JP2018009543A - Compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compressor which inhibits multiple pipelines provided at an upper part of a closed vessel from vibrating in a manner such that the pipelines move close to or away from each other.SOLUTION: A scroll compressor 10 includes: a casing 20; a suction pipeline 31; an injection pipeline 32; and a connection member 39. A compression mechanism 40 is housed in the casing 20. The suction pipeline 31 and the injection pipeline 32 are provided penetrating through an upper part of the casing 20. The connection member 39 connects the suction pipeline 31 with the injection pipeline 32 to integrate these pipelines.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a compressor.

  There is known a compressor in which a suction pipe and a liquid injection pipe are provided in an upper portion of a hermetic container (see Patent Document 1 (Japanese Patent Laid-Open No. 2015-086704)).

  In this type of compressor, when the suction pipe and the liquid injection pipe vibrate so as to repeatedly approach and separate from each other due to a lack of rigidity in the upper part of the sealed container between the suction pipe and the liquid injection pipe There is. The above-mentioned problem occurs not only when the pipe provided at the upper part of the sealed container is a suction pipe and a liquid injection pipe, but also, for example, when the pipe is provided at the upper part of the sealed container. It occurs not only in the case of books but also in the case of three or more. That is, it occurs when a plurality of pipes are provided in the upper part of the sealed container regardless of the type of pipe.

  The subject of this invention is providing the compressor which suppresses the vibration which repeats the approach and separation | separation mutually by the some piping provided in the upper part of the airtight container.

  The compressor concerning the 1st viewpoint of the present invention is provided with a casing, a plurality of piping, and a connection member. A compression mechanism is accommodated in the casing. The plurality of pipes are provided through the upper part of the casing. The connecting member connects and integrates a plurality of pipes.

  In the compressor which concerns on the 1st viewpoint of this invention, since several piping is connected and integrated by the connection member, the rigidity of the part between several piping among the upper parts of a casing can be supplemented. As a result, it is possible to suppress vibrations that repeatedly approach and separate from each other due to a plurality of pipes.

  In the compressor according to the second aspect of the present invention, the connecting member is welded to a plurality of pipes.

  In the compressor which concerns on the 2nd viewpoint of this invention, since a connection member is welded to several piping, rigidity can be improved more.

  In the compressor according to the third aspect of the present invention, the connecting member is detachably attached to the plurality of pipes.

  In the compressor which concerns on the 3rd viewpoint of this invention, since a connection member is detachably attached to several piping, rigidity can be improved with a simple structure.

  In the compressor concerning the 4th viewpoint of the present invention, each of a plurality of piping has the 1st rigid part and the 2nd rigid part whose rigidity is higher than the 1st rigid part. The connecting member connects the second rigid portions of the plurality of pipes.

  In the compressor which concerns on the 4th viewpoint of this invention, since a connection member connects the 2nd rigid part of several piping, rigidity can be improved more.

  In the compressor according to the fifth aspect of the present invention, each of the plurality of pipes has a pipe seat. The connecting member connects the pipe seats of the plurality of pipes.

  In the compressor which concerns on the 5th viewpoint of this invention, a connection member connects the piping seats of several piping, ie, connects the root part exposed from the casing among several piping. Therefore, the rigidity can be further increased compared to the case where the tip portions are connected.

  In the compressor according to the present invention, it is possible to suppress vibrations that repeatedly approach and separate from each other due to a plurality of pipes.

It is a longitudinal section of an example of a scroll compressor concerning this embodiment. FIG. 2 is a partially enlarged view of a longitudinal sectional view of the scroll compressor of FIG. 1. It is a partial enlarged view of the longitudinal cross-sectional view of the other example of a scroll compressor. It is a partial enlarged view of the longitudinal cross-sectional view of the other example of a scroll compressor. It is a partial enlarged view of the longitudinal cross-sectional view of the other example of a scroll compressor.

  Embodiments of the present invention are shown below. The following embodiments are merely specific examples and do not limit the invention according to the claims.

