JP2005248754A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor, for preventing leakage of refrigerant in a sealed vessel to the outside, even if axial misalignment of a compression element and the sealed vessel is caused. <P>SOLUTION: A rotary compressor 10 has a rotary compression mechanism 18 and a sealed vessel 12. The rotary compressor 10 further has: a copper pipe 141 whose tip side is inserted in a suction passage 60 and a discharge muffling chamber and base end side is inserted in a refrigerant guide port 94A and a refrigerant discharge port 96A; a cylindrical collar member 142 hit in the inside of the copper pipe 141 to close a clearance between the copper pipe 141, a suction passage 60 and the discharge muffling chamber 62; a cylindrical collar member 142 hit in the inside of the copper pipe 141 to close a clearance between the copper pipe 141, the refrigerant guide port 94A and a refrigerant discharge port 96A; and refrigerant guide part 94 and a refrigerant discharge part 94 attached to the the refrigerant guide port 94A and the refrigerant discharge port 96A and connected to base end side of the copper pipe 141. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a compressor that includes, for example, a compression element and a sealed container that houses the compression element, and compresses and discharges the introduced refrigerant by driving the compression element.

  2. Description of the Related Art Conventionally, hot water supply devices and in-vehicle air conditioners have a refrigerant circuit composed of a heat exchanger and a compressor. The compressor includes, for example, an electric element, a compression element connected to the electric element, and an iron hermetic container that accommodates the electric element and the compression element, and the electric element drives the compression element. By doing so, the introduced refrigerant is compressed and discharged.

  The above compressor is made of, for example, a material mainly composed of aluminum having a low specific gravity for weight reduction. Further, a pipe for introducing the refrigerant and a pipe for discharging the already compressed refrigerant are connected to the sealed container of the compressor (see, for example, Patent Document 1). Specifically, the compression element is provided with an introduction pipe for introducing a refrigerant and a discharge pipe for discharging the refrigerant. On the other hand, a suction joint mounting hole is formed in the sealed container, and the suction joint is inserted into the suction joint mounting hole and connected to the introduction pipe and the discharge pipe of the compression element. And piping is being fixed to the outer side of this suction joint by brazing.

Therefore, in the compressor manufacturing process described above, a suction joint mounting hole is formed in the sealed container in advance, and the compression element is stored in the sealed container so that the introduction pipe and the discharge pipe face the suction joint mounting hole. There is a need.
JP 2000-105007 A

  However, in reality, there is a relative displacement between the introduction pipe and the discharge pipe due to assembly tolerances of the compression element, and it is difficult to store the compression element in the sealed container with high accuracy. Axis misalignment was likely to occur between the pipe or discharge pipe and the suction joint mounting hole of the sealed container. Therefore, a gap is generated between the piping and the suction joint mounting hole of the sealed container, and the refrigerant inside the sealed container may leak to the outside through this gap.

  The objective of this invention is providing the compressor which can prevent that the refrigerant | coolant inside a sealed container leaks outside, even if axial displacement arises in a compression element and a sealed container.

  The compressor according to the first aspect of the present invention is a compressor that includes a compression element and a sealed container that houses the compression element, and compresses and discharges the introduced refrigerant by driving the compression element. A refrigerant passage through which a refrigerant passes is formed in the compression element, a pipe connection hole is formed in the sealed container, a pipe having a distal end inserted into the refrigerant passage and a proximal end inserted into the pipe connection hole A cylindrical first collar that is driven into the pipe to close the gap between the pipe and the refrigerant passage, and is driven into the pipe to close the gap between the pipe and the pipe connection hole. A cylindrical second collar, and an external pipe connected to the base end side of the pipe by being attached to the pipe connection hole.

  Here, examples of the pipe include an annealed copper pipe and an aluminum pipe, but the pipe is not limited to this as long as it is formed of a plastically deformable material. Moreover, the external piping which comprises a refrigerant cycle is connected to an external piping part.

  According to the invention of claim 1, by inserting a pipe into the refrigerant passage of the compression element, and in this state, driving the first collar into the pipe, the outer diameter of the pipe on the refrigerant passage side is expanded, The gap between the refrigerant passage of the compression element and the pipe is closed. Next, by driving the second collar into the pipe, the portion near the pipe connection hole of the pipe is expanded to close the gap between the pipe connection hole and the pipe of the sealed container. By using an annealed copper pipe as the pipe, the pipe can be expanded without affecting the compression element.

