WO2016203845A1 - Compresseur à commande électrique - Google Patents

Compresseur à commande électrique Download PDF

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Publication number
WO2016203845A1
WO2016203845A1 PCT/JP2016/062740 JP2016062740W WO2016203845A1 WO 2016203845 A1 WO2016203845 A1 WO 2016203845A1 JP 2016062740 W JP2016062740 W JP 2016062740W WO 2016203845 A1 WO2016203845 A1 WO 2016203845A1
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WO
WIPO (PCT)
Prior art keywords
refrigerant
partition wall
suction
opening
electric compressor
Prior art date
Application number
PCT/JP2016/062740
Other languages
English (en)
Japanese (ja)
Inventor
潤一郎 寺澤
Original Assignee
カルソニックカンセイ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2016049141A external-priority patent/JP2017008922A/ja
Application filed by カルソニックカンセイ株式会社 filed Critical カルソニックカンセイ株式会社
Publication of WO2016203845A1 publication Critical patent/WO2016203845A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/10—Adaptations or arrangements of distribution members
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/04—Heating; Cooling; Heat insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet

Definitions

  • the present invention relates to a compressor for a refrigeration cycle that compresses refrigerant, and more particularly, to an electric compressor using an electric motor as a power source.
  • the compressor used in the refrigeration cycle sucks low-temperature and low-pressure refrigerant, and discharges the high-temperature and high-pressure refrigerant by compression.
  • compressors there is an electric compressor having an electric motor as a power source of a refrigerant compression mechanism, and the electric compressor is provided with a drive circuit that converts DC power from a power source into AC by an inverter and supplies the AC to the electric motor. .
  • the inverter has power switching elements such as IGBTs (Insulated Gate Bipolar Transistors, insulated gate bipolar transistors) and MOSFETs (Metal Oxide Semiconductors Field Effects Transistors, field effect transistors).
  • IGBTs Insulated Gate Bipolar Transistors, insulated gate bipolar transistors
  • MOSFETs Metal Oxide Semiconductors Field Effects Transistors, field effect transistors
  • the power switching element generates heat due to a loss during switching (switching loss). If the temperature of the power switching element rises above the heat resistance temperature due to this heat generation, the power switching element is damaged. Therefore, the flow path of the low-temperature and low-pressure suction refrigerant and the power switching element are respectively arranged along the surfaces of the walls partitioning the accommodating spaces of the compression mechanism and the drive circuit, and the power-use switching device for power is supplied by the suction refrigerant through the partition wall. Conventionally, cooling of the switching element has been proposed (for example, Patent Document 1).
  • An object of the present invention is to provide an electric compressor capable of more effectively cooling a power switching element with a suction refrigerant.
  • One aspect of the present invention includes a compression mechanism that compresses a refrigerant, an electric motor that drives the compression mechanism, a main body housing that houses the compression mechanism and the electric motor, and a drive circuit for the electric motor.
  • a circuit housing partitioned from the main body housing by a partition wall; a heat-generating component of the drive circuit that is in contact with a contact portion of one surface of the partition wall exposed to the circuit housing; and exposed to the main body housing.
  • FIG. 1 is a front sectional view showing a schematic configuration of the electric compressor according to the first embodiment of the present invention.
  • FIG. 2 is an enlarged vertical cross-sectional view of a main part showing a configuration in the vicinity of the suction refrigerant passage of FIG.
  • FIGS. 3A and 3B show another configuration in the vicinity of the intake refrigerant passage of FIG. 1.
  • FIG. 3A is an enlarged vertical sectional view of a main part
  • FIG. FIG. 4 is a partially cutaway perspective view of the inverter case showing another configuration of the thin wall portion formed on the partition wall in accordance with the opening of the valve case of FIG. 5A and 5B show another configuration in the vicinity of the suction refrigerant passage of FIG. 1, wherein FIG.
