JP2005220762A - Compressor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compressor wherein the number of terminal mounting bolts is reduced by disusing a mold supporting material when mounting a terminal on the end cap of a sealed container. <P>SOLUTION: A flange portion 3c of the end cap 3 is fixed to an opening end 2c of a container 2 with the plurality of bolts 1a to form the sealed container 1. The end cap 3 has a hole 3a in the center and a base 23a of the terminal 23 is fastened fixedly to the inner face of the end cap 3 with the plurality of bolts 3b. An internal lead 24 and an external lead 25 are connected to connection terminals 23c of the terminal 23, respectively, and a mold material 26 is filled and sealed into a recessed portion encircled by the base 23a of the terminal 23 and the hole 3a of the end cap 3. Thus, the need of the conventional mold supporting material is eliminated and the number of the mounting bolts 3b is reduced because internal pressure operates on the terminal 23 for reinforcement. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a compressor, and more particularly to a compressor characterized by a terminal mounting structure that is attached to an end cap of a hermetic container in the compressor.

  Conventionally, a compressor having a configuration in which an electric element and a compression element driven by the electric element are provided in an airtight container is known. In this type of compressor, an end cap is attached to an opening end of a container that is generally formed in a generally cylindrical shape to form a sealed container, and a terminal for energizing the electric element is attached to the end cap.

  In order to attach the terminal to the end cap, conventionally, for example, as shown in FIG. 3, a hole B for attachment is provided in the center portion of the end cap A, and the terminal C is attached to the base D for attaching to the end cap A. A plurality of connection terminals E provided so as to penetrate therethrough are provided, and a base D of the terminal C is fixed to the outside of the end cap A through bolts G together with a substantially cylindrical support material F.

And after connecting the external lead wire H to the edge part of the terminal E for a connection located in the inside of the support material F, it seals by filling the mold material I in the support material F and solidifying. An internal lead wire is connected to the end portion of the connection terminal E located in the hole B of the end cap A, and the internal lead wire J is an electric element disposed in the sealed container. Connected to. A similar technique is disclosed in Patent Document 1.
JP 2002-276549 A

  According to the above-described conventional terminal mounting structure, since the mold support I for filling and solidifying the mold I is required, the manufacturing cost increases. Also, the terminal C is tightened to the outside of the end cap A with bolts G, and high pressure due to compressed gas is applied to the base D of the terminal C from the inside of the end cap A, so the number of bolts G is increased and the base D is attached. The strength must be kept strong. As the number of bolts G increases, the number of bolt insertion holes provided in the flange portion of the support member F and the base D of the terminal C and the bolt screw holes provided in the end cap A increase. Alignment becomes troublesome, resulting in reduced workability and increased costs.

  The present invention was made in order to eliminate such problems in the prior art. In attaching the terminal to the end cap of the hermetic container, the molding support material is eliminated, and the number of bolts for attaching the terminal is reduced. It is an object of the present invention to provide a compressor that can be reduced.

  In order to achieve the above object, claim 1 of the present invention is a compressor in which a hole is provided in an end cap of a sealed container, and a terminal is attached to the hole, and the terminal is fixed inside the end cap. The recess surrounded by the terminal and the hole is filled with a molding material and sealed.

  According to a second aspect of the present invention, in the compressor according to the first aspect, the terminal includes a base and a plurality of connection terminals disposed through the base, and the base is provided inside the end cap. After fixing with a bolt and connecting an external lead wire to a connection terminal located in the hole, the concave portion is filled with a molding material and sealed.

  According to the first aspect of the present invention, when the terminal is attached to the end cap of the sealed container, the terminal is fixed inside the end cap, and the mold is filled in the recess surrounded by the terminal and the hole provided in the end cap. Therefore, the conventional mold support material is unnecessary. In addition, since the terminal is attached to the inner side of the end cap, the terminal is pressed against the inner surface of the end cap by the internal pressure of the sealed container. Therefore, the terminal mounting strength may be lower than that of the terminal attached. For this reason, the number of bolts for mounting the terminal can be reduced, the number of bolt insertion holes provided in the terminal and the number of screw holes for screwing provided in the end cap are reduced, and workability is improved and costs are reduced. Can be achieved.

