Scroll compressor

Abstract

A scroll compressor includes a housing, a main frame provided inside the housing, a rotating shaft supported at the main frame, an orbiting scroll supported at the main frame in conjunction with the rotating shaft, a fixed scroll fixed to the main frame to form a compression chamber by engaging with the orbiting scroll, and a cross ring slidably coupled to the orbiting scroll to prevent rotation of the orbiting scroll. The cross ring includes a ring body formed in a ring shape, provided between the main frame and the orbiting scroll, and supported in an axial direction of the rotating shaft, and a key portion extending in an axial direction from the ring body to be slidably inserted into a key receiving portion provided at the orbiting scroll, the main frame, or the fixed scroll. An oil supply passage is provided at the ring body or the key portion to guide oil accumulated on a member supporting the ring body toward between the key portion and the key receiving portion.

Description

TECHNICAL FIELD

[0001] The present application relates to a scroll compressor, and more particularly, to a scroll compressor having a structure capable of more actively and directly supplying oil to a key of an Oldham ring. BACKGROUND

[0002] In a scroll compressor, a revolving scroll and a non-revolving scroll are combined by engaging with each other, and two pairs of compression chambers are formed during the revolving motion of the revolving scroll relative to the non-revolving scroll.

[0003] The compression chambers are composed of suction compression chambers formed in the outer profile, intermediate compression chambers continuously formed from the suction compression chambers toward the center portion with a gradually reduced volume, and discharge compression chambers continuously formed on the center side of the intermediate compression chambers. In general, the suction compression chambers are formed through the side surface of the non-revolving scroll, the intermediate compression chambers are sealed, and the discharge compression chambers are formed through the end plate portion of the non-revolving scroll.

[0004] The scroll compressor can be classified into a low-pressure type and a high-pressure type according to the path of the suction refrigerant. The low-pressure type adopts a method in which a refrigerant suction pipe is communicated with the inner space of a housing, and the low-temperature suction refrigerant is guided to the suction compression chambers after passing through the inner space of the housing, and the high-pressure type adopts a method in which the refrigerant suction pipe is directly connected to the suction compression chambers, so that the refrigerant is directly guided to the suction compression chambers without passing through the inner space of the housing.

[0005] On the other hand, in the scroll compressor, a self-rotation preventing member can be provided, which prevents a scroll (for example, a revolving scroll) that receives a rotational force of a driving motor from rotating with respect to another scroll (for example, a fixed scroll) or a fixed frame that faces the scroll.

[0006] As the self-rotation preventing member, there are an Oldham ring or a pin & ring. The Oldham ring is advantageous in assembly compared to the pin & ring. In recent years, there is introduced a technology of forming a ring body and a key that constitute the Oldham ring by different materials, thereby not only securing a required rigidity but also making the Oldham ring light in weight.

[0007] The Oldham ring part of the compressor is a part that prevents the self-rotation of the revolving scroll, and generally has a structure in which the key of the Oldham ring is in contact with and rotates with the grooves of the revolving scroll and the main frame.

[0008] On the other hand, in order to lubricate the contact portion of the Oldham ring, it is necessary to supply oil of the intermediate pressure space of the main frame to the contact surface of the key. In order to improve the actual load efficiency of the air conditioner, it is necessary to expand the operation region to the low pressure ratio region, but the oil supply amount to the intermediate pressure space of the main frame will be reduced due to the reduction in the oil supply amount based on the pressure difference.

[0009] Patent Document 1 (Korean Laid-open Patent Publication 10-2005-0043485) discloses a cross ring oil supply structure of a scroll compressor that prevents wear of a cross ring by directly guiding oil to a sliding portion of the cross ring and a main frame, thereby being able to prevent a decrease in efficiency of the compressor in advance.

[0010] In addition, Patent Document 2 (U.S. Patent Application Publication 2013 / 0164164) discloses a structure that stores oil by generating grooves on both sides of a key coupling groove of a main frame. In addition, a structure that forms a space capable of storing oil by generating grooves on both sides of a cross ring key is disclosed.

[0011] In Patent Document 2, if the key groove of the main frame is located on the lower side of the compressor, oil storage is facilitated. In addition, the effect can be produced in the case of a horizontal compressor.

[0012] However, in the scroll compressor of the upper compression structure that the applicant is developing, since the key groove of the orbiting scroll is located on the opposite side of the oil flow direction, it is a structure that is not good for lubrication. In addition, the amount of oil in the intermediate pressure space where the key groove of the cross ring is located is not sufficient to operate in a low pressure ratio region.

[0013] Therefore, for the existing cross ring structure, a structure that is able to more actively and directly supply oil to the key of the cross ring needs to be developed. SUMMARY

[0014] The present application is proposed to solve the above problems, and a first object of the present application is to provide a scroll compressor having a structure that is able to more actively and directly supply oil to the key of the cross ring.

[0015] In addition, a second object of the present application is to provide a scroll compressor having a structure that can form a flow path capable of supplying oil from below to above in the moving direction since it is not easy to supply oil to the key portion of the orbiting scroll in the case where the amount of oil stored in the cross ring space of the main frame is small.

[0016] In addition, a third object of the present application is to provide a scroll compressor having a structure that is able to solve the problem of insufficient oil in the intermediate pressure space where the key groove of the existing cross ring is located by simply adding machining to the cross ring without adding additional components.

[0017] In addition, a fourth object of the present application is to make the supply of oil to the cross ring more active, and to increase the number of portions in contact with oil among the respective surfaces of the orbiting key that are in contact with the inner circumferential surface of the orbiting key groove, thereby being able to improve reliability.

[0018] In addition, a fifth object of the present application is to provide a structure for improving oil supply to a key portion of a cross ring, so that it can be applied not only to a scroll compressor of an upper compression structure but also to a scroll compressor of a lower compression structure, in order to improve oil supply at a low pressure ratio.

[0019] In addition, a sixth object of the present application is to provide a structure for improving oil supply to a key portion of a cross ring, so that it can be applied not only to a bidirectional cross ring in which key portions are formed on both a top surface and a bottom surface of the cross ring but also to a unidirectional cross ring in which key portions are formed on only a top surface of the cross ring, in order to improve oil supply at a low pressure ratio.

[0020] To solve the above problems, a scroll compressor according to the present application includes a housing, a main frame provided inside the housing, a rotating shaft supported by the main frame, an orbiting scroll coupled to the rotating shaft and supported by the main frame, a fixed scroll fixed to the main frame and forming a compression chamber by engaging with the orbiting scroll, and a cross ring slidably coupled to the orbiting scroll to prevent rotation of the orbiting scroll, the cross ring including a ring body formed in a ring shape, provided between the main frame and the orbiting scroll, and supported in an axial direction of the rotating shaft, and a key portion extending in the axial direction from the ring body and slidably inserted into a key receiving portion provided in the orbiting scroll, the main frame, or the fixed scroll, an oil supply passage being provided in at least one of the ring body or the key portion to guide oil accumulated on a member supporting the ring body toward between the key portion and the key receiving portion.

[0021] Accordingly, the scroll compressor according to the present application can supply oil more smoothly to the key portion as the cross ring moves, thereby improving reliability.

[0022] According to an example related to the present application, the oil supply passage is an oil supply groove formed in at least one side surface of the key portion or at least one side surface of the key receiving portion facing the key portion.

[0023] The oil supply groove can be formed in at least one of an outer side surface formed in a circumferential direction of the key portion and an inner side surface formed in a circumferential direction of the key portion.

[0024] In addition, the oil supply groove can be provided in both side surfaces of the key portion, the both side surfaces being provided between the outer side surface formed in a circumferential direction of the key portion and the inner side surface formed in a circumferential direction of the key portion.

[0025] Such a structure can be a structure that facilitates upward movement of oil accumulated in an inner periphery and an outer periphery of the cross ring within the cross ring through the oil supply groove.

[0026] The oil supply groove can be formed in each of the two side surfaces as a plurality of oil supply grooves crossing each other.

[0027] Preferably, in the rotational direction of the rotational shaft, the oil supply groove of the side surface disposed in front in the rotational direction of the rotational shaft can have a larger number or a wider width than the oil supply groove of the side surface disposed in back in the rotational direction of the rotational shaft.

[0028] Thus, the side surface of the scroll key disposed in front in the rotational direction of the rotational shaft will flow relatively more oil, so that a structure more favorable to oil supply can be obtained.

[0029] The oil supply groove can be formed obliquely, with the outer peripheral side of the cross ring being a lower end of the oil supply groove and the inner peripheral side of the cross ring being an upper end of the oil supply groove.

[0030] Thus, as oil is guided to the top surface of the ring body, oil supply to the oblique groove formed in the up-and-down direction in the inner peripheral side of the scroll key groove of the scroll orbiting plate becomes more active, and the portion of each surface of the scroll key in contact with the oil in contact with the inner peripheral side of the scroll key groove will increase, so that reliability can be improved.

[0031] The oil supply groove can be formed in each of the two side surfaces as a plurality of oil supply grooves crossing each other.

[0032] The oil supply groove can be formed only in the inner side surface of the key portion formed in the circumferential direction.

[0033] The oil supply groove can be formed parallel to the extension direction of the rotational shaft.

[0034] The oil supply groove can also be formed in the radial direction.

[0035] With the structure in which the oil supply groove is formed in the radial direction, a structure in which oil is retained in the key portion of the cross ring in a case where oil is caused to flow in the upward direction can be obtained.

[0036] Preferably, the oil supply groove can be formed in at least one side surface of the key accommodating portion, and the oil supply groove can be formed obliquely, with the outer peripheral side of the cross ring being a lower end of the oil supply groove and the inner peripheral side of the cross ring being an upper end of the oil supply groove.

[0037] Thus, as oil is guided to the top surface of the ring body, oil supply to the oblique groove formed in the up-and-down direction in the inner peripheral side of the scroll key groove of the scroll orbiting plate becomes more active, and the portion of each surface of the scroll key in contact with the oil in contact with the inner peripheral side of the scroll key groove will increase, so that reliability can be improved.

[0038] The oil supply groove can be formed in at least one side surface of the key accommodating portion, and the oil supply groove can be formed in the radial direction.

[0039] By the structure in which the oil supply groove is formed in the radial direction, it is possible to provide a structure in which oil is held in the key portion of the cross in a state in which oil flows upward.

[0040] According to another example related to the present application, the oil supply passage can be an oil supply hole formed through a face of the ring body connected to one of the two side faces of the key portion.

[0041] The oil supply hole can be formed through two faces of the ring body connected to the two side faces of the key portion, respectively.

[0042] The oil supply holes formed in the two side faces of the key portion, respectively, can have diameters that are the same as each other.

[0043] In addition, in the rotational direction of the rotational shaft, the diameter of the oil supply hole disposed on the front side can be larger than the diameter of the oil supply hole disposed on the rear side.

[0044] Thus, in the rotational direction of the rotational shaft, relatively more oil flows on the side face of the spiral key disposed on the front side, and thus it is possible to provide a structure that is more advantageous for oil supply.

[0045] The oil supply hole can be formed only in one of the two side faces of the key portion, and the oil supply hole can be formed through a face connected to the side face of the key portion disposed on the front side in the rotational direction of the rotational shaft.

[0046] The oil supply hole can be formed obliquely in the circumferential direction.

[0047] The oil supply hole can be formed obliquely in the radial direction.

[0048] According to still another example related to the present application, the oil supply passage can be an oil supply face portion protruding in the radial direction from at least one of the inner and outer peripheries of the ring body and having an inclined face.

[0049] In addition, between the outer side face of the key portion formed in the circumferential direction and the inner side face of the key portion formed in the circumferential direction, the two side faces can be provided with an oil supply groove, the key portion is provided with a protruding side portion protruding in the radial direction from at least one of the outer and inner peripheries of the ring body and connected to the oil supply face portion, and the lower end of the oil supply groove is connected to the upper portion of the inclined face.

[0050] Thus, oil rising along the inclined face of the oil supply face portion can be more facilitated to rise to the upper portion of the spiral key by the oil supply groove extending to the protruding side portion.

[0051] Further, by having the oil supply surface portion with the inclined surface, oil contained in the cross ring accommodating portion of the main frame can flow from the lower portion of the cross ring in the outer periphery of the ring body in the upward direction of the inclined surface, thereby being able to guide the oil to the top surface of the ring body.

[0052] In the upper compression type scroll compressor of the present application, the orbiting scroll and the fixed scroll can be provided at the upper portion of the housing, the main frame is disposed at opposite sides of the orbiting scroll with the cross ring interposed therebetween, the key accommodating portion includes an orbiting key accommodating portion formed on one face of the orbiting scroll and a main key accommodating portion formed on one face of the main frame, and the key portion includes an orbiting key slidably inserted into the orbiting key accommodating portion on the top surface of the ring body and a main key slidably inserted into the main key accommodating portion on the bottom surface of the ring body.

[0053] In the lower compression type scroll compressor of the present application, the orbiting scroll and the fixed scroll can be provided at the lower portion of the rotary shaft, the main frame is disposed on the top surface of the orbiting scroll, the main frame is disposed at opposite sides of the orbiting scroll with the cross ring interposed therebetween, the key accommodating portion includes a main key accommodating portion formed on one face of the main frame and an orbiting key accommodating portion formed on one face of the orbiting scroll, and the key portion includes a main key slidably inserted into the main key accommodating portion on the top surface of the ring body and an orbiting key slidably inserted into the orbiting key accommodating portion on the bottom surface of the ring body.

[0054] In the upper compression type scroll compressor of the present application, the orbiting scroll and the fixed scroll can be provided at the upper portion of the housing, the main frame is disposed at opposite sides of the orbiting scroll with the cross ring interposed therebetween, the key accommodating portion includes an orbiting key accommodating portion formed on one face of the orbiting scroll and a main key accommodating portion formed on one face of the main frame, and the key portion includes an orbiting key slidably inserted into the orbiting key accommodating portion on the top surface of the ring body and a main key slidably inserted into the main key accommodating portion on the bottom surface of the ring body. BRIEF DESCRIPTION OF DRAWINGS

[0055] FIG. 1 is a sectional view showing the upper compression type scroll compressor of the present application.

[0056] FIG. 2 is an exploded perspective view showing the compression portion of FIG. 1 .

[0057] FIG. 3 is an exploded perspective view showing an example in which the cross ring is provided to the main frame.

[0058] FIG. 4 is a cross-sectional view showing a portion of the compression section of FIG. 1 in which a cross ring is provided, enlarged and shown.

[0059] FIG. 5 is a conceptual view showing an example in which a cross ring is provided between a main frame and a scroll wrap, and oil is supplied to an upper portion of the main frame.

[0060] FIG. 6 is a plan view showing an example in which a cross ring is provided in a cross ring accommodating portion of a main frame.

[0061] FIG. 7 is an exploded perspective view showing a main frame and a cross ring.

[0062] FIG. 8 is an exploded perspective view showing a scroll wrap and a cross ring.

[0063] FIG. 9A is a perspective view showing a cross ring of the first embodiment.

[0064] FIG. 9B is another example of the cross ring of the first embodiment, which is a perspective view showing that oil supply grooves are formed on the inner and outer circumferential sides.

[0065] FIG. 9C is another example of the cross ring of the first embodiment, which is a perspective view showing that oil supply grooves of different numbers and widths are formed on both side surfaces.

[0066] FIG. 9D is another example of the cross ring of the first embodiment, which is a perspective view showing that oil supply grooves cross each other along diagonal lines are formed on both side surfaces.

[0067] FIG. 9E is another example of the cross ring of the first embodiment, which is a perspective view showing that oil supply grooves cross each other along the radial and axial directions are formed on both side surfaces.

[0068] FIG. 10A is a perspective view showing a cross ring of the second embodiment.

[0069] FIG. 10B is a perspective view showing another example of the cross ring of the second embodiment.

[0070] FIG. 10C is a perspective view showing still another example of the cross ring of the second embodiment.

[0071] FIG. 11 is a perspective view showing a cross ring of the third embodiment.

[0072] FIG. 12A is a perspective view showing a cross ring of the fourth embodiment.

[0073] FIG. 12B is a perspective view showing the bottom surface of the orbiting scroll provided with the cross ring of the fourth embodiment.

[0074] FIG. 12C is a perspective view showing the bottom surface of the orbiting scroll provided with another example of the cross ring of the fourth embodiment.

[0075] FIG. 13 is a sectional view showing an example in which the ring bodies of the cross rings on the left and right sides of the orbiting key are respectively formed with oil supply holes.

[0076] FIG. 14 is a sectional view showing the lower compression type scroll compressor 200 of the present application.

[0077] FIG. 15 is an exploded perspective view showing the main frame, the cross ring, and the orbiting scroll of FIG. 14

[0078] FIG. 16 is a plan view showing the cross ring disposed in the cross ring accommodating portion of the orbiting scroll and the main frame.

[0079] FIG. 17 is a sectional view showing the portion in which the cross ring is provided in the compression portion of FIG. 14

[0080] FIG. 18 is a sectional view showing the cross ring disposed between the main frame and the orbiting scroll.

[0081] FIG. 19 is an exploded perspective view showing the orbiting scroll and the cross ring.

[0082] FIG. 20 is an exploded perspective view showing the main frame and the cross ring.

[0083] FIG. 21A is a perspective view showing the cross ring of the fifth embodiment.

[0084] FIG. 21B is another example of the cross ring of the fifth embodiment, which is a perspective view showing an example in which oil supply grooves are formed on the inner and outer circumferential sides.

[0085] FIG. 21C is another example of the cross ring of the fifth embodiment, which is a perspective view showing an example in which oil supply grooves of different numbers and widths are formed on both side surfaces.

[0086] FIG. 21D is another example of the cross ring of the fifth embodiment, which is a perspective view showing an example in which oil supply grooves cross each other along diagonals on both side surfaces.

[0087] FIG. 21E ​​is another example of the cross ring of the fifth embodiment, which is a perspective view showing oil supply grooves intersecting each other in the radial and axial directions at both side surfaces.

[0088] FIG. 22A is a perspective view showing the cross ring of the sixth embodiment.

[0089] FIG. 22B is another example of the cross ring of the sixth embodiment, which is a perspective view.

[0090] FIG. 22C is still another example of the cross ring of the sixth embodiment, which is a perspective view.

[0091] FIG. 23 is a perspective view showing the cross ring of the seventh embodiment.

[0092] FIG. 24A is a perspective view showing the cross ring of the eighth embodiment.

[0093] FIG. 24B is a perspective view showing the bottom surface of the main frame to which the cross ring of the eighth embodiment is provided.

[0094] FIG. 24C is a perspective view showing the bottom surface of the orbit scroll to which another example of the cross ring of the eighth embodiment is provided.

[0095] FIG. 25 is a sectional view showing an example in which oil supply holes are formed at the left and right sides of the orbit key in the ring body of the cross ring, respectively.

[0096] FIG. 26 is an exploded perspective view showing the main frame, the cross ring, the orbit scroll, and the fixed scroll of the scroll compressor including the upper compression type one-way cross ring.

[0097] FIG. 27 is an exploded perspective view showing the orbit scroll, the fixed scroll, and the cross ring of FIG. 26

[0098] FIG. 28A is a perspective view showing the cross ring of the ninth embodiment.

[0099] FIG. 28B is another example of the cross ring of the ninth embodiment, which is a perspective view showing an example in which oil supply grooves are formed at the inner and outer peripheral sides.

[0100] FIG. 28C is another example of the cross ring of the ninth embodiment, which is a perspective view showing oil supply grooves having different numbers and widths formed at both side surfaces.

[0101] FIG. 28D ​is another example of the cross ring of the ninth embodiment, which is a perspective view showing oil supply grooves intersecting each other in the radial and axial directions at both side surfaces.

[0102] FIG. 28E is another example of the cross ring of the ninth embodiment, which is a perspective view showing oil supply grooves intersecting each other in the radial and axial directions at both side surfaces.

[0103] FIG. 29A is a perspective view showing the cross ring of the tenth embodiment.

[0104] FIG. 29B is another example of the cross ring of the tenth embodiment.

[0105] FIG. 29C is still another example of the cross ring of the tenth embodiment.

[0106] FIG. 30 is a perspective view showing the cross ring of the eleventh embodiment.

[0107] FIG. 31A is a perspective view showing the cross ring of the twelfth embodiment.

[0108] FIG. 31B is a perspective view showing the bottom surface of the main frame provided with the cross ring of the twelfth embodiment.

[0109] FIG. 31C is a perspective view showing the bottom surface of the orbit scroll of another example of the cross ring of the twelfth embodiment. DETAILED DESCRIPTION

[0110] Hereinafter, the scroll compressor 100, 200 of the present application will be described in detail with reference to the accompanying drawings.

[0111] In the present specification, even if the embodiments are different from each other, the same or similar reference numerals are assigned to the same or similar structural elements, and repeated description thereof is omitted.

[0112] In addition, even if the embodiments are different from each other, as long as there is no contradiction in structure and function, the structure applied to one embodiment can be equally applied to another embodiment.

[0113] Unless the context clearly indicates otherwise, the singular expression includes the plural expression.

[0114] In explaining the present application, when it is judged that specific description of related known technology will confuse the gist of the present application, detailed description thereof is omitted.

[0115] The accompanying drawings are provided to facilitate understanding of embodiments disclosed in the specification, and the technical idea disclosed in the specification is not limited to the drawings, and the present application includes all modifications, equivalents, and alternatives within the technical idea and technical scope of the present application.

[0116] The present application provides a scroll compressor 100, 200, 300 provided with a cross ring 170 having a structure capable of more actively and directly supplying oil to a key of the cross ring 170, and can be applied to an upper compression type scroll compressor 100, 300 and a lower compression type scroll compressor 200.

[0117] Hereinafter, in the scroll compressor 100, 200, 300 of the present application, first, an upper compression type scroll compressor 100 in which a compression part is disposed at an upper portion of a driving motor 120 and a key part of a cross ring 170 is formed at a top surface and a bottom surface will be described.

[0118] FIG. 1 FIG. 1 is a cross-sectional view illustrating an upper compression type scroll compressor 100 of the present application, FIG. 2 FIG. 2 is an exploded perspective view illustrating a compression part of FIG. 1 FIG. 3 is an exploded perspective view illustrating an example in which a cross ring 170 is disposed in a main frame 130 of FIG. 3 FIG. 4 is a cross-sectional view illustrating a portion in which the cross ring 170 is disposed in a compression part of FIG. 4 FIG. 5 is a cross-sectional view illustrating a portion in which the cross ring 170 is disposed in a compression part of FIG. 1 FIG. 6 is a cross-sectional view illustrating a portion in which the cross ring 170 is disposed in a compression part of

[0119] Hereinafter, the scroll compressor 100 of the present application will be described with reference to FIGS. 1-4 FIG. 1.

