Compressor and method for controlling volume ratio of compressor

A compressor and volume ratio technology, which is applied in the direction of machines/engines, mechanical equipment, liquid fuel engines, etc., can solve problems such as system loss, excessive gas compression, and exhaust port backflow, so as to improve energy efficiency levels and improve compressor efficiency , the effect of good part load performance

Active Publication Date: 2016-03-23
JOHNSON CONTROLS TYCO IP HLDG LLP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the internal pressure exceeds the discharge pressure, it will cause excessive compression of the gas and cause system losses
If the cavity or internal pressure is too low, backflow can occur when the vent opens, creating another type of system loss

Method used

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  • Compressor and method for controlling volume ratio of compressor
  • Compressor and method for controlling volume ratio of compressor
  • Compressor and method for controlling volume ratio of compressor

Examples

Experimental program
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Embodiment Construction

[0036] figure 1 Shown is an exemplary environment for a heating, ventilation, and air conditioning (HVAC) system 10 in a building 12 used in a typical commercial setting. System 10 may include a vapor compression system 14 that may provide cooling fluid that may be used to cool building 12 . System 10 may include a boiler 16 that provides heated liquid that may be used to heat building 12 , and an air distribution system that circulates air through building 12 . The air distribution system may also include an air return duct 18 , an air supply duct 20 and an air handler 22 . Air handler 22 may include a heat exchanger connected to boiler 16 and vapor compression system 14 via conduit 24 . The heat exchanger in air handler 22 may receive heated liquid from boiler 16 or cool liquid from vapor compression system 14 , depending on the mode of operation of system 10 . The system 10 is shown with individual air handlers on each floor of the building 12, but it should be understo...

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PUM

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Abstract

A system and method for controlling the volume ratio of a compressor is provided. The system may use port (88) or multiple such ports in the rotor cylinder to direct vapor from the compression chamber to the discharge passage of the compressor. A control valve (90) may be used to open or close the port or ports to achieve different volume ratios within the compressor. The control valve (90) may be moved or adjusted by one or more valves that control fluid flow to the valve. A control algorithm may be used to control the one or more valves to move the control valves to achieve different volume ratios of the compressor. The control algorithm may control the one or more valves in response to operating parameters associated with the compressor.

Description

[0001] Cross References to Related Applications [0002] This application claims priority and benefit to U.S. Provisional Application No. 61 / 382,849, filed September 14, 2010, entitled "VOLUMERATIO CONTROL SYSTEM AND METHOD," which is incorporated by reference way incorporated into this article. technical field [0003] The present invention generally relates to positive displacement compressors. More precisely, the invention relates to the control of the volume ratio of screw compressors. Background technique [0004] In a rotary screw compressor, intake and compression may be accomplished by two closely meshing, rotating rotors with helical projections that alternately draw gas onto the threads and compress the gas to higher pressure. Screw compressors are positive displacement devices with an intake and compression cycle, similar to piston / reciprocating compressors. The rotors of screw compressors may be seated in close fitting bores with built-in geometric features ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04C28/12F04C28/26
CPCF04C18/16F04C28/125F04C28/26F04C28/12F04C2/18
Inventor W·L·卡普卡小P·奈米特A·M·康斯托克
Owner JOHNSON CONTROLS TYCO IP HLDG LLP
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