  Therefore, even if an axial deviation occurs between the refrigerant passage of the compression element and the pipe connection hole of the sealed container, the shape of the pipe is forcibly changed by driving the first collar and the second collar into the pipe. Can be adapted to the connection hole.

  As a result, since the gap between the refrigerant passage of the compression element and the pipe is closed, it is possible to prevent the refrigerant inside the refrigerant passage from leaking into the sealed container and the refrigerant inside the sealed container from leaking into the refrigerant path. In addition, since the gap between the pipe connection hole and the pipe of the sealed container is closed, the refrigerant inside the external piping part is prevented from leaking into the sealed container, and the refrigerant inside the sealed container is prevented from leaking inside the external pipe part. it can.

  The compressor according to a second aspect of the invention is characterized in that the space between the pipe connection hole and the external pipe portion is sealed.

  According to the invention of claim 2, since the space between the pipe connection hole and the external pipe part is sealed, the refrigerant inside the sealed container can be prevented from leaking to the outside of the sealed container.

  The compressor of the invention of claim 3 is characterized in that a portion of the sealed container to which the external piping portion is attached is formed to be thick.

  According to invention of Claim 3, since the part to which an external piping part is attached among the airtight containers was formed in thickness, an external piping part can be easily bolted to an airtight container using the thickness of an airtight container.

  The compressor of the invention of claim 4 is characterized in that a protrusion is formed on the inner wall surface of the pipe connection hole of the sealed container over the entire circumference.

  According to the invention of claim 4, since the protrusion is formed on the inner wall surface of the pipe connection hole of the sealed container over the entire circumference, when the outer diameter of the pipe is expanded with the second collar, the outer wall surface of the pipe is attached to the protrusion. By abutting, the gap between the pipe connection hole and the pipe can be easily closed.

  The compressor of the invention of claim 5 is characterized in that a rubber O-ring projects from the inner wall surface of the pipe connection hole of the hermetic container.

  According to the invention of claim 5, since the rubber O-ring protrudes from the inner wall surface of the pipe connection hole of the hermetic container, when the second collar expands the outer diameter of the pipe, By contacting the wall surface, the gap between the pipe connection hole and the pipe can be easily closed.

  According to the compressor of the present invention, the following effects can be obtained. Even if an axial deviation occurs between the refrigerant passage of the compression element and the pipe connection hole of the sealed container, the shape of the pipe is forcibly changed by driving the first collar and the second collar into the pipe. Can be adapted to. As a result, since the gap between the refrigerant passage of the compression element and the pipe is closed, it is possible to prevent the refrigerant inside the refrigerant passage from leaking into the sealed container and the refrigerant inside the sealed container from leaking into the refrigerant path. In addition, since the gap between the pipe connection hole and the pipe of the sealed container is closed, the refrigerant inside the external piping part is prevented from leaking into the sealed container, and the refrigerant inside the sealed container is prevented from leaking inside the external pipe part. It is possible to secure the stability and reliability of the cooling capacity.

  Hereinafter, each embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a rotary compressor 10 as an internal intermediate pressure type multi-stage (two-stage) compression compressor provided with a first rotary compression element 32 and a second rotary compression element 34 according to the present embodiment.

The rotary compressor 10 is an internal intermediate pressure multistage compression rotary compressor that is mounted in an engine room of a vehicle such as an electric vehicle (HEV or PEV) and uses carbon dioxide (CO ₂ ) as a refrigerant. The rotary compressor 10 includes a cylindrical sealed container 12, an electric element 14 housed above the inner space of the sealed container 12, and a lower housed space of the sealed container 12 and connected to the electric element 14. And a rotary compression mechanism 18 as a compressed element.

  The electric element 14 includes a stator 22 that is annularly formed along the inner peripheral surface of the upper space of the hermetic container 12, and a rotor that is rotatably provided inside the stator 22 via a slight gap (air gap). 24.

  The stator 22 has a laminated body 26 in which donut-shaped electromagnetic steel plates are laminated, and a stator coil 28 wound around the teeth of the laminated body 26 by a direct winding (concentrated winding) method. The rotor 24 includes a rotating shaft 16 as a driving shaft passing through the rotation center, a laminated body 30 in which electromagnetic steel plates are laminated similarly to the stator 22, and a permanent magnet MG disposed in the laminated body 30. Have.

