Scroll compressor

Abstract

The present invention relates to a scroll compressor. The scroll compressor includes a housing, a revolving scroll that performs a revolving motion in combination with a rotating shaft in an inner space of the housing, a non-revolving scroll that is engaged with the revolving scroll to form a compression chamber, the non-revolving scroll being formed with a discharge port and a bypass hole to discharge refrigerant of the compression chamber, and a back pressure chamber assembly that is combined to a back surface of the non-revolving scroll to apply pressure to the non-revolving scroll toward the revolving scroll side, the back surface of the non-revolving scroll being recessed by a predetermined depth to form a valve receiving groove portion, the discharge port and the bypass hole being received in the valve receiving groove portion, a valve guide being provided between the back surface of the non-revolving scroll and a back surface of the back pressure chamber assembly that faces the back surface of the non-revolving scroll, and a bypass valve guide hole being provided in the valve guide to allow a bypass valve that opens and closes the bypass hole to be inserted in an axial direction in a slidable manner.

Description

Technical Field

[0001] This invention relates to scroll compressors. Background Technology

[0002] In a scroll compressor, the gyratory scroll plate and the non-gyratory scroll plate mesh with each other. While the gyratory scroll plate rotates relative to the non-gyratory scroll plate, two compression chambers are formed between the gyratory scroll plate and the non-gyratory scroll plate.

[0003] The compression chamber consists of an outer suction chamber, an intermediate chamber whose volume gradually decreases from the suction chamber to the center, and a discharge chamber that is continuous with the center of the intermediate chamber. Typically, the suction chamber penetrates the side of the non-rotating scroll plate and is connected to the refrigerant suction pipe. The intermediate chambers are sealed and connected in multiple stages. The discharge chamber penetrates the center of the end plate of the non-rotating scroll plate and is connected to the refrigerant discharge pipe.

[0004] Scroll compressors are characterized by a continuously moving compression chamber, which can lead to overcompression during operation. Therefore, in existing technology, a bypass orifice is formed around the discharge port, located upstream of the discharge port, to pre-discharge the refrigerant that would otherwise be overcompressed. A bypass valve is installed in the bypass orifice, which opens and closes according to the pressure in the compression chamber. The bypass valve is primarily a plate valve or a reed valve.

[0005] Patent Document 1 (US Patent Publication US2018 / 0038370A1) discloses a scroll compressor employing a bypass valve composed of a plate-shaped valve. In Patent Document 1, a single, annular bypass valve is used to open and close multiple bypass orifices. However, in this case, the number of parts increases because the bypass valve is supported by an elastic member. Furthermore, since the bypass valve operates in a disengaged state, modularization is difficult, potentially increasing compressor assembly time. Additionally, the increased length of the bypass orifices may not only cause overcompression due to discharge delay but also increase dead volume, reducing indicating efficiency.

[0006] Patent Document 2 (Korean Patent Publication No. 10-2014-0114212) and Patent Document 3 (US Patent Publication US2015 / 0345493A1) disclose a scroll compressor employing a bypass valve consisting of a reed valve. In Patent Documents 2 and 3, rivets or pins are used to fix the bypass valve to the non-rotating scroll plate, respectively. In this case, the end plate of the non-rotating scroll plate needs to have a thickness corresponding to the rivet or pin depth, thus the length of the bypass orifice becomes correspondingly longer. Therefore, as described in Patent Document 1, refrigerant discharge through the bypass orifice is delayed, which may not only lead to overcompression but also increase the dead volume corresponding to the longer bypass orifice, resulting in a decrease in indicated efficiency. Summary of the Invention

[0007] The purpose of this invention is to provide a scroll compressor that can reduce dead volume while suppressing overcompression in the compression chamber.

[0008] Furthermore, the present invention aims to provide a scroll compressor that can reduce the dead volume in the bypass hole by shortening the length of the bypass hole.

[0009] Furthermore, the purpose of this invention is to provide a scroll compressor that can both shorten the length of the bypass orifice and stably fix the bypass valve.

[0010] Another object of the present invention is to provide a scroll compressor capable of reducing the dead volume in the discharge port.

[0011] Furthermore, the present invention aims to provide a scroll compressor that can reduce the dead volume in the discharge port by shortening the length of the discharge port.

[0012] Furthermore, the object of the present invention is to provide a scroll compressor that can improve compression efficiency by rapidly discharging refrigerant through the discharge port.

[0013] Another object of the present invention is to provide a scroll compressor in which a bypass valve and a discharge valve can be easily installed.

[0014] Furthermore, the present invention aims to provide a scroll compressor that improves the assemblability and assembly reliability of the bypass valve and the discharge valve by modularizing the bypass valve and the discharge valve.

[0015] Furthermore, the purpose of this invention is to provide a scroll compressor that can modularize the bypass valve and discharge valve, and can rapidly discharge refrigerant through the bypass port and discharge port.

[0016] To achieve the objectives of this invention, a scroll compressor includes: a housing, a rotating scroll plate, a non-rotating scroll plate, and a back pressure chamber assembly. The rotating scroll plate rotates within the internal space of the housing in conjunction with a rotating shaft. The non-rotating scroll plate engages with the rotating scroll plate to form a compression chamber, and has a discharge port and a bypass port to discharge refrigerant from the compression chamber. The back pressure chamber assembly is attached to the back side of the non-rotating scroll plate, applying pressure to the non-rotating scroll plate towards the rotating scroll plate. A valve receiving groove is formed on the back side of the non-rotating scroll plate by a predetermined depth, and the discharge port and the bypass port are received in the valve receiving groove. A valve guide is provided between the back side of the non-rotating scroll plate and the back side of the back pressure chamber assembly facing the back side of the non-rotating scroll plate. A bypass valve guide hole is provided in the valve guide, allowing a bypass valve for opening and closing the bypass hole to be slidably inserted axially. Therefore, the bypass valve that suppresses overcompression of the compression chamber is not fastened to the non-rotating end plate, allowing the non-rotating end plate to be formed with a thinner thickness. As the thickness of the non-rotating end plate decreases, the length of the bypass hole shortens, thereby reducing the dead volume in the bypass hole.

[0017] As an example, the back pressure chamber assembly has an intermediate discharge port that communicates with the internal space of the housing. A discharge guide channel can be formed between the valve guide and the valve receiving groove, allowing the discharge port and the bypass hole to communicate with the intermediate discharge port. Therefore, even with a valve guide provided between the bypass hole and the intermediate discharge port, the refrigerant discharged through the discharge port and / or bypass hole can move smoothly towards the intermediate discharge port.

[0018] Specifically, the thickness of the valve guide can be less than the depth of the valve receiving groove, forming a first discharge guide channel between the first side surface of the valve guide and the valve receiving groove. The cross-sectional area of ​​the valve guide can be less than the cross-sectional area of ​​the valve receiving groove, forming a second discharge guide channel between the outer peripheral surface of the valve guide and the inner peripheral surface of the valve receiving groove. The first discharge guide channel and the second discharge guide channel can communicate with each other. Thus, the discharge guide channels can be formed on the bottom and side surfaces of the valve guide, thereby enabling the valve guide to be inserted into the valve receiving groove and allowing the refrigerant discharged through the discharge port and / or bypass hole to move smoothly towards the central discharge port.

[0019] Specifically, the valve guide may have a discharge valve guide hole, and the discharge valve, which opens and closes the discharge port, is slidably inserted into the discharge valve guide hole. The bypass valve guide holes may be formed on both sides of the valve guide, separated by the discharge valve guide holes. Thus, by forming the bypass valve and the discharge valve as piston valves, the bypass valve and the discharge valve can be modularized together with the valve guide, thereby facilitating the assembly of the bypass valve and the discharge valve.

[0020] As another example, a guide insertion groove can be formed on the back side of the non-rotating scroll plate, the guide insertion groove being recessed to a predetermined depth outside the valve receiving groove. The valve guide can be inserted into the guide insertion groove and fixed to the back side of the back pressure chamber assembly. Thus, the valve guide is fixed to the back pressure chamber assembly and assembled between the back pressure chamber assembly and the non-rotating end plate, thereby enabling easy assembly of the valve assembly including the valve guide. Simultaneously, the bypass valve and / or discharge valve are constructed as piston valves, making the thickness of the non-rotating end plate thinner, thereby reducing the dead volume in the bypass orifice and / or discharge port.

[0021] Specifically, the guide insertion groove can be formed by extending outward from the inner circumference of the valve receiving groove. The depth of the guide insertion groove can be less than or equal to the depth of the valve receiving groove. Thus, it is possible to insert the valve guide into the valve receiving groove while ensuring space between the valve guide and the valve receiving groove facing it axially to form a discharge guide channel.

[0022] Specifically, a guide-separating protrusion extending axially toward the back side of the back pressure chamber assembly can be formed on the second axial side of the valve guide facing the back pressure chamber assembly. The height of the guide-separating protrusion can be less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove. Thus, both a distance for the ejection guide channel can be ensured between the valve guide and the back pressure chamber assembly, and a distance for the ejection guide channel can be ensured between the valve guide and the valve receiving groove facing it axially.

[0023] More specifically, the valve guide may be formed with a guide fastening hole through which a fastening member for fastening to the non-rotating scroll plate passes. The guide fastening hole may be formed axially through the spaced protrusion of the guide. Thus, the length of the guide fastening hole is increased, thereby enabling stable support of the fastening member even if the valve guide is thin.

[0024] Specifically, a discharge guide groove for accommodating the bypass valve can be formed on the back side of the back pressure chamber assembly facing the valve guide. The depth of the discharge guide groove can be less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove. Thus, by suppressing excessive opening of the bypass valve, not only can the bypass valve operate stably when open, but it can also be quickly closed to suppress refrigerant backflow through the bypass orifice.

[0025] More specifically, the back pressure chamber assembly may have an intermediate discharge port that communicates the discharge port and the bypass port with the internal space of the housing. The discharge guide groove may be formed in an annular shape and communicate with the intermediate discharge port. Thus, even if the valve guide is located between the discharge port and the bypass port and the intermediate discharge port, a large discharge guide channel can be ensured between the discharge port and the bypass port and the intermediate discharge port, thereby enabling the refrigerant to be discharged smoothly.

[0026] More specifically, a guide-separating protrusion extending axially toward the back side of the back pressure chamber assembly can be formed on the second axial side of the valve guide facing the back pressure chamber assembly. A discharge guide groove for accommodating the bypass valve can be formed on the back side of the back pressure chamber assembly facing the valve guide. The sum of the height of the guide-separating protrusion and the depth of the discharge guide groove can be less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove. Thus, by suppressing excessive opening of the bypass valve, not only can the bypass valve operate stably when open, but it can also be quickly closed to suppress refrigerant backflow through the bypass orifice.

[0027] In another embodiment, the valve guide may include a guide body and a guide fixing protrusion. The guide body can be inserted into the valve receiving groove. The guide fixing protrusion extends from the guide body and is inserted into the guide insertion groove, and the guide fastening hole can axially penetrate the guide fixing protrusion. The valve guide can be fixed to the back of the back pressure chamber assembly using a fastening member that is fastened to the back of the back pressure chamber assembly through the guide fastening hole. Thus, the valve assembly including the valve guide can be easily and stably fixed to the back pressure chamber assembly, and by reducing the thickness of the non-rotating end plate, the dead volume in the discharge port and / or bypass hole can be reduced.

[0028] In another embodiment, the valve guide may include a guide body and a guide fixing protrusion. The guide body can be inserted into the valve receiving groove, and the guide fixing protrusion extends from the guide body and is inserted into the guide insertion groove. At least one of the guide insertion groove and the guide fixing protrusion facing the guide insertion groove may have an axially extending guide support surface. The guide fixing protrusion of the valve guide can be pressed and fixed by the non-rotating scroll plate and the back pressure chamber assembly using the guide support surface. Thus, the valve assembly including the valve guide can be stably fixed to the back pressure chamber assembly without additional fastening members, while reducing the dead volume in the discharge port and / or bypass hole by reducing the thickness of the non-rotating end plate.

[0029] As another example, a guide receiving groove can be formed by recessing a predetermined depth on the back side of the back pressure chamber assembly. The valve guide can be accommodated in the guide receiving groove and fixed to the back side of the non-rotating scroll plate outside the valve receiving groove. Thus, the valve guide is inserted and fixed to the non-rotating end plate, allowing for easy assembly of the valve assembly including the valve guide. Simultaneously, the bypass valve and / or discharge valve are constructed as piston valves, reducing the thickness of the non-rotating end plate and thereby reducing the dead volume in the bypass orifice and / or discharge port.

[0030] Specifically, the back pressure chamber assembly may have an intermediate discharge port that communicates the discharge port and the bypass port with the internal space of the housing. A discharge guide channel communicating with the intermediate discharge port may be continuously formed between the valve guide and the valve receiving groove, and between the valve guide and the guide groove. This allows the valve guide to be inserted and fixed to both the non-rotating scroll plate and the back pressure chamber assembly, and also enables the refrigerant discharged from the bypass port and / or discharge port to move rapidly towards the intermediate discharge port by ensuring a discharge guide channel between the valve guide and the non-rotating scroll plate.

[0031] More specifically, a valve guide groove may be formed on the inner side of the intermediate discharge port to accommodate a discharge valve for opening and closing the discharge port. The guide receiving groove and the valve guide groove may overlap radially. This allows the valve guide to be inserted into the back pressure chamber assembly while ensuring a discharge guide channel between the valve guide and the intermediate discharge port.

