JP4635826B2 - Scroll compressor - Google Patents

Description

  The present invention relates to a scroll compressor used for an air conditioner, a refrigerator, or the like.

  Conventionally, the scroll compressor includes a first scroll and a second scroll having spiral wraps, and the first and second scrolls are rotated by rotating the first and second scrolls in the same direction. There is one that compresses the refrigerant by reducing the volume of the compression chamber while moving the compression chamber formed by meshing the laps from the outside to the center (for example, JP-A-4-76286 (Patent Document 1). )reference). In this scroll compressor, a check valve is provided at the opening of the discharge hole so that the check valve is opened during operation, and the check valve is closed when stopped, so that the refrigerant flows back into the compression chamber through the discharge hole. Prevents reverse rotation of the first and second scrolls.

However, the scroll compressor has a drawback in that a check valve is provided at the opening of the discharge hole, resulting in a complicated structure and high cost.
JP-A-4-76286

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a scroll compressor that can prevent the reverse rotation of the scroll at the time of stopping at a low cost with a simple configuration.

In order to achieve the above object, a scroll compressor according to the present invention provides:
A fixed scroll having a spiral wrap;
A orbiting scroll having a spiral wrap meshing with the spiral wrap of the fixed scroll;
A motor that drives the orbiting scroll via a rotating shaft ,
By rotating the orbiting scroll without rotating by the motor, the compression chamber formed between the fixed scroll wrap and the orbiting scroll wrap is moved from the outside toward the center while the compression chamber is moved. A scroll compressor that compresses the refrigerant by reducing the volume of
When the revolution of the orbiting scroll is stopped, an angle by which the orbiting scroll is rotated by a predetermined angle in the orbiting direction around the rotating shaft (35) with respect to the orbiting scroll state that does not rotate during operation. A shift unit is provided.

According to the scroll compressor having the above configuration, the orbiting scroll is revolved by the motor without rotating, thereby being formed between the spiral wrap of the fixed scroll and the spiral wrap of the orbiting scroll. The refrigerant is compressed by reducing the volume of the compression chamber while moving the compression chamber from the outside toward the center. When the orbiting scroll is stopped , the orbiting scroll is rotated by a predetermined angle in the orbiting direction around the rotation axis with respect to the orbiting scroll state that revolves without rotating during operation by the angle shift unit. Since the wrap is pressed radially outward from the inside of the fixed scroll, the turning of the orbiting scroll is restricted, and the reverse rotation of the orbiting scroll can be prevented even if the refrigerant flows backward from the discharge side to the compression chamber. Thereby, generation | occurrence | production of the abnormal noise by reverse rotation can be prevented.

Moreover, the scroll compressor of one embodiment is
The angle shift unit is
An Oldham support plate that supports the Oldham for revolving motion without rotating the orbiting scroll, and is rotatably supported on the main body side,
An elastic member for biasing the Oldham support plate in a direction opposite to the revolution direction of the orbiting scroll;
When the orbiting scroll revolves, the rotational force of the rotation shaft of the motor is not transmitted to the Oldham support plate, and the orbiting scroll revolves in the direction opposite to the revolving direction and the rotation shaft of the motor rotates in the reverse direction. And a transmission mechanism for transmitting the rotational force of the rotating shaft of the motor to the Oldham support plate against the biasing force of the elastic member.

  According to the scroll compressor of the above embodiment, when the orbiting scroll is revolved without rotating by the motor, the rotational force of the rotating shaft of the motor is not transmitted to the Oldham support plate, and the orbiting scroll is in the orbiting direction. When the rotating shaft of the motor rotates in the reverse direction and reversely rotates, the rotating force of the rotating shaft of the motor is transmitted to the Oldham support plate by the transmission mechanism against the biasing force of the elastic member. The wrap is pressed radially outward from the inside against the fixed scroll wrap. Therefore, reverse rotation of the orbiting scroll can be easily prevented.

The scroll compressor of the present invention is
A first rotating scroll having a spiral wrap;
A second rotary scroll having a spiral wrap meshing with the spiral wrap of the first scroll;
A first motor for driving the first rotary scroll;
A second motor for driving the second rotary scroll in the same rotational direction as the first rotary scroll;
By rotating the first rotary scroll and the second rotary scroll with the rotation angle shifted by a predetermined angle by the first motor and the second motor, the wrap of the first rotary scroll and the above A scroll compressor that compresses the refrigerant by reducing the volume of the compression chamber while moving the compression chamber formed between the second rotating scroll and the wrap from the outside toward the center,
A controller for controlling the first motor and the second motor;
The control unit, when stopping the rotation of the first rotating scroll and the second circular scrolling, upon rotation of the upper Symbol first rotating scroll and the second rotating scroll is shifted by a predetermined angle the rotation angle The rotation angles of the first motor and the second motor so that one of the first rotary scroll and the second rotary scroll further deviates from the other by a predetermined angle in the rotation direction. It is characterized by controlling.

