JP4552910B2 - Compressor - Google Patents

Description

  The present invention relates to a compressor used in, for example, an air conditioner or a refrigerator.

Conventionally, a compressor includes a sealed container, a compression element disposed in the sealed container, and a motor disposed in the sealed container and driving the compression element via a shaft. A discharge pipe for discharging the refrigerant compressed by the compression element and an electric terminal electrically connected to the motor are attached to the top of the closed container (Japanese Patent Laid-Open No. 10-159777). Publication: see Patent Document 1).
JP-A-10-159777

  However, in the conventional compressor, the top of the sealed container is formed in a convex curved surface so that it can withstand high pressure. Therefore, when the discharge pipe is joined to the sealed container with a brazing material, There was a risk that the brazing material would leak out from around the discharge pipe.

  For this reason, the discharge pipe could not be brazed to the closed container reliably, resulting in poor hermetic retention and poor welding. Further, when the electrical terminal is attached to the sealed container after the discharge pipe is brazed to the sealed container, the brazing material adheres to a portion other than the periphery of the discharge pipe in the sealed container, and the sealed container It was difficult to attach the electric terminal to the above.

  Accordingly, an object of the present invention is to provide a compressor that prevents leakage of the brazing material from around the discharge pipe when the discharge pipe is brazed to the sealed container.

In order to solve the above problems, the compressor of the present invention is:
An airtight container, a compression element disposed in the airtight container, and a motor disposed in the airtight container and driving the compression element via a shaft,
The closed container is formed with a curved surface portion provided with a through hole,
In this through hole, a pipe through which the refrigerant is communicated through the inside and outside of the sealed container is passed,
The curved surface portion is provided with a brazing material reservoir for storing a brazing material for joining the pipe to the sealed container around the through hole,
The sealed container has a container body and a lid body that closes the opening of the container body,
The curved surface portion is formed on the lid body, and the brazing material reservoir portion is provided on the curved surface portion,
The brazing material reservoir is formed by a burring process in which a part of the curved surface portion of the sealed container protrudes inward, and a part of the curved surface portion forms a curved surface continuous with the other portion of the curved surface portion. ,
In the sealed container, an electrical terminal is attached in the vicinity of the brazing material reservoir,
At least a part of the electrical terminal is present at a position lower than the uppermost end of the brazing material reservoir.

  Here, the pipe is, for example, a discharge pipe that discharges the refrigerant compressed by the compression element.

  According to the compressor of the present invention, since the brazing material reservoir portion is provided around the through hole in the curved surface portion of the sealed container, the pipe is joined to the sealed container by the brazing material. When doing so, the brazing material can be stored in the brazing material reservoir.

Therefore, if brazing is performed in the direction in which the brazing material accumulates, the brazing material does not leak out from around the piping even if the brazing conditions become unstable, and the piping can be securely brazed to the sealed container. To prevent poor airtightness and poor welding. In addition, after brazing the pipe to the sealed container, the electrical container, a guard member for protecting the terminal, a stud bolt, a compressor protection device, and a compressor are suspended from the sealed container. When the other member (such as a metal fitting) is attached, the brazing material is not attached to a portion other than the brazing material reservoir in the sealed container, so that the other member can be easily attached to the sealed container.
In addition, since the lid body is provided with the brazing material reservoir portion (such as an electrical terminal, a guard member for protecting the terminal, a stud bolt, a compressor protection device, a metal fitting for hanging the compressor, etc. It is suitable for the lid body having a high possibility that the other member is attached, and the other member can be easily attached to the lid body.
Further, since the brazing material reservoir is formed by a burring process in which a part of the curved surface portion of the sealed container is protruded inward, a continuous curved surface can be formed in the sealed container, and the sealed container is sealed. The strength of the container can be secured. Further, when the curvature of a part of the curved portion of the sealed container is made larger than the curvature of the other portion of the curved portion of the sealed container, the strength of the portion having a large curvature of the sealed container is increased. The contact area between the pipe and a part of the curved portion of the sealed container can be increased, and the pressure resistance around the pipe can be secured.
Further, an electrical terminal is attached to the sealed container in the vicinity of the brazing material reservoir, and at least a part of the electrical terminal is present at a position lower than the uppermost end of the brazing material reservoir, The brazing material does not leak out below the brazing material reservoir, and the brazing material does not adhere to the periphery of the mounting hole of the electric terminal, so that the electric terminal can be easily attached to the sealed container.

