Scroll compressor

Abstract

Disclosed is a scroll compressor. In the scroll compressor, oil can be smoothly supplied between a thrust surface of a main frame and a disk part-contact surface of an orbiting scroll even when the thrust surface of the main frame and the disk part-contact surface of the orbiting scroll are completely pressed against each other. The scroll compressor according to an embodiment of the present invention includes the main frame, the orbiting scroll, and a non-orbiting scroll. On one surface of the orbiting scroll, an oil flow path is formed in a region supported by the main frame.

Description

scroll compressor

[0001] The present invention relates to a scroll compressor.

[0002] The compressor used in the refrigeration cycle of a refrigerator or air conditioner compresses the refrigerant gas and transmits it to the condenser.

[0003] Rotary compressors or scroll compressors are mainly used in air conditioners, and scroll compressors are being used not only in air conditioners but also in compressors for water heaters that require a higher compression ratio than air conditioners.

[0004] A scroll compressor is classified as a sealed compressor if the drive unit (or electric unit) and the compression unit are included in one casing, and as an open compressor if they are provided independently. If the compression unit is located above the drive unit, it is classified as an upper compression type, and if located below, it is classified as a lower compression type. If the space where the drive unit is accommodated is suction pressure, it is classified as a low pressure type, and if it is discharge pressure, it is classified as a high pressure type.

[0005] In addition, the scroll compressor includes a fixed scroll having a fixed wrap and an orbiting scroll having an orbiting wrap that meshes with the fixed wrap. Scroll compressors can be classified into orbiting back-pressure types and fixed back-pressure types depending on the back-pressure method. The orbiting back-pressure method is a method in which a back-pressure chamber is formed on the back surface of the orbiting scroll, and the fixed back-pressure method is a method in which a back-pressure chamber is formed on the back surface of the fixed scroll. Typically, in the fixed back-pressure method, the fixed scroll is defined as a non-orbiting scroll and explained.

[0006] A scroll compressor comprises a main frame. The main frame is positioned opposite a non-orbiting scroll, with an orbiting scroll interposed therebetween.

[0007] The main frame includes a scroll support. The scroll support supports the orbiting scroll during the orbiting motion of the orbiting scroll.

[0008] The pivoting scroll includes a pivoting plate portion. The pivoting plate portion is supported by a scroll support portion of the main frame.

[0009] When the orbiting scroll rotates, the upper surface of the scroll support portion of the main frame (hereinafter referred to as the “thrust surface”) can come into contact with the lower surface of the orbiting plate portion of the orbiting scroll. In other words, the thrust surface of the main frame is a support surface that supports the orbiting scroll.

[0010] Hereinafter, the lower surface of the pivot plate of the pivot scroll that can come into contact with the thrust surface of the main frame is called the ‘plate contact surface.’

[0011] Typically, scroll compressors reduce friction that may occur between the thrust surface and the plate contact surface of the orbiting scroll by supplying oil between the thrust surface of the main frame and the plate contact surface of the orbiting scroll.

[0012] Prior Chinese Patent No. 218093430 configures an oil storage groove on the thrust surface of the main frame and forms an oil passage on the contact surface of the plate portion of the orbiting scroll, so that oil is transported through the oil passage of the orbiting scroll to the oil storage groove of the main frame as the orbiting scroll moves. This ensures that oil remains on the thrust surface even when lubrication is not smooth.

[0013] A scroll compressor generally has a structure that supplies oil to the thrust surface of the main frame by stirring the oil by means of a rotating scroll.

[0014] In this way, the oil supply structure of a general scroll compressor that supplies oil to the thrust surface of the main frame is a structure that is formed under the assumption that the contact surface of the plate part of the orbiting scroll is not in complete contact with the thrust surface of the main frame, but rather a gap is created through wobbling motion, etc.

[0015] The oil supply structure of the aforementioned Chinese patent has a problem in that the main frame's thrust surface has an oil storage groove formed, leaving insufficient surface area to support the orbiting scroll. Even if there is no oil supply problem, this increases the likelihood of damage to the main frame's thrust surface or the contact surface of the orbiting scroll's plate.

[0016] That is, the orbiting scroll must move in close contact with the thrust surface of the main frame due to the back pressure formed in the non-orbiting scroll. However, if the thrust surface becomes narrow, the surface pressure increases, causing damage to the thrust surface.

[0017] Additionally, during initial operation of the scroll compressor, the oil storage groove of the main frame may become short of oil, which may increase the likelihood of problems occurring.

[0018] And, in the case of a general scroll compressor, there is no problem if the compressor operates normally and oil is smoothly supplied to the thrust surface of the main frame. However, if the back pressure must be high due to structural reasons, the contact surface of the plate part of the orbiting scroll and the thrust surface of the main frame may operate in complete contact. In this case, a problem may occur in which oil is not smoothly supplied between the contact surface of the plate part of the orbiting scroll and the thrust surface of the main frame.

[0019] The purpose of the present invention is to provide a scroll compressor that can reduce friction loss and improve the support capacity and reliability of the scroll compressor through the formation of an oil film by ensuring smooth lubrication between the thrust surface of the main frame and the contact surface of the plate portion of the orbiting scroll even when the thrust surface of the main frame and the back surface (contact surface of the plate portion) of the orbiting scroll are in complete contact.

[0020] The above-described object of the present invention is achieved by the specific contents described below.

[0021] A scroll compressor according to an embodiment of the present invention includes a main frame, an orbiting scroll, and a non-orbiting scroll. The main frame is fixed to the inside of a casing. The orbiting scroll is supported by the main frame and rotates. The non-orbiting scroll is movably arranged with respect to the main frame with the orbiting scroll interposed therebetween. In addition, the orbiting scroll includes an orbiting plate portion, a rotational shaft coupling portion, and an orbiting wrap. The orbiting plate portion includes a plate portion contact surface supported by the main frame. The rotational shaft coupling portion protrudes from one surface of the orbiting plate portion toward the main frame. The orbiting wrap protrudes from the other surface of the orbiting plate portion at a preset height and is formed in a spiral shape. In addition, a central flow path and a peripheral flow path are formed on the plate portion contact surface. The central flow path surrounds the rotational shaft coupling portion. The peripheral flow path is formed in an arc shape, and both ends communicate with the central flow path. Accordingly, an oil film is formed on the contact surface where the main frame and the orbiting scroll come into contact, thereby reducing loss due to friction.

[0022] Specifically, a plurality of peripheral channels are formed. The plurality of peripheral channels are arranged along the circumference of the pivot plate. Accordingly, oil moves through the peripheral channels, rapidly forming a wide oil film on the thrust surface of the main frame.

[0023] Specifically, in the plurality of peripheral flow paths, the ends of adjacent peripheral flow paths are connected to each other. Accordingly, the ends of the peripheral flow paths can serve as branching portions where oil moves and separates, and confluence portions where oil moves and gathers.

[0024] Specifically, the central flow path and the peripheral flow path are connected to each other to form a closed curve. This allows oil to circulate through the central flow path and the peripheral flow path.

[0025] Specifically, the intermediate portion positioned between the two ends of the peripheral flow path is positioned radially outward from the central flow path of the pivot plate. Accordingly, oil can move to the peripheral flow path and form a wide oil film on the thrust surface of the main frame.

[0026] Specifically, in the central flow path, one side connected to the peripheral flow path is formed to be inclined. Accordingly, oil placed in the central flow path can easily move in the radial direction of the turning plate.

