JP4991664B2 - Electric compressor - Google Patents

Description

  The present invention relates to an electric compressor.

  Generally, an electric compressor includes a terminal body disposed in a through-hole formed in a sealed container of the electric compressor, a conductive member (terminal pin) that electrically connects the electric motor and the inverter, and a conductive material. There is provided an airtight terminal (hermetic terminal) made of an insulating member (glass insulator) for insulating and fixing the member to the terminal body. In the sealed container, the cluster block is connected to the conductive member of the hermetic terminal, and the terminal connection portion between the conductive member and the connection terminal to which the wiring on the electric motor side is connected is covered by the housing of the cluster block. (For example, refer to Patent Document 1).

  When the operation of the electric compressor is stopped, the refrigerant gas remaining in the compressor may be cooled, and liquefied refrigerant (liquid refrigerant) may accumulate in the compressor. In this case, when the liquid refrigerant enters the housing of the cluster block and the conductive member located inside the sealed container is immersed in the liquid refrigerant, the conductive member and the sealed container are electrically connected via the liquid refrigerant. It becomes impossible to insulate the sealed container. If the electric compressor is started to operate in this state, the current supplied to the conductive member may leak into the sealed container via the liquid refrigerant.

Therefore, in the electric compressor of Patent Document 2, the conductive member positioned inside the sealed container is covered with the insulating resin including the insulating member, so that the insulating property is maintained even when the conductive member is immersed in the liquid refrigerant. The insulation distance from the sealed container is extended by resin to increase the insulation resistance between the conductive member and the sealed container.
JP 2005-307798 A JP 2001-182655 A

  Moreover, in patent document 1 and patent document 2, between the inside of the housing surrounding an electrically-conductive member or the inside of an insulating resin, and the inside of an airtight container is sealed, and an electrically-conductive member is not immersed in a liquid refrigerant. By doing so, conduction between the conductive member, the conductive part of the wiring and the terminal connection part, and the sealed container through the liquid refrigerant is prevented, and the conductive member, the conductive part of the wiring, the terminal connection part, and the sealed container It is considered to increase the insulation resistance. However, by sealing between the inside of the housing surrounding the conductive member or between the inside of the insulating resin and the inside of the sealed container, the inside of the housing surrounding the conductive member or the inside of the insulating resin is sealed. Therefore, when the liquid refrigerant accumulates in the sealed container, there is a difference between the pressure in the housing or the insulating resin surrounding the conductive member and the pressure in the sealed container. There is a possibility that the resin cannot withstand the pressure difference. Therefore, by forming a through hole in the housing or the insulating resin surrounding the conductive member to form a through hole in the housing or the insulating resin surrounding the conductive member, the pressure in the housing or the insulating resin is increased. It is conceivable to equalize the pressure in the sealed container. However, the current supplied to the conductive member leaks from the through hole to the sealed container through the liquid refrigerant that has entered the housing or the insulating resin, and the conductive member, the conductive portion of the wiring, and the terminal connection portion, There is a risk that insulation with the sealed container cannot be achieved.

  An object of the present invention is to provide an electric compressor capable of increasing insulation resistance between a conductive member, a conductive part of a wiring, a terminal connection part, and a sealed container while equalizing the pressure in the housing and the sealed container. There is to do.

  In order to achieve the above object, the invention according to claim 1 is a compression unit that compresses and discharges a refrigerant, an electric motor that drives the compression unit, and a metal material that houses the compression unit and the electric motor. An airtight container, an inverter for driving the electric motor, a conductive member for electrically connecting the electric motor and the inverter, and a terminal body disposed in a through hole formed in the airtight container An insulating member that insulates and fixes the conductive member to the terminal body, a connection terminal connected to the conductive member, and a wiring for electrically connecting the connection terminal and the electric motor; An electric compressor having an insulating housing for accommodating a terminal connection portion between the conductive member and the connection terminal, wherein an insertion hole into which the conductive member can be inserted is formed in the housing In addition, an insertion hole through which the wiring is drawn is formed, a seal member is disposed between the insertion hole and the wiring, and the outer wall surface of the housing in which the insertion hole is formed and the insulation A sealing property between the insertion hole and the conductive member is ensured while insulating between the sealed container and the conductive member between the member and the housing. And an insulating distance extending passage for extending an insulating distance between the conductive member, the conductive portion of the wiring and the terminal connection portion, and the sealed container. The gist.