  • FIG. 5A is an enlarged vertical sectional view of a main part
  • FIG. 5B is an enlarged sectional view of a portion A of FIG.
  • FIG. 6 is a front sectional view showing a schematic configuration of the electric compressor according to the second embodiment of the present invention.
  • FIG. 7 is an enlarged vertical cross-sectional view of a main part showing a configuration in the vicinity of the suction refrigerant passage of FIG.
  • FIG. 8 is a front sectional view showing a schematic configuration of an electric compressor according to a modification of the second embodiment of the present invention.
  • FIG. 9 is an enlarged vertical cross-sectional view of a main part showing a configuration in the vicinity of the suction refrigerant passage of FIG. FIG.
  • FIG. 10 is a front sectional view showing a schematic configuration of the electric compressor according to the third embodiment of the present invention.
  • 11 shows a refrigerant guide cover constituting the suction refrigerant passage of FIG. 10
  • (a) is a perspective view of the refrigerant guide cover as viewed from the front side
  • (b) is a view of the refrigerant guide cover from the back side.
  • It is a perspective view.
  • 12 is an enlarged vertical cross-sectional view of a main part showing a configuration in the vicinity of the suction refrigerant passage of FIG.
  • FIG. 13 is a front sectional view showing a schematic configuration of an electric compressor according to a modification of the third embodiment of the present invention.
  • FIG. 14 is an enlarged vertical cross-sectional view of a main part showing a configuration in the vicinity of the suction refrigerant passage of FIG.
  • FIG. 15 is a front sectional view showing a schematic configuration of the electric compressor according to the fourth embodiment of the present invention.
  • 16 is an enlarged vertical cross-sectional view of a main part showing the configuration in the vicinity of the suction refrigerant passage of FIG.
  • FIG. 17 shows an inverter case in which an intake refrigerant passage of an electric compressor according to a modification of the fourth embodiment of the present invention is configured in cooperation with a refrigerant guide cover, and (a) shows the inverter case on the lid side.
  • the perspective view seen from (b) is the perspective view which looked at this inverter case from the circuit accommodating part side.
  • FIG. 18 is an enlarged vertical cross-sectional view of the main part showing the configuration in the vicinity of the intake refrigerant passage of FIG.
  • FIG. 19 is a perspective view of the inverter case of FIG. 18 of an electric compressor according to another modification of the fourth embodiment of the present invention as viewed from the lid portion side where the intake refrigerant passage is provided.
  • FIG. 20 is an enlarged vertical sectional view showing a main part of the configuration near the intake refrigerant passage of FIG.
  • FIG. 1 is a front sectional view showing a schematic configuration of the electric compressor according to the first embodiment of the present invention
  • FIG. 2 is an enlarged vertical sectional view of a main part showing a configuration in the vicinity of the intake refrigerant passage of FIG.
  • the electric compressor 1 of 1st Embodiment shown in FIG. 1 drives the compression mechanism 3 with the electric motor 5, and compresses a refrigerant
  • the electric compressor 1 includes a compression mechanism 3 and an electric motor 5, a housing 7 (main body housing) in which these are accommodated, and a drive circuit for the electric motor 5. And an inverter case 11 in which the inverter circuit 9 (drive circuit) is accommodated.
  • the electric motor 5 has a rotor 5b attached to the rotating shaft 5a and a stator 5c disposed outside the rotor 5b.
  • the stator 5c has teeth (not shown) corresponding to a plurality of poles, and a coil 5d is wound around each tooth.
  • the electric motor 5 rotates the rotor 5b by generating a rotating magnetic field in the stator 5c by applying a voltage in a predetermined pattern to each coil 5d.
  • the compression mechanism 3 includes a pair of side blocks 3a and 3b, a cylinder block 3c sandwiched between them, and a columnar rotor 3e accommodated in an elliptical cylinder chamber 3d formed inside the cylinder block 3c. is doing.
  • the rotor 3e is formed integrally with the rotating shaft 5a of the electric motor 5, and a plurality of vanes (not shown) are supported on the circumferential surface of the rotor 3e so as to be able to appear and retract.