[0032] As another example, the valve guide may include a guide body and a guide fixing protrusion. The guide body can be inserted into the valve receiving groove, and the guide fixing protrusion can extend from the guide body to the outside of the valve receiving groove. The guide fastening hole can penetrate the guide fixing protrusion axially. The valve guide can be fixed to the back of the non-rotating scroll plate using a fastening member that is fastened to the back of the non-rotating scroll plate through the guide fastening hole. Thus, the valve assembly including the valve guide can be easily and stably fixed to the non-rotating scroll plate, while reducing the thickness of the non-rotating end plate reduces the dead volume in the discharge port and / or bypass hole.

[0033] As another example, the valve guide may include a guide body and a guide fixing protrusion. The guide body can be inserted into the valve receiving groove, and the guide fixing protrusion can extend from the guide body to the outside of the valve receiving groove. At least one of the guide receiving groove and the guide fixing protrusion facing the guide receiving groove may have an axially extending guide support surface. The guide fixing protrusion of the valve guide can be pressed and fixed by the non-rotating scroll plate and the back pressure chamber assembly using the guide support surface. Thus, the valve assembly including the valve guide can be stably fixed to the non-rotating scroll plate without additional fastening members, while reducing the dead volume in the discharge port and / or bypass hole by reducing the thickness of the non-rotating end plate.

[0034] Furthermore, the thickness of the valve guide inserted into the valve receiving groove can be greater than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove. Thus, by ensuring the support length for the bypass valve, the valve can be stably supported when the bypass valve is open, while by shortening the closing time of the bypass valve, backflow via the bypass orifice can be suppressed.

[0035] Additionally, the bypass valve may include one or more guide portions and opening / closing portions. The guide portion can be slidably inserted into the bypass valve guide hole, and the opening / closing portion can be disposed at one end of the guide portion and open / close the bypass hole. Thus, as the bypass valve is formed from a piston valve, the thickness of the non-rotating end plate is reduced, thereby reducing the dead volume in the bypass hole.

[0036] Specifically, a stop portion extending laterally from the guide portion can be formed at the other end of the guide portion. The cross-sectional area of ​​the stop portion can be larger than the cross-sectional area of ​​the bypass valve guide hole, such that the stop portion is axially supported on the second axial side of the valve guide. Thus, by limiting the opening degree of the bypass valve, not only can the bypass valve operate stably, but the valve responsiveness can also be improved.

[0037] Specifically, the cross-sectional area of ​​the opening / closing portion can be larger than the cross-sectional area of ​​the bypass valve guide hole, so that the opening / closing portion is axially supported on the first axial side of the valve guide. Therefore, by limiting the opening degree of the bypass valve, not only can the bypass valve operate stably, but the valve responsiveness can also be improved.

[0038] Specifically, a weight-reducing section can be formed inside the bypass valve. This weight-reducing section is formed by recessing a predetermined depth from one end of the bypass valve to the other end. Therefore, by reducing the weight of the bypass valve, the valve responsiveness can be improved.

[0039] More specifically, the weight-reducing portion can be formed by recessing into the opening and closing portion from the opposite side. An oil drain hole can be formed in the guide portion, extending from the inner circumference of the weight-reducing portion to the outer circumference of the guide portion. Thus, a weight-reducing portion can be formed in the bypass valve, and the opening and closing portion can be formed into a blocking shape, thereby reducing the actual dead volume in the bypass orifice. At the same time, by suppressing oil deposition inside the weight-reducing portion, valve responsiveness can be improved. Attached Figure Description

[0040] Figure 1 This is a longitudinal sectional view showing the interior of the variable capacity scroll compressor of the present invention.

[0041] Figure 2 It is Figure 1 An exploded perspective view of an embodiment of the valve assembly is shown.

[0042] Figure 3 It is Figure 2 The valve assembly is assembled into the back pressure chamber assembly, and a perspective view is shown.

[0043] Figure 4 It is Figure 3 The back pressure chamber assembly is assembled onto a non-rotating vortex disk and is shown in cross-sectional view.

[0044] Figure 5 yes Figure 4 Sectional view along line "Ⅸ-Ⅸ".

[0045] Figure 6 It is Figure 2 An enlarged perspective view of the valve guide and bypass valve.

[0046] Figure 7 It is Figure 3 Another embodiment of the bypass valve is shown in a cutaway perspective view.

[0047] Figure 8 yes Figure 7 Assembly sectional view.

[0048] Figure 9 It is shown Figure 2 A perspective view of another embodiment of the assembly structure of the valve guide.

[0049] Figure 10 yes Figure 9 Assembly sectional view.

[0050] Figure 11 It is Figure 1 An exploded perspective view of another embodiment of the valve assembly is shown.

[0051] Figure 12 It is Figure 11 The valve assembly is assembled onto a non-rotating vortex disk, and a three-dimensional view is shown.

[0052] Figure 13 It is Figure 12 The back pressure chamber assembly is assembled onto a non-rotating vortex disk and is shown in cross-sectional view.

[0053] Figure 14 yes Figure 13 A sectional view along the “XX” line.

[0054] Figure 15 It is Figure 12 An enlarged perspective view of the valve guide and bypass valve.

[0055] Figure 16 and Figure 17 This is a perspective view showing a cross-section of another embodiment of the bypass valve.

[0056] Figure 18 It is shown Figure 11 A perspective view of another embodiment of the assembly structure of the valve guide.

[0057] Figure 19 yes Figure 18 Assembly sectional view. Detailed Implementation

[0058] The scroll compressor of the present invention will now be described in detail with reference to an embodiment shown in the accompanying drawings.

[0059] Generally, scroll compressors are classified into open-type and closed-type based on whether the drive unit (electric motor) and the compressor unit are housed together within the casing. In the former, the electric motor constituting the drive unit is separate from the compressor unit; in the latter, the electric motor and compressor unit are housed within the same casing. The following description uses a closed-type scroll compressor as an example, but it is not necessarily limited to closed-type scroll compressors. In other words, the present invention can also be applied to open-type scroll compressors with separate electric motor and compressor units.

[0060] Furthermore, scroll compressors are classified into low-pressure compressors and high-pressure compressors based on the type of pressure section formed within the internal space of the casing, particularly in hermetic scroll compressors where the space housing the electric motor is located. In the former, this space forms a low-pressure section, and the refrigerant suction pipe communicates with this space. In the latter, this space forms a high-pressure section, and the refrigerant suction pipe penetrates the casing and is directly connected to the compression section. This embodiment uses a low-pressure scroll compressor as an example for explanation. However, it is not limited to low-pressure scroll compressors.

[0061] Furthermore, scroll compressors can be divided into vertical scroll compressors, where the rotating shaft is arranged perpendicularly to the ground, and horizontal scroll compressors, where the rotating shaft 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 explanation uses a vertical scroll compressor as an example. However, the same or similar interpretations can be applied to horizontal scroll compressors. Therefore, in the following text, axial direction can be understood as the axial direction of the rotating shaft, radial direction can be understood as the radial direction of the rotating shaft, and axial direction can be understood as the up-down direction, radial direction can be understood as the left and right sides, inner circumferential surface can be understood as the top surface, and axial and radial directions can be understood as the sides.

[0062] Furthermore, based on the sealing method between the compression chambers, scroll compressors can be broadly classified into tip seal type and back pressure type. Back pressure type can be further divided into rotary back pressure type, where the rotary scroll plate presses towards the non-rotary scroll plate side, and non-rotary back pressure type, where the non-rotary scroll plate presses towards the rotary scroll plate side. The following explanation uses a scroll compressor employing the non-rotary back pressure type as an example. However, this invention can be applied not only to rotary back pressure type but also to tip seal type compressors.

[0063] Figure 1 This is a longitudinal sectional view showing the interior of the variable capacity scroll compressor of the present invention. Figure 2 It is Figure 1 An exploded perspective view of an embodiment of the valve assembly is shown.

[0064] In the scroll compressor of this embodiment, a drive motor 120 constituting the electric motor is provided in the lower half of the housing 110, and a main frame 130 constituting the compression unit, a rotary scroll plate 140, a non-rotating scroll plate 150, a back pressure chamber assembly 160, and a valve assembly 170 are provided above the drive motor 120. The electric motor is connected to one end of the rotating shaft 125, and the compression unit is connected to the other end of the rotating shaft 125. Thus, the compression unit is connected to the electric motor via the rotating shaft 125 and operates by the rotational force of the electric motor.

[0065] Reference Figure 1The housing 110 in this embodiment includes: a cylindrical outer shell 111, an upper cap 112, and a lower cap 113.

[0066] The cylindrical outer shell 111 is a cylindrical shape with openings at both the top and bottom. The aforementioned drive motor 120 and main frame 130 are inserted into and fixed to its inner circumferential surface. A terminal block bracket (not shown) is attached to the upper half of the cylindrical outer shell 111. A terminal block (not shown) for transmitting external power to the drive motor 120 passes through and is attached to the terminal block bracket. In addition, the refrigerant suction pipe 117, described later, passes through and is attached to the upper half of the cylindrical outer shell 111, for example, above the drive motor 120.

[0067] The upper cap 112 is joined to cover the open upper end of the cylindrical outer shell 111. The lower cap 113 is joined to cover the open lower end of the cylindrical outer shell 111. The edge of the high-low pressure separation plate 115, described later, is inserted between the cylindrical outer shell 111 and the upper cap 112, and is fused together with the cylindrical outer shell 111 and the upper cap 112. The edge of the support bracket 116, described later, is inserted between the cylindrical outer shell 111 and the lower cap 113, and can be fused together with the cylindrical outer shell 111 and the lower cap 113. Thus, the internal space of the housing 110 is sealed.

[0068] As described above, the edge of the high-low pressure separation plate 115 is fused to the housing 110. The central portion of the high-low pressure separation plate 115 is bent protruding towards the upper side of the upper cap 112 and is disposed on the upper side of the back pressure chamber assembly 160 described later. A refrigerant suction pipe 117 is connected to the lower side below the high-low pressure separation plate 115, and a refrigerant discharge pipe 118 is connected to the upper side above the high-low pressure separation plate 115. Thus, a low-pressure section 110a constituting the suction space can be formed on the lower side of the high-low pressure separation plate 115, and a high-pressure section 110b constituting the discharge space can be formed on the upper side of the high-low pressure separation plate 115.

[0069] Additionally, a through hole 115a is formed in the center of the high-low pressure separation plate 115. A sealing plate 1151, which is to be installed and removed from the floating plate 165 (described later), is inserted into and engaged with the through hole 115a. The low-pressure section 110a and the high-pressure section 110b can be blocked by the installation and removal of the floating plate 165 and the sealing plate 1151, or they can be connected through the high-low pressure communication hole 1151a of the sealing plate 1151.

[0070] Furthermore, the lower cap 113, together with the lower half of the cylindrical outer shell 111 that constitutes the low-pressure section 110a, forms an oil storage space 110c. In other words, the oil storage space 110c is formed in the lower half of the low-pressure section 110a, and the oil storage space 110c constitutes a part of the low-pressure section 110a.

[0071] Reference Figure 1In this embodiment, the drive motor 120 is disposed in the lower half of the low-pressure section 110a, and includes a stator 121 and a rotor 122. The stator 121 is fixed to the inner wall of the cylindrical outer shell 111 by heat pressing, and the rotor 122 is disposed inside the stator 121 in a rotatable manner.

[0072] The stator 121 includes a stator core 1211 and a stator coil 1212.

[0073] The stator core 1211 is formed into a cylindrical shape and is fixed to the inner circumferential surface of the cylindrical outer shell 111 by heat pressing. The stator coil 1212 is wound around the stator core 1211 and is electrically connected to an external power source through terminals (not shown) that pass through and are connected to the housing 110.

[0074] The rotor 122 includes a rotor core 1221 and a permanent magnet 1222.

[0075] The rotor core 1221 is formed in a cylindrical shape and is inserted into the stator core 1211 in a rotatable manner with a predetermined air gap. The permanent magnet 1222 is embedded into the rotor core 1221 at predetermined intervals along the circumferential direction.

[0076] Additionally, a rotating shaft 125 is pressed into and attached to the center of the rotor core 1221. The cyclone scroll 140, described later, is eccentrically attached to the upper end of the rotating shaft 125. Thus, the rotational force of the drive motor 120 can be transmitted to the cyclone scroll 140 through the rotating shaft 125.

[0077] An eccentric portion 1251 is formed at the upper end of the rotating shaft 125, which is eccentrically coupled to the vortex disk 140 described later. An oil suction device 126 may be provided at the lower end of the rotating shaft 125, which is used to draw oil stored in the lower part of the housing 110 upwards. An axially penetrating oil flow path 1252 is formed inside the rotating shaft 125.

[0078] Reference Figure 1 In this embodiment, the main frame 130 is disposed on the upper side of the drive motor 120 and is fixed to the inner wall surface of the cylindrical outer shell 111 by heat pressing or by welding.

[0079] The main frame 130 of this embodiment includes: a main flange portion 131, a main bearing portion 132, a swirling space portion 133, a vortex disk support portion 134, a cross ring support portion 135, and a frame fixing portion 136.

