Multi-channel heat exchanger with multi-stage expansion

a heat exchanger and expansion device technology, applied in indirect heat exchangers, lighting and heating apparatuses, refrigeration components, etc., can solve the problems of poor heat exchanger efficiency and lack of efficiency, and achieve the effect of increasing single and multiple pass heat exchanger efficiency and reducing maldistribution of refrigeran

Inactive Publication Date: 2010-02-18
DELPHI TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0009]It is an object of the present invention to reduce maldistribution of refrigerant in heat exchangers in MCHX, thereby increasing single and multiple pass heat exchanger efficiency.

Problems solved by technology

Failure or more commonly, lack of efficiency is a great concern with such systems.
Consequently, a portion of the fluid entering the evaporator is a vapor, resulting in poor heat exchanger efficiency.
This vapor problem is called maldistribution and is a common problem of heat exchangers that use parallel refrigerant paths.
Gravity and the difference in density of the vapor and liquid phases cause this problem.

Method used

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  • Multi-channel heat exchanger with multi-stage expansion
  • Multi-channel heat exchanger with multi-stage expansion
  • Multi-channel heat exchanger with multi-stage expansion

Examples

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Embodiment Construction

[0022]FIG. 1 illustrates a mini-channel heat exchanger generally represented by reference numeral 10. Heat exchanger 10 has an inlet manifold 15 and an outlet manifold 20. Connecting manifolds 15 and 20 are a series or plurality of mini- or micro-channel tubes 25 that form the main body of heat exchanger 10. Each mini- or micro-channel tube 25 is a very narrow tube that with other tubes form the main body of the heat exchanger 10 and transport refrigerant 30 during evaporation.

[0023]Inlet manifold 15 receives a refrigerant 30 that can be either a single or a two-phase refrigerant that flows through mini- or micro-channel tubes 25. Inlet manifold receives multi-expansion device 40 of the present invention. At least one or more multi-expansion devices 40 of the present invention can be inserted into manifold 15 to enhance pressure drop of refrigerant 30 to ensure an even distribution of refrigerant for mini-channel tubes 25. While FIG. 1 shows a single-pass configuration of a heat exc...

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PUM

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Abstract

An expansion device for a heat exchanger having a manifold and a plurality of mini- and or micro-channels. The expansion device has an outer element having a plurality of orifices therethrough that is received in the manifold, and an inner element telescopically received in the outer element having at least one orifice therethrough and being in fluid communication with the plurality of orifices. Fluid passing through the at least one orifice and through the plurality of orifices is expanded and reduced in pressure prior to entering the manifold.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to an expansion device for heat exchangers. More particularly, the present invention relates to an expansion device for mini- or micro-channel heat exchangers (MCHX) that provide pressure reductions and mixing through multiple orifices to improve heat exchanger efficiency.[0003]2. Description of Prior Art[0004]Refrigeration systems are well known in the art and ubiquitous in such industries as food service industry, chemical and automotive industry. On a larger scale, heat exchangers are required for office buildings and for residential purposes. Failure or more commonly, lack of efficiency is a great concern with such systems.[0005]Traditional refrigeration cycles, or air conditioners, include a compressor, a condenser, an expansion valve, an evaporator and a refrigerant whose evaporation creates the cool temperature. In some refrigeration systems, the evaporator is a series of parallel na...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25B41/06F28F9/02
CPCF25B39/028F25B41/06F28F2260/02F28F9/0246F28D2021/0071F25B41/39
Inventor GORBOUNOV, MIKHAIL B.JIANG, YIRONGSANGIOVANNI, JOSEPH J.BEAMER, HENRY
Owner DELPHI TECH INC
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