Scroll compressor

Abstract

This invention provides a scroll compressor, comprising: a rotating scroll plate that performs a rotary motion; a fixed scroll plate that is combined with the rotating scroll plate to form a compression chamber; and a main frame that is spaced apart from the rotating scroll plate and supports the rotating scroll plate on the opposite side of the fixed scroll plate to enable it to rotate, and is connected to the fixed scroll plate in a supportive manner; the fixed scroll plate is provided with a first back pressure chamber for accommodating gas discharged from the compression chamber and a back pressure hole formed between the compression chamber, the back pressure hole being able to communicate with the first back pressure chamber and the compression chamber according to a preset pressure ratio of the compression chamber.

Description

Technical Field

[0001] This invention relates to scroll compressors, and more specifically, to a scroll compressor in a high-pressure scroll compressor that has a structure for changing the back pressure chamber pressure according to operating conditions. Background Technology

[0002] In a scroll compressor, the gyratory scroll plate and the non-gyratory scroll plate mesh with each other and are combined. While the gyratory scroll plate rotates relative to the non-gyratory scroll plate, it forms a pair of compression chambers.

[0003] The compression chamber consists of an intake chamber formed on the outer perimeter, an intermediate chamber that gradually decreases in volume from the intake chamber toward the center and continues to form, and an exhaust chamber connected to the center side of the intermediate chamber. Typically, the intake chamber is formed by penetrating the side of the non-rotating vortex disk, the intermediate chamber is sealed, and the exhaust chamber is formed by penetrating the end plate of the non-rotating vortex disk.

[0004] Scroll compressors can be classified into low-pressure and high-pressure types based on the refrigerant intake path. Low-pressure compressors connect the refrigerant intake pipe to the internal space of the casing, allowing the low-temperature refrigerant to pass through the casing's internal space and then be guided to the suction pressure chamber. High-pressure compressors, on the other hand, connect the refrigerant intake pipe directly to the suction pressure chamber, allowing the refrigerant to be guided directly to the suction pressure chamber without passing through the casing's internal space.

[0005] In the case of existing scroll compressors, the pressure of the back pressure chamber is adjusted by setting a check valve and machining a back pressure hole.

[0006] Patent document 1 (US Patent 8,998,595 (granted 2015.04.07)) discloses a low-pressure scroll compressor for vehicles. It discloses a technique in which, when the back pressure is insufficient due to the presence of a hole that connects the upper end of the scroll portion of the rotating scroll to the back pressure chamber, high-pressure refrigerant flows into the back pressure chamber from the gap between the scroll portion of the rotating scroll and the scroll portion of the fixed scroll when the rotating scroll moves backward. This causes the pressure in the back pressure chamber to rise, and the rotating scroll then comes into contact with the fixed scroll again, thereby preventing refrigerant leakage between the compression chambers.

[0007] However, while the scroll compressor in Patent Document 1 is applicable to low-pressure scroll structures, it is difficult to apply to high-pressure scroll compressors.

[0008] Therefore, it is necessary to develop a structure that allows for variable back pressure chamber pressure and is applicable to high-pressure scroll compressors.

[0009] Furthermore, a scroll compressor has been disclosed with a structure in which a hole is machined at the bottom of a fixed scroll plate to allow communication with the back pressure chamber at a specific pressure ratio, thereby allowing pressure to flow into the back pressure chamber outside the back pressure chamber of the rotating scroll plate. Such a scroll compressor suffers from a problem where, when operating conditions are changed by communicating with the back pressure chamber at a specific pressure ratio, the compressor's performance changes significantly due to the pressure variation in the back pressure chamber.

[0010] Therefore, it is necessary to develop a scroll compressor that can actively move the axial direction of the scroll plate by utilizing the force relationship between the back pressure chamber and the compression chamber, regardless of operating conditions, thereby maintaining constant performance in most operating ranges.

[0011] On the other hand, in Patent Document 2 (Japanese Patent Publication No. 2013-256919 (published on December 26, 2013)), a scroll compressor with a structure having an intermediate pressure communication hole formed on the back of a fixed scroll disk is disclosed. In such a discharge pressure and intermediate pressure back pressure structure, the periphery of the end plate of the rotating scroll disk is an intermediate pressure space.

[0012] In addition, Patent Document 2 discloses a push-pull groove structure for preventing the high-pressure oil in the push-pull groove from leaking into the suction part of the compression chamber in a structure that supplies high-pressure oil to the push-pull groove of the fixed scroll plate in order to counteract excessive back pressure.

[0013] Patent document 2 discloses a tank that uses high-pressure oil supplied to the tank to counteract the back pressure when the back pressure is too high, and allows the oil to flow.

[0014] However, in Patent Document 2, since the back pressure cannot be adjusted according to the operating conditions, there is a problem that it will not operate normally when the back pressure is low.

[0015] Therefore, there is a need to develop a scroll compressor with an active structure that can adjust the back pressure according to operating conditions, so that it will not operate when the back pressure is too high and will operate when the back pressure is low. Summary of the Invention

[0016] The problem the invention aims to solve

[0017] The present invention was proposed to solve the above-mentioned problems. One object of the present invention is to provide a scroll compressor in a high-pressure scroll compressor that changes the back pressure chamber pressure according to the operating conditions.

[0018] Another object of the present invention is to provide a scroll compressor that, regardless of operating conditions, utilizes the force relationship between the back pressure chamber and the compression chamber to cause the rotary scroll to move actively along the axial direction, thereby enabling it to maintain constant performance in most operating regions.

[0019] Another object of the present invention is to provide a scroll compressor with a structure that allows the pressure of the primary back pressure chamber and the secondary back pressure chamber to be variable.

[0020] Another object of the present invention is to provide a scroll compressor with an active structure that can adjust the back pressure according to the operating conditions, and will not operate when the back pressure is too high, but will operate when the back pressure is reduced.

[0021] means for solving problems

[0022] To address the aforementioned issues, the scroll compressor of the present invention includes: a rotating scroll plate that performs a gyratory motion; a fixed scroll plate that is combined with the rotating scroll plate to form a compression chamber; and a main frame that is spaced apart from the rotating scroll plate and supports the rotating scroll plate on the opposite side of the fixed scroll plate to enable it to rotate, and is connected to the fixed scroll plate in a supportive manner; the fixed scroll plate is provided with a first back pressure chamber for accommodating gas discharged from the compression chamber and a back pressure hole formed between the compression chambers, the back pressure hole being able to communicate with the first back pressure chamber and the compression chambers according to a preset pressure ratio of the compression chambers.

[0023] The back pressure hole may include: a first flow path formed in a direction parallel to the upward direction; and a second flow path formed to communicate with the first flow path and in a direction parallel to the side direction.