[0027] According to another embodiment of the present invention, a scroll compressor includes a main frame, an orbiting scroll, and a non-orbiting scroll. The main frame is fixed to the inside of a casing. The orbiting scroll is supported by the main frame and rotates. The non-orbiting scroll is movably arranged with respect to the main frame with the orbiting scroll interposed therebetween. In addition, the orbiting scroll includes an orbiting plate portion, a rotational shaft coupling portion, and an orbiting wrap. The orbiting plate portion includes a plate portion contact surface supported by the main frame. The rotational shaft coupling portion protrudes from one surface of the orbiting plate portion toward the main frame. The orbiting wrap protrudes from the other surface of the orbiting plate portion at a preset height and is formed in a spiral shape. In addition, a central channel, a contact surface channel, and a connecting channel are formed on the plate portion contact surface. The central channel surrounds the rotational shaft coupling portion. The contact surface channel is spaced apart from the central channel and surrounds the central channel. The connecting channel connects the central channel and the contact surface channel. Accordingly, the oil can move and circulate through the central flow path, the connecting flow path, and the contact surface flow path.

[0028] Specifically, one end of the connecting passage communicates with the central passage, and the other end of the connecting passage communicates with the contact surface passage. Accordingly, oil in the central passage can move to the contact surface passage through the connecting passage.

[0029] Specifically, a plurality of the above-described connecting channels are formed. The plurality of the connecting channels are spaced apart at a preset distance along the circumference of the pivot plate. Accordingly, oil can quickly move through the connecting channels to the contact surface channels, thereby quickly forming a wide oil film on the thrust surface of the main frame.

[0030] Specifically, the above connecting path is formed in the radial direction of the pivot plate. Accordingly, a wide oil film can be quickly formed on the thrust surface of the main frame.

[0031] Specifically, the connecting passages are arranged in a diagonal shape. This allows the oil in the second central passage to easily move through the connecting passages and reach the contact surface passages.

[0032] Specifically, one side of the central channel connected to the above-mentioned connecting channel is formed to be inclined. This allows oil to easily flow along the inclined side.

[0033] A scroll compressor according to an example of an embodiment of the present invention has the effect of smoothly supplying and circulating oil between the thrust surface of a main frame and the back surface (plate contact surface) of a rotating scroll, which can come into contact with each other.

[0034] In addition, the scroll compressor according to an example of an embodiment of the present invention has the effect of enabling oil to be smoothly supplied between the thrust surface of the main frame and the plate contact surface of the orbiting scroll even when the thrust surface of the main frame and the back surface (plate contact surface) of the orbiting scroll are in complete contact.

[0035] In addition, the scroll compressor according to an example of an embodiment of the present invention has the effect of reducing friction occurring between the thrust surface of the main frame and the contact surface of the plate portion of the orbiting scroll, improving the support force through the formation of an oil film, and improving the reliability of the compressor.

[0036] More detailed effects of the scroll compressor of the present invention are described in the form for implementing the invention below.

[0037] Figure 1 illustrates a scroll compressor according to an example of an embodiment of the present invention.

[0038] Figure 2 is a schematic diagram of a scroll compressor of a fixed pressure type and a structure for supplying oil to the thrust surface of the main frame.

[0039] Figure 3 illustrates the rotating scroll, oldham ring, and main frame of the scroll compressor of the present invention.

[0040] Figure 4 is a perspective view of one side (bottom) of the rotary scroll of Figure 3.

[0041] Figure 5 shows one side (bottom) of the rotary scroll illustrated in Figure 4.

[0042] Figure 6 shows the trajectory of oil appearing on the thrust surface of the main frame according to the rotational movement of the rotational scroll illustrated in Figure 4.

[0043] Figure 7 shows the movement path of oil in the oil path of the rotating scroll shown in Figure 4.

[0044] Fig. 8 is a perspective view of one side (bottom) of a rotary scroll according to an example of another embodiment.

[0045] Figure 9 shows one side (bottom) of the rotary scroll shown in Figure 8.

[0046] Figure 10 shows the trajectory of oil appearing on the thrust surface of the main frame according to the rotational movement of the rotational scroll illustrated in Figure 8.

[0047] Fig. 11 shows an example of an embodiment in which the connecting path of the oil path illustrated in Fig. 8 is formed diagonally.

[0048] Hereinafter, examples of embodiments of the present invention will be described in more detail with reference to the attached drawings. For components of the present invention that are clearly understandable and easily reproducible by those skilled in the art using conventional techniques, a detailed description thereof will be omitted so as not to obscure the gist of the present invention.

[0049] The attached drawings are only provided to facilitate understanding of examples of embodiments disclosed in this specification, and the technical ideas disclosed in this specification are not limited by the attached drawings.

[0050] Singular expressions include plural expressions unless the context clearly indicates otherwise.

[0051] Additionally, terms including ordinal numbers, such as "first" and "second," used herein may be used to describe various components, but these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0052] Below, a scroll compressor according to examples of an embodiment of the present invention is described.

[0053] As explained in the background section, scroll compressors can be categorized into high-pressure and low-pressure scroll compressors, depending on the refrigerant suction path. The following describes a low-pressure scroll compressor, where the internal space of the casing is separated into a low-pressure and high-pressure section by a high- and low-pressure separator, and the refrigerant suction pipe is connected to the low-pressure section.

[0054] In addition, scroll compressors can be divided into two types according to the back pressure method: a non-orbiting back pressure method (fixed back pressure method) that pressurizes a non-orbiting scroll (fixed scroll) toward an orbiting scroll, and a orbiting back pressure method that pressurizes an orbiting scroll toward a non-orbiting scroll. The following description focuses on a scroll compressor according to the non-orbiting back pressure method (fixed back pressure method). However, it should be noted that the present invention can be equally applied to a orbiting back pressure method.

[0055] Additionally, scroll compressors can be divided into two types: vertical scroll compressors, in which the rotational axis is arranged perpendicular to the ground, and horizontal scroll compressors, in which the rotational axis is arranged parallel to the ground. For example, in a vertical scroll compressor, the upper side can be defined as the side opposite to the ground, and the lower side can be defined as the side facing the ground. The following description will be made using a vertical scroll compressor as an example. However, it should be noted that the present invention can be equally applied to a horizontal scroll compressor.

[0056] Additionally, scroll compressors can be categorized into two types: upper compression type and lower compression type, depending on the relative position of the compression unit with respect to the electric motor. The following description focuses on an upper compression type scroll compressor, which is a vertical type and has the compression unit located above the electric motor.

[0057] In addition, scroll compressors can be classified into two types: fixed-radius and variable-radius, depending on the rotation method of the rotating scroll. The following description focuses on variable-radius scroll compressors.

[0058] As illustrated in FIG. 1, in a scroll compressor according to an example of an embodiment of the present invention, a drive motor (120) forming an electric part is provided in the lower half of a casing (110), and a main frame (130), a non-rotating scroll (140), a rotating scroll (150), and a back pressure chamber assembly (160) forming a compression part are provided in the upper part of the drive motor (120).

[0059] The electric part is coupled to one end of the rotary shaft (125), and the compression part is coupled to the other end of the rotary shaft (125). Accordingly, the compression part is connected to the electric part by the rotary shaft (125) and operates by the rotational force of the electric part.

[0060] The casing (110) includes a cylindrical shell (111), an upper cap (112), and a lower cap (113).

[0061] The above cylindrical shell (111) is cylindrical in shape with both upper and lower ends open, and the aforementioned driving motor (120) and main frame (130) are inserted and fixed to the inner surface.

[0062] The above upper cap (112) is coupled to cover the opened upper part of the cylindrical shell (111).