  • each vane of the rotor 3e appears and disappears following the inner peripheral surface of the cylinder chamber 3d, and the two vanes adjacent to the rotor 3e and the cylinder chamber 3d
  • the volume of the configured space changes. Then, while the space volume increases, low-pressure refrigerant is sucked through a suction port (not shown) formed in the side block 3a, and the sucked refrigerant is compressed as the space volume decreases.
  • the compressed high-pressure refrigerant is discharged from a discharge port (not shown) formed in the side block 3b.
  • the housing 7 has a cylindrical shape with one end closed.
  • the housing 7 accommodates the compression mechanism 3, and the accommodated compression mechanism 3 exposes the inside of the housing 7 to the closed discharge chamber 7 a on the closed side where the side block 3 b is exposed and the side block 3 a. It is partitioned off from the suction chamber 7b on the opening side.
  • An electric motor 5 is accommodated in the suction chamber 7 b, and the suction chamber 7 b is sealed by an inverter case 11 attached to the opening 7 c of the housing 7.
  • the inverter case 11 is disposed outside the suction chamber 7b (housing 7), which closes the suction chamber 7b by closing the opening 7c of the housing 7 and seals the suction chamber 7b, and accommodates the inverter circuit 9. And a circuit housing portion 11b (circuit housing).
  • the lid portion 11a includes a suction port 11c that communicates with the outside of the housing 7 and the suction chamber 7b in a state where the opening 7c of the housing 7 is closed, and a partition wall 11d that partitions the suction chamber 7b and the circuit housing portion 11b.
  • the suction port 11c is a port for sucking low-temperature and low-pressure refrigerant compressed by the compression mechanism 3 into the suction chamber 7b from the outside of the electric compressor 1, and is a surface 11e (the other surface) exposed to the suction chamber 7b of the partition wall 11d.
  • the circuit accommodating portion 11b has a bottomed cylindrical shape with the partition wall 11d as a bottom portion.
  • the circuit board 9a of the inverter circuit 9 is fixed to the surface 11f (one surface) of the partition wall 11d exposed to the circuit housing portion 11b.
  • the circuit housing portion 11b is sealed by a cap 11h attached to the opening 11g.
  • a power switching element 9b such as an IGBT or a MOSFET constituting the inverter circuit 9, a capacitor 9c for a smoothing filter circuit, a coil 9d, and the like are mounted.
  • the casing of the power switching element 9b is in surface contact with a contact portion 11i (contact portion) located at the upper portion of the surface 11f of the partition wall 11d so that heat can be transferred.
  • the housings of the capacitor 9c and the coil 9d are also disposed in close contact with or in contact with the nearest part of the surface 11f.
  • the suction refrigerant passage 13 is formed on the surface 11e opposite to the surface 11f provided with the contact portion 11i of the partition wall 11d.
  • the suction refrigerant passage 13 is a passage that guides the refrigerant from the outside of the electric compressor 1 (for example, the evaporator of the refrigeration cycle) that has passed through the suction port 11c to the suction chamber 7b sealed by the lid portion 11a.
  • the suction refrigerant passage 13 has a check valve 15 and a connection member 17.
  • the check valve 15 allows the refrigerant to pass through the suction refrigerant passage 13 from the outside of the electric compressor 1 toward the suction chamber 7b, and allows the refrigerant to pass through the suction refrigerant passage 13 from the suction chamber 7b toward the outside of the electric compressor 1. To prevent backflow.
  • the connection member 17 connects the check valve 15 to the suction port 11c.
  • the check valve 15 has a cylindrical valve case 15a having both ends opened, and a valve body 15b accommodated in the valve case 15a.
  • One end (upper end) of the valve case 15a is connected to the suction port 11c by a cylindrical connecting member 17, and the other end (lower end) of the valve case 15a is connected through a suction chamber communication path 11j that penetrates the partition wall 11d. And communicates with the suction chamber 7b.
