JP5531891B2 - Accumulator for refrigerant compressor - Google Patents

Description

  The present invention relates to an accumulator for a refrigerant compressor used in a refrigeration cycle such as a refrigeration apparatus or an air conditioner.

  Conventionally, a hermetic container constituted by an upper lid, a lower lid, and a shell, a refrigerant suction pipe that penetrates the center of the upper end portion of the hermetic container, and a lower end portion of the hermetic container that stands up toward the inside of the hermetic container A compressor accumulator having a low-pressure connecting pipe, a partition plate disposed between the refrigerant suction pipe and a plurality of refrigerant flow passages provided in the partition plate, wherein the low-pressure connecting pipe includes: An accumulator for a compressor comprising a large-diameter straight iron pipe standing upright inside a closed container and a small-diameter copper curved pipe connected to the iron straight pipe by outer periphery welding at the bottom of the closed container is disclosed (for example, , See Patent Document 1).

  Further, an accumulator for a compressor is disclosed in which a low-pressure communication pipe extending from the outside of the hermetic container to the upper part of the inside is composed of only a copper pipe (see, for example, Patent Document 2).

JP 2009-197622 A JP 2005-188295 A

  However, according to the conventional technique described in Patent Document 1, a large-diameter iron straight pipe that stands upright inside the sealed container, a small-diameter copper bent pipe that extends outside the sealed container, and a bottom penetration of the sealed container. Since the holes are connected by outer periphery welding, there is a problem that vibration of the compressor body is transmitted from the copper bent pipe to the bottom of the closed container of the accumulator, and vibration noise is generated from the bottom of the closed container. The reason is that the outer periphery welding has high connection strength (rigidity), and the vibration of the compressor body is easily transmitted to the bottom of the sealed container.

  Further, according to the conventional technique described in Patent Document 2, since the low-pressure connecting pipe is composed of only a copper pipe, there is a problem that the amount of copper material used is large and the cost is high.

  The present invention has been made in view of the above, and an object of the present invention is to obtain an accumulator for a refrigerant compressor that has a low vibration noise generated from the bottom of the closed container of the accumulator and is low in cost.

  In order to solve the above-described problems and achieve the object, the present invention provides a sealed container that is disposed in the vicinity of a refrigerant compressor and whose upper part is connected to a low-pressure side pipeline of a refrigeration cycle, and one end of the refrigerant compressor. A copper tube that is inserted into the sealed container through the bottom through-hole of the sealed container and is brazed to the bottom through-hole, and one end of the other end of the copper tube. And an iron pipe having the other end extended to the upper part in the sealed container.

  The accumulator for a refrigerant compressor according to the present invention has an effect that the vibration noise generated from the bottom of the sealed container is low and the cost is low.

FIG. 1 is a longitudinal sectional view showing Embodiment 1 of an accumulator for a refrigerant compressor according to the present invention. FIG. 2 is a noise level comparison diagram of the conventional accumulator described in Patent Document 1 and the accumulator of the first embodiment. FIG. 3 is a longitudinal sectional view showing a second embodiment of an accumulator for a refrigerant compressor according to the present invention.

  Embodiments of an accumulator for a refrigerant compressor according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

  FIG. 1 is a longitudinal sectional view showing a first embodiment of an accumulator for a refrigerant compressor according to the present invention, and FIG. 2 is a comparison of noise levels of the conventional accumulator described in Patent Document 1 and the accumulator of the first embodiment. FIG.

  The refrigerant compressor accumulator 1 according to the first embodiment is disposed in the vicinity of a side of a refrigerant compressor (not shown), and is attached to the casing of the refrigerant compressor by an accumulator holder and an accumulator band.

  As shown in FIG. 1, the accumulator 1 for the refrigerant compressor of Example 1 is a cylinder in which a lower part of a cylindrical upper shell 11 having a top plate and an upper part of a cylindrical lower shell 12 having a bottom plate are joined. The airtight container 10 is provided. In the center of the top plate of the upper shell 11, a system connection pipe 13 connected to the low pressure side pipe of the refrigeration cycle is fitted and fixed.

  The accumulator 1 according to the first embodiment has one end connected to the suction portion of the refrigerant compressor (not shown) and the other end passing through the bottom through-holes 22a and 22b of the lower shell 12 of the sealed container 10 in the sealed container 10. L-shaped first and second copper tubes 141a and 141b inserted up to the end. The first and second copper tubes 141a and 141b are copper brazed to the lower through holes 22a and 22b, respectively. Copper brazing has a lower joint rigidity than welding.

  The accumulator 1 according to the first embodiment has one end fitted and connected to the connecting portions 143a and 143b at the other ends of the first and second copper tubes 141a and 141b, and the other end to the upper part in the sealed container 10. First and second iron pipes 142a and 142b are provided. The first and second iron pipes 142a and 142b are straight pipes.

  The L-shaped first copper pipe 141a and the first iron pipe 142a connected to each other constitute a first low-pressure connecting pipe 14a, and the L-shaped second copper pipe 141b and the second iron pipe 142b. Constitutes the second low-pressure communication pipe 14b. The first and second low-pressure communication pipes 14a and 14b guide the low-pressure refrigerant of the refrigeration cycle to the compression unit of a refrigerant compressor (not shown) via the accumulator 1.

