Refrigerated display cabinet

Abstract

Described herein is a refrigerated display cabinet. The cabinet comprises a case comprising shelves disposed between side walls of the case to form a conservation space to store products therewithin, a duct extending from a bottom front side of the cabinet to a top front side of the cabinet via a rear side of the cabinet, and at least one heat exchanger, each comprising one or more headers and a plurality of heat exchange tubes extending between the headers. The heat exchange tubes comprise at least one bend formed along a length of the heat exchange tubes to define at least two sections of the heat exchange tubes. The heat exchanger is disposed within the duct of the cabinet such that the headers remain at one lateral end of the rear side and at least one of the bends of the heat exchange tubes remains opposite to the headers.

1 . A refrigerated display cabinet comprising:
 a case comprising one or more shelves disposed between side walls of the case to form a conservation space to support and store one or more products therewithin;   a duct extending from a bottom front side of the cabinet to a top front side of the cabinet via a rear side of the cabinet; and   at least one heat exchanger, each comprising one or more headers and a plurality of heat exchange tubes extending between the one or more headers, the plurality of heat exchange tubes comprising at least one bend formed along a length of the heat exchange tubes to define at least two sections of the heat exchange tubes,   wherein the at least one heat exchanger is disposed within the duct on the rear side of the cabinet such that the one or more headers remain at one lateral end of the rear side and at least one of the bends of the plurality of heat exchange tubes remains opposite to the headers.   
     
     
         2 . The refrigerated display cabinet of  claim 1 , wherein the plurality of heat exchange tubes comprises a bend defining a first section and a second section of the heat exchange tubes,
 wherein the at least one heat exchanger is disposed within the duct on the rear side of the cabinet such that the one or more headers remain at one lateral end of the rear side and the bend of the plurality of heat exchange tubes remains opposite to the headers.   
     
     
         3 . The refrigerated display cabinet of  claim 1 , wherein the at least one bend is a ribbon fold formed by bending and twisting the plurality of heat exchange tubes, wherein the at least one bend is formed about an axis extending substantially perpendicular to a longitudinal axis of the plurality of heat exchange tubes. 
     
     
         4 . The refrigerated display cabinet of  claim 1 , wherein the first section and the second section are substantially parallel with a predefined gap therebetween. 
     
     
         5 . The refrigerated display cabinet of  claim 4 , wherein a longitudinal axis of the first section and the second section is inclined at a first predefined angle with respect to a horizontal plane such that the one or more headers at one lateral end of the rear side remain at a different elevation than the at least one bend of the plurality of heat exchange tubes at an end opposite to the one or more headers. 
     
     
         6 . The refrigerated display cabinet of  claim 1 , wherein the first section and the second section are non-parallel to each other. 
     
     
         7 . The refrigerated display cabinet of  claim 6 , wherein a longitudinal axis of the first section is inclined at a first predefined angle with respect to a horizontal plane and a longitudinal axis of the second section is inclined at a second predefined angle with respect to the horizontal plane such that the one or more headers remain at different elevations at the same lateral end of the rear side of the cabinet and such that the one or more headers remain at different elevations than the at least one bend of the plurality of heat exchange tubes at an end opposite to the one or more headers. 
     
     
         8 . The refrigerated display cabinet of  claim 5 , wherein the first predefined angle or the second predefined angle is of at least 10° to 15° to the horizontal plane. 
     
     
         9 . The refrigerated display cabinet of  claim 1 , wherein the at least one heat exchanger comprises a first header and a second header, each disposed at a left end or a right end of a rear airflow zone of the cabinet, and extending longitudinally between a front end and a rear end of the rear airflow zone, wherein the plurality of heat exchange tubes with the bend fluidically connect the first header and the second header. 
     
     
         10 . The refrigerated display cabinet of  claim 1 , wherein the first header and the second header are oriented parallel to the horizontal plane, extending between a front end and a rear end of a rear airflow zone of the cabinet, wherein the second header remains at a predefined height above the first header and such that both the headers remain at different elevations than the bend of the plurality of heat exchange tubes at an end opposite to the headers. 
     