[0024] Additionally, the first flow path may include: a compression connection flow path for gas discharged from the compression chamber to flow into; and a back pressure connection flow path connected to the compression connection flow path and configured to communicate with the first back pressure chamber side so as to provide gas flowing through the compression connection flow path to the first back pressure chamber.

[0025] Preferably, the second flow path can be disposed between the compression connection flow path and the back pressure connection flow path.

[0026] A guide inflow section may be provided on the bottom surface of the fixed vortex disk. The guide inflow section guides the discharged gas into the first back pressure chamber and is configured to communicate with the back pressure hole.

[0027] In addition, a pressure regulating pin can be provided in the second flow path to regulate the inflow of gas into the first back pressure chamber.

[0028] Preferably, the first back pressure chamber can be disposed between the top surface of the main frame, the side of the swirling vortex disk, and the bottom surface of the fixed vortex disk.

[0029] The swirling scroll disk may have a disk-shaped swirling end plate portion, the swirling end plate portion having a preset width and supporting the fixed scroll disk, and the first flow path and the second flow path may be arranged on the inner side of the fixed scroll disk based on the outer diameter of the swirling end plate portion.

[0030] An end plate groove formed along the circumferential direction may be provided on one side of the swirling end plate portion. The end plate groove may be positioned at a location that can communicate with the back pressure hole when the swirling vortex disk performs swirling motion.

[0031] The end plate grooves may be provided in a plurality of them on one side of the swivel end plate portion, and the plurality of end plate grooves may be configured to be symmetrical to each other with the center of the swivel end plate portion as a reference.

[0032] When the external pressure of the fixed scroll plate decreases, causing the swirling scroll plate to retract axially, as gas flows into the end plate groove, the pressure in the first back pressure chamber rises, and the swirling end plate can be pressurized axially to engage with the fixed scroll plate.

[0033] The distance from one side of the end plate groove to the outer contour of the compression chamber can be greater than the distance from the other side of the end plate groove to the outer periphery of the rotary end plate.

[0034] The end plate groove can be adjacent to the outer periphery of the swivel end plate portion and separated by a distance equivalent to a seal.

[0035] Preferably, the swirling scroll can have a disc-shaped swirling end plate portion, the swirling end plate portion can have a preset width and support the fixed scroll, a second back pressure chamber can be provided at the lower part of the swirling end plate portion, the second back pressure chamber can be located at a preset distance from the center of the swirling end plate portion, and a back pressure port can be provided in the swirling end plate portion, the back pressure port can communicate with the second back pressure chamber and the bottom surface of the fixed scroll.

[0036] The back pressure port may include: a first passage formed in a direction parallel to the upward direction; and a second passage formed to communicate with the first passage and in a direction parallel to the lateral direction.

[0037] Additionally, the first passage may include: a back pressure chamber connecting flow path for gas discharged from the second back pressure chamber to flow into; and a fixed connecting flow path connected to the back pressure chamber connecting flow path and configured to communicate with the bottom surface of the fixed vortex disk so as to provide gas flowing through the back pressure chamber connecting flow path to the bottom surface of the fixed vortex disk.

[0038] Preferably, a fixing groove can be provided on the bottom surface of the fixed vortex disk so as to communicate with the fixed connecting flow path.

[0039] In addition, a pressure regulating pin can be provided in the second passage to regulate the gas flowing out of the second back pressure chamber.

[0040] To address another of the aforementioned issues, the scroll compressor of the present invention includes: a rotating scroll plate that performs a gyratory motion; a fixed scroll plate that is combined with the rotating scroll plate to form a compression chamber; a main frame that is spaced apart from the rotating scroll plate and supports the rotating scroll plate on the opposite side of the fixed scroll plate to enable it to rotate, and is connected to the fixed scroll plate in a supportive manner; and a housing that internally accommodates the rotating scroll plate, the fixed scroll plate, and the main frame; the fixed scroll plate is provided with a first back pressure chamber for accommodating gas discharged from the compression chamber and a back pressure hole formed between the compression chambers, the back pressure hole being able to communicate with the first back pressure chamber and the compression chambers according to a preset pressure ratio of the compression chambers.

[0041] According to one example related to the present invention, the back pressure hole may include: a first flow path formed in a direction parallel to the upward direction; and a second flow path formed to communicate with the first flow path and formed in a direction parallel to the side direction.

[0042] The first flow path may include: a compression connection flow path for gas discharged from the compression chamber to flow into; and a back pressure connection flow path connected to the compression connection flow path and configured to communicate with the first back pressure chamber side so as to provide gas flowing through the compression connection flow path to the first back pressure chamber.

[0043] A guide inflow section may be provided on the bottom surface of the fixed vortex disk. The guide inflow section guides the discharged gas into the first back pressure chamber and is configured to communicate with the back pressure hole.

[0044] The second flow path may be provided with a pressure regulating pin that can regulate the inflow of gas into the first back pressure chamber.

[0045] The swirling scroll disk may have a disk-shaped swirling end plate portion, which may have a predetermined width and support the fixed scroll disk. The first flow path and the second flow path may be arranged on the inner side of the fixed scroll disk based on the outer diameter of the swirling end plate portion.

[0046] An end plate groove formed along the circumferential direction may be provided on one side of the swirling end plate portion. The end plate groove may be positioned at a location that can communicate with the back pressure hole when the swirling vortex disk performs swirling motion.

[0047] The swirling scroll can have a disc-shaped swirling end plate portion, which can have a preset width and support the fixed scroll. A second back pressure chamber can be provided at the lower part of the swirling end plate portion. The second back pressure chamber can be located at a preset distance from the center of the swirling end plate portion. A back pressure port can be provided on the swirling end plate portion, which can communicate with the second back pressure chamber and the bottom surface of the fixed scroll.

[0048] The back pressure port may include: a first passage formed in a direction parallel to the upward direction; and a second passage formed to communicate with the first passage and in a direction parallel to the lateral direction.

[0049] The first passage may include: a back pressure chamber connecting flow path for gas discharged from the second back pressure chamber to flow into; and a fixed connecting flow path connected to the back pressure chamber connecting flow path and configured to communicate with the bottom surface of the fixed vortex disk so as to provide gas flowing through the back pressure chamber connecting flow path to the bottom surface of the fixed vortex disk.

[0050] A fixing groove can be provided on the bottom surface of the fixed vortex disk so that it can communicate with the fixed connecting flow path.

[0051] Invention Effects

[0052] In the scroll compressor of the present invention, regardless of operating conditions, constant performance can be achieved in most operating regions by utilizing the active axial movement of the rotating scroll plate through the force relationship between the back pressure chamber and the compression chamber.