<First Embodiment>
FIG. 1 is a longitudinal sectional view of a scroll compressor 10 as an example of a compressor. FIG. 2 is a partially enlarged view of a longitudinal sectional view of the scroll compressor 10 of FIG. The scroll compressor 10 is used in a refrigeration apparatus such as an air conditioner. The scroll compressor 10 compresses the refrigerant gas circulating in the refrigerant circuit of the refrigeration apparatus.

(1) Configuration of Scroll Compressor The scroll compressor 10 compresses refrigerant using two scroll members having spiral wraps that mesh with each other. The scroll compressor 10 mainly includes a casing 20, a compression mechanism 40, a housing 47, an electric motor 50, a lower bearing portion 70, a crankshaft 60, a suction pipe 31, a discharge pipe 26, and an injection pipe 32. Prepare.

(1-1) Casing The casing 20 is formed of a rigid member that is unlikely to be deformed or damaged when the pressure or temperature changes inside and outside the casing 20.

  The casing 20 includes a cylindrical body casing portion 21, a bowl-shaped upper wall section 22, and a bowl-shaped bottom wall section 23. The upper wall portion 22 is welded in an airtight manner to the upper end portion of the body casing portion 21. The bottom wall portion 23 is welded to the lower end portion of the trunk portion casing portion 21 in an airtight manner.

  The casing 20 is installed so that the cylindrical axial direction of the body casing portion 21 is along the vertical direction.

  Two seating surfaces are formed on the upper surface of the upper wall portion 22. The two seating surfaces are located away from each other. One seating surface is a seating surface for the suction piping 31, and the other seating surface is a seating surface for the injection piping 32. An opening for attaching the suction pipe 31 is formed in the seating surface for the suction pipe 31. An opening for attaching the injection pipe 32 is formed in the seating surface for the injection pipe 32.

  The casing 20 accommodates a compression mechanism 40, a housing 47, an electric motor 50, a lower bearing portion 70, a crankshaft 60, and the like.

  An oil reservoir space in which lubricating oil is stored is formed at the bottom of the casing 20. Lubricating oil is used to keep the lubricity of sliding parts such as the compression mechanism 40 during the operation of the scroll compressor 10.

(1-2) Compression Mechanism The compression mechanism 40 sucks and compresses the low-temperature and low-pressure refrigerant gas and discharges the compressed refrigerant that is the high-temperature and high-pressure refrigerant gas. The compression mechanism 40 is mainly composed of a fixed scroll 41 and a movable scroll 44. The fixed scroll 41 is fixed to the casing 20. The movable scroll 44 revolves with respect to the fixed scroll 41.

  The fixed scroll 41 includes a first end plate 41a and a spiral first wrap 41b formed upright on the first end plate 41a. A discharge hole 41f is formed in the center of the first end plate 41a. On the upper surface of the first end plate 41a, a recess 41e communicating with the discharge hole 41f is formed. The recess 41e is a space that is recessed in the upper surface of the first end plate 41a. A lid 33 is fixed to the upper surface of the fixed scroll 41 so as to close the recess 41e. The fixed scroll 41 and the lid 33 are tightly sealed through a gasket. A muffler space Sm is formed by covering the lid 33 with the recess 41e. The gas refrigerant compressed in the compression chamber Sc, which will be described later, is discharged from the discharge hole 41f to the muffler space Sm, then passes through the refrigerant passage formed in the fixed scroll 41 and the housing 47, and flows into the high-pressure space Sh.

  A suction hole 41c is formed in the first end plate 41a. The suction pipe 31 and the compression chamber Sc communicate with each other through the suction hole 41c. A check valve 82 is provided in the suction hole 41c. The check valve 82 prevents the refrigerant in the compression chamber Sc from flowing back to the suction pipe 31 when the scroll compressor 10 is stopped.

  The first end plate 41a is formed with an injection hole 41d. The injection pipe 32 and the compression chamber Sc in the middle of compression communicate with each other via an injection hole 41d.

  The movable scroll 44 includes a second end plate 44 a, a spiral second wrap 44 b formed upright on the second end plate 44 a, and a boss portion 46. The boss portion 46 protrudes from the lower surface of the second end plate 44a. The boss portion 46 is formed in a cylindrical shape. An eccentric portion 61 of the crankshaft 60 is inserted into the boss portion 46. The boss part 46 and the eccentric part 61 are connected.

