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(11) | EP 2 330 300 A1 |
(12) | EUROPEAN PATENT APPLICATION |
published in accordance with Art. 153(4) EPC |
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(54) | INJECTION PIPE |
(57) An injection pipe (17) that supplies a compressor (3) with a gas refrigerant subjected
to gas/liquid separation by a receiver, which separates the reduced-pressure refrigerant
into gas and liquid, or a gas refrigerant gasified by a heat exchanger, wherein a
muffler (19) having an inside diameter larger than the inside diameter of the injection
pipe (17) is provided at an end located at the compressor (3) side. This can reduce
pulsation caused by a refrigerant flowing back from the compressor, which can reduce
vibration and noise due to the pulsation, thereby preventing the pipe from being damaged
by the vibration. |
{Technical Field}
{Background Art}
{Citation List}
{Patent Literature}
{Summary of Invention}
{Technical Problem}
{Solution to Problem}
{Advantageous Effects of Invention}
{Brief Description of Drawings}
{Fig. 1} Fig. 1 is a schematic diagram showing the overall configuration of an air conditioner equipped with an injection pipe according to the present invention.
{Fig. 2} Fig. 2 is a side view of an air conditioner compressor to which an injection pipe according to a first embodiment of the present invention is connected.
{Fig. 3} Fig. 3 is a graph showing experimental results obtained by operating an air conditioner equipped with the injection pipe according to the first embodiment.
{Fig. 4} Fig. 4 is a graph showing the relationship between the inside diameter of a muffler provided at the injection pipe according to the present invention and the magnitude of pulsation caused by a refrigerant flowing back from the air conditioner compressor.
{Fig. 5} Fig. 5 is a side view of an air conditioner compressor to which an injection pipe according to a second embodiment of the present invention is connected.
{Fig. 6} Fig. 6 is a schematic diagram showing the overall configuration of another air conditioner equipped with the injection pipe according to the present invention.
{Description of Embodiments}
{Reference Signs List}
REFERENCES CITED IN THE DESCRIPTION
Patent documents cited in the description