Scroll compressor

Abstract

The present invention relates to a scroll compressor. Each scroll wrap of the scroll compressor may include an outer section, a connection section, and a central section. The central section may include a plurality of circular arcs connected continuously. Accordingly, it is possible to reduce noise and / or improve performance while expanding the stroke volume, and while forming respective wrap sections in different shapes, the degree of freedom of the design for interconnecting the sections can be increased.

Description

scroll compressor

[0001] The present invention relates to a scroll compressor, and more particularly to a wrap shape.

[0002] Compressors used in refrigeration cycles such as air conditioners compress refrigerant gas and transmit it to the condenser. Rotary compressors or scroll compressors are commonly used in air conditioners.

[0003] Scroll compressors achieve a relatively high compression ratio compared to other types of compressors, and their smooth refrigerant intake, compression, and discharge cycles yield stable torque. Consequently, scroll compressors are widely used for refrigerant compression in air conditioning systems and other applications. Recently, scroll compressors are also being used in water heater compressors, which require even higher compression ratios than air conditioners.

[0004] These scroll compressors have a fixed scroll (or non-orbiting scroll) and an orbiting scroll that mesh with each other to form a pair of compression chambers. In other words, the fixed scroll has a spiral fixed wrap, and the orbiting scroll has a spiral orbiting wrap, and the fixed wrap and the orbiting wrap are formed symmetrically so as to mesh with each other. Accordingly, two pairs of compression chambers are formed between the fixed wrap and the orbiting wrap, which continuously narrow as they move from the outer periphery toward the center, and the refrigerant is sucked in from the outer periphery, compressed as it moves toward the center, and then discharged.

[0005] Recently, as scroll compressors have become larger and / or faster, various technologies have been introduced to maximize compression capacity while maintaining and / or minimizing the compressor's external size. For example, circular wraps, in which the fixed and orbital wraps are formed in an arc shape, or hybrid wraps, in which the fixed and orbital wraps each have multiple curved surfaces, are well known.

[0006] The circular wrap, in which the entire wrap profile is formed in an arc shape, maximizes the stroke volume without increasing the external appearance of the scroll compressor. However, maximizing the stroke volume of the circular wrap creates irregularities in the contact area between the fixed and orbiting wraps. This increases gas force fluctuations in the center (or central section), potentially compromising noise and / or stability.

[0007] On the other hand, a hybrid wrap is one in which the wrap profile is formed by multiple curves. For example, the outer section of the hybrid wrap can be formed by a circular arc wrap, the central section by a logarithmic spiral wrap, and the connecting section connecting the outer section and the central section by a polynomial curve wrap.

[0008] These hybrid wraps maintain the advantages of circular wraps while overcoming their shortcomings. Specifically, the outer section of the hybrid wrap is formed as an arc, maximizing compression capacity compared to other shapes. The central section is formed as a logarithmic spiral, minimizing gas force fluctuations in the central section, reducing noise and enhancing stability.

[0009] However, conventional hybrid wraps, such as the one described above, may have limited design freedom for the connecting section connecting the outer and central sections, as the connecting section is formed as a polynomial curve wrap. Despite the potential to increase the administrative volume in the outer section while simultaneously reducing noise and / or improving performance in the central section, this can hinder actual commercialization.

[0010] The purpose of the present invention is to provide a scroll compressor capable of reducing noise and / or improving performance while increasing the administrative volume.

[0011] Another object of the present invention is to provide a scroll compressor having a wrap shape that can reduce noise and / or improve performance while increasing the administrative volume.

[0012] Another object of the present invention is to provide a scroll compressor capable of increasing the stroke volume in the outer section of the wrap while reducing the fluctuation range of gas force in the central section of the wrap.

[0013] Another object of the present invention is to provide a scroll compressor in which each section of the wrap can be easily connected.

[0014] Another object of the present invention is to provide a scroll compressor that can increase the degree of design freedom for forming each section of the wrap into a different shape while connecting these sections to each other.

[0015] In order to achieve the object of the present invention, a scroll compressor may include a first scroll having a first wrap; and a second scroll having a second wrap coupled to a rotating shaft so as to perform a rotational motion and meshed with the first wrap to form a compression chamber. The first wrap and the second wrap may each include an outer section; a central section located closer to the center of the wrap than the outer section; and a connecting section connecting the outer section and the central section. The central section may be formed by continuously connecting a plurality of circular arcs. Through this, it is possible to increase the stroke volume while reducing noise and / or improving performance, and to increase the degree of design freedom for forming each section of the wrap with different shapes while connecting these sections to each other.

[0016] For example, the multiple circular arcs forming the outer and inner surfaces of the central section can be formed such that two adjacent circular arcs have different arc centers. This allows the central section to be formed in a manner that appropriately reduces the variation in gas force, similar to an involute curve, while also increasing the degree of design freedom for connecting the central section and the connecting section.

[0017] As another example, the plurality of circular arcs forming the outer and inner surfaces of the central section may be formed such that the radius of curvature of the circular arc adjacent to the connection section among the two adjacent circular arcs is larger than the radius of curvature of the circular arc farther from the connection section. Through this, the central section becomes farther from the center of the wrap as it moves from the discharge side to the suction side, thereby increasing the degree of design freedom for connecting the central section and the connection section.

[0018] As another example, the plurality of circular arcs forming the outer and inner surfaces of the central section may be formed so that the arc lengths of adjacent circular arcs are different. This allows for simplifying the manufacturing process for the central section by minimizing the number of circular arcs while maintaining the same overall length of the central section, or for further increasing the degree of design freedom for connecting the central section to the connecting section by maximizing the number of circular arcs.

[0019] For example, the multiple circular arcs forming the central section can be formed such that the length of each arc gradually increases as it moves toward the connecting section. This can minimize the number of circular arcs while maintaining the same overall length of the central section, thereby simplifying the manufacturing process for the central section.

[0020] As another example, the multiple circular arcs forming the outer and inner surfaces of the central section can be formed with the same arc lengths. This facilitates the derivation of the baseline (171) and further increases the degree of design freedom for connecting the central section to the connecting section.

[0021] As another example, the plurality of circular arcs forming the outer and inner surfaces of the central section may be formed such that the length of each circular arc gradually decreases as it moves toward the connecting section. This allows the number of circular arcs to increase as it moves toward the connecting section, thereby further increasing the degree of design freedom for connecting the central section to the connecting section.

[0022] As another example, the first lap and the second lap may be offset outward and inward by a preset distance from a baseline, so that an outer surface and an inner surface of each lap may be formed. The baseline in the central section may include a plurality of reference circles, including a first reference circle, a second reference circle, and a third reference circle, which may be sequentially arranged at a preset distance. A plurality of inscribed circles may be sequentially arranged, including a first inscribed circle inscribed by the first reference circle and the second reference circle, and a second inscribed circle inscribed by the first inscribed circle and the third reference circle. A plurality of arcs may be sequentially arranged, including a first arc between both contact points where the first reference circle and the second reference circle are in contact with each other on the circumference of the first inscribed circle, and a second arc between both contact points where the first arc and the third reference circle are in contact with each other on the circumference of the second inscribed circle. Part of each of the plurality of circular arcs, including a part of the first circular arc and a part of the second circular arc, may be formed by connecting them to each other. This allows for increased design freedom in connecting the sections of the fixed wrap and / or the rotating wrap while forming them with different curves.

[0023] For example, the multiple reference circles may be formed with identical inner diameters. This allows for a more curved wrap angle of the reference line, thereby increasing the degree of design freedom by minimizing the variation in gas force in the central section.

[0024] Specifically, the plurality of reference circles may be formed such that their inner diameters gradually decrease or increase as they move toward the outer section. This allows the baseline's wrap angle to become more gentle, minimizing the length of the central section and thus reducing design costs, or maximizing the length of the central section and thus extending the compression cycle.

[0025] More specifically, the plurality of reference circles may be arranged along a single reference curve extending spirally from an arbitrary base circle. This allows for the multiple reference circles to be arranged uniformly along a single reference curve, facilitating the derivation of a baseline. Furthermore, the curve forming the baseline is formed to approximate an involute curve, minimizing the fluctuation range of gas force, thereby reducing noise and / or improving performance.

[0026] In addition, the plurality of reference circles may be formed by arranging a plurality of reference straight lines extending radially from the lap center of the first lap or the lap center of the second lap toward the reference curve, and centering on a plurality of intersection points where the plurality of reference straight lines intersect the reference curve. This allows for easy drawing of a plurality of reference circles, thereby increasing the degree of design freedom.

[0027] Additionally, the plurality of reference straight lines may be formed such that the central angle between two adjacent reference straight lines gradually increases as they move toward the outer section. This increases the degree of design freedom for connecting the central section to the connecting section, while reducing the total number of reference straight lines in the central section compared to the equal interval, thereby lowering design costs.

[0028] Additionally, the plurality of reference lines may be formed so that the central angle between two adjacent reference lines gradually decreases or becomes the same as the angle between the two adjacent reference lines increases toward the outer section. This allows for a further increase in the number of reference lines, thereby further enhancing the degree of design freedom for connecting the central section to the connecting section.

[0029] Additionally, the plurality of inscribed circles may be formed such that their inner diameters gradually increase toward the outer section. This allows for improved design freedom for connecting the central section and the connecting section, with the arcs moving away from the center of the wrap toward the outer section.

[0030] As another example, the outer and inner surfaces of the above-mentioned connection section may each be formed as a single circular arc. This allows for maximizing the stroke volume in the outer section and / or the connection section, thereby achieving a larger compressor capacity.

[0031] For example, the radius of curvature of the arcs forming the outer and inner surfaces of the above-mentioned connecting section may be formed to be smaller than the radius of curvature of the arcs forming the outer and inner surfaces of the above-mentioned outer section. This allows for maximizing the administrative volume of the connecting section while increasing the degree of design freedom between the connecting section and the central section.