[0053] The scroll compressor of the present invention is connected to the hole near the upper end of the scroll portion of the fixed scroll and the hole in the outer contour of the fixed scroll at a position that is always blocked when the rotating scroll rotates. Therefore, when the compressor is driven, if the pressure in the first back pressure chamber decreases and the rotating scroll moves backward along the axial direction, a gap is generated between the upper end of the scroll portion of the fixed scroll and the bottom of the rotating scroll. High-pressure gas flows into the first back pressure chamber through this gap, causing the pressure in the back pressure chamber to rise. This causes the rotating scroll to move along the axial direction and maintain the sealing of the compression chamber, thereby increasing the efficiency of the scroll compressor. Attached Figure Description

[0054] Figure 1 This is a cross-sectional view showing the scroll compressor of the present invention.

[0055] Figure 2 This is an enlarged cross-sectional view showing an example in which a back pressure hole is formed on one side of the fixed scroll plate of the scroll compressor of the present invention.

[0056] Figure 3This is an enlarged cross-sectional view showing an example in which a back pressure hole is formed on the other side of the fixed scroll plate of the scroll compressor of the present invention.

[0057] Figure 4 This is a perspective view of the fixed scroll plate of the scroll compressor of the present invention, viewed from the bottom.

[0058] Figure 5 This is a top view of the fixed scroll plate and the rotating scroll plate from above.

[0059] Figure 6 This is an enlarged view showing an example where an end plate groove is formed on the swirling end plate of a vortex disk.

[0060] Figure 7 This is a top view showing an example of a gyratory scroll disk configured in a position relative to a fixed scroll disk.

[0061] Figure 8 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 7 A top view of an example position where the position is rotated at a preset angle.

[0062] Figure 9 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 8 A top view of an example position where the position is rotated at a preset angle.

[0063] Figure 10 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 9 A top view of an example position where the position is rotated at a preset angle.

[0064] Figure 11 This is a partially enlarged view showing an example where the end plate groove is positioned as far out as possible on the swirling end plate portion of the swirling scroll plate, ensuring a sealing distance.

[0065] Figure 12 This is an enlarged cross-sectional view of an example in which back pressure holes are formed on both sides of the fixed scroll plate of the scroll compressor of the present invention, and back pressure ports are formed on both sides of the rotating scroll plate.

[0066] Figure 13 yes Figure 12 Top view.

[0067] Figure 14 It is shown in Figure 12 A top view of an example of a scroll compressor in which a rotating scroll plate is positioned relative to a fixed scroll plate.

[0068] Figure 15 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 14A top view of an example position where the position is rotated at a preset angle.

[0069] Figure 16 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 15 A top view of an example position where the position is rotated at a preset angle.

[0070] Figure 17 This illustrates the configuration of a gyratory scroll disk relative to a fixed scroll disk in a position from... Figure 16 A top view of an example position where the position is rotated at a preset angle.

[0071] Figure 18 This is an enlarged cross-sectional view showing an example in which the fixed scroll plate of the scroll compressor of the present invention does not have a back pressure hole, but the rotating scroll plate has a back pressure port.

[0072] Figure 19 This is an enlarged cross-sectional view showing an example in which pressure regulating pins are respectively provided on the fixed scroll plate and the rotary scroll plate.

[0073] Figure 20 It is a cross-sectional view showing a fixed scroll disk and a rotating scroll disk with back pressure holes. Detailed Implementation

[0074] Hereinafter, with reference to the accompanying drawings, a scroll compressor 100 related to the present invention will be described in detail.

[0075] In this specification, even in different embodiments, the same or similar structural elements are given the same reference numerals, and repeated descriptions thereof are omitted.

[0076] Furthermore, even if the embodiments are different from each other, as long as they are not contradictory in structure and function, the structure applicable to one embodiment can also be applied to another embodiment.

[0077] Unless the context clearly indicates otherwise, singular expressions include plural expressions.

[0078] In describing the embodiments disclosed in this specification, detailed descriptions of relevant prior art are omitted when it is determined that a specific description of such prior art would obscure the gist of the embodiments disclosed in this specification.

[0079] Furthermore, the accompanying drawings are only used to help understand the embodiments disclosed in this specification. The technical ideas disclosed in this specification are not limited to the drawings and should be understood to include all modifications, equivalents, and substitutions within the scope of the ideas and techniques of this invention.

[0080] Hereinafter, the scroll compressor 100 of this embodiment will be described in detail with reference to the accompanying drawings.

[0081] The scroll compressor 100 of the present invention includes: a rotating scroll 150 configured to perform a rotating motion; a fixed scroll 140, which is combined with the rotating scroll 150 to form a compression chamber P; and a main frame 130, which is spaced apart from the rotating scroll 150, supports the rotating scroll 150 on the opposite side of the fixed scroll 140 to enable it to rotate, and is connected to the fixed scroll 140 in a supportable manner.

[0082] The fixed scroll plate 140 is provided with a first back pressure chamber 137a for accommodating the gas discharged from the compression chamber P and a back pressure hole 146 formed between the compression chambers.

[0083] In addition, the back pressure port 146 can communicate with the first back pressure chamber 137a and the compression chamber according to the preset pressure ratio of the compression chamber.

[0084] As described below, the scroll compressor 100 of the present invention, regardless of operating conditions, utilizes the force relationship between the back pressure chamber and the compression chamber to actively move the rotary scroll 150 axially, thereby achieving the effect of maintaining constant performance in most operating ranges.

[0085] Furthermore, the scroll compressor 100 of the present invention is connected to the hole near the upper end of the fixed scroll portion 142 (hereinafter "fixed side scroll portion") and the first back pressure chamber 137a, but through the hole in the outer contour of the fixed scroll 140 which is always blocked when the rotary scroll 150 rotates. Therefore, when the compressor is driven, if the rotary scroll 150 moves backward along the axial direction due to the low pressure in the first back pressure chamber 137a, a gap is generated between the upper end of the fixed side scroll portion 142 and the bottom of the rotary scroll 150. This causes high-pressure gas to flow into the first back pressure chamber 137a from the gap, increasing the pressure in the back pressure chamber and keeping the compression chamber sealed while the rotary scroll 150 moves along the axial direction, thereby improving the efficiency of the scroll compressor 100.

[0086] The detailed structure of the first back pressure chamber 137a and the back pressure port 146 will be described later.

[0087] like Figure 1 As shown, the scroll compressor 100 of the present invention may further include a housing 110 that internally accommodates a rotating scroll 150, a fixed scroll 140, and a main frame 130.

[0088] The housing 110 is configured to have a sealed internal space. As an example, the housing 110 may be configured to have a cylindrical shape.

[0089] A drive motor 120, including a stator 121 and a rotor 122, can be installed inside the housing 110. The stator 121 can be fixedly mounted on the inner circumferential surface of the housing 110 by means of a heat fitting, and the rotor 122 is rotatably disposed inside the stator 121.

[0090] Although not explicitly shown in the accompanying drawings, a coil is wound on the stator 121, and the coil can be electrically connected to an external power source via terminals (not shown) that pass through and are coupled to the housing 110. A rotating shaft 160 is eccentrically coupled to the center of the rotor 122.