[0080] The main flange portion 131 is formed in an annular shape and is accommodated in the low-pressure portion 110a of the housing 110. The outer diameter of the main flange portion 131 is smaller than the inner diameter of the cylindrical housing 111, such that the outer peripheral surface of the main flange portion 131 is separated from the inner peripheral surface of the cylindrical housing 111. However, the frame fixing portion 136, described later, protrudes radially from the outer peripheral surface of the main flange portion 131. The outer peripheral surface of the frame fixing portion 136 is tightly fixed to the inner peripheral surface of the housing 110. Thus, the frame 130 is fixedly connected to the housing 110.

[0081] The main bearing portion 132 protrudes downward from the bottom surface of the center portion of the main flange portion 131 toward the drive motor 120. A cylindrical bearing bore 132a extends axially through the main bearing portion 132. The rotating shaft 125 is inserted into the inner circumferential surface of the bearing bore 132a and is supported radially.

[0082] The swivel space 133 is recessed from the center of the main flange 131 toward the main bearing 132 with a predetermined depth and outer diameter. The swivel space 133 is formed to be larger than the outer diameter of the rotating shaft coupling portion 143 provided on the swivel scroll disk 140, which will be described later. As a result, the rotating shaft coupling portion 143 can be accommodated inside the swivel space 133 in a swivelable manner.

[0083] The scroll plate support portion 134 is formed in a ring shape on the top surface of the main flange portion 131 along the periphery of the swirling space portion 133. As a result, the bottom surface of the swirling end plate portion 141, which will be described later, can be axially supported by the scroll plate support portion 134.

[0084] The cross ring support portion 135 is formed in a ring shape on the top surface of the main flange portion 131 along the outer peripheral surface of the scroll plate support portion 134. Thus, the cross ring 180 can be inserted into and rotatably accommodated in the cross ring support portion 135.

[0085] The frame fixing portion 136 extends radially around the periphery of the cross-ring support portion 135. The frame fixing portion 136 extends in a ring shape, or extends as a plurality of protrusions spaced apart from each other in a predetermined interval along the circumferential direction. This embodiment shows an example in which the frame fixing portion 136 is formed as a plurality of protrusions in the circumferential direction.

[0086] Reference Figure 1 In this embodiment, the swirling scroll disk 140 is integrated with the rotating shaft 125 and positioned between the main frame 130 and the non-swirling scroll disk 150. A cross ring 180, serving as an anti-rotation mechanism, is provided between the main frame 130 and the swirling scroll disk 140. Thus, the rotational motion of the swirling scroll disk 140 is constrained, and it will swirle relative to the non-swirling scroll disk 150.

[0087] Specifically, the swirling vortex disk 140 includes: a swirling end plate portion 141, a swirling vortex portion 142, and a rotating shaft connection portion 143.

[0088] The swivel end plate portion 141 is formed in a generally circular plate shape. The outer diameter of the swivel end plate portion 141 is placed in the scroll plate support portion 134 of the frame 130 and is supported axially. Thus, the swivel end plate portion 141 and the scroll plate support portion 134 facing it form an axial bearing surface (not indicated in the drawings).

[0089] The swirling scroll portion 142 protrudes from the top surface of the swirling end plate portion 141, which faces the non-swirling scroll disk 150, by a predetermined height and is formed in a spiral shape. The swirling scroll portion 142 is formed correspondingly to the non-swirling scroll portion 152 of the non-swirling scroll disk 150, which will be described later, so as to engage with the non-swirling scroll portion 152 to perform a swirling motion. Thus, the swirling scroll portion 142 and the non-swirling scroll portion 152 together form the compression chamber V.

[0090] Based on the vortex section 142, the compression chamber V is composed of a first compression chamber V1 and a second compression chamber V2. The first compression chamber V1 and the second compression chamber V2 are formed consecutively as an intake pressure chamber (not labeled), an intermediate pressure chamber (not labeled), and an exhaust pressure chamber (not labeled). Hereinafter, the compression chamber formed between the outer surface of the vortex section 142 and the inner surface of the non-vortex section 152 facing it will be defined as the first compression chamber V1, and the compression chamber formed between the inner surface of the vortex section 142 and the outer surface of the non-vortex section 152 facing it will be defined as the second compression chamber V2 and will be explained.

[0091] The rotating shaft joint 143 protrudes from the bottom surface of the swivel end plate 141 toward the main frame 130. The rotating shaft joint 143 is formed in a cylindrical shape, into which a swivel bearing (not shown) made of bushing bearing can be pressed.

[0092] Reference Figure 1 In this embodiment, the non-rotating scroll disk 150 is disposed on the upper part of the main frame 130, separated from the rotating scroll disk 140. The non-rotating scroll disk 150 can be fixedly attached to the main frame 130, or it can be attached in a manner that allows it to move in the vertical direction. In this embodiment, an example is shown where the non-rotating scroll disk 150 is attached to the main frame 130 in a manner that allows it to move axially.

[0093] The non-rotating scroll disk 150 of this embodiment includes: a non-rotating end plate portion 151, a non-rotating scroll portion 152, a non-rotating side wall portion 153, and a guide protrusion 154.

[0094] The non-rotating end plate portion 151 is formed in the shape of a circular plate and is arranged laterally in the low-pressure portion 110a of the housing 110. In the non-rotating end plate portion 151, a plurality of back pressure fastening grooves 151b are formed along the edge. As a result, the fastening bolts 177 of the back pressure fastening holes 1611a of the back pressure plate 161 (described later) can be fastened to the back pressure fastening grooves 151b of the non-rotating end plate portion 151, so that the back pressure plate 161 can be bolted to the back surface (top surface) 151a of the non-rotating end plate portion 151.

[0095] The discharge port 1511, the bypass hole 1512, and the first back pressure hole 1513 are formed to penetrate the central portion of the non-rotational end plate portion 151 axially. The discharge port 1511 may be formed at the center of the non-rotational end plate portion 151, the bypass hole 1512 may be formed on the outer side further upstream than the discharge port 1511, and the first back pressure hole 1513 may be formed on the outer side further upstream than the bypass hole 1512.

[0096] The discharge port 1511 is formed at a position where the discharge pressure chamber (not labeled) of the first compression chamber V1 and the discharge pressure chamber (not labeled) of the second compression chamber V2 communicate with each other. Thus, the refrigerant compressed in the first compression chamber V1 and the refrigerant compressed in the second compression chamber V2 can be combined in the discharge pressure chamber and discharged through the discharge port 1511 into the high-pressure section 110b, which serves as the discharge space.

[0097] The bypass hole 1512 includes a first bypass hole 1512a and a second bypass hole 1512b. The first bypass hole 1512a and the second bypass hole 1512b can each be formed as a single hole, or they can each be formed as a plurality of holes. This embodiment shows an example where the first bypass hole 1512a and the second bypass hole 1512b are formed as a plurality of holes. Therefore, it is possible to form holes smaller than the thickness of the spiral portion 142, while also increasing the overall area of ​​the bypass hole 1512.

[0098] The first bypass hole 1512a communicates with the first compression chamber V1, and the second bypass hole 1512b communicates with the second compression chamber V2. The first bypass hole 1512a and the second bypass hole 1512b are respectively formed on both sides of the discharge port 1511 along the circumferential direction, with the discharge port 1511 as the center; in other words, they are respectively formed at positions closer to the suction side than the discharge port 1511. Therefore, in the event that the refrigerant compressed in each compression chamber V1 and V2 is overcompressed, bypassing the refrigerant before it reaches the discharge port 1511 can suppress overcompression.

[0099] The first bypass hole 1512a and the second bypass hole 1512b are accommodated in the valve receiving groove 155, which will be described later. In other words, a valve receiving groove 155 with a predetermined recess is formed on the back surface 151a of the non-rotating end plate portion 151, and the first bypass hole 1512a and the second bypass hole 1512b are formed together with the discharge port 1511 inside the valve receiving groove 155. As a result, the length L2 of each of the first bypass hole 1512a and the second bypass hole 1512b will be shortened by the amount by which the thickness H1 of the non-rotating end plate portion 151 is subtracted from the depth D1 of the valve receiving groove 155, thereby reducing the dead volume in the first bypass hole 1512a and the second bypass hole 1512b. The valve receiving groove 155 will be described again later with the valve guide 171.

[0100] The first back pressure hole 1513 is formed by penetrating the non-rotating end plate portion 151 along the axial direction and communicating with the compression chamber V, which has an intermediate pressure between the suction pressure and the discharge pressure. The first back pressure hole 1513 may be formed only once and communicate with either the first compression chamber V1 or the second compression chamber V2, or multiple holes may be provided and communicate with the two compression chambers V1 and V2 respectively.

[0101] The non-rotating vortex portion 152 extends axially from the bottom surface of the non-rotating end plate portion 151. The non-rotating vortex portion 152 is formed in a spiral shape inside the non-rotating side wall portion 153, and can be formed correspondingly to the rotating vortex portion 142 in a manner that engages with it.

[0102] The non-rotating sidewall portion 153 extends axially from the bottom edge of the non-rotating endplate portion 151 and is formed in a ring shape, surrounding the non-rotating scroll portion 152. A radially penetrating intake port 1531 is formed on one side of the outer peripheral surface of the non-rotating sidewall portion 153. As a result, the first compression chamber V1 and the second compression chamber V2 are formed such that their volumes decrease from the periphery to the center, thereby compressing the intake refrigerant.

[0103] The guide protrusion 154 can extend radially from the lower outer peripheral surface of the non-rotating sidewall portion 153. The guide protrusion 154 can be formed into a ring, or a plurality of them can be formed at predetermined intervals along the circumferential direction. This embodiment will be described with an example of a plurality of guide protrusions 154 being formed at predetermined intervals along the circumferential direction.

[0104] Reference Figure 1 In this embodiment, the back pressure chamber assembly 160 is disposed on the upper side of the non-rotating scroll plate 150. Therefore, the back pressure of the back pressure chamber 160a (more precisely, the force acting on the back pressure chamber) acts on the non-rotating scroll plate 150. In other words, the non-rotating scroll plate 150 bears pressure in the direction towards the rotating scroll plate 140 due to the back pressure, thereby sealing the compression chambers V1 and V2 on both sides.

[0105] Specifically, the back pressure chamber assembly 160 includes a back pressure plate 161 and a floating plate 165. The back pressure plate 161 is attached to the top surface of the non-rotating end plate portion 151. The floating plate 165 is slidably attached to the back pressure plate 161, thereby forming a back pressure chamber 160a together with the back pressure plate 161.

[0106] The back pressure plate 161 includes: a fixing plate portion 1611, a first annular wall portion 1612, and a second annular wall portion 1613.

[0107] The fixing plate 1611 is formed into a hollow annular plate shape. A plurality of back pressure fastening holes 1611a are formed along the edge of the fixing plate 1611. Thus, the fixing plate 1611 is bolted to the non-rotating vortex disk 150 by fastening bolts 177 passing through the back pressure fastening holes 1611a.

[0108] In the fixed plate portion 1611, a plate-side back pressure hole (hereinafter referred to as the second back pressure hole) 1611b extends axially. The second back pressure hole 1611b communicates with the compression chamber V through the first back pressure hole 1513. Thus, the second back pressure hole 1611b and the first back pressure hole 1513 together connect the compression chamber V and the back pressure chamber 160a.

[0109] On the bottom surface of the fixed plate portion 1611, i.e., the back surface 161a of the back pressure plate 161 facing the back surface 151a of the non-rotating end plate portion 151, a discharge guide groove 1611c, described later, can be formed. The discharge guide groove 1611c can be formed in an annular shape to surround the intermediate discharge port 1612a, described later, and successively connected intermediate discharge ports 1612a can be formed on the inner circumference of the discharge guide groove 1611c. As a result, the refrigerant flowing into the discharge guide groove 1611c can move rapidly towards the high pressure section 110b through the intermediate discharge port 1612a. The discharge guide groove 1611c will be described again later along with the valve assembly 170.

[0110] The first annular wall portion 1612 and the second annular wall portion 1613 surround the inner and outer peripheral surfaces of the fixed plate portion 1611 on the top surface of the fixed plate portion 1611. Thus, the outer peripheral surface of the first annular wall portion 1612, the inner peripheral surface of the second annular wall portion 1613, the top surface of the fixed plate portion 1611, and the bottom surface of the floating plate 165 will form an annular back pressure chamber 160a.

[0111] An intermediate discharge port 1612a communicating with the discharge port 1511 of the non-rotating scroll plate 150 is formed in the first annular wall portion 1612. A valve guide groove 1612b is formed on the inner side of the intermediate discharge port 1612a for the discharge valve 1751 to slide into. An anti-backflow hole 1612c is formed in the center of the valve guide groove 1612b. Thus, the discharge valve 1751 prevents the discharged refrigerant from flowing back into the compression chambers V1 and V2 by selectively opening and closing the space between the discharge port 1511 and the intermediate discharge port 1612a.

[0112] The floating plate 165 is formed in an annular shape. The floating plate 165 can be made of a material lighter than the back pressure plate 161. Thus, the floating plate 165 moves axially relative to the back pressure plate 161 according to the pressure in the back pressure chamber 160a, and is attached to and detached from the lower side of the high-low pressure separation plate 115. For example, when the floating plate 165 is in contact with the high-low pressure separation plate 115, the floating plate 165 functions to seal the refrigerant so that the discharged refrigerant is discharged to the high-pressure section 110b without leaking into the low-pressure section 110a.

[0113] Reference Figure 1 and Figure 2 In this embodiment, the valve assembly 170 is disposed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The valve assembly 170 can be fastened to either the non-rotating scroll plate 150 or the back pressure chamber assembly 160. Alternatively, the valve assembly 170 can be pressed and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160 without being fastened to either. In this embodiment, an example where the valve assembly 170 is fastened to the back pressure chamber assembly 160 and disposed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160 will be described first.