  Moreover, in the compressor of one Embodiment, the said curved surface part is formed in the end surface of the axial direction of the said airtight container, and the said through-hole exists in the center of the said end surface of the said airtight container.

  According to the compressor of this embodiment, the curved surface portion is formed on the axial end surface of the sealed container, and the through hole is in the center of the end surface of the sealed container. It can arrange | position in the center of the said end surface of an airtight container, and the freedom degree of the mounting direction of a compressor and the design of the said piping increases.

  Moreover, in the compressor of one Embodiment, the refrigerant | coolant in the said airtight container is a carbon dioxide.

  According to the compressor of this embodiment, since the refrigerant in the sealed container is carbon dioxide, a high-pressure refrigerant is used, but the sealed container is provided with the curved surface portion, and the sealed container The pressure strength of the container can be secured.

  According to the compressor of the present invention, since the brazing material reservoir is provided around the through hole in the curved surface portion of the sealed container, when brazing the pipe to the sealed container The leakage of the brazing material from around the pipe is prevented.

  Hereinafter, the present invention will be described in detail with reference to the illustrated embodiments.

(First embodiment)
FIG. 1 is a longitudinal sectional view showing a first embodiment of a compressor according to the present invention. The compressor includes an airtight container 1, a compression element 2 disposed in the airtight container 1, and a motor 3 disposed in the airtight container 1 and driving the compression element 2 via a shaft 12. I have.

  This compressor is a so-called vertical high-pressure dome type rotary compressor, in which the compression element 2 is placed down and the motor 3 is placed up in the sealed container 1. The rotor 6 of the motor 3 drives the compression element 2 via the shaft 12.

  The compression element 2 sucks refrigerant gas from the accumulator 10 through the suction pipe 11. The refrigerant gas is obtained by controlling a condenser, an expansion mechanism, and an evaporator (not shown) that constitute an air conditioner as an example of a refrigeration system together with the compressor. This refrigerant is, for example, carbon dioxide, R410A, or R22.

  The compressor discharges the compressed high-temperature and high-pressure refrigerant gas from the compression element 2 to fill the inside of the hermetic container 1, and passes the gap between the stator 5 and the rotor 6 of the motor 3 through the motor. 3 is cooled, and then discharged from the discharge pipe 13 provided on the upper side of the motor 3 to the outside.

  An oil reservoir 9 in which lubricating oil is stored is formed in the lower portion of the high-pressure region in the closed container 1. This lubricating oil moves from the oil reservoir portion 9 through an oil passage (not shown) provided in the shaft 12 to a sliding portion such as the bearing of the compression element 2 or the motor 3. Lubricate the sliding part. This lubricating oil is, for example, a polyalkylene glycol oil (such as polyethylene glycol or polypropylene glycol), an ether oil, an ester oil, or a mineral oil. The oil passage is, for example, a spiral groove provided on the outer peripheral surface of the shaft 12 or a hole provided in the shaft 12.

  The motor 3 includes the rotor 6 and the stator 5 disposed on the radially outer side of the rotor 6 via an air gap.

  The rotor 6 includes a rotor core 610 and a plurality of magnets embedded in the rotor core 610. The rotor core 610 has a cylindrical shape and is made of, for example, laminated electromagnetic steel plates. The shaft 12 is attached to the central hole of the rotor core 610. The magnet is a flat permanent magnet. The plurality of magnets are arranged at equally spaced center angles in the circumferential direction of the rotor core 610.

  The stator 5 includes a stator core 510 and a coil 520 wound around the stator core 510. The stator core 510 is composed of a plurality of laminated steel plates, and is fitted into the sealed container 1 by press fitting or shrink fitting. The rotor 6 is rotated together with the shaft 12 by an electromagnetic force generated in the stator 5 by passing a current through the coil 520.

  The compression element 2 includes a cylinder 21 that is attached to the inner surface of the sealed container 1, and an upper end plate member 50 and a lower end plate member 60 that are attached to upper and lower open ends of the cylinder 21. Prepare. A cylinder chamber 22 is formed by the cylinder 21, the upper end plate member 50, and the lower end plate member 60.