[0120] The scroll compressor 100 of the present application includes a housing 110, a main frame 130, a rotating shaft 125, an orbiting scroll 150, a fixed scroll 140, and a cross ring 170.

[0121] In addition, the cross ring 170 includes a ring body 173 and a key part.

[0122] The ring body 173 is formed in a ring shape, is disposed between the main frame 130 and the orbiting scroll 150, and is supported in an axial direction of the rotating shaft 125.

[0123] The key part extends from the ring body 173 in the axial direction and is slidably inserted into a key receiving part disposed in the orbiting scroll 150 or the main frame 130 or the fixed scroll 140.

[0124] The key part can include an orbiting key 171 and a main key 175, which will be described later.

[0125] The key receiving part can include an orbiting key receiving part 155 and a main key receiving part 131b, which will be described later.

[0126] An oil supply passage is provided in the ring body 173 or the key portion, and is configured to guide oil accumulated in a member supporting the ring body 173 toward between the key portion and the key receiving portion.

[0127] The oil supply passage can be at least one of an oil supply groove 171a, an oil supply hole 272b, and an oil supply surface portion 373a, which will be described later.

[0128] A plurality of scroll plates are formed to be engaged with each other. In addition, the plurality of scroll plates include a revolving scroll plate 150.

[0129] In addition, as will be described later, the plurality of scroll plates can further include a fixed scroll plate 140.

[0130] The revolving scroll plate 150 is configured to be combined with the rotation shaft 125 and perform a revolving motion.

[0131] The cross ring 170 is slidably combined with the revolving scroll plate 150, and the cross ring 170 guides the revolving motion of the revolving scroll plate 150.

[0132] At least one revolving key receiving portion 155 is provided in the revolving scroll plate 150. In addition, at least one revolving key 171 is provided to protrude from the cross ring 170, and the revolving key 171 is slidably inserted into the revolving key receiving portion 155.

[0133] The revolving key receiving portion 155 can be formed in a face opposite to a face in which the revolving scroll portion 153 is formed in the revolving scroll plate 150. The face opposite to the face in which the revolving scroll portion 153 is formed can be a revolving end plate portion 151 of the revolving scroll plate 150, which will be described later. The revolving end plate portion 151 will be described later.

[0134] In addition, an oil supply groove 171a extending obliquely from a lower side to an upper side is formed in at least one side surface of the revolving key 171 or at least one inner circumferential surface of the revolving key receiving portion 155. The oil supply groove 171a is formed in the revolving key 171 or the revolving key receiving portion 155, and is capable of allowing oil to flow from a lower end to an upper end of the key.

[0135] The structure capable of more actively and directly supplying oil to the key of the cross ring 170 according to the present application will be described in more detail later.

[0136] In the scroll compressor 100 according to the present application, as shown in FIG. 1 A revolving scroll plate 150, a fixed scroll plate 140, and a main frame 130 can be accommodated in an inside of a housing 110.

[0137] The housing 110 is configured to have a closed internal space. As an example, the housing 110 can have a cylindrical shape.

[0138] A driving motor 120 including a stator 121 and a rotor 122 can be provided inside the housing 110. The stator 121 can be fixedly provided in the inner circumferential surface of the housing 110 in a thermal press-fit manner, and the rotor 122 can be rotatably disposed inside the stator 121.

[0139] The housing 110 of the present embodiment can include a cylindrical case 111, an upper cap 112, and a lower cap 113. Thus, the inner space of the housing 110 can be divided into an upper space 110b provided inside the upper cap 112, an intermediate space 110c provided inside the cylindrical case 111, and a lower space 110d provided inside the lower cap 113, based on the flow order of the refrigerant. Hereinafter, the upper space 110b can be defined as a discharge space, the intermediate space 110c can be defined as an oil separation space, and the lower space 110d can be defined as an oil storage space.

[0140] The cylindrical case 111 has a cylindrical shape with both ends open, the driving motor 120 is pressed into and fixed in the lower half of the inner circumferential surface of the cylindrical case 111, and the main frame 130 is pressed into and fixed in the upper half of the inner circumferential surface of the cylindrical case 111.

[0141] In the intermediate space 110c of the cylindrical case 111, specifically, the refrigerant discharge pipe 116 is penetrated and coupled between the driving motor 120 and the main frame 130. The refrigerant discharge pipe 116 can also be directly inserted and welded to the cylindrical case 111, but generally, a collar pipe (not shown) made of the same material as the cylindrical case 111 can be inserted and welded to the cylindrical case 111, and the refrigerant discharge pipe 116 made of a copper pipe can be inserted and welded to the collar pipe.

[0142] The upper cap 112 is coupled to cover the open upper end of the cylindrical case 111. The refrigerant suction pipe 115 is penetrated and coupled to the upper cap 112, and the refrigerant suction pipe 115 passes through the upper space 110b of the housing 110 and is directly connected to the suction chamber (not shown) of the compression section described later. Thus, the refrigerant can be supplied to the suction chamber through the refrigerant suction pipe 115.

[0143] The lower cap 113 is coupled to cover the open lower end of the cylindrical case 111. The lower space 110d of the lower cap 113 will form an oil storage space, and a predetermined amount of oil can be stored in the oil storage space. The lower space 110d constituting the oil storage space can be communicated with the upper space 110b and the intermediate space 110c of the housing 110 through an oil recovery passage (not shown). Thus, the oil separated from the refrigerant in the upper space 110b and the intermediate space 110c and the oil recovered after being first supplied to the compression section can be recovered through the oil recovery passage and stored in the lower space 110d constituting the oil storage space.

[0144] Referring to FIG. 1 The driving motor 120 of the present embodiment is disposed in the lower half of the intermediate space 110c constituting the high-pressure portion in the internal space of the housing 110, and includes a stator 121 and a rotor 122. The stator 121 is fixed to the inner wall surface of the cylindrical housing 111 in a shrink fit manner, and the rotor 122 is rotatably disposed inside the stator 121.

[0145] The stator 121 includes a stator core 1211 and a stator coil 1212.

[0146] The stator core 1211 is formed in a cylindrical shape and can be fixed to the inner circumferential surface of the cylindrical housing 111 in a shrink fit manner. The stator coil 121a is wound around the stator core 1211 and can be electrically connected to an external power source using a terminal (not shown) penetrating the housing 110.

[0147] The rotor 122 can include a rotor core 1221 and a permanent magnet 1222.

[0148] The rotor core 1221 can be formed in a cylindrical shape and is rotatably inserted into the inside of the stator core 1211 at a predetermined gap size apart from the stator core 1211. The permanent magnet 1222 can be embedded in the inside of the rotor core 1221 at a predetermined interval in the circumferential direction.

[0149] The rotating shaft 125 can be press-fitted to the rotor 122. The upper end portion of the rotating shaft 125 is provided with an eccentric portion rotatably supported in the radial direction by the main frame 130 described later, and the lower end portion of the rotating shaft 125 is rotatably supported in the radial and axial directions by the sub-frame 118.

[0150] In addition, an oil supply hole 1255 parallel to the shaft direction of the rotating shaft 125 can be formed in the inside of the rotating shaft 125, and the oil supply hole 1255 is formed through between the upper end and the lower end of the rotating shaft 125. The oil supply hole 1255 can be formed through from the lower end of the rotating shaft 125 to the bottom surface of the eccentric portion 1251. Thus, the oil stored in the lower space 110d constituting the oil storage space can be supplied to the inside of the eccentric portion 1251 through the oil supply hole 1255.

[0151] In addition, an oil wick 126 can be provided at the lower end of the rotating shaft 125, and more specifically, at the lower end of the oil supply hole 1255. The oil wick 126 can be configured to be immersed in the oil stored in the oil storage space 110d. Thus, the oil stored in the oil storage space 110d can be sucked by the oil wick 126 and sucked up through the oil supply hole 1255.

[0152] The main frame 130 includes a main flange portion 131 and a shaft support protrusion 132.

[0153] The main flange portion 131 is formed in a ring shape and accommodated in the intermediate space 110c of the cylindrical case 111. For example, the outer peripheral surface of the main flange portion 131 can be formed in a circular shape and abut against the inner peripheral surface of the cylindrical case 111. In this case, at least one oil recovery hole (not shown) that penetrates in the axial direction can be formed between the outer peripheral surface and the inner peripheral surface of the main flange portion 131.

[0154] In addition, at least one frame fixing protrusion (not shown) that extends in the radial direction can be formed on the outer peripheral surface of the main flange portion 131. The outer peripheral surface of the frame fixing protrusion can abut against and be fixed to the inner peripheral surface of the cylindrical case 111. In this case, the frame fixing protrusion can be formed with second discharge passage grooves 1311 that are spaced apart in the circumferential direction and penetrate between the axial both side surfaces of the main flange portion 131. The second discharge passage grooves 1311 can be formed to communicate with each other on the same axis as the first discharge passage grooves 1421 described later. Thereby, the upper space 110b and the intermediate space 110c communicate with each other, and the refrigerant discharged from the compression portion to the upper space 110b can move to the intermediate space 110c and be discharged to the condenser through the refrigerant discharge pipe 116.

[0155] In addition, a cross ring accommodating portion 131a can be formed on the top surface of the main flange portion 131, and a main key accommodating portion 131b can be formed in the cross ring accommodating portion 131a. Referring to FIG. 6 , an example in which the cross ring accommodating portion 131a is formed on the top surface of the main flange portion 131, and two main key accommodating portions 131b that are spaced apart by a phase difference of substantially 180° in the circumferential direction from each other are formed in the cross ring accommodating portion 131a is shown.

[0156] As an example, the cross ring accommodating portion 131a can be formed in a ring shape to accommodate the cross ring 170 in a ring shape. Preferably, the width of the ring shape of the cross ring accommodating portion 131a is greater than the width of the ring body 173 of the cross ring 170, so that the cross ring 170 can be accommodated without interference.

[0157] In addition, oil that is sucked from the oil storage space can be accommodated in the cross ring accommodating portion 131a, and the oil can be supplied to the oil supply groove 171a, the oil supply hole 172b, and the like of the cross ring 170.

[0158] The main key accommodating portion 131b can be formed in the radial direction with respect to the circumferential direction of the ring body 173 of the cross ring 170 disposed in the cross ring accommodating portion 131a, and thus the cross ring 170 can slide in the radial direction in which the main key accommodating portion 131b is formed.

[0159] Preferably, the main key accommodating portion 131b can be formed in a length longer than a length of the main key 175 in a direction in which the main key 175 of the cross ring 170 slides, so that the main key 175 can move by a predetermined distance.

[0160] The main key 175 of the cross ring 170, which will be described later, can be slidably inserted into the main key accommodating portion 131b in a radial direction.

[0161] In this case, a liner constituting an anti-wear member can be inserted into the main key accommodating portion 131b, or the main key 175 of the cross ring 170 inserted into the main key accommodating portion 131b can be formed of a different material (a different kind of material) from the ring body 173 of the cross ring 170.

[0162] For example, in the case where the main frame 130 is formed of the same material (a material) as the main key 175 of the cross ring 170, a liner constituting a different material from the main frame 130 or the cross ring 170 can be provided to be able to suppress wear between the main frame 130 and the cross ring 170.

[0163] However, in the case where the main frame 130 and the main key 175 of the cross ring 170 are formed of different materials (for example, the main frame 130 is formed of a cast iron material, and the main key 175 of the cross ring 170 is formed of an aluminum material), it is not necessary to provide an additional liner in the main key accommodating portion 131b.

[0164] The shaft support protrusion 132 extends from the center of the main flange portion 131 toward the driving motor 120, and a shaft support hole 1321 is formed inside the shaft support protrusion 132. The shaft support hole 1321 can also be formed to penetrate both sides of the shaft in the axial direction of the main flange portion 131. Thus, the main flange portion 131 can be formed in a ring shape.

[0165] Referring to FIGS. 1-3 The fixed scroll 140 of the present embodiment can include a fixed end plate portion 141, a fixed side wall portion 142, and a fixed scroll wrap portion 143.

[0166] The fixed end plate portion 141 can be formed in a disc shape. An outer circumferential surface of the fixed end plate portion 141 can be formed to be in close contact with an inner circumferential surface of the upper cap 112 constituting the upper space 110b, or can be formed to be spaced apart from the inner circumferential surface of the upper cap 112.

[0167] In addition, a suction port 1411 through which a suction chamber (not shown) is communicated in the axial direction can be formed at the edge of the fixed end plate portion 141, and a refrigerant suction pipe 115 that penetrates the upper cap 112 of the housing 110 can be inserted and coupled to the suction port 1411. Thus, the refrigerant suction pipe 115 can be directly communicated with the suction port 1411 of the fixed scroll 140 through the upper space 110b of the housing 110.

[0168] In addition, a discharge port 1412 and a bypass hole (not shown) can be formed in the center of the fixed end plate portion 141, and a discharge valve 145 that opens and closes the discharge port 1412 and a bypass valve (not shown) that opens and closes the bypass hole can be provided on the top surface of the fixed end plate portion 141. Thus, refrigerant compressed in the compression chamber V is discharged from the upper side of the fixed scroll 140 to the upper space 110b formed in the upper cap 112.

[0169] The fixed side wall portion 142 can extend in a ring shape from the edge of the fixed end plate portion 141 toward the main frame 130. Thus, the bottom surface of the fixed side wall portion 142 can be in close contact with the top surface of the main frame 130, that is, the top surface of the main flange portion 131, and be fastened by a bolt.

[0170] At least one first discharge passage groove 1421 can be formed in the outer peripheral surface of the fixed side wall portion 142. The first discharge passage groove 1421 can be formed so as to be recessed from the outer peripheral surface of the fixed scroll 140 and communicate between the axial both sides of the fixed scroll 140. For example, the first discharge passage groove 1421 can be formed so as to communicate from the top surface of the fixed end plate portion 141 to the bottom surface of the fixed side wall portion 142. Thus, the upper end of the first discharge passage groove 1421 can communicate with the upper space 110b, and the lower end of the first discharge passage groove 1421 can communicate with the upper end of the second discharge passage groove 1311 provided in the main frame 130.

[0171] The fixed scroll portion 143 can extend from the bottom surface of the fixed end plate portion 141 toward the orbiting scroll 150. The fixed scroll portion 143 can be formed in various shapes such as an involute. The fixed scroll portion 143 can be engaged with the orbiting scroll portion 153 described later to form two pairs of compression chambers V.

[0172] Referring to FIG. 1 The orbiting scroll 150 of the present embodiment can include an orbiting end plate portion 151, a rotation shaft coupling portion 152, and an orbiting scroll portion 153.

[0173] The orbiting end plate portion 151 is formed in a disc shape, is supported in the axial direction by the main frame 130, and is configured to perform orbiting motion between the main frame 130 and the fixed scroll 140.

[0174] An orbiting key accommodating portion 155 is formed in the side surface of the orbiting end plate portion 151, that is, the opposite side surface of the orbiting scroll portion 153, and an orbiting key 171 constituting a part of the cross ring 170 described later can be provided in the orbiting key accommodating portion 155. The orbiting keys 171 can be provided in two at a phase difference of substantially 180° from each other in the circumferential direction.

[0175] In addition, the swivel key 171 or the swivel key accommodation portion 155 of the present application can be formed with an oil supply groove 171a capable of guiding the flow of oil to the swivel key 171, so that oil is more smoothly supplied to the swivel key 171 as the cross ring 170 moves, thereby enabling improved reliability.

[0176] The swivel key 171 can be formed to extend in the axial direction toward the cross ring 170 so as to be slidably inserted in the swivel key accommodation portion 155 of the cross ring 170 described later in the radial direction. The structure of the swivel key 171, the swivel key accommodation portion 155, and the oil supply groove 171a formed therein, etc. will be described again later together with the cross ring 170.

[0177] The rotation shaft coupling portion 152 can extend from the geometric center of the swivel scroll 150 toward the eccentric portion 1251 of the rotation shaft 125. The rotation shaft coupling portion 152 can be rotatably inserted into the eccentric portion 1251 of the rotation shaft 125. Thereby, the swivel scroll 150 will perform a swivel motion using the eccentric portion 1251 of the rotation shaft 125 and the rotation shaft coupling portion 152.

[0178] The swivel scroll portion 153 can extend from the top surface of the swivel end plate portion 151 toward the fixed scroll 140. The swivel scroll portion 153 can be formed in various shapes such as an involute in correspondence with the fixed scroll portion 143.

[0179] The cross ring 170 can be disposed between the main frame 130 and the swivel scroll 150. Of course, the cross ring 170 can also be disposed between the fixed scroll 140 and the swivel scroll 150 depending on the situation. However, in the present application, the case where the cross ring 170 is disposed between the main frame 130 and the swivel scroll 150 will be mainly described.

[0180] For example, the cross ring 170 can be slidably coupled to the main frame 130 and the swivel scroll 150, respectively. Thereby, the cross ring 170 will restrict the rotational motion of the swivel scroll 150 so that the swivel scroll 150 performs a swivel motion with respect to the main frame 130. The cross ring 170 will be described again later.

[0181] The scroll compressor 100 of the present embodiment described above has the following effects.

[0182] That is, if a power source is applied to the drive motor 120 to generate a rotational force, the swivel scroll 150 eccentrically coupled to the rotation shaft 125 performs a swivel motion with respect to the fixed scroll 140 due to the cross ring 170. At this time, two pairs of compression chambers V that continuously move are formed between the fixed scroll 140 and the swivel scroll 150.

[0183] Thus, during the orbiting motion of the orbiting scroll 150, the compression chamber V moves from the suction port (or suction chamber) 1411 to the discharge port (or discharge chamber) 1412 side and the volume gradually narrows.

[0184] Thus, the refrigerant flows into the compression chamber V through the refrigerant suction pipe 115 and the suction port 1411 of the fixed scroll 140, and is finally moved to the compression chamber direction by the orbiting scroll 150 and is compressed. The refrigerant is finally discharged from the compression chamber to the upper space 110b of the housing 110 through the discharge port 1412 of the fixed scroll 140, and moves to the intermediate space 110c and / or the lower space 110d of the housing 110 through the refrigerant guide passage composed of the first discharge passage groove 1421 and the second discharge passage groove 1311.

[0185] Thus, a series of processes will be repeated, as the refrigerant circulates in the internal space 110a of the housing 110, the oil is separated from the refrigerant, the oil separated from the refrigerant moves to the oil storage space forming the lower space 110d of the housing 110 and is stored, and then is supplied to the compression section through the oil pickup 126 and the oil supply hole 1255 of the rotating shaft 125, while the refrigerant from which the oil is separated is discharged to the outside of the housing 110 through the refrigerant discharge pipe 116.

[0186] On the other hand, as described above, the orbiting scroll 150 is slidably coupled to the cross ring 170, and will perform an orbiting motion with respect to the fixed scroll or / and the main frame 130.

[0187] The scroll compressor 100 of the present application includes a plurality of scrolls and a cross ring 170.

[0188] The plurality of scrolls are formed to engage with each other. In addition, the plurality of scrolls include the orbiting scroll 150.

[0189] In addition, the plurality of scrolls not only include the orbiting scroll 150, but also include the aforementioned fixed scroll 140. The fixed scroll 140 will form a compression chamber together with the orbiting scroll 150.

[0190] The orbiting scroll 150 is configured to be coupled to the rotating shaft 125 and to perform an orbiting motion.

[0191] As described above, the orbiting scroll 150 can be coupled to the rotating shaft 125 by having a rotating shaft coupling portion 152. In addition, the rotating shaft 125 is rotated by the rotation of the drive motor 120, and the rotating shaft coupling portion 152 of the orbiting scroll 150 can perform an orbiting rotation by being coupled to the eccentric portion of the rotating shaft 125.

[0192] The cross ring 170 is slidably coupled with respect to the orbiting scroll 150 and guides the orbiting movement of the orbiting scroll 150.

[0193] The orbiting scroll 150 is provided with at least one orbiting key receiving portion 155, and the cross ring 170 is formed with at least one protruding orbiting key 171 to be slidably inserted into the orbiting key receiving portion 155.

[0194] In addition, at least one side surface of the orbiting key 171 or at least one inner circumferential surface of the orbiting key receiving portion 155 can be formed with an oil supply groove 171a extending obliquely from a lower side to an upper side. The oil supply groove 171a is formed in the orbiting key 171 or the orbiting key receiving portion 155 and is capable of allowing oil to flow from a lower end to an upper end of the orbiting key 171.

[0195] That is, the scroll compressor 100 of the present application applies a groove structure of an oblique end of an edge portion or the like, thereby more smoothly supplying oil to a key portion as the cross ring 170 moves, and thus reliability can be improved.

[0196] In addition, the scroll compressor 100 of the present application applies an oblique oil supply hole machining and a key contact portion oil supply groove, thereby more smoothly supplying oil to the orbiting key 171 as the cross ring 170 moves, and thus reliability can be improved.

[0197] In the scroll compressor 100 of the present application, the orbiting key receiving portion 155 is provided to the orbiting scroll 150, and the orbiting key 171 is provided to the cross ring 170.

[0198] The key provided to the cross ring 170 and slidably inserted into the key of the orbiting scroll 150 is named as the orbiting key 171, and the groove into which the orbiting key 171 is inserted is named as the orbiting key receiving portion 155.

[0199] In addition, as will be described later, the key provided to the cross ring 170 and slidably inserted into the key of the main frame can be named as a main key 175, and the groove into which the main key 175 is inserted can be named as a main key receiving portion 131b. However, it is not necessarily limited to such names, and the orbiting key 171 and the main key 175 can be named as a first key and a second key, respectively (or the order can be reversed), and the orbiting key receiving portion 155 and the main key receiving portion 131b can be named as a first key groove and a second key groove, respectively (or the order can be reversed).

[0200] FIG. 6 is a plan view showing an example in which a cross ring is provided to a cross ring receiving portion of a main frame, FIG. 7 is an exploded perspective view showing a main frame and a cross ring. Also, FIG. 8 is an exploded perspective view showing an orbiting scroll and a cross ring, FIG. 9AFigure 10 is a perspective view of the cross ring according to the first embodiment, and Figure 11 is a perspective view of the cross ring according to the second embodiment. FIG. 11 This is a perspective view showing the cross ring of the third embodiment. FIG. 12A This is a perspective view showing the cross ring of the fourth embodiment. FIG. 12B This is a perspective view showing the bottom surface of the vortex disk provided with the cross ring in the fourth embodiment.

