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Evaporator fan motor control in a refrigerated merchandiser

a technology of evaporator fans and merchandisers, which is applied in the direction of defrosting, domestic cooling devices, applications, etc., can solve the problems of one or more evaporator fans having an energy consumption, and achieve the effects of reducing energy consumption, generating waste heat energy, and improving heat energy transfer

Inactive Publication Date: 2010-09-30
UNIVERSAL NOLIN
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]A refrigeration apparatus having an evaporator fan motor control includes an evaporator to remove heat energy from the air in a cooled storage space. The evaporator transfers the heat energy to a refrigerant. At least one evaporator fan moves air from the cooled storage space across the evaporator to improve the transfer of heat energy into the refrigerant. The one or more evaporator fans have an energy consumption and generate a waste heat energy. A refrigeration control unit at least controls the operation of the one or more evaporator fans. During an off mode, the one or more evaporator fans are operated in a reduced energy consumption mode to reduce the energy consumption of the one or more evaporator fans and to reduce the waste heat while still defrosting the evaporator in the off mode.

Problems solved by technology

The one or more evaporator fans have an energy consumption and generate a waste heat energy.

Method used

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  • Evaporator fan motor control in a refrigerated merchandiser
  • Evaporator fan motor control in a refrigerated merchandiser
  • Evaporator fan motor control in a refrigerated merchandiser

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[0026]A simulation of the preferred embodiment where evaporator fan speed is reduced during the cooling off mode was carried out. The graph of FIG. 6 shows a comparison of standard operation of refrigerated merchandiser according to the prior art compared to operation of the evaporator fans at a reduced speed during the off mode according to the invention. The graph is a plot of electrical power consumption (in Watts) plotted versus relative units of time, such as numbered sample points (on a scale of 0 to 1200). The solid curve shows the power consumption of an exemplary refrigerated merchandiser operated with the evaporator fans always on at a single fixed motor speed. The dotted curve, overlapping the solid curve during common operation over the on cycle, shows the dramatic power savings with a two speed evaporator motor dropped to a low speed during the off mode. FIG. 7 is a table that shows the cost savings achieved by the reduced need for electrical power by a refrigerated mer...

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PUM

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Abstract

A refrigeration apparatus having an evaporator fan motor control includes an evaporator to remove heat energy from the air in a cooled storage space. The evaporator transfers the heat energy to a refrigerant. At least one evaporator fan moves air from the cooled storage space across the evaporator to improve the transfer of heat energy into the refrigerant. The one or more evaporator fans have an energy consumption and generate a waste heat energy. A refrigeration control unit at least controls the operation of the one or more evaporator fans. During an off mode, the one or more evaporator fans are operated in a reduced energy consumption mode to reduce the energy consumption of the one or more evaporator fans and to reduce the waste heat while still defrosting the evaporator in the off mode.

Description

FIELD OF THE INVENTION[0001]This invention relates generally to a method and apparatus for the operation of evaporator fans and more particularly to the operation of evaporator fans in refrigerated merchandisers.BACKGROUND OF THE INVENTION[0002]Merchants of refrigerated beverages, snacks, and perishable foods typically use refrigerated merchandisers to market these products. Refrigerated merchandisers generally comprise a cooled storage space with shelves and a compressor, an evaporator, and a condenser to carry out a refrigeration cycle to cool the storage space. One or more evaporator fans blow storage space air over an evaporator, typically transferring heat energy from the storage space air to a circulating refrigerant in the evaporator coil to facilitate the refrigeration process. Also, one or more condenser fans blow ambient room air to cool the condenser, removing heat energy from the refrigerant.[0003]When the refrigerator is actively cooling the storage space in an “on mode...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25D17/06F25D17/04A47F3/04F25B39/04
CPCF25B2600/0251F25B2600/112F25D21/006F25D17/06F25B2700/2117
Inventor DADDIS, JR., EUGENE DUANEDANIELS, MARK A.CLARK, DANIEL R.ESFORMES, JACK L.
Owner UNIVERSAL NOLIN
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