  On the other hand, the rotary compression mechanism 18 is provided above the second rotary compression element 34 and the first rotary compression element 32 (first stage) and the second rotary compression element 34 (second stage) driven by the electric element 14. The upper support member 54 and the upper cover 66 that are disposed, the intermediate partition plate 36 that is disposed between the first rotary compression element 32 and the second rotary compression element 34, and the lower side of the first rotary compression element 32 are disposed. A lower support member 56 that also serves as a bearing for the rotary shaft 16 and a lower cover 68 are provided. Here, the excluded volume of the second rotary compression element 34 is smaller than the excluded volume of the first rotary compression element 32.

  As shown in FIG. 2, the second rotary compression element 34 includes an upper cylinder 38, an upper eccentric portion 42 that is disposed in the upper cylinder 38 and fixed to the rotary shaft 16, and is fitted to the upper eccentric portion 42. A combined upper roller 46 and an upper vane 50 that contacts the upper roller 46 and divides the inside of the upper cylinder 38 into a low pressure side and a high pressure side are provided.

  The upper cylinder 38 is formed with a suction port 161 that connects a low pressure side and a refrigerant introduction path 92 described later, and a discharge port 39 that connects a high pressure side and a discharge silencer chamber 62 described later of the upper support member 54. Yes. The upper cylinder 38 is formed with a communication hole 134 connected to a later-described through hole 131 of the intermediate partition plate 36 at the suction port 161, and oil is supplied through the communication hole 134.

  According to the second rotary compression element 34, first, the refrigerant gas is sucked into the low pressure side through the suction port 161. Then, when the upper eccentric portion 42 and the upper roller 46 are eccentrically rotated, the space where the refrigerant gas in the upper cylinder 38 is sucked is reduced. As a result, the refrigerant gas is compressed to a high pressure and is discharged through the discharge port 39 from the high pressure side.

  Returning to FIG. 1, a discharge silencing chamber 62 is provided which is formed to be recessed upward and connected to the discharge port 39 (see FIG. 2) of the upper cylinder 38. The upper support member 54 is provided with a discharge valve that opens and closes the discharge port 39.

  A bearing 54A is erected at the center of the upper support member 54, and a cylindrical bush 122 is mounted on the inner surface of the bearing 54A. The bush 122 is made of a material having good sliding properties.

  The upper cover 66 closes the discharge silencing chamber 62 of the upper support member 54. Thereby, the discharge silencing chamber 62 and the electric element 14 side in the sealed container 12 are partitioned. The upper cover 66 includes a partition portion 66A that partitions the sealed container 12, and a contact portion 66B that is provided on the outer periphery of the partition portion 66A and contacts the inner wall surface of the sealed container 12.

  The bearing 54A of the upper support member 54 passes through the partition portion 66A of the upper cover 66. The contact portion 66B is fixed to the sealed container 12 by welding and is in contact with the lower end surface of the stator 22 of the electric element 14.

  An O-ring 126 is provided between the inner peripheral surface of the upper cover 66 and the outer surface of the bearing 54A. The O-ring 126 can prevent gas leakage from the discharge silencer chamber 62 and can increase the volume of the discharge silencer chamber 62.

  The first rotary compression element 32 has the same configuration as the second rotary compression element 34, and is fixed to the rotary shaft 16 with a phase difference of 180 degrees with respect to the upper eccentric portion 42 in the lower cylinder 40 and the lower cylinder 40. A lower eccentric portion 44, a lower roller 48 fitted to the lower eccentric portion 44, a lower vane (not shown) that abuts against the lower roller 48 and divides the inside of the lower cylinder 40 into a low pressure side and a high pressure side, It has.

  The lower cylinder 40 is connected to a suction port (not shown) that connects a low-pressure side and a suction passage 60 (described later) of the lower support member 56 and a discharge (not shown) that connects a high-pressure side and a discharge silencer chamber 64 (described later) of the lower support member 56. And ports are formed.

  According to the first rotary compression element 32, first, the refrigerant gas is sucked into the low pressure side through the suction port. The space where the refrigerant gas in the lower cylinder 40 is sucked is reduced by the eccentric rotation of the lower eccentric portion 44 and the lower roller 48. As a result, the refrigerant gas is compressed to a high pressure and is discharged from the high pressure side through the discharge port.