[0032] In addition, the outer side and inner side of the above-mentioned connecting section can be connected to the outer side and inner side of the central section within a range of approximately 300 to 360° along the rotation angle of the rotation axis based on the suction end of the first lap and the suction end of the second lap, respectively. Through this, the degree of design freedom for the connecting section can be increased, and noise increase and / or performance deterioration that may occur when the length of the outer section is increased can be prevented in advance.

[0033] As another example, the outer and inner surfaces of the above-mentioned connecting section may each be formed by connecting multiple circular arcs. This increases the degree of design freedom of the connecting section for connection with the outer section and / or the central section.

[0034] For example, the outer and inner sides of the connecting section can be formed to be connected to the outer and inner sides of the outer section within a range of approximately 180 to 300° based on the rotation angle of the rotation axis from the suction end of the first lap and the suction end of the second lap. Through this, the degree of design freedom for the connecting section can be increased, and noise increase and / or performance deterioration that may occur when the length of the outer section is increased can be prevented in advance.

[0035] According to the present embodiment, the scroll compressor comprises a wrap of each scroll including an outer section, a connecting section, and a central section, wherein the central section may be formed by connecting multiple circular arcs in series. This allows for an increase in stroke volume while achieving noise reduction and / or performance enhancement, and increases the degree of design freedom for forming each section of the wrap with different shapes while connecting these sections to each other.

[0036] In the scroll compressor according to the present embodiment, the baseline of each wrap may be formed by sequentially arranging a plurality of reference circles at preset intervals, sequentially arranging a plurality of inscribed circles inscribed within the plurality of reference circles, sequentially arranging a plurality of circular arcs tangent to the plurality of inscribed circles, and connecting portions of each of the plurality of circular arcs to each other. This allows for increased design freedom in forming each section of the fixed wrap and / or the orbiting wrap with different curves while connecting these sections to each other.

[0037] In the scroll compressor according to the present embodiment, the outer and inner surfaces of the connection section can each be formed as a single circular arc. This allows for maximizing the stroke volume in the outer section and / or the connection section, thereby realizing a large capacity of the compressor.

[0038] According to the present embodiment, the outer and inner surfaces of the connection section of the scroll compressor can be formed by connecting multiple circular arcs to each other. This increases the degree of freedom in designing the connection section for connection with the outer section and / or the central section.

[0039] Fig. 1 is a cross-sectional view showing a scroll compressor according to the present embodiment.

[0040] Figure 2 is a perspective view showing the fixed scroll and the rotating scroll according to Figure 1 in an exploded form.

[0041] Fig. 3 is a plan view showing the fixed scroll and the rotating scroll assembled according to Fig. 2.

[0042] Fig. 4 is a plan view schematically showing a turning wrap according to the present embodiment.

[0043] Figure 5a is a schematic diagram comparing the multi-arc lab according to the present embodiment with a conventional arc lab.

[0044] Figure 5b is a graph comparing the radial force in a multi-arc lab according to the present embodiment with the radial force in a conventional arc lab.

[0045] Figures 6a to 6n are schematic diagrams illustrating an example of the drawing order of a baseline.

[0046] Figures 7a and 7b are schematic diagrams illustrating another embodiment of the drawing order of the baseline.

[0047] Figure 8a is a plan view showing another embodiment of a turning lap.

[0048] Figure 8b is a schematic diagram showing the baseline for the turning lap of Figure 8a.

[0049] Hereinafter, a scroll compressor according to the present invention will be described in detail based on an embodiment illustrated in the attached drawings.

[0050] Typically, scroll compressors can be classified as sealed or open, depending on whether the drive motor and compression unit are installed together within the internal space of the casing. This embodiment uses a sealed scroll compressor as a representative example. However, the same principles can be applied to open scroll compressors.

[0051] Scroll compressors can also be categorized as low-pressure or high-pressure depending on the pressure of the refrigerant filled within the internal space of the casing. In a low-pressure type, the internal space of the casing is filled with refrigerant at suction pressure, while in a high-pressure type, the internal space of the casing is filled with refrigerant at discharge pressure. This embodiment uses a high-pressure scroll compressor as a representative example. However, the same principles can be applied to low-pressure scroll compressors.

[0052] Additionally, scroll compressors can be categorized into upper compression types and lower compression types depending on the installation location of the compression unit. In the upper compression type, the compression unit is installed above the driving motor, and in the lower compression type, the compression unit is installed below the driving motor. This embodiment describes an upper compression type scroll compressor as a representative example. However, the same principles can be applied to a lower compression type scroll compressor.

[0053] In addition, scroll compressors can be classified into orbiting back pressure type and fixed back pressure type according to the back pressure method. In the orbiting back pressure type, a back pressure chamber is formed on the back surface of the orbiting scroll, and in the fixed back pressure type, a back pressure chamber is formed on the back surface of the fixed scroll. This embodiment describes a scroll compressor of the orbiting back pressure type as a representative example. However, the same can be applied to a scroll compressor of the fixed back pressure type. In the fixed back pressure type, the fixed scroll is provided so that it is constrained in the circumferential direction but movable in the axial direction, so the fixed scroll is sometimes described as a non-orbiting scroll. Hereinafter, even in the fixed back pressure type, it is described as a fixed scroll, but the fixed scroll is described as a first scroll and the orbiting scroll is described as a second scroll, respectively, and the fixed wrap can be described as a first wrap and the orbiting wrap can be described as a second wrap, respectively.

[0054] In addition, scroll compressors can be divided into vertical scroll compressors in which the rotation axis is arranged perpendicular to the ground and horizontal scroll compressors in which the rotation 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 use a vertical scroll compressor as an example. However, the same or similar application can be applied to a horizontal scroll compressor. Therefore, the axial direction is understood as the axial direction of the rotation axis, and the radial direction is understood as the radial direction of the rotation axis, and the axial direction of the rotation axis can be understood as the up-down direction, and the radial direction of the rotation axis can be understood as the left-right direction, respectively.

[0055] Scroll compressors can also be categorized into fixed scroll compressors and mobile scroll compressors. Fixed scroll compressors are typically used for building air conditioning, while mobile scroll compressors are used for vehicle air conditioning. This embodiment uses a fixed scroll compressor as a representative example. However, the same principles can be applied to mobile scroll compressors.

[0056] In addition, scroll compressors can be classified into single-rotating scroll compressors and reciprocating scroll compressors depending on whether the scrolls rotate. Single-rotating scroll compressors are configured so that one scroll is fixed or has limited rotational movement while the other scroll rotates, and reciprocating scroll compressors can be configured so that both scrolls rotate. This embodiment is described using a single-rotating scroll compressor as a representative example. However, the same principles can be applied to reciprocating scroll compressors.

[0057] In addition, since the scroll compressor has an intake port formed on the outer side of the scroll and an exhaust port formed on the center side of the scroll, the refrigerant is sucked into the outer side of the scroll, gradually compressed as it moves toward the center of the scroll, and then exhausted. Therefore, in the following description, the outer side (or outer end) of the scroll (or wrap) can be defined as the intake side (or intake end), and the center side (or central end) can be defined as the exhaust side (or exhaust end).

[0058] Fig. 1 is a cross-sectional view showing a scroll compressor according to the present embodiment, Fig. 2 is a perspective view showing the fixed scroll and the orbiting scroll according to Fig. 1 in an exploded state, and Fig. 3 is a plan view showing the fixed scroll and the orbiting scroll according to Fig. 2 in an assembled state.

[0059] Referring to FIG. 1, in a scroll compressor according to the present embodiment, a drive motor (120) is installed in the lower half of a casing (110), and a main frame (130) is installed above the drive motor (120). A compression unit is installed above the main frame (130). The compression unit includes a fixed scroll (140) and an orbiting scroll (150), but in some cases, the main frame (130) may also be included in the compression unit and described. Hereinafter, one side of the rotation shaft (125) may be defined as the upper side, and the other side of the rotation shaft (125) may be defined as the lower side, based on the axial direction of the rotation shaft (125).

[0060] The casing (110) according to the present embodiment may include a cylindrical shell (111), an upper cap (112), and a lower cap (113). Accordingly, the internal space (110a) of the casing (110) may be divided into an upper space provided on the inside of the upper cap (112), an intermediate space provided on the inside of the cylindrical shell (111), and a lower space provided on the inside of the lower cap (113) based on the flow order of the refrigerant. Hereinafter, the upper space may be defined as a discharge space (110b), the intermediate space as an oil separation space (110c), and the lower space as an oil storage space (110d), respectively.

[0061] The cylindrical shell (111) has a cylindrical shape with both upper and lower ends open, and a driving motor (120), a main frame (130), and a subframe (118) can be respectively pressed into and fixed to the inner surface of the cylindrical shell (111).

[0062] A refrigerant discharge pipe (116) is connected to the cylindrical shell (111) by penetrating between the drive motor (120) and the main frame (130), and a refrigerant suction pipe (115) is connected to the upper cap (112) by penetrating therethrough. The refrigerant suction pipe (115) passes through the discharge space (110b) of the casing (110) and is directly connected to the suction pressure chamber (not shown) of the compression unit, which will be described later, and the refrigerant discharge pipe (116) is connected to the internal space (110a) of the casing (110). Accordingly, the refrigerant is directly supplied to the suction chamber (or suction pressure chamber) through the refrigerant suction pipe (115), and the high-pressure refrigerant discharged to the internal space (110a) of the casing (110) passes through the oil separation space (110c) and can be discharged through the refrigerant discharge pipe (116).

[0063] Referring to FIG. 1, the driving motor (120) according to the present embodiment is installed in the lower half of the oil separation space (110c) forming the high-pressure section in the internal space (110a) of the casing (110), and may include 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) may be rotatably provided inside the stator (121).

