Reciprocating compressor

Abstract

The invention relates to a reciprocating compressor. The reciprocating compressor includes: a housing; the driving motor is arranged in the shell and is provided with a stator and a rotor; a drive shaft coupled to a rotor of the drive motor; a piston coupled to the drive shaft and reciprocating; a cylinder body having a cylinder portion into which the piston is inserted in a reciprocating manner to form a compression chamber, and a bearing portion through which the drive shaft penetrates such that the bearing portion supports the drive shaft in a radial direction of the drive shaft; the supporting plate is arranged between the driving motor and the cylinder barrel and supports the cylinder barrel on the driving motor in the axial direction of the driving shaft; one side surface of the supporting plate is combined with the stator, and the other side surface of the supporting plate is combined with the cylinder barrel body. Thus, the weight of the cylinder body can be reduced to reduce the weight and / or size of the compressor, and the squareness and roundness of the bearing part and the cylinder part can be ensured to improve the reliability.

Description

Technical Field

[0001] The present invention relates to a reciprocating compressor. Background Art

[0002] A reciprocating compressor is a type of compressor that causes a piston to reciprocate inside a cylinder to suck refrigerant into a compression chamber formed inside the cylinder, compress it, and then discharge it. Generally, the cylinder constitutes a part of a cylinder body made of a casting, and can be formed by extending from a frame portion that supports the drive shaft in the radial and axial directions of the drive shaft as a single body. In other words, the cylinder can be defined as a cylinder portion, and can be formed eccentrically in the radial direction of the drive shaft from one side of the frame portion that constitutes a part of the cylinder body.

[0003] As described above, the cylinder body is formed by a casting, a bearing portion extending in the axial direction of the drive shaft and supporting the drive shaft in the radial direction may be formed at the center of the frame portion, and a plurality of fixing protrusions protruding in the axial direction of the drive shaft toward the stator may be formed at the corners of the frame portion. Thus, the cylinder body can be combined with the stator and elastically supported by the housing.

[0004] Patent document 1 (Korean Publication Patent No. 10-2003-0083367) shows an example in which a cylinder portion and a bearing portion supporting a drive shaft are formed as a single body. This is not only beneficial for ensuring the right angle of the cylinder portion and the bearing portion, but also beneficial for ensuring the roundness of the cylinder portion. However, as described above, in Patent Document 1, the fixing protrusion that fastens the cylinder body to the stator also extends from the frame portion and forms a single body with the cylinder portion and the bearing portion. Therefore, not only the shape of the cylinder body including the cylinder portion, the bearing portion, the frame portion and the fixing protrusion becomes complicated, but also the weight of the cylinder body is increased, which may become a factor that hinders the lightweighting and / or miniaturization of the compressor.

[0005] Patent document 2 (Korean Publication Patent No. 10-2004-0078960) shows an example in which a cylinder portion is assembled to a frame portion in a cylinder body. This allows various changes to be made to the shape of the cylinder body including the cylinder portion. However, in Patent Document 2, as the cylinder portion and the bearing portion are later assembled, it may be difficult to ensure the right angle between the cylinder portion and the bearing portion and / or the roundness of the cylinder portion. In addition, similar to Patent Document 1, in Patent Document 2, the frame portion and the fixing protrusion are not only formed as a single body, but are also made of castings, so there are still limitations in achieving lightweight and / or miniaturization of the compressor. Summary of the invention

[0006] An object of the present invention is to provide a reciprocating compressor that is advantageous for weight reduction and / or miniaturization.

[0007] Another object of the present invention is to provide a reciprocating compressor that can easily manufacture a cylinder body including a cylinder portion and achieve weight reduction by minimizing the portion made of a casting.

[0008] Another object of the present invention is to provide a reciprocating compressor in which a fixing protrusion for fixing the cylinder body to the stator can be removed from the cylinder body and the cylinder body can be stably and easily connected to the stator.

[0009] Another object of the present invention is to provide a reciprocating compressor capable of maintaining the right angle between the cylinder portion and the bearing portion while ensuring the roundness of the cylinder portion.