  The movable scroll 44 is supported by the housing 47 through an Oldham coupling. When the crankshaft 60 rotates, the Oldham coupling causes the movable scroll 44 to revolve without rotating with respect to the fixed scroll 41, and the refrigerant in the compression chamber Sc is compressed.

  The fixed scroll 41 and the movable scroll 44 form a compression chamber Sc when the first wrap 41b and the second wrap 44b are engaged with each other. The compression chamber Sc is a space surrounded by the first end plate 41a, the first wrap 41b, the second end plate 44a, and the second wrap 44b. The volume of the compression chamber Sc gradually decreases due to the revolving motion of the movable scroll 44. During the revolution of the movable scroll 44, the lower surfaces of the first end plate 41a and the first wrap 41b of the fixed scroll 41 slide with the upper surfaces of the second end plate 44a and the second wrap 44b of the movable scroll 44.

(1-3) Housing The housing 47 is press-fitted into the body casing portion 21 of the casing 20. An outer edge 43 of the fixed scroll 41 is fixed to the upper portion of the housing 47.

  A recess 47 a is formed at the center upper portion of the housing 47. A boss 46 of the movable scroll 44 is accommodated inside the recess 47a.

  An upper bearing portion 47b having a smaller diameter than the concave portion 47a is formed in the lower portion of the concave portion 47a. The main shaft 62 of the crankshaft 60 is inserted so as to penetrate the upper bearing portion 47b. The upper bearing portion 47b rotatably supports the main shaft 62.

(1-4) Electric Motor The electric motor 50 drives the compression mechanism 40. The electric motor 50 includes a substantially annular stator 51 and a rotor 52. The stator 51 is fixed to the inner wall surface of the body casing portion 21 of the casing 20. The rotor 52 is rotatably accommodated with a slight gap (air gap passage) inside the stator 51.

  The rotor 52 is connected to the movable scroll 44 via the crankshaft 60. As the rotor 52 rotates, the movable scroll 44 revolves with respect to the fixed scroll 41.

(1-5) Lower Bearing Part The lower bearing part 70 rotatably supports the main shaft 62 of the crankshaft 60. The lower bearing portion 70 is disposed below the electric motor 50. The lower bearing portion 70 is fixed to the trunk casing portion 21.

(1-6) Crankshaft The crankshaft 60 transmits the driving force of the electric motor 50 to the movable scroll 44. The crankshaft 60 is disposed so as to extend in the vertical direction along the axis of the trunk casing portion 21 of the casing 20. The crankshaft 60 connects the rotor 52 and the movable scroll 44.

  The crankshaft 60 has a main shaft 62 whose center axis coincides with the axis of the body casing portion 21, and an eccentric portion 61 that is eccentric with respect to the axis of the body casing portion 21. The eccentric portion 61 is disposed at the upper end of the main shaft 62 and is connected to the boss portion 46 of the movable scroll 44. The main shaft 62 is rotatably supported by the upper bearing portion 47 b and the lower bearing portion 70 of the housing 47. The main shaft 62 is connected to the rotor 52 of the electric motor 50 between the upper bearing portion 47 b and the lower bearing portion 70.

(1-7) Suction Pipe The suction pipe 31 supplies low-pressure gas refrigerant to the compression chamber Sc of the compression mechanism 40. The suction pipe 31 is disposed on a seating surface for the suction pipe 31 formed on the upper wall portion 22. A part of the suction pipe 31 passes through an opening formed in a seating surface for the suction pipe 31. The suction pipe 31 has a first rigid portion and a second rigid portion that is higher in rigidity than the first rigid portion. The suction pipe 31 includes a suction seat 31a, a suction connection pipe 31b, a suction communication pipe 31c, and a suction pipe 31d.

