Diseño y construcción de un equipo refrigerador de leche por inmersión del evaporador para la familia Rodríguez Sánchez en el cantón Gualaquiza.
In the present report are detailed the stages in those that was developed the design and construction of the team refrigerator of milk by immersion of the evaporator for the Rodriguez Sanchez family, in the Gualaquiza city, with the purpose of improving the quality of the product.
The insulating selected for the isothermic tank is the polyurethane foam applied by the technique of having strained, with a thickness of 5 cm, the operation and thermal isolation tests they were carried out according to the norm CPE INEN 007, that which allowed to qualify to the team like acceptable. 
The global coefficient of transfer of heat for the design of the evaporator is 75 W/m2K. The time required by the team to reduce the temperature from 35 oC to 2 oC is 1.76 hours, the real power consumed by the team is 809.6 W, what represents a cost of monthly operation is 3.33 USD.
The indicators of the hypothesis show a reduction of 75% of bacterial load in the content refrigerated when arriving to the storing center, in comparison of the content of milk without refrigerating.
The document also contains recommendations for the design, construction, operation and maintenance of the team; besides it is recommended the construction of a second isothermic tank, to carry out a trip every two days for reasons of sale of the product.