     
         11 . The refrigerated display cabinet of  claim 10 , wherein the first header and the second header are oriented at a third predefined angle from the horizontal plane, extending between a front end and a rear end of the rear airflow zone. 
     
     
         12 . The refrigerated display cabinet of  claim 1 , wherein the at least one heat exchanger comprises a plurality of fins extending between at least some of the plurality of heat exchange tubes, wherein the plurality of fins extending between at least some of the plurality of heat exchange tubes is louvered such that a louver airflow path is formed between the adjacent louvers. 
     
     
         13 . The refrigerated display cabinet of  claim 1 , wherein the cabinet comprises at least one fan positioned upstream or downstream of the at least one heat exchanger within the duct, wherein the at least one fan is configured to facilitate the inflow of air within the duct through the bottom front side of the cabinet, pass the received air through the at least one heat exchanger to cool the received air, and pump out the cool air from the top front side of the cabinet, and
 wherein the cool air pumped out by the top front side of the cabinet is received by the bottom front side of the cabinet such that an aerothermodynamic barrier or air curtain is formed in front of the one or more shelves or behind the doors of the cabinet.   
     
     
         14 . The refrigerated display cabinet of  claim 1 , wherein the heat exchanger is disposed within the rear airflow zone such that the at least one heat exchanger remains at least partially below a bottom-most shelf among the one or more shelves in order to discharge a portion of the cool through a perforated wall panel (PWP), configured with the duct in the rear airflow zone, to the conservation space below the bottom-most shelf and above a bottom airflow zone of the cabinet. 
     
     
         15 . The refrigerated display cabinet of  claim 1 , wherein the cabinet is any of an open-front type display cabinet, or a door-type display cabinet comprising one or more doors movably coupled to a front end of the case. 
     
     
         16 . A heat exchanger for a refrigerated display cabinet, the heat exchanger comprising:
 a first header and a second header disposed within a rear side of a duct associated with the cabinet such that both the first header and second header remain disposed at same lateral end of the rear side of the cabinet, wherein the duct extends from a bottom front side of the cabinet to a top front side of the cabinet via the rear side of the cabinet; and   a plurality of heat exchange tubes extending between the first header and the second header, the plurality of heat exchange tubes comprising a bend formed along a length of the heat exchange tubes to define a first section and a second section of the heat exchange tubes, wherein the at least one heat exchanger is configured within the duct such that the bend of the plurality of heat exchange tubes remains opposite to the first header and the second header.   
     
     
         17 . The heat exchanger of  claim 16 , wherein the bend is a ribbon fold formed by bending and twisting the plurality of heat exchange tubes, wherein the bend is formed about an axis extending substantially perpendicular to a longitudinal axis of the plurality of heat exchange tubes. 
     
     
         18 . The heat exchanger of  claim 16 , wherein a longitudinal axis of the first section and the second section is inclined at a first predefined angle with respect to a horizontal plane such that the one or more headers remain at different elevations at same lateral end of the rear side of the cabinet and such that the one or more headers remain at different elevations than the bend of the plurality of heat exchange tubes at an end opposite to the one or more headers. 
     
     
         19 . The heat exchanger of  claim 16 , wherein a longitudinal axis of the first section is inclined at a first predefined angle with respect to a horizontal plane and a longitudinal axis of the second section is inclined at a second predefined angle with respect to the horizontal plane such that the first and second headers remain at different elevations at same lateral end of the rear side of the cabinet and such that the one or more headers remain at different elevations than the bend of the plurality of heat exchange tubes at an end opposite to the one or more headers. 
     
     
         20 . The heat exchanger of  claim 16 , wherein the heat exchanger comprises a plurality of fins extending between at least some of the plurality of heat exchange tubes, wherein the plurality of fins extending between at least some of the plurality of heat exchange tubes is louvered such that a louver airflow path is formed between the adjacent louvers.