JP2010038087A - Hermetic compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hermetic compressor manufacturable at low cost and having increased productivity. <P>SOLUTION: In this hermetic compressor having an electric element and a compression element in a hermetic container, a discharge pipe for discharging a refrigerant gas from the hermetic container comprises the inner and outer pipes of the upper hermetic container which forms the upper side of the hermetic container. Since the material of the inner pipe is steel and the material of the outer pipe is copper, the hermetic compressor can be manufactured at low cost. Since one opening of the inner pipe is enlarged to make the front end thereof in a retroflexed shape, and connected to the outer pipe, the positioning of the discharge pipe when welding the discharge pipe to the upper hermetic container with a brazing filler can be performed easier than before, thereby the productivity can be increased. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a structure of a hermetic compressor including an electric element and a compression element in a hermetic container, and in particular, a discharge pipe provided for discharging refrigerant gas in the hermetic container to the outside of the hermetic container. It is about.

  As a conventional hermetic compressor, there has been one disclosed in Patent Document 1, for example. As shown in Patent Document 1, an electric element is arranged in the upper part of the sealed container and a compression element is arranged in the lower part. The electric element is connected to a rotating shaft constituting the compression element, and the compression element is driven by driving the electric element. It has a structure that compresses the refrigerant.

  The refrigerant compressed and discharged by the compression element is discharged from a discharge pipe welded and fixed to the upper closed container constituting the upper side of the closed container with a brazing material to a copper pipe connected to the upper end of the discharge pipe.

The discharge pipe is made of the same material and made of one component of copper to facilitate connection by welding with the copper pipe connected to the upper end of the discharge pipe.
JP-A-5-99172

  However, in the conventional hermetic compressor, since the material of the discharge pipe provided on the upper hermetic container constituting the upper side of the hermetic container is a copper material, the price of the hermetic compressor is increased. Since the discharge pipe is a straight pipe, there has been a problem that it is difficult to perform positioning work when the discharge pipe is fixed to the upper airtight container with a brazing material.

  In order to solve the above-described conventional problems, a hermetic compressor according to the present invention is a hermetic compressor including an electric element and a compression element in a hermetic container, in order to discharge refrigerant gas from the hermetic container. The provided discharge pipe is composed of an inner pipe inside and an outer pipe outside the upper sealed container that constitutes the upper side of the sealed container, and the inner pipe is made of steel and the outer pipe is made of copper. One of the opening portions is expanded and the tip portion is warped, and is connected to the outer tube by welding with a brazing material.

  The hermetic compressor of the present invention has the above-described configuration, and the material of the inner pipe constituting the discharge pipe is made of steel, thereby reducing the price of the hermetic compressor and expanding one opening of the inner pipe. By connecting the tip portion to the outer tube with a curved shape, positioning at the time of welding fixation with a brazing material to the upper sealed container of the discharge tube can be performed more easily than before, and productivity can be improved.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
FIG. 1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention, and FIG. 2 is a longitudinal sectional view of a discharge pipe according to Embodiment 1 of the present invention.

As shown in FIGS. 1 and 2, the electric element 2 is arranged in the upper part of the sealed container 1, and the compression element 3 is arranged in the lower part. The electric element 2 is connected to a rotating shaft 4 constituting the compression element 3, The refrigerant is compressed by the compression element 3 by driving the electric element 2.

  The refrigerant compressed and discharged by the compression element 3 is discharged from a discharge pipe 4 provided in the upper closed container 1a constituting the upper side of the closed container 1 to a copper pipe connected to the upper end of the discharge pipe 4. The discharge pipe 4 is composed of an inner pipe 4a inside the upper sealed container 1a and an outer pipe 4b outside, and the inner pipe 4a is made of steel and the outer pipe 4b is made of copper. In addition to expanding the opening of the tube, it has a curved portion 4c having a curved shape at the tip, and is welded and fixed to the upper sealed container 4a with a brazing material 5 while being connected to the outer tube 4b.

  According to such a configuration, the price of the hermetic compressor can be reduced by making the material of the inner pipe 4a constituting the discharge pipe 4 steel, and the warped portion 4c is provided, so that the upper part of the discharge pipe 4 is higher than the conventional one. Positioning at the time of welding fixation with the brazing material 5 to the sealed container 4a can be easily performed, and productivity can be improved.

  The hermetic compressor of the present invention can be applied to any hermetic compressor regardless of the compression mode.

1 is a longitudinal sectional view of a hermetic compressor according to Embodiment 1 of the present invention. The longitudinal cross-sectional view of the discharge piping in Embodiment 1 of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 1a Upper airtight container 2 Electric element 3 Compression element 3a Rotating shaft 4 Discharge pipe 4a Outer pipe 4b Inner pipe 4c Warpage part 5 Raw material

Claims (1)

In a hermetic compressor including an electric element and a compression element in a hermetic container, a discharge pipe provided for discharging refrigerant gas from the hermetic container is connected to an upper hermetic container constituting the upper side of the hermetic container. Consists of an inner inner tube and an outer outer tube, the inner tube is made of steel, the outer tube is made of copper, one opening of the inner tube is expanded, and the tip is bent in a curved shape. A hermetic compressor characterized by being welded and fixed to the upper hermetic container with a brazing material in a connected state.