According to the scroll compressor having the above configuration, the first and second rotary scrolls are rotated by rotating the first and second rotary scrolls while the rotation angles are shifted by a predetermined angle by the first and second motors. The refrigerant is compressed by reducing the volume of the compression chamber while moving the compression chamber formed between the wraps from the outside toward the center. Then, when stopping the first, second rotating scroll, first the control unit controls the second motor, when rotation of the first, the second rotating scroll is shifted a predetermined angle the rotation angle When one of the first and second rotary scrolls is further deviated from the other by a predetermined angle in the rotational direction with respect to the other, one of the first and second rotary scrolls becomes the other wrap. Since it is pressed radially outward from the inside of the wrap, the rotation of the first and second rotary scrolls is restricted, and the reverse of the first and second rotary scrolls even if the refrigerant flows backward from the discharge side to the compression chamber. Rotation can be prevented.

The scroll compressor of the present invention is
A fixed scroll having a spiral wrap;
A orbiting scroll having a spiral wrap that meshes with the spiral wrap of the fixed scroll; and
A rotating shaft that supports the orbiting scroll so as to revolve,
Revolution having a plurality of magnets arranged at a predetermined interval in the circumferential direction on the outer peripheral side of the orbiting scroll, and a plurality of stators for revolving the orbiting scroll without rotating by the magnetic force with respect to the plurality of magnets A motor,
A control unit for controlling the revolving motor,
By revolving the orbiting scroll without rotating by the revolution motor, the compression chamber formed between the fixed scroll wrap and the orbiting scroll wrap is moved from the outside toward the center, and the compression is performed. A scroll compressor that compresses the refrigerant by reducing the volume of the chamber,
When the revolution of the orbiting scroll is stopped, the control unit is configured to cause the orbiting scroll to rotate about a predetermined angle in the orbiting direction around the rotation axis with respect to the orbiting scroll that revolves without revolving during operation. The rotation angle of the revolution motor is controlled.

According to the scroll compressor having the above-described configuration, the revolving motor controlled by the control unit revolves the revolving scroll without rotating, so that the swirl wrap of the fixed scroll and the swirl wrap of the revolving scroll mesh with each other. The refrigerant is compressed by reducing the volume of the compression chamber while moving the compression chamber formed between and toward the center from the outside. When the orbiting scroll is stopped, the rotation angle of the revolution motor is controlled by the control unit, and the orbiting scroll is set in the orbiting direction around the rotation axis with respect to the orbiting scroll state that revolves without rotating during operation. By rotating at an angle , the orbiting scroll wrap is pressed radially outward from the fixed scroll lap from the inside, so that the orbiting scroll is restricted from turning and the orbiting scroll even if refrigerant flows backward from the discharge side to the compression chamber. Can prevent reverse rotation. Thereby, generation | occurrence | production of the abnormal noise by reverse rotation can be prevented.

  As is clear from the above, according to the scroll compressor of the present invention, it is possible to realize a scroll compressor that can prevent the reverse rotation of the scroll at the time of stopping at a low cost with a simple configuration.

  Hereinafter, the scroll compressor of this invention is demonstrated in detail by embodiment of illustration.

(First embodiment)
FIG. 1 is a longitudinal sectional view of a scroll compressor according to a first embodiment of the present invention. The scroll compressor includes an axial gap type motor 2 disposed in the sealed container 1, and a compression unit 3 disposed in the sealed container 1 and below the motor 2 and driven by the motor 2. Yes. Here, the upper side means the upper side along the central axis of the sealed container 1 regardless of whether the central axis of the sealed container 1 is inclined with respect to the horizontal plane.

  The compression unit 3 includes a main body 30 attached in the sealed container 1, a fixed scroll 31 fixed to the main body 30, and the fixed scroll 31, and the Oldham ring 8 and Oldham support are supported on the main body 30. The orbiting scroll 32 is supported through the plate 9 so as to be able to revolve. That is, the compression unit 3 has a single-turn structure in which one orbiting scroll 32 revolves without rotating.

  The fixed scroll 31 includes an end plate 31a and a spiral wrap 31b provided upright on the end plate 31a, and the orbiting scroll 32 includes an end plate 32a and a spiral shape provided upright on the end plate 32a. And a wrap 32b. A plurality of compression chambers 33 are formed by meshing the wrap 31b of the fixed scroll 31 and the wrap 32b of the orbiting scroll 32 with each other.

