Freezer with Evaporative Condensing Arrangement

Abstract

A freezer includes a plurality of connecting pipes, a first freezer casing having a first storage compartment, a first compressor, a first evaporator received in the first freezer casing, and an evaporative condensing arrangement comprising an evaporative cooling unit. The evaporative cooling unit includes a first heat exchanger, a water pumping device, a water distribution apparatus, a water collection basin, and a cooling fan. A predetermined amount of refrigerant is guided to circulate between the first evaporator, the first compressor and the heat exchanger. A predetermined amount of cooling water is sprayed on the heat exchanger for performing heat exchange with the refrigerant flowing therethrough, wherein the cooling water is cooled by the ambient air which is drawn from an air inlet and flows out of the evaporative cooling unit through an air outlet.

What is claimed is: 
     
         1 . A freezer, comprising:
 a plurality of connecting pipes;   a first freezer casing having a first storage compartment;   a first compressor;   an first evaporator received in said first freezer casing, said first evaporator being connected to said first compressor through at least one of said connecting pipes; and   an evaporative condensing arrangement comprising an evaporative cooling unit having an air inlet and an air outlet, said evaporative cooling unit being positioned in an outdoor environment and comprising:   a first heat exchanger having a first heat exchanging inlet connected to said first compressor through at least one of said connecting pipes, and a first heat exchanging outlet connected to said first evaporator through at least one of said connecting pipes;   a water pumping device;   a water distribution apparatus connected to said water pumping device through at least one of said connecting pipes, and arranged to distribute a predetermined amount of water to said first heat exchanger;   a water collection basin arranged to collect said water from said heat exchanger; and   a cooling fan provided above said water distribution apparatus for drawing ambient air to flow from said air inlet to said air outlet;   wherein a predetermined amount of refrigerant is guided to circulate between said first evaporator, said first compressor and said heat exchanger, a predetermined amount of cooling water being sprayed on said first heat exchanger for performing heat exchange with said refrigerant flowing therethrough, said cooling water being cooled by said ambient air drawn from said air inlet, said ambient air being guided to flow out of said evaporative cooling unit through said air outlet.   
     
     
         2 . The freezer, as recited in  claim 1 , wherein said first heat exchanger comprises a first heat exchanging tube configured to form a manifold structure in which said first heat exchanging inlet and said first heat exchanging outlet are connected to said first heat exchanging tube, refrigerant from said first compressor being guided to flow through said first heat exchanging tube through said first heat exchanging inlet. 
     
     
         3 . The freezer, as recited in  claim 2 , wherein said water distribution apparatus is positioned above said first heat exchanger, and comprises a water distributing basin, and a water spraying device provided underneath said water distributing basin, said water collection basin having a distributing cavity for storing a predetermined amount of cooling water, said cooling water stored in said distributing cavity being guided to pass through said water spraying device and sprayed on said first heat exchanging tube. 
     
     
         4 . The freezer, as recited in  claim 3 , wherein said evaporative cooling unit comprises two air inlets forming on two sides of said first heat exchanger while said air outlet is formed on top of said cooling fan. 
     
     
         5 . The freezer, as recited in  claim 4 , wherein said first heat exchanging inlet is positioned above said first heat exchanging outlet so that said refrigerant is guided to flow from an elevated altitude to a lower altitude. 
     
     
         6 . The freezer, as recited in  claim 5 , further comprising a first flow regulator connected between said first evaporator and said first heat exchanger for regulating a flow rate of said refrigerant between said first heat evaporator and said first heat exchanger. 
     
     
         7 . The freezer, as recited in  claim 3 , further comprising a second freezer casing which comprises a second storage compartment, a second evaporator provided in said second freezer casing and thermally communicating with said second storage compartment, and a second compressor connected between said second evaporator and said evaporative cooling unit, said second evaporator comprising at least one second heat exchanging pipe configured to form a manifold structure for thermally communicating with said air circulating in said second storage compartment. 
     
     
         8 . The freezer, as recited in  claim 7 , wherein said evaporative cooling unit further comprises a second heat exchanger provided underneath said first heat exchanger, said second heat exchanger having a second heat exchanging inlet and a second heat exchanging outlet, and comprising a second heat exchanging tube configured to form a manifold structure in which said second heat exchanging inlet and said second heat exchanging outlet are connected to said second heat exchanging tube, refrigerant from said second compressor being guided to flow through said second heat exchanging tube through said second heat exchanging inlet. 
     