[0114] Additionally, the valve assembly 170 is inserted into the valve receiving groove 155 fixed to the aforementioned non-rotating end plate portion 151. In other words, the valve receiving groove 155 is not included in the valve assembly 170; however, since the valve receiving groove 155 is the portion into which the valve assembly 170 is inserted, it can be broadly considered to be included in the valve assembly 170. Therefore, the valve receiving groove 155 and the valve assembly 170 will be described separately below, but any part related to the valve assembly 170 can also be described as part of the valve assembly 170.

[0115] Figure 3 It is Figure 2 A perspective view showing the valve assembly assembled into the back pressure chamber assembly. Figure 4 It is Figure 3 The back pressure chamber assembly is assembled onto the non-rotating vortex disk, and a cross-sectional view is shown. Figure 5 yes Figure 4 Sectional view along line "IX-IX", Figure 6 It is Figure 2 An enlarged perspective view of the valve guide and bypass valve.

[0116] Reference Figure 3 and Figure 4 In this embodiment, the valve receiving groove 155 is formed by recessing a predetermined depth into the back surface 151a of the non-rotating end plate portion 151. For example, the valve receiving groove 155 is composed of a valve mounting surface 1551 forming the bottom surface and a guide receiving surface 1552 forming the side wall surface and surrounding the valve mounting surface 1551. In other words, although the valve mounting surface 1551 in this embodiment constitutes the valve receiving groove 155, it is separated from the first axial side surface 171a of the valve guide 171 by a predetermined interval and forms part of the discharge guide channel 170a. As a result, the refrigerant passing through the discharge port 1511 and the bypass holes 1512a, 1512b will move towards the intermediate discharge port 1612a through the discharge guide channel 170a formed by the interval between the valve mounting surface 1551 and the valve guide 171.

[0117] The valve mounting surface 1551 is formed flat, and the aforementioned discharge port 1511 and bypass holes 1512a and 1512b are respectively formed on the valve mounting surface 1551. In other words, the discharge port 1511 and bypass holes 1512a and 1512b are formed axially through the valve mounting surface 1551. Thus, the discharge port 1511 and bypass holes 1512a and 1512b are formed inside the valve receiving groove 155.

[0118] When the discharge port 1511 and bypass holes 1512a and 1512b are formed inside the valve receiving groove 155, such as Figure 7 As shown, the length L1 of the discharge port 1511 and the length L2 of the bypass holes 1512a and 1512b will be shortened. Therefore, depending on the shape of the discharge valve 1751 and / or the bypass valve 1755, the dead volume in the discharge port 1511 and / or the bypass holes 1512a and 1512b can be reduced. For example, when the bypass valve 1755 is a piston valve that is attached to and opened / closed on the valve mounting surface 1552 constituting the top surface of the bypass holes 1512a and 1512b, the shortening of the length of the bypass holes 1512a and 1512b reduces their volume, thereby reducing the dead volume. The same applies when the bypass valve 1755 is formed as a reed valve.

[0119] like Figure 5As shown, the guide receiving surface 1552 can be formed at a position that does not overlap with the back pressure fastening groove 151b. In other words, a plurality of back pressure fastening grooves 151b for fastening the back pressure plate 161 to the non-rotating scroll plate 150 can be formed on the back surface 151a of the non-rotating end plate portion 151, and the guide receiving surface 1552 constituting the inner circumferential surface of the valve receiving groove portion 155 can be formed inside a first virtual circle C1 that connects the center of the back pressure fastening grooves 151b in the circumferential direction. Thus, the back pressure fastening grooves 151b are located outside the valve receiving groove portion 155, so even if the thickness of the non-rotating end plate portion 151 in the valve receiving groove portion 155 becomes thinner, the back pressure fastening grooves 151b can be formed deeper. This ensures the fastening strength of the fastening bolt 177.

[0120] However, a portion of the valve receiving groove 155, for example, the guide fixing protrusion 173 for fastening the bypass valve 1755 described later, can also be formed outside the first virtual circle C1, and can be formed to be located between the back pressure fastening grooves 151b in the circumferential direction. This allows the guide fixing protrusion 173 to be formed longer, thereby improving the assembly stability of the valve guide 171.

[0121] Reference Figure 4 The height of the guide receiving surface 1552, i.e., the depth D1 of the valve receiving groove 155, which is defined as the distance from the back surface 151a of the non-rotating end plate portion 151 to the valve mounting surface 1551, is greater than the thickness H2 of the valve guide 171, which is defined as the distance between the two axial sides 171a and 171b of the valve guide 171 described later. Therefore, when the second axial side 171b of the valve guide 171 described later is configured to have the same height as the back surface 151a of the non-rotating end plate portion 151, a predetermined interval will be separated between the first axial side 171a of the valve guide 171 and the valve mounting surface 1551 to form a portion of the ejection guide channel 170a, i.e., the first ejection guide channel 170b.

[0122] The cross-sectional area of ​​the valve receiving groove 155 is larger than the cross-sectional area of ​​the valve guide 171; specifically, it is larger than the cross-sectional area of ​​the guide body 172 of the valve guide 171 that is inserted into the valve receiving groove 155. For example, as... Figure 3 and Figure 5 As shown, the guide receiving surface 1552 constituting the inner peripheral surface of the valve receiving groove 155 can be formed as a circle, and the outer peripheral surface of the valve guide 171 (described later) can be formed as an ellipse. In this case, the inner diameter of the guide receiving surface 1552 can be larger than the minor axis length of the valve guide 171. Thus, the inner peripheral surface of the guide receiving surface 1552 is separated from the outer peripheral surface of the valve guide 171 to form another part of the discharge guide channel 170a, namely the second discharge guide channel 170c.

[0123] Reference Figures 3 to 5 A guide insertion groove 1553 is formed on a portion of the guide receiving surface 1552. For example, the guide insertion groove 1553 is formed by recessing into both sides of the guide receiving surface 1552 with the outlet 1511 as the center. Specifically, it is formed by recessing into the outer side of the guide receiving surface 1552 along an imaginary line passing through the outlet 1511 and connecting the center of the first bypass hole 1512a and the center of the second bypass hole 1512b. The two guide insertion grooves 1553 are formed symmetrically with the outlet 1511 as the center. Thus, the guide insertion groove 1553 can extend from the inner peripheral surface of the valve receiving groove 155 and form on the outside of the valve receiving groove 155.

[0124] The guide insertion groove 1553 may be shallower than or the same as the valve receiving groove 155. For example, the depth D2 of the guide insertion groove 1553 may be less than or equal to the depth D1 of the valve receiving groove 155. Thus, even if the heads 1771a and 1772a of the fastening members 1771 and 1772, which are fastened from the first axial side 171a to the second axial side 171b of the valve guide 171, are in contact with the bottom surface of the guide insertion groove 1553, the heads 1771a and 1772a of the fastening members 1771 and 1772a can separate the valve guide 171 from the valve mounting surface 1551 to form the aforementioned first ejection guide channel 170b.

[0125] Reference Figure 4 and Figure 6 The valve assembly 170 of this embodiment includes a valve guide 171 and a valve member 175. The valve guide 171 is inserted into and fixed to a valve receiving groove 155 provided in a non-rotating end plate portion 151. The valve member 175 is slidably inserted into the valve guide 171 and disposed between the non-rotating end plate portion 151 and the back pressure plate 161. Thus, the valve guide 171 and the valve member 175 are modularized into the valve assembly 170, thereby simplifying the assembly of the valve member 175, i.e., the bypass valve 1755.

[0126] Alternatively, the valve guide 171 can be fastened to the back pressure chamber assembly 160, or it can be fastened to the non-rotating scroll plate 150. However, the valve guide 171 can also be pressed and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. This embodiment shows an example where the valve guide 171 is pressed and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160.

[0127] Reference Figures 4 to 6The valve guide 171 of this embodiment includes a guide body portion 172 and a guide fixing protrusion 173. The guide body portion 172 and the guide fixing protrusion 173 are formed to have the same thickness, and the guide body portion 172 is located inside the valve receiving groove portion 155, while the guide fixing protrusion 173 is located outside the valve receiving groove portion 155.

[0128] The guide body 172 is inserted into the valve receiving groove 155. When projected axially, the cross-sectional area of ​​the guide body 172 is smaller than the cross-sectional area of ​​the valve receiving groove 155. Therefore, the outer peripheral surface of the guide body 172 is separated from the inner peripheral surface of the valve receiving groove 155, thereby forming the aforementioned second discharge guide channel 170c between the inner peripheral surface of the valve receiving groove 155 and the outer peripheral surface of the guide body 172. Thus, even if the guide body 172 is located between the bypass holes (and discharge ports) 1512a, 1512b and the intermediate discharge port 1612a, the refrigerant passing through the bypass holes (and discharge ports) 1512a, 1512b can be smoothly discharged to the intermediate discharge port 1612a via the second discharge guide channel 170c.

[0129] For example, the guide body 172 is formed in an elliptical shape, and the minor axis of the guide body 172 is less than the inner diameter of the valve receiving groove 155, which is formed in a circle. As a result, the aforementioned second discharge guide channel 170c can be formed between the outer peripheral surface of the guide body 172 and the inner peripheral surface of the valve receiving groove 155.

[0130] Although not shown in the figure, the guide body 172 can also be formed as a circle with the same center as the valve receiving groove 155, and the outer diameter of the guide body 172 can be formed smaller than the inner diameter of the valve receiving groove 155 to form the aforementioned second discharge guide channel 170c. This allows for both a smaller inner diameter of the valve receiving groove 155 and a longer bypass valve guide hole 1722 (described later). Consequently, the guide fixing protrusion 173 can be formed with a long length, thereby enabling stable fastening of the valve guide 171, or even without additional fastening components, the valve guide 171 can be stably fixed by pressing it between the non-rotating scroll plate 150 and the back pressure chamber assembly 160.

[0131] Additionally, although not shown in the figure, the guide body 172 may also be formed as a circle with the same center as the valve receiving groove 155, and the outer diameter of the guide body 172 may be the same as the inner diameter of the valve receiving groove 155. In this case, a second discharge guide channel 170c may be formed on the outer peripheral surface of the guide body 172 and / or the inner peripheral surface of the valve receiving groove 155.

[0132] A discharge valve guide hole 1721 is formed at the center of the guide body 172. The discharge valve guide hole 1721 is formed in a shape corresponding to that of the discharge valve 1751. For example, if the outer peripheral surface of the discharge valve 1751 is circular, the discharge valve guide hole 1721 is also circular. As a result, the discharge valve 1751, which is inserted into the discharge valve guide hole 1721, opens and closes the discharge outlet 1511 while sliding axially along the discharge valve guide hole 1721.

[0133] Bypass valve guide holes 1722 are formed on both sides of the guide body 172. The two bypass valve guide holes 1722 are formed at a predetermined interval on both sides of the discharge valve guide hole 1721.

[0134] The bypass valve guide hole 1722 can be formed in a shape corresponding to that of the bypass valve 1755, in other words, the shapes of the bypass holes 1512a and 1512b. For example, if the bypass holes 1512a and 1512b communicating with one side of the compression chambers V1 and V2 are divided into a plurality of holes and formed continuously, the bypass valve 1755 can be formed in an arc shape when projected axially. In this case, the bypass valve guide hole 1722 can also be formed in an arc cross-sectional shape so that the bypass valve 1755 can be inserted in a sliding manner.

[0135] The guide fixing protrusion 173 extends from both ends of the guide body portion 172. For example, the guide fixing protrusion 173 can extend from both ends of the guide body portion 172, which is formed in an elliptical shape, along the long axis direction. Thus, the guide fixing protrusion 173 can extend to the outside of the valve receiving groove portion 155, so that the first axial side surface 172a of the guide body portion 172 can be supported by the guide fixing protrusion 173 and separated from the valve mounting surface 1551 of the valve receiving groove portion 155.

[0136] Reference Figures 4 to 6 The guide fixing protrusion 173 and the guide fixing groove 1553 are formed to have approximately the same shape in the axial direction. Thus, the guide fixing protrusions 173 on both sides can be inserted into the guide fixing grooves 1553 on both sides in the axial direction and supported.

[0137] A guide fastening hole 1731 is formed axially through the guide fixing protrusion 173. The guide fastening hole 1731 is formed corresponding to the guide fastening groove 1611d provided on the back surface 161a of the back pressure plate 161. In other words, the guide fastening hole 1731 can be formed to be located on the same axis as the guide fastening groove 1611d. Thus, the valve guide 171 can be fastened to the back pressure plate 161 by a plurality of fastening members 1771, 1772 that are fastened to the guide fixing groove 1553 of the back pressure plate 161 through the guide fastening hole 1731 of the valve guide 171.