  A boss 32 c is erected on the lower side of the end plate 32 a of the orbiting scroll 32. The rotating shaft 35 is inserted into the main body 30 and the lower end side of the rotating shaft 35 is rotatably supported by the bearing 4. On the upper end side of the rotary shaft 35, an eccentric shaft 65 a that fits in the boss 32 c of the orbiting scroll 32 is provided at a position that is eccentric with respect to the axis of the rotary shaft 35. That is, the orbiting scroll 32 can revolve around the rotation axis 35.

  A suction pipe 6 communicating with the inside of the compression chamber 33 from the outside of the hermetic container 1 is connected to the fixed scroll 31. The fixed scroll 31 is provided with a discharge hole 34 for discharging the compressed refrigerant from the compression chamber 33 to the outside. The sealed container 1 is filled with a high-pressure refrigerant discharged from the compression unit 3. This scroll compressor is a so-called high-pressure dome type. Further, one end of a discharge pipe 7 is connected to the upper side of the closed container 1, and a high-pressure refrigerant is discharged from the discharge pipe 7 to the outside of the closed container 1.

  The motor 2 on the lower side of the main body 30 includes a stator 21 attached to the main body 30 and a rotor attached to the rotating shaft 35 in an axial direction (downward) of the stator 21 via an air gap. 26.

  In addition, the scroll compressor includes a control unit 10 that controls the current flowing through the coil 22. Note that a flexible electric wire or a slip electrode is used for power supply to the coil 22, for example.

  As shown in FIGS. 1 and 2, the stator 21 includes an iron core 23 attached to a surface opposite to the main body 30 and a coil 22 wound around the iron core 23.

  The iron core 23 has an annular base 24a disposed so as to be substantially orthogonal to the rotation shaft 35, and a protrusion 24b provided on one surface of the base 24a on the rotor 26 side.

  The protrusions 24 b extend along the axial direction of the rotation shaft 35, and a plurality of the protrusions 24 b are provided around the rotation shaft 35. The coil 22 is wound around the axis of each protrusion 24b. That is, a plurality of the coils 22 are provided in the circumferential direction of the stator 21. The coil 22 is excited to generate a magnetic flux in the protruding direction of the protrusion 24b.

  The stator 21 includes a stator plate 25 that sandwiches the coil 22 in cooperation with the iron core 23. The stator plate 25 is made of a magnetic material, and is provided with a plurality of magnetically insulating slits 25a at positions corresponding to spaces between adjacent protrusions 24b. The slits 25a extend radially from the center of the stator plate 25 radially outward. With this configuration, the stator core area facing the air gap increases, so that the flux linkage can be increased. The stator plate 25 is not essential.

  The rotor 26 is fixed to the rotating shaft 35 and has an annular back yoke 28 made of a magnetic material, and a permanent magnet 27 provided on one surface of the back yoke 28 on the stator 21 side.

  The permanent magnet 27 generates a magnetic flux in a direction along the rotation shaft 35. A plurality of the permanent magnets 27 are provided in the circumferential direction of the rotor 26. Adjacent permanent magnets 27 have different magnetic poles. A space 27 a is formed between the permanent magnets 27. The permanent magnet 27 is not essential.

  The rotor 26 has a rotor plate 29 that sandwiches the permanent magnet 27 in cooperation with the back yoke 28. The rotor plate 29 is made of a magnetic material, and is provided with a slit 29a that magnetically insulates between the adjacent permanent magnets 27 and 27. The slits 29a extend radially outward from the center of the rotor plate 29 in the radial direction. With this configuration, the area of the rotor core facing the air gap increases, so that the flux linkage can be increased. Further, since the demagnetizing field is not directly applied to the permanent magnet 27, the demagnetization resistance is increased. The rotor plate 29 is not essential.

  Next, the operation of this scroll compressor will be described.

  As shown in FIG. 3, the six coils 22 wound around each of the six protrusions 24b are set in the order of U1, V1, W1, U2, V2, and W2 in the counterclockwise direction. . In addition, in FIG. 3, the figure which looked at the stator 21 from the lower side is shown.

  Then, as shown in FIG. 4, the current for rotating the rotor 26 (shown in FIG. 1) counterclockwise when viewed from the bottom surface and causing the orbiting scroll 32 to revolve counterclockwise when viewed from the bottom surface is supplied to each phase. Pass current in order. In FIG. 4, the horizontal axis indicates the rotation angle of the rotor 26, and the vertical axis indicates the current value. Further, the U1 phase and the U2 phase are indicated by solid lines, the V1 phase and the V2 phase are indicated by alternate long and short dashed lines, and the W1 phase and the W2 phase are indicated by broken lines. In FIG. 4, when a positive current is passed through each phase, each phase becomes an N pole, and when a negative current is passed through each phase, each phase becomes an S pole.

