Heating, ventilating, air conditioning, and refrigeration noise reduction system

Abstract

Embodiments of a noise reduction system for use in heating, ventilating, air conditioning, and refrigeration (HVACR) systems are provided. The noise reduction system may include a barrier to be placed over an air inlet of an HVACR base unit. The barrier, consisting of two rows of equally spaced structures, may permit the passage of air therethrough while preventing the escape of noise from the base unit. The noise reduction system may also include one or more resonance chambers placed atop the base unit and a structure placed adjacent the base unit. Noise coming from the base unit may be redirected by the structure toward the resonance chambers, which are configured to attenuate the noise.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a Non-Provisional Patent Application of U.S. Provisional Patent Application No. 61 / 409,816, entitled “Noise Reduction Methods for Modular Heating, Ventilating, Air Conditioning, and Refrigeration Systems”, filed Nov. 3, 2010, which is herein incorporated by reference.BACKGROUND[0002]The invention relates generally to heating, ventilation, air conditioning, and refrigeration (HVACR) systems, and, more particularly, to noise reduction methods for modular HVACR systems.[0003]HVACR systems are utilized for a variety of applications that require the temperature and quality of surrounding air to be regulated. For example, HVACR systems are utilized to provide ventilation, to filter air, and to maintain desirable pressure relationships for buildings, aircraft, and so forth. For further example, HVACR systems may be provided on a ground support equipment cart to serve aircraft parked at gates. As such, HVACR systems typically ...

AI Technical Summary

Benefits of technology

[0006]In an exemplary embodiment, an air conditioning noise reduction system includes a base unit with an air inlet on one surface and at least one fan in the unit. The at least one fan is used to draw air into the unit through the inlet and to output the air toward a downstream process. A barrier including two rows of spaced structures is placed over the inlet to allow passage of air through the barrier into the unit but to prevent noise caused by the fan from escaping the unit.

Problems solved by technology

HVACR systems may generate large amounts of noise, especially when driven at high airflow volume.

Such noise is generated primarily from refrigeration compressors, condenser fans, and the main system blower.

Such noise output to the surroundings may lead to an undesirable increase in noise pollution, and, therefore, it may be beneficial to apply appropriate noise reduction techniques to these systems.

Certain noise reduction techniques, however, may not be appropriate for use with HVACR systems.

This could create a pressure drop that negatively affects the performance of the main blower or the condenser fans.

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