  The lower support member 56 includes a suction passage 60 connected to the suction port of the lower cylinder 40, and a discharge silencer chamber 64 that is formed to be recessed downward and connected to the discharge port of the lower cylinder 40. . The lower support member 56 is provided with a discharge valve for opening and closing the discharge port.

  A bearing 56A is formed through the center of the lower support member 56, and a cylindrical bush 123 is mounted on the inner surface of the bearing 56A. The bush 123 is formed of a material having good slidability like the bush 122. As a result, the rotary shaft 16 is held by the bearings 54 </ b> A of the upper support member 54 and the bearings 56 </ b> A of the lower support member 56 via the bushes 122 and 123.

  The lower cover 68 closes the discharge silencing chamber 64 of the lower support member 56. The lower cover 68 is formed of a donut-shaped circular steel plate and is fixed to the lower support member 56. Further, the inner peripheral edge of the lower cover 68 protrudes inward from the inner surface of the bearing 56 </ b> A of the lower support member 56, whereby the lower end surface of the bush 123 is held by the lower cover 68.

  The intermediate partition plate 36 has a substantially donut shape, and the inner peripheral surface thereof communicates with the outer peripheral surfaces of the upper and lower eccentric portions 42 and 44. In the intermediate partition plate 36, a through hole 131 extending from the inner peripheral surface toward the outer peripheral surface, and a communication hole 133 communicating the middle of the through hole 131 with the upper end surface are formed. A sealing material 132 is press-fitted on the outer peripheral surface side of the through hole 131. The communication hole 133 is connected to the communication hole 134 of the upper cylinder 38.

  Further, the lower support member 56, the upper and lower cylinders 38 and 40, the upper support member 54, the upper cover 66, and the intermediate partition plate 36 include a discharge silencer chamber 64 of the lower support member 56 and an upper side of the upper cover 66 in the sealed container 12. A communication passage that communicates with the space is formed so as to penetrate therethrough. An intermediate discharge pipe (not shown) is erected at the upper end of the communication path, and this intermediate discharge pipe extends toward a gap between adjacent stator coils 28 wound around the stator 22 of the electric element 14. Yes. Thereby, the refrigerant gas having a relatively low temperature can be actively supplied to the electric element 14, and the temperature rise of the electric element 14 can be suppressed.

  Further, the upper support member 54 and the upper cover 66 are provided with a refrigerant introduction path 92 that communicates the suction port 161 of the upper cylinder 38 with the electric element 14 side in the sealed container 12.

  The upper and lower cylinders 38 and 40, the intermediate partition plate 36, the upper and lower part supporting members 54 and 56, and the upper and lower part covers 66 and 68 are fastened from above and below by four main bolts 128 and main bolts 129, respectively. That is, the main bolt 128 is inserted from the upper cover 66 side, and the tip thereof is screwed into the lower support member 56. The main bolt 129 is inserted from the lower cover 68 side, and the tip thereof is screwed into the upper support member 54.

  An oil hole 80 extending along the axial direction and oil supply holes 82 and 84 extending from the middle of the oil hole 80 and extending in the direction intersecting the axial direction are formed in the rotary shaft 16. The oil supply holes 82 and 84 extend to the outer peripheral surfaces of the upper and lower eccentric portions 42 and 44 of the rotary compression elements 32 and 34.

  An oil pump 99 is provided at the lower end of the rotating shaft 16. The bottom of the sealed container 12 is an oil reservoir, and the oil pump 99 draws oil from the oil reservoir. The pumped oil rises through the oil hole 80, passes through the oil supply holes 82 and 84, and is supplied to the sliding portions of the upper and lower eccentric parts 42 and 44, the first rotary compression element 32, and the second rotary compression element 34. The This prevents wear and seals of the upper and lower eccentric parts 42, 44, the first rotary compression element 32, and the second rotary compression element 34.

  Specifically, as will be described later, the inside of the sealed container 12 is at an intermediate pressure and is lower than that in the upper cylinder 38. However, the oil is pumped up from the oil reservoir at the inner bottom of the sealed container 12 and rises through the oil hole 80, and the oil supply holes 82, 84, the through hole 131 of the intermediate partition plate 36, the communication hole 133, and the communication of the upper cylinder 38. The gas is supplied to the suction port 161 of the upper cylinder 38 through the hole 134.

