The combination of claim 8, in which the coolant flow control means comprises a normally open solenoid valve constructed and arranged on the high side of each modular cooling means.ġ2.
The combination of claim 8, in which the coolant is a vapor phase refrigerant, and the coolant flow control means comprises electronic evaporator pressure regulating valve means constructed and arranged on the low side of the modular cooling means.ġ1.
The combination of claim 8, in which the coolant is a vapor phase refrigerant, and the coolant flow control means comprises an electronic expansion valve constructed and arranged on the high side of each modular cooling means.ġ0. The combination of claim 1, in which said defrosting means comprises coolant flow control means including valve means associated with the modular cooling means and controller means for operating said valve means.ĩ. The combination of claim 6, wherein the scheduled length of time of the defrosting mode is inverse to the scheduled daily frequency of the defrosting mode.Ĩ. The combination of claim 1, in which said defrosting mode for each modular coil is scheduled on a daily frequency of 3 to 24 times.ħ. The combination of claim 2, in which the defrosting mode includes a cooling pull-down period of the defrosted modular cooling means at the end of the drip time period whereby to re-establish a normal refrigerating mode thereof.Ħ. The combination of claim 2, wherein said drip time period is in the range of 0.5 to 5 minutes.ĥ. The combination of claim 1, wherein said defrost period is in the range of 3 to 40 minutes.Ĥ. The combination of claim 1, wherein said defrosting mode for each modular cooling means includes a defrosting period and a drip time period.ģ. In combination with a merchandiser cabinet having a continuous refrigerated product area defined by a plurality of contiguous product zones and separate air flow circulation means for each of the respective product zones, laterally adjacent modular cooling means associated with the respective air flow circulation means and together producing a normal air flow cooling mode the improvement comprising defrosting means constructed and arranged for selectively discontinuing the normal cooling mode of one modular cooling means to effect a defrosting mode thereof during a period of continued normal cooling mode operation of another of said modular cooling means, and thereafter defrosting another modular cooling means after re-establishing normal air flow cooling of said one modular cooling means.Ģ. Multi-tiered open bin refrigerated showcases and in method of refrigerating pertaining theretoĭefrost method and means for refrigerated cabinetsġ. Valve control means and refrigeration systems thereforĮVAPORATOR CONTROL WITH CONSTANT PRESSURE EXPANSION VALVE AND BYPASS MEANS Refrigeration control system for optimum demand operation Refrigeration system control method and apparatus Refrigerator with plural storage chambers Multi-stage cooling system for commerical refrigerationĭefrosting device for a low temperature display caseĪpparatus for monitoring solenoid expansion valve flow rates Refrigerated merchandiser with modular evaporator coils and EEPR control Strategic modular secondary refrigeration
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