[0063] The lower cap (113) is coupled to cover the opened lower end of the cylindrical shell (111). The rim of a high-low pressure separator (115), which will be described later, is inserted between the cylindrical shell (111) and the upper cap (112) and is welded together to the cylindrical shell (111) and the upper cap (112). The rim of a support bracket, which will be described later, is inserted between the cylindrical shell (111) and the lower cap (113) and is welded together to the cylindrical shell (111) and the lower cap (113). Accordingly, the internal space of the casing (110) can be sealed.

[0064] The high-low pressure separator (115) is fixed to the inside of the casing (110) and divides a low pressure portion (110a) forming an intake space and a high pressure portion (110b) forming a discharge space. A refrigerant suction pipe (117) is connected to the lower side of the high-low pressure separator (115), and a refrigerant discharge pipe (118) is connected to the upper side. As a result, a low pressure portion (110a) forming an intake space can be formed on the lower side of the high-low pressure separator (115), and a high pressure portion (110b) forming an exhaust space can be formed on the upper side.

[0065] The refrigerant suction pipe (117) is connected by penetrating the cylindrical shell (111) in the radial direction, and at this time, the outlet (117a) of the refrigerant suction pipe (117) can be arranged to face the compression section. Some of the refrigerant sucked into the low pressure section (110a) through the refrigerant suction pipe (117) moves upward toward the compression chamber (V) and is sucked directly therein, while the remaining refrigerant moves downward toward the electric motor and can cool the drive motor (120) forming the electric motor.

[0066] The refrigerant discharge pipe (118) penetrates the upper cap (112) in a radial direction and is connected to the upper cap (112). The refrigerant passing through the high-low pressure communication hole (1151a) of the sealing plate (1151) can move along the outer surface of the high-low pressure separator (115) and then be discharged to the outside of the compressor through the refrigerant discharge pipe (118).

[0067] In addition, a through hole (115a) is formed in the center of the high-low pressure separator (115). A sealing plate (1151) from which a floating plate (165) described later is detachably attached is inserted and coupled into the through hole (115a). The low-pressure section (110a) and the high-pressure section (110b) can be blocked by attaching or detaching the floating plate (165) and the sealing plate (1151), or can be communicated through the high-low pressure communication hole (1151a) of the sealing plate (1151).

[0068] The sealing plate (1151) may be formed in an annular shape. For example, a high-low pressure communication hole (1151a) is formed in the center of the sealing plate (1151) to connect the low pressure section (110a) and the high pressure section (110b). The floating plate (165) may be attached or detached along the periphery of the high-low pressure communication hole (1151a).

[0069] In addition, the lower cap (113) forms an oil storage space (110c) together with the lower half of the cylindrical shell (111) forming the low-pressure portion (110a). An oil pickup (126), which will be described later, is locked in the oil storage space (110c), and when the compressor is in operation, the oil stored in the oil storage space (110c) is pumped by the oil pickup (126) and supplied to the wetted portion through the oil passage (125b) of the rotating shaft (125).

[0070] Next, the drive motor will be described.

[0071] Referring again to Figure 1, the drive motor (120) is installed in the lower half of the low-pressure section (110a) and includes a stator (121) and a rotor (122). The stator (121) is fixed to the inner wall surface of the cylindrical shell (111) by hot pressing, and the rotor (122) is provided to be rotatable inside the stator (121).

[0072] The stator (121) includes a stator core (1211) and a stator coil (1212), and the rotor (122) includes a rotor core (1221) and a permanent magnet (1222). The stator (121) and the rotor (122) are well known, and thus a detailed description thereof will be omitted.

[0073] A rotation shaft (125) is press-fitted and joined to the center of the above-mentioned rotor core (1221). An eccentric pin portion (125a) is provided at the upper end of the rotation shaft (125), and a rotary scroll (150) described later is eccentrically joined thereto.

[0074] Meanwhile, the lower end of the rotation shaft (125) is coupled to the rotor (122), and the upper end is coupled to the rotary scroll (150) described later. Accordingly, the rotational power of the driving motor (120) is transmitted to the rotary scroll (150) through the rotation shaft (125).

[0075] An oil passage (125b) is formed through the inside of the rotating shaft (125), and an oil pickup (126) is provided at the lower end of the rotating shaft (125) to suck up oil stored in an oil storage space (110c) of the casing (110). Accordingly, the oil stored in the lower part of the casing (110) is sucked up along the oil passage (125b) of the rotating shaft (125) and moves to the turning space (133), and this oil is scattered by a pressure difference and / or collision with the rotating shaft coupling portion (153) that rotates in the turning space (133) and is supplied to the bearing surface between neighboring members.

[0076] Next, we will explain the main frame.

[0077] The main frame (130) illustrated in Fig. 1 is fixed to the inside of the casing (110) and placed in the low-pressure section (110a). Specifically, the main frame (130) is placed on the upper side of the driving motor (120) and is fixed to the inner wall surface of the cylindrical shell (111) by hot pressing or welding.

[0078] The main frame (130) includes a main flange portion (131), a main bearing portion (132), a rotation space portion (133), a scroll support portion (134), an old ring support portion (135), and a frame fixing portion (136).

[0079] The main flange portion (131) is formed in an annular shape and is accommodated in the low pressure portion (110a) of the casing (110). The outer diameter of the main flange portion (131) is formed smaller than the inner diameter of the cylindrical shell (111), so that the outer surface of the main flange portion (131) is spaced apart from the inner surface of the cylindrical shell (111). In addition, a frame fixing portion (136), which will be described later, protrudes radially from the outer surface of the main flange portion (131). The outer surface of the frame fixing portion (136) is fixedly attached to the inner surface of the casing (110). Accordingly, the main frame (130) is fixedly connected to the casing (110).

[0080] The main bearing part (132) protrudes downward from the center bottom surface of the main flange part (131) toward the driving motor (120). The main bearing part (132) has a cylindrical shaft hole (132a) that penetrates in the axial direction of the rotation shaft. A rotation shaft (125) is inserted into the inner circumferential surface of the shaft hole (132a) and is supported in the radial direction.

[0081] The pivot space (133) is sunken from the center of the main flange portion (131) toward one side (specifically, the main bearing portion (132)) to a preset depth and inner diameter.

[0082] The pivot space (133) is formed to be larger than the outer diameter of the rotation shaft coupling portion (153) provided in the pivot scroll (150) described later. Accordingly, the rotation shaft coupling portion (153) can be pivotally accommodated within the pivot space (133).

[0083] In addition, oil sucked through the rotation shaft (125) is temporarily stored inside the rotation space (133), and this oil can be supplied between the main bearing part (132) and the rotation shaft (125) and / or between the scroll support part (134) and the rotation scroll (150).

[0084] The scroll support (134) is formed in an annular shape along the periphery of the pivot space (133) on the upper surface of the main flange (131). Accordingly, the scroll support (134) supports the lower surface of the pivot plate (151) described later in the axial direction of the rotation axis.

[0085] The Oldham ring support (135) is formed on the outer surface of the scroll support (134) with a height lower than the scroll support (134). Specifically, the Oldham ring support (135) is formed in an annular shape along the outer surface of the scroll support (134) from the upper surface of the main flange (131), but is formed with a height lower than the scroll support (134).

[0086] An Oldham ring (170) is placed on the Oldham ring support (135) to suppress the rotation of the rotary scroll (150) described later. Accordingly, the Oldham ring (170) is inserted into the Oldham ring support (135) and is received so as to be rotatable. A groove (135a) is formed in the Oldham ring support (135) into which the key of the Oldham ring (170) is slidably inserted.