  The suction seat 31a as the second rigid portion is a substantially cylindrical joint having both ends opened as a whole. The suction seat 31 a extends upward from the upper surface of the upper wall portion 22 along the axial direction of the crankshaft 60. A step portion 31e is formed on the inner wall surface of the suction seat 31a. An iron-based material can be used as the material for the suction seat 31a.

  The suction connection pipe 31b as the first rigid portion is a cylindrical pipe. The suction connection pipe 31b is inserted into the hollow portion of the suction seat 31a. The lower end of the suction connection pipe 31b is in contact with the step portion 31e of the suction seat 31a. The suction connection pipe 31b is fixed by a step part 31e. A copper-based material can be used as the material of the suction connection pipe 31b.

  The suction communication pipe 31c as the second rigid portion is a cylindrical pipe. The suction communication pipe 31c is inserted into the hollow portion of the suction connection pipe 31b. As the material of the suction communication pipe 31c, an iron-based material plated with a copper-based material can be used. The suction communication pipe 31c is fixed to the suction connection pipe 31b. An example of the fixing method is brazing.

  The suction pipe 31d as the first rigid portion is inserted into the hollow portion of the suction communication pipe 31c. A copper-based material can be used as the material of the suction pipe 31d. The suction pipe 31d is fixed to the suction communication pipe 31c. An example of the fixing method is brazing.

(1-8) Discharge Piping The discharge piping 26 is a tube for discharging the compressed refrigerant from the high-pressure space Sh to the outside of the casing 20. The discharge pipe 26 is fitted into the body casing portion 21 of the casing 20 in an airtight manner.

(1-9) Injection Pipe The injection pipe 32 is a pipe for introducing the gas refrigerant or liquid refrigerant flowing through the refrigerant circuit into the compression chamber Sc of the compression mechanism 40. The injection pipe 32 is disposed on a seating surface for the injection pipe 32 formed on the upper wall portion 22. A part of the injection pipe 32 passes through an opening formed in a seating surface for the injection pipe. The injection pipe 32 has a first rigid portion and a second rigid portion that is higher in rigidity than the first rigid portion. The injection pipe 32 includes an injection seat 32a, an injection connection pipe 32b, and an injection pipe 32c.

  The injection seat 32a as the second rigid portion is a cylindrical joint having both ends opened. The injection seat 32 a extends upward from the upper surface of the upper wall portion 22 along the axial direction of the crankshaft 60. An iron-based material can be used as the material of the injection seat 32a.

  The injection connection pipe 32b as the first rigid portion is a cylindrical pipe. The injection connecting pipe 32b is inserted and fixed in the hollow portion of the injection seat 32a. A copper-based material can be used as the material of the injection connection pipe 32b.

  The injection pipe 32c as the first rigid portion is inserted into the hollow portion of the injection connection pipe 32b. A copper-based material can be used as the material of the injection tube 32c. The injection pipe 32c is fixed to the injection connection pipe 32b. An example of the fixing method is brazing.

(1-10) Connecting member The connecting member 39 connects the suction pipe 31 and the injection pipe 32. In the present embodiment, the connecting member 39 connects the suction seat 31a and the injection seat 32a. That is, the connecting member 39 connects the second rigid portions of the suction pipe 31 and the injection pipe 32. The connecting member 39 integrates the suction pipe 31 and the injection pipe 32. In the present embodiment, the connecting member 39 is welded to the suction pipe 31 and the injection pipe 32. That is, the connecting member 39, the suction pipe 31, and the injection pipe 32 are separate members. In the present embodiment, the connecting member 39 is made of an iron-based material.

(2) Operation of Scroll Compressor First, the rotor 52 rotates when the electric motor 50 is driven. As a result, the crankshaft 60 fixed to the rotor 52 rotates. The rotational movement of the crankshaft 60 is transmitted to the movable scroll 44 via the upper bearing portion 47b. The axis of the upper end portion of the crankshaft 60 is eccentric with respect to the axis of the rotational movement of the crankshaft 60, and the movable scroll 44 is prevented from rotating by the Oldham joint. Therefore, the movable scroll 44 revolves with respect to the fixed scroll 41 without rotating.

