How a Freezer Works: The Refrigeration Cycle, Frost & Freezer Burn, in 3D | tnt3D

Your freezer doesn't make cold: it pumps heat out of the box, using a refrigerant that boils below zero, an idea first demonstrated in 1755. In this episode of This and That 3D, In the Kitchen, we go from ice harvests and Frederic Tudor, the Ice King, to William Cullen, Jacob Perkins and Clarence Birdseye, CFCs and the Montreal Protocol, then follow the refrigerant in 3D through the evaporator, compressor and condenser, and see why quick freezing matters, why freezers frost over, and what freezer burn really is. ❄️ In this video: • Ice houses and Frederic Tudor, the Ice King • 1755: William Cullen's artificial cold • 1834: Jacob Perkins and the vapor-compression cycle • Clarence Birdseye and quick freezing, in 3D • CFCs, the ozone layer and the Montreal Protocol • The refrigeration loop: evaporator, compressor, condenser, in 3D • Ice crystals and food cells, in 3D • Frost, the defrost cycle and freezer burn, in 3D • Food safety and the Mpemba effect ⏱️ Chapters 0:00 Intro: it moves heat 0:23 Title 0:27 Winter ice, summer use 0:44 Frederic Tudor, the Ice King 1:08 1755: the first artificial cold 1:31 1834: the vapor-compression cycle 1:53 Gorrie & von Linde 2:12 Clarence Birdseye in Labrador 2:35 3D: The quick freezer 3:00 Early home fridges 3:23 CFCs and the ozone layer 3:47 1987: the Montreal Protocol 4:10 3D: The refrigeration loop 4:30 3D: The evaporator 4:48 3D: The compressor 5:00 3D: Condenser & expansion 5:20 3D: Ice crystals & food cells 5:43 3D: Why freezers frost over 6:05 3D: The defrost cycle 6:26 3D: Freezer burn 6:46 Freezing & bacteria 7:06 The Mpemba effect 7:28 By the numbers 7:46 A heat pump in a box 8:05 Thanks for watching 💬 What everyday thing should we slice open in 3D next? Tell us in the comments! 👍 If you enjoyed this, please like and subscribe. It really helps the channel grow. Narration: Kokoro TTS · 3D animation: Blender · Subtitles: English (CC) #TNT3D #Freezer #Refrigeration #KitchenScience #HowItWorks