[0087] The frame fixing member (136) is formed on the outer surface of the Oldham ring support member (135) so that the main frame (130) can be fixed to the casing (110). Specifically, the frame fixing member (136) extends radially from the outer surface of the Oldham ring support member (135).

[0088] The frame fixing member (136) extends in a circular shape or is formed by a plurality of protrusions spaced apart at preset intervals along the circumferential direction. Fig. 1 illustrates an example in which the frame fixing member (136) is formed by a plurality of protrusions along the circumferential direction.

[0089] For example, a plurality of frame fixing parts (136) may be arranged to face the guide protrusions (not designated) of the non-rotating scroll (140) described later in the axial direction of the rotation axis, and each of the frame fixing parts (136) may have a respective bolt fastening hole (not designated) corresponding to the guide insertion hole (not designated) of the non-rotating scroll (140) described later in the axial direction of the rotation axis formed through the guide insertion hole (not designated) of the non-rotating scroll (140) described later in the axial direction of the rotation axis.

[0090] A guide bush (137) is placed in the guide insertion hole of the non-rotating scroll (140).

[0091] The guide bush (137) can be formed in a cylindrical shape.

[0092] The guide bushing has a bolt insertion hole (not designated) that penetrates in the longitudinal direction of the guide bushing (137) or in the axial direction of the rotation axis.

[0093] Each guide bolt (138) passes through the bolt insertion hole and is fastened to the bolt fastening hole of the frame fixing member (136). Accordingly, the non-rotating scroll (140) is slidably supported in the axial direction of the rotation axis on the main frame (130) and fixed in the radial direction.

[0094] Next, we will explain non-rotating scrolls.

[0095] The non-orbiting scroll (140) illustrated in Fig. 1 is positioned on top of the main frame (130) with the orbiting scroll (150) described later therebetween. In other words, the non-orbiting scroll (140) is provided to be axially movable with respect to one side of the main frame (130) with the orbiting scroll (150) therebetween. In addition, the non-orbiting scroll (140) forms a compression chamber (V) together with the orbiting scroll (150).

[0096] The non-rotating scroll (140) may be fixedly connected to the main frame (130) or may be connected so as to be movable in the vertical direction. Fig. 1 illustrates an example in which the non-rotating scroll (140) is connected so as to be movable in the axial direction of the rotation axis with respect to the main frame (130).

[0097] The non-rotating scroll (140) includes a non-rotating plate portion (141), a non-rotating wrap (142), a non-rotating side wall portion (143), and a guide protrusion.

[0098] The non-rotating plate portion (141) is formed in a circular plate shape and is arranged transversely from the low pressure portion (110a) of the casing (110). A discharge port (141a), a bypass hole (141b), and a scroll-side back pressure hole (141c) are each formed through the central portion of the non-rotating plate portion (141) in the axial direction of the rotation axis.

[0099] The discharge port (141a) is formed at a position where the discharge pressure chambers (not shown) of the two compression chambers (V) formed on the inner and outer sides of the non-rotating wrap (142) are connected to each other. The bypass hole (141b) is formed to be connected to each of the two compression chambers (V). The scroll-side back pressure hole (141c) is separated from the discharge port (141a) and the bypass hole (141b).

[0100] The scroll-side back pressure hole (141c) is formed in the non-rotating plate portion (141) of the non-rotating scroll (140) and communicates with the compression chamber (V), and the plate-side back pressure hole (1611a) is formed in the back pressure chamber assembly (160) and communicates with the scroll-side back pressure hole (141c) and the back pressure chamber (160a).

[0101] During operation of the compressor, the compressed refrigerant in the compression chamber (V) moves to the back pressure chamber (160a) through the scroll-side back pressure hole (141c) and the plate-side back pressure hole (1611a), and when the compressor stops operating, the refrigerant in the back pressure chamber (160a) moves to the compression chamber (V) through the plate-side back pressure hole (1611a) and the scroll-side back pressure hole (141c).

[0102] The non-rotating wrap (142) extends from the bottom surface of the non-rotating plate portion (141) facing the rotating scroll (150) to a predetermined height in the axial direction of the rotation axis (125), and extends so as to be wound spirally several times around the discharge port (141a) toward the non-rotating side wall portion (143). The non-rotating wrap (142) is formed to correspond to the rotating wrap (152) described below, thereby forming a pair of compression chambers (V) between the non-rotating wrap (142) and the rotating wrap (152).

[0103] The non-rotating side wall portion (143) is formed in a ring shape by extending in the axial direction of the rotation axis (125) from the lower edge of the non-rotating plate portion (141) to wrap the non-rotating wrap (142).

[0104] A non-rotating scroll (140) is provided on one side of the main frame (130) with a rotating scroll (150) in between, and is supported so as to be axially movable with respect to the main frame (130) by having a guide protrusion extending radially from the outer surface (or outer side).

[0105] A guide insertion hole is formed in the guide protrusion that penetrates in the axial direction of the rotation shaft (125), and a guide bush (137) that guides the axial movement of the non-rotating scroll (140) is slidably inserted into the guide insertion hole and supported on the main frame (130).

[0106] The guide protrusion may extend radially from the lower outer circumference of the non-rotating side wall portion (143). The guide protrusion may be formed in a single ring shape, or a plurality of guide protrusions may be formed at preset intervals along the circumferential direction.

[0107] A guide bush (137) is inserted and placed in the guide insertion hole so that it can be supported in the axial direction of the rotation shaft (125) on the upper surface of the frame fixing member (136).

[0108] Next, we will explain the rotating scroll.

[0109] The orbiting scroll (150) is arranged between the main frame (130) and the non-orbiting scroll (140), and is supported by the main frame (130) in the axial direction of the rotational shaft (125) to perform a rotational movement. Specifically, the orbiting scroll (150) is coupled to the rotational shaft (125) and is arranged on the upper surface of the main frame (130). An Oldham ring (170), which is an anti-rotation mechanism, is provided between the orbiting scroll (150) and the main frame (130). Accordingly, the orbiting scroll (150) performs a rotational movement with respect to the non-orbiting scroll (140) while its rotational movement is restricted.

[0110] The rotary scroll (150) includes a rotary plate portion (151), a rotary wrap (152), and a rotary shaft coupling portion (153).

[0111] The pivot plate (151) is formed in a roughly circular shape. The pivot plate (151) is supported in the axial direction of the rotation axis by the scroll support (134) of the main frame (130).

[0112] A groove (151a) into which the key of the old ring (170) is slidably inserted can be formed on the lower surface of the turning plate (151).

[0113] The turning lap (152) forms a compression chamber (V) together with the non-turning lap (142).

[0114] The turning wrap (152) is formed in a spiral shape by protruding from the upper surface of the turning plate (151) facing the non-turning scroll (140) to a preset height.

[0115] The turning wrap (152) is formed to correspond to the non-turning wrap (142) so as to perform a turning motion by interlocking with the non-turning wrap (142) of the non-turning scroll (140).

[0116] The rotary shaft coupling portion (153) protrudes from the lower surface of the pivot plate portion (151) toward the main frame (130).

[0117] The inner circumference of the rotary shaft coupling part (153) is formed in a cylindrical shape, so that a slewing bearing (not shown) made of a bushing bearing can be press-fitted.