  A partition plate 16 is disposed above the first and second low-pressure communication pipes 14a and 14b in the upper part of the sealed container 10. The partition plate 16 has a plurality of refrigerants at positions not facing the upper inlet so that the refrigerant flowing from the system connection pipe 13 does not directly flow into the upper inlets of the first and second low-pressure communication pipes 14a and 14b. A passage hole is provided. Further, a stay 17 for fixing the first and second low-pressure communication pipes 14a and 14b is disposed in the middle portion in the vertical direction of the sealed container 10.

  As a characteristic configuration of the accumulator 1 according to the first embodiment, the first and second copper tubes 141a and 141b are brazed to the lower through holes 22a and 22b, respectively, and the first and second copper tubes 141a. , 141b and the first and second iron pipes 142a, 142b are connected inside the sealed container 10, so that the vibration sound generated from the bottom of the sealed container 10 is generated as shown in FIG. From the low speed range to the high speed range, it can be made smaller than the conventional accumulator described in the cited document 1. Moreover, the usage-amount of copper material can be decreased and it becomes low-cost compared with the conventional accumulator described in the cited reference 2. FIG.

  FIG. 3 is a longitudinal sectional view showing a second embodiment of an accumulator for a refrigerant compressor according to the present invention. As shown in FIG. 3, the accumulator 2 for the refrigerant compressor of the second embodiment has one end connected to a suction portion of a refrigerant compressor (not shown) and the other end connected to the bottom through-hole 22a of the lower shell 12 of the sealed container 10. L-shaped first and second copper pipes 141a and 141b inserted through 22b to the inside of the sealed container 10 are provided. The first and second copper tubes 141a and 141b are copper brazed to the lower through holes 22a and 22b, respectively.

  Further, the accumulator 2 of the second embodiment has one end fitted and connected to the connecting portions 143a and 143b at the other ends of the first and second copper tubes 141a and 141b, and the other end to the upper part in the sealed container 10. First and second iron pipes 142a and 142b are provided.

  As a characteristic configuration of the accumulator 2 according to the second embodiment, the inner diameters of the first and second copper tubes 141a and 141b are the same as the inner diameters of the first and second iron tubes 142a and 142b. The outer diameters of the copper pipes 141a and 141b are larger than the outer diameters of the first and second iron pipes 142a and 142b.

  The first and second copper pipes 141a and 141b are expanded to the same diameter as the outer diameter of the first and second iron pipes 142a and 142b by cutting the inner walls of the connecting portions 143a and 143b. One ends of the first and second iron pipes 142a and 142b are fitted in the connecting portions 143a and 143b having a diameter, and the first and second copper pipes 141a and 141b and the first and second iron pipes 142a and 142b Is connected. There is also a method in which one end of the first and second iron pipes 142a and 142b is fitted into the pipes by pressing or the like without cutting the inner walls of the connection parts 143a and 143b. In this case, the connection parts 143a and 143b In order to increase the outer diameter and insert the connecting portions 143a and 143b, the diameter of the lower through-holes 22a and 22b of the accumulator 2 must be increased, which is intermediate between the first and second copper tubes 141a and 141b. When brazing a part with copper, gaps increase and workability deteriorates. Since the configuration of the accumulator 2 of the second embodiment other than the above-described portion is the same as that of the accumulator 1 of the first embodiment, the description of the other portions is omitted.

  In the accumulator 2 according to the second embodiment, the inner diameters of the first and second copper tubes 141a and 141b are the same as the inner diameters of the first and second iron tubes 142a and 142b, so that the flow resistance of the refrigerant gas flowing through the tubes is small. The deterioration of the efficiency of the refrigerant compressor to which the accumulator 2 is attached can be prevented.

  As described above, the accumulator of the refrigerant compressor according to the present invention is suitable for a rotary compressor used in a refrigeration cycle such as a refrigeration apparatus or an air conditioner.

1, 2 Refrigerant compressor accumulator 10 Sealed container 11 Upper shell 12 Lower shell 14a First low-pressure connecting pipe 14b Second low-pressure connecting pipe 141a First copper pipe 141b Second copper pipe 142a First iron pipe 142b First 2 iron pipes 143a, 143b connection portion 16 partition plate 17 stay 22a, 22b bottom through hole

Claims (2)

A sealed container that is arranged near the refrigerant compressor and whose upper part is connected to the low-pressure side pipeline of the refrigeration cycle;
One end is connected to the suction portion of the refrigerant compressor, the other end is inserted into the sealed container through the bottom through hole of the sealed container, and a copper tube brazed to the bottom through hole;
An iron pipe having one end connected to the other end of the copper pipe and the other end extended to the upper part in the sealed container;
An accumulator for a refrigerant compressor, comprising:   The accumulator for a refrigerant compressor according to claim 1, wherein the inner diameter of the iron pipe and the inner diameter of the copper pipe are the same.

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