[0064] The rotation shaft (125) can be press-fitted and coupled to the rotor (122). The upper end of the rotation shaft (125) can be rotatably inserted into a main frame (130) to be described later and supported radially, and the lower end of the rotation shaft (125) can be rotatably inserted into a subframe (118) and supported radially and axially.

[0065] An eccentric portion (1251) is provided at the upper end of the rotating shaft (125), into which a rotating shaft insertion portion (153) of an orbiting scroll (150), which will be described later, can be rotatably inserted and coupled. The eccentric portion (1251) may be inserted and coupled into the rotating shaft insertion portion (153) of the orbiting scroll (150), or the rotating shaft insertion portion (153) of the orbiting scroll (150) may be inserted and coupled into the eccentric portion (1251). This embodiment illustrates an example in which the rotating shaft insertion portion (153) of the orbiting scroll (150) is inserted and coupled into the eccentric portion (1251) of the rotating shaft (125).

[0066] An oil supply hole (1255) may be formed inside the rotating shaft (125) by penetrating between the two ends of the rotating shaft (125). The oil supply hole (1255) may be formed by penetrating from the lower end of the rotating shaft (125) to the bottom surface of the eccentric portion (1251). Accordingly, oil stored in the oil storage space (110d) may be supplied to the inside of the eccentric portion (1251) through the oil supply hole (1255).

[0067] An oil pickup (126) including an oil pump may be installed at the lower end of the rotating shaft (125), i.e., at the lower end of the oil supply hole (1255). The inlet of the oil pickup (126) may be installed so as to be submerged in the oil stored in the oil storage space (110d). Accordingly, the oil stored in the oil storage space (110d) may be pumped by the oil pickup (126) and sucked up through the oil supply hole (1255).

[0068] Referring to Fig. 1, the main frame (130) according to the present embodiment is installed on the upper side of the driving motor (120) and can be fixed by hot pressing or welding to the inner wall surface of the cylindrical shell (111). The main frame (130) can include a main flange portion (131), a shaft support protrusion portion (132), and a back pressure space portion (133).

[0069] The upper surface of the main flange portion (131) can be formed with a scroll support surface (134). Accordingly, the lower surface (or back surface) of the pivot plate portion (151) described later can be slidably placed on the scroll support surface (134) and supported in the axial direction.

[0070] 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) may be formed on the inside of the shaft support protrusion (132). Accordingly, the main flange portion (131) may be formed in a ring shape.

[0071] The back pressure space (133) can be formed in an annular shape by being sunken to a preset depth from the edge of the scroll support surface (134). The back pressure space (133) is connected to the intermediate pressure chamber of the compression chamber (V) to form a back pressure that is an intermediate pressure between the suction pressure and the discharge pressure. Accordingly, the orbiting scroll (150) is pushed upward toward the fixed scroll (140) by the back pressure, and the orbiting scroll (150), which will be described later, is axially supported by being in close contact with the fixed scroll (140).

[0072] Referring to FIGS. 1 to 3, the fixed scroll (140) according to the present embodiment may include a fixed plate portion (141), a fixed side wall portion (142), and a fixed wrap (143).

[0073] The fixed plate portion (141) may be formed in a circular shape. The outer surface of the fixed plate portion (141) may be in close contact with the inner surface of the upper cap (112) forming the discharge space (110b) or may be spaced apart from the inner surface of the upper cap (112). The fixed plate portion (141) may be formed with the same thickness. Accordingly, the root end of the fixed wrap (143) described later may be formed with the same height throughout the entire fixed wrap (143).

[0074] Although not illustrated in the drawing, the fixed plate portion (141) may be formed to have different thicknesses at the outer portion and the center portion. For example, the center portion of the fixed plate portion (141) may be formed to be thicker than the outer portion. In this case, the wrap height of the fixed wrap (143) toward the center may be lowered, thereby securing wrap rigidity on the discharge side.

[0075] A suction port (1411) is formed on the outer surface of the fixed plate (141) in the axial direction and is connected to a suction pressure chamber (not shown), and a refrigerant suction pipe (115) that penetrates the upper cap (112) of the casing (110) can be inserted and connected to the suction port (1411). Accordingly, the refrigerant suction pipe (115) can pass through the discharge space (110b) of the casing (110) and be directly connected to the suction port (1411) of the fixed scroll (140).

[0076] A discharge port (1412) and a bypass hole (not shown) are formed in the center of the fixed plate portion (141), and a discharge valve (1431) for opening and closing the discharge port (1412) and a bypass valve (not shown) for opening and closing the bypass hole may be installed on the back surface of the fixed plate portion (141). Accordingly, the refrigerant compressed in the first compression chamber (V1) and the second compression chamber (V2) is discharged from the upper side of the fixed scroll (140) to the discharge space (110b) formed in the upper cap (112). Hereinafter, the compression chamber formed between the outer surface of the rotating wrap (152) to be described later and the inner surface of the fixed wrap (143) facing it is defined as the first compression chamber (V1), and the compression chamber formed between the inner surface of the rotating wrap (152) and the outer surface of the fixed wrap (143) facing it is defined as the second compression chamber (V2).

[0077] The fixed side-wall portion (142) can extend annularly from the outer portion of the fixed plate portion (141) toward the main frame (130). Accordingly, the fixed side-wall portion (142) can be bolted so that its lower surface is in close contact with the upper surface of the main frame (130), i.e., the upper surface of the main flange portion (131). Through this, the orbiting scroll (150) can be supported in both axial directions by the main frame (130) and the fixed scroll (150).

[0078] The fixed wrap (143) can extend from the lower surface of the fixed plate portion (141) toward the orbiting scroll (150). The fixed wrap (143) can be formed as a plurality of circular arc curves. For example, the fixed wrap (143) can be divided into a plurality of sections (1431), (1432), and (1433) along the forming direction of the wrap, and each section (1431), (1432), and (1433) can be formed as an arc curve having a preset radius of curvature. Accordingly, the stroke volume of the compression chamber (V) can be secured as large as possible, thereby increasing the compression capacity while maintaining the external size of the compressor.

[0079] In other words, the fixed wrap (143) is divided into an outer section (1431), a connecting section (1432), and a central section (1433), and the connecting section (1432) and / or the central section (1433) may be formed in a multi-arc wrap shape in which multiple arcs are connected. Accordingly, while the fixed wrap (143) is divided into multiple sections (1431), (1432), (1433), the degree of design freedom for connecting these multiple sections (1431), (1432), (1433) to each other can be increased. The specific wrap profile of the fixed wrap (143) will be described later.

[0080] The fixed wrap (143) may be formed with the same wrap height along the wrap formation direction, or may be formed with different heights. In this embodiment, an example in which the wrap heights of the fixed wrap (143) are the same is shown. However, even in cases in which the wrap heights of the fixed wrap (143) are different, for example, when the discharge-side wrap height is formed higher than the suction-side wrap height, the wrap profile of the fixed wrap (143) described above may be formed identically.

[0081] Referring to FIGS. 1 to 3, the rotary scroll (150) according to the present embodiment may include a rotary plate portion (151), a rotary wrap (152), and a rotary shaft insert portion (153).

[0082] The pivot plate (151) is formed in a circular shape and can be axially supported by the main frame (130) to perform pivotal movement between the main frame (130) and the fixed scroll (140).

[0083] The orbiting wrap (152) can extend from the upper surface (compression surface) of the orbiting plate (151) toward the fixed scroll (140). Accordingly, the orbiting wrap (152) can be interlocked with the fixed wrap (143) to form two pairs of compression chambers (V1) (V2).

[0084] The orbiting lap (152) can be formed with a plurality of circular arc curves to correspond to the fixed lap. In other words, the orbiting lap (152) is divided into an outer section (1521), a connecting section (1522), and a central section (1523), and the connecting section (1522) and / or the central section (1523) can be formed in a multi-circular lap shape in which a plurality of circular arcs are connected. Accordingly, while the orbiting lap (152) is divided into a plurality of sections (1521), (1522), (1523), the degree of design freedom for connecting these sections (1521), (1522), (1523) can be increased. The specific wrap profile of the orbiting lap (152) will be described later together with the wrap profile of the fixed lap (143).

[0085] The orbital wrap (152) may be formed with the same wrap height along the wrap formation direction, or may be formed with different heights. In the present embodiment, an example is shown in which the wrap height of the orbital wrap (152) is the same along the wrap formation direction. However, even in cases where the wrap height of the orbital wrap (152) is different, for example, when the discharge-side wrap height is formed higher than the suction-side wrap height, the wrap profile of the orbital wrap (152) described above may be formed identically.

[0086] The rotary shaft insertion portion (153) can extend from the geometric center of the orbiting scroll (150) toward the eccentric portion (1251) of the rotary shaft (125). The rotary shaft insertion portion (153) can be rotatably inserted into the eccentric portion (1251) of the rotary shaft (125). Accordingly, the orbiting scroll (150) is rotated by the eccentric portion (1251) of the rotary shaft (125) and the rotary shaft insertion portion (153).

[0087] The unexplained symbol 160 in the drawing is Oldham Ring.

[0088] The scroll compressor according to the above embodiment operates as follows.

[0089] That is, when power is applied to the driving motor (120) and rotational force is generated, the orbiting scroll (150) eccentrically coupled to the rotation shaft (125) rotates relative to the fixed scroll (140) by the old ring (160). At this time, a first compression chamber (V1) and a second compression chamber (V2) that move continuously are formed between the fixed scroll (140) and the orbiting scroll (150).

[0090] Then, the volume of the first compression chamber (V1) and the second compression chamber (V2) gradually narrows as the orbiting scroll (150) moves from the suction port (or suction pressure chamber) (1411) toward the discharge port (or discharge pressure chamber) (1412) while performing the orbiting motion.