[0201] Below, refer to FIGS. 6-12B The cross rings of the first to fourth embodiments of the present invention will be described.

[0202] FIG. 9A An example of a cross ring 170 is shown, and this cross ring 170 is named the cross ring 170 of the first embodiment. Hereinafter, refer to... FIG. 9A The cross ring 170 of the first embodiment will be described.

[0203] in addition, FIG. 8 An example is shown in which a key receiving portion 155 is provided on the bottom surface of the swirling end plate portion 151 of the swirling scroll 150, and a key 171 is provided on the cross ring 170 adjacent to it.

[0204] In this invention, the case in which a rotary key receiving portion 155 is provided in the rotary scroll disk 150 and a rotary key 171 is provided in the cross ring 170 is described as an example.

[0205] However, this is not a limitation, and it does not completely exclude the example of the rotary key receiving part 155 being provided in the cross ring 170 and the rotary key 171 being provided in the rotary scroll 150.

[0206] An oil supply groove 171a is formed on one side of the rotary key 171, extending obliquely from the lower side to the upper side. The oil supply groove 171a allows oil to flow from the lower end to the upper end of the rotary key 171.

[0207] The oil supply groove 171a can be provided on both sides of the key portion formed between the outer side of the key portion formed in the circumferential direction and the inner side of the key portion formed in the circumferential direction.

[0208] like FIG. 9A As shown, an example is illustrated where the oil supply groove 171a is formed in each rotary key 171 on two sides that are located on opposite sides of each other.

[0209] As an example, the oil supply groove 171a can extend obliquely from a portion on the lower side of the outer periphery of the cross ring 170 to a portion on the upper side of the inner periphery of the cross ring 170.

[0210] FIG. 7An example in which the inclined oil supply groove 171a is formed on each of the scroll keys 171 spaced 180 degrees from each other in the ring body 1732 is shown.

[0211] In addition, FIG. 9A An example in which the oil supply groove 171a is formed from a portion of the lower right side to a portion of the upper left side in one scroll key 171 is shown.

[0212] Such an inclined direction is a direction rising toward the inside of the cross ring 170, so that the oil receiving the centrifugal force can move toward the inside of the cross ring 170, and at the same time, can become a structure more promoting the upward direction flow of the oil contacting the scroll key 171 of the cross ring 170.

[0213] By forming the oil supply groove 171a inclined in the up-and-down direction on one face of the scroll key 171 of the cross ring 170, as the cross ring 170 moves, the oil contacting the cross ring 170 will flow more actively in the scroll key 171 through the oil supply groove 171a, and more smoothly supply the oil to the scroll key 171, so that the contact portion with the oil is increased in each face of the scroll key 171, and thus the reliability can be improved.

[0214] In addition, the cross ring 170 can further be provided with a ring body 173. The ring body 173 is formed in a ring shape, and the scroll key 171 can be protruded from one face of the ring body 173 toward the direction of the scroll key accommodating portion 155.

[0215] FIG. 7 An example in which the scroll key 171 is formed on the top face of the ring-shaped ring body 173 protruding toward the direction of the scroll end plate portion 151 of the scroll orbiting scroll 150 is shown. In addition, an example in which two scroll keys 171 are disposed at an interval of 180 degrees from each other in the shape of a cuboid is shown.

[0216] As described above, the scroll compressor 100 of the present application can improve the actual load efficiency corresponding to the low pressure ratio operation by the structure in which the inclined oil supply groove 171a is formed on the scroll key 171, thereby securing the low pressure ratio operation reliability.

[0217] On the other hand, referring to FIG. 7 and FIG. 8 The cross ring 170 can further be provided with a main key 175. In addition, the main frame 130 can be provided with a main key accommodating portion 131b capable of slidably inserting and accommodating the main key 175.

[0218] As an example, the main key 175 can be formed to protrude downward from the opposite side bottom face of the ring body 173 in which the scroll key 171 is formed. In addition, as FIG. 7 and FIG. 8As shown, the main keys 175 can be arranged at intervals of 180 degrees from each other, and preferably, are alternately arranged at intervals of 90 degrees from each other in the circumferential direction with the swirl keys 171.

[0219] The main keys 175 can be formed in a cuboid shape like the swirl keys 171. In addition, the main key accommodating portions 131b can be formed on the main frame 130 in the radial direction to slidably accommodate the main keys 175 in the radial direction, FIG. 7 An example of the main key accommodating portion 131b formed in the radial direction of the main frame 130 is shown, and an example of the main key accommodating portion 131b formed in an elliptical long groove shape at the upper and lower portions is shown in the drawing.

[0220] On the other hand, referring to FIG. 7 and FIG. 8 A support portion 177 can be provided between the two swirl keys 171 on the top surface of the ring body 173, and a support portion 177 can also be provided between the two main keys 175 on the bottom surface of the ring body 173. The support portion 177 on the top surface of the ring body 173 can be in contact with the swirl scroll 150, and the support portion 177 on the bottom surface of the ring body 173 is in contact with the main frame 130. By providing the support portions 177 on the top and bottom surfaces of the ring body 173, respectively, the cross roller is supported between the main frame 130 and the swirl scroll 150 and can slide.

[0221] The cross roller 170 prevents the swirl scroll 150 from rotating by the structure in which the main keys 175 are slidable in the main key accommodating portions 131b and the swirl keys 171 are slidable in the swirl key accommodating portions 155.

[0222] FIGS. 9B-9E An example of the cross roller of the first embodiment of the application is shown, and a description thereof will be given below. FIG. 9A

[0223] On the other hand, the oil supply groove 171a-1 can be formed in at least one of the outer side surface formed in the circumferential direction of the key portion and the inner side surface formed in the circumferential direction of the key portion.

[0224] Referring to FIG. 9B , an example in which the oil supply groove 171a-1 is formed in the outer side surface formed in the circumferential direction of the swirl key 171 and the inner side surface formed in the circumferential direction of the swirl key 171, respectively, is shown.

[0225] Such a structure can be a structure that is advantageous for causing the oil accumulated in the inner and outer circumferences of the cross roller 170 to rise in the cross roller through the oil supply groove 171a-1.

[0226] However, the oil supply groove 171a-1 can also be formed only in the inner side surface formed in the circumferential direction of the swirl key 171.

[0227] ​In the case where the oil supply groove 171a-1 is formed only on the inner side surface of the spiral key 171, it can be a structure that is advantageous for the oil accumulated on the inner side of the cross roller to rise.

[0228] In addition, the oil supply grooves 171a-2, 171a-3 can be formed in a multi-stage structure in which a plurality of oil supply grooves 171a-2, 171a-3 are spaced apart from each other on both side surfaces of the key portion.

[0229] In addition, in the rotation direction of the rotation shaft, the number or width of the oil supply grooves 171a-2 on the side surface disposed in front in the rotation direction of the rotation shaft among the both side surfaces can be greater than the number or width of the oil supply grooves 171a-3 on the side surface disposed in rear in the rotation direction of the rotation shaft.

[0230] In the present application, the both side surfaces can be understood as the side surfaces of the spiral key disposed on both sides between the outer periphery and the inner periphery of the cross roller (in FIG. 9A and FIG. 9C the surfaces in which the oil supply grooves are formed).

[0231] Referring to FIG. 9C , an example in which a plurality of oil supply grooves spaced apart from each other are formed on each of the both side surfaces of the spiral key is shown. In FIG. 9C , an example in which, in the rotation direction of the rotation shaft indicated by an arrow, four oil supply grooves 171a-2 are provided on the side surface of the spiral key in front and have a relatively wider width than the oil supply grooves 171a-3 provided on the side surface of the spiral key in rear is shown.

[0232] In addition, FIG. 9C an example in which, in the rotation direction of the rotation shaft indicated by an arrow, three oil supply grooves 171a-3 are provided on the side surface of the spiral key in rear (shown in a dotted line) and the width of the oil supply grooves 171a-3 is relatively narrower than the width of the oil supply grooves 171a-2 provided on the side surface of the spiral key in front is shown.

[0233] Due to such a structure, relatively more oil flows to the side surface of the spiral key disposed in front in the rotation direction of the rotation shaft, and thus it becomes a structure that is more advantageous for oil supply.

[0234] In addition, the oil supply grooves 171a-4 can be formed on the both side surfaces of each key portion so that a plurality of oil supply grooves 171a-4 cross each other.

[0235] Referring to FIG. 9D , an example in which two oil supply grooves 171a-4 are formed on the both side surfaces of the spiral key 171 in a structure in which they cross each other along diagonals is shown.

[0236] Such a structure is the same as FIG. 9AThe oil supply groove 171a described in the middle can be a structure that is advantageous for causing oil accumulated on the inner side portion of the cross roller 170 to rise.

[0237] In addition, the oil supply groove 171a-5 can be formed in parallel with the extending direction of the rotation shaft 125. Also, the oil supply groove 171a-6 can also be formed in the radial direction.

[0238] Referring to FIG. 9E , an example is shown in which the oil supply groove 171a-5 is formed in a direction (up and down direction) parallel with the extending direction of the rotation shaft 125, and the oil supply groove 171a-6 is formed in the radial direction (left and right direction) intersecting the extending direction of the oil supply groove 171a-5.

[0239] With such a structure, it is possible to become a structure that causes oil to flow in the upward direction, and that is advantageous for retaining oil on the side surface of the rolling key 171 of the cross roller 170.

[0240] FIG. 10A Another example of the cross roller 270 is shown, which is named as the cross roller 270 of the second embodiment. Hereinafter, the cross roller 270 of the second embodiment is described with reference to FIG. 10.

[0241] Referring to FIG. 10A , the aforementioned oil supply passage can be an oil supply hole 272b that penetrates the face of the ring body 273 connected to at least one of the side surfaces of the key portion.

[0242] FIG. 8 An example is shown in which the rolling key accommodating portion 155 is provided on the bottom surface of the rolling end plate portion 151 of the rolling scroll 150, and the rolling key 271 is provided on the cross roller 270 adjacent thereto.

[0243] As described above, in the present application, mainly the example in which the rolling key accommodating portion 155 is provided on the rolling scroll 150, and the rolling key 271 is provided on the cross roller 270 is described.

[0244] However, it is not necessarily limited thereto, and the example in which the rolling key accommodating portion 155 is provided on the cross roller 270, and the rolling key 271 is provided on the rolling scroll 150 is not completely excluded.

[0245] In addition, the oil supply groove 271a is formed on one face of the rolling key 271, which extends obliquely from the lower side to the upper side. The oil supply groove 271a can cause oil to flow from the lower end to the upper end of the rolling key 271.

[0246] Of course, although FIG. 10A An example is shown in which the oil supply groove 271a is formed on only one side face of the rolling key 271, but it can also be formed on both side faces of the rolling key 271.

[0247] As an example, the oil supply groove 171a can extend obliquely from a portion of the lower side of the outer circumferential side of the cross ring 270 to a portion of the upper side of the inner circumferential side of the cross ring 270.

[0248] FIG. 7 An example in which each of the spiral keys 271 on the ring body 173 is formed with an oblique oil supply groove 171a is shown.

[0249] In addition, FIG. 10A An example in which one of the spiral keys 271 is formed with an oil supply groove 271a formed from a portion of the lower right side to a portion of the upper left side is shown.

[0250] Such an oblique direction is a direction rising toward the inner side of the cross ring 270, so that oil subjected to centrifugal force can move toward the inner side of the cross ring 270, and at the same time, can become a structure that more promotes the upward direction flow of oil in contact with the spiral key 271 of the cross ring 270.

[0251] By forming the oil supply groove 271a obliquely in the up-down direction on one face of the spiral key 271 of the cross ring 270, as the cross ring 270 moves, oil in contact with the cross ring 270 will flow more actively in the spiral key 271 through the oil supply groove 271a, and more smoothly supply oil to the spiral key 271, so that the portion in contact with oil in each face of the spiral key 271 increases, and thus the reliability can be improved.

[0252] In addition, the cross ring 270 can further include a ring body 273. The ring body 273 can be formed in a ring shape, and the spiral key 271 can protrude from one face of the ring body 273 toward the direction of the spiral key accommodation portion 155.

[0253] Referring to FIG. 7 and FIG. 10A , an example in which the spiral key 271 is formed protruding from the top face of the ring-shaped ring body 273 toward the direction of the spiral end plate portion 151 of the spiral scroll 150 is shown. In addition, an example in which two spiral keys 271 are disposed at an interval of 180 degrees in the shape of a cuboid is shown.

[0254] FIG. 10A The cross ring 270 of FIG. 9A differs from the cross ring 170 of

[0255] The oil supply hole 272b can be obliquely formed in the ring body 273, and the oil supply hole 272b can be formed obliquely through the upper and lower ends of the ring body 273.

[0256] In addition, the oil supply hole 272b can be formed so that the upper end thereof is adjacent to the side face of the spiral key 271.

[0257] As FIG. 10A shown, an example is shown in which the oil supply hole 272b is formed obliquely through the top surface of the ring body 273 to be adjacent to the left side surface of the swing key 271 and to maintain a predetermined angle. In addition, FIG. 10A and FIG. 13 an example is shown in which the oil supply hole 272b is formed on the left side and the right side of the swing key 271, respectively, so that oil can flow in both directions.

[0258] In addition, the diameters of the oil supply holes 272b formed on the two side surfaces, respectively, can be the same.

[0259] With the structure in which the oil supply hole 272b is formed obliquely in the ring body 273 and through the upper and lower ends of the ring body 273, oil stored in the cross roller housing portion 131a can flow from the bottom surface to the top surface of the cross roller 270 along the oil supply hole 272b when the cross roller 270 moves relative to the main frame 130.

[0260] In addition, as the oil supply to the oblique oil supply groove 271a formed in the one surface of the swing key 271 of the cross roller 270 in the up-and-down direction becomes more active, the oil supply to the swing key 271 becomes smoother, the portion in contact with oil in each surface of the swing key 271 increases, and thus the reliability can be improved.

[0261] In addition, in the rotation direction of the rotation shaft 125, the diameter of the oil supply hole 272b-1 disposed on the front side can be larger than the diameter of the oil supply hole 272b-3 disposed on the rear side.

[0262] Referring to FIG. 10B , an example is shown in which the diameter of the oil supply hole 272b-1 disposed on the front side with reference to the rotation direction of the rotation shaft illustrated by an arrow on the right lower end is larger than the diameter of the oil supply hole 272b-3 disposed on the rear side.

[0263] However, it is not necessarily limited to the structure of FIG. 10B , and the oil supply hole 272b-1 can be disposed only on the front side with reference to the rotation direction of the rotation shaft 225.

[0264] According to such a structure, a relatively larger amount of oil can be made to rise on the front side in the rotation direction of the rotation shaft 125 using the rotational force of the cross roller 270.

[0265] FIG. 10A and FIG. 10B , an example is shown in which the oil supply holes 272b, 272b-1 are formed in the circumferential direction.

[0266] On the other hand, the oil supply hole 272b-3 can also be formed in the radial direction.

[0267] FIG. 10C An example is shown in which the oil supply hole 272b-3 is formed to penetrate the top and bottom surfaces of the ring body 273 adjacent to both side surfaces of the orbit key 271 in the radial direction.

[0268] With this configuration, oil present on the outer circumferential bottom surface of the cross ring 270 can be raised in the radial direction along the oil supply hole 272b-3.

[0269] As described above, the scroll compressor 100 of the present application can ensure low-pressure ratio operation reliability by the configuration in which the oil supply hole 272b is formed in the ring body 273, and thus can improve actual load efficiency corresponding to low-pressure ratio operation.

[0270] On the other hand, referring to FIG. 7 and FIG. 8 The cross ring 170 can further be provided with a main key 175. In addition, the main frame 130 can be provided with a main key receiving portion 131b into which the main key 175 is slidably inserted and received.

[0271] As an example, the main key 175 can be formed to protrude downward from the opposite side bottom surface of the ring body 273 in which the orbit key 271 is formed. In addition, as shown in FIG. 7 and FIG. 8 The main key 175 can be spaced apart by 180 degrees from each other and arranged in two, and preferably, is alternately arranged at an interval of 90 degrees from each other in the circumferential direction from the orbit key 271.

[0272] The main key 175 can be formed in a cuboid shape like the orbit key 271. In addition, the main key receiving portion 131b can be formed in the main frame 130 to slidably receive the main key 175 in the radial direction, FIG. 7 An example of the main key receiving portion 131b formed in the radial direction of the main frame 130 is shown, and an example in which the main key receiving portion 131b is formed in a long groove shape in which the upper and lower portions are elliptical is shown in the drawing.

[0273] On the other hand, referring to FIG. 7 and FIG. 8 A support portion 277 can be provided between the two orbit keys 271 of the top surface of the ring body 273, and a support portion 277 can also be provided between the two main keys 275 of the bottom surface of the ring body 273. The support portion 277 of the top surface of the ring body 273 can be in contact with the orbit scroll 150, and the support portion 277 of the bottom surface of the ring body 273 can be in contact with the main frame 130. By the support portions 277 provided on the top and bottom surfaces of the ring body 273, respectively, the cross ring is supported between the main frame 130 and the orbit scroll 150 and can slide.

[0274] The cross ring 270 is slidable in the main key accommodating portion 131b through the main key 175, and the rotation key 271 is slidable in the rotation key accommodating portion 155, thereby preventing the rotation of the rotation scroll 150.

[0275] FIG. 11 Another example of the cross ring 370 is shown, which is named as the cross ring 370 of the third embodiment. Hereinafter, the cross ring 370 of the third embodiment is described with reference to FIG. 11 The cross ring 370 of the third embodiment is described.

[0276] With reference to FIG. 8 and FIG. 11 , an example in which the rotation key accommodating portion 155 is provided on the bottom surface of the rotation end plate portion 151 of the rotation scroll 150, and the rotation key 371 is provided on the cross ring 370 adjacent thereto is shown.

[0277] As described above, in the present application, the example in which the rotation key accommodating portion 155 is provided on the rotation scroll 150, and the rotation key 371 is provided on the cross ring 370 is mainly described.

[0278] However, it is not necessarily limited thereto, and the example in which the rotation key accommodating portion 155 is provided on the cross ring 370, and the rotation key 371 is provided on the rotation scroll 150 is not completely excluded.

[0279] In addition, the oil supply groove 171a is formed on one side of the rotation key 371 so as to extend obliquely from the lower side to the upper side. The oil supply groove 171a can flow the oil from the lower end to the upper end of the rotation key 371.

[0280] As an example, the oil supply groove 171a can extend obliquely from a portion provided on the lower side of the outer circumferential side of the cross ring 370 to a portion provided on the upper side of the inner circumferential side of the cross ring 370.

[0281] FIG. 7 An example in which the rotation key 171 is formed with the oblique oil supply groove 171a on the ring body 173 at 180 degrees apart from each other is shown.

[0282] In addition, FIG. 11 An example in which the oil supply groove 371a is formed on one rotation key 371 from a portion on the lower right side to a portion on the upper left side is shown.

[0283] Such an oblique direction is a direction rising toward the inner side of the cross ring 370, so that the oil subjected to the centrifugal force can move toward the inner side of the cross ring 370, and at the same time, can be a structure that further promotes the upward flow of the oil in contact with the rotation key 371 of the cross ring 370.

[0284] By forming the oil supply groove 371a inclined in the up-and-down direction on one side of the swing key 371 of the cross 370, oil in contact with the cross 370 moves more actively in the swing key 371 through the oil supply groove 371a as the cross 370 moves, and oil is more smoothly supplied to the swing key 371, so that the portion in contact with oil in each side of the swing key 371 increases, and thus reliability can be improved.

[0285] In addition, the cross 370 can further include a ring body 373. The ring body 373 can be formed in a ring shape, and the swing key 371 can be protruded from one side of the ring body 373 toward the direction of the swing key accommodation portion 155.

[0286] Referring to FIG. 7 and FIG. 11 , an example in which the swing key 371 is formed to protrude from the top surface of the ring body 173 of the ring shape toward the direction of the swing end plate portion 151 of the swing scroll 150 is shown. In addition, an example in which two swing keys 371 are disposed at 180-degree intervals in the shape of a cuboid is shown.

[0287] FIG. 11 The cross 370 of FIG. 9A and FIG. 10A differs from the cross 170, 270 of in that the oil supply surface portion 373a is protruded from the outer periphery of the ring body 373.

[0288] The oil supply surface portion 373a has an inclined surface 373b inclined to be able to flow oil flowing into the lower portion of the cross 370 to the upper portion.

[0289] As an example, the inclined surface 373b can be parallel to the formation direction of the oil supply hole 372b.

[0290] As shown in FIG. 11 , the oil supply surface portion 373a can be a triangular shape having a predetermined width.

[0291] In addition, although not explicitly shown in the drawings, the oil supply surface portion 373a can be provided not only at the outer periphery of the ring body 373 in which the swing key 371 is provided, but also at the inner periphery.

[0292] Therefore, oil can flow to the upper side at both the outer periphery and the inner periphery of the oil supply surface portion 373a.

[0293] In addition, the swing key 371 can be provided with a protruding side portion 371b more protruding toward at least one of the outer periphery and the inner periphery of the ring body 373. The oil supply surface portion 373a can be connected to the protruding side portion 371b to supply oil to the oil supply groove 371a through the upper portion of the inclined surface 373b. FIG. 11The protruding side portion 371b protruding toward the outer periphery of the ring body 373 and the oil supply surface portion 373a connected thereto are shown. The oil supply groove 371a can extend to the side end portion to connect with the inclined surface 373b of the oil supply surface portion 373a.

[0294] Therefore, the oil rising along the inclined surface 373b of the oil supply surface portion 373a can be more urged to rise to the upper portion of the spline 371 by the oil supply groove 371a extending to the protruding side portion 371b.

[0295] As described above, by the oil supply surface portion 373a provided with the inclined surface 373b, the oil accommodated in the cross ring accommodating portion 131a flows from the lower portion of the cross ring 370 to the upper direction along the inclined surface 373b of the outer periphery of the ring body 373, thereby guiding the oil supply to the top surface of the ring body 373.

[0296] In addition, as the oil supply is guided to the top surface of the ring body 373, the oil supply to the inclined oil supply groove 171a formed in the upper and lower directions on one face of the spline 371 of the cross ring 370 will be more active, and the oil supply to the spline 371 will be more smooth, so that the portion in contact with the oil in each face of the spline 371 increases, and thus the reliability can be improved.

