JP2017133445A - Scroll compressor and air conditioner including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a scroll compressor adopting a scroll structure in consideration of the thermal expansion of scrolls for improving the engagement of lap parts of the fixed scroll and the movable scroll, thus reducing refrigerant leakage loss.SOLUTION: The scroll compressor includes a fixed scroll and a movable scroll 40. The movable scroll arranged to be revolvable in opposition to the fixed scroll has a spiral movable side lap part 42 erected on one face of a movable side plate part 41 for engaging with a fixed side lap part. A tooth tip part 43 of the movable side lap part has a tooth crest 46 which is inclined to be gradually lower as extending from an outer periphery side lateral face 44 to an inner periphery side lateral face 45 of the movable side lap part.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a scroll compressor and an air conditioner including the same.

  Conventionally, as shown in Patent Document 1 (International Publication No. 2014/155646), a fixed scroll and a movable scroll constituting a scroll compressor are formed between a tooth tip portion of a scroll lap portion and a tooth bottom portion facing the same. In order to reduce the leakage loss of the refrigerant due to the gaps formed, there is one in which a step that deepens from the outer peripheral side toward the inner peripheral side is formed at the bottom of the scroll.

  However, in the configuration in which a step is formed at the bottom of the scroll as in Patent Document 1, it cannot be said that sufficient consideration is given to the thermal expansion of the scroll during the operation of turning the movable scroll.

  For example, when a refrigerant, such as R32, whose discharge gas refrigerant temperature tends to be high is used, the movable scroll is greatly deformed in a convex shape toward the tooth bottom side of the fixed scroll due to thermal expansion under an operation condition of a high compression ratio. In addition, since the temperature rise during the compression stroke increases, the tendency of the elongation due to the thermal expansion of the tooth tip portion of the wrap portion to be larger in the portion closer to the inner peripheral side surface than the portion closer to the outer peripheral side surface of the wrap portion is prominent. Become. Due to the deformation of the scroll due to such thermal expansion, the meshing of the lap portion between the fixed scroll and the movable scroll becomes insufficient, which may increase the leakage loss of the refrigerant. On the other hand, even if a configuration in which a step is formed in the bottom portion of the scroll as in Patent Document 1, it is difficult to sufficiently reduce the leakage loss of the refrigerant due to the thermal expansion of the scroll.

  An object of the present invention is to adopt a scroll structure that takes into account the thermal expansion of the scroll during operation in a scroll compressor, improve the meshing of the lap portion between the fixed scroll and the movable scroll, and reduce the leakage of refrigerant It is to reduce.

  A scroll compressor according to a first aspect includes a fixed scroll and a movable scroll. In the fixed scroll, a spiral fixed side wrap portion is erected on one surface of the fixed side plate portion. The movable scroll is disposed so as to be able to turn facing the fixed scroll, and a spiral movable side wrap portion that is engaged with the fixed side wrap portion is provided on one surface of the movable side plate portion. And the tooth tip surface which inclines so that it may become low toward the inner peripheral side surface from the outer peripheral side surface of the movable side wrap portion is formed in the tooth tip portion of the movable side wrap portion. Here, the “tooth tip surface” is an end surface closest to the fixed side plate portion (tooth bottom portion) of the fixed scroll among the tooth tip portions of the movable side wrap portion. “Lower” and “tilt” are expressions using a plane perpendicular to the orbiting axis of the movable scroll as a reference plane.

  When the consideration for the thermal expansion of the scroll during operation is insufficient, the movable scroll is deformed in a convex shape toward the tooth bottom side of the fixed scroll, and the tooth tip portion of the movable side wrap portion is the movable side. The tooth tip surface of the movable side wrap portion extends from the inner peripheral side surface of the movable side wrap portion toward the outer peripheral side surface by extending largely at the portion closer to the inner peripheral side surface than the portion near the outer peripheral side surface of the wrap portion. The tendency to incline so that it becomes low appears.

  Therefore, here, in anticipation of the inclination tendency of the tooth tip surface of the movable wrap portion due to thermal expansion during operation, as described above, the tooth tip portion of the movable side wrap portion is moved from the outer peripheral side surface of the movable side wrap portion. An addendum surface inclined so as to become lower toward the inner peripheral side surface is formed.