  • the valve body 15b is configured to be movable in the both end directions (vertical direction) of the valve case 15a, and is urged toward the upper end side of the valve case 15a by the elastic force of the coil spring 15c disposed below the valve body 15b. Has been. When the valve body 15b moves to the uppermost side in the valve case 15a, the valve body 15b comes into contact with the connecting member 17 and the valve case 15a is closed.
  • an opening 15d is formed on the peripheral surface of the valve case 15a to allow communication between the inside of the valve case 15a and the outside (suction chamber 7b).
  • the opening 15d is located above the valve body 15b and communicates the suction port 11c with the suction chamber 7b when the valve body 15b is positioned on the lower end side of the valve case 15a.
  • the valve body 15b contacts the connecting member 17 to close the valve case 15a, the internal space below the valve body 15b of the valve case 15a is communicated with the suction chamber 7b.
  • valve case of the check valve 15 corresponds to the size of the contact portion 11i with which the power switching element 9b of the partition wall 11d contacts.
  • the lengths of 15a and opening 15d may be shortened.
  • the valve body 15b is separated from the connection member 17 by the pressure of the refrigerant sucked from the suction port 11c, and resists the urging force of the coil spring 15c. Then, the valve is opened by moving downward from the opening 15d.
  • the opened check valve 15 allows the refrigerant flowing into the suction refrigerant passage 13 from the suction port 11c to flow into the suction chamber 7b from the outlet 13a.
  • the check valve 15 stops the electric compressor 1, the refrigerant pressure in the suction chamber 7b rises due to the refrigerant flowing back from the discharge chamber 7a through the compression mechanism 3, and the suction chamber communication path 11j passes through the suction chamber 7b.
  • the refrigerant pressure in the suction chamber 7b introduced into the lower end of the valve case 15a through the suction port 11c exceeds the pressure of the refrigerant introduced into the upper end of the valve case 15a through the suction port 11c.
  • valve body 15b moves to the upper end of the valve case 15a and comes into contact with the connection member 17, and the refrigerant in the suction chamber 7b flowing into the valve case 15a through the opening 15d is It is blocked by the valve body 15b and the backflow to the suction port 11c side is prevented.
  • the opening 15d of the valve case 15a shown in FIG. 2 and FIG. 3 (a) is formed on the partition wall 11d side of the peripheral surface of the valve case 15a.
  • two openings 15d and 15d are formed on the peripheral surface of the valve case 15a.
  • the two openings 15d and 15d are respectively opened toward the two thin portions 11k and 11k in which the partition wall 11d is locally thin.
  • the thin-walled portions 11k and 11k are formed at locations located on the back side of the contact portion 11i on the surface 11e of the partition wall 11d.
  • the opening 15d is exposed to the thin portion 11k by fixing the portion between the opening portions 15d of the valve case 15a to a rib 11l between the thin portions 11k on the surface 11e of the partition wall 11d.
  • the valve case 15a can be attached to the partition wall 11d at the position.
  • each thin part 11k of the partition wall 11d does not necessarily need to be formed on the surface 11e of the partition wall 11d with a length extending over the entire length of the valve case 15a. That is, for example, the inverter case shown in the partially cutaway perspective view of FIG. 4 only needs to secure a flow path through which the refrigerant flowing through the opening 15d and flowing out of the valve case 15a goes to the suction chamber 7b.
  • the thin-walled portion 11k may be formed with a shorter length, such as the length of the opening 15d over the entire length in the up-down direction, such as 11.
  • a part of the peripheral surface of the valve case 15a is You may form the corner
  • the surface 11e of the partition wall 11d is provided with a holding portion (not shown) having an arc surface matching the outer shape of the peripheral surface of the valve case 15a, and a portion corresponding to the corner portion 15e of the holding portion.