[0297] In FIG. 11 In the cross ring 370 shown, the oil supply hole 372b can also be formed obliquely in the ring body 373, and the oil supply hole 372b can pass through the upper and lower ends of the ring body 373 and be formed obliquely.

[0298] In addition, the oil supply hole 372b can be formed so that the upper end thereof is adjacent to the side surface of the spline 371.

[0299] As FIG. 11 shown, an example is shown in which the oil supply hole 372b passes through the top surface of the ring body 373 to be adjacent to the left side surface of the spline 371, and is inclined at a predetermined angle. In addition, FIG. 13 An example is shown in which the oil supply hole 372b is formed on the left side and the right side of the spline 371, respectively, so that the oil can flow in two directions.

[0300] With the structure in which the oil supply hole 372b is formed obliquely in the ring body 373 and passes through the upper and lower ends of the ring body 373, the oil stored in the cross ring accommodating portion 131a can flow from the bottom surface to the top surface of the cross ring 370 along the oil supply hole 372b when the cross ring 370 moves relative to the main frame 130.

[0301] In addition, as the oil supply to the inclined oil supply groove 171a formed in the upper and lower directions on one side of the swivel key 371 of the cross 370 becomes more active, the oil supply to the swivel key 371 becomes more smooth, the portion in contact with the oil in each side of the swivel key 371 increases, and thus the reliability can be improved.

[0302] In particular, referring to FIG. 11 and FIG. 13 , in the cross 370, the inclined surface 373b and the oil supply hole 372b are formed in parallel, and thus in the case where the cross 370 is slidably moved with respect to the main frame 130, the oil at the bottom of the cross 370 can flow along the inclined surface 373b and the inclined angle of the oil supply hole 372b to the top surface of the ring body 373 along the moving direction.

[0303] As described above, the scroll compressor 100 of the present application can improve the actual load efficiency corresponding to the low pressure ratio operation by securing the low pressure ratio operation reliability through the structure in which the oil supply surface portion 373a having the inclined surface 373b is formed in the ring body 373 and the oil supply hole 372b is formed in the ring body 373.

[0304] On the other hand, referring to FIG. 7 and FIG. 8 , the cross 370 can be further provided with the main key 175. In addition, the main frame 130 can be provided with a main key receiving portion 131b in which the main key 175 is slidably inserted and received.

[0305] As an example, the main key 175 can be formed to protrude downward from the bottom surface of the ring body 373 opposite to the swivel key 371. In addition, as shown in FIG. 7 and FIG. 8 , the main key 175 can be spaced apart by 180 degrees and provided in two, and preferably, is alternately arranged at an interval of 90 degrees with respect to the swivel key 371 in the circumferential direction.

[0306] The main key 175 can be formed in a cuboid shape like the swivel key 371. In addition, the main key receiving portion 131b can be formed in the main frame 130 to slidably receive the main key 175 in the radial direction, FIG. 7 An example of the main key receiving portion 131b formed in the radial direction of the main frame 130 is shown, and in the drawing, an example in which the main key receiving portion 131b is formed in a long groove shape in which the upper and lower portions are elliptical is shown.

[0307] On the other hand, referring to FIG. 7 and FIG. 8Support portions 377 can be provided between the two swirl keys 371 on the top surface of the ring body 373, and support portions 377 can also be provided between the two main keys 375 on the bottom surface of the ring body 373. The support portions 377 on the top surface of the ring body 373 can be in contact with the swirl scroll 150, and the support portions 377 on the bottom surface of the ring body 373 are in contact with the main frame 130. By providing the support portions 377 on the top surface and the bottom surface of the ring body 373, respectively, the cross roller is supported between the main frame 130 and the swirl scroll 150 and is able to slide.

[0308] The cross roller 370 is prevented from rotating by the structure in which the main keys 175 are slidable in the main key receiving portions 131b and the swirl keys 371 are slidable in the swirl key receiving portions 155.

[0309] FIG. 12A Another example of a cross roller 470 is shown, which is designated as a cross roller 470 of a fourth embodiment. Hereinafter, the cross roller 470 of the fourth embodiment will be described with reference to FIG. 12A The cross roller 470 of the fourth embodiment will be described.

[0310] With reference to FIG. 8 and FIG. 12A , an example in which the swirl key receiving portions 155 are provided on the bottom surface of the swirl end plate portion 151 of the swirl scroll 150, and the swirl keys 171 are provided on the cross roller 470 adjacent thereto is shown.

[0311] As described above, in the present application, the example in which the swirl key receiving portions 155 are provided on the swirl scroll 150, and the swirl keys 171 are provided on the cross roller 470 is mainly described.

[0312] However, it is not necessarily limited thereto, and the example in which the swirl key receiving portions 155 are provided on the cross roller 470, and the swirl keys 171 are provided on the swirl scroll 150 is not completely excluded.

[0313] FIG. 12A The cross roller 470 of the fourth embodiment is different from the cross roller 470 of the foregoing embodiments in that the oil supply groove 171a is not formed in the swirl key 171.

[0314] On the other hand, the swirl key receiving portion 155 of the swirl scroll 150 provided for the cross roller 470 of the fourth embodiment is formed with the oil supply groove 171a.

[0315] The oil supply groove 171a is formed obliquely from a portion of an inner peripheral surface of the swirl key receiving portion 155 that is in contact with a portion provided on the outer peripheral side of the cross roller 470 on the lower side to a portion that is in contact with a portion provided on the inner peripheral side of the cross roller 470 on the upper side.

[0316] As an example, the oil supply groove 155a can be formed obliquely from a portion on the lower side of the inner periphery side of the swing key accommodating portion 155 provided on the swing end plate portion 151 to a portion on the upper side of the outer periphery side of the swing key accommodating portion 155.

[0317] FIG. 12B An example in which the inner periphery of the swing key accommodating portion 155 on the ring body 173 is formed with the oblique oil supply grooves 155a at 180 degrees apart from each other is shown.

[0318] In addition, FIG. 12B An example in which a plurality of oil supply grooves 171a are formed obliquely on the side surface of the inner periphery of one swing key accommodating portion 155 and arranged apart from each other is shown.

[0319] The oil supply groove 155a is formed on at least one side surface of the key accommodating portion, the oil supply groove 155a is formed obliquely, the outer periphery side of the cross can be the lower end, and the inner periphery side of the cross can be the upper end.

[0320] FIG. 12B An example in which the oil supply groove 155a is formed obliquely on the side surface of the swing key accommodating portion 155 of the swing scroll and arranged apart from each other, and formed from the lower end of the outer periphery side of the cross to the upper end of the inner periphery side of the cross is shown.

[0321] Such an oblique direction is a direction of rising on the inner periphery of the swing key accommodating portion 155, so that oil subjected to centrifugal force due to the swing rotation of the swing scroll 150 can move to the inner side of the inner periphery of the swing key accommodating portion 155, and at the same time, can become a structure that more promotes the upward flow of oil in contact with the swing key 171 of the cross 470.

[0322] In addition, the oil supply groove 155a-1 can be formed on at least one side surface of the key accommodating portion, and the oil supply groove 155a-1 can be formed in the radial direction.

[0323] FIG. 12C An example in which the oil supply groove 155a-1 is formed in the radial direction on the side surface of the swing key accommodating portion 155 of the swing scroll 150 and arranged apart from each other is shown.

[0324] In the case where the oil supply groove 155a-1 is formed in the radial direction, a structure that is advantageous for retaining oil in the swing key accommodating portion 155 can be obtained.

[0325] With such a structure, even if the oil supply groove is not formed on the swing key 471 of the cross 470 differently from the foregoing embodiment, oil can be promoted to flow on the swing key 471 by the oil supply groove 155a of the inner periphery of the swing key accommodating portion 155 in contact therewith.

[0326] In other words, by forming the oil supply groove 155a inclined in the up-down direction on the inner periphery of the orbit key accommodation portion 155 of the orbit scroll 150, as the cross roller 470 moves, the oil in contact with the cross roller 470 will rise through the oil supply groove 155a of the inner periphery of the orbit key accommodation portion 155, whereby the oil flows more actively in the orbit key 171 of the cross roller 470 in contact therewith, and the oil is more smoothly supplied to the orbit key 171, so that the portion in contact with the oil increases in each face of the orbit key 171, and thus the reliability can be improved.

[0327] In particular, like the cross rollers 170, 270, 370 in the other embodiments, the cross roller 470 can also include a ring body 173. The ring body 173 can be formed in a ring shape, and the orbit key 171 can be protruded from one face of the ring body 173 toward the direction of the orbit key accommodation portion 155.

[0328] FIG. 7 An example is shown in which the orbit key 171 is formed to protrude from the top face of the ring body 173 in the direction of the orbit end plate portion 151 of the orbit scroll 150 in a ring shape. In addition, an example is shown in which two orbit keys 171 are arranged at an interval of 180 degrees from each other in a cuboid shape.

[0329] The cross roller 470 of the fourth embodiment differs from the cross rollers 170, 270, 370 of the first to third embodiments in that the oil supply groove 171a is not formed in the orbit key 171. On the other hand, the fourth embodiment can be provided with the oil supply hole 472b like the cross rollers 270, 370 of the second and third embodiments. In addition, the oil supply face portion 473a can also be formed to protrude from the outer periphery of the ring body 173.

[0330] The oil supply face portion 473a has an inclined face 473b inclined to be able to flow the oil flowing into the lower portion of the cross roller 470 to the upper portion.

[0331] As an example, the inclined face 473b can be parallel to the direction in which the oil supply hole 472b is formed.

[0332] As shown in FIG. 12A The oil supply face portion 473a can be a triangular shape having a predetermined width.

[0333] In addition, although not explicitly shown in the drawings, the oil supply face portion 473a can be provided not only on the outer periphery of the ring body 473 in which the orbit key 471 is provided, but also on the inner periphery of the ring body 473.

[0334] Therefore, the oil can flow to the upper side on both the outer periphery and the inner periphery of the oil supply face portion 473a.

[0335] Further, the convex side portion 471b which is more convex toward at least one of the outer periphery and the inner periphery of the ring body 473 can be provided to the swivel key 471. The oil supply surface portion 473a can be connected to the convex side portion 471b to supply oil to the oil supply groove 471a through the upper portion of the inclined surface 473b. FIG. 12A The convex side portion 471b which is convex toward the outer periphery of the ring body 473 and the oil supply surface portion 473a connected thereto are shown. The oil supply groove 471a can extend to the side end portion to be connected to the inclined surface 473b of the oil supply surface portion 473a.

[0336] Therefore, the oil which rises along the inclined surface 473b of the oil supply surface portion 473a can be more promoted to rise to the upper portion of the swivel key 471 through the oil supply groove 471a which extends to the convex side portion 471b.

[0337] With the oil supply surface portion 473a provided with the inclined surface 473b, the oil accommodated in the cross roller accommodating portion 131a of the main frame 130 flows upward from the lower portion of the cross roller 470 along the inclined surface 473b of the outer periphery of the ring body 173, thereby guiding the oil supply to the top surface of the ring body 173.

[0338] Further, as the oil supply to the top surface of the ring body 173 is guided, the inclined oil supply groove 171a which is formed in the upper and lower directions on one surface of the swivel key 171 in the inner periphery of the swivel key accommodating portion 155 will more actively supply oil and more smoothly supply oil to the swivel key 171 which contacts the oil supply groove 171a, thereby increasing the portion which contacts the oil in each surface of the swivel key 171, and thus the reliability can be improved.

[0339] In FIG. 12A In the cross roller 470 shown, the oil supply hole 472b can be formed obliquely in the ring body 173, and the oil supply hole 472b can penetrate the upper and lower end portions of the ring body 173 and be formed obliquely.

[0340] Further, the oil supply hole 472b can be formed so that the upper end portion thereof is adjacent to the side surface of the swivel key 171.

[0341] As FIG. 12A shown, an example in which the oil supply hole 472b penetrates the top surface of the ring body 173 to be adjacent to the left side surface of the swivel key 171 and is inclined at a predetermined angle is shown. Further, FIG. 13 An example in which the oil supply hole 472b is formed on the left side and the right side of the swivel key 171, respectively, so that the oil can flow in two directions is shown.

[0342] The oil stored in the cross ring accommodating portion 131a can flow from the bottom surface to the top surface of the cross ring 470 along the oil supply hole 472b when the cross ring 470 moves relative to the main frame 130, by the structure formed by the oil supply hole 472b obliquely formed in the ring body 173 and through the upper and lower ends of the ring body 173.

[0343] In addition, as the oil supply to the inclined oil supply groove 171a formed in the inner periphery of the orbit key accommodating portion 155 of the orbit scroll 150 in the up and down direction becomes more active, the oil supply to the orbit key 171 in contact with the inner periphery of the orbit key accommodating portion 155 becomes more smooth, the portion in contact with the oil in each face of the orbit key 171 increases, and thus the reliability can be improved.

[0344] Especially, in FIG. 12A In the cross ring 470 illustrated, since the inclined surface 473b and the oil supply hole 472b are parallel to each other, in the case where the cross ring 470 is slidably moved relative to the main frame 130, the oil at the bottom of the cross ring 470 can flow along the inclination of the end of the inclined surface 473b and the inclination angle of the oil supply hole 472b to the top surface of the ring body 173 in the moving direction.

[0345] As described above, the scroll compressor 100 of the present application can improve the actual load efficiency corresponding to the low pressure ratio operation by securing the low pressure ratio operation reliability through the structure in which the oil supply surface portion 473a having the inclined surface 473b is formed in the ring body 473 and the oil supply hole 472b is formed in the ring body 473.

[0346] On the other hand, referring to FIG. 7 , FIG. 8 and FIG. 12A The main key 175 can be further provided to the cross ring 470. In addition, the main key accommodating portion 131b capable of slidably inserting and accommodating the main key 175 can be provided to the main frame 130.

[0347] As an example, the main key 175 can be protruded downward from the opposite side bottom surface of the ring body 173 in which the orbit key 171 is formed. In addition, as illustrated in FIG. 7 and FIG. 8 The main key 175 can be spaced apart by 180 degrees and two are preferably alternately arranged in the circumferential direction at an interval of 90 degrees from the orbit key 171.

[0348] The main key 175 can be formed in a cuboid shape like the orbit key 171. In addition, the main key accommodating portion 131b can be formed in the main frame 130 in the radial direction to slidably accommodate the main key 175 in the radial direction, FIG. 7An example of a main key receiving portion 131b formed in a radial direction of the main frame 130 is shown, and an example in which the main key receiving portion 131b is formed in an elliptical long groove shape at the upper and lower portions is shown in the drawing.

[0349] On the other hand, with reference to FIG. 7 and FIG. 8 Support portions 477 can be provided between the two swirl keys 471 of the top surface of the ring body 473, and support portions 477 can also be provided between the two main keys 475 of the bottom surface of the ring body 473. The support portions 477 of the top surface of the ring body 473 can be in contact with the swirl scroll 150, and the support portions 477 of the bottom surface of the ring body 473 are in contact with the main frame 130. By providing the support portions 477 on the top and bottom surfaces of the ring body 473, respectively, the cross roller is supported between the main frame 130 and the swirl scroll 150 and is slidable.

[0350] The cross roller 470 is slidable in the main key receiving portion 131b by the main key 175 and the swirl key 471 is slidable in the swirl key receiving portion 155, which prevents the swirl scroll 150 from rotating.

[0351] Hereinafter, a lower compression type scroll compressor 200 in which a compression portion is disposed in a lower portion of a driving motor 220 in a scroll compressor 200 according to the present application will be described.

[0352] With reference to FIG. 14 , the scroll compressor 200 according to the present application includes a housing 210, a main frame 230, a rotating shaft 225, a swirl scroll 250, a fixed scroll 240, and a cross roller 570.

[0353] In addition, the cross roller 570 includes a ring body 573 and a key portion.

[0354] The ring body 573 is formed in a ring shape, is disposed between the main frame 230 and the swirl scroll 250, and is supported in an axial direction of the rotating shaft 225.

[0355] The key portion extends in an axial direction from the ring body 573 and is slidable inserted into a key receiving portion provided in the swirl scroll 250 or the main frame 230 or the fixed scroll 240.

[0356] The key portion can include a main key 575 as described below. In addition, the key portion can include a swirl key 571.

[0357] The key receiving portion can include a main key receiving portion 231b as described below. In addition, the key receiving portion can include a swirl key receiving portion 255 as described below.

[0358] An oil supply passage is provided in the ring body 173 or the key portion, and is configured to guide oil accumulated in a member supporting the ring body 173 toward between the key portion and the key receiving portion.

[0359] The oil supply passage can be at least one of the oil supply groove 171a, the oil supply hole 272b, and the oil supply surface portion 373a described later.

[0360] The plurality of scroll plates can be configured to engage with each other. In addition, the plurality of scroll plates include the orbiting scroll plate 250.

[0361] At least one of the scroll plates on one side in the orbiting scroll plate 250 is combined with the rotation shaft 225 and performs an orbiting motion.

[0362] The cross 570 is provided at an upper portion of the orbiting scroll plate 250, and is slidably combined with respect to the orbiting scroll plate 250, and guides the orbiting motion of the orbiting scroll plate 250.

[0363] The main frame 230 is provided at the opposite side of the orbiting scroll plate 250 across the cross 570, and receives the orbiting scroll plate 250 so as to be able to perform an orbiting motion.

[0364] At least one main key receiving portion 231b is provided in the main frame 230. In addition, at least one main key 575 is provided in the cross 570 so as to be slidably inserted into the main key receiving portion 231b.

[0365] In addition, an oil supply groove 575a is provided in at least one side surface of the main key 575 or at least one inner circumferential surface of the main key receiving portion 231b so as to be formed obliquely from a lower side to an upper side, so that oil can flow from a lower end to an upper end of the main key 575.

[0366] For the structure of the present application capable of more actively and directly supplying oil to the key of the cross 570, a more detailed description will be given later.

[0367] FIG. 14 is a cross-sectional view showing a lower compression type scroll compressor 200 of the present application.

[0368] Referring to FIG. 14 In the lower compression type scroll compressor 200 (hereinafter, simply referred to as a scroll compressor 200) of the present embodiment, a drive motor 220 constituting an electric portion is provided in an upper half of a housing 210, and a main frame 230, a fixed scroll plate 240, an orbiting scroll plate 250, and a discharge cover 260 are sequentially provided at a lower side of the drive motor 220. Generally, the drive motor 220 constitutes an electric portion, and the main frame 230, the fixed scroll plate 240, the orbiting scroll plate 250, and the discharge cover 260 constitute a compression portion.

[0369] The electric motor portion is coupled to the upper end of the rotary shaft 225, and the compression portion is coupled to the lower end of the rotary shaft 225. Thus, the compression portion forms the lower compression structure described above, and is connected to the electric motor portion by the rotary shaft 225 and operates by the rotational force of the electric motor portion.

[0370] Referring to FIG. 14 A driving motor 220, a main frame 230, a fixed scroll 240, a revolving scroll 250, and a discharge cover 260 are provided inside a housing 210 of the scroll compressor 200 of the present embodiment. The housing 210 can include a cylindrical case 211, an upper housing 212, and a lower housing 213. The cylindrical case 211 can have an open upper end and an open lower end, and the upper housing 212 can be coupled to cover the open upper end of the cylindrical case 211, and the lower housing 213 can be coupled to cover the open lower end of the cylindrical case 211.

[0371] Thus, the inside space 210a of the housing 210 is closed, and the closed inside space 210a of the housing 210 is divided into a lower space S1 and an upper space S2 with the driving motor 220 as a reference.

[0372] The lower space S1 is a space formed at the lower side of the driving motor 220, and the lower space S1 can be further divided into an oil storage space S11 and a discharge space S12 with the compression portion as a reference.

[0373] The oil storage space S11 is a space formed at the lower side of the compression portion, and forms a space for storing oil or mixed oil mixed with liquid refrigerant. The discharge space S12 is a space formed between the top surface of the compression portion and the bottom surface of the driving motor 220, and forms a space for discharging refrigerant or mixed refrigerant mixed with oil compressed by the compression portion.

[0374] The upper space S2 is a space formed at the upper side of the driving motor 220, and forms an oil separation space in which oil in the refrigerant discharged from the compression portion is separated. The upper space S2 is communicated with the refrigerant discharge pipe 216.

[0375] The driving motor 220 and the main frame 230 described above are inserted and fixed inside the cylindrical case 211. Oil recovery passages Po1, Po2 can be formed at the outer circumferential surfaces of the driving motor 220 and the main frame 230 at a predetermined interval from the inner circumferential surface of the cylindrical case 211. For this, the oil recovery passages will be described again later.

[0376] The refrigerant suction pipe 215 is coupled by penetrating the side surface of the cylindrical case 211. Thus, the refrigerant suction pipe 215 is coupled by penetrating the cylindrical case 211 forming the housing 210 in the radial direction.

[0377] Although not shown entirely in the drawings, the refrigerant suction pipe 215 is formed in an "L" shape, and one end thereof penetrates through the cylindrical housing 211 to directly communicate with a suction port 2421 of a fixed scroll plate 240 constituting a compression section. Thus, refrigerant can flow into the compression chamber V through the refrigerant suction pipe 215.

[0378] In addition, the other end of the refrigerant suction pipe 215 is connected to a reservoir (not shown) constituting a suction passage outside the cylindrical housing 211. The reservoir (not shown) is connected to an outlet side of an evaporator (not shown) through a refrigerant pipe. Thus, liquid refrigerant among refrigerant moving from the evaporator (not shown) to the reservoir (not shown) is separated in the reservoir (not shown), and then gaseous refrigerant is directly sucked into the compression chamber V through the refrigerant suction pipe 215.

[0379] A terminal bracket (not shown) in which terminals (not shown) for transmitting an external power source to the drive motor 220 can be penetrated and combined is incorporated in the upper half or upper housing 212 of the cylindrical housing 211.

[0380] An inner side end 216a of the refrigerant discharge pipe 216 penetrates and is combined to an upper portion of the upper housing 212, and is combined to communicate with the inner space 210a of the housing 210, particularly, an upper space S2 formed on an upper side of the drive motor 220.

[0381] The refrigerant discharge pipe 216 is a passage through which compressed refrigerant discharged from the compression section to the inner space 210a of the housing 210 is externally discharged toward a condenser (not shown). The refrigerant discharge pipe 216 can be disposed on the same axis as the rotating shaft 225 described later. Thus, the venturi 291 described later disposed in parallel with the refrigerant discharge pipe 216 can be eccentrically disposed with respect to the axis center of the rotating shaft 225.

