JP2012007497A - Electric compressor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric compressor which can be miniaturized by simplifying the structure of a through terminal section.SOLUTION: The through terminal section 16 has such a simple structure that a substantially cylindrical insulating cylinder member 162 made of a rubber material or a polymer alloy material containing rubber is interposed between a substantially columnar through pin member 161 and a substantially cylindrical pressure-fit compression ring 163. The through terminal section 16 is pressure-fitted into a through hole 1d formed in a housing 1. Thereby, the peripheral surface of the pressure-fit compression ring 163 is brought into pressure contact with the inner surface of the through hole 1d formed in the housing 1 over the whole periphery so that a portion between the pressure-fit compression ring 163 and the housing 1 is airtightly sealed, and also the pressure-fit compression ring 163 is reduced in diameter in association with pressure-fitting to compress the insulating cylinder member 162 in a radial direction so that a portion between the through pin member 161 and the pressure-fit compression ring 163 is airtightly sealed while being insulated.

Description

  The present invention has a motor drive circuit such as a compression mechanism that compresses refrigerant, an electric motor that drives the compression mechanism, and an inverter circuit that drives the electric motor, and the electric motor and the motor drive circuit pass through the housing. It is related with the electric compressor connected by.

  2. Description of the Related Art Conventionally, a compression mechanism that sucks and compresses refrigerant, an electric motor that drives the compression mechanism, and a drive circuit unit that drives the motor, the motor is housed in the housing together with the compression mechanism, and the drive circuit unit is installed. There is an electric compressor that is mounted outside a housing and has a motor and a drive circuit unit connected by a penetrating terminal portion that penetrates the housing. And between the terminal main body and the metal terminal, the space between the metal terminal main body serving as a support member when the penetrating terminal portion is mounted on the housing and the metal terminal serving as the conductive path is sealed with glass. An electric compressor that ensures insulation and airtightness is known (for example, see Patent Document 1).

JP 2010-65625 A

  However, in the above-described conventional electric compressor, a sealing member made of an O-ring or the like is disposed between the terminal body and the housing so as to prevent a large stress from being applied to the sealing glass of the penetrating terminal portion and cracking. The terminal body of the penetrating terminal portion attached to the housing is fixed with a circlip or the like to ensure an airtight seal between the housing and the penetrating terminal portion. For this reason, there exists a problem that the structure of a penetration terminal part is complicated and a physique tends to become large.

  In addition, since a material having a linear expansion coefficient similar to that of glass is set as a constituent material of the metal terminal, it is difficult to select a material having a high electric conductivity. Need to be reduced. This is also a factor for increasing the size of the through terminal portion.

  This invention is made | formed in view of the said point, and it aims at providing the electric compressor which can simplify the structure of a penetration terminal part and can reduce a penetration terminal part.

In order to achieve the above object, in the invention described in claim 1,
A compression mechanism for sucking and compressing the refrigerant;
An electric motor that drives the compression mechanism;
A housing that houses the compression mechanism and the motor, and through which the refrigerant sucked by the compression mechanism flows;
A drive circuit unit that is provided outside the housing and drives the motor;
A through terminal portion provided in a through hole formed in the housing and electrically connecting the motor and the drive circuit portion;
The through terminal is
A pin member made of a metal material having one end connected to a lead wire extending from the motor and the other end connected to a drive circuit unit;
A cylindrical insulating member made of a rubber material or a polymer alloy material containing rubber disposed so as to surround the outer periphery of the pin member;
A cylindrical support member made of a metal material disposed so as to surround the outer periphery of the insulating member,
The outer peripheral surface of the support member press-fitted into the through hole is pressed against the housing over the entire circumference,
The support member is deformed inward with the press-fitting to reduce the inner diameter, the insulating member is compressed in the radial direction between the support member and the pin member, and the inner peripheral surface of the support member is insulated over the entire circumference. The inner peripheral surface of the insulating member is in pressure contact with the pin member over the entire circumference.

  According to this, a through-terminal portion having a simple configuration in which a cylindrical insulating member made of a rubber material or a polymer alloy material containing rubber is interposed between the pin member and the cylindrical support member is provided in the through-hole of the housing. By press-fitting into the housing, the outer peripheral surface of the support member is pressed against the housing over the entire circumference to hermetically seal between the support member and the housing. Compressed in the direction, hermetically sealed while insulating between the support member and the pin member. Thus, the through terminal portion can be reduced in size by the through terminal portion having a relatively simple structure.

  In the invention described in claim 2, the pin member is made of a copper material or a copper alloy material. The support member and the pin member are hermetically sealed while being insulated with an insulating member made of a rubber material or a polymer alloy material containing rubber, and it is not necessary to use a glass material for sealing. It is possible to use a copper material or a copper alloy material having high conductivity.

  In the invention according to claim 3, the support member has an annular protrusion protruding inward on the inner peripheral side, and the annular protrusion presses the insulating member inward. It is characterized by. According to this, it is possible to generate a relatively high surface pressure between the annular projecting portion of the support member and the insulating member in an annular shape, and to ensure an airtight seal between the support member and the insulating member.

  According to a fourth aspect of the present invention, the pin member has an annular concave portion or an annular convex portion formed annularly on the outer peripheral surface. According to this, a relatively high surface pressure is generated annularly between the edge of the annular recess of the pin member and the insulating member, or between the annular protrusion of the pin member and the insulating member, An airtight seal between the insulating member and the insulating member can be ensured.

