Refrigeration unit and diagnostic method therefor
First Claim
1. A refrigeration unit comprising:
- a housing including an insulated cavity configured to store food and beverages;
a vapor cycle system disposed in the housing, the vapor cycle system operative to cool the food and beverages in the insulated cavity;
a plurality of sensors disposed in the housing, the plurality of sensors in communication with the vapor cycle system and outputting data relative to the vapor cycle system; and
a controller, according to the data from the plurality of sensors, determining an occurrence of an event and outputting control signals to the vapor cycle system, and wherein the controller logs the data to a data structure according to a first data-logging mode, and to the data structure according to a second data-logging mode upon occurrence of the event.
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Accused Products
Abstract
A refrigeration unit and diagnostic method therefor are provided. The refrigeration unit includes: a housing with an insulated cavity for storing food and beverages; a vapor cycle system operative to cool the food and beverages in the insulated cavity; a plurality of sensors in communication with the vapor cycle system and outputting data relative to the vapor cycle system; and a controller that, according to the data from the plurality of sensors, determines an occurrence of an event. Wherein the controller logs the data from the plurality of sensors to a data structure according to a first data-logging mode, and logs the data to the data structure according to a second data-logging mode upon occurrence of the event. In one embodiment the refrigeration unit may be a refrigeration line replaceable unit (LRU) configured for an aircraft galley.
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Citations
27 Claims
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1. A refrigeration unit comprising:
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a housing including an insulated cavity configured to store food and beverages; a vapor cycle system disposed in the housing, the vapor cycle system operative to cool the food and beverages in the insulated cavity; a plurality of sensors disposed in the housing, the plurality of sensors in communication with the vapor cycle system and outputting data relative to the vapor cycle system; and a controller, according to the data from the plurality of sensors, determining an occurrence of an event and outputting control signals to the vapor cycle system, and wherein the controller logs the data to a data structure according to a first data-logging mode, and to the data structure according to a second data-logging mode upon occurrence of the event. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A diagnostic method for a refrigeration unit including a plurality of sensors and a controller, the method comprising:
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the controller, receiving data from the plurality of sensors; the controller, determining an occurrence of an event relative to the data received from the plurality of sensors; if an event has not occurred, the controller, storing the data to a data structure according to a first data-logging mode; and if an event has occurred, the controller, storing the data to the data structure according to a second data-logging mode different from the first data-logging mode. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A refrigeration line replaceable unit (LRU) for an aircraft galley, the refrigeration LRU comprising:
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a housing including an insulated cavity configured to store food and beverages; a door coupled with the housing for movement between an open orientation for accessing the food and beverages and a closed orientation for sealing the food and beverages in the insulated cavity; a door sensor detecting the open orientation and outputting a door signal relative to the open orientation; a vapor cycle system operative to cool the food and beverages in the insulated cavity; a plurality of sensors in communication with the vapor cycle system, the plurality of sensors outputting at least temperature and pressure data relative to the vapor cycle system; and a controller, according to the door signal and the at least temperature and pressure data, determining an occurrence of an event and outputting control signals to the vapor cycle system, and wherein the controller logs the at least temperature and pressure data to a data structure at a first rate, and to the data structure at a second rate upon occurrence of the event. - View Dependent Claims (20, 21, 22, 23)
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24. A diagnostic method for a refrigeration unit including a plurality of sensors and a controller, the method comprising:
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the controller, operating in a normal data-logging mode; the controller, receiving data from the plurality of sensors; the controller, determining an occurrence of at least one of a warning event, a fault event and an informational event relative to the data received from the plurality of sensors; according to the determining step, if the warning event has occurred, the controller operating in a warning data-logging mode different from the normal data-logging mode; according to the determining step, if the fault event has occurred, the controller operating in a fault data-logging mode different from the normal data-logging mode; according to the determining step, if the informational event has occurred, the controller operating in an informational data-logging mode different from the normal data-logging mode; and if an event has occurred, the controller, storing the data to the data structure according to a second data-logging mode different from the first data-logging mode. - View Dependent Claims (25, 26, 27)
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Specification