[0091] Then, the refrigerant is introduced into the first compression chamber (V1) and the second compression chamber (V2) through the refrigerant suction pipe (115) and the suction port (1411) of the fixed scroll (140), and the refrigerant is compressed while moving toward the final compression chamber by the orbiting scroll (150). The refrigerant is discharged from the final compression chamber to the discharge space (110b) of the casing (110) through the discharge port (1412) of the fixed scroll (140), and the refrigerant moves to the oil separation space (110c) or / and the oil storage space (110d) of the casing (110) through the discharge passage (not shown) provided in the fixed scroll (140) and the main frame (130).

[0092] Then, the refrigerant circulates through the oil separation space (110c) of the casing (110), and the oil is separated from the refrigerant. The refrigerant from which the oil has been separated is discharged to the outside of the casing (110) through the refrigerant discharge pipe (116), and after circulating through the refrigeration cycle, it is sucked into the compression chamber (V1) (V2) through the refrigerant suction pipe (115), repeating a series of processes.

[0093] At this time, the stroke volume of the compression chamber (V) is determined by the shape of the fixed wrap (143) and the orbital wrap (152). For example, the fixed wrap (143) and the orbital wrap (152) may be formed in a logarithmic spiral over the entire section (1431, 1432, 1433)(1521, 1522, 1523) of each wrap, or the central section (1433)(1523) and / or the connection section (1432, 1522) on the discharge side may be formed in a logarithmic spiral, and the outer section (1431)(1521) and / or the connection section (1432)(1522) on the suction side may be formed in an arc curve.

[0094] In the former case, since the entire wrap is formed in a logarithmic spiral, the fluctuation range of gas force is low, which may be advantageous in terms of compressor noise and / or stability. However, in this case, the area where a compression chamber (V) cannot be formed in the outer section (1431) of the fixed plate section (141) and the outer section (1521) of the rotating plate section (151) increases, which is disadvantageous for increasing the compressor's capacity.

[0095] On the other hand, in the latter case, the stroke volume in the outer section (1431)(1521) can be expanded while the gas force fluctuation range in the central section (1433)(1523) is reduced by combining the logarithmic spiral and the circular curve. This allows for a larger compressor capacity while improving noise and / or stability. However, although a polynomial curve wrap can be applied to connect the logarithmic spiral and the circular curve, this has a low degree of design freedom, making it very difficult to design to secure the maximum stroke volume in reality.

[0096] Accordingly, in the present embodiment, the wrap shapes of the fixed wrap (143) and the orbital wrap (152) are formed as a plurality of interconnected circular arc curves to secure the maximum stroke volume while minimizing the increase in the fluctuation range of the gas force. As described above, the wrap shapes of the fixed wrap (143) and the orbital wrap (152) can be formed to correspond to each other. Therefore, the following description focuses on the orbital wrap (152), and the fixed wrap (143) is replaced with a description of the orbital wrap (152).

[0097] Fig. 4 is a plan view showing a turning wrap according to the present embodiment.

[0098] Referring back to FIGS. 1 and 2, the orbiting wrap (152) according to the present embodiment protrudes from one side of the orbiting plate portion (151) toward the fixed scroll (140) by a preset height, and the wrap height of the orbiting wrap (152) can be formed to be the same along the wrap formation direction. However, as described above, the thickness of the center of the orbiting plate portion (151) can be made thicker than the thickness of the outer portion, so that the wrap height in the center section (1523) of the orbiting wrap (152) can be formed to be lower than the wrap height in the outer section (1521). Through this, the wrap strength of the orbiting wrap (152) in the center section (1523) corresponding to the discharge section can be improved. However, for the convenience of explanation, the following description will focus on an example in which the wrap height of the orbiting wrap (152) is the same.

[0099] Referring to FIG. 4, the orbital wrap (152) according to the present embodiment is formed as a kind of multi-arc wrap shape by continuously connecting a plurality of circular arcs, and may be formed by dividing into at least two or more sections that are connected to each other along the wrap formation direction. For example, the orbital wrap (152) according to the present embodiment may be formed of an outer section (1521) including a suction end, a connection section (1522) connected to the discharge end (discharge end) of the outer section, and a central section (1523) connected to the discharge end (discharge end) of the connection section (1522) and including the discharge end (152b) of the orbital wrap (152). In other words, the orbital wrap (152) according to the present embodiment can be formed by connecting the suction side end (1521a) of the connection section (1522) to the discharge side end (1521b) of the outer section (1521), and connecting the suction side end (1523a) of the central section (1523) to the discharge side end (1521b) of the connection section (1521). Accordingly, the suction side end (152a) of the orbital wrap (152) forms the suction side end (1521a) of the outer section (1521), and the discharge side end (152b) of the orbital wrap (152) forms the discharge side end (1523b) of the central section (1523).

[0100] In this case, the outer section (1521) may be formed as a single-arc lap having a single arc surface, and the central section (1523) may be formed as a multi-arc lap having multiple arc surfaces connected. The connecting section (1522) may be formed as a single-arc lap like the outer section (1521), or as a multi-arc lap like the central section (1523). In the former case, when the connecting section (1522) is formed as a single-arc lap, the stroke volume can be expanded as widely as possible as the section forming the arc lap becomes longer, and in the latter case, when the connecting section (1522) is formed as a multi-arc lap, the section similar to the involute curve becomes longer, so that the fluctuation range of the gas force is lowered, thereby reducing noise and improving compressor performance. This embodiment illustrates the former case, that is, an example in which the connecting section (1522) is formed as a single-arc lap.

[0101] Specifically, the outer section (1521) of the orbital wrap (152) according to the present embodiment is a section forming a suction section or a suction-compression section, and as described above, the outer surface (152c) and the inner surface (152d) of the orbital wrap (152) can be formed in an arc shape each having a radius of curvature of one. Accordingly, the outer section (1521) of the orbital wrap (152) can be understood as a single arc-shaped wrap section.

[0102] In other words, in the outer section (1521), the entire outer surface (152c) and inner surface (152d) of the turning wrap (152) can be formed into an arc shape having the same curvature as the outer diameter of the turning plate (151). Accordingly, in the outer section (1521), the turning wrap (152) can be positioned as far away from the wrap center (Or) as possible, thereby securing the largest possible administrative volume.

[0103] In this case, the outer section (1521) of the turning lap (152) can continue for approximately 180° or more from the suction end (or suction end of the outer section) (152a) of the turning lap (152) toward the discharge end (or suction end of the connecting section) (152b) of the turning lap (152) based on the rotation angle (crank angle) of the rotation shaft (125). If the outer section (1521) is less than 180°, there may be a limit to expanding the stroke volume (or suction volume) without sufficiently utilizing the outer thrust surface of the turning plate (151).

[0104] In addition, the outer section (1521) of the turning lap (152) can be formed at an angle of less than approximately 360°, for example, less than approximately 300°, from the suction end (or suction end of the outer section) (152a) of the turning lap (152) toward the discharge end (or suction end of the connecting section) (152b) of the turning lap (152). In other words, the outer section (1521) forming the single circular lap section can be formed within a range of approximately 180 to 300° along the rotation angle (lap formation direction) from the suction end (152a) of the turning lap (152) toward the discharge end (152b) of the turning lap (152). Accordingly, the length of the connecting section (1522) can be prevented from being excessively shortened compared to the outer section (1521), thereby increasing the degree of design freedom for the connecting section (1522), and noise increase and / or performance deterioration that may occur when the length of the outer section (1521) is increased can be prevented in advance.

[0105] The connecting section (1522) according to the present embodiment is a section forming a suction-compression section or a compression section, and as described above, the outer surface (152c) and the inner surface (152d) of the turning wrap (152) can be formed in an arc shape each having a radius of curvature of one. Accordingly, the connecting section (1522) of the turning wrap (152) can be understood as a single arc-shaped wrapping section.

[0106] In other words, in the connecting section (1522), the entire outer surface (152c) and inner surface (152d) of the turning lap (152) are formed in a single arc lap shape having a single radius of curvature, but the radius of curvature in this connecting section (1522) can be formed smaller than the radius of curvature in the outer section (1521) described above. Accordingly, the connecting section (1522) is formed in a shape that winds toward the lap center (Or) from the suction end (or the discharge end of the outer section) (1522a) of the connecting section (1522) toward the discharge end (or the suction end of the central section) (1522b) with respect to the outer section (1521), thereby increasing the degree of design freedom for connection with the central section (1523) described later.

[0107] In addition, the connecting section (1522) of the turning lap (152) can be formed so that the lap thickness in at least a portion thereof is greater than that in the outer section (1521). In other words, since the radius of curvature in the connecting section (1522) is formed to be smaller than that in the outer section (1521), the lap thickness in the connecting section (1522) can be formed to be thicker than that in the outer section (1521). Accordingly, while both ends (1522a)(1522b) of the connecting section (1522) are naturally connected to the outer section (1521) and the central section (1523), the lap thickness in the central section (1523) connected to the connecting section (1522) can be formed to be thick.

[0108] In this case, the connecting section (1522) of the orbital wrap (152) may be formed so that one end thereof is connected to the outer section (1521) of the orbital wrap (152) at a point less than approximately 360° along the rotation angle of the rotation axis (125) based on the suction end (152a) of the orbital wrap (152). If the connecting section (1522) extends from the suction end (152a) of the orbital wrap (152) toward the discharge end (152b) of the orbital wrap to more than 360°, the outer section (1521), which is a single circular wrap section, may become excessively long. This may cause an increase in noise and / or a decrease in performance that may occur due to the characteristics of the circular wrap. On the other hand, if the connecting section (1522) is formed too close to the suction end (152a) of the turning lap (152), the section length of the outer section (1521) may be shortened, thereby reducing the effect of increasing the stroke volume. Accordingly, it may be preferable that the connecting section (1522) of the turning lap (1522) be formed so that its suction end (1522a) is connected to the central section (1523) of the turning lap (152) within a range of approximately 300 to 360° along the rotation angle of the rotation axis (125) with respect to the suction end (152a) of the turning lap (152).