  In the invention according to claim 5, the pin member has an insertion recess that is recessed in the axial direction from one end and into which the lead wire is inserted, and the lead wire inserted in the insertion recess is a pin. It is characterized by being caulked and fixed to the member. According to this, since the lead wire from the motor can be fixed inside the outer peripheral surface of the pin member at one end portion of the pin member, the penetrating terminal portion can be further reduced in size.

It is a front view which shows the external shape of the electric compressor in one Embodiment to which this invention is applied. It is the sectional view on the AA line in FIG. It is sectional drawing which shows the internal structure of an electric compressor. It is sectional drawing which shows schematic structure of the arrangement | positioning site | part of the inverter circuit 20 which is a drive circuit part. 3 is an enlarged cross-sectional view of a part of the inverter circuit 20. FIG. 3 is a cross-sectional view illustrating a schematic structure of a through terminal portion 16. FIG. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1. 7 is a part of a cross-sectional view for each process illustrating a method for manufacturing the through terminal portion 16 and a method for mounting the through terminal portion 16 on the housing 1.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. In the case where only a part of the configuration is described in each embodiment, the other parts of the configuration are the same as those described previously. In addition to the combination of parts specifically described in each embodiment, the embodiments may be partially combined as long as the combination is not particularly troublesome.

  FIG. 1 is a front view showing an outer shape of an electric compressor in an embodiment to which the present invention is applied. 2 is a cross-sectional view taken along line AA in FIG. 1, and FIG. 3 is a cross-sectional view showing the internal structure of the electric compressor.

  The electric compressor 100 shown in FIG. 1 is arrange | positioned, for example in the engine room of a motor vehicle. The electric compressor 100 constitutes a refrigeration cycle device for a vehicle air conditioner together with a condenser, a decompressor, and an evaporator. The electric compressor 100 includes a housing 1.

  The housing 1 is made of a metal such as an aluminum material or an aluminum alloy material having high heat conductivity, and is formed in a substantially cylindrical shape. The housing 1 is provided with a refrigerant inlet 1a and a refrigerant outlet 1b.

  The refrigerant suction port 1 a is disposed on the one side in the axial direction in the housing 1. The refrigerant from the refrigerant outlet of the evaporator flows into the refrigerant inlet 1a. The refrigerant discharge port 1 b is disposed on the other side in the axial direction in the housing 1. The refrigerant discharge port 1b discharges the refrigerant toward the refrigerant inlet of the condenser.

  Legs 2 are provided on the upper side of the housing 1. Legs 3 and 4 are provided on the lower side of the housing 1. The leg portions 2, 3, 4 are each provided with a through-hole through which the bolt 5 passes. Each bolt 5 fixes the housing 1 to the side wall of the engine while passing through the through holes of the leg portions 2, 3, 4.

  2 and 3, the electric compressor 100 includes a motor unit 10 (corresponding to a motor), an inverter circuit 20 (corresponding to a drive circuit unit), a compression mechanism 30, and an inverter cover 40 (corresponding to a cover member). Etc.

  The motor unit 10 is a three-phase synchronous motor, and includes a rotating shaft 12, a rotor 13, a stator core 14, and a stator coil 15.

  The rotating shaft 12 is disposed in the housing 1. The rotating shaft 12 has an axial direction that coincides with the axial direction of the housing 1. The rotating shaft 12 is rotatably supported by bearings 12a and 12b. The rotating shaft 12 transmits the rotational driving force received from the rotor 13 to the compression mechanism 30. The bearings 12 a and 12 b are supported by the housing 1.

  The rotor 13 is, for example, a permanent magnet embedded in a cylindrical shape, and is fixed to the rotating shaft 12. The rotor 13 rotates together with the rotating shaft 12 based on the rotating magnetic field generated from the stator core 14.

  The stator core 14 is disposed on the outer peripheral side in the radial direction with respect to the rotor 13 (rotating shaft 12) in the housing 1. The stator core 14 is formed in a cylindrical shape whose axial direction coincides with the axial direction of the rotary shaft 12. The stator core 14 forms a gap with the rotor 13. The gap constitutes a refrigerant flow path 17 through which the refrigerant flows in parallel to the axial direction of the rotating shaft 12.

  The stator core 14 is made of a magnetic material and is supported from the inner peripheral surface of the housing 1. The stator coil 15 is wound around the stator core 14. The stator coil 15 generates a rotating magnetic field as will be described later.

  The compression mechanism 30 is disposed on the other side in the axial direction with respect to the motor unit 10. The compression mechanism 30 is a scroll type compressor composed of a fixed scroll and a movable scroll. The compression mechanism 30 turns the movable scroll by a rotational driving force from the rotary shaft 12 of the motor unit 10 to suck, compress, and discharge the refrigerant.

  The inverter circuit 20 is mounted on the mounting surface 1 c of the housing 1. The mounting surface 1c is formed on the outer peripheral portion of the housing 1 (that is, on the outer peripheral side in the radial direction of the rotating shaft 12). In the present embodiment, the mounting surface 1 c is located above the outer peripheral portion of the housing 1.

  The inverter circuit 20 is composed of a semiconductor element or the like, and constitutes a drive circuit that generates a three-phase voltage that drives the motor unit 10. The inverter cover 40 is formed so as to cover the inverter circuit 20. The inverter cover 40 is fastened to the housing 1 with screws (not shown).