  • fitting portions 11m, 11m positioning portions, concave portions
  • fitting portions 11m, 11m positioning portions, concave portions
  • the valve case 15a is the circumferential direction with respect to the surface 11e of the partition wall 11d. Is positioned.
  • valve case 15a is placed against the surface 11e of the partition wall 11d by the corner portion 15e of the valve case 15a and the fitting portion 11m of the partition wall 11d.
  • a positioning portion 19 is configured for positioning in the circumferential direction 15a.
  • the positioning portion 19 has a projection 15f (positioning portion, convex portion) formed at the lower end of the valve case 15a.
  • a fitting hole 11n positioning portion, recess formed on the surface 11e of the partition wall 11d and into which the protrusion 15f is fitted.
  • the fitting hole may be formed on the lower end of the valve case 15a, and the protrusion may be formed on the surface 11e of the partition wall 11d.
  • an opening 15d is formed on the peripheral surface of the cylindrical valve case 15a of the check valve 15 of the intake refrigerant passage 13 toward the thin portion 11k formed at the back side of the contact portion 11i on the surface 11e of the partition wall 11d. Formed.
  • the suction refrigerant flowing into the valve case 15a from the suction port 11c and passing through the opening 15d is sprayed to the thin portion 11k of the surface 11e of the partition wall 11d. Therefore, the refrigerant sucked from the suction port 11c is allowed to pass along the thin portion 11k of the surface 11e of the partition wall 11d, which is the back side portion of the contact portion 11i with which the power switching element 9b is contacted, and the partition wall 11d
  • the power switching element 9b can be more effectively cooled by the suction refrigerant.
  • the positioning part 19 (refer FIG.3 (b) and FIG.5 (a), (b)) which positions the valve case 15a in the circumferential direction of the valve case 15a with respect to the surface 11e of the partition wall 11d is abbreviate
  • the thin wall portion 11k is formed at a location facing the opening portion 15d of the surface 11e of the partition wall 11d, a passage for allowing the suction refrigerant that has passed through the opening portion 15d to flow into the suction chamber 7b is provided. It can be easily secured by the presence of the thin portion 11k. However, if the passage for allowing the suctioned refrigerant that has passed through the opening 15d to flow into the suction chamber 7b can be secured by the gap between the surface 11e of the partition wall 11d and the suction refrigerant passage 13, for example, the thin portion 11k. May be omitted.
  • the intake refrigerant passage 13 has the check valve 15, and the valve case 15a of the check valve 15 has the opening 15d.
  • the suction refrigerant passage 13 is configured by only a cylindrical member, and an opening is formed on the peripheral surface of the cylindrical member toward the back side portion of the contact portion 11i on the surface 11e of the partition wall 11d. Also good.
  • FIG. 6 is a front sectional view showing a schematic configuration of an electric compressor according to a second embodiment of the present invention
  • FIG. 7 is an enlarged vertical sectional view showing an essential part of the configuration near the intake refrigerant passage of FIG.
  • the electric compressor 1A of the second embodiment shown in FIG. 6 is the same as that shown in FIGS. 1 to 5 except for the configuration of the intake refrigerant passage 13 and the structure of the portion that supports the intake refrigerant passage 13 on the surface 11e of the partition wall 11d. It has the same configuration as the electric compressor 1 of the first embodiment described with reference to the above.
  • the suction refrigerant passage 13 of the electric compressor 1A includes a cylindrical member 21 and a connecting member 17.
  • the cylindrical member 21 has a main body 21 a that is open at one end, and the other end of the main body 21 a is blocked by a tapered surface 21 b that is inclined with respect to the central axis of the cylindrical member 21. It is.
  • One end (upper end) of the main body 21a is connected to the suction port 11c by a cylindrical connecting member 17.
  • An opening 21c is formed on the peripheral surface of the main body 21a to allow communication between the inside of the cylindrical member 21 and the outside (suction chamber 7b).
  • the other end (lower end) of the main body 21a closed by the tapered surface 21b is supported by a support rib 11o protruding from the surface 11e of the partition wall 11d.