  Thereby, here, it becomes possible to cancel the inclination tendency of the tooth tip surface of the movable side wrap portion due to thermal expansion during operation, improving the meshing of the wrap portion between the fixed scroll and the movable scroll, The leakage loss of the refrigerant can be reduced.

  A scroll compressor according to a second aspect is the scroll compressor according to the first aspect, wherein the inclination of the tooth tip surface is changed from the outer peripheral side surface of the movable side wrap portion to the inner peripheral side surface during the operation of turning the movable scroll. It is set so that it may approach the state which makes a flat surface over. Here, the “flat surface” is an expression in which a surface perpendicular to the turning axis of the movable scroll is used as a reference surface.

  Here, since the inclination tendency of the tooth tip surface can be canceled until the inclination of the tooth tip surface of the movable side wrap portion is almost eliminated during operation, the meshing of the wrap portion between the fixed scroll and the movable scroll is further improved. The leakage loss of the refrigerant can be greatly reduced.

  The scroll compressor concerning a 3rd viewpoint is the scroll compressor concerning the 1st or 2nd viewpoint. From the outer peripheral side surface of the fixed side wrap part to the inner peripheral side surface also in the tooth tip part of the fixed side wrap part. A tooth tip surface inclined so as to become lower is formed. Here, the tooth tip surface is an end surface closest to the movable side plate portion (tooth bottom portion) of the movable scroll among the tooth tip portions of the fixed side wrap portion.

  When the consideration for the thermal expansion of the scroll during operation is insufficient, the tooth tip portion of the fixed side wrap portion also extends greatly in the portion closer to the inner peripheral side surface than the portion close to the outer peripheral side surface of the fixed side wrap portion. By this, the tendency for the tooth tip surface of the fixed side wrap portion to incline so as to become lower from the inner peripheral side surface of the fixed side wrap portion toward the outer peripheral side surface appears.

  Therefore, here, in anticipation of the inclination tendency of the tooth tip surface of the fixed side wrap portion due to thermal expansion during operation, as described above, the outer side surface of the fixed side wrap portion is also applied to the tooth tip portion of the fixed side wrap portion. A tooth tip surface that is inclined so as to become lower toward the inner peripheral side surface is formed.

  Thereby, here, the inclination tendency of the tooth tip surface of the fixed side wrap portion due to thermal expansion during operation can be canceled, and the meshing of the wrap portion between the fixed scroll and the movable scroll is further improved. Further, the leakage loss of the refrigerant can be further reduced.

  The scroll compressor concerning the 4th viewpoint is used in order to compress the refrigerant containing R32.

  When a refrigerant that tends to increase the temperature of the discharge gas refrigerant as described above is used, the movable scroll is greatly deformed in a convex shape toward the bottom of the fixed scroll due to thermal expansion, and the temperature rise during the compression stroke increases. Therefore, the tendency that the elongation due to the thermal expansion of the tooth tip portion of the wrap portion becomes larger in the portion closer to the inner peripheral side surface than the portion close to the outer peripheral side surface of the wrap portion becomes remarkable.

  On the other hand, since the scroll compressor concerning any of the 1st-3rd viewpoint is employ | adopted as a scroll compressor here, the tooth-tip surface of the movable side lap | wrap part by the thermal expansion at the time of an operation | movement is adopted. The inclination tendency can be canceled, and the meshing of the lap portion between the fixed scroll and the movable scroll can be improved.

  An air conditioner according to a fifth aspect includes the scroll compressor according to any one of the first to fourth aspects.

  Here, the leakage loss of the refrigerant in the scroll compressor can be reduced, which contributes to the improvement of the air conditioning capability.

  As described in the above description, according to the present invention, the tooth tip portion of the wrap portion is formed with the tooth tip surface inclined so as to become lower from the outer peripheral side surface to the inner peripheral side surface of the wrap portion. The inclination tendency of the tooth tip surface of the lap portion due to thermal expansion during operation can be canceled, and the meshing of the lap portion between the fixed scroll and the movable scroll is improved, and the leakage loss of the refrigerant is reduced. be able to.

