Compressor, method for designing compressor, and apparatus

Abstract

According to the present invention: one end side of a sleeve member 60 is defined as a gap dimension management range section 61, and the other end side of the sleeve member 60 is defined as a gap dimension management unnecessary range section 62; a fillet weld part formed by fillet welding is located in the gap dimension management unnecessary range section 62; and an unnecessary management dimension 63 between the sleeve member 60 and a pipe member 7 in the gap dimension management unnecessary range section 62 is made to be larger than a required management dimension 64 between the sleeve member 60 and a pipe member 7 in the gap dimension management range section 61, whereby, when the sleeve member 60 is welded to a sealed container 1 and pipe members 2, 7 are fitted to the sleeve member 60 thereby attaching the pipe members 2, 7 to the sealed container 1, the influence of distortion due to welding can be avoided and the fitting of the pipe members 2, 7 and the sleeve member 60 can be performed properly.

Description

Compressor, compressor design method, and device

[0001] The present invention relates to a compressor used in cooling devices such as air conditioners and heaters, refrigerators, or refrigeration devices such as heat pump water heaters, a compressor design method, and a compressor.

[0002] The scroll compressors of Patent Documents 1 and 2 have a refrigerant suction pipe and an injection pipe connected to the top lid of a sealed container. In Patent Document 2, a suction pipe joint connecting the suction pipe is fixed by welding to a through hole formed in the lid, and the injection pipe and a joint pipe through which the injection pipe passes are fixed by brazing. Note that the scroll compressors of Patent Documents 1 and 2 do not use a sleeve material.

[0003] JP 2014-129751 A JP 2010-151043 A

[0004] When connecting a refrigerant suction pipe or an injection pipe to a sealed container by welding a sleeve material to the sealed container and fitting the refrigerant suction pipe or the injection pipe into the sleeve material, distortion caused by welding can reduce the inner diameter of the sleeve material, resulting in the problem that the refrigerant suction pipe or the injection pipe cannot be fitted sufficiently.

[0005] Therefore, an object of the present invention is to provide a compressor, a compressor design method, and equipment that can avoid the effects of distortion caused by welding and can sufficiently fit the tube material into the sleeve material when attaching the tube material to the sealed container by welding the sleeve material to the sealed container and fitting the tube material into the sleeve material.