[0138] The guide fixing protrusion 173 can be directly abutted against the back pressure plate 161, or it can be spaced apart from it by a predetermined interval. For example, the second axial side surface 173b of the guide fixing protrusion 173 can be formed flat at the same height as the second axial side surface 172b of the guide body portion 172, so that the second axial side surface 173b of the guide fixing protrusion 173 is in close contact with the back surface 161a of the back pressure plate 161. Alternatively, a guide separating protrusion 1732 can be formed on the second axial side surface 173b of the guide fixing protrusion 173, so that the second axial side surface 173b of the guide fixing protrusion 173 is separated from the back surface 161a of the back pressure plate 161 by an amount corresponding to the height of the guide separating protrusion 1732. This embodiment shows an example in which the guide separating protrusion 1732 is formed on the second axial side surface 173b of the guide fixing protrusion 173. Therefore, the discharge guide groove 1611c, which will be described later, is formed relatively shallowly on the back side 161a of the back pressure plate 161, causing the valve guide groove 1612b to extend long enough to stably support the discharge valve 1751. It will be described again later along with the discharge guide groove 1611c.

[0139] like Figure 5 and Figure 6 As shown, the guide separating protrusion 1732 can be formed in a circular shape. For example, the guide separating protrusion 1732 can extend from the second axial side surface 173b of the guide fixing protrusion 173 towards the back surface 161a of the back pressure plate 161, and the guide fastening hole 1731 can be formed axially through the guide separating protrusion 1732. Thus, the guide separating protrusion 1732 can be formed in a circular shape to surround the guide fastening hole 1731. Thus, the end surface of the guide separating protrusion 1732 is formed higher than the second axial side surface 172b of the guide body portion 172, thereby forming an ejection guide channel (third ejection guide channel) 170d between the second axial side surface 172b of the guide body portion 172 and the back surface 161a of the back pressure plate 161 facing the second axial side surface 172b.

[0140] Although not shown in the figure, the guide spacer protrusion 1732 may also be formed in an arc shape. In this case, the guide spacer protrusion 1732 may be formed to only surround a portion of the guide fastening hole 1731.

[0141] Reference Figure 4The height H3 of the guide separating protrusion 1732 can be less than the thickness of the guide fixing protrusion 173. In other words, it can be less than or equal to the distance G1 between the valve mounting surface 1551 (which is the bottom surface of the valve receiving groove 155) and the first axial side surface 172a of the guide body 172 facing the valve mounting surface 1551. This ensures that the opening width of the first ejection guide channel 170b, defined as the distance G1 between the valve mounting surface 1551 and the first axial side surface 172a of the guide body 172, is sufficiently guaranteed. If, under the condition that the depth D1 of the valve receiving groove 155 is the same, the height H3 of the guide separating protrusion 1732 is too high, the guide body 172 will correspondingly approach the valve mounting surface 1551, thus failing to sufficiently guarantee the opening width of the first ejection guide channel 170b. However, as described in this embodiment, when the height H3 of the guide separating the protrusion 1732 is smaller (shallower) than the thickness of the guide fixing protrusion 173, i.e. the thickness H2 of the valve guide 171, it is possible to ensure both the opening width of the aforementioned third discharge guide channel 170d and the opening area of ​​the first discharge guide channel 170b.

[0142] Furthermore, since the height H3 of the guide member separating protrusion 1732 is less than the thickness H22 of the guide member fixing protrusion 173, in the maximum open position of the bypass valve 1755, the opening and closing surface (opening and closing portion) of the bypass valve 1755 is located at the same height as the first axial side surface 172a of the guide member body 172, or at a lower position than the first axial side surface 172a. Therefore, in the maximum open position of the bypass valve 1755, the bypass valve 1755 can also be stably supported by the bypass valve guide hole 1722.

[0143] On the other hand, refer to Figure 3 and Figure 4 The aforementioned discharge guide groove 1611c can be formed on the back side 161a of the back pressure plate 161. The depth D3 of the discharge guide groove 1611c can be greater than or equal to the thickness of the first stop portion 1756c and the second stop portion 1757c, which will be described later. This ensures both the maximum thickness of the valve guide 171 and the maximum opening / closing height of the bypass valve 1755.

[0144] The discharge guide groove 1611c can be formed in an annular shape and communicate with the intermediate discharge port 1612a. In other words, the intermediate discharge port 1612a can be continuously formed on the inner circumferential side of the discharge guide groove 1611c. As a result, the refrigerant flowing into the discharge guide groove 1611c will move rapidly toward the intermediate discharge port 1612a.

[0145] Furthermore, when projected axially, the discharge guide groove 1611c can be larger than the outer peripheral surface of the guide body 172. In other words, the outer peripheral surface of the discharge guide groove 1611c can be approximately the same as the inner diameter of the guide receiving surface 1552 that constitutes the inner peripheral surface of the valve receiving groove 155. Thus, the discharge guide groove 1611c is located outside the guide body 172, thereby keeping the intermediate discharge port 1612a in constant communication with the second discharge guide channel 170c through the discharge guide groove 1611c.

[0146] On the other hand, refer to Figures 2 to 6 In this embodiment, the valve component 175 includes a discharge valve 1751 and a bypass valve 1755. Both the discharge valve 1751 and the bypass valve 1755 can be piston valves. However, this is not a limitation. In other words, the bypass valve 1755 can be a piston valve, and the discharge valve 1751 can be a reed valve. It should be noted that, in this embodiment, as described above, the explanation focuses on an example where both the discharge valve 1751 and the bypass valve 1755 are piston valves.

[0147] The discharge valve 1751 is slidably inserted axially into the valve guide groove 1612a of the back pressure plate 161 and the discharge valve guide hole 1721 of the valve guide 171 to open and close the aforementioned discharge outlet 1511. Thus, the discharge valve 1751 is always housed within the valve receiving groove 155. For example, when the discharge valve 1751 is closed or open, its lower end remains inserted into the discharge valve guide hole 1721, therefore the discharge valve 1751 will always be located inside the valve receiving groove 155.

[0148] Reference Figure 2 The discharge valve 1751 can be formed in the shape of a rod or a cylinder. In other words, the discharge valve 1751 can be formed in the shape of a solid round rod, or it can be formed in the shape of a hollow cylinder. In this embodiment, the discharge valve 1751 can be formed in the shape of a semi-circular rod or a semi-cylindrical tube with its upper end blocked and its lower end open. Thus, the discharge valve 1751 of this embodiment can reduce weight while preventing oil in the high-pressure part 110b, which serves as the discharge space, from depositing inside the discharge valve 1751.

[0149] A valve support portion 1751a may be formed on the outer peripheral surface of the discharge valve 1751. For example, the valve support portion 1751a may be formed in the middle of the outer peripheral surface of the discharge valve 1751, and the outer diameter of the opening and closing surface 1751b side of the discharge valve 1751 may be formed with a smaller outer diameter, while the outer diameter of the opposite side may be formed with a larger outer diameter.

[0150] The valve support portion 1751a can be formed in a stepped shape, and the outer diameter of the valve support portion 1751a can be larger than the inner diameter of the discharge valve guide hole 1721 provided on the valve guide 171. Thus, the valve support portion 1751a of the discharge valve 1751 is engaged with the second axial side surface 171b of the valve guide 171, thereby suppressing the axial movement of the discharge valve 1751 toward the non-rotating scroll plate 150. Therefore, the discharge valve 1751 can be modularly assembled with the first bypass valve 1756 and the second bypass valve 1757 (described later) and integrated into the back pressure chamber assembly 160 using the valve guide 171.

[0151] Although not shown in the figure, the discharge valve 1751 can also be formed as a semi-circular rod or semi-cylindrical shape with an opening at its upper end and a closed lower end. In this case, the discharge valve 1751 can be lighter, and the dead volume can be reduced because the opening and closing surface 1751b of the discharge valve 1751 is close to the discharge port 1511. However, in this case, an oil drain hole (not shown) can be formed around the opening and closing surface 1751b of the discharge valve 1751, penetrating between the inner and outer peripheral surfaces of the discharge valve 1751, thereby preventing oil from depositing into the interior of the discharge valve 1751.

[0152] Reference Figure 4 and Figure 6 The bypass valve 1755 is slidably inserted axially into the bypass valve guide hole 1722 of the valve guide 171 to open and close the aforementioned bypass hole 1511. Thus, the bypass valve 1755, like the discharge valve 1751, is always housed within the valve receiving groove 155. For example, when the bypass valve 1755 is closed and open, its lower end remains inserted into the bypass valve guide hole 1722, therefore the bypass valve 1755 will always be located inside the valve receiving groove 155.

[0153] The bypass valve 1755 includes a first bypass valve 1756 and a second bypass valve 1757. In other words, the first bypass port 1512a can be opened and closed by the first bypass valve 1756, and the second bypass port 1512b can be opened and closed by the second bypass valve 1757.

[0154] The first bypass valve 1756 includes a first guide portion 1756a, a first opening / closing portion 1756b, and a first stop portion 1756c. The first guide portion 1756a guides the axial movement of the first bypass valve 1756, the first opening / closing portion 1756b opens and closes the first bypass orifice 1512a, and the first stop portion 1756c restricts the axial movement of the first bypass valve 1756. Thus, the first bypass valve 1756 forms a piston valve. The second bypass valve 1757 is similarly configured.

[0155] The first guide portion 1756a is formed with the same cross-sectional shape as the first bypass valve guide hole 1722 in the axial direction. In other words, the first guide portion 1756a is formed with an arc-shaped cross-section and is slidably inserted into the first bypass valve guide hole 1722. Thus, the first bypass valve 1755 can be stably supported in the first bypass guide hole 1722 by means of the first guide portion 1756a.

[0156] The first opening / closing portion 1756b can be formed at one end of the first guide portion 1756a, and can be formed with the same cross-sectional shape as the first guide portion 1756a. In other words, the first opening / closing portion 1756b is formed as an arcuate cross-sectional shape extending long along the first bypass hole 1512a at the end of the first guide portion 1756a facing the valve mounting surface 1551 of the non-rotating end plate portion 151. Thus, the first opening / closing portion 1756b can extend from the first guide portion 1756a with the same shape, thereby making it easy to form the first guide portion 1756a and the first opening / closing portion 1756b.

[0157] Although not shown in the figure, the width of the first opening / closing portion 1756b can be configured to allow the first bypass hole 1512a to be opened and closed, while the area of ​​the first guide portion 1756a can be smaller than that of the first opening / closing portion 1756b. In this case, as mentioned above, the actual dead volume can be reduced by shortening the length of the first bypass hole 1512a, and the responsiveness of the valve can be improved by reducing the weight of the first guide portion 1756a.

[0158] The first stop portion 1756c can be formed at the other end of the first guide portion 1756a, opposite to the first opening / closing portion 1756b, via the valve guide 171. In other words, the first stop portion 1756c can be formed at the other end of the first guide portion 1756a, opposite to the discharge guide groove 1611c of the back pressure plate 161.

[0159] The first stop portion 1756c can be larger than the first guide portion 1756a. For example, the cross-sectional area of ​​the first stop portion 1756c can be laterally extended to be larger than the cross-sectional area of ​​the first guide portion 1756a and the cross-sectional area of ​​the first bypass valve guide hole 1722a. Thus, the first stop portion 1756c engages with the valve guide 171, thereby restricting the movement of the first bypass valve 1756 toward the non-rotating scroll plate 150. Therefore, the first bypass valve 1756 can be modularly integrated with the second bypass valve 1757 and the discharge valve 1751 (described later) and combined with the valve guide 171 into the back pressure chamber assembly 160.

[0160] The thickness of the first stop portion 1756c can be formed to be approximately the same as the axial height of the aforementioned guide-separating protrusion 1732. Thus, even without forming the discharge guide groove 1611c too deep in the back pressure plate 161, the first bypass valve 1756 can be fully opened.

[0161] The second bypass valve 1757 is formed symmetrically with respect to the first bypass valve 1756, centered on the discharge valve 1751. For example, the second bypass valve 1757 includes a second guide portion 1757a, a second opening / closing portion 1757b, and a second stop portion 1757c. The second guide portion 1757a guides the axial movement of the second bypass valve 1757, the second opening / closing portion 1757b opens and closes the second bypass orifice 1512b, and the second stop portion 1757c restricts the axial movement of the second bypass valve 1757. Thus, the second bypass valve 1757, like the first bypass valve 1756, forms a piston valve. Therefore, the description of the first bypass valve 1756 will be used instead of the description of the second bypass valve 1757.

[0162] The undescribed reference numeral 1752 in the attached figure is an elastic member supporting the discharge valve.

[0163] The scroll compressor according to this embodiment, as described above, operates in the following manner.

[0164] That is, if power is applied to the drive motor 120 to generate rotational force, the eccentrically coupled rotary scroll 140, connected to the rotating shaft 125, rotates relative to the non-rotating scroll 150 due to the cross ring 180. At this time, a first compression chamber V1 and a second compression chamber V2 that move continuously are formed between the rotary scroll 140 and the non-rotating scroll 150. During the rotational motion of the rotary scroll 140, the first compression chamber V1 and the second compression chamber V2 move from the intake port (or intake chamber) 1531 to the discharge port (or discharge chamber) 1511 and their volumes gradually decrease.

[0165] Therefore, the refrigerant is drawn into the low-pressure section 110a of the housing 110 through the refrigerant suction pipe 117. A portion of the refrigerant is directly drawn into the respective suction pressure chambers (not marked) that constitute the first compression chamber V1 and the second compression chamber V2 and is compressed, while the remaining refrigerant first moves toward the drive motor 120 and cools the drive motor 120, and then is drawn into the suction pressure chamber (not marked) together with other refrigerants.

[0166] As the refrigerant moves along the path of the first compression chamber V1 and the second compression chamber V2, it is compressed. A portion of the compressed refrigerant moves through the first back pressure hole 1513 and the second back pressure hole 1611b to the back pressure chamber 160a formed by the back pressure plate 161 and the floating plate 165 before reaching the discharge port 1511. Thus, the back pressure chamber 160a will form an intermediate pressure.