It is a schematic sectional drawing of the scroll compressor concerning one Embodiment of this invention. When the movable scroll concerning this invention is not employ | adopted, it is a figure which shows the state which the movable scroll deform | transformed convexly toward the stationary-side board part side by the thermal expansion at the time of a driving | operation. When the movable scroll concerning this invention is not employ | adopted, it is a figure which shows the state which the tooth-tip part of the movable side lap | wrap part extended by the thermal expansion at the time of a driving | operation. When the movable scroll concerning this invention is not employ | adopted, it is a figure which shows the state (state in which both convex deformation | transformation and elongation of the tooth tip part were united) which the movable scroll deform | transformed by the thermal expansion at the time of a driving | operation. It is sectional drawing which shows the detailed structure of the movable scroll concerning this invention. When the movable scroll concerning this invention is employ | adopted, it is a figure which shows the state (state in which both convex deformation | transformation and elongation of the tooth tip part were united) which the movable scroll deform | transformed by the thermal expansion at the time of a driving | operation. When the fixed scroll concerning the modification 1 is not employ | adopted, it is a figure which shows the state which the tooth-tip part of the fixed side lap | wrap part extended by the thermal expansion at the time of a driving | operation. It is sectional drawing which shows the detailed structure of the fixed scroll employ | adopted in the scroll compressor concerning the modification 1. It is sectional drawing which shows the detailed structure of the movable scroll employ | adopted in the scroll compressor concerning the modification 2. It is a schematic block diagram of the air conditioning apparatus which employ | adopted the scroll compressor concerning this invention.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a scroll compressor according to the present invention will be described with reference to the drawings. In addition, the specific structure of the scroll compressor concerning this invention is not restricted to the following embodiment and its modification, It can change in the range which does not deviate from the summary of invention.

(1) Basic Configuration and Operation FIG. 1 is a schematic cross-sectional view of a scroll compressor 1 according to an embodiment of the present invention.

  The scroll compressor 1 has a vertically long cylindrical hermetic dome-shaped casing 10. The casing 10 is a pressure vessel composed of a casing body 11, an upper wall portion 12, and a bottom wall portion 13, and the inside thereof is hollow. The casing main body 11 is a cylindrical trunk having an axis extending in the vertical direction. The upper wall portion 12 is an airtightly welded and integrally joined to the upper end portion of the casing body 11 and is a bowl-shaped portion having a convex surface protruding upward. The bottom wall portion 13 is a bowl-shaped portion having a convex surface protruding downward, which is welded and integrally joined to the lower end portion of the casing body 11 in an airtight manner.

  The casing 10 accommodates a compression mechanism 14 that compresses the refrigerant and a motor 15 that is disposed below the compression mechanism 14. The compression mechanism 14 and the motor 15 are connected by a drive shaft 16 that is disposed so as to extend in the vertical direction in the casing 10.

  The compression mechanism 14 includes a housing 20, a fixed scroll 30 disposed in close contact with the housing 20, and a movable scroll 40 that meshes with the fixed scroll 30. The housing 20 is press-fitted and fixed to the casing body 11 over the entire outer circumferential surface in the circumferential direction. That is, the casing body 11 and the housing 20 are in close contact with each other in an airtight manner over the entire circumference. The inside of the casing 10 is a high-pressure space that is filled with a high-pressure refrigerant after being compressed by the compression mechanism 14, and the scroll compressor 1 is a so-called high-pressure dome type compressor. The housing 20 is formed with a housing recess 21 recessed in the center of the upper surface and a bearing portion 22 extending downward from the center of the lower surface. The housing 20 is formed with a bearing hole 23 that penetrates the lower end surface of the bearing portion 22 and the bottom surface of the housing recess 21, and the drive shaft 16 is rotatably fitted in the bearing hole 23 via the bearing 24. ing.

  A suction pipe 17 is inserted into the upper wall portion 12 of the casing 10 in an airtight manner so that a low-pressure refrigerant flows into the casing 10 from the outside to the compression mechanism 14. Further, a discharge pipe 18 that discharges the high-pressure refrigerant in the casing 10 to the outside of the casing 10 is fitted in the casing body 11 in an airtight manner. The suction pipe 17 penetrates the upper wall portion 12 of the casing 10 in the vertical direction, and an inner end portion is fitted into the fixed scroll 30 of the compression mechanism 14. The discharge pipe 18 penetrates the casing main body 11 of the casing 10 in the lateral direction, and the inner end communicates with the high-pressure space in the casing 10.

