Refrigerating machines and installations; air deodorizing apparatus, namely, air exchanges for cleaning and purifying air; air cooling apparatus; desiccating apparatus, namely, desiccating units for producing dried fruits or air; gas scrubbing apparatus, namely, gas scrubbers; air purifying apparatus and machines; drying apparatus and installations, namely, drying apparatus for using in heating, ventilation system, air conditioning systems and refrigeration systems; air-conditioning ventilati...