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Refrigeration apparatus and method

a technology of refrigerating apparatus and evaporator, which is applied in the direction of defrosting, domestic cooling apparatus, application, etc., can solve the problems of unnecessary energy consumption, and achieve the effect of efficient defrosting of the evaporator assembly

Inactive Publication Date: 2013-06-27
KYSOR PANEL SYST DIV OF WELBILT WALK INS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent describes a refrigeration apparatus that uses a fan to cool the air, and an evaporator assembly to supply refrigerant to the fan. The apparatus has multiple sensors to measure the air temperature and the refrigerant temperature. A controller is connected to these sensors to control the evaporator assembly and the refrigerant assembly in cooling and defrost modes. The defrost mode is initiated based on the efficiency of the refrigerant leaving the evaporator coil and ended when the temperature setting or time setting is achieved. The method also includes steps to calculate reference dynamic efficiency, determine if it exceeds a predetermined threshold, initiate an electric defrost, deactivate the refrigeration assembly and fans, and determine if the temperature or time setting is reached to deactivate the defrost heater and activate the refrigeration assembly and fans again. The technical effects of this patent are to improve the efficiency of refrigeration systems, reduce energy consumption, and provide better control over the defrosting process.

Problems solved by technology

For the case of not needed, there is an unnecessary consumption of energy.

Method used

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Embodiment Construction

[0014]Referring to FIG. 1, a refrigeration apparatus 20 of the present disclosure comprises an evaporator assembly 22, a refrigerant assembly 24 and a controller 26.

[0015]Evaporator assembly 22 is located in an enclosed space 28 that requires refrigeration or air conditioning. Refrigerant assembly 24 and controller 26 are located outside enclosed space 28 with connections to one another and to evaporator assembly 22. Enclosed space 28 may be a room that is being cooled for refrigeration or air conditioning. For example, in a preferred embodiment, enclosed space 28 is a walk in refrigeration room.

[0016]Evaporator assembly 22 comprises a cabinet 29 that has openings 31 and 33 located in opposed sidewalls. Disposed within cabinet 29 are an evaporator coil 30, one or more defrost heater(s) 32, one or more fan(s) 34 and one or more fan motor(s) 36. Refrigerant enters cabinet 29 via a liquid line 40 and leaves via a compressor suction line 42. Lines 40 and 42 are connected to refrigerant ...

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PUM

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Abstract

Methods and apparatus for an energy efficient freezer or cooler defrost, which are particularly suited for an automated system, include procedures utilized for this purpose. The procedures are included in the firmware of an embedded controller and operate the cooler or freezer defrost cycle when required for increased energy efficiency.

Description

CROSS-REFERENCED APPLICATIONS[0001]This application claims priority to U.S. Provisional Application Ser. No. 61 / 566,555, filed on Dec. 2, 2011, which is incorporated herein in its entirety by reference thereto.BACKGROUND[0002]1. Field of the Disclosure[0003]This disclosure generally relates to a refrigeration apparatus and method and, in particular, to a refrigeration apparatus and method for efficient defrost of an evaporator assembly.[0004]2. Discussion of the Background Art[0005]In the current economic climate and legislative arena there is a necessity to reduce the energy consumption of HVAC and refrigeration equipment. To reduce the overall energy consumption of this equipment, electronic controllers are being applied to optimize the energy consumption of such equipment. One function that requires optimization is evaporator defrost.[0006]Prior art defrost strategies have used a timer to initiate a defrost process based on a predetermined schedule, whether or not needed. For the...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25D21/06
CPCF25D21/06F25D21/006F25D21/08F25D2700/10F25D2700/123
Inventor WORLEY, STEVEN TERENCECHANDLER, MICHAEL S.SCHARDT, DAVID L.MCCRANIE, ADAM FRANKLIN
Owner KYSOR PANEL SYST DIV OF WELBILT WALK INS