[0006] The compressor of the present invention described in claim 1 has, inside a sealed container 1, a compression mechanism unit 10 that compresses a refrigerant, and an electric mechanism unit 20 that drives the compression mechanism unit 10, wherein a pipe penetration opening 8 is formed in the sealed container 1, a sleeve material 60 is arranged in the pipe penetration opening 8, pipe materials 2, 7 are fitted into the sleeve material 60, and the outer surface of the sealed container 1 and the outer peripheral surface of the sleeve material 60 are joined by fillet welding, wherein one end side of the sleeve material 60 is a clearance dimension control range portion 61 and the other end side of the sleeve material 60 is a clearance dimension control-free range portion 62, the fillet welded portion by the fillet welding is located in the clearance dimension control-free range portion 62, and the control-required dimension 64 between the sleeve material 60 and the pipe material 7 in the clearance dimension control range portion 61 is larger than the control-required dimension 63 between the sleeve material 60 and the pipe material 7 in the clearance dimension control-free range portion 62. The present invention according to claim 2 is characterized in that, in the compressor according to claim 1, an outer diameter 7y of the pipe material 7 in the clearance dimension control-free range 62 is smaller than an outer diameter 7x of the pipe material 7 in the clearance dimension control range 61. The present invention according to claim 3 is characterized in the compressor according to claim 1, wherein an inner diameter of the sleeve material 60 in the clearance dimension control range 62 is larger than an inner diameter of the sleeve material 60 in the clearance dimension control range 61. The present invention according to claim 4 is characterized in the compressor according to claim 1, wherein the outer diameter 7x of the pipe material 7 in the clearance dimension control range 61 is 12 mm or more and less than 16 mm, and the fitting depth between the pipe material 7 and the sleeve material 60 in the clearance dimension control range 61 is 8 mm or more. The present invention described in claim 5 is characterized in that, in the compressor described in claim 1, the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 16 mm or more and less than 25 mm, and the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 is 10 mm or more.The present invention as set forth in claim 6 is characterized in that, in the compressor as set forth in claim 1, the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 25 mm or more and less than 35 mm, and the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 is 12 mm or more. The present invention as set forth in claim 7 is characterized in that, in the compressor as set forth in claim 1, the inner side end portions of the pipe materials 2, 7 in the sealed container 1 are fixed by the compression mechanism portion 10. The present invention described in claim 8 is characterized in that, in the compressor described in claim 1, the pipe material penetration openings 8 include a first pipe material penetration opening 8a and a second pipe material penetration opening 8b, and the pipe materials 2, 7 include a first pipe material 7 placed in the first pipe material penetration opening 8a and a second pipe material 2 placed in the second pipe material penetration opening 8b, and when the outer diameter 7x, 7y of the first pipe material 7 is smaller than the outer diameter of the second pipe material 2, the sleeve material 60 into which the first pipe material 7 is fitted has the unnecessary control dimension 63 between the sleeve material 60 and the pipe material 7 in the gap dimension control unnecessary range portion 62 larger than the control required dimension 64 between the sleeve material 60 and the pipe material 7 in the gap dimension control range portion 61. A compressor design method of the present invention as set forth in claim 9 is the compressor design method of any one of claims 1 to 8, characterized in that a range in which the inner diameter dimension of the sleeve material 60 after the fillet welding is within design dimension 64 of the sleeve material 60 is set as the gap dimension control range 61, and a length of the gap dimension control range 61 is determined. An apparatus of the present invention as set forth in claim 10 is an apparatus using the compressor as set forth in any one of claims 1 to 8, characterized in that the compressor, condenser 51, pressure reducing device 52, and evaporator 54 are connected in a ring shape by refrigerant piping 55.

[0007] According to the present invention, the influence of distortion caused by welding of the sleeve material can be avoided, and the tube material and the sleeve material can be fitted together sufficiently.

[0008] FIG. 1 is a longitudinal sectional view of a scroll compressor according to an embodiment of the present invention; FIG. 2 is an enlarged sectional view of a main part of the scroll compressor shown in FIG. 1; and FIG. 3 is an enlarged sectional view of a main part of the scroll compressor shown in FIG. 1, and a diagram showing the change in the inner diameter of the sleeve material.

[0009] In a compressor according to a first embodiment of the present invention, one end of the sleeve is defined as a clearance control range and the other end of the sleeve is defined as a clearance control-free range, and a fillet weld is formed in the clearance control-free range, so that the control-required dimension between the sleeve and the pipe in the clearance control-free range is larger than the control-required dimension between the sleeve and the pipe in the clearance control range. This embodiment avoids the effects of distortion caused by welding the sleeve, and allows the pipe and sleeve to be fitted together satisfactorily.

[0010] In a second embodiment of the present invention, the outer diameter of the tubing in the clearance dimension control-free range is made smaller than the outer diameter of the tubing in the clearance dimension control-free range in the compressor of the first embodiment. According to this embodiment, by making the outer diameter of the tubing in the clearance dimension control-free range smaller than the outer diameter of the tubing in the clearance dimension control-free range, the unnecessary control dimension between the sleeve and the tubing in the clearance dimension control-free range can be made larger, and the tubing can be fitted into the sleeve even if distortion occurs due to welding.

[0011] In a third embodiment of the present invention, the inner diameter of the sleeve material in the clearance control-free range is made larger than the inner diameter of the sleeve material in the clearance control-free range in the compressor of the first embodiment. According to this embodiment, by making the inner diameter of the sleeve material in the clearance control-free range larger than the inner diameter of the sleeve material in the clearance control-free range, the unnecessary control dimension between the sleeve material and the pipe material in the clearance control-free range can be made larger, and the pipe material can be fitted into the sleeve material even if distortion occurs due to welding.