  According to a second aspect of the present invention, in the compressor according to the first aspect, the terminal includes a base and a plurality of connection terminals arranged through the base, and the base is connected to the end cap. By fixing the inner side with a bolt, a recess for mold filling is formed by the hole provided in the base and the end cap. After connecting the external lead wire to the connection terminal located in the recess, the recess can be filled with a molding material and sealed.

  Next, an embodiment of a compressor according to the present invention will be described with reference to the accompanying drawings. FIG. 1 in the accompanying drawings is a schematic longitudinal sectional view showing an embodiment in which the present invention is applied to an internal intermediate pressure type two-stage rotary compressor. FIG. 2 is a schematic exploded sectional view of an end cap and a terminal in the two-stage rotary compressor of FIG. FIG. 3 is a schematic sectional view showing a terminal mounting structure in a conventional example.

  In FIG. 1, reference numeral 1 denotes an airtight container, and a container 2 formed in a substantially cylindrical shape and a substantially disk-like or substantially bowl-like shape fastened to the opening end 2 c of the container 2 by a plurality of bolts 1 a. The container 2 includes an electric element 4 and a rotary compression element 5 driven by the electric element 4. When the container 2 and the end cap 3 are formed of an aluminum material, for example, an aluminum alloy containing Si, Mg, and Cu can be used.

  The electric element 4 is composed of a stator 4a fixed to the inner wall surface of the container 2, and a rotor 4b disposed at a slight interval in the center of the stator 4a. The center of the rotor 4b is a rotating shaft. 6 and the lower part of the rotating shaft 6 extends vertically downward.

  The rotary compression element 5 includes a first rotary compression unit 7 and a second rotary compression unit 8 disposed thereon via a partition plate 9. The first rotary compression unit 7 is a first rotary compression unit 7. 1 cylinder 10, and a first roller 11 that eccentrically rotates inside the first cylinder 10 by being fitted to a first eccentric portion 6 a provided on the rotary shaft 6, The rotary compression unit 8 includes a second cylinder 12 and a second roller 13 that is fitted into a second eccentric portion 6 b provided on the rotary shaft 6 and rotates eccentrically inside the second cylinder 12. ing. Further, a vane (not shown) urged by a spring is always in contact with the first roller 11 so that the interior of the first cylinder 10 is divided into a low pressure chamber and a high pressure chamber. The second roller 12 is partitioned into a low-pressure chamber and a high-pressure chamber by a vane (not shown) biased by a spring constantly contacting the second roller 13. The first eccentric portion 6a and the second eccentric portion 6b provided on the rotating shaft 6 are shifted in phase by 180 °.

  In addition, a first support member 14 is disposed below the first rotary compression unit 7, and a second support member 15 is disposed above the second rotary compression unit 8. The first support member 14 and the second support member 15 are configured such that the first rotary compression portion 7, the partition plate 9, and the second rotary compression portion 8 are sandwiched between the inner wall surface of the container 2. The main frame 16 is fixed integrally to the main frame 16 by tightening with a plurality of bolts 16a.

  The first support member 14 has a bearing portion 14a at the center, and a bush is fitted inside the bearing portion 14a to support the lower end portion of the rotary shaft 6. Further, a silencing chamber 14b is provided on the lower surface side of the first support member 14 along the outer periphery of the bearing portion 14a. The silencing chamber 14b communicates with the outlet of the high-pressure chamber in the first cylinder 10. The discharge port 14c provided in the first support member 14 communicates with the discharge port 14c. The silencing chamber 14b is covered with an opening surface by a cover plate 17 fixed to the lower surface of the first support member 14 with bolts 17a, and a hole 17b is provided in the center of the cover plate 17 corresponding to the bearing portion 14a. Yes. Further, the first support member 14 is provided with a suction port 14d, and this suction port 14d communicates with an inlet of a low pressure chamber in the first cylinder 10 through a passage 10a provided in the first cylinder 10. doing. The rotary shaft 6 is provided with a shaft hole 6c, the lower end portion of which is expanded in diameter, and a lubricating oil pumping member 18 is mounted therein.