[0167] Therefore, the floating plate 165 rises towards the high-low pressure separation plate 115 and comes into close contact with the sealing plate 1151 provided on the high-low pressure separation plate 115. As a result, the high-pressure section 110b of the housing 110 separates from the low-pressure section 110a, thereby preventing the refrigerant discharged from the compression chambers V1 and V2 into the high-pressure section 110b from flowing back into the low-pressure section 110a.

[0168] Conversely, the back pressure plate 161, under the pressure of the back pressure chamber 160a, experiences pressure towards the non-circular scroll plate 150 and descends. This applies pressure towards the circular scroll plate 140 to the non-circular scroll plate 150. Consequently, the non-circular scroll plate 150 adheres tightly to the circular scroll plate 140, thereby preventing refrigerant leakage from the high-pressure side compression chamber (forming the intermediate pressure chamber) to the low-pressure side compression chamber in the two compression chambers V1 and V2.

[0169] Therefore, the refrigerant is compressed to a set pressure as it moves from the intermediate pressure chamber to the discharge pressure chamber, and the refrigerant moves toward the discharge port 1511, applying pressure to the discharge valve 1751 in the opening direction. The discharge valve 1751 is then pushed upwards along the valve guide groove 1612b by the pressure of the discharge pressure chamber, causing the discharge port 1511 to open. The refrigerant in the discharge pressure chamber is then discharged through the discharge port 1511 into the valve receiving groove 155, and the refrigerant is discharged into the high-pressure section 110b through the intermediate discharge port 1612a provided on the back pressure plate 161.

[0170] On the other hand, due to various conditions that occur during the operation of the compressor, the pressure of the refrigerant may rise above the preset pressure. Therefore, a portion of the refrigerant moving from the intermediate pressure chamber to the discharge pressure chamber will bypass the intermediate pressure chamber constituting each compression chamber V1, V2 to the high pressure section 110b through the first bypass hole 1512a and the second bypass hole 1512b before reaching the discharge pressure chamber.

[0171] For example, when the pressure in the first compression chamber V1 and the pressure in the second compression chamber V2 are both greater than a set pressure, the refrigerant compressed in the first compression chamber V1 moves toward the first bypass port 1512a, while the refrigerant compressed in the second compression chamber V2 moves toward the second bypass port 1512b. Thus, the refrigerant moving toward these bypass ports 1512a and 1512b will push upwards, blocking the first opening / closing portion 1756b of the first bypass valve 1756 and the second opening / closing portion 1757b of the second bypass valve 1757. Consequently, the first opening / closing portion 1756b, together with the first guide portion 1756a and the first stop portion 1756c, is axially pushed and moved, and the second opening / closing portion 1757b, together with the second guide portion 1757a and the second stop portion 1757c, is axially pushed and moved, causing the first bypass port 1512a and the second bypass port 1512b to open. At this time, the first stop portion 1756c of the first bypass valve 1756 and the second stop portion 1757c of the second bypass valve 1757 respectively contact the discharge guide groove 1611c of the back pressure plate 161, thereby restricting their opening degree.

[0172] Therefore, the refrigerant in the first compression chamber V1 is discharged into the valve receiving groove 155 through the first bypass hole 1512a, and the refrigerant in the second compression chamber V2 is discharged into the valve receiving groove 155 through the second bypass hole 1512b. This refrigerant, along with the refrigerant discharged through the discharge port 1511, moves towards the central discharge port 1612a of the back pressure plate 161 through the discharge guide channel 170a and discharge guide groove 1611c, which serve as the space between the valve guide 171 and the valve receiving groove 155, and is then discharged into the high-pressure section 110b. Thus, by preventing the refrigerant compressed in the compression chamber V from being overcompressed to a pressure exceeding the set pressure, damage to the swirling scroll section 142 and / or the non-swirling scroll section 152 can be suppressed, while simultaneously improving compressor efficiency.

[0173] Subsequently, when the overcompression in the compression chamber V is eliminated and the pressure returns to an appropriate level, the first bypass valve 1756 and the second bypass valve 1757 are pushed by the pressure from the high-pressure section 110b. Thus, the first bypass valve 1756 moves along the first bypass valve guide hole 1722 toward the valve mounting surface 1551, and the second bypass valve 1757 moves along the second bypass valve guide hole 1722b toward the valve mounting surface 1551. This causes the first opening / closing part 1756b to block the first bypass hole 1512a, and the second opening / closing part 1757b to block the second bypass hole 1512b, and this series of processes is repeated.

[0174] At this point, the high-pressure refrigerant that had not yet been released was trapped in the first bypass hole 1512a and the second bypass hole 1512b. Consequently, the pressure in the compression chamber V rose unnecessarily, causing the first bypass hole 1512a and the second bypass hole 1512b to form a dead volume. Therefore, making the non-rotating end plate portion 151, in which the first bypass hole 1512a and the second bypass hole 1512b are provided, as thin as possible is beneficial for shortening the length of the first bypass hole 1512a and the second bypass hole 1512b, thereby reducing the dead volume.

[0175] However, as described in the prior art, when the bypass valve 1755 is fastened to the non-rotating end plate portion 151, the thickness of the non-rotating end plate portion 151 can be reduced due to the minimum fastening thickness required for fastening the bypass valve 1755. In this embodiment, as described above, the discharge valve 1751 and the bypass valve 1755 are configured as piston valves that can be slidably inserted and are slidably inserted into the valve guide 171 fastened to the back pressure plate 161, thereby enabling the non-rotating end plate portion 151, in which the discharge port 1511 and bypass holes 1512a, 1512b are formed, to be formed as thin as possible. Therefore, the length of the discharge port 1511 and the length of the bypass holes 1512a and 1512b are reduced, thereby minimizing the dead volume in these discharge ports 1511 and bypass holes 1512a and 1512b. At the same time, by minimizing the residual refrigerant in these discharge ports 1511 and bypass holes 1512a and 1512b, the compression efficiency can be improved.

[0176] On the other hand, other embodiments of the bypass valve will be described below.

[0177] That is, in the aforementioned embodiments, the guide portion of the bypass valve is formed in the shape of a solid rod, but depending on the circumstances, the guide portion of the bypass valve may also be formed in the shape of a hollow cylinder.

[0178] Figure 7 It is Figure 3 Another embodiment of the bypass valve is shown in a sectional perspective view. Figure 8 yes Figure 7 Assembly sectional view.

[0179] Refer again Figure 2 and Figure 4In the scroll compressor of this embodiment, a discharge port 1511 and bypass holes 1512a and 1512b are formed in the non-rotational end plate portion 151, and these discharge ports 1511 and bypass holes 1512a and 1512b are formed inside the valve receiving groove portion 155 recessed in the back surface 151a of the non-rotational end plate portion 151. Furthermore, a valve guide 171, which constitutes part of the valve assembly 170, is fastened to the back pressure plate 161 facing the back surface 151a of the non-rotational end plate portion 151. A discharge valve 1751 and bypass valves 1756 and 1757, which are piston valves, are slidably inserted into the valve guide 171 in an axial direction, and open and close the discharge port 1511 and bypass holes 1512a and 1512b, respectively. Therefore, by shortening the length of the discharge port 1511 and the bypass holes 1512a and 1512b, the dead volume in these discharge ports 1511 and bypass holes 1512a and 1512b can be reduced. The basic structure and function of these discharge valves 1751 and bypass valves 1756 and 1757 are the same as those in the aforementioned embodiments.

[0180] It should be noted that, in this embodiment, the bypass valves 1756 and 1757 can be formed into a hollow cylindrical shape. This reduces the weight of the bypass valves 1756 and 1757, thereby improving the valve's responsiveness. The first bypass valve 1756 and the second bypass valve 1757 are formed symmetrically about the discharge valve 1751; therefore, the following description focuses on the first bypass valve 1756, and the description of the first bypass valve 1756 will replace the description of the second bypass valve 1757.

[0181] Reference Figure 7 and Figure 8 The first bypass valve 1756 in this embodiment includes a first guide portion 1756a, a first valve portion 1756b, and a first stop portion 1756c. The basic structure of these first guide portions 1756a, first valve portions 1756b, and first stop portions 1756c is the same as that in the aforementioned embodiment, therefore, a detailed description of them will be provided instead of a description of the aforementioned embodiment.

[0182] However, the first guide portion 1756a is formed into a hollow cylindrical shape. In other words, a first weight-reducing portion 1756d can be formed inside the first guide portion 1756a. As a result, the weight of the first guide portion 1756a is reduced, thereby reducing the overall weight of the first bypass valve 1756 and improving valve responsiveness.

[0183] Specifically, the first weight-reducing portion 1756d is formed by recessing a predetermined depth from the first stop portion 1756c into the first opening / closing portion 1756b. In other words, the first stop portion 1756c is open, while the first opening / closing portion 1756b, which constitutes the actual opening / closing surface of the first bypass valve 1756, can be blocked. As a result, the actual length of the first bypass hole 1512a is shortened, thereby reducing the dead volume in the first bypass hole 1512a.

[0184] It should be noted that, as described in this embodiment, when the first weight-reducing portion 1756d is recessed from the first stop portion 1756c, a first oil drain hole 1756e can be formed, extending from the inner circumference of the first weight-reducing portion 1756d to the outer circumference of the first guide portion 1756a. Preferably, at least one first oil drain hole 1756e can be formed, and it should be formed as close as possible to the lower end of the first weight-reducing portion 1756d, i.e., around the periphery of the first opening / closing portion 1756b. Therefore, even if oil flows into the first weight-reducing portion 1756d, the oil can be discharged to the outside of the first bypass valve 1756 through the first oil drain hole 1756e. Thus, by suppressing oil deposition in the first weight-reducing portion 1756d, the weight increase of the first bypass valve 1756 can be prevented.

[0185] Although not shown in the figure, the first weight-reducing portion 1756d can also extend from the first opening / closing portion 1756b towards the first stop portion 1756c. In other words, the first weight-reducing portion 1756d can be recessed from the first opening / closing portion 1756b to one side of the first stop portion 1756c, and the first stop portion 1756c can be blocked. In this case, even if the first stop portion 1756c is located on the axially upward side, oil flow into the first weight-reducing portion 1756d can be prevented.

[0186] Although not shown in the figure, the first weight-reducing portion 1756d may be formed only inside the first guide portion 1756a. In other words, the first weight-reducing portion 1756d may be formed between the first opening / closing portion 1756b and the first stop portion 1756c. In this case, it can be formed by subsequently assembling the first opening / closing portion 1756b and / or the first stop portion 1756c to the first guide portion 1756a. Thus, while suppressing oil inflow into the first weight-reducing portion 1756d, the dead volume can be further reduced by shortening the actual length of the first bypass hole 1512a.

[0187] Although not shown in the figure, the first weight-reducing portion 1756d can also be formed laterally through the first guide portion 1756a. In this case, the valve responsiveness can be improved by reducing the weight of the first guide portion 1756a, while oil deposition in the first weight-reducing portion 1756d can be suppressed.

[0188] Although not shown in the figure, the first guide portion 1756a can also be formed as a plurality of thin rods. In this case, the first bypass valve guide hole 1722 can be formed as a plurality of small holes corresponding to the first guide portions 1756a, or it can be formed as an elongated hole shape to accommodate a plurality of first guide portions 1756a. In these cases, the area of ​​the first guide portion 1756a is also reduced, thereby reducing the weight of the first bypass valve 1756 and improving valve responsiveness.

[0189] On the other hand, other embodiments of the valve assembly will be described below.

[0190] That is, in the aforementioned embodiments, the valve assembly is fastened to the back pressure chamber assembly, but depending on the circumstances, the valve assembly can also be pressed and fixed between the non-rotating scroll and the back pressure chamber assembly.

[0191] Figure 9 It is shown Figure 2 A perspective view of another embodiment of the assembly structure of the valve guide. Figure 10 yes Figure 9 Assembly sectional view.

[0192] Reference Figure 9 and Figure 10 The scroll compressor of this embodiment includes: a housing 110, a drive motor 120, a main frame 130, a rotary scroll plate 140, a non-rotating scroll plate 150, and a back pressure chamber assembly 160. The aforementioned valve assembly 170 is disposed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The basic structure and function of the non-rotating scroll plate 150 and the back pressure chamber assembly 160, including the valve assembly 170, are similar to those of the aforementioned embodiment.

[0193] For example, the valve receiving groove 155 can be formed by recessing a predetermined depth in the center of the back surface 151a of the non-rotating end plate 151. The valve guide 171 constituting the valve assembly 170 is inserted into the valve receiving groove 155 and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The discharge valve 1751 and the bypass valve 1755 are slidably coupled to the valve guide 171, and the discharge port 1511 and the bypass hole are opened and closed inside the valve receiving groove 155. As a result, by shortening the length of the discharge port 1511 and the bypass holes 1512a and 1512b, the dead volume in the discharge port 1511 and the bypass holes 1512a and 1512b can be reduced.

[0194] However, in this embodiment, the valve guide 171 is not fastened to the back pressure chamber assembly 160. Instead, the valve guide 171 can be pressed and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160 by the fastening force of the back pressure chamber assembly 160 fastened to the non-rotating scroll plate 150. Thus, the valve assembly 170 can both eliminate the fastening members 1771 and 1772 in the aforementioned embodiments and be firmly fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160.

