Composite and stereoscopic structure with laminated exchanger flake was used on evaporator of freezing chamber.Wing-flakes were fixed outside the refrigerant pipe coil with a S type to increase the refrigeration capacity of the top part and the bottom part of freezing chamber. Freezing chamber was divided into variable temperature areas according to 1:1 proportion.A temperature sensor controls On-Off of an double steady states electro-magnetic valve so that cut-over of refrigerant circuit can be completed. Variable temperature areas might be used as freezing chamber

lower-degree freezing chamber

or cold storage chamber and also could be shut off. By the optimizing design of the condenser structure

direction and position of anti-condensation pipe and evaporator

circling-gas exchanger and by matching the load of compressor

condenser

and evaporator

a direct cooling refrigerator

BCD-186CHS

was recently developed. It consumes 0.39 kWh per day under the maximum load

and less than 0.35kWh even 0.31 kWh per day when the variable temperature chamber is operating under economy condition.