[0010] In order to achieve the purpose of the present invention, a reciprocating compressor including a housing, a drive motor, a drive shaft, a piston, a cylinder body and a support plate can be provided. The drive motor can be arranged inside the housing and can have a stator and a rotor. The drive shaft can be combined with the rotor of the drive motor. The piston can be combined with the drive shaft and reciprocate. The cylinder body can have a cylinder portion and a bearing portion, the piston is inserted into the cylinder portion in a reciprocating manner to form a compression chamber, and the drive shaft passes through the bearing portion so that the bearing portion supports the drive shaft in the radial direction. The support plate can be arranged between the drive motor and the cylinder body, and the cylinder body can be supported to the drive motor along the axial direction of the drive shaft. In other words, one side of the support plate can be combined with the stator, and the other side can be combined with the cylinder body. Thus, the weight of the cylinder body can be reduced to make the compressor lightweight and / or miniaturized, and the right angle and roundness of the bearing portion and the cylinder portion can also be ensured to improve reliability.

[0011] As an example, the support plate may include a first cylinder body support portion and a plurality of second cylinder body support portions. The cylinder body may be placed on the first cylinder body support portion and supported along the axial direction of the drive shaft. The plurality of second cylinder body support portions may be bent from the first cylinder body support portion toward the stator and placed on the stator, respectively, and may be supported on the stator along the axial direction of the drive shaft. Thus, by making the support plate from sheet metal, not only can the support plate be manufactured simply, but also the weight of the support plate can be reduced.

[0012] For example, the first cylinder body supporting portion and the second cylinder body supporting portion may be formed to have the same thickness as each other. Thus, not only the shape of the cylinder body can be simplified, but also the volume of the cylinder body can be reduced, thereby reducing the weight of the compression part.

[0013] In addition, a bearing accommodating portion penetrating along the axial direction of the drive shaft may be formed on the first cylinder body support portion to surround and accommodate the bearing portion. A cylinder accommodating portion opening along the radial direction of the drive shaft may be formed on one side of the bearing accommodating portion to accommodate the cylinder portion. Thus, the first cylinder body support portion is formed in an arc shape, and the first cylinder body support portion overlaps the cylinder portion along the axial direction of the drive shaft, so that the frame portion of the cylinder body can be formed thinner.

[0014] In addition, the plurality of second cylinder body support parts may include a bending portion and a lifting portion. The bending portion may be bent from the first cylinder body support part along the axial direction of the drive shaft toward the axial side of the stator. The lifting portion may be bent from the other end of the bending portion along the axial side of the stator, and may be supported on the axial side of the stator along the axial direction of the drive shaft. Thus, the cylinder body may be combined with the stator at a preset height through the support plate while reducing the volume of the cylinder body.

[0015] Specifically, the plurality of the supporting parts can be fastened to the stator by a stator fastening member penetrating the stator. Thus, the assembly work of the stator and the support plate coupled to the stator can be unified, thereby reducing the number of assembly man-hours.

[0016] More specifically, the plurality of lifting portions may be formed by bending the respective bending portions in the same direction along the reciprocating direction of the piston, thereby simplifying the bending operation of the lifting portions and improving the workability of the support plate including the lifting portions.

[0017] More specifically, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the first support part located on the cylinder part side with the second center line as the reference can be bent to face the inner peripheral surface of the shell, and the second support part located on the opposite side of the cylinder part with the second center line as the reference can be bent to face away from the inner peripheral surface of the shell. In this way, the overturning moment of the cylinder body can be reduced by ensuring a long support length of the support plate while simplifying the fastening of the first support part located on the cylinder part side.

[0018] In addition, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the first support part located on the cylinder part side with the second center line as the reference can be bent to face away from the inner peripheral surface of the shell, and the second support part located on the opposite side of the cylinder part with the second center line as the reference can be bent to face the inner peripheral surface of the shell. In this way, the support length for supporting the cylinder part side is long, so that the relatively heavy cylinder part can be stably supported.

