US 8,783,059 B2Granted

Refrigerating air-conditioning apparatus

AssigneeMitsubishi Electric Corporation

InventorsMasaki Toyoshima, Susumu Yoshimura, Shinichi Wakamoto, Osamu Morimoto

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Abstract

A refrigerating air-conditioning apparatus, at least provided with no possibility that a foreign material returns to a compressor from an accumulator at a time of the pipeline-cleaning operation firstly, and provided with a possibility to perform a collecting operation for the foreign material in a short time secondary, is provided. The heat-source side unit includes an accumulator provided with a function to separate and collect the foreign material in an existing pipeline, a collecting container for collecting the foreign material separated by the accumulator, and an oil return pipeline for returning refrigerating machine oil to the compressor via a flow amount adjusting device, installed at a lower portion of the accumulator, and at a time of ordinary cooling or heating operation, the refrigerating machine oil is caused to flow into the oil return pipeline, and at a time of pipeline cleaning and foreign material-collecting operations, the flow amount adjusting device is fully closed.

Claims8

Dependent claims

A refrigerating air-conditioning apparatus constructed by connecting a heat-source side unit and a load-side unit by an existing refrigerant pipeline,

wherein the heat-source side unit comprises a compressor, a four-way valve that changes a direction of a flow of refrigerant discharged from the compressor, an accumulator provided in a low-pressure side main refrigerant circuit pipeline from the four-way valve to a suction side of the compressor, the accumulator having a function to separate and collect a foreign material in an existing pipeline, and a collecting container for collecting the foreign material separated by the accumulator,
wherein an inlet-side refrigerant pipeline of the accumulator, which is in the low-pressure side main refrigerant circuit pipeline from the four-way valve to the suction side of the compressor, and the collecting container, are connected by a degassing pipe, and
a portion where the degassing pipe is connected to the low-pressure side main refrigerant circuit pipeline has an inner diameter being throttled to have a diameter less than a diameter of front and rear portions thereof.

Dependencies are inferred from the claim text.

Facts

Application: 13/219,315Filed 26 Aug 2011 · division
Priority: JP 2005-2936436 Oct 2005
Published: US 2011/0308272 A122 Dec 2011
Granted: 22 Jul 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

F25B 43/006
Arrangements for separating or purifying gases or liquids ; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat: accumulators
F25B 31/004
Lubrication: oil recirculating arrangements
F25B 13/00
Compression machines, plants or systems, with reversible cycle
F25B 47/00
Arrangements for preventing or removing deposits or corrosion, not provided for in

Family

PCT/JP2006/309300Parent of this division · filed 9 May 2006
US 2011/0308272 A1Pre-grant publication · published 22 Dec 2011
Application11/922,503Parent of this division
US 2009/0133435 A1Published application
US 8,783,059 B2This patent

From the US filing history. Foreign family members aren’t listed.

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