[0109] The central section (1523) of the orbital wrap (152) according to the present embodiment is a section forming a discharge section or a compression-discharge section, and as described above, the outer surface (152c) and the inner surface (152d) of the orbital wrap (152) can be formed by continuously connecting a plurality of arcs each having a different radius of curvature. In other words, the central section (1523) of the orbital wrap (152) is formed in a shape similar to an involute curve determined by a predetermined formula, but in reality, a plurality of arcs can be combined to form a continuous curve. Accordingly, the central section (1523) of the orbital wrap (152) can be understood as a multi-arc wrap section.

[0110] Specifically, in the central section (1523), the outer surface (152c) and the inner surface (152d) of the orbital wrap (152) may be formed as a plurality of circular arc surfaces that are continuously connected to each other, and the two adjacent circular arc surfaces may be formed to have different radii of curvature (D3) (D3'). For example, the outer surface (152c) of the orbital wrap (152) forming the central section (1523) may be formed such that the radius of curvature (D3') of the circular arc surface (152e') adjacent to the connecting section (1522) among the two adjacent circular arc surfaces (152e) (152e') is larger than the radius of curvature (D3) of the circular arc surface (152e) that is farther from the connecting section (1522). In other words, the central section (1523) of the orbital wrap (152) can be formed so that the radius of curvature of each arc increases as it goes toward the connection section (1522). Accordingly, the central section (1523) of the orbital wrap (152) can be connected to the discharge side end (1522b) of the connection section (1522) while moving away from the wrap center (Or) as it goes from the discharge side end (1523b) to the suction side end (1523a). Through this, the central section (1523) can be formed so as to appropriately reduce the range of gas force fluctuations like an involute curve, while increasing the degree of design freedom for connecting the central section (1523) and the connection section (1522).

[0111] In addition, the central section (1523) of the orbiting wrap (152) may be formed so that the arc lengths of the adjacent arcs are different. For example, the central section (1523) may be formed so that the arc length (L3') of the arc surface (152e') adjacent to the connecting section (1522) among the two adjacent arcs is greater than the arc length (L3) of the arc surface (152e) farther from the connecting section (1522). In other words, the central section (1523) of the orbiting wrap (152) may be formed so that the arc lengths of each arc gradually increase as it goes toward the connecting section (1522). Accordingly, the number of arcs may be minimized under the condition that the total length of the central section (1523) is the same, thereby simplifying the manufacturing process for the central section (1523).

[0112] Meanwhile, as described above, the fixed lap (143) can be formed to correspond to the turning lap (152). In other words, the fixed lap (143) is formed of an outer section (1431) - a connecting section (1432) - a central section (1433) like the turning lap (152), but the outer section (1431) of the fixed lap (143) corresponds to the outer section (1521) of the turning lap (152), the connecting section (1432) of the fixed lap (143) corresponds to the connecting section (1522) of the turning lap (152), and the central section (1433) of the fixed lap (143) can be formed to correspond to the central section (1523) of the turning lap (152). Accordingly, the outer section (1431), connecting section (1432), and central section (1433) of the fixed lap (143) are replaced with the description of the outer section (1521), connecting section (1522), and central section (1523) of the turning lap (152).

[0113] As described above, when the fixed wrap (143) and the turning wrap (152) are formed as a multi-arc wrap, even if the fixed wrap (143) and the turning wrap (152) are divided into multiple sections having different arc curves, the degree of design freedom for connecting each section can be dramatically increased.

[0114] In addition, when the fixed wrap (143) and the rotating wrap (152) are formed as a multi-arc wrap, the radial force (Frg) is reduced compared to a conventional arc wrap (conventional arc wrap), so that the compressor noise can be reduced. Fig. 5a is a schematic diagram comparing the multi-arc wrap according to the present embodiment with a conventional arc wrap, and Fig. 5b is a graph comparing the radial force in the multi-arc wrap according to the present embodiment with the radial force in the conventional arc wrap.

[0115] Referring to FIG. 5a, the fixed wrap (143) and the orbital wrap (152) according to the present embodiment are formed as a multi-arc wrap by connecting multiple arcs as described above, and thus, the shape of the curve can be formed to be closer to an involute curve compared to the conventional arc wrap (200). Accordingly, compared to the typical conventional arc wrap (200), the gap between the contact points between the fixed wrap (143) and the orbital wrap (152) can be constantly changed, and the fluctuation range of the gas force can be formed to be small. This can be confirmed through FIG. 5b.

[0116] Referring to Fig. 5b, in the case of a logarithmic spiral (involute curve), the radial force (Frg) is formed constantly along the rotation angle of the rotation axis, but in the case of a conventional circular lap and a multi-circular lap (this embodiment), it can be seen that it changes along the rotation angle of the rotation axis.

[0117] However, while the conventional circular wrap is formed with a considerably large variation in its radial force (Frg), the multi-circular wrap according to the present embodiment can be seen to have a considerably improved variation in its radial force (Frg). Through this, when the fixed wrap (143) and the orbiting wrap (152) are formed as a multi-circular wrap as in the present embodiment, the degree of design freedom for connecting each section (1431, 1432, 1433) (1521, 1522, 1523) of the wraps (143) (152) described above can be increased, while the variation in gas force can be reduced to lower compressor noise and improve compressor performance.

[0118] Meanwhile, in the scroll compressor according to the present embodiment, the fixed wrap and the orbiting wrap can be designed and / or manufactured as follows. For example, the fixed wrap (143) and the orbiting wrap (152) are designed by drawing an arbitrary baseline (171), and the outer surface (143c) and the inner surface (143d) of the fixed wrap (143), and the outer surface (152c) and the inner surface (152d) of the orbiting wrap (152) are respectively positioned at positions spaced apart from the baseline (171) by half the orbiting radius in the outer and inner directions. In this case, after drawing the center section (1523) of the fixed lap (143) and the turning lap (152), the connection section (1522) and the outer section (1521) may be sequentially connected to the suction side end (1523a) of the center section (1523), or conversely, the outer section (1521) and the connection section (1522) may be drawn first, and then the suction side end (1523a) of the center section (1523) may be connected to the discharge side end (1522b) of the connection section (1522). This embodiment illustrates an example in which the center section (1523) is drawn first.

[0119] In addition, the baseline (171) can be completed as a single final baseline (hereinafter, baseline) (171) by connecting the inner ends of two unit baselines (hereinafter, the first baseline and the second baseline) (171a) (171b). In this case, after drawing the first baseline (171a), the discharge end of the first baseline (171a) is rotated by 180° to draw the second baseline (171b) in the same shape as the first baseline (171a), thereby drawing the final baseline (171). Therefore, the following description will focus on the first baseline (171a).

[0120] Figures 6a to 6n are schematic diagrams illustrating an example of the drawing order of a baseline.

[0121] First, as in Fig. 6a, a single reference curve (173) in a spiral shape can be drawn from an arbitrary base circle (172). In this case, the reference curve (173) can be drawn using an arbitrary formula, or can be appropriately drawn according to the capacity or size of the compressor. Accordingly, a plurality of reference circles (175a, 175b...) to be described later are arranged evenly along the reference curve (173), so that the reference line (171) can be easily derived, and the curve forming the base line (171) is formed to be close to an involute curve, so that the fluctuation range of the gas force is formed small, thereby reducing noise and / or improving performance.

[0122] For example, the reference curve (173) according to the present embodiment can be formed in a shape similar to an involute curve on an arbitrary base circle (172). However, while the conventional involute curve has the same involute curve as the base line (171) of the lap, the reference curve (173) of the present embodiment does not form the base line (171) of the lap itself, although its shape is similar to the involute curve. In other words, the reference curve (173) of the present embodiment is temporarily constructed to derive the base line (171), and thus is different from the conventional involute curve.

[0123] Next, as in FIG. 6b, a plurality of reference straight lines (174a, 174b.....) can be drawn at preset intervals along the progress direction of the reference curve (173) so as to intersect the reference curve (173) at the lap center (Or). In other words, the plurality of reference straight lines (174a, 174b.....) extend radially from the lap center (Or) toward the reference curve (173) as described above, but these plurality of reference straight lines (174a, 174b......) can be drawn so as to be spaced apart from each other by preset central angles (α1, α2....) between the adjacent reference straight lines (174a, 174b....). In this case, the intervals between the plurality of reference straight lines (174a, 174b.....), that is, the respective central angles (α1, α2.....), can be drawn differently along the progress direction of the reference curve (173).

[0124] For example, when the reference straight line closest to the discharge end (152b) of the rotating lap (or fixed lap) (152) is called the first reference straight line (174a), the next reference straight line is called the second reference straight line (174b), and the next reference straight line is called the third reference straight line (174c), and the central angle between the first reference straight line (174a) and the second reference straight line (174b) is called the first central angle (α1), and the central angle between the second reference straight line (174b) and the third reference straight line (174c) is called the second central angle (α2), the second central angle (α2) can be formed to be larger than the first central angle (α1). In other words, the central angles (α1, α2......) between neighboring reference straight lines (174a, 174b.....) can be drawn to gradually increase as they approach the suction end (or connecting section) of the reference curve (173). Accordingly, the central section (1523) is formed as a multi-arc lap, thereby increasing the degree of design freedom for connecting the central section (1523) to the connecting section (1522), while reducing the total number of reference straight lines (174a, 174b...) in the central section (1523) compared to equal intervals, thereby lowering the design cost.

[0125] Although not illustrated in the drawing, the above-mentioned central angles (α1, α2...) may also be constructed at the same angle along the reference curve (173). In this case, the number of reference lines (174a, 174b...) increases compared to the previously described embodiment, thereby further increasing the degree of design freedom for connecting the central section (1523) to the connecting section (1522).

[0126] Although not shown in the drawing, the above-mentioned central angles (α1, α2....) may be drawn to decrease as they approach the suction end (or connecting section) (unsigned) of the reference curve (173). In this case, the number of reference straight lines (174a, 174b....) increases further than in the previous embodiments, so that the degree of design freedom for connecting the central section (1523) to the connecting section (1522) can be further increased than in the previous embodiments.

