Anti-sweat heater control system and method

a control system and heater technology, applied in the direction of defrosting, cooling fluid circulation, domestic applications, etc., can solve the problems of large amount of “anti-sweat” required, the heat put into the frame is roughly half of the heat, and the electricity cost is significant, so as to achieve the effect of reducing condensation and/or eliminating condensation

a control system and heater technology, applied in the direction of defrosting, cooling fluid circulation, domestic applications, etc., can solve the problems of large amount of “anti-sweat” required, the heat put into the frame is roughly half of the heat, and the electricity cost is significant, so as to achieve the effect of reducing condensation and/or eliminating condensation

US20050229614A1Inactive Publication Date: 2005-10-20ALTECH CONTROLS
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  • Anti-sweat heater control system and method

Examples

Experimental program
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Embodiment Construction

[0018] The inventors have found that an anti-sweat heater control system can be incorporated into a refrigeration circuit of a refrigerated container or plurality of refrigerated containers, where the control system includes a plurality of heaters, one for each door frame or outer surface for which anti-sweat protection is desired, a temperature sensor located at a location on or associated with at least one door frame or outer surface of the refrigerated container and a zone relative humidity sensor, where the heaters are turned on whenever the temperature sensor reading is below a diversity factor corrected set point temperature and where the diversity factor is a difference between the temperature sensor reading and a critical temperature. The benefits of using a “diversity” factor verses a fixed set point are that: (1) the temperature sensor can be located where it is convenient rather than having to locate the sensor at the critical location, which may not be in a particularly ...

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Abstract

An improved anti-sweat heater control system is disclosed for reducing and / or eliminating sweat on cooled surfaces of a refrigerated container. A method for reducing or eliminating sweat from forming on cooled surfaces of a refrigerated container is also disclosed. A refrigerated container incorporating the anti-sweat heater control is also disclosed.

Description

RELATED APPLICATIONS [0001] This application claims provisional priority to U.S. Provisional Patent Application Ser. No. 60 / 559,113, filed 2 Apr. 2004.BACKGROUND OF THE INVENTION [0002] 1. Field of the Invention [0003] The present invention relates to a system and method for heating outer surfaces of a cooled container to prevent condensation or sweat. [0004] More particularly, the present invention relates to a system and method for heating outer surfaces of a cooled container to prevent condensation or sweat, where the apparatus includes a container, a cooling system and a heating system, where the heating system maintains the outer surfaces above a dew point temperature of a lowest temperature point on the outer surfaces for which anti-sweat protection is desired. [0005] 2. Description of the Related Art [0006] Many refrigerated display cases require electric strip heaters to be installed in the materials near the interface between the refrigerated zone and the ambient zone to pr...

Claims

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Application Information

Patent Timeline
20 Oct 2005
Publication
US20050229614A1
IPC
A47F3/04; F25D21/00; F25D21/04; F25D29/00
CPC
A47F3/0482; F25B2700/02; F25D2700/14; F25D29/00; F25D2500/04; F25D21/04
Inventors
ANSTED, ROGER