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System and method for controlling an economizer circuit

A technology of economizer and controller, applied to the container and compressor in the circuit of the device, measuring, comparing the measured liquid level with the predetermined liquid level, to achieve the effect of low cost and improving the reliability of the compressor

Active Publication Date: 2015-07-01
JOHNSON CONTROLS TYCO IP HLDG LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The problem is that for a given condensing temperature, reducing the frequency of the voltage applied to the compressor motor does not reduce the motor current

Method used

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  • System and method for controlling an economizer circuit
  • System and method for controlling an economizer circuit
  • System and method for controlling an economizer circuit

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Embodiment Construction

[0035] figure 1 Shown is a vapor compression system that may incorporate the economizer port valve control systems and methods described in this application. Such as figure 1 As shown, heating, ventilation, and air conditioning (HVAC), refrigeration, or liquid freezing system 100 includes compressor 102 , condenser 104 , expansion device 105 , liquid freezer or evaporator 106 , and control panel or controller 108 . Compressor 102 may be driven by an electric motor 124 powered by a variable speed drive (VSD) 122 . in addition, figure 1 The system 100 shown in may have an economizer circuit comprising a flash tank 110 , an inlet line 112 , an economizer expansion valve 114 , a first outlet line 116 , a second outlet line 118 and a port valve 120 .

[0036] VSD 122 receives AC power from an AC source with a specific fixed line voltage and fixed line frequency and provides AC power to motor 124 at a desired voltage and frequency, both of which can be varied to meet specific ...

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PUM

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Abstract

A system and method for controlling an economizer circuit is provided. The economizer circuit includes a valve to regulate refrigerant flow between the economizer and the compressor. The valve can be opened to engage the economizer circuit or closed to disengage the economizer circuit based on the output frequency provided to the compressor motor by a variable speed drive and an operating condition of the economizer.

Description

[0001] Cross References to Related Applications [0002] This application claims priority over U.S. Provisional Application No. 61 / 382,858, filed September 14, 2010, entitled "SYSTEM AND METHOD FOR CONTROLLING AN ECONOMIZER CIRCUIT" right and interest, said application is incorporated herein by reference. Background technique [0003] The present application generally relates to controlling an economizer circuit in a vapor compression system. More specifically, this application relates to controlling an economizer circuit of a vapor compression system by controlling a valve used in an economizer port of a compressor. [0004] In vapor compression systems such as refrigeration and refrigeration systems, refrigerant gas is compressed by a compressor and then sent to a condenser. The refrigerant vapor delivered to the condenser is in heat exchange relationship with a fluid such as air or water, thereby undergoing a phase change to become a refrigerant liquid. Liquid refrigera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B41/00F25B49/02
CPCF25B2600/01F25B2400/13F25B2700/21156F25B2700/2106F25B2600/2509F25B2700/04F25B1/06F25B49/025A63B57/00F25B2600/02F25B41/00F25B1/10F25B2400/23F25B2700/151F25B2700/171F25B2700/1931F25B2700/2101F25B2700/21152F25B2700/21173F25B41/39F25B49/022
Inventor W·L·科普科A·J·格雷比尔G·E·尼克I·费德曼S·库兰卡拉
Owner JOHNSON CONTROLS TYCO IP HLDG LLP
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