Claims
- 1. A device for controlling the flow of a fluid in a conduit both a first and second direction comprising:
- an elongated body having a first end wall and a second end wall defining an internal chamber therebetween;
- the first end wall having at least one bypass opening axially extending therethrough and in communication with the internal chamber;
- the second end wall having a first metering orifice axially extending therethrough;
- a foreshortened piston disposed in the internal chamber and being slidably movable axially in response to fluid flow, the piston having a first end face parallel to the first end wall and a second end face parallel to the second end wall;
- a rod portion extending from the second end face slidably disposed within the first metering orifice;
- the piston and rod portion further having a second metering orifice extending therethrough and in axial alignment with the first metering orifice;
- whereby the piston meters flow-through the second metering orifice in a first fluid flow direction and meters flow serially through the first orifice and thence the second orifice in a second fluid flow direction and permits the fluid to flow into the conduit.
- 2. The device as set forth in claim 1 wherein the first and second end walls are disposed within the conduit.
- 3. A reversible vapor compression air conditioning system having a compressor, a first heat exchanger and a second heat exchanger being selectively connected to the compressor, switching means for selectively connecting the inlet and discharge side of the compressor between the exchanger and a refrigerant supply line for delivering refrigerant from one exchanger to the other, comprising:
- a flow control device mounted in the supply line between each exchanger having an elongated body having a first end wall and a second end wall defining an internal chamber therebetween;
- the first end wall having at least one bypass opening axially extending therethrough and in communication with the internal chamber;
- the second end wall having a first metering orifice axially extending therethrough;
- a foreshortened piston disposed in the internal chamber and being slidably movable axially in response to fluid flow, the piston having a first end face parallel to the first end wall and a second end face parallel to the second end wall;
- a rod portion extending from the second end face slidably disposed within the first metering orifice;
- the piston and rod portion further having a second metering orifice extending therethrough and in axial alignment with the first metering orifice;
- whereby the piston meters flow through the second metering orifice in a first fluid flow direction and meters flow serially through the first orifice and thence second orifice in a second fluid flow direction and permits the fluid to flow into the supply line.
- 4. A reversible vapor compression air conditioning system as set forth in claim 3 wherein the supply line comprises the elongated body.
Parent Case Info
This application is a continuation-in-part of prior application Ser. No. 08/758,131, filed Nov. 25, 1996, now abondoned, and names inventors named in the prior application.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4653291 |
Moeller et al. |
Mar 1987 |
|
5341656 |
Rust, Jr. et al. |
Aug 1994 |
|
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
758131 |
Nov 1996 |
|