  According to this invention, the sealing performance between the insertion hole and the conductive member is ensured, and the sealing performance between the insertion hole and the wiring is secured by the sealing member, so that the inside of the housing and the sealed container The space is sealed, and the liquid refrigerant can be prevented from entering the housing from a portion other than the insulating distance extension passage. Therefore, the conductive member, the conductive portion of the wiring and the terminal connection portion, and the sealed container can be prevented from conducting via the liquid refrigerant flowing from the inside of the housing to the outside of the housing without passing through the insulating distance extension passage, the conductive member, It is possible to insulate the conductive portion and the terminal connection portion of the wiring from the sealed container. In addition, the sealing property between the insertion hole and the conductive member is ensured, and the sealing member ensures the sealing property between the insertion hole and the wiring. The internal pressure is guided into the housing through the insulation distance extending passage, and the pressure in the housing and the sealed container can be equalized. Further, the conductive member, the conductive portion of the wiring, the terminal connection portion, and the sealed container are electrically connected via the liquid refrigerant staying in the insulation distance extension passage. For this reason, for example, the present invention is compared with the case where the conductive member in the housing, the conductive portion of the wiring, the terminal connection portion, and the sealed container are electrically connected through the through-hole formed through the wall of the housing. Then, the conduction distance through the liquid refrigerant can be increased by the length of the insulation distance extension passage. Accordingly, the insulation resistance between the conductive member, the conductive portion of the wiring, the terminal connection portion, and the sealed container can be increased while equalizing the pressure in the housing and the sealed container. Here, the “conductive portion of the wiring” means a portion of the wiring that can be electrically connected to the connection terminal in order to electrically connect the wiring and the conductive member via the connection terminal. For example, when a lead wire is used as the wiring, it means a portion where the insulating film is not formed on the lead wire.

  According to a second aspect of the present invention, in the first aspect of the present invention, the housing is assembled to the first housing component that supports the connection terminal, the first housing component, and the insertion hole. And a third housing component assembled to the first housing component, and the first housing component and the third housing component. A passage forming groove is recessed in at least one of the first and second passage forming grooves. One end of the passage forming groove is directed to the outside of at least one of the first housing structure and the third housing structure. The other end communicates with the first housing component through a through hole formed in the first housing component, and extends the insulation distance. Passage, and subject matter that it is formed by the passage forming grooves covered by assembling said third housing member and the first housing component.

According to the present invention, the insulation distance extension passage can be formed only by assembling the two housing components.
According to a third aspect of the present invention, in the first aspect of the present invention, the housing is assembled to the first housing component that supports the connection terminal, the first housing component, and the insertion. A second housing structure having a hole formed therein, and is open toward at least one of the first housing structure and the second housing structure toward the outside of the housing structure. And a passage forming recess extending into the housing structure is formed in the other housing structure, and a covering portion is formed on the other housing structure to cover the passage forming recess. The gist is that the concave portion is formed by being covered with the covering portion.

According to the present invention, it is possible to form the insulation distance extension passage while forming the housing only by assembling the two housing components.
According to a fourth aspect of the present invention, in the third aspect of the present invention, the insulating distance extension passage is outside the connection terminal in the housing and along a peripheral edge in the housing. The gist is that it is formed to extend.

  According to the present invention, for example, the insulation distance extension passage can be provided longer than the case where the insulation distance extension passage is formed to linearly penetrate the center of the housing, and the conductive member in the housing can be provided. In addition, the insulation resistance between the conductive part and the terminal connection part of the wiring and the sealed container can be further increased.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, wherein the second housing component is made of a rubber material, and the second housing component is The gist is that a fitting recess into which the insulating member can be fitted is formed so as to surround the insertion hole.

  According to this invention, since the second housing component is made of a rubber material, the insulating member is fitted into the fitting recess, and the second housing component and the insulating member are brought into close contact with each other, The sealing property between the conductive members can be ensured. Therefore, it is not necessary to separately provide a seal member for sealing between the insertion hole and the conductive member in the second housing component.

  According to the present invention, it is possible to increase the insulation resistance between the conductive container, the conductive part of the wiring, the terminal connection part, and the sealed container while equalizing the pressure in the housing and the sealed container.

(First embodiment)
Hereinafter, a first embodiment in which the electric compressor of the present invention is embodied will be described with reference to FIGS.

  As shown in FIG. 1A, the sealed container 11 of the electric compressor 10 is made of a metal material and includes a motor housing 12 and a discharge housing 13. A discharge chamber 15 is defined. A discharge port 16 is formed on the end wall of the discharge housing 13. The discharge port 16 is connected to an external refrigerant circuit (not shown). A suction port 17 is formed on the end wall of the motor housing 12. The suction port 17 is connected to an external refrigerant circuit (not shown). In the motor housing 12, a compression unit 18 for compressing the refrigerant and an electric motor 19 for driving the compression unit 18 are accommodated.