[0118] A sliding bush (1155) is rotatably inserted into the inside of the slewing bearing, and an eccentric pin portion (125a) of the rotary shaft (125) described above is slidably inserted into the inside of the sliding bush (1155). Accordingly, the rotational force of the driving motor (120) is transmitted to the rotary shaft coupling portion (153) through the eccentric pin portion (125a) of the rotary shaft (125) and the sliding bush (1155), and the rotational force transmitted to the rotary shaft coupling portion (153) is limited by the Oldham ring (170) to rotate the rotary scroll (150).

[0119] The rotary scroll (150) of the present invention includes an oil passage (154, 155, 155'). A description of the oil passage (154, 155, 155') will be provided later.

[0120] Next, the back pressure chamber assembly is described.

[0121] The back pressure chamber assembly (160) is disposed between the high-low pressure separator (115) and the non-orbiting scroll (140), and has an annular back pressure chamber (160a). Specifically, the back pressure chamber assembly (160) is provided on the upper side of the non-orbiting scroll (140). Accordingly, the back pressure of the back pressure chamber (160a) (more precisely, the force exerted by the back pressure on the back pressure chamber (160a)) acts on the non-orbiting scroll (140). In other words, the non-orbiting scroll (140) is pressed in the direction toward the orbiting scroll (150) by the back pressure to seal the compression chamber (V).

[0122] The back pressure chamber assembly (160) includes a back pressure plate (161) and a floating plate (165).

[0123] The back pressure plate (161) is coupled to the upper surface of the non-rotating plate (141). The floating plate (165) is slidably coupled to the back pressure plate (161) to form a back pressure chamber (160a) together with the back pressure plate (161).

[0124] The back pressure plate (161) includes a fixed plate portion (1611), a first annular wall portion (1612), and a second annular wall portion (1613).

[0125] The above fixed plate (1611) is formed in the shape of a circular plate with a hollow center.

[0126] The fixed plate (1611) includes a plate-side back pressure hole (1611a) formed through the axial direction of the rotation shaft (125). The plate-side back pressure hole (1611a) is a refrigerant passage that connects the back pressure chamber (160a) and the scroll-side back pressure hole (141c).

[0127] The plate-side back pressure hole (1611a) is formed by penetrating from the back pressure chamber (160a) in the direction in which the non-rotating scroll (140) is arranged. In addition, the plate-side back pressure hole (1611a) is connected to the compression chamber (V) through the scroll-side back pressure hole (141c). Accordingly, the plate-side back pressure hole (1611a), together with the scroll-side back pressure hole (141c), connects the compression chamber (V) and the back pressure chamber (160a).

[0128] The first annular wall portion (1612) and the second annular wall portion (1613) surround the inner and outer surfaces of the fixed plate portion (1611) from the upper surface of the fixed plate portion (1611). Accordingly, the outer surface of the first annular wall portion (1612), the inner surface of the second annular wall portion (1613), the upper surface of the fixed plate portion (1611), and the lower surface of the floating plate (165) form an annular pressure relief chamber (160a).

[0129] A middle discharge port (1612a) is formed in the first annular wall portion (1612) to communicate with the discharge port (141a) of the non-rotating scroll (140). A valve guide groove (1612b) is formed on the inside of the middle discharge port (1612a) into which a check valve (hereinafter, discharge valve) (145) is slidably inserted. A backflow prevention hole (1612c) is formed in the center of the valve guide groove (1612b). Accordingly, the discharge valve (145) selectively opens and closes between the discharge port (141a) and the middle discharge port (1612a) to prevent the discharged refrigerant from flowing back into the compression chamber (V).

[0130] The floating plate (165) is formed in an annular shape and can be made of a material lighter than the back pressure plate (161). Accordingly, the floating plate (165) is detachably coupled to the lower surface of the high-low pressure separator (115) while moving in the axial direction of the rotation axis with respect to the back pressure plate (161) according to the pressure of the back pressure chamber (160a). For example, when the floating plate (165) comes into contact with the high-low pressure separator (115), it serves to seal the discharged refrigerant so that it does not leak to the low pressure section (110a) but is discharged to the high pressure section (110b).

[0131] The scroll compressor according to the examples of the embodiments of the present invention described above operates as follows.

[0132] When power is applied to the drive motor (120), the orbiting scroll (150) coupled to the rotation shaft (125) rotates relative to the non-orbiting scroll (140), and a pair of compression chambers (V) are formed between the orbiting wrap (152) and the non-orbiting wrap (142).

[0133] The compression chamber (V) gradually reduces in volume as it moves from the outside to the inside according to the rotational movement of the rotating scroll (150). At this time, the refrigerant is sucked into the low-pressure part (110a) of the casing (110) through the refrigerant suction pipe (117), and a portion of this refrigerant is directly sucked into each suction pressure chamber (not symbol) forming both compression chambers (V), while the remainder moves toward the drive motor (120), cools the drive motor (120), and is then sucked into the suction pressure chamber (not symbol).

[0134] The refrigerant sucked into the suction chamber (not shown) is compressed as it moves toward the intermediate chamber and the discharge chamber (not shown) along the path of the compression chamber (V). The refrigerant moving to the discharge chamber (not shown) pushes the discharge valve (145) and is discharged to the high pressure section (110b) through the discharge port (141a) and the intermediate discharge port (1612a), and this refrigerant fills the high pressure section (110b) and then is discharged through the refrigerant discharge pipe (118) through the condenser of the refrigeration cycle, repeating a series of processes.

[0135] Meanwhile, another portion of the refrigerant compressed while passing through the intermediate pressure chamber (not shown) also flows into the pressure chamber (160a) through the scroll-side pressure relief hole (141c) before reaching the discharge port (141a), so that the pressure chamber (160a) forms an intermediate pressure. Then, the floating plate (165) rises toward the high-low pressure separation plate (115) and comes into close contact with the sealing plate (1151) provided on the high-low pressure separation plate (115), and the pressure relief plate (161) is lowered by the pressure of the pressure relief chamber (160a) in the direction toward the non-orbiting scroll (140), thereby pressurizing the non-orbiting scroll (140) toward the orbiting scroll (150).

[0136] In the operation process of the scroll compressor described above, the orbiting scroll (150) moves irregularly on the thrust surface (1341) of the main frame (130) depending on the back pressure, or when the back pressure is high, the back surface of the orbiting scroll (150) comes into complete contact with the upper surface of the scroll support part (134) of the main frame (130). The upper surface of the scroll support part (134) of the main frame (130) is called the 'thrust surface (1341)', and the back surface of the orbiting scroll (150) represents one surface (e.g., the lower surface) (1511) of the orbiting plate part (151) that can come into contact with the thrust surface (1341) of the main frame (130) (see FIG. 3).

[0137] When the rotating scroll (150) moves irregularly, the oil loaded in the rotating space (133) of the main frame (130) is stirred by the rotating movement of the rotational shaft coupling portion (153) of the rotating scroll (150) and supplied to the thrust surface (1341) of the main frame (130) (see FIG. 2).

[0138] However, when the thrust surface (1341) of the main frame (130) and one side (1511) of the turning scroll (150) are in complete contact with each other due to high back pressure, the oil loaded in the turning space (133) of the main frame (130) is not smoothly supplied to the thrust surface (1341) of the main frame (130).

[0139] Accordingly, even when the thrust surface (1341) of the main frame (130) and one side (1511) of the turning scroll (150) are in complete contact, the oil loaded in the turning space (133) of the main frame (130) needs to be smoothly supplied to the thrust surface (1341) of the main frame (130).

