenance-friendly metrics can be used for old sensor replacement (as per manufacturer guidelines). Also, the wear and tear can be calculated from the temperature variation data (ref fig 9).
Figure 9: Sensor UI Screen layout
Text to speech command is a desirable feature that is incorporated in the UI design
implementation. Welcome message, Reading the messages in message block, Chamber Selection, setting up temperature and humidity, Selecting Sensor UI button, Selecting individual
sensors all are supported by said feature.

Claims:
We claim that the dryer is:
1. The multipurpose dryer is made up of Galvanized Plain Steel 26 gauge.The overall dimensions of the dryer are: length 605 mm, width 300 mm, height 900 mm. The dryer contains:

Twochambers each of length 300 mm, width 275 mm, and height 845mm. Each chamber includes a hanger rod about 70 mm below from the top ceiling; (fig 10); A hot air blower is used to provide hot air inside each chamber for the drying process, and each chamber has seven DHT 22 sensors for having effective values of temperature and humidity;
2. Two separate chambers referenced in claim 1 are provided for the simultaneous drying of
different fabrics and other utility items like vegetables, spices, agricultural products, etc.
3. Remotely controlled app: Dryer is being controlled remotely through an android application with a well-designed and interactive UI.
4. It supports Text to Speech command feature herein Welcome message, Reading the messages in message block, Chamber Selection, setting up temperature and humidity, Selecting Sensor UI button, Selecting individual sensors.
5. Device Health Status: This section deals with device health status parameters. There is a separate UI for showing these parameters.
Parameters Include:
1: Sensor Aging: This parameter calculates the age of the sensors. Age — (Current Date - Date of Manufacturing)
2: Variation in Temperature/Humidity: Temperature Variation Metrics = (Highest Temperature- Lowest Temperature) Humidity Variation Metrics = (Highest Humidity - Lowest Humidity) Based on these maintenance-related decisions can be taken. If the sensor fails the graph is empty and the user can call the maintenance person related to the issue. This design favors easy maintainability. Based on highest temperature & highest humidity dryer configuration can be done automatically.
6. Sensor UI: This is a separate user interface for observing the internal (individual) sensor
details which would be helpful in the supervision and maintenance of the
device.Individual sensors can be selected for the details.
Details Include:
1: Real-Time Graph showing the temperature and humidity.
2: Device Health Report

7. Sensor topology selected for better analysis of data required in the shutdown decision making. The chamber as claimed in claim 1 has seven DHT 22 sensors. Each of the chamber side panels (left and right both) has two sensors, one at the bottom and one at top. The back panel has 2 sensors (top to bottom) for proper data capturing. Also, there is one sensor at the top of each chamber called an alert sensor. Hot air tends to move upwards, therefore a top sensor called alert sensor is used to capture & make decisions based on this sensitive data (temperature & humidity).
8. Real-time graphs are also provided for individual sensors inside the dryer.These can be seen on the Sensor UI screen.
These graphs capture the real-time sensor data for different parameters. Main Screen: It has a real-time graph between temperature and humidity. Sensor UI screen: It has separate graphs for Temperature and Humidity. Color coding is used to depict information (refer to fig 8).
9. Voice commands integration: This feature deals with the speech recognition of some
specific commands. Limited support is used in the application.
Main Screen: Setting the temperature, humidity,and cutoff values through speech commands.
10. Setting the cut-off Values graph integration system: This claim deals with setting the cutoff value for humidity and temperature through manual or speech commands and its
real-time reflection on the graph (Temperature vs Humidity). This is a dynamic approach
wherein a user can set the humidity and temperature cutoff and the same would be
immediately shown on the graph in the form of a small radius circle (red filled color).