A Cost-effective Cryotherapy Machine Using Cold Air Spraying
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Abstract
Cryotherapy can reduce pain in injured people. Cold air blasting is another alternative treatment because it can treat the injured area directly. However, currently, cold air blasters are expensive and must be imported from abroad. This research aims to design and create the cryotherapy machine by spraying cold air with cost-effective, using refrigerant R-404a, to compare the temperature and wind speed with the normal cryotherapy machine. The experiments are divided into 3 types: experiments in a temperature-controlled room at 20oC, 25oC, and 30oC with wind speeds of 5, 10, 15, and 20 m/s, respectively. The results of the experiments show that this research can produce temperatures of -7.5oC to -10.7oC, while general cold air blasters can produce temperatures of -10.3oC to -24.4oC. This information shows that this research cannot produce temperatures as low as general cold air blasters. Therefore, further study and development should be conducted.
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Copyright belongs to Srinakharinwirot University Engineering Journal
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