As the refrigerant, carbon dioxide (CO ₂ ), which is a natural refrigerant that is friendly to the global environment, is used in consideration of flammability and toxicity. As the oil (lubricating oil), existing oils such as mineral oil (mineral oil), alkylbenzene oil, ether oil, ester oil, or PAG (polyalkylene glycol) are used.

  The hermetic container 12 is made of a material mainly composed of aluminum, and has a substantially cylindrical container body 12A in which an opening 12C is formed on the upper end surface and the lower end surface is closed, and the opening 12C of the container body 12A is closed. And an end cap 12B as a substantially disk-shaped lid member. The electric element 14 and the rotary compression mechanism 18 are accommodated in the container body 12A.

  The upper side (opening 12C side) of the outer peripheral surface of the container main body 12A is formed to be slightly thick, and the tip of the outer peripheral surface of the container main body 12A (the edge of the opening 12C) is formed to be thin. . Further, four thick pillar portions 12F extending downward from the center are formed on the outer peripheral surface of the container body 12A. Each column part 12F is mutually orthogonal, and the refrigerant | coolant introduction part 94 and the refrigerant | coolant discharge part 96 which are mentioned later are connected to these column parts 12F.

  The central portion of the end cap 12B is thick, and a circular mounting hole 12D is formed in the central portion. A disk-shaped terminal 20 that closes the mounting hole 12D is bolted to the end cap 12B. An electrical terminal 139 (wiring is omitted) for supplying power to the electric element 14 is fixed to the terminal 20 through. Further, an attachment portion 20B extending inside the edge of the opening 12C of the container body 12A is formed at the edge of the end cap 12B. A substantially C-shaped backing member 70 is fitted inside the mounting portion 20B.

  As shown in FIG. 3, a refrigerant introduction hole 94 </ b> A and a refrigerant discharge hole 96 </ b> A as pipe connection holes are formed on the outer surface of the container body 12 </ b> A of the sealed container 12. A refrigerant introduction part 94 as an external pipe part is attached to the refrigerant introduction hole 94A, and a refrigerant discharge part 96 as an external pipe part is attached to the refrigerant discharge hole 96A. The refrigerant introduction part 94 and the refrigerant discharge part 96 are connected to a refrigerant pipe constituting a refrigerant cycle (not shown).

  The refrigerant introduction portion 94 and the refrigerant discharge portion 96 include a cylindrical sleeve 151 and a flange 152 formed at the tip of the sleeve 151. Each flange 152 is fixed to the outer surface of the container main body 12 </ b> A with a bolt 153. An O-ring 155 is provided between the flange 152 and the outer wall surface of the container body 12A so as to surround the refrigerant introduction hole 94A and the refrigerant discharge hole 96A. Thereby, the space between the coolant introduction hole 94A and the coolant introduction portion 94 and the space between the coolant discharge hole 96A and the coolant discharge portion 96 are sealed.

  Further, the suction passage 60 as the refrigerant passage of the lower support member 56 is disposed to face the refrigerant introduction hole 94A, and the discharge silencer chamber 62 as the refrigerant passage of the upper support member 54 faces the refrigerant discharge hole 96A. Has been placed. Each of the suction passage 60 and the discharge silencer chamber 62 is fitted with a copper pipe 141 as a pipe, and the base end side of the copper pipe 141 reaches the refrigerant introduction hole 94A and the refrigerant discharge hole 96A, and introduces the refrigerant. The portion 94 and the sleeve 151 of the refrigerant discharge portion 96 are connected. A rubber O-ring 154 protrudes from the inner wall surfaces of the refrigerant introduction hole 94A and the refrigerant discharge hole 96A of the container body 12A.

  A cylindrical collar member 142 as a first collar is driven into the distal end side of each copper tube 141. A cylindrical collar member 143 as a second collar is driven into the proximal end side of each copper tube 141.

  The refrigerant introduction part 94 and the refrigerant discharge part 96 are connected to the suction passage 60 and the discharge silencer chamber 62 in the following procedure.

  (ST1) The copper tubes 141 reaching the refrigerant introduction hole 94A and the refrigerant discharge hole 96A of the container body 12A are inserted into the suction passage 60 of the lower support member 56 and the discharge silencer chamber 62 of the upper support member 54, respectively.

  (ST2) The outer diameter of the copper tube 141 is expanded by driving the collar member 142 into the tip side inside each copper tube 141, the gap between the suction passage 60 of the lower support member 56 and the copper tube 141, and the upper support The gap between the discharge silencing chamber 62 of the member 54 and the copper tube 141 is closed.

