초록 ▼

An open show case of cold-air-circulation type having a front access opening, a passage with a cooler and an air fan for circulating cold air therethrough and forming a cold air curtain across the access opening, and at least one other air passage with an air fan for circulating air and forming anot

An open show case of cold-air-circulation type having a front access opening, a passage with a cooler and an air fan for circulating cold air therethrough and forming a cold air curtain across the access opening, and at least one other air passage with an air fan for circulating air and forming another protective layer of air curtain outside of the cold air curtain is defrosted by controllably operating the fans respectively in mutually adjacent air passages to blow air in mutually opposite directions thereby to cause air to flow in short-circuited flow at passage openings at the access opening, whereby air ejected from one passage at the access opening is immediately sucked into the adjacent passage without crossing the access opening, thereby to draw in warm outside air into the cold air passage and thereby to accomplish defrosting.

대표청구항 ▼

In an open show case oF cold-air-circulation type having: a case structure including an outer cabinet and a cooled commodity box disposed in the innermost part of said cabinet and adapted to hold commodities in cooled state, said case structure having a front opening for access from the outside to s

In an open show case oF cold-air-circulation type having: a case structure including an outer cabinet and a cooled commodity box disposed in the innermost part of said cabinet and adapted to hold commodities in cooled state, said case structure having a front opening for access from the outside to said commodities; a cold-air-circulation passage means formed adjacently around said box and provided therewithin with air cooling means and first air circulation means for circulating cold air through said passage means, said passage means having at respectively opposite ends thereof, and at opposite sides of said access opening, ejection nozzle means and corresponding suction inlet means between which a cold-air curtain is formed when air is thus circulated in normal cooling operation; and air passage means provided with second air circulation means and having air ejection nozzle means and corresponding suction inlet means for forming at least one protective air curtain outside of said cold-air curtain for shielding said cold-air curtain from the outside air, the improvement wherein the air circulation means in at least one of said passage means is reversible in air circulating direction, and wherein there is provided means operable at the time of defrosting of the show case to stop the operation of said air cooling means and operating said first and second air circulation means respectively in mutually adjacent air passage means to circulate air in mutually opposite directions thereby to cause air to flow in short-circuited flow at said ejection nozzle means and suction inlet means, in which flow, air ejected from one passage means is immediately sucked into an adjacent passage means without forming an air curtain across the access opening, thereby to draw warm outside air into said passage means and thereby to accomplish defrosting.