  The lower end surface of the fixed scroll 30 is in close contact with the upper end surface of the housing 20. The fixed scroll 30 is fixed to the housing 20 with bolts or the like.

  The fixed scroll 30 mainly has a fixed side plate portion 31 and a fixed side wrap portion 32. The fixed side wrap portion 32 is a spiral (involute) portion erected on one surface (here, the lower surface) of the fixed side plate portion 31. The movable scroll 40 mainly has a movable side plate portion 41 and a movable side wrap portion 42. The movable side wrap portion 42 is a spiral (involute) portion that meshes with the fixed side wrap portion 32 erected on one surface (here, the upper surface) of the movable side plate portion 41. In addition, the movable scroll 40 is supported by the housing 20 via the Oldham ring 49, and the upper end of the drive shaft 16 is fitted therein so that the inside of the housing 20 can revolve without rotating due to the rotation of the drive shaft 16. Yes. The other surface (here, the lower surface) of the movable side plate portion 41 of the movable scroll 40 is pressed against the fixed scroll 30 by a high-pressure refrigerant that fills the space between the movable side plate portion 41 and the housing recess 21. A compression chamber 39 is formed between the fixed scroll 30 and the movable scroll 40 by engaging the fixed side wrap portion 32 of the fixed scroll 30 and the movable side wrap 42 of the movable scroll 40 with each other. The compression chamber 39 is configured to compress the refrigerant by the volume between the lap portions 32 and 42 contracting toward the center as the movable scroll 40 turns. Here, the fixed-side wrap portion 32 and the movable-side wrap portion 42 have an asymmetric scroll shape formed with a phase shifted by 180 degrees with respect to the rotation of the drive shaft 16.

  A discharge port 33 that communicates with the compression chamber 39 and an enlarged recess 34 that continues to the discharge port 33 are formed in the fixed side plate portion 31 of the fixed scroll 30. The discharge port 33 is a port for discharging the refrigerant after being compressed in the compression chamber 39, and is formed to extend in the vertical direction at the center of the fixed side plate portion 31. The enlarged recessed portion 34 is configured by a recessed portion that is recessed in the upper surface of the fixed side plate portion 31 and that extends in the horizontal direction. A chamber cover 35 is fixed to the upper surface of the fixed scroll 30 with a bolt or the like so as to close the enlarged recess 34. Then, the chamber cover 35 is covered with the enlarged concave portion 34, thereby forming a chamber chamber that is located above the discharge port 33 and into which the refrigerant flows from the compression chamber 39 through the discharge port 33. In addition, the fixed scroll 30 is formed with a suction port 36 through which the upper surface of the fixed scroll 30 and the compression chamber 39 communicate with each other and the suction pipe 17 is fitted. Further, the fixed scroll 30 and the housing 20 are formed with a communication channel (not shown) through which the refrigerant in the chamber chamber flows out into the high-pressure space.

  The motor 15 includes an annular stator 51 fixed to a wall surface in the casing 10, and a rotor 52 configured to be rotatable on the inner peripheral side of the stator 51. A winding is attached to the stator 51. The rotor 52 is drivably coupled to the movable scroll 40 of the compression mechanism 14 via a drive shaft 16 disposed at the axial center of the casing body 11 so as to extend in the vertical direction.

  In the lower space below the motor 15, lubricating oil is stored at the bottom, and a pump 60 is disposed. The pump 60 is fixed to the casing body 11 and attached to the lower end of the drive shaft 16 so as to pump up the stored lubricating oil. An oil supply passage 61 is formed in the drive shaft 16, and the lubricating oil pumped up by the pump 60 is supplied to each sliding portion through the oil supply passage 61.

  In the scroll compressor 1 having the basic configuration as described above, when the motor 15 is energized and driven, the rotor 52 rotates with respect to the stator 51, and thereby the drive shaft 16 rotates. When the drive shaft 16 rotates, an operation in which the movable scroll 40 turns with respect to the fixed scroll 30 is performed. Thus, the low-pressure refrigerant is sucked into the compression chamber 39 from the portion near the outer periphery of the compression chamber 39 through the suction pipe 17. The refrigerant sucked into the compression chamber 39 is compressed while being sent to a portion near the inner periphery of the compression chamber 39 as the volume of the compression chamber 39 changes. The high-pressure refrigerant compressed in the compression chamber 39 is sent to the high-pressure space in the casing 10 from the discharge port 33 at the center of the compression chamber 39 through the chamber chamber and the communication channel, and then through the discharge pipe 18. It is discharged out of the casing 10.