  First, the compression unit 18 will be described. The compression unit 18 includes a fixed scroll 20 fixed in the motor housing 12 and a movable scroll 21 disposed to face the fixed scroll 20. A compression chamber 22 whose volume can be changed is defined between the fixed scroll 20 and the movable scroll 21. A rotating shaft 23 is accommodated in the motor housing 12. The rotating shaft 23 is rotatably supported by the motor housing 12.

  Next, the electric motor 19 will be described. A rotor 24 (rotor) and a stator 25 (stator) are provided in the motor housing 12. In the motor housing 12, the rotor 24 is fixed to the outer periphery of the rotary shaft 23 so as to rotate integrally with the rotary shaft 23. The rotor 24 includes a rotor core 241 fixed to the rotary shaft 23 and a plurality of permanent magnets 242 provided on the peripheral surface of the rotor core 241. The stator 25 has a substantially annular shape as a whole. The stator 25 is configured by winding a coil 26 around teeth (not shown) of a stator core 251 fixed to the inner peripheral surface of the motor housing 12.

  On the outer peripheral surface 121 of the motor housing 12, an inverter cover 71 made of aluminum having a box shape with one surface open and having conductivity is fixed. In a state where the inverter cover 71 is fixed to the outer peripheral surface 121 of the motor housing 12, a part of the outer peripheral surface 121 of the motor housing 12 is a bottom surface of the inverter cover 71. Therefore, a space is defined by a part of the outer peripheral surface 121 and the inverter cover 71, and an inverter 70 (shown by a two-dot chain line) for driving the electric motor 19 is accommodated in the space.

  In the electric compressor 10 having the above configuration, the rotating shaft 23 is rotated together with the rotor 24 by supplying electric power from the inverter 70 to the electric motor 19. Then, in the compression unit 18, the volume of the compression chamber 22 between the movable scroll 21 and the fixed scroll 20 is reduced. Then, the refrigerant is sucked into the motor housing 12 from the external refrigerant circuit via the suction port 17. The refrigerant sucked into the motor housing 12 is sucked into the compression chamber 22 via the suction passage 27 and is compressed in the compression chamber 22. The refrigerant compressed in the compression chamber 22 pushes the discharge valve 29 away from the discharge passage 28 formed in the fixed scroll 20 and is discharged into the discharge chamber 15. The refrigerant in the discharge chamber 15 flows out to the external refrigerant circuit via the discharge port 16 and returns to the motor housing 12.

  As shown in FIG. 1B, a through-hole 12 a is formed at a position on the side wall of the motor housing 12 in the sealed container 11 and covered with the inverter cover 71. The through hole 12a has a small-diameter portion 12b near the inside of the sealed container 11 and a large-diameter portion 12c having a diameter larger than that of the small-diameter portion 12b. A step portion 12d is provided between the small diameter portion 12b and the large diameter portion 12c. A metal terminal main body 33 constituting a part of the sealed container 11 is fitted into the through hole 12a, and the terminal main body 33 is supported by the stepped portion 12d, and the through hole 12a is supported by the terminal main body 33. Is closed. Further, the terminal main body 33 is prevented from being detached by a circlip 80 so as not to fall out from the large diameter portion 12c of the through hole 12a. A seal member 34 is provided between the inner peripheral surface of the large diameter portion 12 c and the outer peripheral surface of the terminal main body 33 to make the space between both surfaces airtight. The terminal body 33 is formed with three insertion holes 33a (only one is shown in FIG. 1). A metal terminal 31 as a conductive member is inserted into each insertion hole 33a, and the metal terminal 31 is fixed while being insulated from the terminal body 33 by a glass insulating member 32. One end of the metal terminal 31 is electrically connected to the inverter 70 via the wiring R (see FIG. 1A). The metal terminal 31, the insulating member 32, and the terminal main body 33 constitute an airtight terminal 30.

  The other end of the metal terminal 31 in the hermetic terminal 30 is disposed in the sealed container 11 and connected to the cluster block 37. The cluster block 37 is disposed below the airtight terminal 30 in the sealed container 11. As shown in FIG. 2 or FIG. 3, in the present embodiment, the cluster block 37 includes a housing 40 formed in an elongated square box shape by an insulating material (synthetic resin material).

  As shown in FIG. 2, the housing 40 is assembled to the main body 41 and a main body 41 as a first housing component that houses and supports three connection terminals 36 connected to the other end of each metal terminal 31. And a lid portion 42 as a second housing component having an insertion hole 37a through which the metal terminal 31 can be inserted.