[0127] Next, as in FIG. 6c, a plurality of reference circles (175a, 175b.....) centered on the respective intersection points (P1, P2.....) of the reference curve (173) and the respective reference straight lines (174a, 174b.....) can be drawn. For example, when the intersection point where the first reference straight line (174a) meets the reference curve (173) is called the first intersection point (P1), the intersection point where the second reference straight line (174b) meets the reference curve (173) is called the second intersection point (P2), and the circle drawn centered on the first intersection point (P1) is called the first reference circle (175a), and the circle drawn centered on the second intersection point (P2) is called the second reference circle (175b), each of the reference circles (175a, 175b.....) can be sequentially listed along the reference curve (173). Accordingly, not only can the degree of design freedom be increased by easily drawing multiple reference circles (175a, 175b...), but also the fluctuation range of gas force can be reduced as the curve forming the reference line (171) is formed similarly to an involute curve.

[0128] In this case, multiple reference circles (175a, 175b....) can be constructed to have the same inner diameter (D11, D12....). In other words, multiple reference circles (175a, 175b....) are constructed with the intersection points (P1, P2....) of the reference curve (173) and the respective reference straight lines (174a, 174b....) as the center, as described above, but multiple reference circles (175a, 175b....) can be constructed as circles each having the same inner diameter (D11, D12....). Accordingly, when the baseline (171) to be described later is formed by a combination of a plurality of arcs (177a, 177b...) inscribed in a plurality of reference circles (175a, 175b...), the wrap angle of the baseline (171) to be described later is formed gently, thereby increasing the degree of design freedom to minimize the variation of gas force in the central section (1523).

[0129] Although not shown in the drawing, the inner diameter (D11, D12....) of the above-described reference circle (175a, 175b....) may be drawn to increase toward the outer section (1521). In this case, compared to the above-described embodiment, the angle of the base line (171) to be described later becomes more gentle, and the section length of the central section (1523) can be minimized, thereby reducing the design cost.

[0130] Although not shown in the drawing, the inner diameters (D11, D12.....) of the above-described reference circles (175a, 175b......) may be drawn to decrease as they go toward the outer section (1521). In this case, compared to the previously described embodiments, the angle of the baseline (171) to be described later is formed more rapidly, and the length of the central section (1523) is maximized, so that the compression period can be extended. However, even in this case, the length of the second reference straight line (174b) increases more than the length of the first reference straight line (174a) defined by the interval between the lap center (Or) and each intersection point (P1, P2.....), so that the first arc (177a) to be described later may be drawn in a direction away from the lap center (Or) unless the inner diameter (D11) of the first reference circle (175a) is significantly smaller than the inner diameter (D12) of the second reference circle (175b).

[0131] Next, as shown in FIGS. 6d to 6g, an inscribed circle (176a, 176b.....) inscribed by two adjacent reference circles (175a, 175b.....) can be constructed, and the next inscribed circle (176b, 176c......) inscribed by the inscribed circle (176a, 176b.....) and the next reference circle (175c, 175d.......) can be constructed. In other words, the process of constructing an inscribed circle (176a) inscribed by two reference circles (175a, 175b......) and the next inscribed circle (176b.....) inscribed by the next reference circle (175c...) adjacent to the inscribed circle (176a) can be repeated. In this case, multiple inscribed circles (176a, 176b......) can be formed so that the inner diameters (D21, D22.....) of the inscribed circles (176a, 176b......) gradually increase as the inscribed circles (176a, 176b......) move away from the wrap center (Or).

[0132] For example, the reference circle closest to the center of the lap (or the discharge end of the orbiting lap) (Or) is called the first reference circle (175a), the reference circle farthest from the center of the lap (Or) or closest to the suction end (152a) of the orbiting lap (152) is called the Nth reference circle (unsigned), and when a plurality of reference circles (175a, 175b...) are sequentially arranged between the first reference circle (175a) and the Nth reference circle (unsigned), the inscribed circle inscribed by the first reference circle (175a) and the second reference circle (175b) becomes the first inscribed circle (176a), the inscribed circle inscribed by the first inscribed circle (176a) and the third reference circle (175c) becomes the second inscribed circle (176b), and the inscribed circle inscribed by the second inscribed circle (176b) and the fourth reference circle (175d) becomes the It becomes the third inscribed circle (176c). If this is repeated continuously, the inscribed circle that the N-2-th inscribed circle (unsigned) and the N-th reference circle (unsigned) inscribe becomes the N-1-th inscribed circle (unsigned). In this case, as shown in FIGS. 6e and 6f, the inner diameter (D22) of the second inscribed circle (176b) can be formed to be larger than the inner diameter (D21) of the first inscribed circle (176a), and the inner diameter (D23) of the third inscribed circle (176c) can be formed to be larger than the inner diameter (D22) of the second inscribed circle (176b).

[0133] In other words, even if the inner diameters (D11, D12....) of the reference circles (175a, 175b....) are the same as in Fig. 6g, as the reference straight line (174a, 174b....) gradually increases toward the connecting section (or outer section) (1522), the inner diameters (D21, D22....) of the inscribed circles (176a, 176b....) gradually increase from the first inscribed circle (176a) to the N-1th inscribed circle (unsigned). Accordingly, each of the arcs (177a, 177b...) described later can be connected to the connecting section (1522) in an arc shape by gradually moving away from the wrap center (Or) toward the connecting section (or outer section) (1522).

[0134] This is the same when the inner diameter (D11, D12......) of the reference circle (175a, 175b.......) gradually increases as it goes toward the outer section (1521), that is, as it goes away from the base circle (172), and also when the inner diameter (D11, D12......) of the reference circle (175a, 175b......) gradually decreases as it goes toward the outer section (1521) (if the difference in length of the neighboring reference straight lines is greater than the difference in inner diameter of the neighboring reference circles). In other words, unless the inner diameters (D11, D12.......) of the reference circles (175a, 175b........) are formed extremely small, the inner diameters (D11, D12.......) of the reference circles (175a, 175b........) gradually increase as they go toward the outer section (1521), and even if the inner diameters (D1, D12.....) of the reference circles (175a, 175b.......) gradually decrease as they go toward the outer section (1521) (if the difference in lengths of the neighboring reference straight lines is greater than the difference in inner diameters of the neighboring reference circles), the inner diameters (D21, D22.....) of the inscribed circles (176a, 176b.......) gradually increase as they go from the first inscribed circle (176a) to the N-1th inscribed circle (unsigned). Accordingly, the baseline (171) in the central section (1523) is formed to be gently wound, thereby increasing the degree of design freedom for connection between the central section (1523) and the connection section (1522), while securing the lap thickness and thus improving the lap strength.

[0135] Although not shown in the drawing, the inner diameters (D21, D22.....) of each inscribed circle (176a, 176b.....) may be formed identically. In this case, the compression length may be lengthened as the base circle (172) in the central section (1523) is rapidly wound, thereby improving the compression performance.

[0136] Meanwhile, as shown in FIGS. 6h to 6n, an arc (177a, 177b......) is derived between the reference circles (175a, 175b.....), the next arc (177b, 177c.....) is derived between the arc (177a, 177b......) and the next reference circle (175b, 175c.....), and a series of processes of connecting the next arc (177c, 177d......) to the previous arc (177b, 177c.....) are repeated to finally construct the first reference line (171a).

[0137] First, as shown in FIG. 6h, the first arc (177a) can be derived from the circumference of the first inscribed circle (176a). In other words, the first arc (177a) can be derived by excluding (deleting) the rest, leaving only the arc between the two contact points (A1) (B1) where the first reference circle (175a) and the second reference circle (175b) touch the circumference of the first inscribed circle (176a). In this case, the arc length (L21) of the first arc (177a) can be determined by the first central angle (α1) between the first reference straight line (174a) and the second reference straight line (174b) described above, the inner diameter (D11) of the first reference circle (175a), and the inner diameter (D12) of the second reference circle (175b).

[0138] Thereafter, as shown in Fig. 6i, the second arc (177b) can be derived from the circumference of the second inscribed circle (176b). In other words, the second arc (177b) can be derived by excluding the rest, leaving only the arcs between the two contact points (A2) (B2) where the first arc (177a) and the third reference circle (175c) are in contact with each other, from the circumference of the second inscribed circle (176b). In this case as well, the arc length (L22) of the second arc (177b) can be determined by the second central angle (α2) between the second reference straight line (174b) and the third reference straight line (174c), the inner diameter (D12) of the second reference circle (175b), and the inner diameter (D13) of the third reference circle (175c).

[0139] Thereafter, as shown in Fig. 6j, the third arc (177c) can be derived from the circumference of the third inscribed circle (176c). In other words, the third arc (177c) can be derived by excluding the rest, leaving only the arc between the two contact points (A3) (B3) where the second arc (177b) and the fourth reference circle (175d) are in contact with each other, from the circumference of the third inscribed circle (176c). In this case as well, the arc length (L23) of the third arc (177c) can be determined by the third central angle (α3) between the third reference straight line (174c) and the fourth reference straight line (174d), the inner diameter (D13) of the third reference circle (175c), and the inner diameter (D14) of the fourth reference circle (175d).