[0012] In a fourth embodiment of the present invention, in the compressor according to the first embodiment, the outer diameter of the tubing in the clearance dimension control range is set to 12 mm or more and less than 16 mm, and the fitting depth between the tubing and the sleeve in the clearance dimension control range is set to 8 mm or more. According to this embodiment, for tubing with an outer diameter of 12 mm or more and less than 16 mm, a secure fit can be achieved by setting the fitting depth between the tubing and the sleeve to 8 mm or more.

[0013] In a fifth embodiment of the present invention, in the compressor according to the first embodiment, the outer diameter of the tubing in the clearance dimension control range is set to 16 mm or more and less than 25 mm, and the fitting depth between the tubing and the sleeve in the clearance dimension control range is set to 10 mm or more. According to this embodiment, for tubing with an outer diameter of 16 mm or more and less than 25 mm, a reliable fit can be achieved by setting the fitting depth between the tubing and the sleeve to 10 mm or more.

[0014] In a sixth embodiment of the present invention, in the compressor according to the first embodiment, the outer diameter of the tubing in the clearance dimension control range is set to 25 mm or more and less than 35 mm, and the fitting depth between the tubing and the sleeve in the clearance dimension control range is set to 12 mm or more. According to this embodiment, for tubing with an outer diameter of 25 mm or more and less than 35 mm, a reliable fit can be achieved by setting the fitting depth between the tubing and the sleeve to 12 mm or more.

[0015] In a seventh embodiment of the present invention, in the compressor according to the first embodiment, the inner end of the sealed container of the tubular material is fixed by the compression mechanism. When the inner end of the sealed container of the tubular material is fixed by the compression mechanism, assembly becomes more difficult due to distortion of the sleeve material. However, according to this embodiment, the tubular material and the sleeve material can be fitted together sufficiently.

[0016] In an eighth embodiment of the present invention, the compressor according to the first embodiment has a first pipe material through-hole and a second pipe material through-hole as the pipe material through-holes, a first pipe material placed in the first pipe material through-hole and a second pipe material placed in the second pipe material through-hole, and when the outer diameter of the first pipe material is smaller than the outer diameter of the second pipe material, the unnecessary control dimension between the sleeve material and the pipe material in the clearance dimension control-unnecessary range is made larger than the control dimension between the sleeve material and the pipe material in the clearance dimension control range for the sleeve material into which the first pipe material is fitted. According to this embodiment, it is possible to reliably fit a pipe material having a small outer diameter that is difficult to fit into the sleeve material.

[0017] A compressor design method according to a ninth embodiment of the present invention is the compressor design method according to any one of the first to eighth embodiments, in which the range in which the inner diameter dimension of the sleeve material after fillet welding falls within the design dimension of the sleeve material is defined as the clearance dimension control range portion, and the length of the clearance dimension control range portion is determined. According to this embodiment, the influence of distortion due to welding of the sleeve material can be avoided, and the tube material can be sufficiently fitted into the sleeve material.

[0018] A tenth embodiment of the present invention is a device using the compressor according to any one of the first to eighth embodiments, in which the compressor, a condenser, a pressure reducing device, and an evaporator are connected in a circular arrangement by refrigerant piping. According to this embodiment, a highly safe device can be provided.

[0019] A compressor according to one embodiment of the present invention will be described below. However, the present invention is not limited to this embodiment. In addition, although a scroll compressor is used in this embodiment, a rotary compressor, a reciprocating compressor, or other compressors may also be used. The present invention is also applicable to horizontal compressors and, for example, vehicle-mounted compressors.