  As shown in FIG. 2, the outer peripheral wall of the stator core 14 is provided with recesses 14a, 14b, 14c, and 14d. The recess 14 a is formed so as to be recessed in the radial center of the rotary shaft 12 and to extend in parallel to the stator core 14 in the axial direction. Similarly, the recesses 14 b, 14 c, and 14 d are formed so as to be recessed in the radial center of the rotating shaft 12 and extend in parallel to the stator core 14 in the axial direction.

  The recesses 14a, 14b, 14c, and 14d are arranged so as to be displaced at the same interval in the circumferential direction around the rotation shaft 12. The recess 14a is arranged on the inverter circuit 20 side. The recess 14 a forms a first refrigerant flow path 60 between the inner peripheral surface of the housing 1. The recesses 14b, 14c, and 14d constitute second refrigerant flow paths 61, 62, and 63, respectively, with the inner peripheral surface of the housing 1.

  Here, a heat insulating film 80 is provided on the side of the inverter circuit 20 in the recess 14a (on the inner surface of the recess 14a). FIG. 2 schematically shows a heat insulating film 80 having a predetermined thickness. Actually, the heat insulating film 80 is formed in a thin film shape.

  The heat insulating film 80 is formed so as to cover the bottom portion 140 and the side portions 141a and 141b of the concave portion 14a. That is, the heat insulating film 80 is formed in a substantially U-shape when viewed from the axial direction. The heat insulating film 80 prevents heat transfer between the refrigerant and the stator core 14.

  The heat insulating film 80 is made of a material that is highly resistant to refrigerant and lubricating oil (compressor oil) and can withstand high temperatures and high pressures. For example, bismuth (metal), ceramics (inorganic polymer), polyimide (organic inorganic high Molecule) and the like. As the heat insulating film 80, it is particularly preferable to use polyimide having excellent heat resistance.

  The operation of the electric compressor 100 having the above-described configuration will be briefly described. First, the inverter circuit 20 is turned on, and a three-phase drive current is passed through the stator coil 15 of the motor unit 10. Along with this, a rotating magnetic field is generated from the stator core 14, and thus a rotational force is generated on the rotor 13. Then, the rotor 13 rotates with the rotating shaft 12. Therefore, the compression mechanism 30 turns by the rotational driving force from the rotating shaft 12 and sucks the refrigerant.

  At this time, the suction refrigerant from the evaporator side flows into the refrigerant suction port 1 a side of the housing 1. Then, the sucked refrigerant passes through the refrigerant flow paths 17, 60, 61, 62, 63 and flows to the compression mechanism 30 side. The suction refrigerant is compressed by the compression mechanism 30 and discharged from the refrigerant discharge port 1b to the condenser side.

  On the other hand, the inverter circuit 20 generates heat along with its operation. This heat is transmitted to the refrigerant in the refrigerant flow path 60 through the meat part 1n of the housing 1 (see FIGS. 2 and 3).

  At this time, the stator coil 15 generates heat as the three-phase drive current is applied, but the heat insulation film 80 prevents heat transfer between the refrigerant in the refrigerant flow path 60 and the stator core 14. Therefore, the inverter circuit 20 is cooled by the refrigerant in the refrigerant flow path 60.

  Further, the heat generated from the stator coil 15 is transmitted to the refrigerant in the refrigerant flow paths 17 and 61 to 63 through the stator core 14. Thereby, the stator core 14 and the stator coil 15 can be cooled by the refrigerant in the refrigerant flow paths 17 and 61 to 63.

  Next, based on FIG. 4 and FIG. 5, the structure of the drive circuit part which drives a motor is demonstrated. FIG. 4 is a cross-sectional view showing a schematic configuration of an arrangement portion of the inverter circuit 20 which is a drive circuit unit, and FIG. 5 is a cross-sectional view in which a part of the inverter circuit 20 is enlarged.

  As shown in FIG. 4, the inverter circuit 20 is attached to the attachment surface 1 c of the housing 1 and covered with the inverter cover 40. In other words, the inverter circuit 20 is housed in a casing having the mounting surface 1c of the housing 1 as a bottom surface portion and the inverter cover 40 serving as a side surface portion and a ceiling surface portion. A seal member 41 is disposed between the inverter cover 40 and the housing 1 to block the accommodation space of the inverter circuit 20 from the external space.

  The inverter circuit 20 includes a first substrate 21 and a second substrate 22, and the first substrate 21 and the second substrate 22 are connected by an electrical connection means such as a wire 23. The first substrate 21 is a circuit board with a built-in element that incorporates a power element 214 and the like.

  On the other hand, the second substrate 22 is a non-element built-in circuit board in which no element is built in the insulating base material, and is made of a so-called general-purpose printed circuit board such as a glass epoxy board, and includes an insulating base material surface. Various elements and the like are mounted so that the main body portion of the circuit element is disposed outside. Large components such as a connector 221 having a connection terminal with the outside and a power supply filter are mounted on the second substrate 22.

  The first substrate 21 and the second substrate 22 are both attached to the attachment surface 1c, and are arranged in parallel in the direction in which the attachment surface 1c extends. That is, the first substrate 21 and the second substrate 22 are juxtaposed in the extending surface direction of the outer surface of the housing 1. Between the first substrate 21 and the second substrate 22 and the mounting surface 1 c of the housing 1, an insulating heat radiation sheet 24 (corresponding to an insulating sheet member) is interposed over the entire area. The insulating heat dissipation sheet 24 is made of, for example, a resin material (for example, silicone resin), a rubber material (for example, silicone rubber), an inorganic material (for example, mica), or the like.