  The main body 41 includes a bottomed box-shaped case 412 that constitutes the outer wall of the main body 41 and has an upper surface (one surface) open, and a terminal housing 411 that is housed in the case 412 and houses the connection terminal 36. It is configured. In the terminal accommodating portion 411 and the case 412, both ends of the housing 40 in the longitudinal direction (the direction of the arrow X shown in FIG. 2) have a three-step shape when viewed from above. An insertion hole 37 b is formed in one end wall of the case 412 in the longitudinal direction of the housing 40. Further, as shown in FIG. 1B, a fitting portion K1 into which the terminal accommodating portion 411 is fitted is formed on the bottom side of the case 412. Further, in the case 412, an enlarged portion K2 that extends outward from the fitting portion K1 is formed on the opening side of the fitting portion K1. The enlarged portion K2 is formed on all inner surfaces except for the side surface on the insertion hole 37b side on the inner surface of the case 412. As shown in FIG. 2, in the case 412, a communication port 412 a is formed on one end surface where the insertion hole 37 b is formed, and the inside and outside of the case 412 are connected to each other through the communication port 412 a. Communicate.

  The terminal accommodating portion 411 has an outer shape that can be fitted to the fitting portion K1. In the terminal accommodating portion 411, an accommodating chamber 411b that individually accommodates the three connection terminals 36 is provided, and the adjacent accommodating chambers 411b communicate with each other through a communication hole 411c. Further, as shown in FIG. 1B, an insertion hole 37c is formed in one end wall of the terminal accommodating portion 411 in the longitudinal direction of the housing 40. In a state where the terminal accommodating portion 411 is fitted to the fitting portion K1 in the case 412, the insertion hole 37c in the terminal accommodating portion 411 and the insertion hole 37b in the case 412 are formed so as to overlap each other. As shown in FIG. 2, the connection terminal 36 is accommodated in each accommodation chamber 411 b of the terminal accommodation portion 411, and the wiring 35 connected to the connection terminal 36 is inserted into the case 412 from the insertion holes 37 b and 37 c. Has been pulled out. The wiring 35 is electrically connected to the electric motor 19. Further, a sealing member 39 is provided in the insertion holes 37 b and 37 c, and the sealing member 39 seals between the insertion holes 37 b and 37 c and the wiring 35.

  In addition, a notch 411 a is formed in a part of the side wall of the terminal accommodating portion 411 so that the inside of the accommodating chamber 411 b of the terminal accommodating portion 411 communicates with the inside of the case 412. The notch 411 a is formed along the depth direction in the terminal accommodating portion 411. In a state where the terminal accommodating portion 411 is fitted to the fitting portion K1, the outer surface of the terminal accommodating portion 411, except for the outer surface on the insertion hole 37c side, is between the inner surface of the enlarged portion K2. The passage forming recess 50 is formed so as to extend along the peripheral edge in the main body 41. One end of the passage forming recess 50 is opened to the outside of the main body 41 by the communication port 412a, and the other end communicates with the inside of the accommodation chamber 411b of the terminal accommodation portion 411 through the notch 411a of the terminal accommodation portion 411. ing. The passage forming recess 50 is recessed from the upper surface of the main body 41.

  Next, the lid part 42 will be described. The lid portion 42 is formed in a plate shape from a rubber material, and both ends in the longitudinal direction of the housing 40 are stepped when viewed from the top, and have substantially the same shape as the case 412 when viewed from the top. The lid portion 42 is formed with three insertion holes 37a through which the other end portions of the respective metal terminals 31 can be inserted. As shown in FIG. 1B, the inner peripheral surface of the insertion hole 37 a is in close contact with the peripheral surface of the metal terminal 31, and the sealing performance between the insertion hole 37 a and the metal terminal 31 is ensured. Furthermore, a fitting recess 42a is formed in the lid portion 42 so as to surround each of the insertion holes 37a. The fitting recess 42a can be fitted with a part of the insulating member 32 (the tip of the insulating member 32 inside the sealed container 11). Then, the insulating member 32 is fitted into the fitting recess 42a, and the insulating member 32 is in close contact with the fitting recess 42a so as to cover the insertion hole 37a, so that the sealing property between the insertion hole 37a and the metal terminal 31 is improved. It is secured. That is, the space between the outer wall surface of the lid portion 42 in which the insertion hole 37a is formed and the insulating member 32 is sealed by fitting the insulating member 32 into the fitting recess 42a. Therefore, the lid portion 42 and the fitting recess 42 a insulate the sealed container 11 from the metal terminal 31 and ensure the sealing property between the insertion hole 37 a and the metal terminal 31.