[0020] FIG. 1 is a longitudinal cross-sectional view of a scroll compressor according to this embodiment. Arranged within a sealed container 1 are a compression mechanism 10 that compresses a refrigerant, an electric mechanism 20 that drives the compression mechanism 10, and a main shaft 30 that is rotated by the electric mechanism 20 to operate the compression mechanism 10. The sealed container 1 comprises a cylindrical body 1a extending vertically, an upper lid 1c that closes the upper opening of the body 1a, and a lower lid 1b that closes the lower opening of the body 1a. The sealed container 1 is provided with a refrigerant suction pipe (second pipe, pipe) 2 that introduces refrigerant into the compression mechanism 10, a refrigerant discharge pipe 3 that discharges refrigerant compressed by the compression mechanism 10 out of the sealed container 1, and an injection pipe (first pipe, pipe) 7 that injects intermediate-pressure refrigerant into the compression mechanism 10. The compression mechanism 10 includes a fixed scroll 11 and an orbiting scroll 12. The orbiting scroll 12 is driven to orbit by a main shaft 30. The electric mechanism 20 includes a stator 21 fixed to the sealed container 1 and a rotor 22 disposed inside the stator 21. The main shaft 30 is fixed to the rotor 22.

[0021] A main bearing 40 that supports the fixed scroll 11 and the orbiting scroll 12 is provided below the fixed scroll 11 and the orbiting scroll 12. The main bearing 40 is formed with a bearing portion 41 that supports the main shaft 30, a boss accommodating portion 42, a ring-shaped recess 43 for sealing, and a ring-shaped recess 45 for a rotation restraining member. The main bearing 40 is fixed to the sealed container 1 by welding or shrink fitting.

[0022] The fixed scroll 11 includes a disk-shaped fixed scroll end plate 11a, a fixed spiral wrap 11b extending from the fixed scroll end plate 11a, and an outer peripheral wall portion 11c extending from the fixed spiral wrap 11b. A discharge port 14 is formed approximately at the center of the fixed scroll end plate 11a. The orbiting scroll 12 includes a disk-shaped orbiting scroll end plate 12a, an orbiting spiral wrap 12b extending from the wrap-side end surface of the orbiting scroll end plate 12a, and a cylindrical boss portion 12c formed on the opposite side of the wrap-side end surface of the orbiting scroll end plate 12a. The fixed spiral wrap 11b of the fixed scroll 11 and the orbiting spiral wrap 12b of the orbiting scroll 12 are intermeshed with each other, forming multiple compression chambers 15 between the fixed spiral wrap 11b and the orbiting spiral wrap 12b. The boss portion 12c is formed approximately at the center of the orbiting scroll end plate 12a. The boss portion 12 c is accommodated in the boss accommodating portion 42 .

[0023] The main shaft 30 is formed with a journal portion 31 disposed in the bearing portion 41, an eccentric shaft 32 inserted into the boss portion 12c, and a main shaft oil supply hole 34 extending from a lower end portion 33 of the main shaft 30 to the eccentric shaft 32. The eccentric shaft 32 is formed at the upper end of the main shaft 30, and the journal portion 31 is formed below the eccentric shaft 32.

[0024] The fixed scroll 11 is fixed to the main bearing 40 at its outer peripheral wall portion 11c using a plurality of bolts 16. On the other hand, the orbiting scroll 12 is supported by the fixed scroll 11 via a rotation restraint member 17 such as an Oldham ring. The rotation restraint member 17, which restrains the rotation of the orbiting scroll 12, is disposed in a ring-shaped recess 45 for the rotation restraint member, and is provided between the fixed scroll 11 and the main bearing 40. This allows the orbiting scroll 12 to orbit without rotating on its own axis relative to the fixed scroll 11. The lower end portion 33 of the main shaft 30 is journaled by an auxiliary bearing 18 disposed at the bottom of the sealed container 1.

[0025] An oil reservoir 4 for storing lubricating oil is formed at the bottom of the sealed container 1. A positive displacement oil pump 5 is provided at the lower end of the main shaft 30. The oil pump 5 is positioned so that its suction port is located within the oil reservoir 4. The oil pump 5 is driven by the main shaft 30. The oil pump 5 can reliably draw up the lubricating oil in the oil reservoir 4 provided at the bottom of the sealed container 1 regardless of the pressure conditions or operating speed, eliminating concerns about running out of oil. The lubricating oil drawn up by the oil pump 5 is supplied to the bearing of the sub-bearing 18, the bearing portion 41, and the boss portion 12c via the main shaft oil supply hole 34 formed in the main shaft 30.