  During the operation of turning the movable scroll 40, thermal expansion of the scrolls 30 and 40 occurs. For example, when a refrigerant such as R32 whose discharge gas refrigerant temperature is likely to be high is used, the fixed scroll plate 31 of the fixed scroll 30 is caused by thermal expansion of the movable scroll 40 as shown in FIG. Large deformation in a convex shape toward the (tooth bottom) side. Further, since the temperature rise during the compression stroke becomes large, as shown in FIG. 3, the elongation due to the thermal expansion of the tooth tip portion 43 of the movable side wrap portion 42 is larger than the portion near the outer peripheral side surface 44 of the movable side wrap portion 42. Also, the tendency to become large near the inner peripheral side surface 45 becomes remarkable. As a result, during the operation of turning the movable scroll 40, as shown in FIG. 4, the movable scroll 40 is deformed with the two thermal expansions combined. Then, due to the deformation of the movable scroll 40 due to such thermal expansion, the lap portions 32 and 42 between the fixed scroll 30 and the movable scroll 40 are not sufficiently engaged, and the refrigerant leakage loss may increase. 2 to 4, for convenience of explanation, the deformation due to thermal expansion is shown to be considerably larger than the actual amount.

  On the other hand, the scroll compressor 1 employs a scroll structure that takes into account the thermal expansion of the scrolls 30 and 40 during operation, as will be described later.

(2) Detailed structure and characteristics of movable scroll Next, the detailed structure of the movable scroll 40 in consideration of thermal expansion during operation will be described with reference to FIGS. Here, FIG. 5 is a sectional view showing a detailed structure of the movable scroll 40 according to the present invention. FIG. 6 shows a state in which the movable scroll 40 is deformed by thermal expansion during operation (a state in which both the convex deformation and the extension of the tooth tip portion 43 are combined) when the movable scroll 40 according to the present invention is employed. FIG.

  As described above, when the consideration for the thermal expansion of the scrolls 30 and 40 during operation is insufficient, the movable scroll 40 is deformed in a convex shape toward the fixed side plate portion 31 (tooth bottom portion) side of the fixed scroll 30. In addition, the tooth tip portion 43 of the movable side wrap portion 42 extends greatly at a portion closer to the inner peripheral side surface 45 than a portion near the outer peripheral side surface 44 of the movable side wrap portion 42. As a result, as shown in FIG. 4, the tooth tip surface 46 of the movable side wrap portion 42 tends to be inclined so as to become lower from the inner peripheral side surface 45 to the outer peripheral side surface 44 ( (Refer to the alternate long and short dash line attached to extend the tooth tip surface 46 in FIG. 4). Here, the tooth tip surface 46 is the end surface closest to the fixed side plate portion 31 (tooth bottom portion) of the fixed scroll 30 among the tooth tip portions 43 of the movable side wrap portion 42 (in FIG. 4 and the like, the upper end side of the movable scroll 40). End face). Moreover, the expression regarding the structure / shape such as “lowering” or “inclining” is an expression with reference to the plane A perpendicular to the turning axis O of the movable scroll 40, and “lowering” with respect to the plane A. ”Or“ inclined ”with respect to plane A.

  Therefore, here, as shown in FIG. 5, in consideration of the inclination tendency of the tooth tip surface 46 of the movable side wrap portion 42 due to thermal expansion during operation, the movable side wrap is placed on the tooth tip portion 43 of the movable side wrap portion 42. 5 is formed so as to be inclined downward from the outer peripheral side surface 44 to the inner peripheral side surface 45 of the portion 42 (one point attached so as to extend the tooth front surface 46 in FIG. 5). See chain line). Here, the expressions relating to the structure and shape of “lower” and “inclined” are based on a plane A perpendicular to the turning axis O of the movable scroll 40 as in FIG. 4 (FIG. 5). reference). FIG. 5 shows a shape in a state where the operation for turning the movable scroll 40 is not performed, that is, in a state where the thermal expansion of the scrolls 30 and 40 during the operation is not generated.

