Refrigerated case with reheat and preconditioning

摘要

A refrigerated case (20) has a housing containing an interior volume (36) for storing items. Along an air flow path (510) through the case, a refrigerant-to-air heat exchanger (60) has an evaporator section (112) and a reheat section (114). A preconditioning section (110) may be upstream of the evaporator section (112) and the evaporator section is upstream of the reheat section (114). Along a refrigerant flow path (520), the reheat section (114) is downstream of the preconditioning section (110) (if any) and upstream of the evaporator section (112) and an expansion device (62) is between the reheat (114) and evaporator (112) sections.

主权项

1. A refrigerated case comprising:
a housing containing an interior volume for storing items; an air inlet; an air flow path extending from the air inlet; a fan positioned to drive an air flow along the air flow path; an air outlet along the air flow path positioned to discharge cold air to cool the interior volume; a refrigerant-to-air heat exchanger disposed along the air flow path, and a refrigerant flow path having at least a portion that extends through the heat exchanger; and an expansion device along the refrigerant flow path, wherein: along the air flow path, the heat exchanger has a preconditioning section, an evaporator section, and a reheat section, the evaporator section downstream of the preconditioning section and upstream of the reheat section; and along the refrigerant flow path, the preconditioning section is upstream of the reheat section, and the reheat section is upstream of the evaporator section and the expansion device is downstream of the reheat section and upstream of the evaporator section; and in the reheat section the refrigerant flow path is defined by reheat tube sections that are disposed adjacent to the top of the heat exchanger with the refrigerant configured to flow from the preconditioning section to an upper most one of the reheat tube sections and then toward a lower most one of the reheat tube sections.