[0026] Refrigerant drawn into the refrigerant suction pipe 2 is guided from the suction port 15a to the compression chamber 15. The compression chamber 15 moves from the outer periphery toward the center while decreasing in volume, and when the refrigerant reaches a predetermined pressure in the compression chamber 15, it is discharged from the discharge port 14 provided in the center of the fixed scroll 11 to the discharge chamber 6. A discharge valve (not shown) is provided in the discharge port 14. When the refrigerant reaches a predetermined pressure in the compression chamber 15, it pushes open the discharge valve and is discharged into the discharge chamber 6. The refrigerant discharged into the discharge chamber 6 is led to the upper part of the sealed container 1, passes through a refrigerant passage (not shown) formed in the compression mechanism 10, reaches the periphery of the electric mechanism 20, and is discharged from the refrigerant discharge pipe 3.

[0027] In the scroll compressor of this embodiment, the boss housing 42 is a high-pressure region, and the outer periphery of the orbiting scroll 12, where the rotation restraint member 17 is disposed, is an intermediate-pressure region. The orbiting scroll 12 is pressed against the fixed scroll 11 by the pressures in the high-pressure and intermediate-pressure regions. The eccentric shaft 32 is inserted into the boss 12c via an orbiting bearing so as to be rotatable. An oil groove 38 is formed in the outer periphery of the eccentric shaft 32. A ring-shaped sealing recess 43 is formed in the thrust surface of the main bearing 40, which receives the thrust force of the orbiting scroll end plate 12a. A ring-shaped sealing member is provided in the ring-shaped sealing recess 43. The sealing member is disposed on the outer periphery of the boss housing 42. The sealed vessel 1 is filled with the same high-pressure refrigerant as the refrigerant discharged into the discharge chamber 6. The main shaft oil supply hole 34 opens to the upper end of the eccentric shaft 32, so that the pressure in the boss 12c is a high-pressure region equivalent to the pressure of the discharged refrigerant. The lubricating oil introduced into the boss portion 12c through the main shaft oil supply hole 34 is supplied to the orbiting bearing and the boss accommodating portion 42 by an oil groove 38 formed on the outer circumferential surface of the eccentric shaft 32. A seal member is provided on the outer periphery of the boss accommodating portion 42, so the boss accommodating portion 42 is a high-pressure region.

[0028] In the compressor of this embodiment, a condenser 51, a pressure reducing device 52, a gas-liquid separator 53, and an evaporator 54 are connected in a ring shape by refrigerant piping 55. The condenser 51 condenses the refrigerant discharged from the discharge pipe 3. The pressure reducing device 52 reduces the pressure of the refrigerant condensed by the condenser 51. The evaporator 54 evaporates the refrigerant reduced in pressure by the pressure reducing device 52. The refrigerant evaporated by the evaporator 54 is returned to the compression mechanism 10 via the refrigerant suction pipe 2. The gas-liquid separator 53 separates the refrigerant condensed by the condenser 51 and reduced in pressure by the pressure reducing device 52 into a partially evaporated gas refrigerant and a liquid refrigerant. The liquid refrigerant further passes through the pressure reducing device 52 to become a low-pressure refrigerant and is guided to the evaporator 54. Meanwhile, the gas refrigerant separated by the gas-liquid separator 53 passes through the injection pipe 7 and is guided to the compression chamber 15, which is in an intermediate-pressure state. The injection pipe 7 may be provided with a blocking valve or a pressure reducing device 52 to adjust or stop the injection pressure, and when a blocking valve or the like is provided, the injection pipe 7 is fixed to the fixed scroll 11 via another member. Also, a plurality of injection pipes 7 may be provided.