[0382] An oil separation device (not labeled) for separating oil from refrigerant discharged from the compressor 200 to the condenser can be provided in the refrigerant discharge pipe 216, or a check valve (not labeled) for blocking refrigerant discharged from the compressor 200 from being again inversely flowed to the compressor 200 can be provided.

[0383] One end portion of an oil circulation pipe (not shown) can be radially penetrated and combined to a lower half of the lower housing 213. The oil circulation pipe is open at both ends, and the other end thereof can be penetrated and combined to the refrigerant suction pipe 215. An oil circulation valve (not shown) can be provided in the middle of the oil circulation pipe.

[0384] The oil circulation valve can be opened and closed according to the amount of oil stored in the oil storage space S11 or according to a set condition. For example, the oil circulation valve can be opened at the initial stage of operation of the compressor to circulate the oil stored in the oil storage space to the compression section through the suction refrigerant pipe, and the oil circulation valve can be closed to prevent excessive outflow of oil in the compressor during normal operation of the compressor.

[0385] Hereinafter, a description will be given of the operation of the oil circulation valve 230. FIG. 14 A description will be given of the driving motor 220 constituting the motor portion. The driving motor 220 of the present embodiment includes a stator 221 and a rotor 222. The stator 221 is inserted and fixed to the inner circumferential surface of the cylindrical housing 211, and the rotor 222 is rotatably provided inside the stator 221.

[0386] The stator 221 includes a stator core 2211 and a stator coil 2212.

[0387] The stator core 2211 is formed in a ring shape or a hollow cylindrical shape, and is fixed to the inner circumferential surface of the cylindrical housing 211 in a shrink fit manner.

[0388] A rotor accommodating portion 2211a, which is penetrated in a circular shape, is formed in the central portion of the stator core 2211, and the rotor 222 is rotatably inserted into the rotor accommodating portion 2211a. A plurality of stator-side oil recovery grooves 2211b, which are cut or recessed in a D-cut pattern along the axial direction, can be formed in the outer circumferential surface of the stator core 2211 at a predetermined interval in the circumferential direction.

[0389] A plurality of teeth (not shown) and grooves (not shown) can be alternately formed in the inner circumferential surface of the rotor accommodating portion 2211a in the circumferential direction, and the stator coil 2212 is wound around each tooth through the grooves on both sides of the tooth.

[0390] More specifically, the grooves can be spaces between the stator coils adjacent in the circumferential direction. In addition, the grooves form an inner passage 220a, and a gap passage 220b will be formed between the inner circumferential surface of the stator core 2211 and the outer circumferential surface of the rotor core 2221 described later, and an oil recovery groove 2211d forms an outer passage 220c. The inner passage 220a and the gap passage 220b form passages through which the refrigerant discharged from the compression section moves to the upper space S2, and the outer passage 220c forms a first oil recovery passage Po1 through which the oil separated from the upper space S2 is recovered to the oil storage space S11.

[0391] The stator coil 2212 is wound around the stator core 2211, and is electrically connected to an external power source through a terminal (not shown) penetratingly coupled to the housing 210. An insulator 2213 as an insulating member is inserted between the stator core 2211 and the stator coil 2212.

[0392] The insulator 2213 can be provided at the inner and outer circumferential sides of the stator core 2211 to extend to both sides in the axial direction of the stator core 2211 to accommodate the wire harness of the stator coil 2212 in the radial direction.

[0393] The rotor 222 includes a rotor core 2221 and permanent magnets 2222.

[0394] The rotor core 2221 is formed in a cylindrical shape and is accommodated in a rotor accommodation portion 2211a formed in the central portion of the stator core 2211.

[0395] Specifically, the rotor core 2221 is rotatably inserted into the rotor accommodation portion 2211a of the stator core 2211 with a predetermined gap 220a therebetween. The permanent magnets 2222 are embedded in the inside of the rotor core 2221 at a predetermined interval in the circumferential direction.

[0396] A balance weight 223 can be coupled to the lower end of the rotor core 2221. However, the balance weight 223 can also be coupled to the main shaft portion 2251 of the rotating shaft 225, which will be described later. In the present embodiment, the case in which the balance weight 223 is coupled to the rotating shaft 225 will be mainly described. The balance weights 223 are provided at the lower end side and the upper end side of the rotor, respectively, and are symmetrical to each other.

[0397] The rotating shaft 225 is coupled to the center of the rotor core 2221. The upper end portion of the rotating shaft 225 is press-fitted and coupled to the rotor 222, and the lower end portion of the rotating shaft 225 is rotatably inserted into the main frame 230 and is supported in the radial direction.

[0398] The main bearing 271 composed of a bush bearing is provided in the main frame 230 to support the lower end portion of the rotating shaft 225. Thus, the portion of the lower end portion of the rotating shaft 225 that is inserted into the main frame 230 can smoothly rotate inside the main frame 230.

[0399] The rotating shaft 225 transmits the rotational force of the drive motor 220 to the orbiting scroll 250 that constitutes the compression portion. Thus, the orbiting scroll 250 eccentrically coupled to the rotating shaft 225 performs an orbiting motion with respect to the fixed scroll 240.

[0400] Referring to FIG. 14 The rotating shaft 225 of the present embodiment includes a main shaft portion 2251, a first supported portion 2252, a fixed supported portion 2253, and an eccentric portion 2254.

[0401] The main shaft portion 2251 is an upper side portion of the rotating shaft 225 and is formed in a cylindrical shape. A portion of the main shaft portion 2251 can be press-fitted and coupled to the rotor core 2221.

[0402] The first supported portion 2252 is a portion extending from the lower end of the main shaft portion 2251. The first supported portion 2252 can be inserted into the main bearing hole 2331 of the main frame 230 and be supported in the radial direction.

[0403] The fixed supported portion 2253 refers to the lower side portion of the rotation shaft 225. The fixed supported portion 2253 can be inserted into the sub bearing hole 2431 of the fixed scroll 240 and be supported in the radial direction. The central axis of the fixed supported portion 2253 and the central axis of the first supported portion 2252 can be aligned on the same line. That is, the first supported portion 2252 and the fixed supported portion 2253 can have the same central axis.

[0404] The eccentric portion 2254 is formed between the lower end of the first supported portion 2252 and the upper end of the fixed supported portion 2253. The eccentric portion 2254 can be inserted and coupled to the rotation shaft coupling portion 253 of the orbiting scroll 250 described later.

[0405] The eccentric portion 2254 can be formed eccentrically with respect to the first supported portion 2252 and the fixed supported portion 2253 in the radial direction. That is, the central axis of the eccentric portion 2254 can be formed eccentrically with respect to the central axis of the first supported portion 2252 and the central axis of the fixed supported portion 2253. Thereby, when the rotation shaft 225 rotates, the orbiting scroll 250 can perform an orbiting motion with respect to the fixed scroll 240.

[0406] On the other hand, a hollow-shaped oil supply passage 226 for supplying oil to the first supported portion 2252, the fixed supported portion 2253, and the eccentric portion 2254 can be formed in the inside of the rotation shaft 225. The oil supply passage 226 includes an internal oil passage 2261 formed in the inside of the rotation shaft 225 in the axial direction.

[0407] As the compression portion is located at a lower side position than the motor portion, the internal oil passage 2261 can be formed by being slotted from the lower end of the rotation shaft 225 to the lower end or the intermediate height of the stator 221, or to a position higher than the upper end of the first supported portion 2252. However, in an embodiment not shown, the internal oil passage 2261 can also be formed in the axial direction through the rotation shaft 225.

[0408] An oil suction device 227 for pumping oil filled in the oil storage space S11 can be coupled to the lower end of the rotation shaft 225, that is, the lower end of the fixed supported portion 2253. The oil suction device 227 can be composed of an oil supply tube 2271 inserted and coupled to the internal oil passage 2261 of the rotation shaft 225, and a blocking member 2272 for blocking foreign matter from being introduced by accommodating the oil supply tube 2271. The oil supply tube 2271 can extend downward to penetrate the discharge cover 260 and be immersed in the oil of the oil storage space S11.

[0409] A plurality of oil supply holes can be formed in the rotating shaft 225, and the plurality of oil supply holes communicate with the internal oil passage 2261 to guide oil moving upward along the internal oil passage 2261 to the first supported portion 2252, the fixed supported portion 2253, and the eccentric portion 2254.

[0410] Referring to FIG. 14 , the compression portion of the present embodiment includes a main frame 230, a fixed scroll 240, a revolving scroll 250, a discharge cover 260, and a flow path guide 280. FIG. 14

[0411] The main frame 230 includes a frame end plate portion 231, a frame side wall portion 232, and a main bearing portion 23.

[0412] The frame end plate portion 231 is formed in a ring shape and is disposed on the lower side of the drive motor 220. The frame side wall portion 232 extends in a cylindrical shape from the lower side surface edge of the frame end plate portion 231, and the outer peripheral surface of the frame side wall portion 232 is fixed or fused in a thermal sleeve manner to the inner peripheral surface of the cylindrical housing 211. Thus, the oil storage space S11 and the discharge space S12 constituting the lower space S1 of the housing 210 are separated by the frame end plate portion 231 and the frame side wall portion 232.

[0413] In addition, referring to FIG. 14 and FIG. 15 , a cross ring accommodating portion 231a can be formed in the bottom surface of the frame end plate portion 231, and a main key accommodating portion 231b is formed in the cross ring accommodating portion 231a. The main key accommodating portion 231b formed in the cross ring accommodating portion 231a can be formed in two at a phase difference of substantially 180° from each other in the circumferential direction. The main key accommodating portion 231b can be formed as a groove having a predetermined depth and width, and can slidably accommodate the main key 575.

[0414] In FIG. 1 and the like, the aforementioned upper compression type scroll compressor 200 has a structure in which the main frame 230, the revolving scroll 250, and the fixed scroll 240 are sequentially disposed above the drive motor 220, and thus the cross ring accommodating portion 231a is formed in the top surface of the main frame 230.

[0415] On the other hand, FIG. 14 , the lower compression type scroll compressor 200 has a structure in which the main frame 230, the revolving scroll 250, and the fixed scroll 240 are sequentially disposed below the drive motor 220, and thus the cross ring accommodating portion 231a is disposed in the bottom surface of the main frame 230 since the main frame 230 is disposed in an inverted manner compared to the upper compression type scroll compressor 200.

[0416] ​As an example, the cross ring accommodating portion 231a can be formed in a ring shape to accommodate the cross ring 570 in a ring shape. Preferably, the width of the ring shape of the cross ring accommodating portion 231a is greater than the width of the ring body 573 of the cross ring 570, so that the cross ring 570 can be accommodated without interference.

[0417] On the other hand, unlike the upper compression scroll compressor 100, in the lower compression scroll compressor 200, the cross ring accommodating portion 231a is disposed at the upper portion of the cross ring 570, and thus the oil sucked from the oil storage space cannot be accommodated in the cross ring accommodating portion 231a, so that the oil can be supplied to the oil supply groove 575a and the oil supply hole 572b of the cross ring 570 through the space between the main frame 230 and the orbiting scroll 250.

[0418] The main key accommodating portion 231b can be formed in a radial direction intersecting the circumferential direction of the ring body 573 of the cross ring 570 with respect to the cross ring accommodating portion 231a. As will be described later, the cross ring 570 can slide in the radial direction in which the main key accommodating portion 231b is formed, by being accommodated in and moved by the main key 575 of the main key accommodating portion 231b.

[0419] Preferably, the length of the main key accommodating portion 231b is greater than the length of the main key 575 in the direction in which the main key 575 of the cross ring 570 slides, so that the main key 575 can move by a predetermined distance.

[0420] The main key 575 of the cross ring 570, which will be described later, can be slidably inserted into the main key accommodating portion 231b in the radial direction. In this case, a liner constituting an anti-wear member can be inserted into the main key accommodating portion 231b, or the main key 575 of the cross ring 570 inserted into the main key accommodating portion 231b can be formed of a different material from the ring body 573 of the cross ring 570.

[0421] For example, in the case where the main frame 230 is formed of the same material as the main key 575 of the cross ring 570, a liner formed of a different material from the main frame 230 or the cross ring 570 can be provided to be able to suppress wear between the main frame 230 and the cross ring 570. Alternatively, the main key 575 can be assembled to the ring body 573 constituting the cross ring 570 after, and the main key 575 can be formed of a different material from the main frame 230. However, as in the present embodiment, in the case where the main frame 230 and the ring body 573 of the cross ring 570 are formed of different materials from each other (for example, the main frame 230 is cast iron, and the first key of the cross ring 570 is an aluminum material), there is no need to provide an additional liner in the main key accommodating portion 231b.

[0422] A scroll key accommodating portion 255 can be formed on the side surface of the scroll end plate portion 251, that is, the opposite side surface of the scroll scroll portion 253, and a scroll key 571, which constitutes a part of a cross ring 570 described later, can be accommodated in the scroll key accommodating portion 255. The scroll keys 571 can be provided at a phase difference of substantially 180° from each other in the circumferential direction.

[0423] In the scroll compressor 200 of the lower compression method, the scroll key 571 or the scroll key accommodating portion 255 is not formed with an oil supply groove 575a capable of allowing oil to flow to the scroll key 571. On the other hand, the main key 575 or the main key accommodating portion 231b is formed with an oil supply groove 231c.

[0424] The structure in which the main key 575 or the main key accommodating portion 231b is formed with the oil supply groove 575a, 231c will be described again later together with the cross ring 570.

[0425] The frame side wall portion 232 can be formed with a frame discharge hole (hereinafter, referred to as a second discharge hole) 2321, which constitutes a part of a discharge passage, through the frame side wall portion 232 in the axial direction. The second discharge hole 2321 is formed in correspondence with a scroll plate discharge hole (first discharge hole) 2422 of the fixed scroll plate 240 described later, and constitutes a refrigerant discharge passage (not shown) together with the first discharge hole 2422.

[0426] The second discharge hole 2321 can be formed long in the circumferential direction or a plurality of second discharge holes 2321 can be formed at a predetermined interval from each other in the circumferential direction. Thereby, the second discharge hole 2321 ensures a discharge area while maintaining a radial width to the minimum, so that the volume of the compression chamber can be ensured with the same diameter of the main frame 230. The first discharge hole 2422 provided to the fixed scroll plate 240 to form a part of the discharge passage can also be formed similarly.

[0427] A discharge guide groove 2322, which accommodates a plurality of second discharge holes 2321, can be formed on the top surface of the frame end plate portion 231, that is, the upper end of the second discharge hole 2321. The discharge guide groove 2322 can be formed in one or more depending on the formation position of the second discharge hole 2321. For example, in the case where the second discharge hole 2321 is composed of three groups, the discharge guide groove 2322 can be formed by three discharge guide grooves 2322 to accommodate the second discharge holes 2321 composed of three groups, respectively. The three discharge guide grooves 2322 can be formed in the same line in the circumferential direction.

[0428] The discharge guide groove 2322 can be formed wider than the second discharge hole 2321. For example, the second discharge hole 2321 can be formed on the same line as the first oil recovery groove 2323, which will be described later, in the circumferential direction. Therefore, in the case where the flow path guide 280 is provided, the second discharge hole 2321, which has a smaller cross-sectional area, will not easily be positioned inside the flow path guide 280. In this regard, the discharge guide groove 2322 is formed at the end portion of the second discharge hole 2321, and the inner peripheral side of the discharge guide groove 2322 can be expanded to the inside of the flow path guide 280 in the radial direction.

[0429] Thus, by forming the second discharge hole 2321 to have a smaller inner diameter, while being formed near the outer peripheral surface of the frame 230, it is possible to prevent the second discharge hole 2321 from being repelled to the outside of the flow path guide 280, that is, to the outer peripheral surface side of the stator 221, by the flow path guide 280.

[0430] The outer peripheral surface of the frame end plate portion 231 and the outer peripheral surface of the frame side wall portion 232, which constitute the outer peripheral surface of the main frame 230, can be formed with a frame oil recovery groove (hereinafter referred to as a first oil recovery groove) 2323, which constitutes a part of the second oil recovery passage Po2, formed therethrough in the axial direction. The first oil recovery groove 2323 can be formed only one, or can be formed at a predetermined interval from each other in the circumferential direction along the outer peripheral surface of the main frame 230. Thus, the discharge space S12 of the housing 210 will be communicated with the oil storage space S11 of the housing 210 through the first oil recovery groove 2323.

[0431] The first oil recovery groove 2323 is formed in correspondence with a scroll plate oil recovery groove (hereinafter referred to as a second oil recovery groove) 2423 of the fixed scroll plate 240, which will be described later, and forms the second oil recovery passage together with the second oil recovery groove 2423 of the fixed scroll plate 240.

[0432] The main bearing accommodation portion 233 is protruded upward from the center portion top surface of the frame end plate portion 231 toward the drive motor 220. The main bearing accommodation portion 233 is formed with a main bearing hole 2331, which is formed in a cylindrical shape through in the axial direction, and the first supported portion 2252 of the rotating shaft 225 is inserted into the main bearing hole 2331 and is supported in the radial direction.

[0433] Hereinafter, the fixed scroll plate 240 will be described with reference to FIG. 14 The fixed scroll plate 240 of the present embodiment can include a fixed end plate portion 241, a fixed side wall portion 242, a sub bearing portion 243, and a fixed scroll portion 244.

[0434] The fixed end plate portion 241 is formed in a disc shape having a plurality of recesses formed in the outer peripheral surface, and a sub bearing hole 2431 constituting a sub bearing portion 243 described later can be formed through the center of the fixed end plate portion 241 in the up-down direction. A discharge port 2411, 1412 communicating with the discharge pressure chamber Vd can be formed in the periphery of the sub bearing hole 2431, and the refrigerant compressed in the discharge pressure chamber Vd is discharged to the discharge space S12 of the discharge cover 260 through the discharge port 2411, 1412.

[0435] Although not shown, the discharge port can be formed with only one and communicate with both the first compression chamber V1 and the second compression chamber V2 described later. However, as described in the present embodiment, the first compression chamber V1 can communicate with a first discharge port (not shown), and the second compression chamber V2 can communicate with a second discharge port (not shown). Thus, the refrigerant compressed in the first compression chamber V1 and the second compression chamber V2 can be independently discharged through different discharge ports.

[0436] The fixed side wall portion 242 can extend in the up-down direction from the top surface edge of the fixed end plate portion 241 to form a ring shape. The fixed side wall portion 242 can be coupled in a manner facing the frame side wall portion 232 of the main frame 230 in the up-down direction.

[0437] The fixed side wall portion 242 can have a scroll discharge hole (hereinafter referred to as a first discharge hole) 2422 formed therethrough in the axial direction. The first discharge hole 2422 can be formed long in the circumferential direction or a plurality of first discharge holes 2422 can be formed at a predetermined interval from each other in the circumferential direction. Thus, the first discharge hole 2422 ensures the discharge area while maintaining the radial width to the minimum, thereby being able to ensure the compression chamber volume with the same diameter of the fixed scroll 240.

[0438] In the state in which the fixed scroll 240 is coupled to the cylindrical housing 211, the first discharge hole 2422 communicates with the second discharge hole 2321 described above. Thus, the first discharge hole 2422 forms a refrigerant discharge passage together with the second discharge hole 2321 described above.

[0439] A second oil recovery groove 2423 can be formed in the outer peripheral surface of the fixed side wall portion 242. The second oil recovery groove 2423 communicates with the first oil recovery groove 2323 provided in the main frame 230 and guides the oil recovered through the first oil recovery groove 2323 to the oil storage space S11. Thus, the first oil recovery groove 2323 and the second oil recovery groove 2423 form a second oil recovery passage Po2 together with the oil recovery groove 2612 of the discharge cover 260 described later.

[0440] An intake port 2421 that penetrates the fixed side wall portion 242 in the radial direction is formed in the fixed side wall portion 242. An end portion of a refrigerant intake pipe 215 that penetrates the cylindrical housing 211 is inserted into the intake port 2421. Thus, refrigerant can flow into the compression chamber V through the refrigerant intake pipe 215.

[0441] A sub-bearing portion 243 extends from the center portion of the fixed end plate portion 241 in the axial direction toward the discharge cover 260. A cylindrical sub-bearing hole 2431 that penetrates in the axial direction is formed in the center of the sub-bearing portion 243, and the fixed supported portion 2253 of the rotary shaft 225 can be inserted into the sub-bearing hole 2431 and supported in the radial direction. Thus, the lower end (or the fixed supported portion) of the rotary shaft 225 is inserted into the sub-bearing portion 243 of the fixed scroll 240 and supported in the radial direction, and the eccentric portion 2254 of the rotary shaft 225 can be supported in the axial direction on the top surface of the fixed end plate portion 241 that constitutes the periphery of the sub-bearing portion 243.

[0442] A fixed scroll portion 244 can be formed so as to extend in the axial direction from the top surface of the fixed end plate portion 241 toward the orbiting scroll 250. The fixed scroll portion 244 forms the compression chamber V by engaging with the orbiting scroll portion 252 described later. The fixed scroll portion 244 will be described later together with the orbiting scroll portion 252.

[0443] Next, the orbiting scroll 250 will be described with reference to FIG. 14 The orbiting scroll 250 of the present embodiment includes an orbiting end plate portion 251, an orbiting scroll portion 252, and a rotary shaft coupling portion 253.

[0444] The orbiting end plate portion 251 is formed in a disc shape and accommodated in the main frame 230. The top surface of the orbiting end plate portion 251 can be supported in the axial direction by a back pressure seal member (not shown) from the main frame 230.

[0445] A face opposite to the orbiting scroll portion 253 of one face of the orbiting end plate portion 251 can be provided with an orbiting key 571 that constitutes a part of a cross roller 570 described later. The orbiting key 571 can be provided with two at a phase difference of substantially 180° in the circumferential direction from each other in the cross roller 570.

[0446] Referring to FIG. 14 and FIG. 15 , an example in which the cross roller 570 is provided on the top surface of the orbiting end plate portion 251 is shown.

[0447] The orbiting key 571 can extend in the axial direction toward the cross roller 570 to be slidably inserted in the orbiting key accommodating portion 255 of the cross roller 570 described later in the radial direction. The orbiting key 571 will be described again later together with the cross roller 570.

[0448] The scroll wrap 252 can be formed to extend from a bottom surface of the scroll end plate 251 toward the fixed scroll 240. The scroll wrap 252 forms the compression chamber V by engaging with the fixed scroll wrap 244.