  As shown in FIG. 2, a fitting convex portion 42 b serving as a covering portion protruding in a direction orthogonal to the lower surface of the lid portion 42 is formed on the peripheral portion of the lid portion 42. Then, as shown in FIGS. 1B and 3, the fitting convex portion 42 b is fitted into the passage forming concave portion 50, thereby covering the passage forming concave portion 50 from above. An insulation distance extending passage 50 a having a height H is formed between the fitting convex portion 42 b and the inner surface of the passage forming concave portion 50. The insulating distance extension passage 50 a is formed outside the connection terminal 36 in the housing 40 and extends along the peripheral edge in the housing 40. One end of the insulation distance extension passage 50a communicates with the inside of the sealed container 11 through the communication port 412a, and the other end communicates with the inside of the storage chamber 411b through the notch 411a. Therefore, the inside of the housing 40 and the inside of the sealed container 11 are communicated with each other by the insulation distance extension passage 50a.

  As shown in FIG. 1B, the other end of the metal terminal 31 is inserted into the housing 40 through the insertion hole 37a with respect to the cluster block 37 having the above-described configuration, and is inserted into the connection hole 36a of the connection terminal 36. It is inserted. The other end of the metal terminal 31 is electrically connected to the connection terminal 36, whereby the inverter 70 and the connection terminal 36 are electrically connected via the metal terminal 31 and connected via the wiring 35. The terminal 36 and the electric motor 19 are electrically connected. Further, the insulating member 32 is fitted into the fitting recess 42a by press-fitting a part of the insulating member 32 into the fitting recess 42a, thereby preventing the metal terminal 31 from exposing a portion inside the sealed container 11. . The housing 40 covers the metal terminal 31 in the housing 40, the conductive portion of the wiring 35, and the terminal connection portion S between the metal terminal 31 and the connection terminal 36. Here, “the conductive portion of the wiring 35” can be electrically connected to the connection terminal 36 in the wiring 35 in order to electrically connect the wiring 35 and the metal terminal 31 via the connection terminal 36. It means that part. For example, when a lead wire is used as the wiring, it means a portion where the insulating film is not formed on the lead wire.

  In the electric compressor 10 configured as described above, when the operation is stopped, the gaseous refrigerant remaining in the sealed container 11 may be cooled, and the liquefied refrigerant may be accumulated in the sealed container 11. At this time, the inner peripheral surface of the lid portion 42 in which the insertion hole 37a is formed is in close contact with the metal terminal 31, and the insulating member 32 is fitted in the fitting recess 42a. 11 and the metal terminal 31 are prevented from conducting, and the sealed container 11 and the metal terminal 31 are insulated. Further, the lid portion 42, the insulating member 32, and the seal member 39 prevent liquid refrigerant from entering the housing 40 from parts other than the insulating distance extension passage 50 a. For this reason, the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S through the liquid refrigerant flowing from the inside of the housing 40 into the sealed container 11 without passing through the insulation distance extension passage 50a, and the sealed container 11 The continuity between is lost. Therefore, the insulation resistance between the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S, and the sealed container 11 is increased. Further, the inside of the housing 40 is hermetically sealed by the lid portion 42, the insulating member 32, and the seal member 39, but the pressure in the sealed container 11 is guided into the housing 40 by the insulating distance extending passage 50 a, and The pressure and the pressure in the sealed container 11 are equalized. Further, since the insulating distance extension passage 50 a is provided so as to extend along the peripheral edge portion in the housing 40, the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S, and the sealed container 11. Is increased by the amount of the liquid refrigerant staying in the insulation distance extension passage 50a. Therefore, the insulation resistance between the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S, and the sealed container 11 is increased.

In the above embodiment, the following effects can be obtained.
(1) The space between the housing 40 and the sealed container 11 is sealed by the fitting of the insulating member 32 to the fitting recess 42 a of the lid portion 42 and the sealing member 39. For this reason, the current supplied from the metal terminal 31 to the terminal connection portion S leaks into the sealed container 11 from the inside of the housing 40 into the sealed container 11 through the liquid refrigerant at a portion other than the insulation distance extension passage 50a. Can be prevented. Further, since the insulation distance extension passage 50a is formed in the housing 40, the insulation distance between the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S, and the sealed container 11 is secured, and the insulation resistance is increased. Can be increased. Further, by providing the insulating distance extension passage 50a so as to communicate the inside of the housing 40 and the inside of the sealed container 11, the inside of the housing 40 and the inside of the sealed container 11 can be equalized. It is possible to prevent the housing 40 from withstanding the pressure difference and being damaged due to the pressure difference from the inside of the container 11.

  (2) The configuration in which the insulation distance extension passage 50 a is outside the connection terminal 36 and extends along the peripheral edge in the housing 40 is, for example, the insulation distance extension passage 50 a at the center in the housing 40. Compared with the structure extended so that it may penetrate linearly, the insulation distance extension channel | path 50a can be provided long. Further, since the insulation distance extending passage 50a is formed outside the portion in which the connection terminal 36 is accommodated in the housing 40, the insulation distance is extended while ensuring a space for accommodating the connection terminal 36 in the housing 40. The passage 50a can be provided long.