[0140] A scroll compressor according to examples of an embodiment of the present invention ensures that oil is smoothly supplied to the thrust surface (1341) of the main frame (130) even when one surface (1511) of an orbiting scroll (150) that is pressed against the main frame (130) by the back pressure formed on the back surface of a non-orbiting scroll (140) is completely pressed against the thrust surface (1341) of the main frame (130) that supports it. This will be described in detail below.

[0141] As shown in Fig. 3, the pivot plate portion (151) of the aforementioned pivot scroll (150) includes one side (e.g., lower side) (1511) and the other side (e.g., upper side) (1512). The one side (1511) and the other side (1512) are surfaces facing in opposite directions with the thickness of the pivot plate portion (151) interposed therebetween.

[0142] A rotating shaft coupling portion (153) is formed on one side (1511) of the rotating plate portion (151), and a rotating wrap (152) is formed on the other side (1512) of the rotating plate portion (151). One side (1511) of the rotating plate portion (151) faces the main frame (130).

[0143] Meanwhile, the scroll support (134) of the main frame (130) supports the rotating scroll (150) during the rotating movement of the rotating scroll (150). Specifically, the scroll support (134) supports the rotating plate (151) of the rotating scroll (150).

[0144] When the rotary scroll (150) rotates, the upper surface (1341) (see FIG. 3) of the scroll support (134) of the main frame (130) can come into contact with one surface (e.g., the lower surface) (1511) of the rotary plate (151) of the rotary scroll (150).

[0145] When the rotating scroll (150) rotates, the upper surface (1341) of the scroll support portion (134) that can come into contact with one surface (1511) of the rotating plate portion (151) is called a 'thrust surface (1341)'. The thrust surface (1341) is a support surface that supports the rotating scroll (150) (specifically, the rotating plate portion (151)).

[0146] And, the drawing symbol 1511a shown in Fig. 4 represents a 'plate contact surface'. The plate contact surface (1511a) represents a surface (or area) among one surface (1511) of the rotating plate (151) that can come into contact with the thrust surface (1341) of the scroll support (134).

[0147] Figures 4 to 7 illustrate examples of a first embodiment of an oil path (154) formed in a rotating scroll (150) (first oil path).

[0148] Referring to FIGS. 4 to 7, the rotating scroll (150) includes an oil passage (first oil passage) (154).

[0149] The first oil passage (154) is a passage through which oil flows.

[0150] The first oil passage (154) is formed on the plate contact surface (1511a) of the orbiting scroll (150). Accordingly, when the orbiting scroll (150) rotates, the first oil passage (154) does not extend beyond the outer edge of the thrust surface (1341) of the main frame (130). The outer edge of the thrust surface (1341) refers to an edge of the thrust surface (1341) that is arranged on the side of the Oldham ring support (135) of the main frame (130). Conversely, the inner edge of the thrust surface (1341) refers to an edge of the thrust surface (1341) that is arranged on the side of the orbiting space (133) of the main frame (130).

[0151] The first oil passage (154) is formed in a groove shape.

[0152] Specifically, the first oil channel (154) is formed by being sunk to a preset depth from the plate contact surface (1511a). In addition, the first oil channel (154) has a preset width from the plate contact surface (1511a). According to an example of an embodiment, the preset width may gradually narrow toward the bottom of the oil channel (groove).

[0153] Even when the thrust surface (1341) of the main frame (130) and the plate contact surface (1511a) of the pivoting scroll (150) are in complete contact during the pivoting movement of the pivoting scroll (150), the oil loaded in the pivoting space (133) of the main frame (130) smoothly reaches the thrust surface (1341) of the main frame (130) by the first oil path (154) formed in the pivoting scroll (150), so that an oil film is formed on the thrust surface (1341).

[0154] The first oil passage (154) includes a central passage (first central passage) (1541) and a peripheral passage (1542). The first central passage (1541) is formed on the radially inner side of the turning plate (151), and the peripheral passage (1542) is formed on the radially outer side of the turning plate (151).

[0155] The first central euro (1541) surrounds the rotation axis coupling (153).

[0156] The first central euro (1541) may be formed in a ring shape along the circumference of the rotating scroll (150) (specifically, the rotating plate portion (151)). A rotating shaft coupling portion (153) is arranged inside the ring.

[0157] The first central euro (1541) has a preset width and depth as described above.

[0158] Oil loaded in the rotating space (133) of the main frame (130) is stirred by the rotating motion of the rotating scroll (150) and reaches the first central oil path (1541).

[0159] The first central euro (1541) communicates with the peripheral euro (1542).

[0160] According to an example of an embodiment of the present invention, a portion of the first central flow path (1541) that is connected to the peripheral flow path (1542) may be formed as an inclined surface (1541a).

[0161] That is, in the first central flow path (1541), the side surface (1541a) disposed radially outwardly of the turning scroll (150) (specifically, the turning plate portion (151)) can be formed to be inclined. As a result, the oil in the first central flow path (1541) can easily move to the peripheral flow path (1542) and / or the plate portion contact surface (1511a) of the turning plate portion (151).

[0162] In detail, in the first center euro (1541), the side disposed radially inward of the rotating scroll (150) may be a part of the side of the rotation shaft coupling portion (153).

[0163] The peripheral euro (1542) is connected to the first central euro (1541).

[0164] The surrounding euro (1542) also has a preset width and depth.

[0165] The peripheral flow path (1542) is formed in a belt shape (a narrow and long shape) of a preset length. The preset length of the peripheral flow path (1542) is formed on the contact surface (1511a) of the plate portion and along the circumferential direction of the rotating plate portion (151).

[0166] The peripheral euro (1542) includes one end (1542a), the other end (1542b), and the middle part (1542c) (see Fig. 5).

[0167] One end (1542a) and the other end (1542b) of the peripheral flow path (1542) represent the two ends of the peripheral flow path (1542).

[0168] And, the middle part (1542c) of the peripheral flow path (1542) is positioned between one end (1542a) and the other end (1542b) of the peripheral flow path (1542), and is connected to the one end (1542a) and the other end (1542b). That is, one of the two ends of the middle part (1542c) is connected to one end (1542a) of the peripheral flow path (1542), and the other is connected to the other end (1542b) of the peripheral flow path (1542).

[0169] One end (1542a) and the other end (1542b) of the peripheral flow path (1542) are each connected to the first central flow path (1541).

[0170] According to an example of an embodiment of the present invention, one end (1542a) and the other end (1542b) of the peripheral flow path (1542) communicate with a side surface (inclined side surface) (1541a) disposed radially outwardly of the orbiting scroll (150) among the first central flow paths (1541). As a result, oil reaching the first central flow path (1541) smoothly moves along the inclined side surface (1541a) to the peripheral flow path (1542) and between one surface (plate contact surface (1511a)) of the neighboring orbiting plate portion (151) and the thrust surface (1341) of the main frame (130) facing the plate contact surface (1511a).

[0171] The peripheral portion (1542) (specifically, the middle portion (1542c)) may be formed in an arc shape. The arc shape may be, for example, a circular arc shape or an elliptical arc shape. As the middle portion (1542c) is formed in an arc shape, oil can smoothly move along the middle portion (1542c).

[0172] The middle portion (1542c) of the peripheral euro (1542) is spaced from the first central euro (1541) by a preset distance in the radial direction of the turning scroll (150) (specifically, the turning plate portion).

[0173] In the radial direction of the rotating scroll (150), the distance between each end of the middle portion (1542c) and the first central passage (1541) is formed to be shorter than the distance between the center of the middle portion (1542c) and the first central passage (1541).