[0449] The scroll wrap 252 can be formed in an involute shape together with the fixed scroll wrap 244. However, the scroll wrap 252 and the fixed scroll wrap 244 can also be formed in various shapes other than the involute shape.

[0450] For example, the scroll wrap 252 can have a shape in which a plurality of circular arcs having different diameters and different circle points are connected to each other, and an outermost contour is formed in a substantially elliptical shape having a major axis and a minor axis. The fixed scroll wrap 244 can also be formed in the same manner.

[0451] An inner side end portion of the scroll wrap 252 is formed at a central portion of the scroll end plate 251, and the rotation shaft coupling portion 253 can be formed to penetrate the central portion of the scroll end plate 251 in the axial direction.

[0452] The eccentric portion 2254 of the rotation shaft 225 is rotatably inserted and coupled to the rotation shaft coupling portion 253. Thereby, an outer circumferential portion of the rotation shaft coupling portion 253 is coupled to the scroll wrap 252, and functions to form the compression chamber V together with the fixed scroll wrap 244 during compression.

[0453] The rotation shaft coupling portion 253 can be formed at a height at which the scroll wrap 252 overlaps in the same plane. That is, the rotation shaft coupling portion 253 can be disposed at a height at which the eccentric portion 2254 of the rotation shaft 225 overlaps the scroll wrap 252 in the same plane. Accordingly, the reaction force and the compression force of the refrigerant are applied to each other based on the scroll end plate 251 in the same plane, so that tilting of the scroll 250 due to the compression force and the reaction force can be suppressed.

[0454] The rotation shaft coupling portion 253 can be provided with a coupling side portion 253a that supports the scroll bearing 273 by contacting an outer circumference of the scroll bearing 273.

[0455] In addition, the rotation shaft coupling portion 253 can further include a coupling end portion (not shown) that supports the scroll bearing 273 by contacting one end of the scroll bearing 273.

[0456] On the other hand, the compression chamber V is formed in the space comprised of the fixed end plate portion 241 and the fixed scroll portion 244, as well as the rotating end plate portion 251 and the rotating scroll portion 252. Furthermore, based on the fixed scroll portion 244, the compression chamber V can be composed of a first compression chamber V1 formed between the inner surface of the fixed scroll portion 244 and the outer surface of the rotating scroll portion 252, and a second compression chamber V2 formed between the outer surface of the fixed scroll portion 244 and the inner surface of the rotating scroll portion 252.

[0457] The cross ring 570 can be disposed between the main frame 230 and the swirling scroll 250. Of course, depending on the circumstances, the cross ring 570 can also be disposed between the fixed scroll 240 and the swirling scroll 250. However, in this invention, the example of the cross ring 570 being disposed between the main frame 230 and the swirling scroll 250 will be mainly described.

[0458] For example, the cross ring 570 can be slidably attached to both the main frame 230 and the vortex disk 250. Thus, the cross ring 570 restricts the rotation of the vortex disk 250, causing the vortex disk 250 to rotate relative to the main frame 230. The cross ring 570 will be described in more detail later.

[0459] Below, refer to FIG. 14 The dispensing cap 260 is described below. The dispensing cap 260 includes a cap housing portion 261 and a cap flange portion 262.

[0460] The cover housing portion 261 forms a cover space portion 2611 inside, which together with the bottom surface of the fixed vortex disk 240 constitutes the discharge space S3.

[0461] The outer peripheral surface of the cover housing portion 261 is in close contact with the inner peripheral surface of the outer casing 210, and a portion of it is spaced out in the circumferential direction to form an oil recovery groove 2612. This oil recovery groove 2612, together with the oil recovery groove 2621 provided on the outer peripheral surface of the cover flange portion 262, constitutes a third oil recovery groove. The third oil recovery groove of the ejector cover 260, together with the first oil recovery groove of the aforementioned main frame 230 and the second oil recovery groove of the fixed scroll plate 240, forms a second oil recovery passage Po2.

[0462] At least one discharge hole receiving groove 2613 may be formed circumferentially on the inner peripheral surface of the cover housing portion 261. The discharge hole receiving groove 2613 is formed radially recessed outward, and the first discharge hole 2422 of the fixed scroll plate 240 constituting the discharge passage may be located inside the discharge hole receiving groove 2613. As a result, the inner surface of the cover housing portion 261, excluding the discharge hole receiving groove 2613, will be in close contact with the outer peripheral surface of the fixed scroll plate 240, i.e., the outer peripheral surface of the fixed end plate portion 241, to form a sealing portion.

[0463] The entire circumferential angle of the discharge hole receiving groove 2613 can be less than or equal to the entire circumferential angle of the inner circumferential surface of the discharge space S3, excluding the discharge hole receiving groove 2613. This ensures not only a sufficient sealing area of ​​the inner circumferential surface of the discharge space S3, excluding the discharge hole receiving groove 2613, but also ensures the circumferential length of the cover flange 262 can be formed.

[0464] The cover flange 262 can be formed radially from the outer peripheral surface of the portion constituting the sealing portion, i.e., the portion in the upper end face of the cover housing portion 261 other than the discharge hole receiving groove 2613.

[0465] The flange portion 262 has fastening holes (not marked) for securing the ejector cap 260 to the fixed scroll plate 240 with bolts. Between the fastening holes are a plurality of oil recovery grooves 2621 formed at predetermined intervals along the circumferential direction. These oil recovery grooves 2621 are radially recessed. This oil recovery groove, together with the oil recovery groove 2612 of the aforementioned cap housing portion 261, forms a third oil recovery groove.

[0466] Reference FIG. 1 The flow path guide 280 is disposed between the electric section and the compression section, for example, in the discharge space S12. Specifically, the flow path guide 280 may be disposed at the upper end of the main frame 230 facing the lower end of the drive motor 220.

[0467] The flow path guide 280 separates the discharge space S12 into a refrigerant discharge flow path and an oil recovery flow path. As a result, the refrigerant discharged from the compressor into the discharge space S12 moves to the upper space S2 through the internal passage 220a and the void passage 220b, while the oil separated from the refrigerant in the upper space S2 can be recovered to the oil storage space S11 through the external passage 220c.

[0468] The flow path guide 280 can be formed as a ring or as a plurality of arc shapes. The following description focuses on an example where the flow path guide 280 is formed as a ring, but the basic structure and corresponding effect for separating the refrigerant and oil are similar even when it is formed as a plurality of arc shapes.

[0469] For example, the flow path guide 280 may include a bottom part, an outer wall part, and an inner wall part.

[0470] The bottom part is formed into a ring and fixed to the top surface of the main frame 230. A discharge passage housing part extends radially on the outer peripheral surface of the bottom part, and the discharge through hole can penetrate the discharge passage housing part and overlap with the discharge guide groove of the main frame 230.

[0471] The outer wall portion extends from the approximately outer circumferential surface of the bottom surface portion toward the insulator 2213. The outer wall portion can be inserted into the inside or outside of the insulator 2213 and overlap the insulator 2213. The outer wall portion can be formed in a ring shape extending in the circumferential direction, or can be formed in a circular arc shape.

[0472] In the case where the outer wall portion is formed in a ring shape, the diameter of the outer wall portion can be smaller than or larger than the diameter of the insulator 2213, or the upper end of the outer wall portion can be spaced apart from the lower end of the insulator 2213. Thereby, a gap is generated between the outer wall portion and the insulator 2213, and thus the refrigerant (liquid refrigerant) discharged to the inside of the outer wall portion can move to the outside space S12b where the second end of the liquid refrigerant discharge pipe 292 is located, and thus the liquid refrigerant can be rapidly discharged to the outside of the compressor by the liquid refrigerant discharge unit 190.

[0473] Although not illustrated, in the case where a communication passage such as a gap is not formed between the ring-shaped outer wall portion and the insulator 2213, a communication groove (not illustrated) that communicates the inside space S12a and the outside space S12b can be formed in the bottom surface portion or the top surface of the main frame 230 facing the same.

[0474] The inner wall portion extends from the approximately inner circumferential surface of the bottom surface portion toward the insulator 2213. The inner wall portion can extend in the axial direction, or can be bent to surround the balance weight 223 and extend as illustrated.

[0475] As described above, the scroll compressor 200 of the present embodiment is FIG. 14 The scroll compressor 200 of the present embodiment is a lower portion compression scroll compressor in which a compression portion as illustrated is disposed in the lower portion of the drive motor 220.

[0476] The scroll compressor 200 of the present embodiment as described above operates in the following manner.

[0477] That is, if power is applied to the drive motor 220, the rotor 222 and the rotating shaft 225 generate a rotational force to rotate, and the orbiting scroll 250 eccentrically coupled to the rotating shaft 225 performs an orbiting motion with respect to the fixed scroll 240 through the cross ring 570.

[0478] Thereby, the volume of the compression chamber V becomes smaller from the suction pressure chamber Vs formed on the outside of the compression chamber V to the intermediate pressure chamber Vm and the discharge pressure chamber Vd formed on the central side in succession.

[0479] Thereby, the refrigerant moves to a condenser (not illustrated), an expander (not illustrated), and an evaporator (not illustrated) of a refrigeration cycle, and then moves to a liquid reservoir (not illustrated), and the refrigerant moves to the suction pressure chamber Vs side of the compression chamber V through the refrigerant suction pipe 215.

[0480] Thus, the refrigerant sucked into the suction pressure chamber Vs moves along the movement track of the compression chamber V to the discharge pressure chamber Vd via the intermediate pressure chamber Vm and is compressed, and the compressed refrigerant is discharged from the discharge pressure chamber Vd to the discharge space S12 of the discharge cover 260 through the discharge ports 2411, 1412.

[0481] Thus, the refrigerant (mixed refrigerant with oil. However, in the explanation, it can be mixed as mixed refrigerant or refrigerant) discharged to the discharge space S12 of the discharge cover 260 moves to the discharge space S12 formed between the main frame 230 and the drive motor 220 through the discharge hole accommodation groove 2613 of the discharge cover 260 and the first discharge hole 2422 of the fixed scroll 240. The mixed refrigerant moves to the upper space S2 of the housing 210 formed above the drive motor 220 through the drive motor 220.

[0482] The mixed refrigerant moved to the upper space S2 is separated into refrigerant and oil in the upper space S2, and the refrigerant (or a part of the mixed refrigerant not separated into oil) is discharged to the outside of the housing 210 through the refrigerant discharge pipe 216 and then moves to the condenser of the refrigeration cycle.

[0483] On the other hand, the oil (or mixed oil mixed with liquid refrigerant) separated from the refrigerant in the upper space S2 moves to the lower space S1 through the first oil recovery passage Po1 between the inner circumferential surface of the housing 210 and the stator 221, and the oil moved to the lower space S1 is recovered to the oil storage space S11 formed in the lower part of the compression part through the second oil recovery passage Po2 formed between the inner circumferential surface of the housing 210 and the outer circumferential surface of the compression part.

[0484] The oil is supplied to each bearing surface (not marked) through the oil supply passage 226, and a part of the oil is supplied to the compression chamber V.

[0485] In addition, as the oil is supplied between the main frame 230 and the orbiting scroll 250, and the oil supply is directed to the top surface of the ring body 573, the oil supply to the inclined oil supply groove 575a formed in the upper and lower directions on one side of the main key 575 of the cross ring 570 becomes more active, the portion of each side of the main key 575 in contact with the oil increases, and thus the reliability can be improved.

[0486] The oil supplied to the bearing surface and the compression chamber V will repeatedly go through a series of processes of being recovered after being discharged to the discharge cover 260 together with the refrigerant.

[0487] At this time, as the flow path guide 280 that separates the refrigerant discharge passage and the oil recovery passage is provided between the lower end of the drive motor 220 constituting the discharge space S12 and the upper end of the main frame 230, the refrigerant discharged from the compression part and moved to the upper space S2 and the oil moved from the upper space S2 to the lower space S1 can be inhibited from mixing with each other.

[0488] The scroll compressor 200 of the present application includes a plurality of scroll plates, a cross ring 570, and a main frame 230.

[0489] The plurality of scroll plates are configured to engage with each other. In addition, the plurality of scroll plates include a revolving scroll plate 250.

[0490] At least one of the scroll plates in the revolving scroll plate 250 is combined with the rotating shaft 225 and performs a revolving motion.

[0491] In addition, the plurality of scroll plates can further include the aforementioned fixed scroll plate 240.

[0492] The cross ring 570 is disposed at an upper portion of the revolving scroll plate 250 and is slidably combined with respect to the revolving scroll plate 250, which guides the revolving motion of the revolving scroll plate 250.

[0493] The main frame 230 is disposed at opposite sides of the revolving scroll plate 250 across the cross ring 570 and accommodates the revolving scroll plate 250 so as to be able to perform a revolving motion.

[0494] At least one main key accommodating portion 231b is provided at the main frame 230. In addition, at least one main key 575 is provided at the cross ring 570 so as to be slidably inserted into the main key accommodating portion 231b.

[0495] In addition, an oil supply groove 575a is provided at at least one side surface of the main key 575 or at least one inner circumferential surface of the main key accommodating portion 231b so as to be inclined from a lower side to an upper side, so that oil is able to flow from a lower end to an upper end of the main key 575.

[0496] In other words, the oil supply groove 575a can be provided at at least one side surface of the main key 575, or the oil supply groove 231c can be provided at at least one inner circumferential surface of the main key accommodating portion 231b.

[0497] The oil supply groove 575a, 231c is formed at the main key 575 or the main key accommodating portion 231b and is able to cause oil to flow from a lower end to an upper end of the main key 575.

[0498] In addition, as will be described later, the scroll compressor 200 of the present application is able to improve reliability by applying the oil supply surface portion 773a having the inclined surface 773b and the oil supply groove 575a structure, so that oil is more smoothly supplied to the main key 575 as the cross ring 570 moves.

[0499] In addition, the scroll compressor 200 of the present application applies the inclined oil supply hole 672b and applies the oil supply groove 575a to the main key 575, so that oil is more smoothly supplied to the main key 575 as the cross ring 570 moves, and thus is able to improve reliability.

[0500] The main key housing 231b is located on the main frame 230, and the main key 575 is located on the cross ring 570.

[0501] The key slidably inserted into the main frame 230 from the key in the cross ring 570 can be named the main key 575, and the slot into which the main key 575 is inserted can be named the main key receiving portion 231b. Alternatively, as described later, the key slidably inserted into the rotary scroll 250 from the key in the cross ring 570 can be named the rotary key 571, and the slot into which the rotary key 571 is inserted can be named the rotary key receiving portion 255. However, these names are not strictly required; the rotary key 571 and the main key 575 can be named the first key and the second key (or vice versa), and the rotary key receiving portion 255 and the main key receiving portion 231b can be named the first keyway and the second keyway (or vice versa).

[0502] FIG. 19 It is shown FIG. 14 Exploded stereoscopic view of the vortex disk 250 and the cross ring 570. FIG. 20 It is shown FIG. 14 An exploded 3D view of the main frame 230 and the cross ring 570. FIG. 21A Figure 21 is a perspective view showing the cross ring 570 of the fifth embodiment. Figure 22 is also a perspective view showing the cross ring 670 of the sixth embodiment. FIG. 23 This is a perspective view showing the cross ring 770 of the seventh embodiment. FIG. 24A This is a perspective view showing the cross ring 870 of the eighth embodiment. FIG. 24B This is a perspective view showing the bottom surface of the main frame 230 for which the cross ring 870 of the eighth embodiment is provided.

[0503] Below, refer to FIGS. 19-24B The cross rings 570, 670, 770, and 870 of the fifth to eighth embodiments of the present invention will be described.

[0504] FIG. 21A An example of the cross ring 570 is shown, which is designated as the fifth embodiment of the cross ring 570. Hereinafter, refer to... FIG. 21A The cross ring 570 of the fifth embodiment will be described.

[0505] FIG. 20 An example is shown in which a key receiving portion 231b is provided in the cross ring receiving portion 231a of the frame end plate portion 231 of the main frame 230, and a key 575 is provided in the cross ring 570 adjacent to it.

[0506] In this invention, the example in which a main key receiving portion 231b is provided in the main frame 230 and a main key 575 is provided in the cross ring 570 will be described.

[0507] However, it is not necessarily limited thereto, and the example in which the main key accommodating portion 231b is provided to the cross ring 570 and the main key 575 is provided to the main frame 230 is not completely excluded.

[0508] In addition, an oil supply groove 575a inclinedly extending from the lower side to the upper side is formed in one face of the main key 575. The oil supply groove 575a can flow the oil from the lower end to the upper end of the main key 575.

[0509] The oil supply groove 575a can be provided to both side faces of the key portion formed between the outer side face formed in the circumferential direction of the key portion and the inner side face formed in the circumferential direction of the key portion.

[0510] As shown in FIG. 6, the oil supply groove 575a can be formed in each of the two side faces provided to the opposite sides of each of the main keys 575. FIG. 21A

[0511] As an example, the oil supply groove 575a can be inclinedly extended from a portion of the lower side of the outer periphery side of the cross ring 570 to a portion of the upper side of the inner periphery side of the cross ring 570 in one face of the main key 575.

[0512] Referring to FIG. 6, the main keys 575 can be formed with the inclined oil supply grooves 575a at 180 degrees apart from each other on the ring body 573. FIGS. 19-21A

[0513] In addition, an example in which the oil supply groove 575a is formed in one main key 575 from a portion of the lower right side to a portion of the upper left side is shown. FIG. 21A

[0514] Such an inclined direction is a direction rising toward the inner side of the cross ring 570, and thus the oil subjected to the centrifugal force can move toward the inner side of the cross ring 570, and can become a structure more promoting the upward flow of the oil in contact with the main key 575 of the cross ring 570.

[0515] By forming the oil supply groove 575a inclined in the up-and-down direction in one face of the main key 575 of the cross ring 570, the oil in contact with the cross ring 570 will flow more actively in the main key 575 through the oil supply groove 575a as the cross ring 570 moves, and the oil will be more smoothly supplied to the main key 575, and thus the portion in contact with the oil in each face of the main key 575 increases, and thus the reliability can be improved.

[0516] In addition, the cross ring 570 can further include a ring body 573. The ring body 573 can be formed in a ring shape, and the main key 575 is protruded from one face of the ring body 573 toward the direction of the main key accommodating portion 231b.

[0517] Referring to FIG. 6, the main keys 575 can be formed with the inclined oil supply grooves 575a at 180 degrees apart from each other on the ring body 573. FIG. 20 ​​​, an example in which the main keys 575 are formed protruding from the top surface of the ring body 573 toward the cross ring accommodating portion 231a provided to the frame end plate portion 231 of the main frame 230 is shown. Also, referring to FIG. 19 and FIG. 20 , an example in which two main keys 575 are arranged at 180-degree intervals in the shape of a rectangular parallelepiped is shown.

[0518] As described above, the scroll compressor 200 of the present application ensures low-pressure ratio operation reliability by the structure in which the oil supply groove 575a is formed inclined in the main key 575, and thus can improve actual load efficiency corresponding to low-pressure ratio operation.

[0519] On the other hand, referring to FIG. 19 and FIG. 20 , the cross key 571 can also be provided to the cross ring 570. Also, the cross key accommodating portion 255 in which the cross key 571 is slidably inserted and accommodated can be provided to the cross scroll 250.

[0520] As an example, the cross key 571 can be formed protruding from the bottom surface of the ring body 573 opposite the main key 575 toward the lower side. Also, as shown in FIG. 19 and FIG. 20 , two cross keys 571 can be arranged at 180-degree intervals, and preferably, are alternately arranged at 90-degree intervals in the circumferential direction from the main keys 575.

[0521] The cross key 571 is formed in the shape of a rectangular parallelepiped like the main key 575. Also, the cross key accommodating portion 255 can be formed in the cross scroll 250 so as to slidably accommodate the cross key 571 in the radial direction, FIG. 19 An example of the cross key accommodating portion 255 formed in the radial direction of the cross scroll 250 is shown, and in the drawing, an example in which the cross key accommodating portion 255 is formed in the shape of a groove having a predetermined width and depth in the upper and lower portions is shown.

[0522] On the other hand, referring to FIG. 19 and FIG. 20 , a support portion 577 can be provided between the two main keys 575 of the top surface (contact surface with the main frame 230) of the ring body 573, and a support portion 577 can also be provided between the two cross keys 571 of the bottom surface (contact surface with the cross scroll 250) of the ring body 573. The support portion 577 of the top surface of the ring body 573 can contact the main frame 230, and the support portion 577 of the bottom surface of the ring body 573 can contact the cross scroll 250. By the support portions 577 provided to the top and bottom surfaces of the ring body 573, the cross ring is supported between the main frame 230 and the cross scroll 250 and can slide in the radial direction.

[0523] The cross ring 570 is slidable in the swivel key accommodating portion 255 through the swivel key 571, and the main key 575 is slidable in the main key accommodating portion 231b, thereby preventing the rotation of the swirl scroll 250.

[0524] FIGS. 21B-21E Other examples of the cross ring of the fifth embodiment are shown and described below. FIG. 21A

[0525] On the other hand, the oil supply groove 575a-1 can be formed in at least one of the circumferentially formed outer side surface of the key portion and the circumferentially formed inner side surface of the key portion.

[0526] Referring to FIG. 21B , examples in which the oil supply groove 575a-1 is formed in the circumferentially formed outer side surface of the main key 575 and the circumferentially formed inner side surface of the main key 575, respectively, are shown.

[0527] On the other hand, it can be understood that the circumferentially formed outer side surface and the circumferentially formed inner side surface of the main key 575 are surfaces facing in the same direction as the outer periphery of the cross ring and the inner periphery of the cross ring, respectively.

[0528] Such a structure can be a structure that is advantageous for causing oil accumulated in the inner periphery and the outer periphery of the cross ring 170 to rise in the cross ring through the oil supply groove 575a-1.

[0529] However, the oil supply groove 575a-1 can also be formed only in the circumferentially formed inner side surface of the main key 575.

[0530] In the case where the oil supply groove 575a-1 is formed only in the inner side surface of the main key 575, it can be a structure that is advantageous for causing oil accumulated in the inner side surface of the cross ring to rise.

[0531] In addition, the oil supply grooves 575a-2, 575a-3 can be formed in a multi-stage structure in which a plurality of oil supply grooves 575a-2, 575a-3 are spaced apart from each other on both side surfaces of the key portion.