  • Two openings 21c on the peripheral surface of the main body 21a are provided in the same manner as the openings 15d and 15d of the valve case 15a of the electric compressor 1 of the first embodiment shown in FIG. 3 (b). And the peripheral surface part between each opening part 21c is a state which supported the other end (lower end) of the cylindrical member 21 with the support rib 11o of the partition wall 11d, as shown in FIG. It abuts on the rib 11l between each thin part 11k in the surface 11e of the partition wall 11d shown.
  • the cylindrical member is arranged in a direction in which each opening 21c shown in FIG. 7 is opened toward the two thin portions 11k and 11k located on the back side of the contact portion 11i on the surface 11e of the partition wall 11d. 21 is positioned with respect to the surface 11e of the partition wall 11d. Furthermore, the cylindrical member 21 is fixed to the partition wall 11d in the above-described positioning state by press-fitting the connecting member 17 inserted from the suction port 11c into one open end of the main body 21a.
  • the suction refrigerant flowing into the main body 21a of the cylindrical member 21 from the suction port 11c is guided to the respective openings 21c by the tapered surfaces 21b.
  • coolant which passed each opening part 21c is the thin wall of the surface 11e of the partition wall 11d similarly to the suction
  • the refrigerant sucked from the suction port 11c is allowed to pass along the thin portion 11k of the surface 11e of the partition wall 11d, which is the back side portion of the contact portion 11i with which the power switching element 9b is contacted, and the partition wall 11d
  • the power switching element 9b can be more effectively cooled by the suction refrigerant.
  • coolant which flowed into the main body 21a of the cylindrical member 21 from the suction port 11c like the electric compressor 1A of the modification of 2nd Embodiment shown in the front sectional view of FIG. 8 or the principal part expanded longitudinal sectional view of FIG. A part thereof may be blown out below the support ribs 11o of the partition wall 11d by a nozzle 21e formed on the bottom surface 21d of the main body 21a.
  • the back side part of the part which arrange
  • the cooling efficiency of the condenser 9c and the coil 9d by the refrigerant can be improved by spraying the refrigerant from the nozzle 21e.
  • the bottom surface 21d of the other end (lower end) of the main body 21a is not the tapered surface 21b of the second embodiment but the central axis of the cylindrical member 21. On the other hand, it is a flat surface perpendicular to the surface. Even if comprised in that way, the refrigerant
  • the bottom surface 21d may be an inclined surface like the tapered surface 21b of the second embodiment.
  • FIG. 10 is a front sectional view showing a schematic configuration of the electric compressor according to the third embodiment of the present invention
  • FIGS. 11A and 11B are front side views of the refrigerant guide cover constituting the intake refrigerant passage of FIG.
  • FIG. 12 is an enlarged vertical cross-sectional view of the main part showing the configuration in the vicinity of the intake refrigerant passage of FIG. 10.
  • the electric compressor 1B of the third embodiment shown in FIG. 10 is the same as that shown in FIGS. 1 to 5 except for the configuration of the suction refrigerant passage 13 and the structure of the portion that supports the suction refrigerant passage 13 on the surface 11e of the partition wall 11d. It has the same configuration as the electric compressor 1 of the first embodiment described with reference to the above.
  • the suction refrigerant passage 13 of the electric compressor 1B of the third embodiment has a refrigerant induction cover 23.
  • the refrigerant guide cover 23 has a connecting portion 23a in which a semicircular portion of a cylindrical end surface is cut out, and an internal space that continues to the connecting portion 23a. And a main body 23b.
  • the cover main body 23b has an opening 23c communicating with the internal space.
  • the above-described refrigerant induction cover 23 is attached to the surface 11e of the partition wall 11d by attachment screws (or bolts) (not shown) inserted through attachment flanges 23e formed on both sides of the cover body 23b.