  The low-temperature and low-pressure refrigerant before compression is sucked from the suction pipe 31 into the compression chamber Sc of the compression mechanism 40. By the revolving motion of the movable scroll 44, the compression chamber Sc moves from the outer peripheral portion of the fixed scroll 41 toward the center portion while gradually decreasing the volume thereof. As a result, the refrigerant in the compression chamber Sc is compressed into a compressed refrigerant. The compressed refrigerant is discharged from the discharge hole 41f to the muffler space Sm, and then passes through the refrigerant passage and is supplied to the high-pressure space Sh. Then, it flows into the discharge pipe 26 from the high-pressure space Sh and is discharged to the outside of the scroll compressor 10.

(3) Features of the scroll compressor In the scroll compressor 10 of the present embodiment, the suction pipe 31 and the injection pipe 32 are connected and integrated by a connecting member 39. Accordingly, the rigidity of the portion of the upper wall portion 22 between the suction pipe 31 and the injection pipe 32 can be supplemented. As a result, it is possible to suppress vibrations caused by the suction pipe 31 and the injection pipe 32 that repeatedly approach and separate from each other.

  In the scroll compressor 10 of the present embodiment, the connecting member 39 is welded to the suction pipe 31 and the injection pipe 32. Therefore, for example, the rigidity can be further increased as compared with the case where the connecting member 39 is detachably connected.

  In the scroll compressor 10 of the present embodiment, the connecting member 39 connects the second rigid portions of the suction pipe 31 and the injection pipe 32 to each other. Therefore, compared with the case where the 1st rigid parts are connected, rigidity can be improved more.

  In the scroll compressor 10 of the present embodiment, the connecting member 39 connects the suction seat 31a and the injection seat 32a. That is, the root portions exposed from the casing 20 of the suction seat 31a and the injection seat 32a are connected. Therefore, the rigidity can be further increased compared to the case where the tip portions are connected.

<Modification>
A modification applicable to the embodiment of the present invention will be described.

(1) Modification A
In the above description, the connecting member 39 is disposed outside the casing 20, but may be disposed inside the casing 20.

  FIG. 3 is a partially enlarged view of a longitudinal sectional view of another example of the scroll compressor 10. In FIG. 3, the same reference numerals as those used in the scroll compressor 10 shown in FIG. 2 are used as necessary for the components common to the scroll compressor 10 shown in FIG.

  In the scroll compressor 10 of FIG. 3, the suction seat 31 a passes through the upper wall portion 22. That is, the lower end of the suction seat 31 a is located in the casing 20. Similarly, the injection seat 32 a passes through the upper wall portion 22. That is, the lower end of the injection seat 32 a is located in the casing 20. In the scroll compressor 10 of FIG. 3, the connecting member 39 connects the suction seat 31 a and the injection seat 32 a in the casing 20. Also in this case, since the rigidity of the portion between the suction pipe 31 and the injection pipe 32 in the upper wall portion 22 can be supplemented, vibrations that repeatedly approach and separate from each other by the suction pipe 31 and the injection pipe 32 are suppressed. be able to.

(2) Modification B
In the above description, the connecting member 39, the suction seat 31a, and the injection seat 32a are separate members, but the connecting member 39, the suction seat 31a, and the injection seat 32a may be integrally formed. That is, the suction seat 31a and the injection seat 32a may be integrally formed.

(3) Modification C
In the above description, the connecting member 39 connects the suction seat 31a and the injection seat 32a, but other portions may be connected. In the above description, the connection method between the connection member 39 and the suction pipe 31 and the injection pipe 32 is welding, but other connection methods may be used. Brazing may be used as a connection method. The connecting member 39 may be detachably attached to the suction pipe 31 and the injection pipe 32.

  FIG. 4 is a partially enlarged view of a vertical sectional view of another example of the scroll compressor 10. In FIG. 4, the same reference numerals as those used in the scroll compressor 10 shown in FIG. 2 are used as necessary for the components common to the scroll compressor 10 shown in FIG.