[0532] In addition, in the rotation direction of the rotation shaft, the number and width of the oil supply grooves 575a-2 on the side surface disposed in front in the rotation direction of the rotation shaft 225 among the two side surfaces can be greater than the number and width of the oil supply grooves 575a-3 on the side surface disposed in the rear.

[0533] In the present application, it can be understood that the two side surfaces are the two side surfaces of the main key 575 disposed between the outer periphery and the inner periphery of the cross ring 570 ( FIG. 21A and FIG. 21C the surfaces in which the oil supply grooves 575a, 575a-2, 575a-3 are formed).

[0534] ​Referring to FIG. 21C , an example is shown in which the oil supply grooves 575a-2, 575a-3 are spaced apart from each other on both sides of the main key 575. FIG. 21C In this example, the oil supply grooves 575a-2 formed on the side of the front main key 575 are four in number and have a relatively larger width than the oil supply grooves 575a-3 formed on the side of the rear main key 575, with reference to the direction of rotation of the rotation shaft 225 shown by the arrow on the lower right end.

[0535] In addition, FIG. 21C In this example, the oil supply grooves 575a-3 formed on the side of the rear main key 575 are three in number (shown by dotted lines) and have a relatively smaller width than the oil supply grooves 575a-2 formed on the side of the front main key 575, with reference to the direction of rotation of the rotation shaft shown by the arrow.

[0536] This structure causes relatively more oil to flow to the side of the main key 575 disposed on the front side with reference to the direction of rotation of the rotation shaft, and thus becomes a structure that is more advantageous for oil supply.

[0537] In addition, the oil supply grooves 575a, 575a-4 can be formed on both sides of the key portion in a manner in which a plurality of oil supply grooves 575a, 575a-4 cross each other.

[0538] Referring to FIG. 21D , an example is shown in which the oil supply grooves 575a, 575a-4 are formed in a structure in which two oil supply grooves cross each other along diagonals on both sides of the main key 575.

[0539] This structure can become a structure that is advantageous for causing oil accumulated on the inner side portion of the cross 170 to rise, as compared with the oil supply grooves 575a described in FIG. 21A

[0540] In addition, the oil supply grooves 575a-6 can be formed in parallel with the direction of extension of the rotation shaft 125. Also, the oil supply grooves 575a-5 can be formed in the radial direction.

[0541] Referring to FIG. 21E , an example is shown in which the oil supply grooves 575a-6 are formed in a direction (up-down direction) parallel with the direction of extension of the rotation shaft 125, and the oil supply grooves 575a-5 are formed in the radial direction (left-right direction) intersecting the direction of extension of the oil supply grooves 575a-6.

[0542] This structure can become a structure that causes oil to flow in the upward direction and is advantageous for oil on the side of the main key 575 of the cross 570.

[0543] FIG. 22A ​Another example of the cross ring 670 is shown, which is named as a cross ring 670 of a sixth embodiment. Hereinafter, the cross ring 670 of the sixth embodiment is described with reference to FIG. 22A The cross ring 670 of the sixth embodiment is described.

[0544] With reference to FIG. 22A The oil supply passage described above can be an oil supply hole 672b formed through a surface of the ring body 673 at a position between the two side surfaces of the key portion.

[0545] FIG. 22A An example in which the main key accommodating portions 231b are provided on the bottom surface of the frame end plate portion 231 of the main frame 230, and the main keys 675 are provided on the cross ring 670 is shown.

[0546] As described above, in the present application, the example in which the main key accommodating portions 231b are provided on the main frame 230, and the main keys 675 are provided on the cross ring 670 is mainly described.

[0547] However, it is not necessarily limited to this, and the example in which the main key accommodating portions 231b are provided on the cross ring 670, and the main keys 675 are provided on the main frame 230 is not completely excluded.

[0548] In addition, an oil supply groove 675a extending obliquely from the lower side to the upper side is formed on one surface of the main key 675. The oil supply groove 675a can cause the oil to flow from the lower end to the upper end of the main key 675.

[0549] Of course, although FIG. 22A An example in which the oil supply groove 675a is formed on only one surface of the main key 675 is shown, but the oil supply groove 675a can be formed on both surfaces provided on opposite sides of each of the main keys 675, respectively.

[0550] As an example, the oil supply groove 675a can extend obliquely from a portion on the lower side of the outer circumferential side of the cross ring 670 to a portion on the upper side of the inner circumferential side of the cross ring 670.

[0551] FIG. 22A An example in which the main keys 675 are formed with oblique oil supply grooves 675a on the ring body 673 at 180 degrees apart from each other is shown.

[0552] In addition, FIG. 22A An example in which the oil supply groove 675a is formed from a portion on the lower right side to a portion on the upper left side in one main key 675 is shown.

[0553] Such an oblique direction is a direction rising toward the inner side of the cross ring 670, so that the oil subjected to centrifugal force can move toward the inner side of the cross ring 670, and at the same time, can be a structure that further promotes the upward flow of the oil in contact with the main keys 675 of the cross ring 670.

[0554] An oil supply groove 675a inclined in the up-and-down direction is formed on one side of the main key 675 of the cross ring 670, and as the cross ring 670 moves, oil in contact with the cross ring 670 flows more actively in the main key 675 through the oil supply groove 675a, and is more smoothly supplied to the main key 675, so that the portion in contact with the oil in each side of the main key 675 increases, and thus the reliability can be improved.

[0555] In addition, the cross ring 670 can further include a ring body 673. The ring body 673 can be formed in a ring shape, and the main key 675 is protruded from one side of the ring body 673 toward the main key accommodation portion 231b.

[0556] Referring to FIG. 20 and FIG. 22A , an example in which the main key 675 is formed to protrude from the top surface of the ring-shaped ring body 673 toward the main key accommodation portion 231b of the main frame 230 is shown. In addition, an example in which two main keys 675 are disposed at an interval of 180 degrees apart from each other in the shape of a rectangular parallelepiped is shown.

[0557] FIG. 22A The cross ring 670 of FIG. 21A differs from the cross ring 570 of

[0558] The oil supply hole 672b can be formed to be inclined in the ring body 673, and the oil supply hole 672b can be formed to pass through the upper and lower ends of the ring body 673 and be inclined.

[0559] In addition, the oil supply hole 672b can be formed to be adjacent to the side surface of the main key 675 at the upper end thereof.

[0560] As shown in FIG. 25 , an example in which the oil supply hole 672b passes through the top surface of the ring body 673 to be adjacent to the left side surface of the main key 675 and is inclined at a predetermined angle is shown. In addition, FIG. 22B an example in which the oil supply hole 672b is formed on the left side and the right side of the main key 675, respectively, so that oil can flow in two directions is shown.

[0561] With the structure in which the oil supply hole 672b is formed to be inclined in the ring body 673 and pass through the upper and lower ends of the ring body 673, oil stored in the cross ring accommodation portion 231a can flow from the bottom surface to the top surface of the cross ring 670 along the oil supply hole 672b as the cross ring 670 moves with respect to the main frame 230.

[0562] In addition, as the oil supply to the inclined oil supply groove 675a formed in the upper and lower directions on one side of the main key 675 of the cross 670 becomes more active, the oil supply to the main key 675 becomes smoother, the portion of each side of the main key 675 that contacts the oil increases, and thus the reliability can be improved.

[0563] In addition, in the rotation direction of the rotation shaft 225, the diameter of the oil supply hole 672b-1 disposed on the front side can be larger than the diameter of the oil supply hole 672b-3 disposed on the rear side.

[0564] Referring to FIG. 22B , an example is shown in which the diameter of the oil supply hole 672b-1 disposed on the front side is larger than the diameter of the oil supply hole 672b-3 disposed on the rear side, with reference to the rotation direction of the rotation shaft shown by an arrow at the lower right end (the rotation direction of the cross).

[0565] However, it is not necessarily limited to the structure of FIG. 22A , and the oil supply hole 672b-1 can be disposed only on the front side with reference to the rotation direction of the rotation shaft 225.

[0566] With such a structure, a relatively larger amount of oil can be raised on the front side in the rotation direction of the rotation shaft 225 due to the rotation force of the cross 670.

[0567] Referring to FIG. 22B and FIG. 22C , an example is shown in which the oil supply holes 672b, 672b-1 are formed in the circumferential direction.

[0568] On the other hand, the oil supply hole 672b-3 can also be formed in the radial direction.

[0569] FIG. 19 An example is shown in which the oil supply hole 672b-3 is formed in the radial direction so as to penetrate the top and bottom surfaces of the ring body 673 adjacent to the two side surfaces of the spiral key 671.

[0570] With such a structure, the oil present on the outer circumferential surface of the cross 670 can be raised in the radial direction by the oil supply hole 672b-3.

[0571] As described above, the scroll compressor 200 of the present application ensures low-pressure ratio operation reliability by the structure in which the oil supply hole 672b is formed in the ring body 673, and thus can improve the actual load efficiency corresponding to the low-pressure ratio operation.

[0572] On the other hand, referring to FIG. 20 , FIG. 22A and FIG. 19A swing key 571 can be further provided to the cross ring 570. In addition, a swing key accommodating portion 255, in which the swing key 571 can be slidably inserted and accommodated, can be provided to the swing end plate portion 251 of the swing scroll 250.

[0573] As an example, the swing key 571 can be formed to protrude downward from the bottom surface of the ring body 673 opposite to the main key 675. In addition, as shown in FIG. 20 , FIG. 22A and FIG. 19 , the swing key 571 can be spaced apart by 180 degrees from each other and two of them are preferably alternately arranged at an interval of 90 degrees from each other in the circumferential direction.

[0574] The swing key 571 can be formed in a cuboid shape like the main key 675. In addition, the swing key accommodating portion 255 can be formed in the swing scroll 250 to slidably accommodate the swing key 571 in the radial direction, FIG. 19 An example of the swing key accommodating portion 255 formed in the radial direction of the swing scroll 250 is shown, and in the drawing, an example in which the swing key accommodating portion 255 is formed in a groove shape having a predetermined width and depth in the upper and lower portions is shown.

[0575] On the other hand, with reference to FIG. 20 and FIG. 23 , a support portion 677 can be provided between the two main keys 675 of the top surface (contact surface with the main frame 230) of the ring body 673, and a support portion 677 can also be provided between the two swing keys 671 of the bottom surface (contact surface with the swing scroll 250) of the ring body 673. The support portion 677 of the top surface of the ring body 673 can be in contact with the main frame 230, and the support portion 677 of the bottom surface of the ring body 673 can be in contact with the swing scroll 250. By providing the support portions 677 on the top and bottom surfaces of the ring body 673, respectively, the cross ring is supported between the main frame 230 and the swing scroll 250 and can slide in the radial direction.

[0576] The cross ring 670 prevents the swing of the swing scroll 250 by the structure in which the swing key 671 is slidably provided to the swing key accommodating portion 255 and the main key 675 is slidably provided to the main key accommodating portion 231b.

[0577] FIG. 23 Another example of a cross ring 770 is shown, which is named as a cross ring 770 of a seventh embodiment. Hereinafter, the cross ring 770 of the seventh embodiment will be described with reference to FIG. 20 .

[0578] FIG. 19An example in which the main key accommodating portion 231b is provided on the bottom surface of the frame end plate portion 231 of the main frame 230 and the main key 775 is provided on the cross 770 adjacent thereto is shown.

[0579] As described above, in the present application, an example in which the main key accommodating portion 231b is provided on the main frame 230 and the main key 775 is provided on the cross 770 is mainly described.

[0580] However, it is not necessarily limited thereto, and an example in which the main key accommodating portion 231b is provided on the cross 770 and the main key 775 is provided on the main frame 230 is not completely excluded.

[0581] In addition, the oil supply groove 775a is formed on one surface of the main key 775 to extend obliquely from the lower side to the upper side. The oil supply groove 775a can flow the oil from the lower end to the upper end of the main key 775.

[0582] As an example, the oil supply groove 775a can obliquely extend from a portion of the lower side of the outer periphery side of the cross 770 to a portion of the upper side of the inner periphery side of the cross 770.

[0583] Referring to FIG. 20 , FIG. 23 , and FIG. 23 , an example in which the main key 775 is formed with the oblique oil supply groove 775a on the ring body 773, which is spaced apart from each other by 180 degrees, is shown.

[0584] In addition, FIG. 20 An example in which the oil supply groove 775a is formed on one main key 775 to extend from a portion of the lower right side to a portion of the upper left side is shown.

[0585] Such an oblique direction is a direction of rising toward the inner side of the cross 770, so that the oil subjected to the centrifugal force can move toward the inner side of the cross 770, and at the same time, can be a structure that more actively flows in the upward direction of the oil in contact with the main key 775 of the cross 770.

[0586] By forming the oil supply groove 775a obliquely in the up-and-down direction on one surface of the main key 775 of the cross 770, as the cross 770 moves, the oil in contact with the cross 770 will more actively flow in the main key 775 through the oil supply groove 775a and more smoothly supply the oil to the main key 775, so that the portion in contact with the oil in each surface of the main key 775 increases, and thus the reliability can be improved.

[0587] In addition, the cross 770 can further include a ring body 773. The ring body 773 can be formed in a ring shape, and the main key 775 protrudes from one surface of the ring body 773 in a direction toward the main key accommodating portion 231b.

[0588] FIG. 23An example is shown where a main key 775 protrudes from the top surface of the annular ring body 773 toward the frame end plate portion 231 of the main frame 230. Another example is shown where two main keys 775 are arranged in a cuboid shape, spaced 180 degrees apart.

[0589] FIG. 21A Cross ring 770 and FIG. 22A and FIG. 23 The difference of the cross ring 770 is that an oil supply face 773a is formed protruding on the outer periphery of the ring body 773.

[0590] The oil supply face 773a has an inclined face 773b, which is inclined to allow the oil flowing into the lower part of the cross ring 770 to flow upward.

[0591] As an example, the inclined surface 773b can be parallel to the formation direction of the oil supply hole 772b.

[0592] like FIG. 23 As shown, the oil supply face 773a can be a triangular prism shape with a predetermined width.

[0593] Through the oil supply part 773a provided with the inclined surface 773b, the oil contained in the cross ring receiving part 231a flows upward from the lower part of the cross ring 770 along the inclined surface 773b on the outer periphery of the ring body 773, thereby guiding the oil supply to the top surface of the ring body 773.

[0594] In addition, as the oil is supplied to the top surface of the guide ring body 773, the inclined oil supply groove 775a formed in the vertical direction on one side of the main key 775 of the cross ring 770 will be supplied with oil more actively and the oil supply to the main key 775 will be supplied more smoothly, thereby increasing the portion of the main key 775 in contact with oil, thus improving reliability.

[0595] exist FIG. 23 In the cross ring 770 shown, the oil supply hole 772b can also be formed obliquely in the ring body 773. The oil supply hole 772b can penetrate the upper and lower ends of the ring body 773 and be formed obliquely.

[0596] In addition, the oil supply hole 772b can be formed so that its upper end is adjacent to the side of the main key 775.

[0597] like FIG. 25 As shown, an example is illustrated where the oil supply hole 772b penetrates the top surface of the ring body 773 to be adjacent to the left side of the main key 775, and maintains a predetermined angle; the oil supply hole 772b is in an inclined form. Furthermore, FIG. 23 An example is shown where oil supply holes 772b are formed on the left and right sides of the main key 775, thereby enabling oil to flow in both directions.

[0598] The oil supplied to the cross 770 can flow along the oil supply hole 772b from the bottom surface to the top surface of the cross 770 when the cross 770 moves relative to the main frame 230, by the oil supply hole 772b being obliquely formed in the ring body 773 and the structure through which the upper and lower ends of the ring body 773 are penetrated.

[0599] In addition, as the oil supply to the obliquely formed oil supply groove 775a on one side of the main key 775 of the cross 770 in the up-and-down direction becomes more active, the oil supply to the main key 775 becomes more smooth, the portion in contact with the oil in each side of the main key 775 increases, and thus the reliability can be improved.

[0600] In particular, in the cross 770 shown in the drawings, since the inclined surface 773b and the oil supply hole 772b are formed in parallel with each other, in the case where the cross 770 is slidably moved relative to the main frame 230, along such a moving direction, the oil at the bottom of the cross 770 can flow along the inclined end of the inclined surface 773b and the inclined angle of the oil supply hole 772b to the top surface of the ring body 773. FIG. 23 In addition, the main key 775 can be provided with a protruding side portion 775b protruding more in the direction toward at least one of the outer periphery and the inner periphery of the ring body 773. The oil supply surface portion 773a can be connected to the protruding side portion 775b to supply oil to the oil supply groove 775a through the upper portion of the inclined surface 773b.

[0601] The protruding side portion 775b protruding in the direction toward the outer periphery of the ring body 773 and the oil supply surface portion 773a connected thereto are shown. The oil supply groove 775a can extend to the side end portion to be connected to the inclined surface 773b of the oil supply surface portion 773a. FIG. 19 Thus, the oil rising along the inclined surface 773b of the oil supply surface portion 773a can be more facilitated to rise to the upper portion of the main key 775 through the oil supply groove 775a extending to the protruding side portion 775b.

[0602] As described above, the scroll compressor 200 of the present application can improve the actual load efficiency corresponding to the low pressure ratio operation by securing the low pressure ratio operation reliability through the structure in which the oil supply surface portion 773a having the inclined surface 773b is formed in the ring body 773 and the oil supply hole 772b is formed in the ring body 773.

[0603] On the other hand, referring to

[0604] , FIG. 20 and FIG. 23 , the cross 770 can further be provided with a convolution key 771. In addition, the convolution scroll 250 can be provided with a convolution key receiving portion 255 in which the convolution key 771 is slidably inserted and received. FIG. 19

[0605] ​As an example, the swing key 771 can be formed to protrude downward from the bottom surface of the ring body 773 opposite to the main key 775. Also, as shown in FIG. 20 and FIG. 19 the swing key 771 can be spaced apart by 180 degrees from each other, and preferably, alternately arranged at 90 degrees from each other in the circumferential direction.

[0606] The swing key 771 can be formed in a cuboid shape like the main key 775. Also, the swing key accommodation portion 255 can be formed to slidably accommodate the swing key 771 in the radial direction of the swing scroll 250, FIG. 19 An example of the swing key accommodation portion 255 formed in the radial direction of the swing scroll 250 is shown, and in the drawing, an example in which the swing key accommodation portion 255 is formed in a groove shape having a predetermined width and depth at the upper and lower portions is shown.

[0607] On the other hand, referring to FIG. 20 and FIG. 24A a support portion 777 can be provided between the two main keys 775 of the top surface (contact surface with the main frame 230) of the ring body 773, and a support portion 777 can also be provided between the two swing keys 771 of the bottom surface (contact surface with the swing scroll 250) of the ring body 773. The support portion 777 of the top surface of the ring body 773 can be in contact with the main frame 230, and the support portion 777 of the bottom surface of the ring body 773 can be in contact with the swing scroll 250. By providing the support portions 777 on the top and bottom surfaces of the ring body 773, respectively, the cross roller is supported between the main frame 230 and the swing scroll 250 and can slide in the radial direction.

[0608] The cross roller 770 is prevented from rotating by the structure in which the swing key 771 is slidable in the swing key accommodation portion 255 and the main key 775 is slidable in the main key accommodation portion 231b.

[0609] FIG. 24A Another example of a cross roller 870 is shown, which is named as a cross roller 870 of an eighth embodiment. Hereinafter, the cross roller 870 of the eighth embodiment will be described with reference to FIG. 20 The cross roller 870 of the eighth embodiment will be described.

[0610] FIG. 24A An example in which the cross roller accommodation portion 231a of the frame end plate portion 231 of the main frame 230 is provided with the main key accommodation portion 231b, and the cross roller 870 adjacent thereto is provided with the main key 875 is shown.

[0611] As described above, in the present application, mainly, an example in which the main frame 230 is provided with the main key accommodation portion 231b, and the cross roller 870 is provided with the main key 875 is described.

[0612] However, it is not necessarily limited thereto, and it is not completely excluded that the main key accommodating portion 231b is provided to the cross ring 870 and the main key 875 is provided to the main frame 230.

[0613] FIG. 24B The cross ring 870 of the eighth embodiment is different from the aforementioned embodiments in that the oil supply groove is not formed in the main key 875.

[0614] On the other hand, the main key accommodating portion 231b of the main frame 230 to which the cross ring 870 of the eighth embodiment is provided is formed with the oil supply groove 231c.

[0615] The oil supply groove 231c is formed obliquely from a portion of the inner peripheral surface of the main key accommodating portion 231b that contacts a portion of the outer peripheral side of the cross ring 870 on the lower side to a portion that contacts a portion of the inner peripheral side of the cross ring 870 on the upper side.

[0616] As an example, the oil supply groove 875a can extend obliquely from a portion of the inner peripheral side of the main key accommodating portion 231b provided to the cross ring accommodating portion 231a on the bottom surface of the frame end plate portion 231 on the lower side to a portion on the upper side formed on the outer peripheral side of the main key accommodating portion 231b.

[0617] Referring to FIG. 24B , an example is shown in which the inner peripheries of the main key accommodating portions 231b each formed on the cross ring accommodating portion 231a on the bottom surface of the frame end plate portion 231 of the main frame 230 are spaced apart by 180 degrees and obliquely formed with the oil supply grooves 231c.

[0618] In addition, FIG. 24B An example is shown in which a plurality of oil supply grooves 231c are obliquely formed on the side surface of the inner periphery of one main key accommodating portion 231b and arranged spaced apart from each other.

[0619] The oil supply groove 231c is obliquely inclined to the at least one side surface of the key accommodating portion, and the outer peripheral side of the cross ring 870 can be the lower end and the inner peripheral side of the cross ring 870 can be the upper end.

[0620] FIG. 24C An example is shown in which the oil supply grooves 231c are obliquely formed on the side surface of the main key accommodating portion 231b of the main frame 230 and arranged spaced apart from each other and formed from the lower end of the outer peripheral side of the cross ring 870 to the upper end of the inner peripheral side of the cross ring 870.

[0621] Such a tilt direction is a direction in which the inner periphery of the main key accommodating portion 231b rises, so that oil that bears a centrifugal force can move in the inner periphery of the main key accommodating portion 231b in the direction in which the oil supply groove 231c is formed, and at the same time, can become a structure that more actively flows in the upward direction of the oil that contacts the main key 875 of the cross 870.

[0622] In addition, the oil supply groove 231c-1 can be formed in at least one side surface of the key accommodating portion, and the oil supply groove 231c is formed in the radial direction.

