초록 ▼

A well type open top refrigerated display case has a primary air conduit extending around the cabinet and main fans for circulating air through the primary conduit and across the open top of the cabinet in the form of an air curtain. A column extends upwardly from and above the well type region; def

A well type open top refrigerated display case has a primary air conduit extending around the cabinet and main fans for circulating air through the primary conduit and across the open top of the cabinet in the form of an air curtain. A column extends upwardly from and above the well type region; defrost fans are located in a defrost conduit in the column. Defrost control means are provided for energizing the defrost fans at the start of a defrost cycle to draw ambient air from above the refrigerated display case into the upper portion of the defrost conduit at a higher pressure than the air pressure in the region of the open top; a portion of the higher pressure ambient air is directed out of the defrost conduit to collide with the air curtain flowing across the open top, the flow of the air curtain being thereby reversed and caused to flow over the top of and outside the display case. A further portion of ambient air is drawn downwardly by the main fans to flow through the primary conduit and assist in defrosting the coils.

대표청구항 ▼

A refrigerated display case, comprising: an open top cabinet containing a well type region; defrost conduit means extending upwardly in said well type region between opposite sides of said cabinet to divide said well type region into separate first and second open top product display spaces; first a

A refrigerated display case, comprising: an open top cabinet containing a well type region; defrost conduit means extending upwardly in said well type region between opposite sides of said cabinet to divide said well type region into separate first and second open top product display spaces; first air conduit means extending around said first display space within said cabinet, said first air conduit means containing first refrigeration coil means; first air outlet means and first air inlet means of said first air conduit means located on opposite sides of said first display space; second air conduit means extending around said second display space within said cabinet, said second air conduit means containing second refrigeration means; second air outlet means and second air inlet means of said second air conduit means located on opposite sides of said second display space; wherein said first and second inlet means are located in said column and said defrost conduit means comprises an upwardly extending part of said first and second conduits; main air circulating means for circulating air through said first and second conduit means, respectively, and across the open tops of said first and second display spaces between the respective outlet means and inlet means in the form of respective air curtains during a refrigeration cycle; further air circulating means located in said defrost conduit means above said respective first and second inlet means; and defrost control means for energizing said further air circulating means at the start of a defrost cycle to draw ambient air from above the refrigerated display case into said defrost conduit means, first and second portions of said ambient air being directed out of said first and second inlet means to collide with said first and second air curtains flowing toward said first and second inlet means, respectively, at least portions of said air curtains being thereby reversed and caused to flow over the top of and outside the display case, and a further portion of said ambient air being drawn into said first and second conduit means by said main air circulating means to flow through said first and second conduit means and over said first and second refrigeration coil means.