  The second support member 15 has a bearing portion 15a at the center, and this bearing portion 15a projects upward through the center hole of the main frame 16, and a bush is fitted inside the bearing portion 15a. The rotary shaft 6 is supported. Further, a silencing chamber 15b is provided on the upper surface side of the second support member 15 along the outer periphery of the bearing portion 15a. The silencing chamber 15b communicates with the outlet of the high pressure chamber in the second cylinder 12. The discharge port 15c provided in the second support member 15 communicates with the discharge port 15c. Further, the second support member 15 is provided with a suction port 15d, and the upper end of the suction port 15d communicates with the inside of the container 2 via a suction passage 16b provided in the main frame 16. The lower end of the suction port 15 d communicates with the inlet of the low pressure chamber in the second cylinder 12 through a passage 12 a provided in the second cylinder 12. The main frame 16 is provided with a discharge passage 16c. The discharge passage 16c communicates a region below the main frame 16 and a region above the main frame 16 inside the container.

  The container 2 is provided with a suction side hole 2a in a side wall portion facing the suction port 14d of the first support member 14, and a sleeve 19 is fixed to the position of the suction side hole 2a by a bolt 19a. The side wall of the second support member 15 facing the discharge port 15c is provided with a discharge-side hole 2b, and the sleeve 20 is fixed to the position of the discharge-side hole 2b by a bolt 20a.

  The suction side sleeve 19 is connected to the inner end portion of the hole 19b and the inlet end portion of the suction port 14d by a suction communication pipe 21, and is connected to the suction communication pipe 21 on the sleeve 19 side for airtightness. An O-ring is fitted to the connection portion, and a collar is fitted to the connection portion with the suction communication pipe 21 on the suction port 14d side. A refrigerant gas introduction pipe (not shown) is connected to the suction side sleeve 19.

  The discharge-side sleeve 20 has an inner end portion of the hole 20b and an outlet end portion of the discharge port 15c connected to each other by a discharge communication tube 22, and the sleeve 20 side is connected to the discharge communication tube 22 to maintain airtightness. An O-ring is fitted to the connection portion, and a collar is fitted to the connection portion with the discharge communication pipe 22 on the discharge port 15c side. A refrigerant gas outlet pipe (not shown) is connected to the discharge-side sleeve 20.

  As shown in FIG. 2, the end cap 3 is provided with a mounting hole 3a in the center, and a terminal 23 is fastened to the inside of the end cap 3 by a plurality of bolts 3b (FIG. 1) at the position of the hole 3a. Is done. The terminal 23 includes a base 23a for attachment to the end cap 3, and a plurality of connection terminals 23c that are fixed to the base 23a through an electrical insulating material 23b such as a glass material or an epoxy resin.

  After the terminal 23 is attached, the external lead wire 25 is connected to the upper end of the connection terminal 23c located in the hole 3a of the end cap 3, and is surrounded by the base 23a of the terminal 23 and the hole 3a of the end cap 3. The recessed portion is filled with a molding material 26, solidified and sealed. The external lead wire 25 is connected to an external power source (not shown). As the molding material 26, for example, a synthetic resin-based or glass or rubber-based electrical insulating material can be used. In the case of the present invention, since the terminal 23 is fixed to the inner surface side of the end cap 3, a recess is formed by the base 23a of the terminal 23 and the hole 3a of the end cap 3 as described above. The material 26 can be filled and solidified. As a result, the mold support material F that has been conventionally used is not necessary, and the manufacturing cost can be reduced.

  An internal lead wire 24 is connected to the lower end of the connection terminal 23c of the terminal 23, and this internal lead wire 24 is connected to the stator 4a of the electric element 4 as shown in FIG. Thereafter, a back plate portion 3d provided along the circumferential direction inside the end cap 3 is fitted into the opening end portion 2c of the container 2, and a flange portion formed on the outer peripheral portion of the end cap 3. The hermetic container 1 is configured by fastening and fixing 3c with the plurality of bolts 1a. The flange portion 3c of the end cap 3 is provided with a plurality of insertion holes for inserting the bolts 1a at intervals, and the opening end portion 2c of the container 2 is screwed to the bolts 1a so as to correspond to these insertion holes. A plurality of screw holes are provided.

  The mold material 26 was solidified by filling the concave portion before the end cap 3 was attached to the open end 2c of the container 2 with the bolt 1a. However, the end cap 3 was bolted to the open end 2c of the container 2 After attaching with 1a, you may make it fill the said recessed part and solidify.