  Thereby, as shown in FIG. 6, it becomes possible to cancel the inclination tendency of the tooth tip surface 46 of the movable side wrap portion 42 due to thermal expansion during operation, and the fixed scroll 30 and the movable scroll 40 It is possible to improve the meshing of the wrap portions 32 and 42 between them and reduce the leakage loss of the refrigerant.

  In particular, here, the inclination of the tooth tip surface 46 is set so as to approach a state of forming a flat surface from the outer peripheral side surface 44 to the inner peripheral side surface 45 of the movable side wrap portion 42 during the operation of turning the movable scroll 40. (Refer to the alternate long and short dash line attached to extend the tooth tip surface 46 in FIG. 6). Here, the “flat surface” is an expression in which the surface A perpendicular to the turning axis O of the movable scroll 40 is used as a reference surface, as in FIGS. 4 and 5, and “the surface parallel to the surface A”. Means. (See FIG. 6).

  Thereby, since the inclination tendency of the tooth tip surface 46 can be canceled until the inclination of the tooth tip surface 46 of the movable side wrap portion 42 is almost eliminated during operation, the wrap between the fixed scroll 30 and the movable scroll 40 is here. The meshing of the portions 32 and 42 can be further improved, and the leakage loss of the refrigerant can be greatly reduced.

(3) Modification 1
In the above embodiment, the movable scroll 40 has a structure that takes into account thermal expansion during operation. However, thermal expansion also occurs in the fixed scroll 30 during operation. Specifically, as shown in FIG. 7, the tooth tip portion 33 of the fixed side wrap portion 32 also extends greatly in the portion closer to the inner peripheral side surface 35 than the portion close to the outer peripheral side surface 34 of the fixed side wrap portion 32. Thus, the tooth tip surface 36 of the fixed side wrap portion 32 tends to be inclined so as to become lower from the inner peripheral side surface 35 to the outer peripheral side surface 34 of the fixed side wrap portion 32 (the tooth tip surface 36 in FIG. (See alternate long and short dash lines) Here, the tooth tip surface 36 is the end surface closest to the movable side plate portion 41 (tooth bottom portion) of the movable scroll 40 in the tooth tip portion 33 of the fixed side wrap portion 32 (in FIG. 7 and the like, the lower end side of the fixed scroll 30). End face). Moreover, the expression regarding the structure / shape such as “lowering” or “inclining” is an expression with reference to the plane A perpendicular to the turning axis O of the movable scroll 40, and “lowering” with respect to the plane A. ”Or“ inclined ”with respect to plane A.

  Therefore, here, as shown in FIG. 8, in consideration of the inclination tendency of the tooth tip surface 36 of the fixed side wrap portion 32 due to thermal expansion during operation, the tooth tip portion 33 of the fixed side wrap portion 32 is also fixed on the fixed side. An addendum surface 36 that is inclined so as to be lowered from the outer peripheral side surface 34 to the inner peripheral side surface 35 of the wrap portion 32 is formed (the addendum surface 36 in FIG. 8 is attached so as to extend). (See dashed-dotted line). Here, the expressions relating to the structure and shape of “lower” and “inclined” are based on a plane A perpendicular to the turning axis O of the movable scroll 40 as in FIG. 7 (FIG. 8). reference). Further, FIG. 8 shows a shape in a state where the operation for turning the movable scroll 40 is not performed, that is, in a state where the thermal expansion of the scrolls 30 and 40 during the operation is not generated.

  Thereby, like the movable scroll 40, the inclination tendency of the tooth tip surface 36 of the fixed side wrap portion 32 due to thermal expansion during operation can be canceled, and the fixed scroll 30 and the movable scroll 40 can be canceled. It is possible to further improve the meshing of the wrap portions 32 and 42 between them and further reduce the leakage loss of the refrigerant.

  Also in the fixed scroll 30, as in the case of the movable scroll 40, the inclination of the tooth tip surface 36 is flat from the outer peripheral side surface 34 to the inner peripheral side surface 35 of the fixed side wrap portion 32 during the operation of turning the movable scroll 40. You may set so that it may approach the state which makes a smooth surface.