  (3) The insulating distance extension passage 50a is formed so as to extend along the peripheral edge in the housing 40, so that the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion through the liquid refrigerant. The conduction path between S and the sealed container 11 becomes longer by the amount of liquid refrigerant staying in the insulation distance extension passage 50a. Therefore, the insulation shortest distance between the metal terminal 31 in the housing 40, the conductive portion of the wiring 35 and the terminal connection portion S, and the sealed container 11 can be extended, and the metal terminal 31 and the wiring 35 in the housing 40 can be extended. It is possible to insulate between the conductive part and the terminal connection part S and the sealed container 11.

  (4) Since the lid portion 42 is made of a rubber material, the insulating member 32 is fitted into the fitting recess 42a, and the lid portion 42 and the insulating member 32 are brought into close contact with each other, so that the insertion hole 37a and the metal terminal 31 are connected. A sealing property between them can be secured. Therefore, it is not necessary to separately provide a sealing member for sealing between the insertion hole 37 a and the metal terminal 31 in the lid portion 42.

(Second Embodiment)
Hereinafter, a second embodiment of the electric compressor according to the present invention will be described with reference to FIGS. In the second embodiment described below, the same components as those in the first embodiment described above are denoted by the same reference numerals, and the redundant description thereof is omitted or simplified.

  As shown in FIG. 5, the cluster block 37 includes a housing 60 formed in an elongated square box shape from an insulating material (synthetic resin material). The housing 60 includes a main body 61 as a first housing component, a lid 62 as a second housing component assembled on the upper surface of the main body 61, and a third housing assembled on the lower surface of the main body 61. It is comprised from the seat part 63 as a structure.

  As shown in FIG. 4, the main body 61 has substantially the same configuration as the terminal accommodating portion 411 of the main body 41 in the first embodiment. In addition, the notch 411a formed in the terminal accommodating part 411 in 1st Embodiment is not formed in the main-body part 61 in this embodiment. As shown in FIG. 4 with a part broken away, a through-hole 61b is formed in the bottom wall 61a of the main body 61 so as to penetrate the bottom wall 61a.

  The lid part 62 has substantially the same shape as the lid part 42 in the first embodiment. In addition, the fitting part 42b formed in the peripheral part of the cover part 42 in 1st Embodiment is not formed in the cover part 62 in this embodiment.

  The seat portion 63 is formed in a plate shape from a rubber material, and both ends of the seat portion 63 (housing 60) in the longitudinal direction (the direction of the arrow X shown in FIG. 4) are stepped when viewed from above. The main body 61 and the lid 62 have substantially the same shape as viewed from above.

  A passage forming groove 65 is recessed in the upper surface 63c (surface on the main body 61 side) of the seat portion 63. The passage forming groove 65 is formed to extend linearly from one end surface 63a in the longitudinal direction of the seat portion 63 toward the other end surface 63b. One end 65a of the passage forming groove 65 opens outward from one end surface 63a of the seat 63, and the other end 65b does not extend to the other end surface 63b. In the housing 60, the passage forming groove 65 is formed so that the other end 65b communicates with the inside of the main body 61 through the through hole 61b. As shown in FIG. 5, by forming the housing 60, the passage forming groove 65 is covered with the bottom wall 61 a of the main body 61, so that the insulating distance extending passage 67 is formed in the housing 60.

  The lid 62 and the main body 61 are coated with an adhesive on the continuous surface of the outer surface of the lid 62 and the outer surface of the main body 61 formed by combining the lid 62 and the main body 61. By being glued. Also, the seat 63 and the main body 61 are coated with an adhesive on the continuous surface of the outer surface of the seat 63 and the outer surface of the main body 61 formed in a state where the seat 63 and the main body 61 are assembled. By being glued.

Therefore, according to the second embodiment, in addition to the effects (1) and (4) of the first embodiment, the following effects can be obtained.
(5) The lid portion 62 and the main body portion 61 and the seat portion 63 and the main body portion 61 are bonded to each other by applying an adhesive to a continuous outer surface formed in a combined state. For this reason, the adhesive is used after the lid 62 and the main body 61 and the seat 63 and the main body 61 are combined. Therefore, after the lid 62 and the main body 61 and the seat 63 and the main body 61 are bonded, the bonded state can be visually recognized. Further, for example, the adhesive does not flow into the storage chamber 411b as in the case of applying the adhesive along the inner peripheral surface of the storage chamber 411b, and the connection terminal 36 is stored in the storage chamber 411b. It can be done smoothly.