  Since the two-stage rotary compressor configured in this way is lighter than a compressor formed of an iron material when the container 2 and the end cap 3 are formed of an aluminum material, for example, an automobile It becomes suitable for use as a compressor for a refrigeration cycle of an air conditioner.

  Next, the operation of the two-stage rotary compressor according to this embodiment will be described. When the stator 4a of the electric element 4 is energized through the terminal 23, the rotor 4b rotates, and the rotation shaft 6 rotates by the rotation of the rotor 4b to drive the rotary compression element 5. When the rotary compression element 5 is driven, the refrigerant gas is drawn into the suction port 14d of the first support member 14 through the refrigerant gas introduction pipe connected to the suction side sleeve 19 and the suction communication pipe 21.

  The refrigerant gas sucked into the suction port 14 d of the first support member 14 is sucked into the low pressure chamber of the first cylinder 10 through the passage 10 a of the first cylinder 10 in the first rotary compression unit 7. In the first cylinder 10, the first roller 11 fitted to the first eccentric portion 6 a of the rotating shaft 6 rotates eccentrically and compresses the refrigerant gas. The compressed refrigerant gas is discharged from the high pressure chamber of the first cylinder 10 to the silencer chamber 14b of the first support member 14, and after being silenced here, is discharged from the discharge port 14c to a lower region inside the container. The discharged compressed refrigerant gas is discharged to the upper region inside the container through the discharge passage 16c of the main frame 16.

  The refrigerant gas discharged to the upper region inside the container is at an intermediate pressure, and a part of this refrigerant gas passes through a slight gap between the stator 4a and the rotor 4b of the electric element 4 and the upper end portion in the container 2 To the base 23a of the terminal 23. Thereby, since the base 23a receives a force in a direction in which the base 23a is pressed against the end cap 3, the mounting strength of the base 23a is increased. As described above, since the attachment strength of the terminal 23 is increased by the refrigerant gas at the intermediate pressure, the number of the bolts 3b fixing the base 23a can be reduced as compared with the conventional case. Incidentally, when the conventional terminal was attached to the outside of the end cap, seven M4 size bolts were required. However, when the terminal 23 was attached to the inside of the end cap 3 as in the present invention, the M4 size was used. The three bolts 3a are sufficient. As a result, the number of bolts 3a is reduced to half or less, and the bolt insertion holes 23d provided in the base 23a and the screw screw holes 3e provided in the end cap 3 are reduced as shown in FIG. Processing and alignment are facilitated, and workability can be improved and costs can be reduced. As shown in FIG. 1, it is preferable to place a sealing material 27 such as an O-ring on the joint surface between the back plate 3d of the end cap 3 and the open end 2c of the container 2.

  The intermediate-pressure refrigerant gas compressed by the first rotary compression unit 7 and discharged to the upper region inside the container is sucked into the suction port 15d of the second support member 15 from the suction passage 16b of the main frame 16. . The intermediate-pressure refrigerant gas sucked into the suction port 15 d of the second support member 15 is sucked into the low pressure chamber of the second cylinder 12 through the passage 12 a of the second cylinder 12 in the second rotary compression unit 8. Is done. In the second cylinder 12, the second roller 13 fitted to the second eccentric portion 6b of the rotating shaft 6 rotates eccentrically and compresses the refrigerant gas. The compressed refrigerant gas is discharged from the high-pressure chamber of the second cylinder 12 to the silencer chamber 15b of the second support member 15, and after being silenced, is discharged from the discharge port 15c and is connected to the discharge communication pipe 22. Then, the refrigerant gas is discharged to the outside of the container by a refrigerant gas outlet tube connected to the discharge-side sleeve 20. The refrigerant gas discharged to the outside of the container is compressed by the second rotary compression unit 8 and has a high pressure. This high-pressure refrigerant gas is used, for example, as a refrigerant gas for a refrigeration cycle of an automobile air conditioner, and after going through the refrigeration cycle, becomes a low-pressure refrigerant gas and is returned from the suction sleeve 19 to the compressor.