  As shown in FIG. 5, the first substrate 21 is disposed on the insulating base material 211 made of a thermoplastic resin, the power element 214 disposed inside the insulating base material 211, and the inside or surface of the insulating base material 211. Wiring part formed on the inside or surface of the insulating base material 211 and electrically connected to the power element 214 and other circuit elements 215, such as other circuit elements 215 (for example, passive elements such as resistors). As a conductive pattern 212 and an interlayer connection via 213.

  In other words, the first substrate 21 has an interlayer connection in which conductor patterns 212 are arranged in multiple layers on the surface and inside of an insulating base material 211 made of a thermoplastic resin, and a part of the conductor patterns 212 of different layers is an interlayer connection portion. The power element 214 is electrically connected between the vias 213 (for example, a conductive paste can be used) and electrically connected to the conductor pattern 212 and the interlayer connection via 213 in the insulating base material 211. It is a multilayer substrate on which electronic parts such as are arranged.

  In addition, the first substrate 21 includes a heat dissipation chip 216 made of, for example, copper, which is a heat transfer member embedded in the insulating base material 211. The heat dissipating chip 216 is embedded in a portion of the insulating base material 211 that is closer to the mounting surface 1c side of the housing 1 than the power element 214 (lower side in FIG. 5). The lower surface of the heat dissipating chip 216 is exposed from the insulating base material 211, and the lower surface of the heat dissipating chip 216 and the lower surface of the insulating base material 211 are in the same plane.

  The insulating base material 211 of the first substrate 21 is configured by, for example, laminating a plurality of thermoplastic resin films (base material films) and bonding (welding) them to each other. In addition, as a thermoplastic resin used for the resin film, for example, polyether ether ketone (PEEK), polyether imide (PEI), a mixture of polyether ether ketone and polyether imide, or a liquid crystal polymer may be employed. Can do.

  The first substrate 21 has a conductive pattern 212 made of, for example, a metal foil as a part of the wiring portion on the surface, and a conductor (for example, a conductive paste) is embedded in a via hole having the conductive pattern 212 as a bottom. Penetration depending on the size of the thermoplastic resin film (base film) having the interlayer connection via 213 as a part of the wiring part, the built-in electronic component such as the power element 214 and the built-in component such as the heat radiation chip 216 A plurality of layers of thermoplastic resin films (base film) having holes are laminated and bonded (welded) to each other.

  The conductor pattern 212 is preferably thicker in a so-called power system (for example, a motor current system) in which a relatively large current flows than in a non-power system (for example, a signal transmission system). When the power-type conductor pattern 212 is arranged in the same layer as the non-power-type conductor pattern 212, for example, a copper metal plate member can be used as the power-type conductor pattern 212. When the non-power conductive pattern 212 is disposed in a different layer, the power conductive pattern 212 can be formed of a metal foil or metal plate member that is thicker than the non-power conductive pattern 212.

  The first substrate 21 can be manufactured as follows. A plurality of thermoplastic resin films as described above are laminated with the power element 214 and the like disposed therein. And it pressurizes from both sides in the lamination direction, heating this laminated body. For example, pressurization is performed for 10 to 20 minutes at a pressure of 1 to 10 MPa under an atmospheric temperature of 250 to 350 ° C. Thus, the 1st board | substrate 21 can be manufactured by thermocompression bonding collectively.

  Although an example in which a plurality of thermoplastic resin films are used as the insulating base material 211 of the first substrate 21 has been described, the insulating base material 211 only needs to contain at least a thermoplastic resin, for example, thermoplastic. A base film containing a resin and a base film containing a thermosetting resin are laminated together (for example, alternately or so that the base films containing a thermosetting resin are not continuously laminated). You may make it employ | adopt. In this example, a base film containing a thermoplastic resin functions as an adhesive layer.

  The thermoplastic resin is preferably disposed around a built-in element such as the power element 214 built in the insulating base material 211. It is preferable to dispose the thermoplastic resin in at least a part of the portion in contact with the built-in element, and it is more preferable to dispose the thermoplastic resin over the entire area (entire surface) surrounding the built-in element. When a thermoplastic resin is disposed in a portion in contact with the built-in element, the built-in elements such as the power element 214 are sealed in the insulating base material 211 when the insulating base material 211 is formed by heating and pressing a plurality of laminated resin films. It is easy to stop (the entire area except the electrical connection portion on the outer surface of the built-in element is in close contact with the insulating base material).

  As is apparent from FIG. 5, the first substrate 21 is formed with a through hole 211 a that penetrates the insulating base material 211 in the thickness direction (vertical direction in the drawing) in the vicinity of the left side end portion in the drawing.

  The heat dissipating chip 216 is disposed so as to include a part or the whole of the projection region of the power element 214 in the thickness direction (the vertical direction in the drawing) of the insulating base material 211, and extends greatly to the left side in the drawing. . The heat radiation chip 216 extends to a region including a portion where the through hole 211a of the insulating base material 211 is formed. A through hole 216 a is formed on the same axis in the heat radiation chip 216 in correspondence with the through hole 211 a of the insulating base material 211.