  The upper end plate member 50 includes a disk-shaped main body 51 and a boss 52 provided upward in the center of the main body 51. The main body 51 and the boss 52 are inserted through the shaft 12.

  The main body 51 is provided with a discharge port 51 a communicating with the cylinder chamber 22. A discharge valve 31 is attached to the main body 51 so as to be located on the opposite side of the main body 51 from the cylinder 21. The discharge valve 31 is, for example, a reed valve, and opens and closes the discharge port 51a.

  A cup-type muffler cover 40 is attached to the main body 51 so as to cover the discharge valve 31 on the side opposite to the cylinder 21. The muffler cover 40 is fixed to the main body 51 by a fixing member 35 (such as a bolt). The muffler cover 40 is inserted through the boss portion 52.

  A muffler chamber 42 is formed by the muffler cover 40 and the upper end plate member 50. The muffler chamber 42 and the cylinder chamber 22 communicate with each other via the discharge port 51a.

  The muffler cover 40 has a hole 43. The hole 43 communicates the muffler chamber 42 with the outside of the muffler cover 40.

  The lower end plate member 60 includes a disk-shaped main body portion 61 and a boss portion 62 provided downward in the center of the main body portion 61. The main body 61 and the boss 62 are inserted through the shaft 12.

  In short, one end of the shaft 12 is supported by the upper end plate member 50 and the lower end plate member 60. That is, the shaft 12 is cantilevered. One end portion (support end side) of the shaft 12 enters the cylinder chamber 22.

  An eccentric pin 26 is provided on the support end side of the shaft 12 so as to be positioned in the cylinder chamber 22 on the compression element 2 side. The eccentric pin 26 is fitted to the roller 27. The roller 27 is disposed so as to be able to revolve in the cylinder chamber 22, and performs a compression action by the revolving motion of the roller 27.

  Next, the compression action of the cylinder chamber 22 will be described.

  As shown in FIG. 2, the cylinder chamber 22 is partitioned by a blade 28 provided integrally with the roller 27. That is, the chamber on the right side of the blade 28 has the suction pipe 11 opened on the inner surface of the cylinder chamber 22 to form a suction chamber (low pressure chamber) 22a. On the other hand, in the chamber on the left side of the blade 28, the discharge port 51a (shown in FIG. 1) opens on the inner surface of the cylinder chamber 22 to form a discharge chamber (high pressure chamber) 22b.

  Semi-cylindrical bushes 25, 25 are in close contact with both surfaces of the blade 28 for sealing. The blade 28 and the bushes 25, 25 are lubricated with the lubricating oil.

  Then, the eccentric pin 26 rotates eccentrically with the shaft 12, and the roller 27 fitted to the eccentric pin 26 contacts the outer peripheral surface of the roller 27 with the inner peripheral surface of the cylinder chamber 22, Revolve.

  As the roller 27 revolves in the cylinder chamber 22, the blade 28 advances and retreats with both side surfaces of the blade 28 being held by the bushes 25, 25. Then, a low-pressure refrigerant gas is sucked into the suction chamber 22a from the suction pipe 11, compressed in the discharge chamber 22b to a high pressure, and then a high-pressure refrigerant gas is supplied from the discharge port 51a (shown in FIG. 1). Discharge.

  Thereafter, as shown in FIG. 1, the refrigerant gas discharged from the discharge port 51 a is discharged to the outside of the muffler cover 40 through the muffler chamber 52.

  As shown in FIGS. 1 and 3, the sealed container 1 is made by processing a steel plate, and includes a container body 100 and a lid body 110 that closes an opening of the container body 100. The lid body 110 is formed with a curved surface portion 120 provided with a through hole 121. The discharge pipe 13 is passed through the through hole 121.

