Hermetic compressor and refrigeration apparatus

Patent metadata

Field	Value
Publication number	US-10167860-B2
Application number	US-201314423955-A
Country	US
Kind code	B2
Filing date	Dec 13, 2013
Priority date	Dec 13, 2012
Publication date	Jan 1, 2019
Grant date	Jan 1, 2019

Abstract

A communication pipe outlet ( 263 ) of a suction muffler ( 26 ) included in a hermetic compressor ( 10 ) includes a communication opening ( 264 ). An upper shape ( 264 a ) of the communication opening ( 264 ) is a curved protruding shape, and a lower shape ( 264 b ) of the communication opening ( 264 ) is a rectangular shape. A suction hole ( 33 ) of a valve plate ( 30 ) included in the hermetic compressor ( 10 ) is formed such that the cylinder side of the suction hole ( 33 ) has a non-recessed closed-curve shape, and the communication pipe side of the suction hole ( 33 ) has a shape similar to that of the communication opening ( 264 ). The valve plate ( 30 ) and a communication pipe ( 262 ) are connected in a state where an upper peripheral surface of the communication opening ( 264 ) of the communication pipe outlet ( 263 ) corresponds to an upper peripheral surface of the suction hole ( 33 ).

First claim

The invention claimed is:

1. A hermetic compressor comprising:
a sealed container storing a lubricating oil;
an electric element housed in the sealed container; and
a compression element housed in the sealed container and driven by the electric element to compress a cooling medium, wherein
the compression element includes:
a cylinder, which forms a compression chamber;
a valve plate, which seals one end portion of the cylinder and in which a suction hole and a discharge hole are formed;
a suction reed configured to open and close the suction hole; and
a suction muffler, which is positioned below the cylinder and in which a silencing space is formed, the suction muffler including a communication pipe connected to the suction hole,

the communication pipe extends upward from the suction muffler toward the one end portion of the cylinder, and an upper end of the communication pipe is provided with a communication pipe outlet, which is in communication with the suction hole,
the communication pipe outlet includes a communication opening, whose upper shape is a curved protruding shape and whose lower shape is a rectangular shape,
an opening of the suction hole at the cylinder side has a non-recessed closed-curve shape, and an opening of the suction hole at the communication pipe side has a shape corresponding to that of the communication opening of the communication pipe outlet, such that an upper shape of the opening of the suction hole at the communication pipe side is a curved protruding shape, and a lower shape of the opening of the suction hole at the communication pipe side is a rectangular shape,
a lower peripheral surface of the suction hole adjacent to the opening of the suction hole at the communication pipe side includes a curved portion and/or a sloped portion, and an upper peripheral surface of the suction hole adjacent to the opening of the suction hole at the communication pipe side is straight with no steps,
an upper peripheral surface of the communication opening and the upper peripheral surface of the suction hole form one surface, such that there is substantially no step between these upper peripheral surfaces, and
the valve plate and the communication pipe are connected in a state where the upper peripheral surface of the communication opening of the communication pipe outlet corresponds to the upper peripheral surface of the suction hole.

2. The hermetic compressor according to claim 1 , wherein
the curved portion of the lower peripheral surface of the suction hole is curved from the opening of the suction hole at the communication pipe side toward the opening of the suction hole at the cylinder side, and/or the sloped portion of the lower peripheral surface of the suction hole is sloped from the opening of the suction hole at the communication pipe side toward the opening of the suction hole at the cylinder side.

3. The hermetic compressor according to claim 1 , wherein
the suction hole is formed such that its cross-sectional area gradually decreases from the opening of the suction hole at the communication pipe side toward the opening of the suction hole at the cylinder side.

4. The hermetic compressor according to claim 1 , wherein
the opening of the suction hole at the cylinder side has a round shape or an elliptical shape, and
an upper portion of the communication opening of the communication pipe outlet has a half-round shape or a semi-elliptical shape.

5. A refrigeration apparatus comprising a refrigeration cycle including the hermetic compressor according to claim 1 .

6. The hermetic compressor according to claim 1 , wherein
the cross-sectional area of the opening of the suction hole at the communication pipe side is 150 to 250% of the cross-sectional area of the opening at the cylinder side.

Assignees

• Panasonic Ip Man Co Ltd
• Panasonic Appliances Refrigeration Devices Singapore

Inventors

• Yamaoka Masakazu

Classifications

• F04B39/023

  Hermetic compressors · CPC title

• F04B39/0055

  with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes · CPC title

• F04B39/1066 Primary

  Valve plates · CPC title

• F04B39/10 Primary

  Adaptations or arrangements of distribution members · CPC title

• F04B39/0061

  using muffler volumes · CPC title