[0091] like Figure 1 As shown, a main bearing 171 that supports the rotating shaft 160 radially is pressed into the upper part of the rotating shaft 160. The main bearing 171 can be connected between the main frame 130, the gyratory scroll 150, and the rotating shaft to enable the rotating shaft 160 to rotate. As an example, the main bearing 171 can be constructed as a bushing bearing.

[0092] Furthermore, the lower end of the rotating shaft 160 is rotatably inserted into the sub-frame 170, thereby supporting and rotating the rotating shaft 160 radially by the aforementioned main frame 130 and sub-frame. A main bearing 171 and a secondary bearing (not shown) for supporting the rotating shaft 160 are respectively inserted into the main frame 130 and sub-frame 170. As an example, the main bearing 171 and the secondary bearing can be bushing bearings.

[0093] The main frame 130 has a rotating scroll 150 spaced in the middle, supports the rotating scroll 150 on the opposite side of the fixed scroll 140 so that it can rotate, and is connected to the fixed scroll 140 in a supportive manner.

[0094] The main frame 130 may have a scroll plate fixing part 136 that can support and fix the scroll plate 140 in a fixed manner. In addition, the scroll plate fixing part 136 may have a fastening hole 136a that can fix the scroll plate 140.

[0095] The vortex disk fixing part 136 can be formed in a plurality of parts along the circumferential direction of the main frame 130.

[0096] Although Figure 1 The scroll plate fixing part 136 is shown on the left and right sides of the main frame 130 and cannot be clearly seen, but as an example, four or five scroll plate fixing parts 136 may be formed along the circumferential direction of the main frame 130.

[0097] In addition, the main frame 130 has: a gyratory space 133, which is a space formed on the inside to accommodate the rotating shaft connection 153 so that it can gyrate; and a vortex disk support surface 132, which is disposed around the gyratory space 133 and formed on the top surface of the main frame 130 with a predetermined width.

[0098] As an example, the vortex space 133 can be configured as a cylindrical space. In addition, the vortex disk support surface 132 can be provided circumferentially around the periphery of the vortex space 133.

[0099] The vortex disk 150 is configured to perform gyratory motion. A protruding rotating shaft coupling portion 153 may be formed on one side of the vortex disk 150 to be inserted into a rotating shaft 160 that can be rotated using power transmitted from the outside.

[0100] exist Figure 1 The example shown is an example in which a rotating shaft connection portion 153 is formed protruding from the bottom surface of the rotating end plate portion 151 of the rotating vortex disk 150 described later.

[0101] However, the shape of the rotating shaft connection 153 is not limited to such a structure. It can be constructed as a convex cylindrical structure. In the case that the rotating shaft connection 153 is constructed as a convex cylindrical structure, the upper part of the rotating shaft can also be formed as a structure that is inserted into the convex cylindrical rotating shaft connection 153.

[0102] Additionally, a swirling scroll 150 is disposed on the top surface of the main frame 130. The swirling scroll 150 rotates between the main frame 130 and the fixed scroll 140 described later. In this embodiment, the swirling scroll 150 includes a disc-shaped swirling end plate portion 151 and a swirling scroll portion 152 formed in a spiral shape on one side of the swirling end plate portion 151.

[0103] Reference Figure 2 and Figure 5 Examples are shown, including a disc-shaped swivel end plate portion 151 with a predetermined width and a swirling scroll portion 152 with a spiral cross-section extending upwards on the top surface of the swivel end plate portion 151. The swirling scroll portion 152, together with the fixed-side scroll portion 142 described later, forms a compression chamber P.

[0104] Here, the compression chamber P can be composed of a first compression chamber (not shown) formed on the outer side based on the fixed side vortex portion 142 described later, and a second compression chamber (not shown) formed on the inner side. The first compression chamber and the second compression chamber are respectively formed by a suction pressure chamber (not shown), an intermediate pressure chamber (not shown), and an exhaust pressure chamber (not shown).

[0105] In addition, a rotating shaft coupling portion 153 is provided on the bottom surface of the rotating end plate portion 151, which is coupled with the rotating shaft 160. By rotating the rotating shaft 160, the rotating scroll disk 150 can rotate together.

[0106] A swivel bearing 172 may be provided between the outer periphery of the rotating shaft joint 153 and the inner periphery of the rotating shaft 160.

[0107] On the other hand, an Oldham ring 180 can be provided between the fixed scroll plate 140 and the rotating scroll plate 150 to prevent the rotating motion of the rotating scroll plate 150.

[0108] A back pressure hole 146 is provided on the fixed scroll plate 140. The back pressure hole 146 is configured to be formed between the first back pressure chamber 137a and the compression chamber P. The first back pressure chamber 137a is a space for containing the gas discharged from the compression chamber P.

[0109] As an example, the first back pressure chamber 137a can be disposed between the top surface of the main frame 130, the side of the swirling vortex disk 150, and the bottom surface of the fixed vortex disk 140.

[0110] exist Figure 2 The example shown is an example in which a first back pressure chamber 137a is provided between the top left and right sides of the main frame 130, the left and right sides of the swirling vortex disk 150, and the bottom sides of the fixed vortex disk 140.

[0111] The first back pressure chamber 137a is in Figure 2 It is shown as being set on the left and right sides, but it can be understood as a space formed along the circumferential direction between the main frame 130, the swirling vortex disk 150 and the fixed vortex disk 140.

[0112] In addition, the back pressure port 146 can communicate with the first back pressure chamber 137a and the compression chamber P according to the preset pressure ratio in the compression chamber P.

[0113] The back pressure port 146 may include a first flow path 146a and a second flow path 146b.

[0114] The first flow path 146a can be formed in a direction parallel to the upward direction.

[0115] Additionally, the first flow path 146a may include: a compression connection flow path 146a1, which allows gas discharged from the compression chamber to flow in; and a back pressure connection flow path 146a2, which is connected to the compression connection flow path 146a1 and is configured to be connected to the first back pressure chamber 137a side, so as to provide the first back pressure chamber 137a with gas flowing through the compression connection flow path 146a1.

[0116] like Figure 2As shown, the compression connection flow path 146a1 is connected to the compression chamber in the upward direction, allowing the discharged gas to flow in and move upward. The back pressure connection flow path 146a2 is connected between the second flow path 146b and the first back pressure chamber 137a, thereby allowing the gas supplied through the second flow path 146b to flow downward and be supplied to the first back pressure chamber 137a.

[0117] The second flow path 146b can be configured to connect with the first flow path 146a and be formed in a direction parallel to the lateral direction.

[0118] exist Figure 2 The image shows an example of gas supplied from the first flow path 146a flowing to the right through the second flow path 146b.