  5 to 8 are diagrams for explaining the operation of the orbiting scroll 32 revolving once in four stages. Only the lap 31b of the fixed scroll 31 and the lap 32b of the orbiting scroll 32 are viewed from below. It is a schematic diagram. 5 to 8, PL indicates the compression chamber 33 filled with the low-pressure refrigerant, PM indicates the compression chamber 33 filled with the medium-pressure refrigerant, and PH indicates the compression chamber 33 filled with the high-pressure refrigerant. Is shown.

  As shown in FIGS. 5 to 8, the orbiting scroll 32 revolves counterclockwise, and the compression chamber 33 formed by meshing the wrap 31 b of the fixed scroll 31 and the wrap 32 b of the orbiting scroll 32 is formed from the outside. The volume of the compression chamber 33 decreases while moving to the center. Then, as shown in FIG. 1, the refrigerant sucked from the suction pipe 6 is compressed and then discharged from the discharge pipe 7 through the discharge hole 34.

  Next, FIG. 9 shows a plan view of the Oldham support plate 9 during forward rotation of the scroll compressor. As shown in FIG. 9, the Oldham support plate 9 includes a donut-shaped disk portion 9a and the above-mentioned And a cylindrical portion 9b extending downward from the inner peripheral edge of the disc portion 9a. Key grooves 9c and 9c are provided along the radial direction at positions facing the disk portion 9a.

  FIG. 10 is a perspective view of the Oldham ring 8 of the scroll compressor. As shown in FIG. 10, the Oldham ring 8 is located at the opposite position on the lower side of the annular portion 8a. The main body side keys 80b and 80b provided, and the orbiting scroll side key 80c provided at a position opposed to the upper side of the annular portion 8a and shifted from the main body side keys 80b and 80b by approximately 90 degrees in the circumferential direction. , 80c.

  The main body side keys 80b and 80b of the Oldham ring 8 are slidably fitted in the key grooves 9c and 9c of the Oldham support plate 9 shown in FIG. Similarly, the orbiting scroll-side keys 80c and 80c of the Oldham ring 8 are slidably fitted in a key groove (not shown) provided on the lower side of the end plate 32a of the orbiting scroll 32 shown in FIG.

  The Oldham mechanism including the Oldham ring 8 and Oldham support plate 9 causes the orbiting scroll 32 to revolve without rotating.

  Further, as shown in FIG. 9, a cylindrical portion 92 is externally fitted to the outer periphery of the rotating shaft 35 via eight columnar rollers 91. Further, a cylindrical gear 93 meshes with external teeth (not shown) provided on the outer periphery of the cylindrical portion 92, and is provided outside the gear 93 on the inner peripheral side of the cylindrical portion 9 b of the Oldham support plate 9. The inner teeth (not shown) thus engaged are engaged. A plurality of gears 93 may be used.

  Further, a spring mounting portion 9d is provided on the disc portion 9a of the Oldham support plate 9, and a convex portion 30a protruding from the lower main body portion 30 is disposed in the spring mounting portion 9d, so that the inner wall of the spring mounting portion 9d A coil spring 94 as an example of an elastic member is contracted between the convex portion 30a and the rear side with respect to the rotation direction, and the Oldham support plate 9 is urged in the reverse rotation direction (counterclockwise) by the coil spring 94. ing. In the first embodiment, the coil spring is used as the elastic member, but another elastic member such as a leaf spring may be used.

  The eight rollers 91 and the cylindrical portion 92 constitute a reverse rotation clutch 90. That is, the reverse rotation clutch 90 is configured such that when the rotation shaft 35 rotates forward in the clockwise direction, the rotation of the rotation shaft 35 is not transmitted to the cylindrical portion 92, and when the rotation shaft 35 rotates in the counterclockwise direction, the rotation of the rotation shaft 35 rotates. Is transmitted to the cylindrical portion 92. This is because, when the rotating shaft 35 rotates in the reverse direction, the rollers 91 are arranged on the outer surface of the rotating shaft 35 and the inner surface of the cylindrical portion 92 by a cam surface (not shown) provided on the outer periphery of the rotating shaft 35 or the inner periphery of the cylindrical portion 92. The rotation shaft 35 and the cylindrical portion 92 are connected to each other. The reverse rotation clutch 90 and the gear 93 constitute a transmission mechanism. The Oldham support plate 9, the reverse rotation clutch 90, the gear 93, and the coil spring 94 constitute a rotation angle shift unit.

  When the rotary shaft 35 rotates in the forward direction, a load is applied to the Oldham support plate 9 in the clockwise direction through the Oldham ring 8 in the revolving direction of the orbiting scroll 32, and the coil spring 94 is against Oldham against the clockwise rotational force. The support plate 9 is urged in the reverse direction (counterclockwise). Thus, the Oldham support plate 9 is kept at the position during the normal rotation in a state where the rotational force of the rotary shaft 35 and the biasing force of the coil spring 94 are balanced against the Oldham support plate 9.

