Refrigerator
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The document describes a refrigerator repair task assigned to the author. When first inspecting the refrigerator, the author realized they lacked knowledge about how it worked. They researched refrigerator systems and components online but were unable to complete the repairs as many parts could not be separated. The author was able to clean the refrigerator and gained new understanding of how refrigerators function through the repair attempt. The document then provides details on the typical components of a refrigerator and explains the refrigeration cycle using 5 steps.
Refrigerator
- 1. Suchol Teiwcharoen 53211844 INC 2A On Thursday, January 5th Aj.Wuttichai assigned me to clean and repair a refrigerator. When I first saw inside the refrigerator. I thought I didnt have knowledge about it. Thus, I had to search the information about a refrigerator system and a component by internet, but I couldnt repair it. Because many devices couldnt be separated. So I only cleaned it up. After working I have obtained new knowledge. It is about a refrigerator working system. a refrigerator uses five major components : 1. Compressor 2. Heat-exchanging pipes (serpentine or coiled set of pipes outside the unit) 3. Expansion valve 4. Heat-exchanging pipes (serpentine or coiled set of pipes inside the unit) 5. Refrigerant (liquid that evaporates inside the refrigerator to create the cold temperatures)
- 2. The Refrigeration Cycle 1. The compressor compresses the ammonia gas. The compressed gas heats up as it is pressurized (orange). 2. The coils on the back of the refrigerator let the hot ammonia gas dissipate its heat. The ammonia gas condenses into ammonia liquid (dark blue) at high pressure. 3. The high-pressure ammonia liquid flows through the expansion valve. You can think of the expansion valve as a small hole. On one side of the hole is high-pressure ammonia liquid. On the other side of the hole is a low-pressure area (because the compressor is sucking gas out of that side). 4. The liquid ammonia immediately boils and vaporizes (light blue), its temperature dropping to -27 F. This makes the inside of the refrigerator cold. 5. The cold ammonia gas is sucked up by the compressor, and the cycle repeats.