Compressor motor control

A technology for compressors and compressor loads, which is applied to compressors, irreversible cycle compressors, refrigerators, etc., and can solve problems such as extension, food damage, and occupant discomfort

Inactive Publication Date: 2010-03-31
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, when little or no cooling is provided, periods of higher than expected temperature conditions can be prolonged, resulting in discomfort for the occupants of the climate controlled environment or damage to food in the refrigerated container

Method used

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  • Compressor motor control
  • Compressor motor control
  • Compressor motor control

Examples

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Embodiment Construction

[0014] figure 1 A refrigeration circuit is schematically disclosed in which a compressor 11 , a condenser 12 , an expansion device 13 and an evaporator 14 are connected in a typical serial refrigerant flow relationship. Condenser 12 is positioned such that condenser fan 16 conveys ambient air across there in order to desuperheat, condense, and then subcool the refrigerant vapor received from compressor 11 . It is known that the condenser 12 of the subcritical cycle becomes a gas cooler for trans-critical applications in which it operates at the critical point of the refrigerant. The evaporator 14 is positioned to receive air returning from the conditioned space, possibly mixed with a portion of the fresh air, to be cooled again and used by the evaporator fan 17 to deliver the cooled air to the climate controlled environment. The refrigerant is evaporated and generally superheated in the evaporator 14 . although figure 1 A basic refrigeration system arrangement is described,...

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Abstract

A compressor, which is susceptible to protective shutdowns when certain operating conditions are sensed, includes a control feature wherein, when the compressor is restarted after a period of time, itmay be caused to operate in an unloaded mode such that a reoccurrence of the shutdowns is less likely.

Description

【Technical field】 [0001] The present invention relates generally to refrigeration systems, and more particularly to selectively unloading compressors of refrigeration systems. 【Background technique】 [0002] Air conditioning and refrigeration systems often include protection mechanisms that detect when the compressor is overloaded. When such a condition is detected, the compressor is usually shut down for a period of time and then usually restarted after shutting down. In some cases, when a compressor detects a catastrophic failure, the compressor will not restart until the operator, technician or maintenance personnel identify the source of such failure. Typically, the protection mechanism is related to the measurement of the current in the motor and / or the temperature of the motor, or to the direct effect of these parameters on the protection device, such as an electric motor line interruption occurring in response thereto. [0003] This condition typically occurs in hot...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/00F25B49/00F25B1/00
CPCF25B2400/13F25B2600/2515Y02B30/741F25B2600/0253F25B2600/2509F25B2700/21156F25B49/022F25B41/043F25B2500/08F25B2700/151F25B2600/026F25B49/005Y02B30/70F25B41/22
Inventor A·利夫森M·F·塔拉斯
Owner CARRIER CORP
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