  • the connecting portion 23a of the refrigerant guiding cover 23 is connected to the suction port 11c as shown in FIG. Further, the cover main body 23b is in a state in which the open end where the opening 23c opens is brought into contact with the portion between the two thin portions 11k and 11k of the surface 11e of the partition wall 11d shown in FIG. Accordingly, the opening 23c of the cover main body 23b is opposed to each thin portion 11k across both the thin portions 11k and 11k.
  • derivation cover 23 cooperates with the partition wall 11d (the surface 11e), and comprises the suction
  • the refrigerant guide cover 23 is attached to the surface 11e of the partition wall 11d by means of mounting screws (or bolts). Therefore, in the electric compressor 1A of the second embodiment, the surface 11e of the partition wall 11d is attached. The provided support rib 11o is omitted.
  • the suction refrigerant flowing into the cover body 23b from the suction port 11c through the connection portion 23a of the refrigerant guide cover 23 is connected in the internal space of the cover body 23b. It is guided to the opening 23c side of the cover body 23b which is an opening other than the portion 23a. And the refrigerant
  • the refrigerant sucked from the suction port 11c is allowed to pass along the thin portion 11k of the surface 11e of the partition wall 11d, which is the back side portion of the contact portion 11i with which the power switching element 9b is contacted, and the partition wall 11d
  • the power switching element 9b can be more effectively cooled by the suction refrigerant.
  • the suction port 11c is connected to the refrigerant guide cover 23 via the connection portion 23a.
  • the back side part of the part which arrange
  • the cooling efficiency of the condenser 9c and the coil 9d by the refrigerant can be improved by blowing the refrigerant from the nozzle 23d.
  • the separate components (check valve 15, cylindrical member 21) in which the suction refrigerant passage 13 and the opening thereof are connected to the suction port 11 c.
  • the refrigerant induction cover 23) is used.
  • a structure constituting the suction refrigerant passage 13 may be provided in the lid portion 11a of the inverter case 11 connected to the suction port 11c.
  • FIG. 15 is a front sectional view showing a schematic configuration of an electric compressor according to a fourth embodiment of the present invention
  • FIG. 16 is an enlarged vertical sectional view of a main part showing a configuration near the intake refrigerant passage of FIG.
  • the electric compressor 1C of the fourth embodiment shown in FIG. 15 is the same as that shown in FIGS. 1 to 5 except for the configuration of the intake refrigerant passage 13 and the structure of the portion that supports the intake refrigerant passage 13 on the surface 11e of the partition wall 11d. It has the same configuration as the electric compressor 1 of the first embodiment described with reference to the above.
  • the suction refrigerant passage 13 of the electric compressor 1C of the fourth embodiment is formed integrally with the lid portion 11a of the inverter case 11 so as to be continuous with the suction port 11c.
  • the suction refrigerant passage 13 includes a refrigerant guide wall 11p extending from the suction port 11c to the inside of the lid portion 11a along the partition wall 11d, and a refrigerant farthest from the inner peripheral surface of the lid portion 11a. And an inclined portion 11q provided at the terminal portion of the guide wall 11p.
  • the inclined portion 11q has an arc shape that approaches the surface 11e of the partition wall 11d toward the end (lower end) which is a free end.
  • An opening 11r is formed between the end of the inclined portion 11q and the surface 11e of the partition wall 11d. A refrigerant flow from the suction port 11c toward the opening 11r is generated in the suction refrigerant passage 13.
  • the refrigerant moves toward the opening 11r.
  • the inclined portion 11q is guided to the back side portion side of the contact portion 11i where the power switching element 9b of the surface 11f of the partition wall 11d is contacted.
  • the refrigerant sucked from the suction port 11c is passed along the back side portion of the contact portion 11i with which the power switching element 9b is in contact, and the power switching element 9b is sucked by the suction refrigerant through the partition wall 11d. It can cool more effectively.
  • the refrigerant guide wall 11p has an arc shape and the opening 11r has a D-cut shape or a semicircular shape.