(4) Modification 2
In the said embodiment and the modification 1, as shown in FIG. 9, you may form so that the tooth height of the movable side wrap part 42 of the movable scroll 40 may become low toward an inner peripheral side from an outer peripheral side. Here, FIG. 9 shows a shape in a state where the operation of turning the movable scroll 40 is not performed, that is, in a state where the thermal expansion of the scrolls 30 and 40 during the operation is not generated.

  Thereby, it becomes possible to further cancel the convex deformation of the movable scroll 40 toward the fixed side plate 31 (tooth bottom) side of the fixed scroll 30 during operation. It is possible to further improve the meshing of the wrap portions 32 and 42 between them and further reduce the leakage loss of the refrigerant.

(5) Example adopted in an air conditioner having a refrigerant circuit in which a refrigerant containing R32 is enclosed And the scroll compressor 1 of the embodiment and the first and second modifications is, for example, a refrigerant circuit as shown in FIG. The air conditioner 100 having 101 is employed. Here, the refrigerant circuit 101 is configured by sequentially connecting a scroll compressor 1 that compresses the refrigerant, a radiator 102 that radiates the refrigerant, an expansion mechanism 103 that decompresses the refrigerant, and an evaporator 104 that evaporates the refrigerant. Has been. The refrigerant circuit 101 contains a refrigerant containing R32.

  For this reason, here, due to the use of the refrigerant containing R32, the temperature of the discharged gas refrigerant is likely to be high, the movable scroll 40 becomes larger in a convex shape toward the tooth bottom side of the fixed scroll 30 due to thermal expansion. Further, since the temperature rise during the compression stroke is increased, the elongation due to the thermal expansion of the tooth tip portion 43 of the wrap portion 42 is closer to the inner peripheral side surface 45 than the portion closer to the outer peripheral side surface 44 of the wrap portion 42. The tendency to become large in the part is remarkable.

  On the other hand, since the scroll compressor 1 which considered the thermal expansion of the scroll 40 at the time of operation | movement is employ | adopted here as the scroll compressor 1 like the said embodiment and the modifications 1 and 2, driving | operation The inclination tendency of the tooth tip surface 46 of the movable side wrap portion 42 due to thermal expansion at the time can be canceled, and the meshing of the lap portions 32 and 42 between the fixed scroll 30 and the movable scroll 40 can be improved. It can be done. And since the leakage loss of the refrigerant | coolant in the scroll compressor 1 can be reduced by this, it contributes also to the improvement of the air-conditioning capability of the air conditioning apparatus 100.

  The present invention is widely applicable to a scroll compressor and an air conditioner including the scroll compressor.

DESCRIPTION OF SYMBOLS 1 Scroll compressor 30 Fixed scroll 31 Fixed side plate part 32 Fixed side wrap part 33 Tooth tip part 34 Outer peripheral side surface 35 Inner peripheral side surface 36 Tooth tip surface 40 Movable scroll 41 Movable side plate part 42 Movable side wrap part 43 Tooth tip part 44 Outer peripheral side surface 45 Inner peripheral side surface 46 Tooth tip surface 100 Air conditioner

International Publication No. 2014/155646

Claims (5)

A fixed scroll (30) in which a spiral fixed side wrap portion (32) is erected on one surface of the fixed side plate portion (31);
A swirl-shaped movable side wrap portion (42) is disposed upright on one surface of the movable side plate portion (41) and meshes with the fixed side wrap portion (32). A movable scroll (40),
With
The tooth tip portion (43) of the movable side wrap portion (42) is inclined so as to become lower from the outer peripheral side surface (44) to the inner peripheral side surface (45) of the movable side wrap portion (42). A tooth tip surface (46) is formed,
Scroll compressor (1). The inclination of the tooth tip surface (46) is a flat surface extending from the outer peripheral side surface (44) to the inner peripheral side surface (45) of the movable side wrap portion (42) during the operation of turning the movable scroll (40). Set to approach the
The scroll compressor (1) according to claim 1. The tooth tip portion (33) of the fixed side wrap portion (32) is also inclined so as to become lower from the outer peripheral side surface (34) to the inner peripheral side surface (35) of the fixed side wrap portion (32). A tooth tip surface (36) is formed,
The scroll compressor (1) according to claim 1 or 2. Used to compress refrigerant containing R32,
The scroll compressor (1) according to any one of claims 1 to 3. The scroll compressor (1) according to any one of claims 1 to 4,
An air conditioner (100) comprising:

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