  Next, when the rotation of the rotary shaft 35 stops, the refrigerant flows backward from the discharge side to the compression chamber 33, thereby causing a reverse rotation force to the orbiting scroll 32 and reversely rotating the rotary shaft 35.

  As a result, as shown in FIG. 11, the rotating shaft 35 and the cylindrical portion 92 are coupled by the reverse rotation clutch 90, and a clockwise rotational force is applied to the Oldham support plate 9 via the gear 93, and the coil spring 94. The Oldham support plate 9 is further rotated in the clockwise direction against the urging force of the forward rotation than in the normal rotation.

  FIG. 12 is a schematic diagram of the scroll state during normal operation of the scroll compressor, and FIG. 13 is a schematic diagram of the scroll state when the scroll compressor is stopped. In FIGS. Only the wrap 31b of the fixed scroll 31 and the wrap 32b of the orbiting scroll 32 are shown.

  When the orbiting scroll 32 is stopped from the normal operation state shown in FIG. 12, the rotation angle shift unit shifts the rotation angle of the orbiting scroll 32 (only the lap 32a is shown in FIG. 13) by the angle φ in the orbiting direction. As shown in FIG. 13, the wrap 32 a of the orbiting scroll 32 is pressed radially outward from the inner side against the wrap 31 a of the fixed scroll 31. For this reason, the turning of the orbiting scroll 32 is restricted, and the reverse rotation of the orbiting scroll 32 can be prevented even if the refrigerant flows backward from the discharge side to the compression chamber 33. Thereby, generation | occurrence | production of the noise by reverse rotation at the time of a stop can be prevented.

  Therefore, it is possible to realize a scroll compressor that has a simple configuration and can prevent the reverse rotation of the scroll when stopped at a low cost.

  When the orbiting scroll 32 is revolved without rotating by the motor 2, the rotational force of the rotating shaft 35 of the motor 2 is not transmitted to the Oldham support plate 9, and the orbiting scroll 32 is in the direction opposite to the orbiting direction. When the rotating shaft 35 of the motor 2 rotates in the reverse direction, the rotational force of the rotating shaft 35 of the motor 2 is resisted against the biasing force of the coil spring 94 by the transmission mechanism (reverse rotating clutch 90, gear 93). By transmitting to the Oldham support plate 9, the wrap 32 a of the orbiting scroll 32 is pressed against the wrap 31 a of the fixed scroll 31 radially outward from the inside. Therefore, reverse rotation of the orbiting scroll 32 can be easily prevented.

  In the first embodiment, the scroll compressor provided with the rotation angle shift unit including the Oldham support plate 9, the reverse rotation clutch 90, the gear 93, and the coil spring 94 has been described. The phase of the orbiting scroll may be shifted using a plunger or the like. Further, the transmission mechanism is not limited to the configuration of the reverse rotation clutch 90 and the gear 93, and when the orbiting scroll rotates, the rotational force of the rotating shaft of the motor is not transmitted to the Oldham support plate, and the orbiting scroll is opposite to the orbiting direction. It is only necessary to transmit the rotational force of the rotating shaft of the motor to the Oldham support plate against the biasing force of the elastic member when the rotating shaft of the motor rotates in the reverse direction.

(Second Embodiment)
FIG. 14: has shown the longitudinal cross-sectional view which shows the principal part of the scroll compressor of 2nd Embodiment of this invention. The compression unit 40 of the scroll compressor according to the second embodiment includes a first rotary scroll 41 having a spiral wrap 41b and a second rotary scroll 42 having a spiral wrap 42b. That is, the compression unit 40 has a co-rotation structure in which both scrolls rotate.

  The scroll compressor includes an axial gap type first motor 2A for driving the first rotary scroll 41 and an axial gap type second motor 2B for driving the second rotary scroll 42. The first and second motors 2A and 2B have the same configuration as the motor 2 of the scroll compressor of the first embodiment.

  The first motor 2A includes a stator 21 having a coil 22 and a rotor 26 that is disposed in the axial direction of the stator 21 via an air gap and is attached to the end plate 41a of the first rotary scroll 41. ing. The stator 21 is attached to a member such as a main body 30 fixed in the sealed container 1 shown in FIG.

  The second motor 2B includes a stator 21 having a coil 22 and a rotor 26 that is disposed in the axial direction of the stator 21 via an air gap and is attached to the end plate 42a of the second rotary scroll 42. ing. The stator 21 is attached to a member such as a main body 30 fixed in the sealed container 1 shown in FIG.

  Next, the operation of this scroll compressor will be described.