[0195] Specifically, a guide support surface 1554 extending in a stepped manner from the valve mounting surface 1551 can be formed on the bottom surface of the guide insertion groove 1553. In other words, the guide support surface 1554 can be formed by extending a predetermined height towards the back surface 161a of the back pressure plate 161. Thus, the guide support surface 1554 constituting the bottom surface of the guide insertion groove 1553 protrudes a predetermined height from the valve mounting surface 1551. Therefore, even if the first axial side surface 173a of the guide fixing protrusion 173 is in close contact with the guide support surface 1554, the aforementioned first ejection guide channel 170b can be formed between the first axial side surface 172a of the guide body portion 172 and the valve mounting surface 1551.

[0196] As described above, when the valve guide 171 is not fastened to the back pressure chamber assembly 160, but is fixed by the fastening force of the back pressure chamber assembly 160 fastened to the non-rotating scroll plate 150, no additional fastening components will be used, thereby simplifying the assembly process and saving manufacturing costs.

[0197] Although not shown in the figure, the guide separating protrusion (not shown) can extend from the first axial side 173a of the guide fixing protrusion 173 towards the bottom surface of the guide insertion groove 1553 to protrude beyond a predetermined height, or the aforementioned guide support surface and guide separating protrusion can be formed separately. In these cases, even if the valve guide 171 is not fastened to the back pressure chamber assembly 160, it can be fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160.

[0198] On the other hand, another embodiment of the valve assembly will be described below.

[0199] That is, in the aforementioned embodiments, the valve assembly is fastened to the back pressure chamber assembly, but depending on the circumstances, the valve assembly may also be fastened to a non-rotating scroll plate.

[0200] Figure 11 It is Figure 1 An exploded perspective view of another embodiment of the valve assembly is shown. Figure 12 It is Figure 11 The valve assembly is assembled onto a non-rotating scroll plate, and a three-dimensional view is shown. Figure 13It is Figure 12 The back pressure chamber assembly is assembled onto the non-rotating vortex disk, and a cross-sectional view is shown. Figure 14 yes Figure 13 The cross-sectional view along line "X-X", Figure 15 It is Figure 12 An enlarged perspective view of the valve guide and bypass valve.

[0201] Refer again Figure 1 The scroll compressor of this embodiment includes: a housing 110, a drive motor 120, a main frame 130, a rotary scroll plate 140, a non-rotating scroll plate 150, and a back pressure chamber assembly 160. The aforementioned valve assembly 170 is disposed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The basic structure and function of the non-rotating scroll plate 150 and the back pressure chamber assembly 160, including the valve assembly 170, are similar to those of the aforementioned embodiment.

[0202] For example, the valve receiving groove 155 can be formed by recessing a predetermined depth in the center of the back surface 151a of the non-rotating end plate 151. The valve guide 171 constituting the valve assembly 170 is inserted into the valve receiving groove 155 and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The discharge valve 1751 and the bypass valve 1755 are slidably coupled to the valve guide 171 and open / close the discharge port 1511 and the bypass holes 1512a and 1512b inside the valve receiving groove 155. Thus, by shortening the length of the discharge port 1511 and the bypass holes 1512a and 1512b, the dead volume in the discharge port 1511 and the bypass holes 1512a and 1512b can be reduced.

[0203] It should be noted that, in this embodiment, the valve guide 171 constituting the valve assembly 170 is fastened to the back side of the non-rotating scroll plate 150, that is, the back side 151a of the non-rotating end plate portion 151. For example, a portion of the valve guide 171 may be fastened to the back side 151a of the non-rotating end plate portion 151 in a state that exposes the exterior of the valve receiving groove portion 155.

[0204] Reference Figure 11 and Figure 12 As in the aforementioned embodiment, a valve receiving groove 155 is formed at the center of the back surface 151a of the non-rotating end plate portion 151 in this embodiment, and a plurality of guide fastening grooves 1514 are formed on the outside of the valve receiving groove portion 155. The guide fastening grooves 1514 are formed at a predetermined interval from the valve receiving groove portion 155 and are located on the same axis as the guide fastening hole 1731 provided on the guide fixing protrusion 173. Thus, the valve guide 171 can be fastened to the non-rotating scroll plate 150 by fastening members 1771 and 1772 passing through the guide fastening hole 1731 and fastened to the guide fastening groove 1514.

[0205] In other words, the valve guide 171 of this embodiment may include a guide body portion 172 and a guide fixing protrusion 173. The guide body portion 172, which is provided with a discharge valve guide hole 1721 and a bypass valve guide hole 1722, can be accommodated in the valve receiving groove portion 155. The guide fixing protrusion 173, which is provided with a guide fastening hole 1731 and extends laterally from both ends of the guide body portion 172, can be fastened to the back surface 151a of the non-rotating end plate portion 151 in a state exposed to the outside of the valve receiving groove portion 155, as described above.

[0206] In this case, such as Figure 13 and Figure 15 As shown, the thickness H21 of the guide body 172 is less than the height of the guide receiving surface 1552, in other words, less than the depth D1 of the valve receiving groove 155. As a result, the aforementioned first discharge guide channel 170b is formed between the first axial side surface 172a of the guide body 172 and the valve mounting surface 1551 facing thereto.

[0207] It should be noted that if the thickness H21 of the guide body 172 is too thin, the opening and closing length of the bypass valve 1755 (described later) will be too long, which may lead to a delay in the closing action. Therefore, the thickness H21 of the guide body 172 can preferably be greater than or equal to the distance G1 between the valve mounting surface 1551 and the first axial side surface 172a of the guide body 172 facing the valve mounting surface 1551. This ensures the first discharge guide channel 170b and suppresses the backflow of refrigerant through the bypass holes 1512a and 1512b by rapidly closing the bypass valve 1755.

[0208] Furthermore, the cross-sectional area of ​​the guide body 172 is smaller than the cross-sectional area of ​​the valve receiving groove 155. In other words, the guide body 172 is formed into an elliptical shape with a minor axis length smaller than the inner diameter of the valve receiving groove 155. As a result, a second discharge guide channel 170c connecting the first discharge guide channel 170b and the intermediate discharge port 1612a is formed between the outer peripheral surface of the guide body 172 and the inner peripheral surface of the valve receiving groove 155.

[0209] A guide receiving groove 1611e with a predetermined axial recess is formed on the back side 161a of the back pressure plate 161 facing the second axial side 171b of the valve guide 171 to accommodate the upper half of the valve guide 171, in other words, to accommodate the guide body 172 and the guide fixing protrusion 173 extending from the guide body 172. Thus, the valve guide 171, exposed outside the valve receiving groove 155, can be accommodated in the guide receiving groove 1611e of the back pressure chamber assembly 160. Therefore, the valve assembly 170 can be tightly fastened to each other when positioned between the back side 151a of the non-rotating scroll plate 150 and the back side 161a of the back pressure chamber assembly 160 facing the back side 151a.

[0210] Furthermore, an intermediate discharge port 1612a is formed inside the guide receiving groove 1611e, and a valve guide groove 1612b for accommodating the discharge valve 1751 is formed inside the intermediate discharge port 1612a. In this case, the lower end of the valve guide groove 1612b is formed to overlap the guide receiving groove 1611e radially. As a result, the length of the valve guide groove 1612b is extended to a considerable length, thereby stably supporting the reciprocating motion of the discharge valve 1751, which will be described later. Moreover, since the length of the discharge valve 1751 can be shortened to a minimum, the valve responsiveness can be improved by correspondingly reducing the weight of the discharge valve 1751.

[0211] Furthermore, the guide receiving groove 1611e can be formed to have the same shape as the outer peripheral surface of the valve guide 171, that is, the guide receiving groove 1611e can be formed to be elliptical. However, the cross-sectional area of ​​the guide receiving groove 1611e can be larger than the cross-sectional area of ​​the valve guide 171, and the depth D2′ of the guide receiving groove 1611e can be larger than the thickness H22 of the guide fixing protrusion 173. Thus, between the guide receiving groove 1611e and the valve guide 171, another part of the discharge guide channel 170a, namely the third discharge guide channel 170d, can be continuously formed with the aforementioned second discharge guide channel 170c. Thus, the refrigerant discharged through the discharge port 1511 and the bypass hole can continuously pass through the first discharge guide channel 170b, the second discharge guide channel 170c, and the third discharge guide channel 170d, and then be discharged through the intermediate discharge port 1612a to the high-pressure section 110b of the housing 110.

[0212] On the other hand, as described above, the valve guide 171 has a discharge valve guide hole 1721, a first bypass valve guide hole 1722a, and a second bypass valve guide hole 1722b. The discharge valve guide hole 1721 is formed at the center of the valve guide 171, and the first bypass valve guide hole 1722a and the second bypass valve guide hole 1722b are formed on both sides of the discharge valve guide hole 1721. The basic shape and function of the discharge valve guide hole 1721, the first bypass valve guide hole 1722a, and the second bypass valve guide hole 1722b are the same as those in the aforementioned embodiment, therefore, their description is replaced by the description of the aforementioned embodiment. The same applies to the discharge valve 1751.

[0213] However, the bypass valve 1755 in this embodiment differs from the aforementioned embodiment in that the opening and closing portions 1756b and 1757b are larger than the bypass valve guide holes 1722a and 1722b, thereby also serving as a stop portion to limit the opening degree of the bypass valve 1755. The first bypass valve 1756 and the second bypass valve 1757 are formed symmetrically with respect to the discharge valve 1751. Therefore, in the following description, the first bypass valve 1756 will be the focus, and the description of the first bypass valve 1756 will replace the description of the second bypass valve 1757.

[0214] Reference Figures 13 to 15 The first bypass valve 1756 in this embodiment includes a first guide portion 1756a and a first opening and closing portion 1756b.

[0215] The first guide portion 1756a can be formed into an arc-shaped cross-section, similar to the aforementioned embodiment, and can be formed into a solid rod shape. This allows for both a shorter length of the first bypass hole 1512a and easier fabrication of the first guide portion 1756a.

[0216] The first guide portion 1756a can be formed into an arc-shaped cross-section and is smaller than the first bypass hole 1512a. For example, the cross-sectional area (arc length) of the first guide portion 1756a can be significantly smaller than the cross-sectional area (arc length) of the first bypass hole 1512a. Thus, the first guide portion 1756a can be formed into a solid rod shape, and its weight can be reduced.

[0217] The first opening / closing portion 1756b is configured as the lower axial end of both ends of the first guide portion 1756a, and can be formed by extending laterally from the end facing the first bypass hole 1512a. For example, the cross-sectional area of ​​the first opening / closing portion 1756b can be larger than not only the cross-sectional area of ​​the first bypass hole 1512a, but also larger than the cross-sectional area of ​​the bypass valve guide hole 1722. Thus, during assembly and / or opening operation, the first opening / closing portion 1756b of the bypass valve 1755 is engaged with the first axial side surface 172a of the guide body portion 172, thereby preventing disengagement from the valve guide 171. Thus, the valve assembly 170 including the bypass valve 1755 is modularized, thereby allowing easy assembly of the valve assembly 170. Furthermore, by appropriately limiting the opening degree of the bypass valve 1755 to improve valve responsiveness, backflow of refrigerant through the first bypass hole 1512a can be suppressed while applying the piston valve, thereby improving compression efficiency.

[0218] On the other hand, in the first bypass valve 1756, a first weight-reducing portion 1756d may be formed inside the first guide portion 1756a, or the first guide portion 1756a may be formed from a plurality of rods. In these cases, the cross-sectional area of ​​the first guide portion 1756a is reduced, resulting in a weight reduction, which in turn reduces the valve weight. Figure 16 and Figure 17 This is a perspective view showing another embodiment of the bypass valve.

[0219] Reference Figure 16 The first guide portion 1756a can be formed in the shape of a hollow cylinder. For example, a first weight-reducing portion 1756d can be formed inside the first guide portion 1756a. In this case, the first weight-reducing portion 1756d can be formed only inside the first guide portion 1756a and both ends of the first guide portion 1756a can be sealed, or the first weight-reducing portion 1756d can be formed by recessing from the first opening and closing portion 1756b towards the opposite end (upper end) of the first guide portion 1756a, or the first weight-reducing portion 1756d can be formed by recessing from one end (upper end) of the first guide portion 1756a towards the first opening and closing portion 1756b to a predetermined depth. This embodiment shows an example in which the first weight-reducing portion 1756d is recessed from one end (upper end) of the first guide portion 1756a towards the first opening and closing portion 1756b to a predetermined depth.

[0220] In this case, a first oil drain hole 1756e can be formed, extending from the inner circumference of the first weight-reducing portion 1756d to the outer circumference of the first guide portion 1756a. Thus, even if oil flows into the interior of the first weight-reducing portion 1756d, the oil can be quickly discharged through the first oil drain hole 1756e, thereby inhibiting oil deposition in the first weight-reducing portion 1756d.

[0221] Reference Figure 17The first guide portion 1756a can be formed as a plurality of rods. For example, the first guide portion 1756a is composed of two rods, and these first guide portions 1756a can be formed as a circular cross-sectional shape. Thus, it is possible to form a plurality of first guide portions 1756a, and weight can be reduced by minimizing the cross-sectional area of ​​these first guide portions 1756a.

[0222] Furthermore, the first guide portion 1756a can be composed of two rods and can extend axially from both ends of the first opening and closing portion 1756b. In this way, the first guide portions 1756a on both sides can be formed relatively thin, while the first opening and closing portion 1756b can be stably supported.

