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Slide valve with hot gas bypass port

A sliding valve and fluid technology, applied in the field of compressors, can solve problems such as reducing the amount of refrigerant

Active Publication Date: 2012-10-03
CARRIER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

All of these methods reduce the amount of refrigerant cycled through an evaporative compression system with varying levels of efficiency

Method used

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  • Slide valve with hot gas bypass port
  • Slide valve with hot gas bypass port
  • Slide valve with hot gas bypass port

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0023] figure 1 An evaporative compression system 100 is shown, such as an air conditioning system, including a compressor 10 that compresses a fluid, such as refrigerant, and delivers the refrigerant down to a condenser 102 . In the condenser 102, the refrigerant rejects heat to an external fluid medium, such as air or water. The refrigerant travels to expansion device 106 and is expanded to a low pressure. The refrigerant receives heat from another fluid medium of the evaporator 108 . The refrigerant then flows to the compressor 10, completing the cycle.

[0024] The storage capacity control mechanism 112 is connected to the compressor 10 . The capacity control mechanism controls the position of the slide valve 24 within the compressor 10 . The capacity control mechanism 112 adjusts a piston connected to the spool valve 24 to control the position of the spool valve.

[0025] figure 2 A compressor 10 is indicat...

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PUM

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Abstract

A compressor includes a slide valve (24) having a passage that can be in fluid communication with a discharge plenum (22) and a suction plenum (20). The slide valve (24) position may be axially adjusted to control an amount of refrigerant that is compressed between a male rotor (14) and a female rotor (12) in the compressor based upon a system control scheme that determines capacity demand. The passage (28) is in fluid communication with the discharge plenum (22) and the suction plenum (20) when the slide valve is in a fully unloaded position or a partially unloaded position. A compressor housing blocks an opening to the passage when the slide valve (24) is in a fully loaded position. The location of the opening (36) in the slide valve determines what point in axial travel of the slide valve that fluid bypass begins.

Description

Background of the invention [0001] The present invention relates to a compressor comprising a slide valve with a hot gas bypass built into the slide valve. [0002] Compressors and the evaporative compression system in which they are installed must be capable of operating at their full capacity and at some reduced capacity depending on the application and surroundings (ie outdoor temperature, temperature of the cooled medium, and volume / flow rate of the cooled medium). It may be desirable to have a compressor / system that can operate continuously at the smallest possible percentage of full load capacity to avoid on / off cycling of the compressor / system and to avoid temperature fluctuations of the cooled medium caused by on / off cycling. [0003] Due to the need to operate at less than full load capacity some of the time, compressors must have a means of varying the amount of refrigerant they compress. In many instances, screw compressors use slide valves as their unloading mecha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F03C2/00F04C18/00F04B23/00
CPCF04C28/12F04C18/16
Inventor F·P·威尔逊S·L·索尔德斯
Owner CARRIER CORP