  As shown in the first embodiment (FIG. 4), the first rotating scroll 41 and the second rotating scroll 42 are moved to the first motor 2A and the second motor 2B with the rotation angle shifted by 180 degrees. A current for causing the motor to rotate in the same rotation direction is passed.

  Then, as shown in FIGS. 14 to 17, the first rotating scroll 41 and the second rotating scroll 42 rotate, and the wrap 41 b of the first rotating scroll 41 and the wrap 42 b of the second rotating scroll 42 are connected. While the compression chamber 33 formed by meshing with each other moves from the outside to the center, the volume of the compression chamber 33 decreases to compress the refrigerant.

  When the first and second rotary scrolls 41 and 42 are stopped, the controller 10 controls the first and second motors 2A and 2B so that the first and second rotary scrolls 41 and 42 rotate. By making one of the first and second rotary scrolls 41 and 42 further deviate by a predetermined angle in the rotational direction with respect to the other from the state at the time of rotation with the angle shifted by a predetermined angle (for example, 180 degrees), Since one of the first and second rotary scrolls 41 and 42 is pressed radially outward from the inside with respect to the other wrap, the rotation of the first and second rotary scrolls 41 and 42 is restricted. Even if the refrigerant flows backward from the discharge side to the compression chamber 33, the first and second rotary scrolls 41 and 42 can be prevented from reversely rotating.

  Therefore, it is possible to realize a scroll compressor that has a simple configuration and can prevent the reverse rotation of the scroll when stopped at a low cost.

(Third embodiment)
FIG. 19 is a longitudinal sectional view showing an essential part of a scroll compressor according to a third embodiment of the present invention, and FIG. 20 is a plan view of a part of the essential part of the scroll compressor. The scroll compressor according to the third embodiment has the same configuration as that of the scroll compressor according to the first embodiment shown in FIG. 1 except for an Oldham mechanism and a motor, and the sealed container has dimensions in the axial direction of the rotating shaft. Is shorter than the scroll compressor shown in FIG. In addition, about the turning scroll 52 of FIG. 20, only the end plate 52a is shown and the spiral wrap 52b is abbreviate | omitted.

  As shown in FIG. 19, the compression unit of the scroll compressor includes a main body 50 attached in a sealed container (not shown), a fixed scroll 51 fixed to the main body 50, and the fixed scroll 51. And the orbiting scroll 52 supported by the main body 50 so as to be revolved. That is, the compression unit has a one-way structure in which one orbiting scroll 52 revolves without rotating.

  The fixed scroll 51 includes an end plate 51a and a spiral wrap 51b provided upright on the end plate 51a, and the orbiting scroll 52 includes an end plate 52a and a spiral shape provided upright on the end plate 52a. And a wrap 52b. The wrap 51b of the fixed scroll 51 and the wrap 52b of the orbiting scroll 52 are engaged with each other to form a plurality of compression chambers.

  A boss 52c is erected on the lower side of the end plate 52a of the orbiting scroll 52. Further, a rotation shaft 53 as an example of a support portion is inserted into the main body portion 50, and the rotation shaft 53 is rotatably supported. On the upper end side of the rotating shaft 53, an eccentric shaft 53 a that is fitted in the boss 52 c of the orbiting scroll 52 is provided at a position that is eccentric with respect to the axis of the rotating shaft 53. That is, the orbiting scroll 52 can revolve around the rotation axis 53.

  This scroll compressor has a plurality of magnets 61 arranged in the circumferential direction on the outer peripheral side of the orbiting scroll 32 and a plurality of stators 62 that revolve without rotating the orbiting scroll 32 by the magnetic force applied to the plurality of magnets 61. A revolution motor 60 and a control unit 70 that controls the revolution motor 60 are provided. The plurality of magnets 61 are eight and are arranged at predetermined intervals every 45 degrees in the circumferential direction, and the plurality of stators 62 are twelve, and are arranged at predetermined intervals every 30 degrees in the circumferential direction. Has been placed. By rotating the orbiting scroll 52 without rotating by the revolution motor 60, the compression chamber formed between the wrap 51b of the fixed scroll 51 and the wrap 52b of the orbiting scroll 52 is moved from the outside toward the center. The refrigerant is compressed by reducing the volume of the compression chamber. As described above, the scroll compressor according to the third embodiment does not have an Oldham mechanism because the orbiting scroll 32 is revolved without rotating by the revolving motor 60 without using an Oldham ring or the like.

  In addition, the control unit 70 supplies current to the stator 62 of the revolution motor 60 in order to cause the orbiting scroll 52 to revolve without rotating. For example, in FIG. 20, the magnet 61 on the orbiting scroll 32 side is attracted by the magnetic force of one stator 62 of a pair of opposing stators 62, while the magnet 61 on the orbiting scroll 32 side is pushed by the magnetic force of the other stator 62. By repeating this in order clockwise, the orbiting scroll 52 is revolved clockwise without rotating. Then, the rotation angle of the revolution motor 60 is controlled so that the rotation angle of the turning scroll 52 is shifted in the turning direction when the turning of the turning scroll 52 is stopped.