  • the inclined portion 11q that connects the guide wall 11p and the opening 11r may be a tapered surface that is inclined with respect to the central axis direction of the arc of the refrigerant guide wall 11p, that is, the refrigerant flow direction in the suction refrigerant passage 13. .
  • the power switching element 9b on the surface 11f of the partition wall 11d is located directly behind the contact portion 11i with which the power switching element 9b is in contact.
  • the refrigerant that has passed through the opening 11r is sprayed on the recessed portion of the surface 11e of the partition wall 11d.
  • the inclined portion 11q of the suction refrigerant passage 13 in the previous modification is used, and the refrigerant guide wall 11p is the central axis of the arc.
  • the refrigerant that has passed through the suction refrigerant passage 13 collides with the bottom surface 11s to generate a flow of the refrigerant toward the opening 11r side, and the refrigerant that has passed through the opening 11r becomes the surface of the partition wall 11d. It comes to be sprayed on the back side location of the contact part 11i with which the electric power switching element 9b was contacted among 11e.
  • the refrigerant sucked from the suction port 11c is allowed to pass along the back side portion of the contact portion 11i with which the power switching element 9b is in contact with the surface 11e of the partition wall 11d.
  • the power switching element 9b can be more effectively cooled by the sucked refrigerant through the partition wall 11d.
  • the present invention can be used in an electric compressor in which a refrigerant compression mechanism is driven by an electric motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Compressor (AREA)

Abstract

La présente invention concerne un compresseur à commande électrique (1) qui est pourvu de : un boîtier de circuit (11b) dans lequel est logé un circuit de commande (9) pour un moteur électrique (5), le boîtier de circuit (11b) étant séparé d'un boîtier de corps (7) par une paroi de séparation (11d) ; un élément de génération de chaleur (9b) du circuit de commande (9), l'élément de génération de chaleur (9b) étant conçu pour être en contact avec la partie de contact (11i) d'une surface (11f) de la paroi de séparation (11d), la surface (11f) étant exposée dans le boîtier de circuit (11b) ; un passage de réfrigérant aspiré (13) disposé sur l'autre surface (11e) de la paroi de séparation (11d), qui est exposé dans le boîtier de corps (7), et permettant qu'un réfrigérant aspiré depuis l'extérieur du boîtier de corps (7) dans l'intérieur s'écouler à travers celui-ci ; et une ouverture (15d, 21c, 23c, 11r) formée dans le passage de réfrigérant aspiré (13) et guidant le réfrigérant, qui s'écoule à travers le passage de réfrigérant aspiré (13), de sorte que le réfrigérant s'écoule vers la partie de contact (11i).
PCT/JP2016/062740 2015-06-19 2016-04-22 Compresseur à commande électrique WO2016203845A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2015-123805 2015-06-19
JP2015123805 2015-06-19
JP2016049141A JP2017008922A (ja) 2015-06-19 2016-03-14 電動コンプレッサ
JP2016-049141 2016-03-14

Publications (1)

Publication Number Publication Date
WO2016203845A1 true WO2016203845A1 (fr) 2016-12-22

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PCT/JP2016/062740 WO2016203845A1 (fr) 2015-06-19 2016-04-22 Compresseur à commande électrique

Country Status (1)

Country Link
WO (1) WO2016203845A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018168831A (ja) * 2017-03-30 2018-11-01 株式会社豊田自動織機 電動圧縮機

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012215091A (ja) * 2011-03-31 2012-11-08 Toyota Industries Corp 電動圧縮機
JP2015001160A (ja) * 2013-06-13 2015-01-05 株式会社豊田自動織機 電動圧縮機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012215091A (ja) * 2011-03-31 2012-11-08 Toyota Industries Corp 電動圧縮機
JP2015001160A (ja) * 2013-06-13 2015-01-05 株式会社豊田自動織機 電動圧縮機

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2018168831A (ja) * 2017-03-30 2018-11-01 株式会社豊田自動織機 電動圧縮機

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