  In a portion where the mounting surface 1c of the housing 1 is formed, a penetrating pin member 161 of the penetrating terminal portion 16 extending from the stator coil 15 of the motor portion 10 (not shown in FIG. The portion of the penetrating pin member 161 projecting outward from the housing 1 is disposed in the through hole 211a of the insulating base material 211.

  The through pin member 161 is electrically connected to the heat radiation chip 216 of the first substrate 21 by an electrical joining means such as soldering. The heat dissipating chip 216 is electrically connected to the power element 214 by contact with the conductor pattern 212 or the like, and is connected to the through pin member 161 of the heat dissipating chip 216 (the through hole 216a portion of the heat dissipating chip 216). ) Is an output unit that outputs supply power from the first substrate 21 to the motor unit 10.

  The penetrating pin member 161 of the penetrating terminal portion 16 may be electrically connected only to the heat dissipating chip 216, or may be connected to the conductor pattern 212 or the like having the same potential as the heat dissipating chip 216. Absent.

  Here, the configuration of the through terminal portion 16 will be described. FIG. 6 is a cross-sectional view showing a schematic structure of the through terminal portion 16.

  As shown in FIG. 6, the penetrating terminal portion 16 includes a penetrating pin member 161 (corresponding to a pin member), an insulating cylinder member 162 (corresponding to an insulating member), a press-fit compression ring 163 (corresponding to a support member), and an insulating boot. 164 and disposed in the through hole 1 d of the housing 1.

  The penetration pin member 161 is a columnar member made of a metal material such as a copper material or a copper alloy material. The through-pin member 161 is formed with an annular groove 161a (corresponding to an annular recess) recessed from the outer peripheral surface at a substantially central portion in the axial direction (at a portion located in the through-hole 1d). A plurality (four in this example) of the annular grooves 161a are arranged in parallel at intervals in the axial direction.

  At one end portion of the penetrating pin member 161 (the lower end portion in FIG. 6 and the inner end portion of the housing 1), a concave portion 161b (corresponding to an insertion recess portion) having a circular cross section that is recessed in the axial direction from the end portion toward the upper portion in the drawing. ) Is formed. In the recess 161b, the end portion of the lead wire 151 extending from the stator coil 15 is inserted with the insulating film removed, and is fixed by caulking from the outer peripheral side of the penetrating pin member 161. Note that the other end portion of the penetrating pin member 161 (the upper end portion in FIG. 6, the outer end portion of the housing 1) is electrically connected to the first substrate 21 of the inverter circuit 20 as described above.

  A substantially cylindrical insulating cylinder member 162 is disposed on the outer periphery of the penetrating pin member 161 so as to surround the penetrating pin member 161. The insulating cylinder member 162 is made of a rubber material or a polymer alloy material containing rubber (a relatively high toughness cross-linking and hardening material, for example, a material containing silica as a filler in a polymer alloy material of epoxy resin and rubber). The thermal expansion coefficient approximates that of the penetrating pin member 161.

  As is apparent from FIG. 6, the insulating cylindrical member 162 has an inner diameter that is substantially uniform in the axial direction, and the outer diameter gradually decreases from the upper side to the lower side in the drawing. The diameter portion 162b and the small outer diameter portion 162c are integrally formed. The outer peripheral surface of the penetrating pin member 161 described above is in pressure contact with the outer peripheral surface of the insulating cylindrical member 162.

  A portion where the annular groove 161a of the penetrating pin member 161 is formed is inside the large outer diameter portion 162a of the insulating cylindrical member 162, and the insulating cylindrical member 162 is also pushed into the annular groove 161a. The insulating cylinder member 162 is strongly pressed against the penetrating pin member 161 at the corner between the annular groove 161a and the cylindrical outer peripheral surface of the penetrating pin member 161, and a high surface pressure is generated.

  A substantially cylindrical press-fitting compression ring 163 is disposed on the outer periphery of the insulating cylinder member 162 so as to surround the insulating cylinder member 162. The press-fit compression ring 163 is made of a metal material (for example, a copper alloy material such as brass), and has an outer diameter substantially uniform in the axial direction. The press-fitting compression ring 163 is in pressure contact with the outer peripheral surface of the cylindrical portion 163a that is in pressure contact with the outer peripheral surface of the large outer diameter portion 162a of the insulating cylindrical member 162 and the inner peripheral diameter portion 162b of the insulating cylindrical member 162 that has a smaller inner diameter than the cylindrical portion 163a. The small inner diameter portion 163b is integrally formed.

  An annular projecting portion 163c projecting inward is provided on the inner surface near the upper end of the cylindrical portion 163a. The annular projecting portion 163c strongly presses the insulating cylindrical member 162 inward to generate a high surface pressure. In addition, the annular projecting portion 163c securely holds the insulating cylinder member 162 together with the small inner diameter portion 163b projecting inwardly in the downward direction in the figure.

  The press-fit compression ring 163 is press-fitted into the through hole 1 d of the housing 1, and the outer peripheral surface of the press-fit compression ring 163 is in pressure contact with the inner surface of the through hole 1 d of the housing 1 over the entire circumference. The press-fitting compression ring 163 is elastically deformed inward with the press-fitting into the through hole 1d to reduce the inner diameter, and the inner peripheral surface of the press-fitting compression ring 163 extends over the entire outer peripheral surface of the insulating cylindrical member 162. And the inner peripheral surface of the insulating cylinder member 162 presses and presses the outer peripheral surface of the penetrating pin member 161 over the entire circumference.