  When the orbiting scroll 52 is stopped from the normal operation state of the scroll compressor having the above configuration, the control unit 70 shifts the rotation angle of the orbiting scroll 52 in the orbiting direction, whereby the wrap 52a of the orbiting scroll 52 becomes the wrap 51a of the fixed scroll 51. Is pressed radially outward from the inside. For this reason, the turning of the orbiting scroll 52 is restricted, and the reverse rotation of the orbiting scroll 52 can be prevented even if the refrigerant flows backward from the discharge side to the compression chamber. Thereby, generation | occurrence | production of the noise by reverse rotation at the time of a stop can be prevented.

  Therefore, it is possible to realize a scroll compressor that has a simple configuration and can prevent the reverse rotation of the scroll when stopped at a low cost.

  The fixed scroll 51 having a spiral wrap 51b, the orbiting scroll 52 having a spiral wrap 52b that meshes with the spiral wrap 51b of the fixed scroll 51, and a support unit that supports the orbiting scroll 52 in a revolving manner. (53), a plurality of magnets 61 arranged at predetermined intervals in the circumferential direction on the outer peripheral side of the orbiting scroll 52, and a plurality of revolutions for revolving the orbiting scroll 52 without rotating by the magnetic force applied to the plurality of magnets 61. A revolving motor 60 having a stator 62 and a control unit 70 for controlling the revolving motor 60, and the revolving motor 60 revolves the revolving scroll 52 without revolving so that the wrap 51 b of the fixed scroll 51 and the revolving scroll are rotated. The compression chamber formed between 52 wraps (52b) from the outside toward the center While moving Te, according volume of the compression chamber reduces in the scroll compressor for compressing a refrigerant, can be shortened axial dimension with a simple configuration, miniaturization and cost reduction can be easily performed.

  In addition, the scroll compressor of this invention is not limited to the above-mentioned embodiment. For example, the motor is not limited to an axial gap type, and may be a radial gap type motor, or an axial gap type motor and a radial gap type motor may be used in combination.

FIG. 1 is a longitudinal sectional view showing a scroll compressor according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of the motor of the scroll compressor. FIG. 3 is a bottom view of the stator of the motor of the scroll compressor. FIG. 4 is a graph showing the current for rotating the orbiting scroll of the scroll compressor. FIG. 5 is a first explanatory view showing the operation of the scroll compressor. FIG. 6 is a second explanatory diagram following FIG. FIG. 7 is a third explanatory diagram following FIG. FIG. 8 is a fourth explanatory diagram following FIG. FIG. 9 is a plan view of the Oldham support plate during forward rotation of the scroll compressor. FIG. 10 is a perspective view of the Oldham ring of the scroll compressor. FIG. 11 is a plan view of the Oldham support plate during reverse rotation of the scroll compressor. FIG. 12 is a plan view showing a scroll state during normal operation of the scroll compressor. FIG. 13 is a plan view showing a scroll state when the scroll compressor is stopped. FIG. 14 is a longitudinal sectional view showing an essential part of a scroll compressor according to the second embodiment of the present invention. FIG. 15 is a first explanatory view showing the operation of the scroll compressor. FIG. 16 is a second explanatory diagram following FIG. FIG. 17 is a third explanatory diagram following FIG. FIG. 18 is a fourth explanatory diagram following FIG. FIG. 19 is a longitudinal sectional view showing an essential part of a scroll compressor according to the third embodiment of the present invention. FIG. 20 is a plan view showing a part of the main part of the scroll compressor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Airtight container 2 ... Motor 2A ... 1st motor 2B ... 2nd motor 3 ... Compression part 6 ... Intake pipe 7 ... Discharge pipe 8 ... Oldham ring 8a ... Annular part 8b ... Main part side key 8c ... Orbiting scroll side Key 9 ... Oldham support plate 9a ... Disc part 9b ... Cylindrical part 9c ... Key groove 9d ... Spring mounting part 10 ... Control part 21 ... Stator 22 ... Coil 23 ... Iron core 26 ... Rotor 27 ... Permanent magnet 28 ... Back yoke 30 ... Main body portion 30a ... Convex portion 31 ... Fixed scroll 31a ... End plate 31b ... Wrap 32 ... Orbiting scroll 32a ... End plate 32b ... Wrap 33 ... Compression chamber 34 ... Discharge hole 35 ... Rotating shaft 35a ... Eccentric shaft 40 ... Compression portion 41 ... First Rotating scroll 41a ... end plate 41b ... wrap 42 ... second rotating scroll 42a ... end plate 42b ... wrap 50 ... main body 51 ... fixed scroll 51a ... end plate 51b ... 52 ... Revolving scroll 52a ... End plate 52b ... Wrap 53c ... Boss 53 ... Rotating shaft 53a ... Eccentric shaft 60 ... Revolving motor 61 ... Magnet 62 ... Stator 70 ... Control part 90 ... Reverse rotation clutch 91 ... Roller 92 ... Cylindrical part 93 ... Gear 94 ... Coil spring