[0223] As described above, when the first guide portion 1756a is composed of two rods, the bypass valve guide hole 1722a for slidably inserting these first guide portions 1756a can be formed in a plurality, or it can be formed as a single hole. For example, the bypass valve guide hole 1722a can be formed in a plurality corresponding to the number of first guide portions 1756a, but it can also be formed as a single hole so that all first guide portions 1756a can be inserted at the same time. This embodiment shows an example where the bypass valve guide hole 1722a is a single hole. In this case, the bypass valve guide hole 1722a is formed with an arc-shaped cross-section, so that each first guide portion 1756a can be slidably inserted into both ends of the bypass valve guide hole 1722a. Thus, the weight of the first guide portion 1756a can be reduced by making the first guide portion 1756a composed of a plurality of rods, and the bypass valve guide hole 1722a can be easily formed.

[0224] On the other hand, another embodiment of the valve assembly will be described below.

[0225] That is, in the aforementioned embodiments, the valve assembly is fastened to the non-rotating scroll plate, but depending on the circumstances, the valve assembly can also be pressed and fixed between the non-rotating scroll plate and the back pressure chamber assembly.

[0226] Figure 18 It is shown Figure 11 A perspective view of another embodiment of the assembly structure of the valve guide. Figure 19 yes Figure 18 Assembly sectional view.

[0227] Refer again Figure 1The scroll compressor of this embodiment includes: a housing 110, a drive motor 120, a main frame 130, a rotary scroll plate 140, a non-rotating scroll plate 150, and a back pressure chamber assembly 160. The aforementioned valve assembly 170 is disposed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The basic structure and function of the non-rotating scroll plate 150 and the back pressure chamber assembly 160, including the valve assembly 170, are similar to those of the aforementioned embodiment.

[0228] For example, the valve receiving groove 155 can be formed by recessing a predetermined depth in the center of the back surface 151a of the non-rotating end plate 151. The valve guide 171 constituting the valve assembly 170 is inserted into the valve receiving groove 155 and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160. The discharge valve 1751 and the bypass valve 1755 are slidably coupled to the valve guide 171, and the discharge port 1511 and the bypass hole are opened and closed inside the valve receiving groove 155. As a result, by shortening the length of the discharge port 1511 and the bypass holes 1512a and 1512b, the dead volume in the discharge port 1511 and the bypass holes 1512a and 1512b can be reduced.

[0229] However, in this embodiment, the valve guide 171 is not fastened to the non-rotating scroll plate 150. Instead, the valve guide 171 can be pressed and fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160 by the fastening force of the back pressure chamber assembly 160 fastened to the non-rotating scroll plate 150. Thus, the valve assembly 170 can be securely fixed between the non-rotating scroll plate 150 and the back pressure chamber assembly 160 without the use of additional fastening components.

[0230] Reference Figure 18 and Figure 19 The guide fixing protrusion 173 of the valve guide 171 can be inserted into the guide receiving groove 1611e of the back pressure plate 161. While the first axial side 173a of the guide fixing protrusion 173 is in close contact with the back surface 151a of the non-rotating end plate portion 151, the second axial side 173b of the guide fixing protrusion 173 can be in close contact with and fixed to the back surface 161a of the back pressure plate 161 inside the guide receiving groove 1611e.

[0231] In this case, the depth D4 of the guide receiving groove 1611e can be greater than the thickness of the valve guide 171, i.e., the thickness H22 of the guide fixing protrusion 173, thereby forming the third ejection guide channel 170d in the aforementioned embodiment. However, a guide support surface 1611f can be formed between the guide fixing protrusion 173 and the guide receiving groove 1611e facing it.

[0232] For example, the guide support surface 1611f can be formed by protruding a predetermined height from the bottom of the guide receiving groove 1611e toward the second axial side surface 173b of the guide fixing protrusion 173. In this case, the height H4 of the guide support surface 1611f can be formed as the height of the guide receiving groove 1611e minus the thickness H22 of the guide fixing protrusion 173. As a result, the first axial side surface 173a of the guide fixing protrusion 173 is in close contact with the back surface 151a of the non-rotating end plate portion 151, and the second axial side surface 173b of the guide fixing protrusion 173 is in close contact with the guide support surface 1611f.

[0233] Therefore, the guide fixing protrusion 173 can be fixed by the back surface 151a of the non-rotating end plate portion 151 and the guide support surface 1611f constituting the bottom surface of the guide receiving groove 1611e when inserted into the guide receiving groove 1611e. As a result, when the valve guide 171 is not fastened to the non-rotating scroll plate 150, but is fixed by the fastening force of the back pressure chamber assembly 160 fastened to the non-rotating scroll plate 150, no additional fastening components are used, thereby simplifying the assembly process of the valve assembly 170 and saving manufacturing costs.

[0234] Although not shown in the figure, the guide support surface (not shown) can extend from the guide fixing protrusion 173 to the guide receiving surface 1611e, or the guide support surface (not shown) 1611f can extend halfway from the guide fixing protrusion 173 and the guide receiving surface 1611e respectively. In these cases, fastening members can be eliminated, thereby simplifying the assembly process of the valve assembly 170.

[0235] On the other hand, as described above, embodiments of the valve assembly of the present invention can be applied not only to hermetically sealed scroll compressors, but also to open scroll compressors; not only to low-pressure scroll compressors, but also to high-pressure scroll compressors; and not only to vertical scroll compressors, but also to horizontal scroll compressors. Furthermore, embodiments of the valve assembly of the present invention can be applied not only to non-rotary back pressure systems, but also to rotary back pressure systems or end-sealed systems. In particular, in rotary back pressure systems or end-sealed systems, an additional plate can be fixed to the back of the non-rotary scroll plate (fixed scroll plate) instead of the back pressure chamber assembly provided in the non-rotary back pressure system, and this plate can be used to fix the valve assembly of the aforementioned embodiments. In these embodiments, the basic structure of the valve assembly or its functional effect can be substantially the same as in the aforementioned embodiments.

Claims

1. A scroll compressor, wherein, include: case; A vortex disk rotates in conjunction with a rotating shaft within the internal space of the housing. A non-rotating scroll plate engages with the rotating scroll plate to form a compression chamber. The non-rotating scroll plate has a discharge port and a bypass hole to discharge the refrigerant from the compression chamber. as well as The back pressure chamber assembly, having an intermediate outlet communicating with the internal space of the housing, is attached to the back side of the non-rotating scroll disk, applying pressure to the non-rotating scroll disk towards the rotating scroll disk side. A valve receiving groove is formed by recessing a predetermined depth on the back side of the non-rotating scroll plate, and the discharge port and the bypass hole are accommodated in the valve receiving groove. A valve guide, which is inserted into the valve receiving groove, is provided between the back side of the non-rotating scroll plate and the back side of the back pressure chamber assembly facing the back side of the non-rotating scroll plate. A discharge guide channel is formed between the valve guide and the valve receiving groove, which connects the discharge port and the bypass hole with the intermediate discharge port. The valve guide has a discharge valve guide hole, and the discharge valve that opens and closes the discharge port is slidably inserted into the discharge valve guide hole. A bypass valve guide hole is provided in the valve guide. The bypass valve guide hole is formed on both sides of the valve guide, with the bypass valve guide hole being separated from the discharge valve guide hole. The bypass valve that opens and closes the bypass hole is slidably inserted into the bypass valve guide hole along the axial direction.

2. The scroll compressor according to claim 1, wherein, The thickness of the valve guide is less than the depth of the valve receiving groove, so as to form a first discharge guide channel between the first side of the valve guide and the valve receiving groove. The cross-sectional area of ​​the valve guide is smaller than the cross-sectional area of ​​the valve receiving groove, so as to form a second discharge guide channel between the outer peripheral surface of the valve guide and the inner peripheral surface of the valve receiving groove. The first ejection guide channel and the second ejection guide channel are connected to each other.

3. The scroll compressor according to claim 1, wherein, A guide insertion groove is formed on the back side of the non-rotating scroll plate, and the guide insertion groove is formed by recessing a predetermined depth outside the valve receiving groove. The valve guide is inserted into the guide insertion slot and fixed to the back side of the back pressure chamber assembly.

4. The scroll compressor according to claim 3, wherein, The guide insertion groove extends outward from the inner circumference of the valve receiving groove. The depth of the guide insertion groove is less than or equal to the depth of the valve receiving groove.

5. The scroll compressor according to claim 3, wherein, A guide-separating protrusion is formed on the second axial side of the valve guide facing the back pressure chamber assembly, extending axially toward the back side of the back pressure chamber assembly. The height of the guide separating the protrusion is less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove.

6. The scroll compressor according to claim 5, wherein, The valve guide is provided with a guide fastening hole through which a fastening member for fastening to the non-rotating scroll plate passes. The guide fastening hole is formed by penetrating the spaced protrusion of the guide along the axial direction.

7. The scroll compressor according to claim 3, wherein, A discharge guide groove for accommodating the bypass valve is formed on the back side of the back pressure chamber assembly facing the valve guide. The depth of the ejection guide groove is less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove.

8. The scroll compressor according to claim 7, wherein, The intermediate discharge port connects the discharge port and the bypass hole to the internal space of the housing. The discharge guide groove is formed in a ring shape and is connected to the intermediate discharge port.

9. The scroll compressor according to claim 7, wherein, A guide-separating protrusion is formed on the second axial side of the valve guide facing the back pressure chamber assembly, extending axially toward the back side of the back pressure chamber assembly. The length of the sum of the height of the guide protrusion and the depth of the ejection guide groove is less than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove.

10. The scroll compressor according to claim 3, wherein, The valve guide includes: The guide body is inserted into the valve receiving groove; and A guide fixing protrusion extends from the guide body and is inserted into the guide insertion groove; a guide fastening hole extends axially through the guide fixing protrusion. The valve guide is secured to the back of the back pressure chamber assembly by a fastening member that is fastened to the back of the back pressure chamber assembly through the guide fastening hole.

11. The scroll compressor according to claim 3, wherein, The valve guide includes: The guide body is inserted into the valve receiving groove; and A guide fixing protrusion extends from the guide body and inserts into the guide insertion groove. At least one of the guide insertion groove and the guide fixing protrusion facing the guide insertion groove has an axially extending guide support surface. The valve guide's fixing protrusion is pressed and fixed by the non-rotating scroll plate and the back pressure chamber assembly using the guide support surface.

12. The scroll compressor according to claim 1, wherein, A guide receiving groove is formed by recessing a predetermined depth on the back side of the back pressure chamber assembly. The valve guide is housed in the guide receiving groove and is fixed to the back of the non-rotating scroll plate outside the valve receiving groove.

13. The scroll compressor according to claim 12, wherein, The intermediate discharge port connects the discharge port and the bypass hole to the internal space of the housing. An ejection guide channel communicating with the intermediate ejection port is continuously formed between the valve guide and the valve receiving groove, and between the valve guide and the guide receiving groove.

14. The scroll compressor according to claim 13, wherein, A valve guide groove is formed on the inner side of the intermediate discharge port to accommodate a discharge valve for opening and closing the discharge port. The guide receiving groove and the valve guide groove overlap radially.

15. The scroll compressor according to claim 12, wherein, The valve guide includes: The guide body is inserted into the valve receiving groove; and The guide fixing protrusion extends from the guide body portion toward the outside of the valve receiving groove portion, and the guide fastening hole penetrates the guide fixing protrusion axially. The valve guide is secured to the back of the non-rotating scroll plate by a fastening member that is fastened to the back of the non-rotating scroll plate through the guide fastening hole.

16. The scroll compressor according to claim 12, wherein, The valve guide includes: The guide body is inserted into the valve receiving groove; and The guide fixing protrusion extends from the guide body portion toward the outside of the valve receiving groove portion. At least one of the guide receiving groove and the guide fixing protrusion facing the guide receiving groove has an axially extending guide support surface. The valve guide's fixing protrusion is pressed and fixed by the non-rotating scroll plate and the back pressure chamber assembly using the guide support surface.

17. The scroll compressor according to claim 12, wherein, The thickness of the valve guide inserted into the valve receiving groove is greater than or equal to the distance between the valve receiving groove and the first axial side of the valve guide facing the valve receiving groove.

18. The scroll compressor according to any one of claims 1 to 17, wherein, The bypass valve includes: One or more guide portions are slidably inserted into the bypass valve guide port; and An opening and closing part is provided at one end of the guide part to open and close the bypass hole.

19. The scroll compressor according to claim 18, wherein, A stop portion extending laterally from the guide portion is formed at the other end of the guide portion. The cross-sectional area of ​​the stop portion is larger than the cross-sectional area of ​​the bypass valve guide hole, so that the stop portion is axially supported on the second axial side of the valve guide.

20. The scroll compressor according to claim 18, wherein, The cross-sectional area of ​​the opening and closing part is larger than the cross-sectional area of ​​the bypass valve guide hole, so that the opening and closing part is axially supported on the first axial side of the valve guide.

21. The scroll compressor according to claim 18, wherein, A weight-reducing section is formed inside the bypass valve. The weight-reducing section is formed by recessing a predetermined depth from one end of the bypass valve to the other end.

22. The scroll compressor according to claim 21, wherein, The weight-reducing portion is formed by recessing into the opening and closing portion from the opposite side of the opening and closing portion. An oil drain hole is formed in the guide portion, extending from the inner circumference of the weight-reducing portion to the outer circumference of the guide portion.

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