The-Science-of-Portable-Air-Conditioners.pptx

a review for portable AC for bussiness purpouse

1. The Science of Portable Air Conditioners Explore how portable AC units work, their key features, and the differences between single and dual-hose systems.

2. How a Portable AC Works Portable air conditioners operate on a simple yet effective cooling cycle. They draw in warm room air, cool it, and then expel the heat outside. Air Intake & Filtration Warm room air is drawn in and filtered to remove particles. Cooling Process Air passes over evaporator coils, where refrigerant absorbs heat. Heat Release Heated refrigerant flows to condenser coils, releasing heat to the outside. Cooled Air Return Cooled air is blown back into the room, lowering the temperature.

3. System component layout

4. Single-Hose vs. Dual-Hose Systems Single-Hose Units Compact and easier to install. Single hose for both intake and exhaust. Creates negative pressure, drawing warm air from outside, reducing efficiency. Best for smaller spaces with less cooling demand. Dual-Hose Units Two separate hoses: one for intake, one for exhaust. Draws outside air to cool the unit, expels warm room air. No negative pressure, leading to more efficient cooling. Ideal for larger spaces and hotter environments.

5. Key Features for Enhanced Comfort Portable ACs offer various features for convenience, efficiency, and usability. Adjustable Thermostat Set and maintain a specific desired room temperature. Multiple Cooling Speeds Choose between quiet operation or rapid cooling. Dehumidifier Function Reduces humidity for a more comfortable environment. Programmable Timer Schedule on/off times for convenience and energy saving. Air Filtration System Improves indoor air quality by trapping particles.

6. Portable AC Model Comparison: Features & Protections A detailed comparison of various portable air conditioner models, highlighting their diverse features, internal components, and safety protections. all the following models use capillary tube as an expansion device. Manufacturer Company Model Feature Set Protections Component Control Method Temperature Range Refrigerant Widetech PAC‑10000DB Cooling, Dehumidification, Fan; 1–12 hr timer; washable filter; full‑tank lamp Startup delay, antifreeze (coil sensor), overload protector, fuse, full‑tank float cutout Rotary hermetic compressor, fan motor, capacitors, thermistors (ambient & evaporator), float switch, PCB & relays Panel keys (Power, Function, Fan, Timer), indicator lamps 16–32 °C R22/R410A (varies by year) Carrier PD Series ( R290) Cool, Dry, Fan‑only, Heating (electric/heat pump); multi‑speed fan; sleep; timer; auto restart; remote; auto defrost Compressor delay, antifreeze, overcurrent, sensor fault, overheating; electronic protection logic R290 compressor, dual centrifugal fans, PCB, thermistors (ambient/coil/condenser), float/drain assembly Digital panel, LED display, remote ~16–32 °C R290 Friedrich P09B‑A / P12B‑A Cooling 9–12k BTU; Dehumidify; Fan; Timer; remote Compressor overload, float switch, sensor failure codes (E1/E2) Rotary compressor; evap, condenser & slinger fan motors; capacitors (8/9 µF); thermistors; float + micro switch; PCB Control panel + remote Adjustable setpoint R410A (20–23.7 oz) 823‑007V80 / V81 Cooling, Heating, Dry, Vent; LED panel; timer; sleep; auto restart; auto defrost; remote Auto tank shut‑off; refrigerant safety; electronic safeguards Compressor, fan motors, PCB, thermistors, float switch Panel + remote Adjustable digital thermostat R290 LG LP0814WNR Cooling (8k BTU), Dry, Fan; 2 speeds; 24h timer; remote; filter reminder; casters Plug breaker (GFCI); compressor delay; frost protection; float cutout Compressor, indoor fan, thermistors, PCB, float switch, washable filter Panel + IR remote Digital setpoint (Not stated) MeacoCool 7–10K Cooling (7–10k BTU), Dry, Fan; timer; remote; washable filter Compressor delay; antifreeze; tank full stop; R290 flammable safety Rotary compressor; fan; thermistors; PCB; water sensor Digital panel + remote 16–32 °C R290 (140–260 g) MeacoCool 12–16K Cooling (12–16k BTU), Dry, Fan; timer; remote; washable filter Leak/fire (R290) protections; antifreeze; compressor protection Rotary compressor; PCB; blower; thermistors; float switch Panel + remote 16–32 °C R290 (240–270 g) Widetech Narciso 12 Dehumidification; humidity switch; washable filter; float/tank protection Overload protector; fuses; antifreeze Rotary compressor; humidity switch; thermistors; float; PCB Humidity dial + PCB >5 °C; frost stop at low temp R134a Sharp CV‑P09LX / CV‑P10LC Cooling (9–9.5k BTU); Dry; Fan; Auto; Mega Cool; Plasmacluster ion; remote + louver control Overload relay; thermal fuses in fan motors; frost/low‑temp sensors Rotary compressor; indoor/outdoor centrifugal fans; capacitors (60 µF run, 6/8 µF fan); thermistors (TH1–TH3); drain pump; louver motor; Plasmacluster unit; PCB Digital panel + remote 16–32 °C R22 (12.5 oz)

7. System Block diagram : PD Series (Carrier, R290)

8. Detailed Block Diagram

9. System Block Diagram: User Interface Component Input Output User Interface Control Panel Button press (Digital) Command signal (Digital) → PCB Remote Control Button press (Digital) IR signal (Digital) → PCB LED Display Error code (Digital) from PCB Visual error code (E1-E4, EC, P1)

10. System Block Diagram: Sensors Sensors T1 (Room Temp) Ambient temperature (Analog) Resistance signal (2–62kΩ Analog) → PCB T2 (Evaporator Temp) Evaporator temperature (Analog) Resistance signal (Analog) → PCB T3 (Condenser Temp) Condenser temperature (Analog) Resistance signal (Analog) → PCB Water Level Sensor Water level (Analog) Switch signal (Digital) → PCB (triggers P1)

11. System Block Diagram: Control & Actuation Control System PCB/CPU Digital/Analog signals PWM/Relay signals, Error codes Protection Logic Sensor data + Timer Safety lockouts Actuation System Compressor Relay signal (Digital) Mechanical action (R290 compression) Fans PWM signal (Digital) Variable-speed airflow

12. System Block Diagram: Safety Systems Safety System Overcurrent Protection Current surge (Analog) Compressor cut-off (Digital) Refrigerant Leak Detect Refrigerant pressure (Analog) EC error code (Digital → PCB → LED) Drain Blockage Detect Water backup (Analog) P1 error (Digital → PCB → LED)

13. Thanks for Your Attention! We hope this presentation provided valuable insights into the intricacies of portable air conditioner systems. Presented by: Nada Abdelsattar, Energy Resources and Mechanical Power Engineer, University: EJUST, Mail: [email protected]