     
         9 . The freezer, as recited in  claim 8 , wherein said water collection basin is positioned below said second heat exchanger so that said cooling water spraying on said first heat exchanging tube is arranged to flow down to said second heat exchanging tube and eventually collected in said water collection basin. 
     
     
         10 . The freezer, as recited in  claim 9 , wherein said second heat exchanging inlet is positioned above said second heat exchanging outlet so that said refrigerant is arranged to flow from an elevated attitude to a lower altitude. 
     
     
         11 . The freezer, as recited in  claim 10 , wherein said evaporative cooling unit comprises two air inlets forming on two sides of said first heat exchanger and said second heat exchangers while said air outlet is formed on top of said cooling fan. 
     
     
         12 . The freezer, as recited in  claim 11 , further comprising a second flow regulator connected between said second evaporator and said second heat exchanger for regulating a flow rate of said refrigerant flowing between said second heat evaporator and said second heat exchanger. 
     
     
         13 . The freezer, as recited in  claim 7 , wherein said evaporative cooling unit further comprises a second heat exchanger provided adjacent to said first heat exchanger, said second heat exchanger having a second heat exchanging inlet and a second heat exchanging outlet, and comprising a second heat exchanging tube configured to form a manifold structure in which said second heat exchanging inlet and said second heat exchanging outlet are connected to said second heat exchanging tube, refrigerant from said second compressor being guided to flow through said second heat exchanging tube through said second heat exchanging inlet. 
     
     
         14 . The freezer, as recited in  claim 13 , wherein said first heat exchanger and said second heat exchanger are configured to be positioned in a side-by-side manner, said cooling water from said water distribution apparatus being sprayed on said first heat exchanging tube and said second heat exchanging tube simultaneously, said cooling water spraying on said first heat exchanging tube and said second heat exchanging tube being collected by said water collection basin. 
     
     
         15 . The freezer, as recited in  claim 13 , wherein said first heat exchanger and said second heat exchanger are configured to be positioned in a front-and-rear manner, in which said first heat exchanger is positioned in front of said second heat exchanger, said cooling water from said water distribution apparatus being sprayed on said first heat exchanging tube and said second heat exchanging tube simultaneously, said cooling water spraying on said first heat exchanging tube and said second heat exchanging tube being collected by said water collection basin. 
     
     
         16 . The freezer, as recited in  claim 14 , wherein said water collection basin is positioned below said second heat exchanger so that said cooling water spraying on said first heat exchanging tube is arranged to flow down to said second heat exchanging tube and eventually collected in said water collection basin. 
     
     
         17 . The freezer, as recited in  claim 15 , wherein said water collection basin is positioned below said second heat exchanger so that said cooling water spraying on said first heat exchanging tube is arranged to flow down to said second heat exchanging tube and eventually collected in said water collection basin. 
     
     
         18 . The freezer, as recited in  claim 16 , wherein said second heat exchanging inlet is positioned above said second heat exchanging outlet so that said refrigerant is arranged to flow from an elevated attitude to a lower altitude. 
     
     
         19 . The freezer, as recited in  claim 17 , wherein said second heat exchanging inlet is positioned above said second heat exchanging outlet so that said refrigerant is arranged to flow from an elevated attitude to a lower altitude. 
     
     
         20 . The freezer, as recited in  claim 18 , wherein said evaporative cooling unit comprises two air inlets forming on two sides of said first heat exchanger and said second heat exchangers while said air outlet is formed on top of said cooling fan. 
     
     
         21 . The freezer, as recited in  claim 19 , wherein said evaporative cooling unit comprises two air inlets forming on two sides of said first heat exchanger and said second heat exchangers while said air outlet is formed on top of said cooling fan. 
     
     
         22 . The freezer, as recited in  claim 20 , further comprising a second flow regulator connected between said second evaporator and said second heat exchanger for regulating a flow rate of said refrigerant flowing between said second heat evaporator and said second heat exchanger. 
     
     
         23 . The freezer, as recited in  claim 21 , further comprising a second flow regulator connected between said second evaporator and said second heat exchanger for regulating a flow rate of said refrigerant flowing between said second heat evaporator and said second heat exchanger.