Claims (4)

A fixed scroll (31) having a spiral wrap (31b);
A orbiting scroll (32) having a spiral wrap (32b) meshing with the spiral wrap (31b) of the fixed scroll (31);
A motor (2) for driving the orbiting scroll (32) via a rotating shaft (35) ;
Formed between the wrap (31b) of the fixed scroll (31) and the wrap (32b) of the orbiting scroll (32) by revolving the orbiting scroll (32) without rotating by the motor (2). A scroll compressor that compresses the refrigerant by reducing the volume of the compression chamber (33) while moving the compression chamber (33) from the outside toward the center,
When the revolution of the orbiting scroll (32) is stopped, the orbiting scroll (32) is turned around the rotation shaft (35) with respect to the state of the orbiting scroll (32) that revolves without rotating during operation. A scroll compressor comprising an angle shift unit that rotates at a predetermined angle . The scroll compressor according to claim 1, wherein
The angle shift unit is
An Oldham support plate (9) for supporting an Oldham for revolving motion without rotating the orbiting scroll (32) and rotatably supported on the main body side;
An elastic member for urging the Oldham support plate (9) in a direction opposite to the revolution direction of the orbiting scroll (32);
When the orbiting scroll (32) orbits, the rotational force of the rotating shaft of the motor (2) is not transmitted to the Oldham support plate (9), and the orbiting scroll (32) orbits in the direction opposite to the orbiting direction. When the rotating shaft of the motor (2) rotates in the reverse direction, the transmission mechanism transmits the rotational force of the rotating shaft of the motor (2) to the Oldham support plate (9) against the biasing force of the elastic member. (90, 93). A first rotating scroll (41) having a spiral wrap (41b);
A second rotating scroll (42) having a spiral wrap (42b) meshing with the spiral wrap (41b) of the first scroll (41);
A first motor (2A) for driving the first rotary scroll (41);
A second motor (2B) for driving the second rotary scroll (42) in the same rotational direction as the first rotary scroll (41);
Rotating the first rotary scroll (41) and the second rotary scroll (42) with the rotation angle shifted by a predetermined angle by the first motor (2A) and the second motor (2B). Thus, the compression chamber (33) formed between the wrap (41b) of the first rotary scroll (41) and the wrap (42b) of the second rotary scroll (42) is directed from the outside toward the center. A scroll compressor that compresses the refrigerant by reducing the volume of the compression chamber (33) while being moved,
A controller (10) for controlling the first motor (2A) and the second motor (2B);
The control unit (10), said rotation when the stops of the first rotary scroll (41) and said second rotary scroll (42), rotating the upper Symbol first rotating scroll (41) to the second One of the first rotary scroll (41) and the second rotary scroll (42) is rotated in the direction of rotation with respect to the other from the state of rotation of the scroll (42) with the rotation angle shifted by a predetermined angle. A scroll compressor characterized in that the rotation angle of the first motor (2A) and the second motor (2B) is controlled so as to further deviate by a predetermined angle. A fixed scroll (51) having a spiral wrap (51b);
A orbiting scroll (52) having a spiral wrap (52b) meshing with the spiral wrap (51b) of the fixed scroll (51);
A rotating shaft (53) that supports the orbiting scroll (52) so that it can revolve;
A plurality of magnets (61) disposed at predetermined intervals in the circumferential direction on the outer peripheral side of the orbiting scroll (52), and the orbiting scroll (52) is rotated by the magnetic force applied to the plurality of magnets (61). A revolving motor (60) having a plurality of stators (62) for revolving without revolving;
A control unit (70) for controlling the revolving motor (60),
By revolving the orbiting scroll (52) without rotating by the revolution motor (60), the wrap (51b) of the fixed scroll (51) and the wrap (52b) of the orbiting scroll (52) are provided. A scroll compressor that compresses the refrigerant by reducing the volume of the compression chamber while moving the formed compression chamber from the outside toward the center,
When the revolution of the orbiting scroll (52) is stopped, the control unit (70) is arranged around the rotating shaft (53) with respect to the state of the orbiting scroll (52) that revolves without rotating during operation. A scroll compressor characterized in that the rotation angle of the revolution motor (60) is controlled so that the orbiting scroll (52) rotates by a predetermined angle in the orbiting direction .

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