  An insulating boot 164 made of, for example, a rubber material is disposed so as to cover a portion where the lead wire 151 is caulked and fixed to the penetrating pin member 161 at a portion located inside the housing 1 of the penetrating terminal portion 16. Specifically, the insulating boot 164 covers from the small outer diameter portion 162c of the insulating cylindrical member 162 to the portion where the insulating coating of the lead wire 151 is formed, and the insulating coating of the penetrating pin member 161 and the lead wire 151 is removed. The exposed portion is exposed in the housing 1 to prevent contact with the refrigerant or compressor oil. The insulating cylinder member 162 and the insulating boot 164 are made of a material that is resistant to refrigerant and compressor oil.

  Here, the manufacturing method of the penetration terminal part 16 and the mounting method to the housing 1 are demonstrated using FIGS. 7-12 in addition to FIG.

  First, as shown in FIG. 7, a penetrating pin member 161 is prepared, and an insulating cylinder member 162 is disposed around the penetrating pin member 161 as shown in FIG. At this time, the inner diameter of the insulating cylindrical member 162 before being fitted around the penetrating pin member 161 is formed to be substantially the same or slightly smaller than the outer diameter of the penetrating pin member 161, and the insulating cylindrical member 162 is formed around the penetrating pin member 161. Can be easily disposed, and it is difficult for the penetrating pin member 161 to fall off after the disposing. With this configuration, when the insulating cylinder member 162 is disposed around the penetrating pin member 161, the insulating cylinder member 162 is not pushed into the annular groove 161 a of the penetrating pin member 161.

  When the insulating cylinder member 162 is disposed around the penetrating pin member 161 as shown in FIG. 8, next, the press-fitting compression ring 163 is arranged around the insulating cylinder member 162 as shown in FIG. At this time, the inner diameter of the cylindrical portion 163a of the press-fit compression ring 163 is substantially the same as the outer diameter of the large outer diameter portion 162a of the insulating cylindrical member 162, and the inner diameter of the small inner diameter portion 163b of the press-fit compression ring 163 is insulated. The outer diameter of the intermediate outer diameter portion 162b of the cylindrical member 162 is substantially the same.

  Therefore, when the temporary assembly of the penetrating pin member 161, the insulating cylindrical member 162, and the press-fitting compression ring 163 is held from the outside of the press-fitting compression ring 163 with the upper direction shown in FIG. A step portion between the large outer diameter portion 162a and the middle outer diameter portion 162b of the insulating cylindrical member 162 is locked on the upper surface of the small inner diameter portion 163b of the press-fitting compression ring 163, and can be stably held. The process shown in FIGS. 7 to 9 is a temporary assembly forming process.

  After forming the temporary assembly of the penetrating pin member 161, the insulating cylindrical member 162, and the press-fit compression ring 163, the temporary assembly is placed in the mold 90 as shown in FIG. It presses with the cyclic | annular metal mold | die 91, and the upper part of the press-fit compression ring 163 is plastically deformed. The press-fit compression ring 163 is constrained on the outer peripheral surface and the lower surface by a mold 90, and a part of the meat at the upper part of the press-fit compression ring 163 is deformed inward by the downward movement of the mold 91, thereby causing an annular protrusion. A portion 163c is formed.

  Thereby, the annular protrusion 163c presses the insulating cylinder member 162 inward to generate a high surface pressure, and the insulating cylinder member 162 is elastic as the annular protrusion 163c bites into the insulating cylinder member 162. Deformed, a part of the meat of the insulating cylinder member 162 located between the small inner diameter portion 163b and the annular projecting portion 163c is pushed inward and pushed into the annular groove 161a of the penetrating pin member 161.

  In this way, the upper part of the press-fitting compression ring 163 is deformed inward to form an annular protrusion 163c and the insulating cylindrical member 162 is caulked, so that the inner peripheral surface of the press-fitting compression ring 163 extends over the entire area. The inner peripheral surface of the insulating cylindrical member 162 is in contact with the outer peripheral surface of the penetrating pin member 161 over the entire area. The process shown in FIG. 10 is a temporary assembly caulking process.

  When the penetrating pin member 161, the insulating cylindrical member 162, and the press-fitting compression ring 163 constituting the temporary assembly are caulked and fixed to each other, as shown in FIG. 11, the lead extending from the stator coil 15 into the recess 161b of the penetrating pin member 161. The end of the wire 151 from which the insulating coating is removed is inserted and fixed by caulking. The process shown in FIG. 11 is a motor lead wire connecting process.

  When the lead wire 151 is connected to the end portion of the penetrating pin member 161, an insulating boot 164 is attached so as to cover the connecting portion as shown in FIG. Note that when the caulking process shown in FIG. 11 is performed, the insulating boot 164 is already in the state where the lead wire 151 is inserted. Here, instead of the rubber insulating boot 164, a heat shrinkable tube or the like may be employed as the insulating covering member.

  When the manufacture of the through terminal portion 16 shown in FIG. 12 is completed, the through terminal portion 16 is press-fitted into the through hole 1d of the housing 1 and attached to the housing 1 as shown in FIG. In the through terminal portion 16 before being attached to the housing 1, the outer diameter of the press-fit compression ring 163 is slightly larger than the inner diameter of the through hole 1 d of the housing 1. When the through terminal portion 16 (specifically, the press-fit compression ring 163) is press-fitted into the through-hole 1d from the inside of the housing 1, the press-fit compression ring 163 is elastically deformed so that the outer peripheral surface follows the inner surface of the through-hole 1d. To do.

