Mounting arrangement for a suction muffler in a linear motor compressor

Patent metadata

Field	Value
Publication number	US-9353773-B2
Application number	US-201113988832-A
Country	US
Kind code	B2
Filing date	Nov 24, 2011
Priority date	Nov 24, 2010
Publication date	May 31, 2016
Grant date	May 31, 2016

Abstract

The mounting arrangement is applied to a compressor which comprises: a piston having a cylindrical tubular body; and an actuating means connected to the piston to drive the latter in a reciprocating movement. The suction muffler comprises two tubular inserts, longitudinally disposed in the interior of the piston and having spaced apart open adjacent ends, and closed opposite ends respectively affixed to the top wall of the piston and to the actuating means, and defining, in the interior of the piston, a muffling chamber (C) and an annular passage medianly opened to the muffling chamber (C) and communicating an open rear end of the piston with a suction valve provided in a top wall of said piston.

First claim

The invention claimed is:

1. A mounting arrangement for a suction muffler in a linear motor compressor of the type which comprises a movable assembly formed by: a piston having a cylindrical tubular body with an open rear end and a front end closed by a top wall which carries a suction valve; and an actuating means connected to the piston to drive the latter in a reciprocating movement, the mounting arrangement being characterized in that the piston houses, internally, a suction muffler comprising two tubular inserts longitudinally disposed in the interior of the piston, said tubular inserts having open adjacent ends spaced from each other and closed opposite ends respectively affixed to the top wall of the piston and to the actuating means, said tubular inserts defining, in the interior of the cylindrical tubular body of the piston, a muffling chamber (C) and an annular passage medianly opened to the muffling chamber (C), through the adjacent ends of the tubular inserts, and communicating the open rear end of the piston with its suction valve.

2. The mounting arrangement, as set forth in claim 1 , characterized in that the annular passage comprises a first annular passage portion defined by a radial spacing between a first of the tubular inserts, adjacent to the actuating means, and the cylindrical tubular body of the piston.

3. The mounting arrangement, as set forth in claim 2 , characterized in that the annular passage comprises a second annular passage portion defined by a radial spacing between a second of the tubular inserts, adjacent to the top wall of the piston, and the cylindrical tubular body of the piston.

4. The mounting arrangement, as set forth in claim 3 , characterized in that the muffling chamber (C) comprises a first chamber portion (C 1 ) defined in the interior of the first tubular insert and a second chamber portion (C 2 ) defined in the interior of the second tubular insert.

5. The mounting arrangement, as set forth in claim 2 , characterized in that a second of the tubular inserts comprises an external tubular wall and an internal tubular wall, radially spaced from each other, the annular passage comprising a second annular passage portion defined between said external tubular wall and internal tubular wall of the second tubular insert and having a first end opened to the muffling chamber (C) and a second end opened to the suction valve.

6. The mounting arrangement, as set forth in claim 5 , characterized in that the muffling chamber (C) comprises a first chamber portion (C 1 ) defined in the interior of the first tubular insert, a second chamber portion (C 2 ) defined in the interior of the internal tubular wall of the second tubular insert, around the rod, and a third chamber portion (C 3 ) defined by a radial spacing between the external tubular wall of the second tubular insert and the cylindrical tubular body of the piston and closed in its end turned to the top wall of the piston OK said chamber portions (C 1 , C 2 , C 3 ) being open in the adjacent ends of the tubular inserts.

7. The mounting arrangement, as set forth in claim 6 , characterized in that the third chamber portion (C 3 ) has its end, which is turned to the top wall of the piston, closed by an outer annular flange, incorporated to the external tubular wall and which is seated against the cylindrical tubular body of the piston.

8. The mounting arrangement, as set forth in claim 7 , characterized in that a first of the tubular inserts has its closed opposite end hermetically seated on and affixed to the actuating means.

9. The mounting arrangement, as set forth in claim 8 , characterized in that the closed opposite end of the first tubular insert presents an annular end edge, to be hermetically seated against a annular wall provided in the actuating means, and an inner thread portion to be engaged with a respective thread portion provided in the actuating means.

10. The mounting arrangement, as set forth in claim 9 , the compressor being provided with a rod internal to the piston and having a first end affixed to the piston, in the region of the top wall, and a second end affixed to the actuating means, the mounting arrangement being characterized in that the two tubular inserts, are disposed around the rod and have their closed opposite ends respectively affixed to the top wall of the piston by means of the first end of the rod, and to one of the parts defined by the second end of the rod and by the actuating means.

11. The mounting arrangement, as set forth in claim 10 , the first end of the rod being provided with an internally threaded axial hole retaining a respective end of a bolt, whose opposite end projects outwards from the rod, the top wall of the piston incorporating, in the interior of the body of the latter, a tubular hub, axially projecting and provided with an inner thread, in which is threaded the opposite end of the bolt, the piston being characterized in that a second of said tubular inserts has its closed opposite end hermetically compressed and retained between the tubular hub and the first end of the rod.

12. The mounting arrangement, as set forth in claim 11 , characterized in that the closed opposite end of said second tubular insert is compressed against at least one of said parts of tubular hub and first end of the rod, by an intermediary elastic element, surrounding the second end of the rod.

13. The mounting arrangement, as set forth in claim 12 , characterized in that the closed opposite end of said second tubular insert is defined by an end annular wall, presenting an inner peripheral region surrounding the first end of the rod, the intermediary elastic element and the inner peripheral region of the end annular wall being seated in the interior of a lowered circumferential portion provided at the first end of the rod and of tubular hub of the top wall.

14. The mounting arrangement, as set forth in claim 13 , characterized in that the intermediary elastic element comprises an elastic washer, disposed around the first end of the rod and against which is seated an end annular wall of the second tubular insert.

15. The mounting arrangement, as set forth in claim 13 , characterized in that the intermediary elastic element takes the form of a helical spring disposed around the first end of the rod and having an end seated against the end annular wall of the second tubular insert and the other end seated against a retaining elastic ring, fitted in a circumferential groove of the rod.

16. The mounting arrangement, as set forth in claim 15 , characterized in that the adjacent ends of the two tubular inserts are mutually confronting.

17. The mounting arrangement, as set forth in claim 4 , characterized in that the first tubular insert has its closed opposite end hermetically seated on and affixed to the actuating means.

18. The mounting arrangement, as set forth in claim 17 , characterized in that the closed opposite end of the first tubular insert presents an annular end edge, to be hermetically seated against a annular wall provided in the actuating means, and an inner thread portion to be engaged with a respective thread portion provided in the actuating means.

19. The mounting arrangement, as set forth in claim 18 , wherein the compressor is being provided with a rod internal to the piston and having a first end affixed to the piston, in the region of the top wall, and a second end affixed to the actuating means, the mounting arrangement being characterized in that the two tubular inserts, are disposed around the rod and have their closed opposite en

Assignees

• Lilie Dietmar Erich Bernhard
• Puff Rinaldo
• Whirlpool Sa

Inventors

• Lilie Dietmar Erich Bernhard
• Puff Rinaldo

Classifications

• F15B15/00 Primary

  Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith · CPC title

• F04B39/0072

  characterised by assembly or mounting · CPC title

• F04B39/0061 Primary

  using muffler volumes · CPC title

• F04B39/0016

  with valve arranged in the piston · CPC title

• F04B19/22

  of reciprocating-piston type · CPC title