[0174] The first central flow path (1541) and the peripheral flow paths (1542) are connected to each other to form a closed curve, and one surface (the plate contact surface (1511a)) of the turning plate part (151) is located inside the closed curve. Since one surface (the plate contact surface (1511a)) of the turning plate part (151) located inside the closed curve is supported by the thrust surface (1341) of the main frame (130), the turning plate part (151) can perform a stable turning movement.

[0175] The surrounding euro (1542) is formed in multiples.

[0176] A plurality of peripheral passages (1542) are arranged along the circumference of the turning plate (151), and the ends of neighboring peripheral passages (1542) are connected to each other.

[0177] For example, the plurality of peripheral flow paths (1542) include a first peripheral flow path (1542) and a second peripheral flow path (1542) that are adjacent to each other. One end (e.g., the other end) of the first peripheral flow path (1542) is connected to one end (e.g., one end) of the second peripheral flow path (1542).

[0178] In addition, among the plurality of peripheral flow paths (1542), the first peripheral flow path (1542) and the last peripheral flow path (1542), the nth peripheral flow path (1542), are connected. The nth peripheral flow path (1542) represents, for example, the sixth peripheral flow path (1542) when six peripheral flow paths (1542) are formed. One end (e.g., one end) of the first peripheral flow path (1542) is connected to one end (e.g., the other end) of the sixth peripheral flow path (1542).

[0179] According to another embodiment of the present invention, a plurality of peripheral channels (1542) are arranged along the circumferential direction of the pivot plate (151), but each end of the neighboring peripheral channels (1542) is not connected to each other and may be arranged spaced apart from each other (not shown).

[0180] As a plurality of peripheral flow paths (1542) are arranged along the circumference of the turning plate (151), a plurality of closed curves connected to the first center flow path (1541) and the peripheral flow paths (1542) are arranged along the circumference of the turning plate (151).

[0181] Since one side of a turning plate (151) (plate contact surface (1511a)) is arranged inside each of the above-mentioned plurality of closed curves, the turning scroll (150) is stably supported by the thrust surface (1341) of the main frame (130).

[0182] Meanwhile, the portion where the ends of the adjacent peripheral flow paths (1542) are connected may have a width wider than that of the peripheral flow paths (1542). This allows smooth movement of oil.

[0183] Oil loaded in the rotating space (133) of the main frame (130) is stirred by the rotating motion of the rotating scroll (150) and moves to the first central passage (1541) of the rotating scroll (150), and the oil moved to the first central passage (1541) moves to the peripheral passage (1542) that is connected to the first central passage (1541) (see Fig. 7).

[0184] Accordingly, an oil trajectory (OT1) corresponding to the outer shape of the oil path (first oil path) (154) formed in the rotating scroll (150) is formed on the thrust surface (1341) of the main frame (130) (see Fig. 6).

[0185] While the orbiting scroll (150) rotates, oil that has moved to the oil passage (first oil passage) (154) is also supplied to the thrust surface (1341) of the main frame (130) facing one side (plate contact surface (1511a)) of the orbiting plate portion (151) surrounded by the first central passage (1541) and the peripheral passages (1542), so that an oil film is formed on the thrust surface (1341). The oil film reduces friction between the plate contact surface (1511a) of the orbiting scroll (150) and the thrust surface (1341) of the main frame (130), thereby reducing damage to the plate contact surface (1511a) and / or the thrust surface (1341).

[0186] Figure 7 roughly shows the movement path of oil moving in the oil path (first oil path) (154).

[0187] In a plurality of peripheral channels (1542), the connected ends of the neighboring peripheral channels (1542) may be branches where oil that has moved along the first central channel (1541) separates and moves to the neighboring peripheral channels (1542). In addition, the other connected ends of the neighboring peripheral channels (1542) may be junctions where oil that has moved and separated to the neighboring peripheral channels (1542) meet.

[0188] Oil loaded in the pivot space (133) of the main frame (130) is stirred by the pivoting motion of the pivot scroll (150) and reaches the first central passage (1541). Then, the oil that has reached the first central passage (1541) can move to the peripheral passage (1542) and the thrust surface (1341) of the main frame (130) and then back to the first central passage (1541). Then, the oil that has moved to the first central passage (1541) can move to the pivot space (133) of the main frame (130).

[0189] In this way, the oil loaded in the turning space (133) moves and goes through a recovery process of moving back to the turning space (133), so the oil does not accumulate on the thrust surface (1341) but circulates.

[0190] Due to this, the oil carbonization phenomenon that may occur due to oil accumulating on the thrust surface (1341) can be suppressed, and the problem of the oil viscosity becoming weak can be improved.

[0191] Figures 8 to 10 illustrate examples of a second embodiment of an oil path (155) formed in a rotating scroll (150) (second oil path).

[0192] Referring to FIGS. 8 to 10, the rotating scroll (150) includes an oil passage (second oil passage) (155).

[0193] The second oil passage (155) is a passage through which oil flows, similar to the first oil passage (154) described above.

[0194] In describing the second oil passage (155) below, a configuration or part that is distinct from the first oil passage (154) described above is specifically described, and the same or similar configuration or part is replaced with the description of the first oil passage (154) described above.

[0195] The second oil euro (155) is formed on the plate contact surface (1511a) of the rotating scroll (150) and is formed in a groove shape.

[0196] The second oil passage (155) is formed by being sunk to a preset depth from the plate contact surface (1511a). In addition, the second oil passage (155) has a preset width from the plate contact surface (1511a). According to an example of an embodiment, the preset width may gradually narrow toward the bottom of the oil passage (155) (groove).

[0197] Even when the thrust surface (1341) of the main frame (130) and the contact surface (1511a) of the plate portion of the turning scroll (150) are in complete contact during the turning movement of the turning scroll (150), the oil loaded in the turning space (133) of the main frame (130) smoothly reaches the thrust surface (1341) of the main frame (130) by the second oil path (155) formed in the turning scroll (150), so that an oil film is formed on the thrust surface (1341).

[0198] The second oil passage (155) includes a center passage (second center passage) (1551), a contact passage (1552), and a connecting passage (1553). The second center passage (1551) is formed on the radially inner side of the turning plate portion (151), and the contact passage (1552) is formed on the radially outer side of the turning plate portion (151).

[0199] The second central euro (1551) is the same as the central euro (first central euro) (1541) of the first oil euro (154) described above, so its description is omitted.

[0200] The contact surface flow path (1552) surrounds the second center flow path (1551). Accordingly, the second center flow path (1551) is arranged inside the contact surface flow path (1552).

[0201] The contact surface euro (1552) has a preset width and depth and can be formed in an annular shape along the circumference of the turning scroll (150) (specifically, the turning plate portion (151)). A second central euro (1551) is arranged inside the annular shape.

[0202] The contact surface euro (1552) and the second center euro (1551) are spaced apart by a preset distance in the radial direction of the turning plate (151).

[0203] The connecting passage (1553) has a preset width, depth, and length. The preset length of the connecting passage (1553) is formed in the radial direction of the pivot plate (151).

[0204] The connecting euro (1553) connects the second center euro (1551) and the contact surface euro (1552).

[0205] The connecting euro (1553) includes one end (1553a), the other end (1553b), and the middle part (1553c).

[0206] One end (1553a) and the other end (1553b) of the connecting passage (1553) represent the two ends of the connecting passage (1553) in the longitudinal direction of the connecting passage (1553).

[0207] And, the middle part (1553c) of the connecting passage (1553) is placed between one end (1553a) and the other end (1553b) of the connecting passage (1553), and is connected to the one end (1553a) and the other end (1553b). That is, one of the two ends of the middle part (1553c) is connected to one end (1553a) of the connecting passage (1553), and the other is connected to the other end (1553b) of the connecting passage (1553).

