Variable refrigerant expansion device with pressure relief

Variable refrigerant expansion device with pressure relief

  • CN 101,586,895 A
  • Filed: 05/22/2009
  • Published: 11/25/2009
  • Est. Priority Date: 05/22/2008
  • Status: Active Application
First Claim
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1. refrigerant expansion assembly that is used for vehicle air conditioner comprises:

  • The aperture inlet port is configured to receive cold-producing medium from condenser;

    Port is drawn in the aperture, is configured to carry described cold-producing medium to evaporimeter;

    Orifice passage, described orifice passage is connected to described aperture with described aperture inlet port and draws port, and comprises valve seat;

    The variable orifice assembly, described variable orifice assembly is installed in the described orifice passage, be included in the described orifice passage variable orifice main body in axial sliding, described variable orifice main body comprises and the salable sealing flange that engages of described valve seat, from the upstream variable orifice path that described sealing flange upstream extends, from the downstream variable orifice path that described sealing flange extends downstream, and extend axially fixed orifice path by described variable orifice main body, described variable orifice assembly comprises the aperture spring, and described aperture spring is configured to described sealing flange is biased into described valve seat and engages;

    The upstream bypass channel, described upstream bypass channel extends from described orifice passage in described variable orifice assembly upstream, and comprises ball seat;

    The downstream bypass channel, described downstream bypass channel extends from described orifice passage in described variable orifice assembly downstream;

    Bypass chamber, described bypass chamber is connected to described downstream bypass channel with described upstream bypass channel;

    Check ball, described check ball are installed in the described bypass chamber and with described ball seat is salable and engage;

    AndThe bypass spring, described bypass spring operationally engages described check ball is biased into and described ball seat sealed engagement with described check ball.

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