[0029] 2 is an enlarged cross-sectional view of a main portion of the scroll compressor shown in FIG. 1 . A pipe opening 8 is formed in the top cover 1c of the sealed container 1. A sleeve 60 is disposed in the pipe opening 8, and the pipes 2 and 7 are fitted into the sleeve 60. The outer surface of the sealed container 1 and the outer peripheral surface of the sleeve 60 are joined by a fillet weld 9. In this embodiment, the refrigerant suction tube 2 and the injection tube 7 are pipes. In the following description, the refrigerant suction tube 2 will be referred to as the pipe 2 and the injection tube 7 will be referred to as the pipe 7. In this embodiment, the pipe openings 8 include a first pipe opening 8a and a second pipe opening 8b. The sleeve 60a, into which the pipe 7 is fitted, is disposed in the first pipe opening 8a, and the sleeve 60b, into which the pipe 2 is fitted, is disposed in the second pipe opening 8b. A refrigerant pipe 55 for guiding the gas refrigerant separated in the gas-liquid separator 53 is connected to the pipe 7, and a refrigerant pipe 55 for guiding the refrigerant evaporated in the evaporator 54 is connected to the pipe 2.

[0030] FIG. 3 is an enlarged cross-sectional view of a key portion of the scroll compressor shown in FIG. 1 and a diagram illustrating the change in the inner diameter of the sleeve material. The graph in FIG. 3 shows how the inner diameter of the sleeve material 60, corresponding to the position in the cross-sectional view, is distorted and changed due to fillet welding. One end of the sleeve material 60 is designated a clearance dimension control range 61, and the other end of the sleeve material 60 is designated a clearance dimension control-free range 62. The fillet weld 9 formed by fillet welding is located in the clearance dimension control-free range 62. The non-controllable dimension 63 between the sleeve material 60 and the pipe material 7 in the clearance dimension control-free range 62 is larger than the control-required dimension 64 between the sleeve material 60 and the pipe material 7 in the clearance dimension control-free range 61. In FIG. 3, the outer diameter 7y of the pipe material 7 in the clearance dimension control-free range 62 is smaller than the outer diameter 7x of the pipe material 7 in the clearance dimension control-free range 61. However, the inner diameter of the sleeve material 60 in the clearance dimension control-free range 62 may be larger than the inner diameter of the sleeve material 60 in the clearance dimension control-free range 61. In this way, by making the outer diameter 7y of the pipe material 7 in the gap dimension control-free range 62 smaller than the outer diameter 7x of the pipe material 7 in the gap dimension control range 61, the unnecessary control dimension 63 between the sleeve material 60 and the pipe material 7 in the gap dimension control-free range 62 can be made larger, and the pipe material 7 can be fitted into the sleeve material 60 even if distortion occurs due to welding. Also, by making the inner diameter of the sleeve material 60 in the gap dimension control-free range 62 larger than the inner diameter of the sleeve material 60 in the gap dimension control-free range 62, the unnecessary control dimension 63 between the sleeve material 60 and the pipe material 7 in the gap dimension control-free range 62 can be made larger, and the pipe material 7 can be fitted into the sleeve material 60 even if distortion occurs due to welding.

[0031] In this embodiment, the outer diameter 7x of the pipe material 7 is 13 mm. In this way, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 12 mm or more and less than 16 mm, the control requirement dimension 64 is set to 0.025 mm or more and 0.225 mm or less, and the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 is set to 8 mm or more, thereby ensuring a reliable fit. Furthermore, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 16 mm or more and less than 25 mm, the control requirement dimension 64 is set to 0.025 mm or more and 0.225 mm or less, and the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 is set to 10 mm or more, thereby ensuring a reliable fit. Furthermore, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 25 mm or more and less than 35 mm, a reliable fit can be achieved by setting the management requirement dimension 64 to 0.025 mm or more and 0.275 mm or less, and setting the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 to 12 mm or more. Furthermore, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 35 mm or more and less than 45 mm, a reliable fit can be achieved by setting the management requirement dimension 64 to 0.025 mm or more and 0.275 mm or less, and setting the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 to 14 mm or more. Furthermore, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 8 mm or more and less than 12 mm, a reliable fit can be achieved by setting the management requirement dimension 64 to 0.025 mm or more and 0.175 mm or less, and setting the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 to 7 mm or more. Furthermore, when the outer diameter 7x of the pipe material 7 in the gap dimension control range portion 61 is 5 mm or more and less than 8 mm, a reliable fit can be achieved by setting the management requirement dimension 64 to 0.025 mm or more and 0.175 mm or less, and setting the fitting depth between the pipe material 7 and the sleeve material 60 in the gap dimension control range portion 61 to 6 mm or more.