[0623] FIG. 20 An example in which the oil supply grooves 231c-1 are formed in the radial direction in the side surfaces of the main key accommodating portion 231b of the main frame 230, and are arranged apart from each other is shown.

[0624] In the case where the oil supply grooves 231c-1 are formed in the radial direction, a structure that is advantageous for retaining oil in the main key accommodating portion 231b can be obtained.

[0625] With such a structure, even if the oil supply groove is not formed in the main key 875 of the cross 870 unlike the aforementioned embodiments, oil can be caused to flow on the main key 875 by the oil supply groove 231c of the inner periphery of the main key accommodating portion 231b that contacts the main key 875.

[0626] In other words, by forming the oil supply groove 231c that tilts in the upward and downward directions in the inner periphery of the main key accommodating portion 231b of the main frame 230, as the cross 870 moves, the oil that contacts the cross 870 will rise by the oil supply groove 231c of the inner periphery of the main key accommodating portion 231b, and thus the oil more actively flows in the main key 875 of the cross 870 that contacts the oil supply groove 231c, and the oil is more smoothly supplied to the main key 875, so that the portion that contacts the oil in each surface of the main key 875 increases, and thus the reliability can be improved.

[0627] In particular, as with the cross 870 in the other embodiments, the cross 870 can also include a ring body 873. The ring body 873 can be formed in a ring shape, and the main key 875 can protrude from one surface of the ring body 873 toward the main key accommodating portion 231b.

[0628] FIG. 24A An example in which the main key 875 is formed protruding from the top surface of the ring-shaped ring body 873 toward the frame end plate portion 231 of the main frame 230 is shown. In addition, an example in which two main keys 875 are arranged apart from each other at an interval of 180 degrees in the shape of a rectangular parallelepiped is shown.

[0629] The fourth embodiment of the cross ring 870 differs from the cross rings 570, 670, and 770 of the first to third embodiments in that an oil supply groove 875a is not formed on the main key 875. On the other hand, the fourth embodiment may have an oil supply hole 872b provided in the same manner as any of the cross rings 570, 670, and 770 of the first to third embodiments. Additionally, an oil supply surface 873a may be formed protruding from the outer periphery of the ring body 873.

[0630] The oil supply face 873a has an inclined face 873b, which is inclined to allow the oil flowing into the lower part of the cross ring 870 to flow upward.

[0631] As an example, the inclined surface 873b can be parallel to the formation direction of the oil supply hole 872b.

[0632] like FIG. 24A As shown, the oil supply face 873a can be a triangular prism shape with a predetermined width.

[0633] Through the oil supply part 873a provided with the inclined surface 873b, the oil contained in the cross ring receiving part 231a of the main frame 230 flows upward from the lower part of the cross ring 870 along the inclined surface 873b on the outer periphery of the ring body 873, thereby guiding the oil supply to the top surface of the ring body 873.

[0634] Furthermore, as oil is guided to the top surface of the ring body 873, the inclined oil supply groove 231c formed in the vertical direction on one side of the inner periphery of the main key receiving portion 231b will be supplied with oil more actively, and the main key 875 in contact with it will be supplied with oil more smoothly. As a result, the portion in contact with oil on each surface of the main key 875 increases, thereby improving reliability.

[0635] exist FIG. 24A In the cross ring 870 shown, the oil supply hole 872b can also be formed obliquely in the ring body 873. The oil supply hole can penetrate the upper and lower ends of the ring body 873 and be formed obliquely.

[0636] In addition, the oil supply hole 872b can be formed so that its upper end is adjacent to the side of the main key 875.

[0637] like FIG. 25 As shown, an example is illustrated where the oil supply hole 872b penetrates the top surface of the ring body 873 to be adjacent to the left side of the main key 875, and maintains a predetermined angle; the oil supply hole 872b is in an inclined shape. Additionally, FIG. 24A An example is shown where oil supply holes 872b are formed on the left and right sides of the main key 875, thereby enabling oil to flow in both directions.

[0638] With the oil supply hole 872b obliquely formed on the ring body 873 and extending through the upper and lower ends of the ring body 873, the oil stored in the cross ring receiving portion 231a can flow from the bottom to the top surface of the cross ring 870 along the oil supply hole 872b when the cross ring 870 moves relative to the main frame 230.

[0639] Furthermore, as the oil supply to the inclined oil supply groove 231c formed in the vertical direction on the inner peripheral side of the key receiving portion 231b of the vortex disk 250 becomes more active, the oil supply to the key 875 that contacts the inner peripheral side of the key receiving portion 231b becomes smoother, and the portion of each surface of the key 875 in contact with oil increases, thereby improving reliability.

[0640] Especially in FIG. 23 In the cross ring 870 shown, since the inclined surface 873b and the oil supply hole 872b are parallel to each other, when the cross ring 870 can slide relative to the main frame 230, the oil at the bottom of the cross ring 870 can flow toward the top surface of the ring body 873 along the inclined end of the inclined surface 873b and the inclined angle of the oil supply hole 872b in such a moving direction.

[0641] Additionally, the main key 875 may be provided with a protruding side 875b that protrudes further toward at least one of the outer and inner circumferences of the ring body 873. The oil supply surface 873a may be connected to the protruding side 875b to supply oil to the oil supply groove 875a through the upper part of the inclined surface 873b. FIG. 19 A protruding side portion 875b protruding towards the outer periphery of the ring body 873 and an oil supply surface portion 873a connected thereto are shown. The oil supply groove 875a may extend to the side end to connect with the inclined surface 873b of the oil supply surface portion 873a.

[0642] Therefore, the oil rising along the inclined surface 873b of the oil supply face 873a can be further encouraged to rise to the upper part of the main key 875 through the oil supply groove 875a extending to the protruding side 875b.

[0643] As described above, the scroll compressor 200 of the present invention ensures low pressure ratio operation reliability by forming an oil supply surface 873a with an inclined surface 873b in the ring body 873 and forming an oil supply hole 872b in the ring body 873, thereby improving the actual load efficiency corresponding to low pressure ratio operation.

[0644] On the other hand, FIG. 20 and FIG. 19 The cross ring 870 may also be provided with a rotary key 871. In addition, the rotary scroll 250 may be provided with a rotary key receiving part 255 for slidably inserting and accommodating the rotary key 871.

[0645] As an example, the rotation key 871 can be formed to protrude downward from the bottom surface of the ring body 873 opposite to the main key 875. Also, as shown in FIG. 20 and FIG. 19 , the rotation key 871 can be spaced apart by 180 degrees from each other, and preferably, alternately arranged at 90 degrees from each other in the circumferential direction from the main key 875.

[0646] The rotation key 871 can be formed in a cuboid shape like the main key 875. Also, the rotation key accommodation portion 255 can be formed to slidably accommodate the rotation key 871 in the radial direction of the rotation scroll 250, FIG. 19 Examples of the rotation key accommodation portion 255 formed in the radial direction of the rotation scroll 250 are shown, and in the drawings, examples in which the rotation key accommodation portion 255 is formed in a groove shape having a predetermined width and depth in the upper and lower portions are shown.

[0647] On the other hand, referring to FIG. 20 and FIG. 26 , a support portion 877 can be provided between the two main keys 875 of the top surface (contact surface with the main frame 230) of the ring body 873, and a support portion 877 can also be provided between the two rotation keys 871 of the bottom surface (contact surface with the rotation scroll 250) of the ring body 873. The support portion 877 of the top surface of the ring body 873 can be in contact with the main frame 230, and the support portion 877 of the bottom surface of the ring body 873 can be in contact with the rotation scroll 250. By the support portions 877 provided in the top and bottom surfaces of the ring body 873, respectively, the cross roller 870 is supported between the main frame 230 and the rotation scroll 250 and can slide in the radial direction.

[0648] The cross roller 870 is prevented from rotating by the structure in which the rotation key 871 is slidable in the rotation key accommodation portion 255 and the main key 875 is slidable in the main key accommodation portion 231b.

[0649] Hereinafter, a scroll compressor according to still another embodiment of the present application will be described. FIG. 26 The scroll compressor according to the embodiment described below is an upper compression type scroll compressor like the scroll compressor according to

[0650] Although ​ the scroll compressor described below is an upper compression type scroll compressor like the scroll compressor according to Figure 1 , it is different from the structure described in Figure 1 , etc. in that the key portions (rotation key and fixed key) of the cross roller are both formed in the top surface (one-way cross roller).

[0651] On the other hand, with respect to the housing and rotating shaft, etc. not shown in Figure 26 , etc., they can be understood with reference to Figure 1 , etc.

[0652] In addition, regarding the un-described Figure 26 The following features of the scroll compressor will be understood with reference to the description of the same upper compression method of Figure 1 and the like.

[0653] The scroll compressor of the present application includes a housing 110 Figure 1 ), a main frame 330, a rotating shaft 125 Figure 1 ), a revolving scroll 350, a fixed scroll 340, and a cross ring 970.

[0654] In addition, the cross ring 970 includes a ring body 973 and a key portion.

[0655] The ring body 973 is formed in a ring shape, and is disposed between the main frame 330 and the revolving scroll 350 to be supported in the axial direction of the rotating shaft.

[0656] The key portion extends in the axial direction of the ring body 973, and is slidably inserted into a key receiving portion of the revolving scroll 350 or the main frame 330 or the fixed scroll 340.

[0657] The key portion can include a revolving key 971 and a fixed key 975, which will be described later.

[0658] The key receiving portion can include a revolving key receiving portion 355 and a fixed key receiving portion 3441, which will be described later.

[0659] An oil supply passage is provided in the ring body 973 or the key portion, and is configured to guide oil accumulated in a member supporting the ring body 973 toward between the key portion and the key receiving portion.

[0660] The oil supply passage can be at least one of an oil supply groove 971a, an oil supply hole 1072b, and an oil supply surface portion 1273a, which will be described later.

[0661] On the other hand, with reference to Figure 26 and Figure 27 , the cross ring 970 can be provided with a revolving key 971 protruding from the top surface toward the revolving scroll 350 and a fixed key 975 protruding from the top surface toward the fixed scroll 340. That is, Figure 26 The cross ring 970 described in the following can be understood as a "one-way cross ring" provided with the revolving key 971 and the fixed key 975 in the top surface. On the other hand, Figure 1 and Figure 14 , the cross ring 170, 570 described in the following can be understood as a "two-way cross ring" in which the revolving key 171, 571 and the main key 175, 575 are separately disposed in the top surface and the bottom surface.

[0662] With reference to Figure 26 andFigure 27 The orbiting key 971 and the fixed key 975 can be arranged at an interval of approximately 90 degrees in the circumferential direction from each other.

[0663] An orbiting key accommodating portion 355 is provided on the bottom surface of the orbiting scroll 350, and a fixed key accommodating portion 3441 is provided on the bottom surface of the fixed scroll 340.

[0664] The orbiting key 971 can be slidably inserted into the orbiting key accommodating portion 355, and the fixed key 975 can be slidably engaged with the fixed key accommodating portion 3441.

[0665] On the other hand, the fixed key accommodating portion 3441 can be formed in the form of a recessed groove of a guide protrusion portion 344 protruding from the outer periphery of the fixed scroll 340.

[0666] Figure 27 An example in which the fixed key accommodating portions 3441 are arranged at an interval of 180 degrees in the circumferential direction of the guide protrusion portion 344 is shown.

[0667] Figures 28A-28E The structures of the various oil supply grooves shown are the same in structure as the oil supply groove structure of the foregoing Figures 9A-9E , and differ only in reference numerals, and thus the explanation thereof will follow the explanation of the foregoing Figures 9A-9E .

[0668] In addition, Figures 29A-29C The structures of the various oil supply holes and the oil supply grooves shown are the same in structure as the structures of the various oil supply holes and the oil supply grooves shown in Figures 10A-10C , and differ only in reference numerals, and thus the explanation thereof will follow the explanation of the foregoing Figures 10A-10C .

[0669] In addition, Figure 30 , Figures 31A-31C The structures shown are the same in structure as the structures shown in Figures 11-12C , and differ only in reference numerals, and thus the explanation thereof will follow the explanation of the foregoing Figures 11-12C .

[0670] In the scroll compressor of the present application, by applying the edge portion inclined end or the like groove structure, oil is more smoothly supplied to the key portion as the cross roller 170 moves, and thus reliability can be improved.

[0671] In addition, in the scroll compressor of the present application, by applying the inclined oil supply hole machining, the key contact portion oil supply groove, oil is more smoothly supplied to the orbiting key 171 as the cross roller moves, and thus reliability can be improved.

[0672] Further, in the scroll compressor of the present application, the related lubrication structure is improved by forming the oil groove in the orbit key of the cross ring and providing the oil hole in the cross ring, so that the expansion of the low pressure ratio operation area is possible.

[0673] Further, the scroll compressor of the present application improves the low pressure ratio operation reliability by the above-mentioned oil supply structure improvement, so that the actual load efficiency corresponding to the low pressure ratio operation can be improved.

[0674] Further, the scroll compressor of the present application can solve the problem of insufficient oil amount in the intermediate pressure space of the existing one without additional components, but by simply processing the cross ring.

[0675] Further, in the scroll compressor of the present application, the oil contained in the cross ring containing portion flows along the inclined surface from the lower portion of the cross ring to the upper direction of the ring body, so that the oil is guided to the top surface of the ring body.

[0676] Further, as the oil is guided to the top surface of the ring body, the oil supply to the inclined groove formed in the orbit key of the cross ring in the up and down direction is more active, and the oil supply to the orbit key is more smooth, so that the portion in contact with the oil in each surface of the orbit key increases, and thus the reliability can be improved.

[0677] Further, in the scroll compressor of the present application, the groove can be formed in the inner circumferential surface of the orbit key groove of the orbit scroll.

[0678] Therefore, as the oil is guided to the top surface of the ring body, the oil supply to the inclined groove formed in the inner circumferential surface of the orbit key groove of the orbit scroll in the up and down direction is more active, and the oil supply to the orbit key is more smooth, so that the portion in contact with the oil in each surface of the orbit key increases, and thus the reliability can be improved.

[0679] In the present application, the oil stored in the cross ring containing portion can flow along the oil supply hole from the bottom surface to the top surface of the cross ring when the cross ring moves relative to the main frame, by the inclined formation of the oil supply hole in the ring body and the structure of penetrating the upper and lower ends of the ring body.

[0680] Further, in the present application, as the oil supply to the inclined oil supply groove formed in the inner circumferential surface of the orbit key containing portion of the orbit scroll in the up and down direction is more active, the oil supply to the orbit key in contact with the inner circumferential surface of the orbit key containing portion is more smooth, and the portion in contact with the oil in each surface of the orbit key increases, and thus the reliability can be improved.

[0681] Further, the orbit key of the present application can be provided with a protruding side portion, and the oil supply surface portion can be connected to the protruding side portion to supply the oil to the oil supply groove through the upper portion of the inclined surface. Also, the oil supply groove can extend to the side end portion to be connected to the inclined surface of the oil supply surface portion.

[0682] Therefore, the oil rising along the inclined surface of the oil supply surface portion can be more promoted to rise to the upper portion of the key by the oil supply groove extending to the convex side portion.

[0683] In addition, by providing the oil supply surface portion with the inclined surface, the oil contained in the cross ring containing portion of the main frame flows from the lower portion of the cross ring to the inclined surface in the upward direction of the outer periphery of the ring body, thereby being guided to the top surface of the ring body.

[0684] The present application has an oil supply improvement structure for the key portion of the orbiting scroll in order to improve low pressure ratio oil supply, so that it can be applied not only to a scroll compressor of a high pressure type upper compression structure, but also to a scroll compressor of a lower compression structure.

[0685] In addition, the present application can have an oil supply groove formed on the outer side surface, the inner side surface, and both side surfaces of the key portion in the circumferential direction, so that it can be a structure that is advantageous for the oil to rise on each surface.

[0686] In addition, in the present application, the oil supply groove on the side surface disposed in front of the key portion has a relatively larger number or a larger width with respect to the rotation direction of the rotation shaft, so that relatively more oil flows, and thus it can be a structure that is more advantageous for oil supply.

[0687] In addition, the oil supply groove of the present application is formed in parallel in the radial direction of the key portion or the key containing portion, so that it can be a structure that is advantageous for oil retention.

[0688] In addition, in the present application, the diameter of the oil supply hole disposed on the front side can be larger than the diameter of the oil supply hole disposed on the rear side in the rotation direction of the rotation shaft (the rotation direction of the cross ring), so that a relatively larger amount of oil can rise on the front side in the rotation direction of the rotation shaft due to the rotation force of the cross ring.

[0689] The scroll compressors 100 and 200 described above are not limited to the configurations and methods of the embodiments described above, and various modifications of the embodiments can be realized by selectively combining all or a part of each embodiment.

[0690] It will be apparent to those skilled in the art that the present application can be embodied in other specific forms without departing from the spirit and essential characteristics of the application. Thus, the above detailed description of the application is not to be taken in a limiting sense, but is made merely for the purpose of describing the general principles of the application. The scope of the application should be determined by reasonable interpretation of the appended claims, and all modifications within the scope of the application should be included in the scope of the application.

Claims

1. A scroll compressor, wherein comprising: a housing; a main frame provided inside the housing; a rotating shaft supported at the main frame; an orbiting scroll coupled with the rotating shaft and supported at the main frame; a fixed scroll fixed to the main frame and forming a compression chamber by engaging with the orbiting scroll; and a cross ring slidably coupled to the orbiting scroll to prevent rotation of the orbiting scroll, the cross ring comprising: a ring body formed in a ring shape, provided between the main frame and the orbiting scroll, and supported in an axial direction of the rotating shaft; and a key portion extending in an axial direction from the ring body and slidably inserted into a key receiving portion provided in the orbiting scroll or the main frame or the fixed scroll, an oil supply passage is provided in the ring body or the key portion, the oil supply passage guiding oil accumulated on a member supporting the ring body toward between the key portion and the key receiving portion, the oil supply passage is constituted by an oil supply hole passing through a face of the ring body connected to a side face of at least one of both sides of the key portion, the oil supply hole is formed obliquely with one end of the oil supply hole directed toward the key portion. 2.A scroll compressor, wherein comprising: a housing; a main frame provided inside the housing; a rotating shaft supported at the main frame; an orbiting scroll coupled with the rotating shaft and supported at the main frame; a fixed scroll fixed to the main frame and forming a compression chamber by engaging with the orbiting scroll; and a cross ring slidably coupled to the orbiting scroll to prevent rotation of the orbiting scroll, the cross ring comprising: a ring body formed in a ring shape, provided between the main frame and the orbiting scroll, and supported in an axial direction of the rotating shaft; and a key portion extending in an axial direction from the ring body and slidably inserted into a key receiving portion provided in the orbiting scroll or the main frame or the fixed scroll, an oil supply passage is provided in the ring body or the key portion, the oil supply passage guiding oil accumulated on a member supporting the ring body toward between the key portion and the key receiving portion, the oil supply passage comprising: an oil supply face portion protruding in a radial direction from at least one of an inner periphery and an outer periphery of the ring body; and a protruding side portion protruding in a radial direction from at least one of an outer periphery and an inner periphery of the key portion to be connected to the oil supply face portion, an inclined face is formed on a side of the ring body in a circumferential direction of the oil supply face portion, an oil supply groove is formed on a side of the ring body in a circumferential direction of the key portion so that one end of the oil supply groove is connected to the inclined face. 3.The scroll compressor according to claim 2, wherein the oil supply passage further comprises an oil supply groove formed on at least one side face of the key receiving portion facing the key portion. 4.The scroll compressor according to claim 2, wherein ​ ​ ​ In the rotation direction of the rotation shaft, the oil supply grooves of the side face, which is disposed in the front with reference to the rotation direction of the rotation shaft, among the both side faces of the key portion have more number or wider width than the oil supply grooves of the side face, which is disposed in the rear with reference to the rotation direction of the rotation shaft.

5. The scroll compressor according to claim 2, wherein The oil supply grooves are formed obliquely, the outer peripheral side of the cross ring is the lower end of the oil supply grooves, and the inner peripheral side of the cross ring is the upper end of the oil supply grooves.

6. The scroll compressor according to claim 3, wherein The oil supply grooves are formed in the radial direction.

7. The scroll compressor according to claim 2, wherein The oil supply passage further includes an oil supply hole that penetrates the ring body and is connected to the face of at least one of the both side faces of the key portion.

8. The scroll compressor according to claim 7, wherein The oil supply holes respectively formed in the both side faces of the key portion are formed to have the same diameter as each other, or are formed to have a diameter of the oil supply hole disposed in the front side larger than a diameter of the oil supply hole disposed in the rear side in the rotation direction of the rotation shaft.

9. The scroll compressor according to claim 7, wherein The oil supply holes are formed obliquely in the circumferential direction or in the radial direction.

10. The scroll compressor according to any one of claims 1 to 9, wherein The orbiting scroll and the fixed scroll are disposed in an upper portion of the housing, the main frame is disposed on the opposite side of the orbiting scroll through the cross ring, The key accommodating portions include: An orbiting key accommodating portion formed in one face of the orbiting scroll; and A main key accommodating portion formed in one face of the main frame, The key portions include: An orbiting key slidably inserted into the orbiting key accommodating portion in the top face of the ring body; and A main key slidably inserted into the main key accommodating portion in the bottom face of the ring body.

11. The scroll compressor according to any one of claims 1 to 9, wherein The orbiting scroll and the fixed scroll are disposed in a lower portion of the rotation shaft, the main frame is disposed on the top face of the orbiting scroll, and the main frame is disposed on the opposite side of the orbiting scroll through the cross ring, The key accommodating portions include: A main key accommodating portion formed in one face of the main frame; and An orbiting key accommodating portion formed in one face of the orbiting scroll, The key portions include: A main key slidably inserted into the main key accommodating portion in the top face of the ring body; and An orbiting key slidably inserted into the orbiting key accommodating portion in the bottom face of the ring body.

12. The scroll compressor according to any one of claims 1 to 9, wherein The orbiting scroll and the fixed scroll are disposed in an upper portion of the housing, and the main frame is disposed on the opposite side of the orbiting scroll through the cross ring, The key accommodating portions include: An orbiting key accommodating portion formed in one face of the orbiting scroll; and A fixed key accommodating portion formed in one face of the fixed scroll, The key portions include: An orbiting key slidably inserted into the orbiting key accommodating portion in the top face of the ring body; and A fixed key slidably inserted into the fixed key accommodating portion in the bottom face of the ring body. A fixed key is slidably inserted into the fixed key accommodating portion, which is disposed apart from the top surface of the ring body by the swivel key.

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