[0119] On the other hand, a guide inflow section 147c may be provided on the bottom surface of the fixed vortex disk 140. The guide inflow section 147c guides the discharged gas into the first back pressure chamber 137a and is configured to communicate with the back pressure hole 146.

[0120] exist Figure 2 and Figure 4 The image shows an example where a guide inflow section 147c is provided on the right bottom surface of the fixed vortex disk 140. The guide inflow section 147c is configured to communicate with the back pressure hole 146 to guide the discharged gas into the first back pressure chamber 137a. Figure 4 The example shown is a guide inlet 147c with an elliptical shape.

[0121] Reference Figure 3 ,and Figure 2 In contrast, an example is shown in which a back pressure hole 146 is formed on the fixed scroll disk 140 on the left side, and a first flow path 146a is formed in a direction parallel to the upward direction. The first flow path 146a is configured to include a compression communication flow path 146a1 that allows gas discharged from the compression chamber to flow in and a back pressure communication flow path 146a2 that can communicate with the side of the first back pressure chamber 137a.

[0122] Furthermore, the compression connection flow path 146a1 allows gas discharged from the compression chamber to flow in and enables the inflowing gas to flow towards the second flow path 146b. The compression connection flow path 146a1 enables the gas discharged from the compression chamber to flow upward. The compression connection flow path 146a1 can be provided inside the fixed scroll plate 140 located adjacent to the rotating shaft.

[0123] The second flow path 146b can be disposed between the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2. An example is shown where the second flow path 146b is formed in the left-right direction on the upper side of the fixed scroll disk 140 to connect the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2.

[0124] Reference Figure 3 and Figure 4 The illustration shows an example in which a second flow path 146b is formed on the upper side of the fixed scroll disk 140 and extends between the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2, such that the second flow path 146b with a small circular cross-sectional area extends to the upper part of the fixed scroll disk 140. However, it is not limited to such a circular cross-section.

[0125] The back pressure connecting flow path 146a2 is connected to the second flow path 146b and is formed parallel to the compression connecting flow path 146a1. The back pressure connecting flow path 146a2 is as follows: Figure 3 As shown, the gas supplied from the second flow path 146b can flow downwards to the first back pressure chamber 137a. Additionally, in Figure 3 and Figure 4 The example shown is that the back pressure communication flow path 146a2 is configured on the inner side based on the outer diameter of the swivel end plate portion 151, and is configured on the outer side compared to the compression communication flow path 146a1.

[0126] Thus, in Figure 3 The example shown is an example in which a back pressure hole 146 is formed on the left side of the fixed scroll disk 140.

[0127] On the other hand, Figure 4 The diagram shows an example of a compression connection flow path 146a1, a second flow path 146b, and a back pressure connection flow path 146a2 configured in the shape of micropores with a predetermined diameter.

[0128] Additionally, refer to Figure 5 The diagram shows the swirling end plate portion 151, the swirling scroll portion 152, and the fixed-side scroll portion 142 of the swirling scroll disk 150. An example is shown where a compression connecting flow path 146a1 is formed at a position near the center of the swirling scroll disk 150 in the fixed-side scroll portion 142, and a back pressure connecting flow path 146a2 is formed on both sides of the fixed scroll disk 140.

[0129] Furthermore, the second flow path 146b enables communication between the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2, and is formed on the upper part of the fixed scroll disk 140 as described above.

[0130] The swirling scroll 150 may have a disc-shaped swirling end plate portion 151, which has a predetermined width and supports the fixed scroll 140.

[0131] In addition, the first flow path and the second flow path 146b can be arranged inside the fixed scroll plate 140 with reference to the outer diameter of the swirling end plate portion 151.

[0132] An end plate groove 151a formed along the circumferential direction may be provided on one side of the swirling end plate portion 151. The end plate groove 151a may be located at a position that can communicate with the back pressure hole 146 when the swirling vortex disk 150 rotates.

[0133] The end plate grooves 151a are provided in a plurality of forms on one side of the rotary end plate portion 151, and the plurality of end plate grooves 151a can be configured to be symmetrical to each other with respect to the center of the rotary end plate portion 151.

[0134] In addition, as described above, a guide inflow portion 147c may be provided on the bottom surface of the fixed vortex disk 140 to guide the discharged gas toward the first back pressure chamber 137a and to be formed to communicate with the back pressure hole 146.

[0135] The end plate groove 151a can be formed adjacent to each other on the outer periphery of the swivel end plate portion 151, separated by a distance equivalent to a seal.

[0136] As an example, the end plate groove 151a can be provided on the top surface of the rotary scroll 150 facing the fixed scroll 140.

[0137] Reference Figure 5 and Figure 6 The illustration shows an example in which end plate grooves 151a are formed along the circumferential direction of the swirling end plate portion 151 of the swirling scroll disk 150, and two end plate grooves 151a are arranged symmetrically to each other in the swirling end plate portion 151. The end plate grooves 151a may be formed to have curvature so that they are arranged side by side along the circumference of the swirling end plate portion 151.

[0138] exist Figure 6 The diagram shows an end plate groove 151a formed almost adjacent to the back pressure communication flow path 146a2 of the back pressure hole 146.

[0139] As described above, the end plate groove 151a should be formed at a position where it can communicate with the back pressure hole 146 when the gyratory scroll 150 rotates.

[0140] The distance from one side of the end plate groove 151a to the outer contour of the compression chamber can be greater than the distance from the other side of the end plate groove 151a to the outer periphery of the rotary end plate.

[0141] As an example, when the distance between the end plate groove 151a and the outer contour of the compression chamber is L1, and the distance between the end plate groove 151a and the outer periphery of the rotary end plate portion 151 is L2, L1 must be greater than L2, i.e., L1>L2. If the distance L1 between the end plate groove 151a and the outer contour of the compression chamber is not greater than the distance L2 between the end plate groove 151a and the outer periphery of the rotary end plate portion 151, the high-pressure gas in the end plate groove 151a will enter the suction chamber with a shorter sealing distance, thereby reducing the efficiency of the compressor. That is, in relation to the present invention, it should be understood that the sealing distance to the intermediate pressure space should always be closer than the distance to the compression chamber.

[0142] When the external pressure of the fixed scroll plate 140 decreases and the swirling scroll plate 150 retracts axially, gas flows into the end plate groove 151a, thereby increasing the pressure in the first back pressure chamber 137a. The swirling scroll plate 150 then applies axial pressure to the swirling end plate 151, enabling it to engage with the fixed scroll plate 140.

[0143] Figure 7 This is a top view showing an example of a rotating scroll disk 150 configured in one position relative to a fixed scroll disk 140. Figure 8 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 7 A top view of an example position where the position is rotated around at a preset angle. Figure 9 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 8 A top view of an example position where the position is rotated around at a preset angle. Figure 10 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 9 A top view of an example position where the position is rotated at a preset angle.