  Accordingly, the outer peripheral surface of the press-fitting compression ring 163 is pressed against the inner surface of the through hole 1d of the housing 1 over the entire periphery. Further, the press-fitting compression ring 163 is reduced in diameter with the elastic deformation due to press-fitting (the inner diameter is reduced). Due to the reduction in diameter due to the press-fitting of the press-fitting compression ring 163, the insulating cylinder member 162 is radially compressed between the penetrating pin member 161 and the press-fitting compression ring 163, and the inner peripheral surface of the press-fitting compression ring 163 is an insulating cylinder over the entire circumference. The outer peripheral surface of the member 162 is pressed, and the inner peripheral surface of the press-fitting compression ring 163 and the outer peripheral surface of the insulating cylinder member 162 are in a pressure contact state. Further, by the insulating cylindrical member 162 pushed inward by the reduced diameter press-fitting compression ring 163, the inner peripheral surface of the insulating cylindrical member 162 presses the outer peripheral surface of the penetrating pin member 161 over the entire periphery, and the insulating cylindrical member 162 An inner peripheral surface and the outer peripheral surface of the penetration pin member 161 will be in a press-contact state. The process of attaching the through terminal portion 16 shown in FIG. 12 to the housing 1 as shown in FIG. 6 is a press-fit installation process.

  According to the above-described configuration and manufacturing method, a substantially cylindrical insulating cylindrical member made of a rubber material or a polymer alloy material containing rubber between a substantially cylindrical penetrating pin member 161 and a substantially cylindrical press-fitting compression ring 163. The through terminal portion 16 having a simple configuration with the 162 is press-fitted into the through hole 1d of the housing 1 so that the outer peripheral surface of the press-fitting compression ring 163 is pressed against the inner surface of the through hole 1d of the housing 1 over the entire circumference. The press-fitting compression ring 163 and the housing 1 are hermetically sealed, and the press-fitting compression ring 163 is contracted with the press-fitting to compress the insulating cylindrical member 162 in the radial direction, so that the penetrating pin member 161 and the press-fitting compression ring 163 Airtight sealing can be performed while insulating the gap. Therefore, the through terminal portion 16 can be downsized by the through terminal portion 16 having a relatively simple structure.

  Further, an airtight seal is made while insulating between the press-fitting compression ring 163 and the penetrating pin member 161 with an insulating cylinder member 162 made of a rubber material or a polymer alloy material containing rubber, and it is necessary to use a glass material for sealing. Therefore, a copper material or a copper alloy material having high electrical conductivity can be used for the through pin member 161, and the diameter of the through pin member 161 can be reduced.

  Further, the press-fitting compression ring 163 is provided with an annular projecting portion 163c projecting inward to press the insulative cylindrical member 162 inward, and the press-fitting compression ring 163 has an annular projecting portion 163c and the insulating tubular member 162. A relatively high surface pressure is annularly generated between them. Therefore, the space between the press-fitting compression ring 163 and the insulating cylinder member 162 can be reliably hermetically sealed.

  In addition, a plurality of annular grooves 161 a formed in an annular shape are provided on the outer peripheral surface of the penetrating pin member 161, and a relatively high surface pressure is applied between the side corners of each annular groove 161 a of the penetrating pin member 161 and the insulating cylindrical member 162. It is generated in a ring shape. Therefore, the space between the penetrating pin member 161 and the insulating cylinder member 162 can be reliably hermetically sealed.

  A recess 161b extending in the axial direction is formed at one end of the penetrating pin member 161, and the end of the lead wire 151 is inserted into the recess 161b and fixed by caulking. Therefore, since the lead wire 151 from the stator coil 15 can be fixed inside the outer peripheral surface of the penetration pin member 161, the penetration terminal portion 16 can be further reduced in size. Since it is not necessary to use a method of caulking and fixing the connection terminal to the end of the lead wire 151, incorporating it in the cluster block, and connecting to the through pin member 161, the number of parts can be reduced and the process can be simplified. it can.

  Further, the inverter circuit 20 that is a drive circuit unit includes a first substrate 21 in which a power element 214 that controls supply power supplied to the motor unit 10 is incorporated in an insulating base material 211. It is attached to the attachment surface 1 c of the housing 1 and is cooled by the sucked refrigerant flowing through the housing 1. Therefore, it is not necessary to dispose the main body portion of the power element 214 in a layer different from the circuit board and cool it by pressing it against the housing. In this way, the size of the inverter circuit 20 can be reduced while ensuring the cooling performance of the power element 214.

  Further, when the power element main body is disposed in a layer different from the circuit board and pressed against the housing to cool the power element, it is difficult to transfer the heat of the circuit board to the housing. It is possible to dissipate heat from the first substrate 21 and the second substrate 22 to the housing 1 and improve heat dissipation.

  The inverter circuit 20 is configured by electrically connecting a first substrate 21 that is a circuit board with a built-in element and a first substrate 22 that is a circuit board with a non-element built-in. Therefore, the inverter circuit 20 can be configured at a relatively low cost by using a part of the substrate constituting the inverter circuit 20 as a relatively inexpensive non-element built-in circuit board.