  In the scroll compressor 10 of FIG. 4, the connecting member 39 connects the suction pipe 31d and the injection pipe 32c. That is, the connecting member 39 connects the first rigid portions of the suction pipe 31 and the injection pipe 32. Here, the connecting member 39 is detachably attached to the suction pipe 31d and the injection pipe 32c. Accordingly, the rigidity can be increased with a simple configuration without taking time and effort to attach the connecting member 39.

(4) Modification D
In the above description, the connecting member 39 is made of an iron-based material. However, the connecting member 39 may be made of another material as long as the above-described vibration can be suppressed. For example, if the connection member 39 is configured to be detachably attached to the suction pipe 31 and the injection pipe 32, the connection member 39 may be made of a resin material.

(5) Modification E
In the above description, the connecting member 39 connects the suction pipe 31 and the injection pipe 32, but the types of pipes to be connected are not limited to these. For example, if the suction pipe 31 and the discharge pipe 26 are arranged on the upper wall portion 22, the connecting member 39 may connect the suction pipe 31 and the discharge pipe 26. Moreover, although the connection member 39 connected two piping, the number of piping used as connection object is not restricted to this. For example, if the three pipes of the suction pipe 31, the discharge pipe 26, and the injection pipe 32 are arranged on the upper wall portion 22, the connecting member 39 is the suction pipe 31, the discharge pipe 26, and the injection pipe 32. May be connected. In addition, the connecting member 39 may not connect the three pipes together, but may connect two of the three pipes individually. For example, the suction pipe 31 and the discharge pipe 26 may be connected, and the suction pipe 31 and the injection pipe 32 may be connected. At this time, the discharge pipe 26 and the injection pipe 32 may not be connected. As described above, the connecting member 39 may connect a plurality of pipes arranged on the upper wall portion 22 regardless of the type of pipe.

(6) Modification F
In the above description, the connecting member 39 connects the suction pipe 31 and the injection pipe 32, but the members to be connected are not limited to these. The connecting member 39 may be connected to another member.

  FIG. 5 is a partially enlarged view of a longitudinal sectional view of another example of the scroll compressor 10. In FIG. 5, the same reference numerals as those used in the scroll compressor 10 shown in FIG. 2 are used as necessary for the constituent elements common to the scroll compressor 10 shown in FIG.

  In the scroll compressor 10 in FIG. 5, the lower end of the suction seat 31 a and the lower end of the injection seat 32 a are located in the casing 20, as in the scroll compressor 10 in FIG. 3. In the scroll compressor 10 of FIG. 5, the connecting member 39 connects the suction seat 31 a and the injection seat 32 a in the casing 20, and connects the grip portion 30 formed on the upper wall portion 22. In other words, the connecting member 39 may perform the function of the grip portion 30 in addition to the function of connecting the suction pipe 31 and the injection pipe 32.

(7) Modification G
In the above description, each of the suction pipe 31 and the injection pipe 32 has the first rigid part and the second rigid part, but may further have a third rigid part that is lower in rigidity than the first rigid part. . In this case, the connecting member 39 may connect the third rigid portions of the suction pipe 31 and the injection pipe 32. At this time, the connecting member 39 may be detachably attached to the suction pipe 31d and the injection pipe 32c.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiments. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Scroll compressor 20 Casing 31 Suction piping 31a Suction seat 32 Injection piping 32a Injection seat 39 Connecting member 40 Compression mechanism

Japanese Patent Laid-Open No. 2015-086704

Claims (5)

A casing (20) containing a compression mechanism (40);
A plurality of pipes (31, 32) provided through the upper part of the casing;
A connecting member (39) for connecting and integrating the plurality of pipes;
A compressor (10) comprising: The connecting member is welded to the plurality of pipes,
The compressor according to claim 1. The connecting member is detachably attached to the plurality of pipes.
The compressor according to claim 1. Each of the plurality of pipes has a first rigid portion and a second rigid portion that is higher in rigidity than the first rigid portion,
The connecting member connects the second rigid portions of the plurality of pipes;
The compressor according to any one of claims 1 to 3. Each of the plurality of pipes has a pipe seat (31a, 32a),
The connecting member connects the pipe seats of the plurality of pipes;
The compressor according to any one of claims 1 to 4.

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