  The curved surface portion 120 is provided with a brazing material reservoir portion 122 that stores a brazing material 130 for joining the discharge pipe 13 to the sealed container 1 around the through hole 121. The brazing material 130 is, for example, silver brazing. The brazing material reservoir 122 is formed by a burring process in which a part of the curved surface portion 120 of the closed container 1 protrudes inward. The curvature of a part of the curved surface portion 120 of the sealed container 1 is larger than the curvature of the other portion of the curved surface portion 120 of the sealed container 1. Further, a part of the curved surface portion 120 is located in a portion having a large curvature in the curved surface portion 120, and the brazing material reservoir portion 122 can be formed while ensuring the strength of the sealed container 1. it can. In other words, the brazing material reservoir portion 122 is provided in a portion of the curved surface portion 120 having a large curvature by burring. The discharge pipe 13 is made of copper, and the thickness of the discharge pipe 13 is thinner than the thickness of a part of the curved surface part 120 and the other part of the curved surface part 120.

  The curved surface portion 120 is formed on the end surface of the sealed container 1 in the direction of the axis 1a. The through hole 121 is in the center of the end surface of the sealed container 1. That is, the curved surface portion 120 is formed at the top of the lid body 110 and is formed as a convex curved surface. The through hole 121 is in a position overlapping the shaft 1 a of the sealed container 1 in the lid body 110.

  The curved surface portion 120 is formed in an elliptical curved surface, and a part of the curved surface portion 120 is inclined so as not to face the discharge pipe 13 (the shaft 1a) side without being orthogonal to the shaft 1a of the sealed container 1. Part. An electric terminal 140 that is electrically connected to the motor 3 and a cover 141 that serves as protection of the electric terminal 140, attachment of a compressor protection device, and suspension of the compressor are attached to the plane portion. ing. The flat portion is provided with a minimum area to which the electric terminal 140 and the cover 141 can be attached in order to ensure the pressure resistance of the sealed container 1.

  The lid main body 120 is provided with the electrical terminal 140 in the vicinity of the brazing material reservoir 122, and at least a part of the electrical terminal 140 is at a position lower than the uppermost end of the brazing material reservoir 122. Exists.

  That is, the mounting hole 123 is provided in the flat surface portion of the curved surface portion 120, and at least a part of the mounting hole 123 is subjected to burring with the shaft 1a of the sealed container 1 arranged in the vertical direction. It exists at a position lower than the base of the burring portion that forms the material pool portion 122. The electrical terminal 140 is welded to the mounting hole 123, and the cover 141 is welded around the mounting hole 123.

  According to the compressor having the above-described configuration, since the brazing material reservoir 122 is provided around the through-hole 121 in the curved surface portion 120 of the sealed container 1, the discharge pipe 13 is connected to the sealed container. When the brazing material 130 is joined to the brazing material 130, the brazing material 130 can be stored in the brazing material reservoir 122.

  Therefore, even if the brazing condition becomes unstable, the brazing material 130 does not leak from the periphery of the discharge pipe 13, and the discharge pipe 13 can be reliably brazed to the closed container 1, so that the closed container 1. Prevents poor airtightness and poor welding. Further, when other members such as the electrical terminals 140 are attached to the sealed container 1 after the discharge pipe 13 is brazed to the sealed container 1, portions other than the brazing material reservoir portion 122 in the sealed container 1. Since the brazing material 130 is not attached to the airtight container 1, it is easy to attach the other member to the sealed container 1.

  Since the brazing material reservoir 122 is provided on the lid body 110 (such as the electric terminal 140, the cover 141, the stud bolt, the compressor protection device, the metal fitting for hanging the compressor, etc. ) It is suitable for the lid body 110 that is likely to be attached with other members, and the other members can be easily attached to the lid body 110.

  Moreover, since the brazing material reservoir 122 is formed by burring processing in which a part of the curved surface portion 120 of the sealed container 1 protrudes inward, it is possible to form a curved surface continuous with the sealed container 1. The strength of the sealed container 1 can be ensured.

  Moreover, since the curvature of a part of the curved surface portion 120 of the sealed container 1 is larger than the curvature of the other portion of the curved surface portion 120 of the sealed container 1, the strength of the portion having a large curvature of the sealed container 1 is In addition, the contact area between the discharge pipe 13 and a part of the curved surface portion 120 of the sealed container 1 can be increased, and the pressure strength around the discharge pipe 13 can be secured.