[0032] In this embodiment, the top cover 1c of the sealed container 1 is made of a steel plate (SPV355) having a thickness of 4.5 mm, the sleeve material 60 is made of a carbon steel material (S10C to S30C) having a thickness of 6.4 to 6.8 mm, and the pipe material 7 is made of the same carbon steel material (S10C to S30C) as the sleeve material 60. As shown in Fig. 3, as a design method, a range in which the inner diameter dimension of the sleeve material 60 after fillet welding falls within a control dimension (design dimension) 64 of the sleeve material 60 is defined as a clearance dimension control range 61, and by determining the length of the clearance dimension control range 61, it is possible to avoid the influence of distortion due to welding of the sleeve material 60 and to ensure sufficient fitting of the pipe material 2 and the sleeve material 60.

[0033] As shown in Figure 2, when the inner end portions of the pipe materials 2 and 7 in the sealed container 1 are fixed by the compression mechanism 10, assembly becomes even more difficult due to distortion of the sleeve material 60. However, as in this embodiment, by making the unnecessary control dimension 63 between the sleeve material 60 and the pipe material 7 in the gap dimension control-free range portion 62 larger than the control-required dimension 64 between the sleeve material 60 and the pipe material 7 in the gap dimension control range portion 61, the pipe materials 2 and 7 can be sufficiently fitted into the sleeve material 60. 2, the pipes 2, 7 include a first pipe 7 placed in the first pipe penetration opening 8a and a second pipe 2 placed in the second pipe penetration opening 8b, and when the outer diameter 7x of the first pipe 7 is smaller than the outer diameter of the second pipe 2, the unnecessary control dimension 63 between the sleeve 60a and the pipe 7 in the clearance dimension control unnecessary range 62 is made larger than the necessary control dimension 64 between the sleeve 60a and the pipe 7 in the clearance dimension control range 61 for the sleeve 60a into which the first pipe 7 is fitted. That is, it is preferable to make the unnecessary control dimension 63 larger than the necessary control dimension 64 for both the first pipe 7 and the second pipe 2. However, when the unnecessary control dimension 63 is made larger than the necessary control dimension 64 for only one of the pipes 2, 7, by making the unnecessary control dimension 63 larger than the necessary control dimension 64 for the pipe 2, 7 with the smaller outer diameter, it is possible to reliably fit the sleeve into a pipe that is difficult to fit because of its small outer diameter.

[0034] The compressor of the present invention is useful for appliances such as hot water heating systems, indoor air conditioners, vehicle air conditioners, water heaters, refrigerators, showcases, chillers, and freezers.