  (6) The passage forming groove 65 is formed to extend linearly from one end surface 63a in the longitudinal direction of the seat portion 63 toward the other end surface 63b. Therefore, as compared with the case where the passage forming recess 50 is formed in the peripheral portion of the case 412 as in the first embodiment, it is not necessary to secure a width for forming the passage forming recess 50. The length in the longitudinal direction and the lateral direction can be shortened, and the housing 60 can be made compact.

  (7) In the first embodiment, the passage forming concave portion 50 is formed in the case 412, and the fitting convex portion 42 b is formed in the lid portion 42. For this reason, the molds of the case 412 and the lid 42 are complicated, and the yield may be reduced when molding. However, the seat portion 63 is formed only by recessing the passage forming groove 65 on the upper surface 63c, and the main body portion 61 is formed only by recessing the storage chamber 411b. For this reason, compared with 1st Embodiment, the structure of the metal mold | die for shape | molding the seat part 63 and the main-body part 61 can be simplified, and the seat part 63 and the main-body part 61 can be manufactured cheaply. In addition, the yield can be improved.

In the present embodiment, the following embodiments are also possible.
In each embodiment, the lid portions 42 and 62 are not limited to rubber but may be made of plastic, for example. In this case, a sealing member that secures a sealing property between the insertion hole 37 a and the metal terminal 31 while insulating the sealed container 11 and the metal terminal 31 between the lid portions 42 and 62 and the insulating member 32. It is necessary to provide it separately.

  In the first embodiment, the insulation distance extension passage 50a may be formed so as to pass through other than the peripheral edge in the housing 40. For example, an insulation distance extension passage that meanders in the terminal accommodating portion 411 is formed. May be.

In the first embodiment, two or more communication ports 412a that open to the outside of the housing 40 may be formed, and two or more insulation distance extension passages connected to each communication port 412a may be formed.
In the first embodiment, instead of providing the fitting convex portion 42b on the lid portion 42, the passage forming concave portion that opens toward the outside of the lid portion 42 and extends in the lid portion 42 is provided on the lower surface of the lid portion 42. The insulating distance extending passage may be formed in the housing 40 by overlapping the passage forming recess 50 of the main body portion 41 and the passage forming recess of the lid portion 42. In this case, the passage forming concave portion of the lid portion 42 constitutes a covering portion that covers the passage forming concave portion 50 of the main body portion 41.

  In the first embodiment, instead of providing the fitting convex portion 42b on the lid portion 42, the passage forming concave portion that opens toward the outside of the lid portion 42 and extends in the lid portion 42 is provided on the lower surface of the lid portion 42. Instead of providing the passage forming recess 50 in the main body portion 41, a fitting convex portion as a covering portion that can be fitted to the passage forming recess of the lid portion 42 may be formed. Then, the insulating distance extension passage may be formed in the housing 40 by fitting the passage forming concave portion of the lid portion 42 and the fitting convex portion of the main body portion 41.

  In the second embodiment, an adhesive is applied to the contact surface between the lid portion 62 and the main body portion 61 and the contact surface between the seat portion 63 and the main body portion 61, respectively. The part 63 and the main body part 61 may be bonded to each other.

  In the second embodiment, the passage forming groove 65 formed in the seat portion 63 is illustrated as extending linearly, but the passage forming groove 65 may meander. In this case, a longer insulating distance extending passage 67 can be obtained as compared with the passage forming groove 65 extending linearly.

  In the second embodiment, instead of providing the passage forming groove 65 in the seat portion 63, the passage forming groove may be provided in the lower surface (the surface facing the seat portion 63) of the main body portion 61. Then, the passage forming groove of the main body 61 may be covered with the upper surface 63c of the seat 63, so that the insulating distance extension passage may be formed in the housing 60. In this case, the passage forming groove of the main body 61 communicates with the inside of the main body 61 through the through hole 61b.

  In the second embodiment, a passage forming groove may be provided in a position overlapping the passage forming groove 65 of the seat portion 63 on the lower surface (surface facing the seat portion 63) side of the main body portion 61. Then, the passage forming groove 65 of the seat portion 63 and the passage forming groove of the main body portion 61 may be overlapped, and the insulating distance extending passage may be formed in the housing 60 by covering each other passage forming groove.

  In addition, in the second embodiment, even if the passage forming groove is recessed at a position where it does not overlap with the passage forming groove 65 of the seat portion 63 on the lower surface (surface facing the seat portion 63) side of the main body portion 61. Good. Then, the passage forming groove of the main body 61 may be covered with the upper surface 63c of the seat 63, so that the insulating distance extension passage may be formed in the housing 60. In this case, the bottom wall 61 a of the main body 61 is separately formed with a through hole for communicating the passage forming groove formed in the main body 61 with the inside of the main body 61. That is, the housing 60 may be provided with two insulation distance extension passages.