  FIG. 4 shows another embodiment in which the present invention is applied to an internal intermediate pressure type two-stage rotary compressor, and the same components as those in the above embodiment will be described with the same reference numerals. In FIG. 4, reference numeral 1 denotes an airtight container, a container 2 formed in a substantially cylindrical shape, and a substantially disk-shaped or substantially bowl-shaped end cap 3 fixed to the opening end 2 c of the container 2 by welding W; An electric element 4 and a rotary compression element 5 driven by the electric element 4 are accommodated in the container 2. When the container 2 and the end cap 3 are formed of an aluminum material, for example, an aluminum alloy containing Si, Mg, and Cu can be used.

  The end cap 3 is provided with a mounting hole 3a at the center, and a terminal 23 is fastened and fixed inside the end cap 3 by a plurality of bolts 3b at the position of the hole 3a. The terminal 23 includes a base 23a for attachment to the end cap 3, and a plurality of connection terminals 23c that are fixed to the base 23a through an electrical insulating material 23b such as a glass material or an epoxy resin.

  After the terminal 23 is attached, the external lead wire 25 is connected to the upper end of the connection terminal 23c located in the hole 3a of the end cap 3, and is surrounded by the base 23a of the terminal 23 and the hole 3a of the end cap 3. The recessed portion is filled with a molding material 26, solidified and sealed. The external lead wire 25 is connected to an external power source (not shown). As the molding material 26, for example, a synthetic resin type or glass or rubber type electric insulating material can be used. In the case of the present invention, since the terminal 23 is fixed to the inner surface side of the end cap 3, a recess is formed by the base 23a of the terminal 23 and the hole 3a of the end cap 3, and the molding material 26 is filled using this recess. It can be solidified. As a result, the mold support material F that has been conventionally used is not necessary, and the manufacturing cost can be reduced.

  An internal lead wire 24 is connected to the lower end portion of the connection terminal 23 c of the terminal 23, and the internal lead wire 24 is connected to the stator 4 a of the electric element 4. Thereafter, a back plate portion 3d provided along the circumferential direction inside the end cap 3 is press-fitted into the open end portion 2c of the container 2, and the container 2 and the end cap 3 are welded W as described above. By doing so, the sealed container 1 is configured.

  As the welding W, arc welding is generally used, and arc welding is performed along a groove provided on an outer peripheral surface of a butt portion between the container 2 and the end cap 3. Specifically, it can be performed by MIG welding or TIG welding. Since the container 2 and the end cap 3 are welded W, the opening end 2c of the container 2 may be thinner than when the bolt 2 is fixed with a bolt (the embodiment described above).

  The electric element 4 includes a stator 4a fixed to the inner wall surface of the container 2 and a rotor 4b disposed at a slight interval in the center of the stator 4a. The center of the rotor 4b is a rotating shaft. 6 and the lower part of the rotating shaft 6 extends vertically downward.

  The rotary compression element 5 includes a first rotary compression unit 7 and a second rotary compression unit 8 disposed thereon via a partition plate 9. The first rotary compression unit 7 is a first rotary compression unit 7. 1 cylinder 10, and a first roller 11 that is fitted in a first eccentric portion 6 a provided on the rotary shaft 6 and rotates eccentrically inside the first cylinder 10. The rotary compression unit 8 includes a second cylinder 12 and a second roller 13 that is fitted into a second eccentric portion 6 b provided on the rotary shaft 6 and rotates eccentrically inside the second cylinder 12. ing. Further, a vane (not shown) urged by a spring is always in contact with the first roller 11 so that the interior of the first cylinder 10 is divided into a low pressure chamber and a high pressure chamber. The second roller 12 is partitioned into a low-pressure chamber and a high-pressure chamber by a vane (not shown) biased by a spring constantly contacting the second roller 13. The first eccentric portion 6a and the second eccentric portion 6b provided on the rotating shaft 6 are shifted in phase by 180 °.

  In addition, a first support member 14 is disposed below the first rotary compression unit 7, and a second support member 15 is disposed above the second rotary compression unit 8. The first support member 14 and the second support member 15 are configured such that the first rotary compression portion 7, the partition plate 9, and the second rotary compression portion 8 are sandwiched between the inner wall surface of the container 2. The main frame 16 is fixed integrally to the main frame 16 by tightening with a plurality of bolts 16a.