  (ST3) The collar member 143 is driven into the inside of the base end side of each copper pipe 141, thereby expanding the outer diameter of the copper pipe 141, the gap between the refrigerant introduction hole 94A and the copper pipe 141, and the refrigerant discharge hole 96A. The gap with the copper tube 141 is closed.

  (ST4) The refrigerant introduction part 94 is attached to the refrigerant introduction hole 94A, and the refrigerant discharge part 96 is attached to the refrigerant discharge hole 96A. Thereby, the refrigerant introduction part 94 and the refrigerant discharge part 96 are connected to the base end side of each copper pipe 141.

  Next, the operation of the rotary compressor 10 will be described. First, when the stator coil 28 of the electric element 14 is energized via the terminal 20 and a wiring (not shown), the electric element 14 is activated and the rotor 24 rotates. As a result, the upper and lower rollers 46 and 48 of the rotary compression elements 32 and 34 eccentrically rotate in the upper and lower cylinders 38 and 40 via the rotary shaft 16 and the upper and lower eccentric parts 42 and 44.

  Then, the low-pressure (first-stage suction pressure LP: 4 MPaG) refrigerant gas in the refrigerant introduction section 94 is drawn into the rotary compressor 10. Specifically, the refrigerant gas is sucked into the low pressure side of the first rotary compression element 32 via the suction passage 60 of the lower support member 56 and the suction port of the lower cylinder 40 of the first rotary compression element 32. The sucked low-pressure refrigerant gas is compressed by the operation of the lower roller 48 and the lower vane of the first rotary compression element 32 to become a refrigerant gas having an intermediate pressure (first-stage discharge pressure MP1: 8 MPaG). This intermediate-pressure refrigerant gas passes through the discharge port of the lower cylinder 40, the discharge silencer chamber 64 of the lower support member 56, the communication path, and the intermediate discharge pipe from the high-pressure chamber side of the first rotary compression element 32, and the sealed container 12. It is discharged inside.

  The intermediate pressure refrigerant gas in the hermetic container 12 passes through the refrigerant introduction path 92, the suction passage of the upper support member 54, and the suction port 161 of the upper cylinder 38 of the second rotary compression element 34. (Second stage suction pressure MP2: 8 MPaG). The sucked intermediate-pressure refrigerant gas is further compressed by the operation of the upper roller 46 and the upper vane 50 of the second rotary compression element 34 to become a high-temperature and high-pressure (second-stage discharge pressure HP: 12 MPaG) refrigerant gas. . This high-pressure refrigerant gas is discharged from the high-pressure chamber side of the second rotary compression element 34 to the refrigerant discharge portion 96 via the discharge port 39 of the upper cylinder 38 and the discharge silencer chamber 62 of the upper support member 54.

  Therefore, according to this embodiment, there are the following effects. The copper pipe 141 is inserted into the suction passage 60 and the discharge silencing chamber 62 of the rotary compression mechanism 18, and the collar member 142 is driven into each copper pipe 141 in this state, whereby the suction passage 60 and the discharge of the copper pipe 141 are discharged. The outer diameter of the portion on the side of the muffler chamber 62 is expanded, and the suction passage 60 and the gap between the discharge muffler chamber 62 and the copper pipe 141 are closed. Next, by driving the collar member 143 into the copper pipe 141, the portions near the refrigerant introduction hole 94A and the refrigerant discharge hole 96A of the copper pipe 141 are expanded, and the refrigerant introduction hole 94A, the refrigerant discharge hole 96A and the copper pipe 141 are expanded. Close the gap with.

  Therefore, even if an axial deviation occurs between the suction passage 60 and the discharge silencer chamber 62 or between the refrigerant introduction hole 94A and the refrigerant discharge hole 96A, the collar members 142 and 143 are driven into the copper pipe 141, The shape of the copper tube 141 can be compulsorily adapted to the suction passage 60, the discharge silencer chamber 62, the refrigerant introduction hole 94A, and the refrigerant discharge hole 96A.