[0208] One end (1553a) of the connecting passage (1553) communicates with the second central passage (1551), and the other end (1553b) of the connecting passage (1553) communicates with the contact surface passage (1552).

[0209] The connecting euro (1553) is formed in multiples.

[0210] A plurality of connecting euros (1553) are arranged at a preset distance along the circumference of the turning scroll (150) (specifically, the turning plate (151)).

[0211] As a plurality of connecting channels (1553) are arranged spaced apart from each other along the circumference of the turning plate (151), a plurality of closed curves are arranged along the circumference of the turning plate (151). The plurality of closed curves represent a plurality of oil channels connected to the second central channel (1551), the adjacent connecting channels (1553), and the contact surface channel (1552).

[0212] Since one side of a turning plate (151) (plate contact surface (1511a)) is arranged inside each of the above-mentioned plurality of closed curves, the turning scroll (150) is stably supported by the thrust surface (1341) of the main frame (130).

[0213] When the rotating scroll (150) rotates, the oil that reaches the second center passage (1551) moves along the connecting passage (1553) and moves to the contact surface passage (1552).

[0214] Accordingly, the oil passage (second oil passage) (155) is filled with oil, and the oil is supplied to the thrust surface (1341) of the main frame (130), and an oil film is formed between the plate contact surface (1511a) of the rotating scroll (150) and the thrust surface (1341) of the main frame (130).

[0215] That is, on the thrust surface (1341) of the main frame (130), an oil trajectory (OT2) corresponding to the outer shape of the oil path (second oil path) (155) formed in the rotating scroll (150) is formed (see Fig. 10).

[0216] While the orbiting scroll (150) rotates, the oil that has moved to the oil passage (second oil passage) (155) is also supplied to the thrust surface (1341) of the main frame (130) facing one side (the plate contact surface (1511a)) of the orbiting plate portion (151) surrounded by the second central passage (1551), the adjacent connecting passage (1553) and the contact surface passage (1552), so that an oil film is formed on the thrust surface (1341). The oil film reduces friction between the plate contact surface (1511a) of the orbiting scroll (150) and the thrust surface (1341) of the main frame (130), thereby reducing damage to the plate contact surface (1511a) and / or the thrust surface (1341).

[0217] Oil loaded in the pivot space (133) of the main frame (130) is stirred by the pivoting motion of the pivot scroll (150) and reaches the second central flow path (1551). Then, the oil that reaches the second central flow path (1551) can move to the connecting flow path (1553), the contact surface flow path (1552), and the thrust surface (1341) of the main frame (130) and then move back to the second central flow path (1551). Then, the oil that has moved to the second central flow path (1551) can move to the pivot space (133) of the main frame (130).

[0218] In this way, the oil loaded in the turning space (133) moves and goes through a recovery process of moving back to the turning space (133), so the oil does not accumulate on the thrust surface (1341) but circulates.

[0219] Due to this, the oil carbonization phenomenon that may occur due to oil accumulating on the thrust surface (1341) can be suppressed, and the problem of the oil viscosity becoming weak can be improved.

[0220] Meanwhile, the connecting euro (1553) can be formed in the radial direction of the turning scroll (150) (specifically, the turning plate portion (151)), as shown in FIGS. 8 and 9.

[0221] And, as illustrated in Fig. 11, the connecting passage (1553') may be formed in the radial direction of the pivot plate (151), and may be formed (or arranged) in a diagonal shape (a line shape drawn diagonally). The diagonal shape starts from the second center passage (1551) and reaches the contact surface passage (1552), and the direction of the diagonal line may be consistent with the direction of rotation of the pivot scroll (150). As a result, the oil in the second center passage (1551) can quickly move through the connecting passage (1553') and reach the contact surface passage (1552).

[0222] The oil passage (third oil passage) (155') illustrated in Fig. 11 is different from the oil passage (second oil passage) (155) illustrated in Figs. 8 and 9 only in the shape of the connecting passages (1553, 1553'), and the center passage (1551) and the contact surface passage (1552) are identical to each other.

[0223] The connecting passages (1553, 1553') may be formed in a straight shape, as illustrated in FIGS. 8, 9, and 11. This is to minimize the length of the connecting passages (1553, 1553') and thereby minimize the travel time of the oil reaching the contact surface passage (1552).

[0224] Although not shown, according to an example embodiment of the present invention, the connecting passage (1553, 1553') may be formed in a curved or spiral shape. This is to increase the length of the connecting passage (1553, 1553') so that more oil can reach the thrust surface (1341) of the main frame (130) through the connecting passage (1553, 1553').

Claims

1. Main frame fixed inside the casing; A rotating scroll supported on the main frame and rotating; and A non-rotating scroll is disposed movably with respect to the main frame with the above-mentioned rotating scroll interposed therebetween, The above rotating scroll is, It includes a pivot plate part including a pivot plate contact surface supported by the main frame, a rotary shaft coupling part protruding from one surface of the pivot plate part toward the main frame, and a pivot wrap formed in a spiral shape by protruding at a preset height from the other surface of the pivot plate part. On the contact surface of the above plate, a central flow path surrounding the above-mentioned rotary shaft coupling portion; and A scroll compressor formed in the shape of an arc, and having peripheral channels formed at both ends communicating with the central channel.

2. In paragraph 1, The above peripheral euros are formed in multiple numbers, A scroll compressor, wherein a plurality of the peripheral vortices are arranged along the circumferential direction of the rotating plate.

3. In paragraph 2, A scroll compressor in which the ends of adjacent peripheral passages are connected to each other in a plurality of the peripheral passages.

4. In paragraph 1, A scroll compressor in which the central flow path and the peripheral flow path are connected to each other to form a closed curve.

5. In paragraph 1, A scroll compressor, wherein the intermediate portion disposed between the two ends of the peripheral flow path is disposed radially outward from the central flow path of the rotating plate portion.

6. In paragraph 1, A scroll compressor in which one side of the central flow path connected to the peripheral flow path is formed to be inclined.

7. Main frame fixed inside the casing; A rotating scroll supported on the main frame and rotating; and A non-rotating scroll is disposed movably with respect to the main frame with the above-mentioned rotating scroll interposed therebetween, The above rotating scroll is, It includes a pivot plate part including a pivot plate contact surface supported by the main frame, a rotary shaft coupling part protruding from one surface of the pivot plate part toward the main frame, and a pivot wrap formed in a spiral shape by protruding at a preset height from the other surface of the pivot plate part. On the contact surface of the above plate, A central passage surrounding the above-mentioned rotary shaft coupling portion; A contact surface flow path spaced apart from the central flow path and surrounding the central flow path; and A scroll compressor, wherein a connecting passage is formed to connect the central passage and the contact surface passage.

8. In paragraph 7, A scroll compressor, wherein one end of the connecting passage communicates with the central passage, and the other end of the connecting passage communicates with the contact surface passage.

9. In paragraph 8, The above connecting euro is formed in multiple numbers, A scroll compressor, wherein a plurality of the above connecting passages are arranged at a preset distance along the circumferential direction of the above turning plate.

10. In paragraph 8, A scroll compressor, wherein the above connecting path is formed in the radial direction of the above turning plate portion.

11. In paragraph 8, A scroll compressor in which the above connecting euros are arranged in a diagonal shape.

12. In paragraph 7, A scroll compressor in which one side connected to the connecting passage is formed to be inclined in the central passage.

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