  Further, the first substrate 21 and the second substrate 22 are arranged side by side along the mounting surface 1 c of the housing 1. Therefore, even if the substrate of the inverter circuit 20 is composed of the first substrate 21 and the second substrate 22, the height of the inverter circuit 20 from the outer surface of the housing 1 can be suppressed.

(Other embodiments)
The preferred embodiments of the present invention have been described above, but the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  In the said embodiment, although the annular groove 161a was provided in the outer peripheral surface of the penetration pin member 161, it is not limited to this. For example, an annular protrusion may be provided on the outer peripheral surface, or both an annular groove and an annular protrusion may be provided.

  Moreover, in the said embodiment, although the penetration pin member 161 was formed with the copper material or the copper alloy material, it is not limited to this, For example, it can also form with an aluminum material or an aluminum alloy material.

  Moreover, in the said embodiment, the penetration pin member 161 of the penetration terminal part 16 was arrange | positioned in the penetration hole 211a of the 1st board | substrate 21, and was connected to the penetration hole 216a of the chip | tip 216 for thermal radiation which is an output part. However, the present invention is not limited to this. For example, a through-pin member 161 may be disposed along the end surface of the insulating base material 211 without providing a through-hole in the first substrate 21 and connected to the output portion of the heat radiation chip 216. According to this, the size of the first substrate 21 can be reduced. At this time, it is preferable that a concave portion having a semicircular cross section is formed in the end portion of the first substrate 21 in accordance with the outer peripheral shape of the penetrating pin member 161 to form an arc-shaped end surface.

  Further, the output portion of the heat radiation chip 216 may be the through-hole 216 a or may be an arcuate end surface corresponding to the end surface of the first substrate 21. Further, for example, an output unit that outputs supply power from the first substrate 21 to the motor unit 10 may be provided in a wiring part such as the conductor pattern 212 without being provided in the heat radiation chip 216.

  Moreover, in the said embodiment, although the inverter circuit 20 which is a drive circuit part was comprised with the two board | substrates of the 1st board | substrate 21 and the 2nd board | substrate 22, it is not limited to this. The inverter circuit 20 may be composed of three or more substrates, or may be composed of one circuit substrate in which the power element 214 is built. Further, the inverter circuit 20 may be composed of only a non-element built-in substrate.

  Moreover, in the said embodiment, the inverter circuit 20 which is a drive circuit part is attached to the side part of the housing 1 substantially parallel to the axial direction (direction where the motor part 10 and the compression mechanism 30 were located in a line) of the motor part 10, The through terminal portion 16 is disposed in the through hole 1d in the side surface portion of the housing 1 (although it is a so-called camel-back type electric compressor), but is not limited thereto. What is necessary is just to be attached to the attachment surface formed in the site | part through which the suction | inhalation refrigerant | coolant distribute | circulates the inside among the outer surfaces of the housing 1. FIG. For example, the inverter circuit 20 is attached to the surface on the side opposite to the compression mechanism in the axial direction of the motor unit 10 (the surface on the right side in FIG. 1), and the through terminal portion 16 is inserted into the through hole provided in the housing 1 correspondingly. It may be provided (a so-called inline type electric compressor may be used).

DESCRIPTION OF SYMBOLS 1 Housing 1d Through-hole 10 Motor part (motor)
16 Through terminal part 20 Inverter circuit (drive circuit part)
30 compression mechanism 151 lead wire 161 penetrating pin member (pin member)
161a Annular groove (annular recess)
161b Recessed portion (inserted recessed portion)
162 Insulating cylinder member (insulating member)
163 Press-fit compression ring (support member)
163c annular protrusion

Claims (5)

A compression mechanism for sucking and compressing the refrigerant;
An electric motor for driving the compression mechanism;
A housing that houses the compression mechanism and the motor, and in which a refrigerant that is sucked in by the compression mechanism flows;
A drive circuit unit provided outside the housing and driving the motor;
A through terminal portion provided in a through hole formed in the housing and electrically connecting the motor and the drive circuit portion;
The through terminal portion is
A pin member made of a metal material having one end connected to a lead wire extending from the motor and the other end connected to a drive circuit unit;
A cylindrical insulating member made of a rubber material or a polymer alloy material containing rubber disposed so as to surround the outer periphery of the pin member;
A cylindrical support member made of a metal material disposed so as to surround the outer periphery of the insulating member,
The outer peripheral surface of the support member press-fitted into the through-hole is pressed against the housing over the entire circumference,
The support member is deformed inward with the press-fitting to reduce the inner diameter, and the insulating member is radially compressed between the support member and the pin member, so that the inner peripheral surface of the support member Is in pressure contact with the insulating member over the entire periphery, and the inner peripheral surface of the insulating member is in pressure contact with the pin member over the entire periphery.   The electric compressor according to claim 1, wherein the pin member is made of a copper material or a copper alloy material. The support member has an annular protrusion that protrudes inward on the inner peripheral side,
The electric compressor according to claim 1, wherein the annular protrusion presses the insulating member inward.   4. The electric compressor according to claim 1, wherein the pin member has an annular concave portion or an annular convex portion formed annularly on an outer peripheral surface. 5. The pin member is recessed in the axial direction from the one end, and has an insertion recess into which the lead wire is inserted,
5. The electric compressor according to claim 1, wherein the lead wire inserted into the insertion recess is caulked and fixed to the pin member. 6.

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