[0144] Reference Figures 7 to 10 The formation and arrangement of the end plate groove 151a and back pressure hole 146 of the aforementioned rotating end plate portion 151, which rotates relative to the fixed scroll plate 140 according to the rotating scroll plate 150, will be explained.

[0145] Reference Figure 7 The swirling scroll 150 is positioned relative to the fixed scroll 140, and the end plate groove 151a of the swirling scroll 150 is configured to be separated from the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0146] Reference Figure 8 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 7The position is rotated at a preset angle. The end plate groove 151a on the right side of the rotating scroll 150 is configured to be connected to the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0147] in addition, Figure 8 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 7 The position configured in the middle is based on a 90° rotation relative to the fixed scroll disk 140.

[0148] Reference Figure 9 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 7 The position is a position where the rotating scroll 150 rotates at a preset angle, and the end plate groove 151a of the rotating scroll 150 is configured to be separated from the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0149] in addition, Figure 9 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 7 The position of the configuration is based on a 180° rotation relative to the fixed scroll plate 140.

[0150] Reference Figure 10 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 7 The position is rotated at a preset angle. The end plate groove 151a on the left side of the rotating scroll 150 is configured to be connected to the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0151] in addition, Figure 10 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 7 The position of the configuration is based on a 270° rotation relative to the fixed scroll plate 140.

[0152] Figure 11 This is a partially enlarged view of an example showing an end plate groove 151a located as far out as possible on the swirling end plate portion of the swirling vortex disk 150, while ensuring a sealing distance.

[0153] Reference Figure 11 This illustrates an example of machining the end plate groove 151a of the gyratory scroll 150. In reality, while the diameter of the end plate groove 151a is limited, and grooves can only be designed in specific areas as illustrated, in special cases where the outer diameter of the gyratory end plate portion 151 of the gyratory scroll 150 is not limited, if it is ensured that... Figure 11If the sealing distance of the compression part of the fixed scroll plate 140 is such that the end plate groove 151a can be a groove in the outermost ring shape of the rotating end plate part 151 of the rotating scroll plate 150.

[0154] As mentioned above, in the context of Figure 3 The description section provides an example of a back pressure hole 146 formed on the left side of the fixed scroll plate 140.

[0155] on the other hand, Figure 12 This is an enlarged cross-sectional view showing an example in which back pressure holes 146 are formed on both sides of the fixed scroll plate 140 of the scroll compressor 100 of the present invention, and back pressure ports 158 are formed on both sides of the rotating scroll plate 150. Figure 13 It shows Figure 12 Top view.

[0156] The following is for reference Figure 12 and Figure 13 A scroll compressor 100 with back pressure holes 146 formed on both sides of a fixed scroll plate 140 and back pressure ports 158 formed on both sides of a rotating scroll plate 150 will be described.

[0157] Reference Figure 12 The diagram shows an example where the back pressure orifice 146 faces a direction parallel to the upward direction, and the first flow paths 146a are formed on the left and right sides of the fixed scroll disk 140, respectively. Furthermore, an example is shown where each of the left and right first flow paths 146a is configured to include a compression communication flow path 146a1 that allows gas discharged from the compression chamber to flow in, and a back pressure communication flow path 146a2 that is configured to communicate with the first back pressure chamber 137a side.

[0158] Thus, according to Figure 12 The embodiment of the scroll compressor 100 shown includes a first flow path 146a, which includes a compression connection flow path 146a1 and a back pressure connection flow path 146a2, respectively formed on the left and right sides of the fixed scroll disk 140.

[0159] Furthermore, compression connecting flow paths 146a1 are respectively arranged on the inner sides of the left and right sides of the fixed scroll plate 140 adjacent to the rotating shaft. Gas discharged from the compression chamber flows into the compression connecting flow paths 146a1 respectively arranged on the inner sides of the left and right sides of the fixed scroll plate 140, enabling the incoming gas to flow towards the second flow path 146b. The compression connecting flow paths 146a1 enable the gas discharged from the compression chamber to flow upward.

[0160] In addition, although Figure 12 and Figure 13 It is not explicitly stated in the text, but Figure 12 and Figure 13 The compressed connected flow path 146a1 can be understood as follows: Figure 4As shown, the shape of a micropore with a preset diameter.

[0161] The second flow path 146b can be disposed between the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2. An example is shown in which the second flow path 146b is formed in the left and right directions on the upper left and right sides of the fixed scroll disk 140 to connect the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2.

[0162] Reference Figure 12 and Figure 13 The illustration shows a second flow path 146b formed on the left and right sides of the upper part of the fixed scroll disk 140. Each of the second flow paths 146b on the left and right sides of the upper part of the fixed scroll disk 140 extends between the compression connecting flow path 146a1 and the back pressure connecting flow path 146a2, and the second flow path 146b with a small circular cross-sectional area extends in the upper part of the fixed scroll disk 140. However, it is not limited to such a circular cross-section.

[0163] The back pressure connecting flow path 146a2 is formed to communicate with the second flow path 146b and is parallel to the compression connecting flow path 146a1. Furthermore, the back pressure connecting flow path 146a2 can be formed on the left and right sides of the fixed scroll plate 140 at positions adjacent to the outer periphery of the gyratory end plate portion 151, respectively. The back pressure connecting flow path 146a2 is as follows... Figure 12 As shown, the gas supplied from each of the second flow paths 146b on the left and right sides can flow downwards, thereby supplying the first back pressure chamber 137a. Additionally, in Figure 12 and Figure 13 The diagram shows an example where the back pressure communication flow path 146a2 is located on the outer periphery near the swivel end plate portion 151, compared to the compression communication flow path 146a1 being disposed on the outer contour.

[0164] Based on the cross section, a second back pressure chamber 137b with a width having a predetermined distance from the center of the main frame 130 at the lower part of the aforementioned swivel end plate portion 151 may be provided near the center.

[0165] The second back pressure chamber 137b can be connected to a back pressure port 158, which will be described later.

[0166] Additionally, a back pressure port 158 ​​may be provided on the swivel end plate portion 151, which communicates with the bottom surface of the second back pressure chamber 137b and the fixed vortex disk 140.

[0167] The back pressure port 158 ​​may include a first passage 158a and a second passage 158b. The first passage 158a may be formed in a direction parallel to the upward direction.

[0168] The second passage 158b can be configured to connect with the first passage 158a and be formed in a direction parallel to the lateral direction.

[0169] The first passage 158a may include a back pressure chamber connecting flow path 158a1 and a fixed connecting flow path 158a2.

[0170] The back pressure chamber connecting flow path 158a1 is configured to allow gas discharged from the second back pressure chamber 137b to flow in. That is, it can be understood that the back pressure chamber connecting flow path 158a1 is an inlet for gas discharged from the second back pressure chamber 137b to flow in.

