Blast chiller expressly for domestic use

Abstract

Built-in domestic blast chiller expressly designed for domestic use. The hot components (compressor 6 , condenser 7 ) of the blast chiller are positioned on the upper part of its rear wall ( 24 ) and in a seat ( 4 ) so as to facilitate their ventilation and in order to leave room for an inner space ( 33 ) for accomodating baking sheets, trays or grills of the same dimensions as those of traditional domestic built-in ovens.

1 . Built-in domestic blast chiller comprising a container to reversibly close a food treatment box, the container in turn comprising a front door, two side walls, an upper wall, a lower wall and a rear wall, wherein said rear wall comprises a first portion extending form the upper wall towards the lower wall inclined away from the door, and a second portion extending form said first portion orthogonally to said lower wall in a way that said first portion is on top of said second portion, said first portion forming a seat to receive a cooling fan a condenser being positioned just upon the fan, and a compressor, the first portion also forming an expansion zone for the cooling air, whereas said second portion forming a guide for suction of the cooling air, which guide is positioned substantially axially to said fan said guide for suction having a section that is smaller than the section of said seat. 
     
     
         2 . Blast chiller according to  claim 1 , wherein said seat comprises a support, provided with apertures, to support the compressor, the condenser and the fan for cooling the compressor and the condenser. 
     
     
         3 . Blast chiller according to  claim 2 , wherein the condenser is mounted just upon the fan in order to fully receive the air blown by the fan itself and the compressor is mounted laterally to the fan and the condenser in order to be brushed at least in part by the cooling air. 
     
     
         4 . Blast chiller according to  claim 1 , wherein the rotating axis of the fan is orthogonal to the surface of major thermal exchange of the condenser and the fan is at the same time substantially axially aligned with the suction guide positioned lower to the seat in order to create an air flux substantially rectilinear. 
     
     
         5 . Blast chiller according to  claim 1 , wherein the internal space defined by the rear wall comprises a lower zone having a depth adapted to receive backing sheets, trays or grills having typical dimension of the corresponding baking sheets of a built-in domestic woven. 
     
     
         6 . Blast chiller according to  claim 1 , wherein the refrigerant fluid is R600a gas. 
     
     
         7 . Blast chiller according to  claim 1 , comprising a tray to collect the mist, the tray being positioned in contact to the second portion of the wall rear and close to the compressor so that to contribute to partially guide the air flux below the fan, however a part of the flux contacting also the tray and the compressor so that to help the evaporation of the mist form one hand and at the same time to brush the compressor. 
     
     
         8 . Process for cooling a condenser and a compressor of a built-in domestic blast chiller, comprising the steps of:
 providing a built-in domestic blast chiller comprising a front door, two side walls, an upper wall, a lower wall and a rear wall, said rear wall being provided with a first portion extending form the upper wall towards the lower wall inclined away from the door, and a second portion extending form said first portion orthogonally to said lower wall, said first portion forming a seat to receive a condenser, a compressor and a cooling fan, and a second portion forming a suction zone of the cooling air, which zone is positioned substantially axially to said fan   switching on the fan to create an in-flux of cooling air directed rectilinearly and orthogonally to the surface of major thermal exchange of the condenser, travelling first a zone upstream of the fan with a flux being substantially axially aligned with said fan, and then arriving at an expansion zone, which zone accommodates the condenser.   
     
     
         9 . Process according to  claim 8 , further comprising a step of narrowing of the air flux after having crossed said condenser in order to accelerate the removal of the hot air.