Hermetically sealed compressors

• US 6,524,080 B2
• Filed: 04/06/2001
• Issued: 02/25/2003
• Est. Priority Date: 04/11/2000
• Status: Expired due to Term

• Current Assignee: Kirloskar Copeland Ltd. (Emerson Electric Company)
• Original Assignee: R K Dewan & Company
• Inventors: Chintamani, Chouthai Atul, Afzal, Pasha Mohammed
• Primary Examiner(s): Freay, Charles G.
• Assistant Examiner(s): Liu, Han L.
• Application Number:
  US09/828,383
• Publication Number:
  US 20010031208A1
• Time in Patent Office: 690 Days
• Field of Search: 417/312, 417/415, 417/902, 181/229, 181/249, 181/403, 181/255, 181/212
• US Class Current: 417/312
• CPC Class Codes: F02M 35/10321 Plastics; Composites; Rubbers
• CPC Class Codes: F02M 35/12 Intake silencers ; Sound modulation, transmission or amplification intake silencers also used as exhaust silencer F01N13/007; filters for compressors F04B39/16
• CPC Class Codes: F02M 35/1216 by using a plurality of holes, slits, protrusions, perforations, ribs or the like; Surface structures; Turbulence generators
• CPC Class Codes: F04B 39/0061 using muffler volumes
• CPC Class Codes: Y10S 417/902 Hermetically sealed motor pump unit

Abstract

A suction muffler for a hermetic sealed reciprocating compressor which comprises (i) a muffling chamber having a body of a synthetic polymeric material and (ii) a synthetic polymeric perforated tube passing through the muffling chamber carrying refrigerant fluid from the suction tube of the compressor to the suction port on the valve plate of a cylinder in which a piston reciprocates. The muffling tube may be made divergent along at least 10% of its length. The muffler is mounted directly in the cylinder head by means of a tongue and slot formation avoiding the need for a suction plenum between the suction muffler and the valve plate inlet.

Claims

1. A suction muffler for a hermetic sealed reciprocating compressor comprising (i) a muffling chamber having a body of a synthetic polymeric material and (ii) a synthetic polymeric perforated tube passing through the muffling chamber carrying refrigerant fluid from a suction tube of a compressor to a suction port on a valve plate of a cylinder in which a piston reciprocates the perforated tube having a projection tongue near its outlet end for mounting the muffler in a complementary slot formed in a cylinder head such that a muffler outlet is in fluid tight communication with the suction port of the valve plate.

2. A suction muffler for a hermetic reciprocating compressor as claimed in claim 1, in which a diameter of the perforated tube varies from 0.1″

to 1″

.

3. A suction muffler for a hermetic reciprocating compressor as claimed in claim 1, in which the number of perforations in the perforated tube vary from 4 to 120.

4. A suction muffler for a hermitically sealed compressor as claimed in claim 1, in which a diameter of the perforations of the perforated tube vary from 0.01 to 0.25.

5. A suction muffler for a hermetically sealed compressor as claimed in claim 1, in which a drain hole is provided at the bottom of the muffler chamber to drain lubricating oil present along with refrigerant fluid flowing through the muffler.

6. A suction muffler for a hermetically sealed compressor as claimed in claim 1, in which the perforated tube diverges at least 10 per cent along its length from its inlet to its outlet.

7. A suction muffler for a hermetically sealed compressor as claimed in claim 1, in which the perforated tube and the muffling chamber are integrally molded as two separate halves joined together by bonding or ultrasonic welding.

8. A method of mounting a muffler directly in a cylinder head of a hermetically sealed compressor comprising the steps of:

{i} forming a projection tongue on a muffler tube;

{ii} forming a slot a cylinder head complementary to the projection formed on the muffler tube; and

{iii} mounting the muffler in the cylinder head by press fitting the projection on the muffler tube into the slot in the cylinder head.

9. A hermetically sealed compressor which comprises a motor compressor assembly mounted in a shell which includes a cylinder head and a muffler in which the muffler is fitted to the cylinder head by means of a male projection formed on a muffler tube and a complementary slot formation provided in the cylinder head and clamped over by the pressure of a valve plate bearing upon it.