  In addition, the curved surface portion 120 is formed on the end surface of the sealed container 1 in the axis 1a direction, and the through-hole 121 is in the center of the end surface of the sealed container 1, so the discharge pipe 13 is It can arrange | position in the center of the said end surface of the container 1, and the freedom degree of the design of the mounting direction of the compressor and the said discharge pipe 13 increases.

  Further, since the burring is formed at the center of the closed container 1 toward the inside of the closed container 1, the curved shape of the burring is recessed in the same shape on the entire circumference, so that a curved surface having a large curvature is obtained without concentration of stress. The pressure resistance strength of the sealed container 1 can be increased.

  Further, since the burring is formed not toward the outside of the sealed container 1 but toward the inside, the cover 141 can be installed at a position close to the discharge pipe 13 without interfering with the lid body 110. it can.

  In addition, the electrical terminal 140 is attached to the sealed container 1 in the vicinity of the brazing material reservoir portion 122, and at least a part of the electrical terminal 140 is lower than the uppermost end of the brazing material reservoir portion 122. However, the brazing material 130 does not leak out below the brazing material reservoir portion 122 and the brazing material 130 does not adhere to the periphery of the mounting hole 123. It becomes easy to attach to the airtight container 1.

  Further, when carbon dioxide is used as the refrigerant in the sealed container 1, a high-pressure refrigerant is used. However, the curved container 120 is provided in the sealed container 1, and the pressure resistance strength of the sealed container 1 is increased. It can be secured.

(The first reference example)
FIG. 4 shows a first reference example of the compressor of the present invention. The difference from the first embodiment will be described. In the first reference example , the brazing material reservoir 222 is formed by machining.

  More specifically, the brazing material reservoir 222 is formed on the curved surface portion 120 of the lid body 110 by chamfering or leveling the through hole 121 using a drill, an end mill, or the like.

  Accordingly, since the brazing material reservoir 222 is formed by machining, the size of the brazing material reservoir 222 can be changed as necessary. Further, as in the first embodiment, the brazing material reservoir 222 may be provided in a portion of the curved surface portion 120 having a large curvature, and the brazing material 1 is secured while maintaining the strength of the sealed container 1. The material reservoir 222 can be formed.

(Second reference example)
FIG. 5 shows a second reference example of the compressor of the present invention. The difference from the first embodiment will be described. In the second reference example , the brazing material reservoir 322 is formed by a mold.

  More specifically, the brazing material reservoir 322 is formed around the through-hole 121 on the curved surface portion 120 of the lid body 110 by pressing, or the curved surface portion 120 of the lid body 110 is punched. The brazing material reservoir 322 is formed together with the through hole 121.

  Therefore, since the brazing material reservoir 322 is formed by a mold, the brazing material reservoir 322 can be easily formed. In addition, the thickness of the portion where the brazing material reservoir 322 is formed can be formed to the same thickness as the thickness of the closed container 1, and the pressure strength can be prevented from lowering. Similarly to the first embodiment, the brazing material reservoir portion 322 may be provided in a portion having a large curvature in the curved surface portion 120, and the brazing material 1 is secured while maintaining the strength of the sealed container 1. The material reservoir 322 can be formed.

( Third reference example)
FIG. 6 shows a third reference example of the compressor of the present invention. The difference from the first embodiment will be described. In the third reference example, the brazing material reservoir portion 422 is formed by burring processing in which a part of the curved surface portion 120 of the sealed container 1 protrudes outward. ing.

  More specifically, burring is performed on the curved surface portion 120 of the lid main body 110 around the through hole 121, and the tip of the burring portion subjected to the burring process forms the brazing material reservoir portion 422. In other words, the tip of the burring portion is inclined with respect to the discharge pipe 13 (that is, the axis 1a of the sealed container 1) so as to face the discharge pipe 13 (that is, the axis 1a of the closed container 1). The brazing material reservoir 422 having a depth may be formed by machining the tip of the burring portion.

  Therefore, since the brazing material reservoir 422 is formed by burring processing in which a part of the curved surface portion 120 of the sealed container 1 protrudes outward, it is possible to form a continuous curved surface on the sealed container 1. The strength of the sealed container 1 can be ensured. In addition, the relationship of the magnitude | size of the one part curvature of the said curved surface part 120 of the said airtight container 1 and the curvature of the other part of the said curved surface part 120 of the said airtight container 1 is the same as that of the said 1st Embodiment. .

