Ring weld blocker in discharge check valve

Patent metadata

Field	Value
Publication number	US-10626870-B2
Application number	US-201514736976-A
Country	US
Kind code	B2
Filing date	Jun 11, 2015
Priority date	Jun 11, 2015
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A discharge check valve assembly for a compressor having a discharge opening. The discharge check valve assembly includes a valve body adapted to be positioned at the discharge opening of the compressor. A discharge tube is assembled to the valve body, and a check valve member is disposed in the valve body. In certain embodiments, the check valve member is biased in a closed position by a biasing spring. A weld block member is positioned at an interface between the valve body and the discharge tube, and a first weld couples the discharge tube and the valve body at a first weld point.

First claim

What is claimed is:

1. A discharge check valve assembly for a compressor having a discharge opening, the discharge check valve assembly comprising:
a valve body adapted to be positioned at the discharge opening of the compressor, wherein the valve body is tubular with an interior surface and has a radially inwardly extending wall at an open inlet end of the valve body, the radially inwardly extending wall forming a valve seat;
a discharge tube assembled to the valve body, the discharge tube configured to be disposed outside of the compressor;
a check valve member disposed in the valve body;
a spring, biasing the valve in a closed position;
a weld block member positioned at an interface between the valve body and the discharge tube;
a spring retainer holding the biasing spring in the valve body, the spring retainer located between the radially inwardly extending wall and the weld block member; and
a first weld coupling the discharge tube and the valve body at a first weld point.

2. The discharge check valve assembly of claim 1 , wherein the weld block member acts as a seat for the spring retainer.

3. The discharge check valve assembly of claim 1 , wherein the weld block member is a snap ring disposed in an annular groove in the interior surface.

4. The discharge check valve assembly of claim 3 , wherein the weld block member holds the biasing spring, spring retainer, and valve member inside the valve body.

5. The discharge check valve assembly of claim 1 , wherein the discharge tube abuts the weld block member.

6. The discharge check valve assembly of claim 5 , wherein the weld block member holds the biasing spring, spring retainer, and valve member inside the valve body.

7. The discharge check valve assembly of claim 6 , wherein the weld block member acts as a seat for the spring retainer.

8. A scroll compressor including the discharge check valve assembly of claim 1 , the scroll compressor comprising:
a housing comprising a cylindrical shell section arranged about an axis that is vertically extending;
scroll compressor bodies in the housing having respective bases and respective scroll ribs that project from the respective bases and which mutually engage for compressing fluid;
an electrical motor having a stator and a rotor; and
a drive shaft for rotation, the rotor acting upon the drive shaft that in turn acts upon the scroll compressor bodies to facilitate relative orbiting movement between the scroll compressor bodies;
wherein the discharge check valve assembly is welded to the scroll compressor housing at a second weld point.

9. The scroll compressor of claim 8 , wherein the first weld point is spaced apart from the second weld point.

10. The discharge check valve assembly of claim 1 , wherein the weld block member is annular.

11. The discharge check valve assembly of claim 1 , wherein the weld block member is made from steel.

12. A discharge check valve assembly for a compressor having a discharge opening, the discharge check valve assembly comprising:
a valve body adapted to be positioned at the discharge opening of the compressor, wherein the valve body is tubular with an interior surface and has a radially inwardly extending wall at an open inlet end of the valve body, the radially inwardly extending wall forming a valve seat;
a discharge tube attached to the valve body;
a check valve member disposed within the valve body;
a weld block member affixed to the interior surface of the valve body;
a biasing spring and a spring retainer to secure the biasing spring within the valve body; and
the weld block member arranged to hold the spring retainer within the valve body, wherein the spring retainer is sandwiched between the weld block member and the radially inwardly extending wall.

13. The discharge check valve assembly of claim 12 , further comprising a first weld that couples the discharge tube and the valve body at a first weld point.

14. The discharge check valve assembly of claim 12 , wherein the discharge check valve assembly is welded to the compressor housing at a second weld point spaced apart from the first weld point.

15. The discharge check valve assembly of claim 12 , wherein the weld block member acts as a seat for the spring retainer.

16. The discharge check valve assembly of claim 12 , wherein the weld block member is a snap ring disposed in an annular groove in the interior surface of the valve body.

17. The discharge check valve assembly of claim 12 , wherein the weld block member holds the biasing spring, spring retainer, and valve member inside the valve body.

18. The discharge check valve assembly of claim 12 , wherein the weld block member abuts the discharge tube and serves as a seat for the discharge tube during assembly.

19. A method of manufacturing a scroll compressor comprising the steps of:
welding a valve body into a refrigerant outlet port of a scroll compressor, wherein the valve body is tubular with an interior surface having a radially inwardly extending wall at an open inlet end of the valve body, the radially inwardly extending wall forming a valve seat;
assembling a valve member, a biasing spring, and a spring retainer into the valve body;
assembling a weld block member at an outlet end of the valve body such that the spring retainer is located between the radially inwardly extending wall and the weld block member, the weld block member prevents weld material from entering the valve body and acts to retain the valve member, biasing spring, and spring retainer in their final position in valve body prior to welding a discharge tube; and
welding the discharge tube to the valve body.

20. The method of claim 19 , wherein assembling a weld block member at an outlet end of the valve body comprises assembling a snap ring into an annular groove at an outlet end of the valve body.

21. The method of claim 19 , wherein assembling a weld block member at an outlet end of the valve body comprises assembling a weld block member that is a seat for the spring retainer.

22. The method of claim 19 , further comprising seating the discharge tube against the weld block member prior to welding the discharge tube to the valve body.

23. The method of claim 19 , wherein the valve member, the biasing spring, and the spring retainer are assembled into the valve body from outside of the scroll compressor.

24. The discharge check valve assembly of claim 12 , wherein the valve seat defines an inlet opening and the valve body defines an outlet opening at an outlet end of the valve body, the outlet opening being larger than the inlet opening such that assembly of the valve member, the biasing spring, and the spring retainer into the valve body from outside of the compressor is facilitated.

Assignees

• Bessel Kurt William Robert
• Duppert Ronald J
• Lynch Todd M
• Bitzer Kuehlmaschinenbau Gmbh

Inventors

• Bessel Kurt William Robert
• Duppert Ronald J
• Lynch Todd M

Classifications

• F04C18/0253

  Details concerning the base · CPC title

• F16K15/028

  the valve member consisting only of a predominantly disc-shaped flat element · CPC title

• F16K27/0209

  Check valves or pivoted valves · CPC title

• F04C29/124 Primary

  with inlet and outlet valves specially adapted for rotary or oscillating piston pumps · CPC title

• F04C2230/231

  by welding · CPC title