DETECTION OF CO2 LEAKAGE IN A CONTAINER
First Claim
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1. A refrigerated container system comprising:
- a refrigeration system including a refrigeration circuit having in serial flow relationship a compressor for compressing CO2 vapor as a refrigerant, a heat rejecting heat exchanger, an expansion device and a heat absorbing heat exchanger;
a refrigerated container having said heat absorbing heat exchanger disposed in heat exchange relationship with a flow of air circulating within said refrigerated container;
a CO2 sensor located within said flow of air for sensing when a level of CO2 concentration therein reaches a predetermined higher level and for generating a signal representative thereof; and
a control for receiving said representative signal and responsively generating a visual display of the sensed condition.
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Accused Products
Abstract
A refrigerated container having a refrigeration system using CO2 as the refrigerant, includes a sensing and warning system for sensing the CO2 concentration in the container and responsively displaying the sensed condition in a display module so that an operator will be aware of excess levels of concentration which might present a hazardous condition and therefore should not enter the container until the condition is alleviated.
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Citations
7 Claims
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1. A refrigerated container system comprising:
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a refrigeration system including a refrigeration circuit having in serial flow relationship a compressor for compressing CO2 vapor as a refrigerant, a heat rejecting heat exchanger, an expansion device and a heat absorbing heat exchanger; a refrigerated container having said heat absorbing heat exchanger disposed in heat exchange relationship with a flow of air circulating within said refrigerated container; a CO2 sensor located within said flow of air for sensing when a level of CO2 concentration therein reaches a predetermined higher level and for generating a signal representative thereof; and a control for receiving said representative signal and responsively generating a visual display of the sensed condition. - View Dependent Claims (2)
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3. A method of reducing the risk of an operator entering a cargo container which may contain CO2 leakage from an associated vapor compression refrigeration system comprising the steps of:
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sensing the concentration of CO2 in the container and generating a representative signal thereof; providing a controller for receiving said representative signal and for providing an appropriate display signal in response thereto; and a display console for receiving said display signal and generating an appropriate visual display thereof. - View Dependent Claims (4, 5, 6, 7)
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Specification