[0171] The fixed connecting flow path 158a2 is connected to the back pressure chamber connecting flow path 158a1, forming a connection that can communicate with the bottom surface of the fixed vortex disk 140, so that the gas flowing through the back pressure chamber connecting flow path 158a1 can be supplied to the bottom surface of the fixed vortex disk 140.

[0172] As described above, the second passage 158b is configured to communicate with the first passage 158a. Figure 12 The diagram shows an example of a second passage 158b configured to connect with a back pressure chamber connecting passage 158a1 and a fixed connecting passage 158a2.

[0173] In addition, Figure 12 The example shown is that a back pressure port 158 ​​communicating with the bottom surface of the second back pressure chamber 137b and the bottom surface of the fixed vortex disk 140 is provided on the bottom surface of the swivel end plate portion 151, and back pressure ports 158 are formed on the left and right sides respectively.

[0174] In more detail, refer to Figure 12 The diagram shows a first passage 158a formed on the left side of the bottom surface of the rotary endplate portion 151 in a direction parallel to the upward direction and a second passage 158b formed in a direction parallel to the side direction. Additionally, the diagram shows a first passage 158a formed on the right side of the bottom surface of the rotary endplate portion 151 in a direction parallel to the upward direction and a second passage 158b formed in a direction parallel to the side direction.

[0175] Additionally, an example is shown where, since the first passage 158a may include a back pressure chamber connecting passage 158a1 and a fixed connecting passage 158a2, the back pressure chamber connecting passage 158a1, the second passage 158b, and the fixed connecting passage 158a2 are formed on the left side of the bottom surface of the swivel end plate portion 151, and the back pressure chamber connecting passage 158a1, the second passage 158b, and the fixed connecting passage 158a2 are formed on the right side of the bottom surface of the swivel end plate portion 151.

[0176] Figure 14 It is shown in Figure 12A top view of an example of a scroll compressor 100 in which the rotating scroll 150 is configured in a position relative to the fixed scroll 140. Figure 15 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 14 A top view of an example position where the position is rotated around at a preset angle. Figure 16 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 15 A top view of an example position where the position is rotated around at a preset angle. Figure 17 This illustrates the configuration of the gyratory scroll 150 relative to the fixed scroll 140. Figure 16 A top view of an example position where the position is rotated at a preset angle.

[0177] Reference Figures 14 to 17 The formation and arrangement of the end plate groove 151a, back pressure hole 146 and back pressure port 158 ​​of the aforementioned rotating end plate portion 151 will be described as the rotating scroll plate 150 rotates relative to the fixed scroll plate 140.

[0178] exist Figures 14 to 17 The figure shows an example in which the back pressure port 158, including the first passage 158a and the second passage 158b, is formed in two parts on the lower left and upper right sides with reference to the center of the vortex disk 150, and is parallel to the vertical direction in the figure.

[0179] Reference Figure 14 The swirling scroll 150 is positioned relative to the fixed scroll 140, and the end plate groove 151a of the swirling scroll 150 is configured to be separated from the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0180] Reference Figure 15 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 14 The position is rotated at a preset angle. The end plate groove 151a on the right side of the rotating scroll 150 is configured to be connected to the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0181] in addition, Figure 15 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 14 The position configured in the middle is based on a 90° rotation relative to the fixed scroll disk 140.

[0182] Reference Figure 16 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 14The position is a position where the rotating scroll 150 rotates at a preset angle, and the end plate groove 151a of the rotating scroll 150 is configured to be separated from the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0183] in addition, Figure 16 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 14 The position configured in the middle is a reference point that rotates 180° relative to the fixed scroll plate 140.

[0184] Reference Figure 17 The gyratory scroll 150 is configured relative to the fixed scroll 140 in a manner from... Figure 14 The position is rotated at a preset angle. The end plate groove 151a on the left side of the rotating scroll 150 is configured to be connected to the back pressure communication flow path 146a2 of the fixed scroll 140 based on the cross section.

[0185] in addition, Figure 17 The configuration of the vortex disk 150 in the middle can be understood as being based on Figure 14 The configuration position is based on a 270° rotation relative to the fixed scroll plate 140.

[0186] A guide inflow section 147c, which guides the discharged gas into the first back pressure chamber 137a and is formed to communicate with the back pressure hole 146, can be provided on the bottom surface of the fixed scroll plate 140.

[0187] Figure 18 This is an enlarged cross-sectional view showing an example in which the fixed scroll plate 140 of the scroll compressor 100 of the present invention does not have a back pressure hole 146, but the rotating scroll plate 150 has a back pressure port 158. Figure 19 This is an enlarged cross-sectional view showing an example in which pressure regulating pins 146b1 and 158b1 are respectively provided on the fixed scroll plate 140 and the rotary scroll plate 150. Figure 20 This is a cross-sectional view showing a fixed scroll 140 and a rotating scroll 150 with back pressure holes 146 formed thereon.

[0188] Figure 18 An example of a scroll compressor 100 in which the back pressure hole 146 is not formed in the fixed scroll disk 140 is shown in the present invention.

[0189] exist Figure 18 The second back pressure chamber 137b of the scroll compressor 100 shown can be connected to the aforementioned back pressure port 158.

[0190] Additionally, an example is shown in which a back pressure port 158 ​​communicating with the bottom surface of the second back pressure chamber 137b and the fixed vortex disk 140 is provided on the left side of the swivel end plate portion 151.

[0191] The back pressure port 158 ​​may include a first passage 158a and a second passage 158b. The first passage 158a may be formed in a direction parallel to the upward direction.

[0192] The second passage 158b can be configured to connect with the first passage 158a and be formed in a direction parallel to the lateral direction.

[0193] The first passage 158a may include a back pressure chamber connecting flow path 158a1 and a fixed connecting flow path 158a2.

[0194] The back pressure chamber connecting flow path 158a1 is configured to allow gas discharged from the second back pressure chamber 137b to flow in. That is, the back pressure chamber connecting flow path 158a1 can be understood as an inlet for gas discharged from the second back pressure chamber 137b to flow in.

[0195] The fixed connecting flow path 158a2 is connected to the back pressure chamber connecting flow path 158a1 and is configured to communicate with the bottom surface of the fixed vortex disk 140 so that the gas flowing through the back pressure chamber connecting flow path 158a1 can be supplied to the bottom surface of the fixed vortex disk 140.

[0196] As described above, the second passage 158b is configured to communicate with the first passage 158a, and Figure 18 An example is shown where the second passage 158b is configured to connect with the back pressure chamber connecting passage 158a1 and the fixed connecting passage 158a2.

[0197] Figure 19 The illustration shows an example of a scroll compressor 100 in which a back pressure hole 146 is formed on the left side of a fixed scroll plate 140 and a back pressure port 158 ​​is formed on the left side of a rotating scroll plate 150.