[0140] Afterwards, as shown in Fig. 6k, by deriving each arc (177a, 177b.....) from the circumference of each inscribed circle (176a, 176b......), each of these arcs (more precisely, a part of each arc) (177a, 177b.....) can be sequentially connected to finally complete the first base line (171). In other words, by sequentially deriving the next arc (177b, 177c.....) connecting the previous arc (177a, 177b.....) and the next reference circle (175c, 175d.....) adjacent to the inscribed circle (176a, 176b.....) from the circumference of the corresponding inscribed circle (176a, 176b.....), each of these arcs (177a, 177b.....) can be connected to each other. At this time, among each of the circular arcs (177a, 177b.....), the next circular arc (177b, 177c....) is connected to the middle of the previous circular arc (177a, 177b....), so that among the preceding circular arcs (177a, 177b.....), the part after the rear contact point (B1, B2....) or the part other than the part between the contact points (A1, A2...) (B1, B2...) on both sides can be excluded from the first basic circle (171a). In addition, even in this case, the arc length (L21, L22.....) of each circular arc (177a, 177b.....) can be determined by the central angles (α1, α2....) between the neighboring reference straight lines (174a, 174b....) and the inner diameters (D11, D12......) of the neighboring reference circles (175a, 175b....).

[0141] Afterwards, if the process of deriving the arcs (177a, 177b.....) described above is repeated continuously, the first base line (171a) for the central section (1523) can be finally derived while deriving the N-2-th arc (unsigned) from the circumference of the N-1-th inscribed circle (unsigned).

[0142] Here, the arc centers (Oc',......) of the rear-side arcs (177b, 177c,.......) may be formed differently from the arc centers (Oc,......) of the front-side arcs (177a, 177b......). For example, the arc center (Oc') of the second arc (177b) may be formed to be spaced apart from the arc center (Oc) of the first arc (177a). Accordingly, the second arc (177b) may be formed to be wound in a direction further away from the wrap center (Or) than the first arc (177a) as it goes toward the suction end of the first base line (171). In other words, as the final arc, the N-2nd arc (not shown), is further away from the center of the wrap (Or) than the N-3rd arc (not shown) in front of it, the center section (1523) can be connected to the connecting section (1522) in an arc shape.

[0143] In addition, the radius of curvature (D3'.....) of the rear-side arcs (177b, 177c......) may be formed differently from the radius of curvature (D3.....) of the front-side arcs (177a, 177b......). For example, the radius of curvature (D3') of the second arc (177b) may be formed to be larger than the radius of curvature (D3) of the first arc (177a). Accordingly, the second arc (177b) may be formed in a direction that moves away from the wrap center (Or) as it moves toward the suction end of the first base line (171) compared to the first arc (177a). In other words, as the final arc, the N-2nd arc (not shown), is further away from the center of the wrap (Or) than the N-3rd arc (not shown) in front of it, the center section (1523) can be connected to the connecting section (1522) in an arc shape.

[0144] In addition, the arc lengths (L22, L23.....) of the rear-side arcs (177b, 177c.....) may be formed differently from the arc lengths (L21, L22.....) of the front-side arcs (177a, 177b......). For example, the arc length (L22) of the second arc (177b) may be formed to be longer than the arc length (L21) of the first arc (177a). In other words, the arc length (unsigned) of the final N-2nd arc (unsigned) may be formed to be longer than the arc length (unsigned) of the N-3rd arc (unsigned) preceding it. Accordingly, the design freedom for connecting the central section (1523) to the connecting section (1522) is increased, while the total number of reference straight lines (174a, 174b...) in the central section (1523) is reduced, thereby lowering the design cost.

[0145] Although not shown in the drawing, the arc lengths (L21, L22.....) of the above-described arcs (177a, 177b.....) may be formed identically. In other words, the arc length (L21) of the first arc (177a) closest to the wrap center (Or) may be formed identically for all arc lengths (unsigned) up to the N-2nd arc (unsigned) furthest from the wrap center (Or). In this case, the intervals between the reference circles (175a, 175b.....) including the reference straight line (174a, 174b.....) can be arranged more consistently than in the previous embodiment, so that the baseline (171) can be derived more easily, and the number of arcs (177a, 177b.....) increases compared to the previously described embodiment, so that the degree of design freedom for connecting the center section (1523) to the connecting section (1522) can be further increased.

[0146] Although not shown in the drawing, the arc lengths (L21, L22.....) of the above-described arcs (177a, 177b.....) may be formed to decrease as they get farther away from the wrap center (Or). In other words, the arc length (L21) of the first arc (177a) farthest from the outer section (1521) may be the longest, and the arc length (unsigned) of the N-2th arc (unsigned) closest to the outer section (1521) may be the shortest. In this case, the number of arcs (177a, 177b......) may be further increased than in the previous embodiments, thereby further increasing the degree of design freedom for connecting the center section (1523) to the connecting section (1522) than in the previous embodiments.

[0147] Thereafter, as shown in FIG. 6l, when the first baseline (171a) for the central section (1523) is drawn, the first baseline (171a) for the connection section (1522) and the outer section (1521) can be drawn sequentially at the suction side end of the first baseline (171a) among the first baseline lines (171a) of the central section (1523). In this case, the first baseline (171a) of the connection section (1522) and the first baseline (171a) of the outer section (1521) can be drawn by connecting one arc each in succession to form the final first baseline (171a).

[0148] Next, as shown in FIG. 6m, a second baseline line (171b) extending from the discharge side end of the first baseline line (171a) to the opposite side of the first baseline line (171a) can be drawn to draw the final baseline line (171). For example, the second baseline line (171b) is drawn by rotating 180° from the discharge side end of the first baseline line (171a). Then, the discharge side end of the second baseline line (171b) starts from the discharge side end of the first baseline line (171a) and is offset from the first baseline line (171a), thereby completing the final baseline line (171) that forms the wrap profile of the fixed wrap (143) and the rotating wrap (152).

[0149] Next, as shown in FIG. 6n, a fixed wrap (143) and a turning wrap (152) are drawn on the outer and inner sides of the base line (171) with the base line (171) as the center. In other words, the outer surface (143c) and the inner surface (143d) of the fixed wrap (143) and the outer surface (152c) and the inner surface (152d) of the turning wrap (152) can be drawn by offsetting each half of the turning radius from the base line (171) to the outer and inner sides, respectively. Accordingly, the fixed wrap (143) and the turning wrap (152) can be formed as a multi-arc wrap shape in which an outer section (1521), a connecting section (1522), and a central section (1523) are formed by combining multiple arcs to form a circular wrap.

[0150] In this way, the degree of design freedom for connecting these sections (1431, 1432, 1433)(1521, 1522, 1523) of the fixed lap (143) and / or the turning lap (152) can be increased while forming them into different shapes, that is, different curves.

[0151] Meanwhile, there are other examples of the order of drawing baselines as follows.

[0152] That is, in the above-described embodiment, the arc forming the baseline is derived after drawing both the reference circle and the inscribed circle, but in some cases, the arc may be derived by alternately drawing some reference circles and some inscribed circles with some arcs.

[0153] Figures 7a and 7b are schematic diagrams illustrating another embodiment of the drawing order of the baseline.

[0154] Referring again to FIGS. 6a to 6n, the basic construction sequence of the baseline (171) according to the present embodiment is similar to the above-described embodiment. For example, a baseline curve (173) is constructed from an arbitrary baseline circle (172), a baseline straight line (174a, 174b...) intersecting the baseline curve (173) is constructed, and then a baseline circle (175a, 175b...) centered on the intersection point (P1, P2...) between the baseline curve (173) and the baseline straight line (174a, 174b...) is constructed. And after constructing an inscribed circle (176a, 176b.....) inscribed by two adjacent reference circles (175a, 176b.....), an arc (177a, 177b.....) is derived between the points of contact (A1, A2...)(B1, B2....) where two reference circles (e.g., the first and second reference circles) (175a, 175b.....) touch among the circumferences of the inscribed circles (176a, 176b.....). And after constructing the next inscribed circle (e.g., second inscribed circle) (176b, 176c.....) that is tangent to the next reference circle (e.g., third reference circle) (175c, 175d.....) and then deriving the next arc (e.g., second arc) (177b, 177c.....) between the inscribed circle (176) and the point of contact (A1, A2....) (B1, B2....) that is tangent to the previous arc (e.g., first arc) (177a, 177b....), the baseline (171) can be derived through a series of processes. Accordingly, the central sections (1523) of the fixed lap (143) and the rotating lap (152) each form a multi-circular lap similar to an involute curve, thereby reducing the fluctuation range of gas force and increasing the degree of design freedom when each central section (1523) is connected to a connecting section (1522) formed as a single-circular lap.

[0155] However, in this embodiment, after drawing some reference straight lines (174a, 174b), reference circles (175a, 175b) and inscribed circles (176a), some circular arcs (177a) are first derived and drawn, and then the next reference straight line (174c), the next reference circle (175b) and the next inscribed circle (176b) are each drawn, and then the next circular arc (177b) is derived, and the process of connecting the circular arcs (177a, 177b...) is repeated to derive the final first reference line (171a).

[0156] Specifically, after drawing a reference curve (173) as in Fig. 7a, a first reference straight line (174a) and a second reference straight line (174b) close to the center of the lap (Or) are drawn, and a first reference circle (175a) and a second reference circle (175) are drawn centered on the intersection point (P1) where the first reference straight line (174a) and the second reference straight line (174b) intersect the reference curve (173). Then, after drawing a first inscribed circle (176a) in which these two reference circles (175a) (175b) are inscribed, a first arc (177a) is derived between two contact points (A1) (B1) where the first inscribed circle (176a) is in contact with the first reference circle (175a) and the second reference circle (175b).

[0157] Next, as shown in Fig. 7b, a third reference straight line (174c) and a third reference circle (175c) are drawn, and a second inscribed circle (176b) is drawn where the third reference circle (175c) and the first arc (177a) are in contact. Then, a second arc (177b) can be derived between the two points of contact (A2) (B2) where the first arc (177a) and the third reference circle (175c) are in contact with each other from the circumference of the second inscribed circle (176b). At this time, since the second arc (177b) is connected to the middle of the first arc (177a), the portion of the first arc (177a) after the point of contact (A2) can be excluded from the first basic circle (171a).

[0158] Next, by continuously repeating the processes of FIGS. 7a and 7b above, each arc can be derived, and a part of each arc (177) can be connected to each other to derive the first baseline (171a) for the central section (1523).