  The first support member 14 has a bearing portion 14a at the center, and a bush is fitted inside the bearing portion 14a to support the lower end portion of the rotary shaft 6. Further, a silencing chamber 14b is provided on the lower surface side of the first support member 14 along the outer periphery of the bearing portion 14a. The silencing chamber 14b communicates with the outlet of the high-pressure chamber in the first cylinder 10. The discharge port 14c provided in the first support member 14 communicates with the discharge port 14c. The silencing chamber 14b is covered with an opening surface by a cover plate 17 fixed to the lower surface of the first support member 14 with bolts 17a, and a hole 17b is provided in the center of the cover plate 17 corresponding to the bearing portion 14a. Yes. Further, the first support member 14 is provided with a suction port 14d, and this suction port 14d communicates with an inlet of a low pressure chamber in the first cylinder 10 through a passage 10a provided in the first cylinder 10. doing. The rotary shaft 6 is provided with a shaft hole 6c, the lower end portion of which is expanded in diameter, and a lubricating oil pumping member 18 is mounted therein.

  The second support member 15 has a bearing portion 15a at the center, and this bearing portion 15a projects upward through the center hole of the main frame 16, and a bush is fitted inside the bearing portion 15a. The rotary shaft 6 is supported. Further, a silencing chamber 15b is provided on the upper surface side of the second support member 15 along the outer periphery of the bearing portion 15a. The silencing chamber 15b communicates with the outlet of the high pressure chamber in the second cylinder 12. The discharge port 15c provided in the second support member 15 communicates with the discharge port 15c. Further, the second support member 15 is provided with a suction port 15d, and the upper end of the suction port 15d communicates with the inside of the container 2 via a suction passage 16b provided in the main frame 16. The lower end of the suction port 15 d communicates with the inlet of the low pressure chamber in the second cylinder 12 through a passage 12 a provided in the second cylinder 12. The main frame 16 is provided with a discharge passage 16c. The discharge passage 16c communicates a region below the main frame 16 and a region above the main frame 16 inside the container.

  The container 2 is provided with a suction side hole 2a in a side wall portion facing the suction port 14d of the first support member 14, and a sleeve 19 is fixed to the position of the suction side hole 2a by a bolt 19a. A discharge-side hole 2b is provided in a side wall portion of the support member 15 facing the discharge port 15c, and a sleeve 20 is fixed to the position of the discharge-side hole 2b by a bolt 20a.

  The suction side sleeve 19 is connected to the inner end portion of the hole 19b and the inlet end portion of the suction port 14d by a suction communication pipe 21, and is connected to the suction communication pipe 21 on the sleeve 19 side for airtightness. An O-ring is fitted to the connection portion, and a collar is fitted to the connection portion with the suction communication pipe 21 on the suction port 14d side. A refrigerant gas introduction pipe (not shown) is connected to the suction side sleeve 19.

  The discharge-side sleeve 20 has an inner end portion of the hole 20b and an outlet end portion of the discharge port 15c connected to each other by a discharge communication tube 22, and the sleeve 20 side is connected to the discharge communication tube 22 to maintain airtightness. An O-ring is fitted to the connection portion, and a collar is fitted to the connection portion with the discharge communication pipe 22 on the discharge port 15c side. A refrigerant gas outlet pipe (not shown) is connected to the discharge-side sleeve 20.

  Next, the operation of the two-stage rotary compressor according to this embodiment will be described. When the stator 4a of the electric element 4 is energized through the terminal 23, the rotor 4b rotates, and the rotation shaft 6 rotates by the rotation of the rotor 4b to drive the rotary compression element 5. When the rotary compression element 5 is driven, the refrigerant gas is drawn into the suction port 14d of the first support member 14 through the refrigerant gas introduction pipe connected to the suction side sleeve 19 and the suction communication pipe 21.

  The refrigerant gas sucked into the suction port 14 d of the first support member 14 is sucked into the low pressure chamber of the first cylinder 10 through the passage 10 a of the first cylinder 10 in the first rotary compression unit 7. In the first cylinder 10, the first roller 11 fitted to the first eccentric portion 6 a of the rotating shaft 6 rotates eccentrically and compresses the refrigerant gas. The compressed refrigerant gas is discharged from the high pressure chamber of the first cylinder 10 to the silencer chamber 14b of the first support member 14, and after being silenced here, is discharged from the discharge port 14c to a lower region inside the container. The discharged compressed refrigerant gas is discharged to the upper region inside the container through the discharge passage 16c of the main frame 16.