  In addition, this invention is not limited to the above-mentioned embodiment. For example, as piping that is brazed to the sealed container 1 by the brazing material reservoirs 122, 222, 322, and 422, in addition to the discharge pipe 13, the inside and outside of the sealed container 1 are communicated with each other to supply refrigerant. Any piping can be used. For example, a suction pipe that sucks refrigerant into the sealed container 1 may be used.

  Further, the brazing material reservoir portions 122, 222, 322, 422 may be provided in a portion having a small curvature in the curved surface portion 120. In addition to copper, the discharge pipe 13 may be made of iron or other metal. The thickness of the discharge pipe 13 may be a part of the curved surface portion 120 (brazing material reservoir portion) or the curved surface portion 120. It may be thicker than the thickness of the part.

  In addition to the convex curved surface of the lid main body 110, the curved surface portion 120 provided with the brazing material reservoir portions 122, 222, 322, and 422 may be, for example, a cylindrical surface of the container main body 100.

  Further, the electrical terminal 140 is attached to a position away from the brazing material reservoirs 122, 222, 322, 422 or higher than the uppermost end of the brazing material reservoirs 122, 222, 322, 422. Also good.

  The compression element 2 may be a rotary type in which the roller and the blade are separate bodies. As the compression element 2, a scroll type or a reciprocating type may be used in addition to the rotary type.

  Further, the compression element 2 may be a two-cylinder type having two cylinder chambers. Further, the compression element 2 may be disposed above and the motor 3 may be disposed below. The compressor may be a so-called low-pressure dome type compressor in which the closed container is filled with a refrigerant before being compressed by the compression element.

It is a longitudinal section showing a 1st embodiment of a compressor of the present invention. It is a top view of a compression element. It is a top view of a compressor. It is a partial sectional view showing the 1st reference example of the compressor of the present invention. It is a partial cross section figure showing the 2nd reference example of the compressor of the present invention. It is a partial sectional view showing the 3rd reference example of the compressor of the present invention.

DESCRIPTION OF SYMBOLS 1 Airtight container 1a Shaft 2 Compression element 3 Motor 5 Stator 6 Rotor 12 Shaft 13 Discharge pipe (pipe)
DESCRIPTION OF SYMBOLS 100 Container main body 110 Lid main body 120 Curved surface part 121 Through-hole 122,222,322,422 Brazing material reservoir part 123 Mounting hole 130 Brazing material 140 Electrical terminal 141 Cover

Claims (3)

An airtight container (1), a compression element (2) disposed in the airtight container (1), and the compression element (2) disposed in the airtight container (1) through the shaft (12). And a motor (3) for driving
The closed container (1) is formed with a curved surface portion (120) provided with a through hole (121),
The through hole (121) is connected with a pipe (13) through which the refrigerant is communicated between the inside and the outside of the sealed container (1).
The curved surface portion (120) has a brazing material reservoir portion (122, 222,) in which a brazing material (130) for joining the pipe (13) to the sealed container (1) is collected around the through hole (121). 322, 422) are provided,
The closed container (1) includes a container body (100) and a lid body (110) that closes an opening of the container body (100).
The curved surface (120) is formed on the lid body (110), and the brazing material reservoir (122, 222, 322, 422) is provided on the curved surface (120).
The brazing material reservoir (122) is formed by a burring process in which a part of the curved surface part (120) of the sealed container (1) protrudes inward, and a part of the curved surface part (120) Forming a curved surface continuous with the other portion of the curved surface portion (120);
An electrical terminal (140) is attached to the closed container (1) in the vicinity of the brazing material reservoir (122, 222, 322, 422),
At least a part of the electric terminal (140) is present at a position lower than the uppermost end of the brazing material reservoir (122, 222, 322, 422). The compressor according to claim 1,
The curved surface portion (120) is formed on the end surface of the sealed container (1) in the axial (1a) direction,
The compressor characterized in that the through hole (121) is in the center of the end face of the sealed container (1). The compressor according to claim 1,
The compressor characterized in that the refrigerant in the sealed container (1) is carbon dioxide.

Images