[0035] REFERENCE SIGNS LIST 1 Sealed container 1a Body 1b Bottom cover 1c Top cover 2 Refrigerant suction pipe (pipe material, second pipe material) 3 Refrigerant discharge pipe 4 Oil storage section 5 Oil pump 6 Discharge chamber 7 Injection pipe (pipe material, first pipe material) 7x Outer diameter (outer diameter of pipe material in clearance dimension control range section) 7y Outer diameter (outer diameter of pipe material in clearance dimension control unnecessary range section) 8 Pipe material penetration opening 8a First pipe material penetration opening 8b Second pipe material penetration opening 9 Fillet weld section 10 Compression mechanism section 11 Fixed scroll 11a Fixed scroll end plate 11b Fixed spiral wrap 11c Outer peripheral wall section 12 Orbiting scroll 12a Orbiting scroll end plate 12b Orbiting spiral wrap 12c Boss section 14 Discharge port 15 Compression chamber 15a Suction port 16 Bolt 17 Rotation restraint member 18 Sub-bearing 20 Electric mechanism 21 Stator 22 Rotor 30 Main shaft 31 Journal 32 Eccentric shaft 33 Lower end 34 Main shaft oil supply hole 38 Oil groove 40 Main bearing 41 Bearing 42 Boss accommodating portion 43 Ring-shaped recess for sealing 45 Ring-shaped recess for rotation restraint member 51 Condenser 52 Pressure reducing device 53 Gas-liquid separator 54 Evaporator 55 Refrigerant piping 60 Sleeve material 60a Sleeve material 60b Sleeve material 61 Clearance dimension control range portion 62 Clearance dimension control unnecessary range portion 63 Unnecessary control dimension 64 Control required dimension (design dimension)

Claims

1. A compressor having a compression mechanism for compressing a refrigerant and an electric mechanism for driving the compression mechanism inside a sealed container, wherein a pipe penetration opening is formed in the sealed container, a sleeve material is placed in the pipe penetration opening, a pipe material is fitted into the sleeve material, and the outer surface of the sealed container and the outer peripheral surface of the sleeve material are joined by fillet welding, wherein one end side of the sleeve material is a clearance dimension control range part and the other end side of the sleeve material is a clearance dimension control-free range part, the fillet welded part formed by the fillet welding is located in the clearance dimension control-free range part, and the control-required dimension between the sleeve material and the pipe material in the clearance dimension control-free range part is larger than the control-required dimension between the sleeve material and the pipe material in the clearance dimension control range part.

2. The compressor according to claim 1, wherein the outer diameter of the pipe material in the clearance dimension control unnecessary range is smaller than the outer diameter of the pipe material in the clearance dimension control range.

3. The compressor according to claim 1, wherein the inner diameter of the sleeve material in the clearance dimension control-unnecessary range is larger than the inner diameter of the sleeve material in the clearance dimension control-unnecessary range.

4. The compressor according to claim 1, characterized in that the outer diameter of the pipe material in the gap dimension control range section is 12 mm or more and less than 16 mm, and the fitting depth between the pipe material and the sleeve material in the gap dimension control range section is 8 mm or more.

5. A compressor as described in claim 1, characterized in that the outer diameter of the pipe material in the gap dimension control range section is 16 mm or more and less than 25 mm, and the fitting depth between the pipe material and the sleeve material in the gap dimension control range section is 10 mm or more.

6. A compressor as described in claim 1, characterized in that the outer diameter of the pipe material in the gap dimension control range section is 25 mm or more and less than 35 mm, and the fitting depth between the pipe material and the sleeve material in the gap dimension control range section is 12 mm or more.

7. The compressor according to claim 1, wherein the end of the pipe material on the inside side of the sealed container is fixed by the compression mechanism.

8. The compressor according to claim 1, characterized in that the pipe material penetration openings include a first pipe material penetration opening and a second pipe material penetration opening, the pipe materials include a first pipe material placed in the first pipe material penetration opening and a second pipe material placed in the second pipe material penetration opening, and when the outer diameter of the first pipe material is smaller than the outer diameter of the second pipe material, the sleeve material into which the first pipe material is fitted has a larger unnecessary control dimension between the sleeve material and the pipe material in the clearance dimension control unnecessary range than the control required dimension between the sleeve material and the pipe material in the clearance dimension control range.

9. A compressor design method according to any one of claims 1 to 8, characterized in that the range in which the inner diameter dimension of the sleeve material after the fillet welding falls within the design dimension of the sleeve material is defined as the clearance dimension control range, and the length of the clearance dimension control range is determined.

10. Equipment using the compressor according to any one of claims 1 to 8, characterized in that the compressor, condenser, pressure reducing device, and evaporator are connected in a circular configuration by refrigerant piping.

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