  The refrigerant gas discharged to the upper region inside the container is at an intermediate pressure, and a part of this refrigerant gas passes through a slight gap between the stator 4a and the rotor 4b of the electric element 4 and the upper end portion in the container 2 To the base 23a of the terminal 23. Thereby, since the base 23a receives a force in a direction in which the base 23a is pressed against the end cap 3, the mounting strength of the base 23a is increased. As described above, since the attachment strength of the terminal 23 is increased by the refrigerant gas at the intermediate pressure, the number of the bolts 3b fixing the base 23a can be reduced as compared with the conventional case. This reduces the bolt insertion holes 23d provided in the base 23a and the bolt screwing holes 3e provided in the end cap 3, so that these holes can be easily processed and aligned, improving workability and reducing costs. Can be achieved.

  The intermediate-pressure refrigerant gas compressed by the first rotary compression unit 7 and discharged to the upper region inside the container is sucked into the suction port 15d of the second support member 15 from the suction passage 16b of the main frame 16. . The intermediate-pressure refrigerant gas sucked into the suction port 15 d of the second support member 15 is sucked into the low pressure chamber of the second cylinder 12 through the passage 12 a of the second cylinder 12 in the second rotary compression unit 8. Is done. In the second cylinder 12, the second roller 13 fitted to the second eccentric portion 6b of the rotating shaft 6 rotates eccentrically and compresses the refrigerant gas. The compressed refrigerant gas is discharged from the high-pressure chamber of the second cylinder 12 to the silencer chamber 15b of the second support member 15, and after being silenced, is discharged from the discharge port 15c and is connected to the discharge communication pipe 22. Then, the refrigerant gas is discharged to the outside of the container by a refrigerant gas outlet tube connected to the discharge-side sleeve 20. The refrigerant gas discharged to the outside of the container is compressed by the second rotary compression unit 8 and has a high pressure. This high-pressure refrigerant gas is used, for example, as a refrigerant gas for a refrigeration cycle of an automobile air conditioner, and after going through the refrigeration cycle, becomes a low-pressure refrigerant gas and is returned from the suction sleeve 19 to the compressor.

  The present invention can be applied to a compressor in which a terminal is bolted to an end cap. Further, the present invention is not only applied to an internal intermediate pressure type two-stage rotary compressor, but also applied to a multistage rotary compressor having three or more stages, an internal high-pressure type single-stage rotary compressor, and other various types of compressors. Is possible. Furthermore, the compressor according to the present invention can be used not only for automobile air conditioners but also for home air conditioners, commercial air conditioners, other refrigerators, freezers, vending machines, and the like.

1 is a schematic longitudinal sectional view showing an embodiment in which the present invention is applied to an internal intermediate pressure type two-stage rotary compressor. FIG. 2 is a schematic exploded cross-sectional view of an end cap and a terminal in the two-stage rotary compressor of FIG. 1. It is a schematic sectional drawing which shows the attachment structure of the terminal in a prior art example. FIG. 6 is a schematic longitudinal sectional view showing another embodiment in which the present invention is applied to an internal intermediate pressure type two-stage rotary compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Airtight container 2 Container 3 End cap 3a Hole 3b Bolt 3e Screw hole 4 Electric element 5 Rotation compression element 6 Rotating shaft 7 1st rotation compression part 8 2nd rotation compression part 9 Partition plate 14 1st support member 15 1st 2 support members 16 main frame 23 terminal 23a base 23c connection terminal 23d hole 24 internal lead wire 25 external lead wire 26 molding material

Claims (2)

  A compressor in which a hole is provided in an end cap of a hermetic container and a terminal is attached to the hole. The terminal is fixed inside the end cap, and a molding material is filled in a recess surrounded by the terminal and the hole. A compressor characterized by sealing.   The terminal includes a base and a plurality of connection terminals arranged through the base, and the base is fixed to the inside of the end cap via a bolt, and the connection is located in the hole. 2. The compressor according to claim 1, wherein after the external lead wire is connected to the terminal for use, the concave portion is filled with a molding material and sealed.

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