  In the second embodiment, on the lower surface (surface facing the main body portion 61) side of the lid portion 62, the passage forming groove is formed so as to avoid the insertion hole 37a and the accommodation chamber 411b of the main body portion 61. May be recessed. The passage forming groove of the lid 62 may be covered with the main body 61 so that an insulating distance extension passage is formed in the housing 60.

  (Circle) in each embodiment, the compression part 18 is not limited to the type comprised by the fixed scroll 20 and the movable scroll 21, For example, you may change into a piston type, a vane type, etc.

The following technical idea (invention) can be understood from the embodiment.
(1) The electric compressor according to claim 5, wherein an inner surface of the second housing structure forming the insertion hole is in close contact with the conductive member.

(A) is the longitudinal cross-sectional view which shows the electric compressor of 1st Embodiment, (b) is sectional drawing to which the terminal connection part of a metal terminal and a connection terminal was expanded. The perspective view which shows the main-body part and cover part of 1st Embodiment. The perspective view which shows the state which assembled | attached the main-body part and cover part of 1st Embodiment. The perspective view which shows the main-body part of 2nd Embodiment, a cover part, and a seat part. The perspective view which shows the state which assembled | attached the main-body part, the cover part, and the seat part of 2nd Embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Electric compressor, 11 ... Sealed container, 12a ... Through-hole formed in sealed container, 18 ... Compression part, 19 ... Electric motor, 31 ... Metal terminal as a conductive member, 32 ... Insulating member, 33 ... Terminal main body 35 ... wiring, 36 ... connection terminal, 37a ... insertion hole, 37b, 37c ... insertion hole, 39 ... sealing member, 40, 60 ... housing, 41, 61 ... main body as a first housing component, 42, 62: Lid as second housing component, 42a: fitting recess, 42b: fitting projection as covering, 50 ... passage forming recess, 50a, 67 ... insulation distance extension passage, 61b ... of main body Through hole formed in bottom wall, 63 ... Seat as third housing component, 65 ... Passage forming groove, 65a ... One end of passage forming groove, 65b ... Other end of passage forming groove, 70 ... Inverter, S ... terminal connection.

Claims (5)

A compressor that compresses and discharges the refrigerant;
An electric motor for driving the compression unit;
A sealed container made of a metal material for housing the compression section and the electric motor;
An inverter for driving the electric motor;
A conductive member that electrically connects the electric motor and the inverter;
A terminal body disposed in a through-hole formed in the sealed container;
An insulating member for fixing the conductive member while insulating the terminal body;
A connection terminal connected to the conductive member;
Wiring for electrically connecting the connection terminal and the electric motor;
An electric compressor having an insulating housing for accommodating a terminal connection portion between the conductive member and the connection terminal,
An insertion hole into which the conductive member can be inserted is formed in the housing, and an insertion hole from which the wiring is drawn is formed. A seal member is disposed between the insertion hole and the wiring. And
Between the outer wall surface of the housing in which the insertion hole is formed and the insulating member, there is a sealing property between the insertion hole and the conductive member while insulating between the sealed container and the conductive member. Secured,
Furthermore, the housing communicates the inside of the housing and the sealed container, and also extends the insulation distance between the conductive member, the conductive part of the wiring, the terminal connection part, and the sealed container. An electric compressor characterized in that a distance extension passage is formed. The housing includes a first housing structure that supports the connection terminal, a second housing structure that is assembled to the first housing structure and has the insertion hole formed therein, and the first housing structure. A third housing component assembled to the body,
At least one of the first housing component and the third housing component is provided with a channel forming groove,
One end of the passage forming groove opens toward the outside of at least one of the first housing component and the third housing component, and the other end is formed in the first housing component. Communicating with the first housing component through a through-hole,
2. The electric compressor according to claim 1, wherein the insulating distance extending passage is formed by assembling and covering the passage forming groove with the first housing component and the third housing component. The housing is composed of a first housing component that supports the connection terminal, and a second housing component that is assembled to the first housing component and has the insertion hole formed therein.
At least one of the first housing structure and the second housing structure is provided with a passage forming recess that opens toward the outside of the housing structure and extends into the housing structure. In addition, the other housing component is formed with a covering portion that covers the passage forming recess,
2. The electric compressor according to claim 1, wherein the insulating distance extending passage is formed by covering the passage forming recess with the covering portion.   The electric compressor according to claim 3, wherein the insulating distance extension passage is formed outside the connection terminal in the housing and extends along a peripheral edge in the housing.   The second housing component is made of a rubber material, and a fitting recess into which the insulating member can be fitted is formed in the second housing component so as to surround the insertion hole. The electric compressor as described in any one of Claim 4.

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