[0159] When some of the reference straight lines (174), reference circles (175) and inscribed circles (176) are drawn as described above, and some of the arcs (177) are derived, and then the next inscribed circle (176) inscribed by the reference circle (175) and the next arc (177) is drawn sequentially to derive each arc (177), the arc length of each arc (177) can be varied as needed to further increase the degree of design freedom for the connection between the central section (1523) and the connection section (1522).

[0160] Meanwhile, there are other examples of turning laps, as follows:

[0161] That is, in the embodiment described above, the connecting section of the turning lap is formed as a single circular arc lap shape with one circular arc, but in some cases, the connecting section of the turning lap may be formed as a multi-circular arc lap in which a plurality of circular arcs are combined.

[0162] FIG. 8a is a plan view showing another embodiment of a turning lap, and FIG. 8b is a schematic diagram showing a baseline for the turning lap of FIG. 8a.

[0163] Referring to Fig. 8a, the basic configuration and corresponding operational effects of the rotating wrap (152) according to the present embodiment are similar to those of the previously described embodiment. For example, the rotating wrap (152) according to the present embodiment may be formed of an outer section (1521), a connecting section (1522), and a central section (1523) from the suction end toward the discharge end along the wrap formation direction.

[0164] The outer section (1521) and the central section (1523) can be formed in the same manner as in the above-described embodiment. For example, the outer section (1521) can be formed in a single circular arc wrap shape formed by a single circular arc curve, and the central section (1523) can be formed in a multi-circular arc wrap shape formed by combining multiple circular arcs. Accordingly, in the outer section (1521), the stroke volume can be secured to the maximum extent possible to realize a large capacity of the compressor, while in the central section (1523), since a plurality of circular arcs are formed in combination, the degree of design freedom with respect to the connecting section (1522) connected to the central section (1523) can be increased.

[0165] However, in the present embodiment, as shown in FIG. 8b, the connecting section (1522) may be formed in a multi-arc wrap shape in which a plurality of arcs are combined, similar to the central section (1523). For example, the connecting section (1522) may be formed by continuously connecting a plurality of arcs having different arc centers. In other words, the connecting section (1522) may be formed such that the arc (177b.....) adjacent to the outer section (e.g., the suction end of the orbiting wrap) (1521) is located further from the wrap center (Or) than the arc (177a.....) adjacent to the central section (e.g., the discharge end of the orbiting wrap) (1523). Accordingly, the connecting section (1522) may be formed in a shape that becomes farther from the wrap center (Or) as it goes from the discharge end to the suction end, thereby increasing the degree of design freedom for the connection between the central section (1523) and the outer section (1521).

[0166] Here, the baseline (171) for the connecting section (1522) can be formed through the same drawing method as the center section (1523) illustrated in FIGS. 6A to 6N (or FIGS. 7A and 7B). In other words, the connecting section (1522) can be completed by drawing a reference curve (not shown) to be connected to the center section (1523), drawing a plurality of reference straight lines (not shown) intersecting the reference curve, drawing a plurality of reference circles (not shown) centered on the intersections (not shown) of the reference curves and the reference straight lines, drawing an inscribed circle (not shown) inscribed in the reference circles, and connecting a portion of the arcs (not shown) between the inscribed circles and the two reference circles. The reference curve, reference straight line, reference circle, inscribed circle, and arc in these connecting sections (1522) are drawn in the same manner as the reference curve (173), reference straight line (174), reference circle (175), inscribed circle (176), and arc (177) in the central section (1523) described above, and therefore, the description of the drawing method of the central section (1523) described above will be replaced. Accordingly, the degree of design freedom for connecting the connecting section (1522) and the central section (1523) and / or the connecting section (1522) and the outer section (1521) can be increased.

[0167] In the case where the connecting section (1522) is formed as a multi-arc lap shape composed of multiple arcs as described above, the connecting section (1522) may be understood as a part of the central section (1523). Accordingly, the turning lap (152) is formally divided into an outer section (1521), a connecting section (1522), and a central section (1523), but in terms of content, it may be formed as an outer section (1521) and a central section (1523). Through this, the degree of design freedom for connecting each section (1521, 1522, 1523) of the turning lap (and fixed lap) (152) can be further increased.

[0168] In this case, the connecting section (1522) of the orbital wrap (152) may be formed so that one end thereof is connected to the outer section (1521) at a point less than approximately 360° along the rotation angle of the rotation axis (125) based on the suction end (152a) of the orbital wrap (152). If the connecting section (1522) extends more than 360° from the suction end (152a) of the orbital wrap (152), the outer section (1521), which is a single circular wrap section, may become excessively long, which may cause an increase in noise and / or a decrease in performance that may occur due to the characteristics of the circular wrap. On the other hand, if the connecting section (1522) is formed too close to the suction end (152a) of the orbital wrap (152), the section length of the outer section (1521) may become shorter, which may reduce the effect of increasing the stroke volume. Accordingly, it may be desirable for the connecting section (1522) of the turning wrap (152) to be formed so that one end thereof is connected to the outer section within a range of approximately 180 to 300° along the rotation angle of the rotation axis (125) based on the suction end (152a) of the turning wrap.

[0169] Meanwhile, in the above-described embodiments, when drawing a baseline, a reference curve is first drawn and then multiple reference circles are drawn along the reference curve. However, in some cases, a reference curve may not be drawn.

[0170] For example, after drawing multiple reference lines extending radially from the center of the wrap, a reference circle can be drawn centered at arbitrary points on each of the reference lines. Alternatively, the reference circle can be drawn excluding all of the previous reference curves and lines. In these cases, the degree of design freedom for the central section can be further increased. For example, by increasing the wrap thickness in a specific section of the wrap compared to other sections, the wrap strength in that section can be increased.

Claims

1. A first scroll having a first lap; and A second scroll is coupled to a rotating shaft to perform a rotational motion and has a second wrap to form a compression chamber by interlocking with the first wrap, The above first lap and the above second lap are respectively, Outskirts; A central section located closer to the center of the wrap than the outer section; and Includes a connecting section connecting the outer section and the central section, The outer and inner surfaces of the above central section are A scroll compressor formed by connecting multiple circular arcs in series.

2. In paragraph 1, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which two adjacent arcs have different arc centers.

3. In paragraph 1, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which the radius of curvature of an arc adjacent to the connection section among two adjacent arcs is formed larger than the radius of curvature of an arc far from the connection section.

4. In paragraph 1, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which the arc lengths of adjacent arcs are different.

5. In paragraph 4, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which each arc length is formed to gradually increase toward the connecting section.

6. In paragraph 1, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which each circular length is formed identically.

7. In paragraph 1, The plurality of circular arcs forming the outer and inner surfaces of the above central section are A scroll compressor in which each arc length is formed to gradually decrease toward the connecting section.

8. In paragraph 1, The above first lap and the above second lap, The outer and inner surfaces of each wrap are formed by offset from the base line by a preset distance, The baseline in the above central section is Multiple reference sources, including the first reference source, the second reference source, and the third reference source, are sequentially arranged at preset intervals. A plurality of inscribed circles are sequentially arranged, including a first inscribed circle inscribed by the first reference circle and the second reference circle, and a second inscribed circle inscribed by the first inscribed circle and the third reference circle, Among the circumferences of the first inscribed circle, a plurality of arcs are sequentially arranged, including a first arc between the two contact points where the first reference circle and the second reference circle are in contact, and a second arc between the two contact points where the first arc and the third reference circle are in contact, among the circumferences of the second inscribed circle. A scroll compressor in which each part of the plurality of circular arcs, including a part of the first circular arc and a part of the second circular arc, is connected to each other.

9. In paragraph 8, The above multiple reference sources are, A scroll compressor in which the inner diameter is formed identically.

10. In paragraph 8, The above multiple reference sources are, A scroll compressor formed so that the inner diameter gradually decreases or increases as it goes toward the outer section.

11. In paragraph 8, The above multiple reference sources are, A scroll compressor arranged along a single reference curve extending spirally on an arbitrary base circle.

12. In paragraph 11, The above multiple reference sources are, A scroll compressor in which a plurality of reference straight lines extending radially from the lap center of the first lap or the lap center of the second lap toward the reference curve are arranged, and the plurality of reference straight lines are formed with a plurality of intersection points at which the plurality of reference straight lines intersect the reference curve as the center.

13. In paragraph 12, The above multiple reference lines are, A scroll compressor formed such that the central angle between two adjacent reference straight lines gradually increases toward the outer section.

14. In paragraph 12, The above multiple reference lines are, A scroll compressor in which the central angle between two adjacent reference straight lines gradually decreases or becomes the same as it goes toward the outer section.

15. In paragraph 8, The above multiple inscribed circles are, A scroll compressor formed so that its inner diameter gradually increases toward the outer section.

16. In any one of paragraphs 1 to 15, The outer and inner surfaces of the above connection section are Scroll compressors each formed by a single arc.

17. In paragraph 16, The radius of curvature of the arc forming the outer and inner surfaces of the above connecting section is A scroll compressor formed with a radius of curvature smaller than that of the arc forming the outer surface and inner surface of each of the above outer sections.

18. In paragraph 16, The outer and inner surfaces of the above connection section are A scroll compressor, each of which is connected to the outer surface and the inner surface of the central section within a range of approximately 300 to 360° along the rotation angle of the rotation axis based on the suction end of the first lap and the suction end of the second lap.

19. In any one of paragraphs 1 to 15, The outer and inner surfaces of the above connection section are A scroll compressor formed by connecting multiple circular arcs together.

20. In paragraph 19, The outer and inner surfaces of the above connection section are A scroll compressor in which the end is connected to the outer surface and the inner surface of the outer section within a range of approximately 180 to 300° along the rotation angle of the rotation axis based on the suction end of the first lap and the suction end of the second lap.

Images