  As a result, since the gaps between the suction passage 60 and the discharge silencer chamber 62 and the copper pipe 141 are closed, the refrigerant inside the suction passage 60 and the discharge silencer chamber 62 leaks into the sealed container 12, Can be prevented from leaking into the suction passage 60 and the discharge silencer chamber 62. Further, since the gap between the refrigerant introduction hole 94A and the copper pipe 141 and the gap between the refrigerant discharge hole 96A and the copper pipe 141 are closed, the refrigerant inside the refrigerant introduction portion 94 and the refrigerant discharge portion 96 is contained in the sealed container 12. And leakage of the refrigerant inside the sealed container 12 into the refrigerant introduction part 94 and the refrigerant discharge part 96 can be prevented.

  Since the gap between the refrigerant introduction hole 94A and the refrigerant introduction portion 94 and the gap between the refrigerant discharge hole 96A and the refrigerant discharge portion 96 are sealed, it is possible to prevent the refrigerant inside the sealed container 12 from leaking outside the sealed container 12. .

  Since the portion to which the refrigerant introduction portion 94 and the refrigerant discharge portion 96 are attached is formed thick in the sealed container 12, the refrigerant introduction portion 94 and the refrigerant discharge portion 96 are made into the sealed container 12 using the thickness of the closed vessel 12. Can be bolted easily.

  Since the rubber O-ring 154 protrudes from the inner wall surface of the refrigerant introduction hole 94A and the refrigerant discharge hole 96A of the hermetic container 12, when the collar member 143 expands the outer diameter of the copper tube 141, the copper O-ring 154 is made of copper. By bringing the outer wall surface of the pipe 141 into contact, the gaps between the refrigerant introduction hole 94A and the refrigerant discharge hole 96A and the copper pipe 141 can be easily closed.

  Note that the present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope in which the object of the present invention can be achieved are included in the present invention.

  Moreover, in each said embodiment, although the rotary compressor 10 was made into the two-stage compression type, it is not restricted to this. That is, the rotary compressor may be a single-stage (one-stage) compression type or a three-stage or more compression type. A single-stage compression rotary compressor has a configuration in which, for example, a refrigerant is introduced from the outside, the introduced refrigerant is compressed by a compression element, discharged into a sealed container, and the refrigerant is discharged from the sealed container to the outside.

  In this embodiment, the O-ring 154 is provided on the inner wall surface of the refrigerant introduction hole 94A and the refrigerant discharge hole 96A. However, the present invention is not limited to this, and a protrusion may be provided over the entire inner wall surface. Even in this case, when the outer diameter of the copper tube 141 is expanded by the collar member 143, the coolant introduction hole 94A, the coolant discharge hole 96A, the copper tube 141, It is possible to easily close the gap between the two.

It is a longitudinal section showing the compressor concerning a 1st embodiment of the present invention. It is a plane sectional view of the 2nd rotation compression element which constitutes the compressor concerning the embodiment. It is an expanded sectional view of the part to which piping of the compressor concerning the embodiment is attached.

Explanation of symbols

10 Rotary compressor (compressor)
12 Sealed container 18 Rotary compression mechanism (compression element)
60 Suction passage (refrigerant passage)
62 Discharge silencer (refrigerant passage)
94 Refrigerant introduction part (external piping part)
94A Refrigerant introduction hole (pipe connection hole)
96 Refrigerant discharge part (external piping part)
96A Refrigerant discharge hole (pipe connection hole)
141 Copper pipe (pipe)
142 Color member (first color)
143 Color member (second color)
154 O-ring

Claims (5)

A compressor comprising a compression element and a sealed container that houses the compression element therein, and driving the compression element to compress and discharge the introduced refrigerant,
A refrigerant passage through which a refrigerant passes is formed in the compression element,
A pipe connection hole is formed in the sealed container,
A pipe having a distal end inserted into the refrigerant passage and a proximal end inserted into the pipe connection hole; and a cylindrical first collar that is driven into the pipe and closes a gap between the pipe and the refrigerant passage. A cylindrical second collar that is driven into the pipe and closes a gap between the pipe and the pipe connection hole, and an external pipe that is attached to the pipe connection hole and connected to the proximal end side of the pipe And a compressor.   The compressor according to claim 1, wherein a space between the pipe connection hole and the external pipe part is sealed.   The compressor according to claim 1 or 2, wherein a portion of the sealed container to which the external pipe portion is attached is formed to be thick.   The compressor according to any one of claims 1 to 3, wherein a protrusion is formed on the inner wall surface of the pipe connection hole of the sealed container over the entire circumference.   The compressor according to any one of claims 1 to 3, wherein a rubber O-ring protrudes from an inner wall surface of the pipe connection hole of the sealed container.

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