Front-loader dishwashing machine with heat recovery

Abstract

A dishwashing machine for commercial use is provided, which has a dishwashing chamber with a front door which can be opened for loading and unloading the dishwashing chamber with items to be cleaned. Furthermore, the dishwashing machine has at least one condensation precipitation device, which is connected to the dishwashing chamber and is equipped with at least one fan for sucking and/or blowing vapor and/or air out of the closed dishwashing chamber. The condensation precipitation device also has at least one condensation surface for condensation of vapor. The dishwashing machine additionally has an inlet-air channel for supplying ambient air into the dishwashing chamber. The inlet-air channel is provided with an inlet-air fan.

1 . A dishwashing machine comprising:
 a dishwashing chamber with a front door that is configured to be opened for loading and unloading the dishwashing chamber with items to be cleaned;   at least one condensation precipitation device connected to the dishwashing chamber, the condensation precipitation device having at least one fan for sucking and/or blowing vapor and/or air out of the closed dishwashing chamber, the condensation precipitation device having at least one condensation surface for condensation of vapor; and   an inlet-air channel for supplying ambient air into the dishwashing chamber, the inlet-air channel being provided with an inlet-air fan.   
     
     
         2 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device is accommodated entirely or partially in a top part of the dishwashing chamber. 
     
     
         3 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device is accommodated entirely or partially in a rear wall of the dishwashing chamber. 
     
     
         4 . The dishwashing machine according to  claim 1 , wherein the dishwashing machine operates a second fan and the inlet-air fan such that they are synchronized in time to start them at a same time and/or with a predetermined time offset. 
     
     
         5 . The dishwashing machine according to  claim 4 , wherein the dishwashing machine stops the inlet-air fan at the same time as or at a time before the second fan. 
     
     
         6 . The dishwashing machine according to  claim 1 , wherein the inlet-air channel is arranged at least partially in an area of the rear wall of the dishwashing chamber. 
     
     
         7 . The dishwashing machine according to  claim 1 , wherein the inlet-air channel has an inlet air opening to a working environment on the rear face and/or a top face of the dishwashing chamber. 
     
     
         8 . The dishwashing machine according to  claim 1 , wherein the inlet-air channel comprises a blowing-in opening provided in a bottom area of the dishwashing chamber. 
     
     
         9 . The dishwashing machine according to  claim 1 , wherein the inlet-air channel has an inlet air valve and/or an inlet air flap. 
     
     
         10 . The dishwashing machine according to  claim 1 , wherein at least one flow guiding device is provided in a cover area of the dishwashing chamber and is designed to assist flow to pass uniformly through the dishwashing chamber, and wherein the flow guiding device comprises flow laminates and/or a perforated intermediate cover. 
     
     
         11 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device is designed such that at least a portion of the flow of the air which is sucked out of the dishwashing chamber is passed back again into the dishwashing chamber after flowing through the condensation precipitation device. 
     
     
         12 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device has at least one chamber with at least one inlet and at least one outlet and at least one condensation outflow. 
     
     
         13 . The dishwashing machine according to  claim 4 , wherein the second fan is connected to the inlet and/or to the outlet. 
     
     
         14 . The dishwashing machine according to  claim 12 , wherein the at least one chamber defines at least one flow channel. 
     
     
         15 . The dishwashing machine according to  claim 4 , wherein the second fan is connected to the flow channel. 
     
     
         16 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device has at least one condenser elements, the condenser elements including: at least one cold plate; at least one cold plate that is sprayed with a cooling medium; and/or at least one heat exchanger through which a cooling medium flows, in particular a plate-type heat exchanger and/or a serpentine cooling coil-type heat exchanger. 
     
     
         17 . The dishwashing machine according to  claim 16 , wherein the at least one condenser element has at least one of the following arrangements: the at least one condenser element is aligned at an angle to the horizontal; the at least one condenser element has a laminate arrangement; the at least one condenser element has a meandering arrangement; or the at least one condenser element has a parallel arrangement of at least two condenser elements. 
     
     
         18 . The dishwashing machine according to  claim 1 , wherein the condensation precipitation device has at least one condenser element that is cooled with water, wherein the condenser element includes at least one first condenser connection that is connected to a water supply, in particular to a freshwater supply, and wherein the condensation precipitation device includes at least one second condenser connection connected to a tank for the dishwashing machine, in particular to a final washing tank. 
     
     
         19 . The dishwashing machine according to  claim 1 , wherein the dishwashing machine performs a dishwashing program, with the condensation precipitation device being operated in at least one program step in the dishwashing program in order to suck vapor and/or air out of the dishwashing chamber. 
     
     
         20 . The dishwashing machine according to  claim 19 , wherein at least one suction program step is carried out at an end of the dishwashing program. 
     
     
         21 . The dishwashing machine according to  claim 1 , wherein items to be cleaned which are accommodated in the dishwashing chamber are finally washed in at least one final washing program step using a final washing liquid from a final washing tank with cooling water being heated in a subsequent suction program step in the condensation precipitation device by vapor and/or air from the dishwashing chamber and with the heated cooling water being passed into the final washing tank. 
     
     
         22 . The dishwashing machine according to  claim 21 , wherein the final washing tank has a two-level control system, with the final washing program step being carried out until a level in the final washing tank has reached a lower level, and with the subsequent suction program step being carried out until the level in the final washing tank has reached an upper level. 
     
     
         23 . The dishwashing machine according to  claim 1 , wherein at least one liquid valve is provided for controlling a supply of a cooling medium, with the dishwashing machine being designed in order to synchronize the time of the operation of the liquid valve and the operation of the fan. 
     
     
         24 . The dishwashing machine according to  claim 23 , wherein the dishwashing machine is designed such that the liquid valve is opened and a second fan is started substantially at the same time.