[0198] Additionally, refer to Figure 19 A pressure regulating pin 146b1 is provided in the second flow path 146b of the aforementioned back pressure hole 146. The flow of gas into the first back pressure chamber 137a can be regulated by the pressure regulating pin 146b1 provided in the second flow path 146b.

[0199] Additionally, refer to Figure 19 A pressure regulating pin 158b1 is provided in the second passage 158b of the back pressure port 158. The gas flowing out of the second back pressure chamber 137b can be regulated by the pressure regulating pin 158b1 provided in the second passage 158b.

[0200] That is, the pressure regulating pins 146b1 and 158b1 can be used to prevent high-pressure gas from suddenly flowing into the back pressure chamber.

[0201] Through the above-described structure, the present invention enables the pressure of the back pressure chambers 137a and 137b in a high-pressure scroll compressor to be changed according to the operating conditions.

[0202] In the scroll compressor 100 of the present invention, regardless of operating conditions, constant performance can be achieved in most operating regions by utilizing the active axial movement of the rotary scroll 150 through the force relationship between the back pressure chambers 137a, 137b and the compression chamber P.

[0203] As described above, the scroll compressor 100 of the present invention is connected to the back pressure hole 146 near the upper end of the fixed-side scroll portion 142 and the first back pressure chamber 137a, but through the hole in the outer contour of the fixed scroll 140 at a position that is always blocked when the rotary scroll 150 rotates. Therefore, when the compressor is driven, if the pressure of the first back pressure chamber 137a is low and the rotary scroll 150 moves backward along the axial direction, a gap is generated between the upper end of the scroll portion 142 of the fixed scroll 140 and the bottom of the rotary scroll 150. This causes high-pressure gas to flow into the first back pressure chamber 137a from the gap, increasing the pressure of the first back pressure chamber 137a and causing the rotary scroll 150 to move axially and keep the compression chamber P sealed, thereby increasing the efficiency of the scroll compressor 100.

[0204] The scroll compressor 100 described above is not limited to the configuration and method of the above embodiments. The embodiments can also be configured by selectively combining all or part of the various embodiments to achieve various modifications.

[0205] This invention may be embodied in other specific forms without departing from the spirit and essential features of the invention, as will be apparent to those skilled in the art. Therefore, the foregoing detailed description should not be construed as restrictive in all respects, but rather as exemplary. The scope of the invention should be determined by a reasonable interpretation of the appended claims, and all modifications within the equivalent scope of the invention are included within the scope of the invention.

[0206] Industrial applicability

[0207] This invention can be applied to scroll compressors in high-pressure scroll compressors, specifically those with a structure that can change the back pressure chamber pressure according to operating conditions.

Claims

1. A scroll compressor, characterized in that, include: The vortex disk rotates in a circular motion. A fixed scroll plate is combined with the rotary scroll plate to form a compression chamber; as well as The main frame, with the rotary scroll disk in the middle, supports the rotary scroll disk on the opposite side of the fixed scroll disk so that it can rotate, and is connected to the fixed scroll disk in a supportive manner. The fixed scroll plate is provided with a first back pressure chamber for accommodating the gas discharged from the compression chamber and a back pressure hole formed between the compression chambers. The back pressure port can communicate with the first back pressure chamber and the compression chamber according to a preset pressure ratio of the compression chamber. The swirling scroll disk has a disc-shaped swirling end plate portion, which has a predetermined width and supports the fixed scroll disk. A circumferentially formed end plate groove is provided on one side of the rotary end plate portion. The end plate groove is positioned so that it can communicate with the back pressure hole when the rotary scroll disk rotates. The distance from one side of the end plate groove to the outer contour of the compression chamber is greater than the distance from the other side of the end plate groove to the outer periphery of the rotary end plate. The end plate groove is adjacent to the outer periphery of the swivel end plate portion and is separated by a distance equivalent to a seal.

2. The scroll compressor according to claim 1, characterized in that, The back pressure port includes: The first flow path forms in a direction parallel to the upward direction; and The second flow path is formed to be able to communicate with the first flow path and is formed in a direction parallel to the lateral direction.

3. The scroll compressor according to claim 2, characterized in that, The first flow path includes: A compression connection path is provided for the gas discharged from the compression chamber to flow into; and A back pressure connecting flow path is connected to the compression connecting flow path and is configured to connect to the first back pressure chamber side so as to provide gas flowing through the compression connecting flow path to the first back pressure chamber.

4. The scroll compressor according to claim 3, characterized in that, The second flow path is disposed between the compression connection flow path and the back pressure connection flow path.

5. The scroll compressor according to claim 3, characterized in that, A guide inflow section is provided on the bottom surface of the fixed vortex disk. The guide inflow section guides the discharged gas into the first back pressure chamber and is configured to communicate with the back pressure hole.

6. The scroll compressor according to claim 3, characterized in that, The second flow path is provided with a pressure regulating pin that can regulate the inflow of gas into the first back pressure chamber.

7. The scroll compressor according to claim 1, characterized in that, The first back pressure chamber is located between the top surface of the main frame, the side of the swirling vortex disk, and the bottom surface of the fixed vortex disk.

8. The scroll compressor according to claim 2, characterized in that, The first flow path and the second flow path are arranged on the inner side of the fixed scroll disk, with the outer diameter of the swirling end plate as a reference.

9. The scroll compressor according to claim 1, characterized in that, The end plate grooves are provided in a plurality of manner on one side of the swivel end plate portion, and the plurality of end plate grooves are arranged symmetrically with respect to the center of the swivel end plate portion.

10. The scroll compressor according to claim 1, characterized in that, When the external pressure of the fixed scroll plate decreases, causing the swirling scroll plate to retract axially, as gas flows into the end plate groove, the pressure in the first back pressure chamber rises, and the swirling end plate is pressurized axially to engage with the fixed scroll plate.

11. The scroll compressor according to claim 2, characterized in that, A second back pressure chamber is provided at the lower part of the swivel endplate portion. The second back pressure chamber has a width at a predetermined distance from the center of the swivel endplate portion. A back pressure port is provided on the gyratory end plate, and the back pressure port is connected to the bottom surface of the second back pressure chamber and the fixed vortex disk.

12. The scroll compressor according to claim 11, characterized in that, The back pressure port includes: The first pathway forms in a direction parallel to the upward direction; and The second passage is formed to connect with the first passage and is formed in a direction parallel to the lateral direction.

13. The scroll compressor according to claim 12, characterized in that, The first pathway includes: The back pressure chamber is connected to a flow path for gas discharged from the second back pressure chamber to flow into; and A fixed connecting flow path is connected to the back pressure chamber connecting flow path and is configured to connect with the bottom surface of the fixed vortex disk so as to provide gas flowing through the back pressure chamber connecting flow path to the bottom surface of the fixed vortex disk.

14. The scroll compressor according to claim 12, characterized in that, The second passage is provided with a pressure regulating pin that can regulate the gas flowing out of the second back pressure chamber.

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