To provide an air conditioner for railway vehicle capable of maintaining reliability even when a mechanism which temporarily changes a circulation mode of a refrigeration cycle so as to clean a surface of a heat exchanger as an object of frosting cleaning through intentional frosting or freezing and thawing is added to the heat exchanger.SOLUTION: There is provided an air conditioner for railway vehicle that comprises cycles of a heat pump, and that comprises a compressor, an indoor heat exchanger, an outdoor heat exchanger, and first decompressing means, where the compressor, the indoor heat exchanger, the outdoor heat exchanger, and the first decompression means form a cycle from a start end to a terminal end in one path, second decompression means is provided for a flow passage different from the cycle, and the second decompression means is placed in operation to frost an object heat exchanger as an object of cleaning. the compressor makes a choice between a state of operation at a predetermined rotating speed and a stop state. Further, the first decompression means is composed of a thin-diameter pipe.SELECTED DRAWING: Figure 1

    【課題】 着霜洗浄の対象となる熱交換器に対し、その表面に意図的な着霜又は凍結及び解凍して清浄にするため、冷凍サイクルの流通形態を一時的に変更する機構が追加されても、信頼性を維持できる鉄道車両用空調装置を提供する。【解決手段】 ヒートポンプのサイクルを備えた鉄道車両用空調装置であって、圧縮機と、室内熱交換器と、室外熱交換器と、第1の減圧手段と、を備え、圧縮機と室内熱交換器と室外熱交換器と第1の減圧手段は、始端から終端までを一経路でサイクルを形成し、そのサイクルとは別の流路に第2の減圧手段を設け、その第2の減圧手段を動作させることにより、洗浄対象とする対象熱交換器に着霜させる。また、圧縮機の運転状態は、所定の回転速度による運転状態と、停止状態と、の二者択一である。また、第1の減圧手段は細径管により構成する。【選択図】 図1


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    Title :

    AIR CONDITIONER FOR RAILWAY VEHICLE


    Additional title:

    鉄道車両用空調装置


    Contributors:

    Publication date :

    2022-08-23


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    F24F Klimatisierung , AIR-CONDITIONING / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES / F25B Kältemaschinen, Kälteanlagen oder Kälteverfahren , REFRIGERATION MACHINES, PLANTS, OR SYSTEMS



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