[0019] In addition, the plurality of lifting portions may be formed by bending the respective bending portions in opposite directions along the reciprocating direction of the piston, thereby simplifying the sheet metal work of the support plate.

[0020] For example, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the first support part located on the cylinder part side and the second support part located on the opposite side of the cylinder part can be bent to face away from the inner peripheral surface of the housing with reference to the second center line. Thus, by forming the support length of the support plate long, the cylinder body can be supported more stably.

[0021] In addition, when the center line of the reciprocating direction of the piston is taken as the first center line and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the first support part located on the cylinder part side and the second support part located on the opposite side of the cylinder part can be bent toward the inner peripheral surface of the housing with reference to the second center line. Thus, by minimizing the length of the support plate, the weight of the support plate can be minimized.

[0022] As another example, the support plate may have at least one bending line formed between one end coupled to the cylinder body and the other end coupled to the stator. At least one reinforcing rib may be formed on the bending line. Thus, even if the second cylinder body support portion including the extension portion is formed by bending from the first cylinder body support portion, the rigidity of the second cylinder body support portion is increased, thereby being able to support the cylinder body more stably.

[0023] As another example, the support plate may be formed with a stop convex portion protruding along the axial direction of the drive shaft and contacting the cylinder body. The stop convex portion may be formed so that, when projected along the axial direction of the drive shaft, at least a portion of it is located on a line passing through the center of the cylinder portion. Thus, as the stop convex portion supports the cylinder body in the reciprocating direction of the piston, the cylinder body is prevented from being pushed away from the support plate due to the repeated reciprocating motion of the piston, thereby being able to more stably support the cylinder body in the radial and / or axial directions.

[0024] For example, the stopper protrusion may be bent to overlap with the cylinder body in the axial direction of the drive shaft. Thus, the cylinder body support portion is arranged on the first cylinder body support portion and supported in the axial direction of the drive shaft, so that the cylinder body can be stably supported on the support plate.

[0025] In addition, the cylinder body may be provided with a cylinder body protrusion protruding in the axial direction of the drive shaft and facing the stop protrusion in the radial direction of the drive shaft. The stop protrusion and the cylinder body protrusion may be fastened or embedded in combination with an additional fastening member. Thus, the cylinder body and the support plate may be easily assembled.

[0026] As another example, the support plate may be formed of a material lighter than the cylinder body. For example, the cylinder body may be formed of a cast iron material, and the support plate may be formed of an aluminum material. Thus, by reducing the weight of the support plate, the weight of the compression part may be further reduced.

[0027] As another example, the cylinder body and the support plate may be fastened by a cylinder body fastening member penetrating the cylinder body and the support plate, thereby making it possible to simply and firmly combine the cylinder body and the support plate.

[0028] As another example, an embedding protrusion may be formed on one of the cylinder body and the support plate, and an embedding hole or embedding groove may be formed on the other side for the embedding protrusion to be inserted and combined. Thus, the cylinder body and the support plate can be combined more simply and firmly.

[0029] In order to achieve the purpose of the present invention, a reciprocating compressor including a housing, a drive motor, a drive shaft, a piston, a cylinder body and a support plate can be provided. The drive motor can be arranged inside the housing and can have a stator and a rotor. The drive shaft can be combined with the rotor of the drive motor. The piston can be combined with the drive shaft and reciprocate. The cylinder body can have a cylinder portion and a bearing portion, the piston is inserted into the cylinder portion in a reciprocating manner to form a compression chamber, and the drive shaft passes through the bearing portion so that the bearing portion supports the drive shaft in the radial direction. The support plate can be arranged between the drive motor and the cylinder body, and the cylinder body can be supported to the drive motor along the axial direction of the drive shaft. Thus, the weight of the cylinder body can be reduced to make the compressor lightweight and / or miniaturized, and the right angle and roundness of the bearing portion and the cylinder portion can be ensured to improve reliability.

[0030] Here, the support plate may include a cylinder body support surface portion and a plurality of cylinder body support protrusions. The cylinder body may be placed on the cylinder body support surface portion and supported along the axial direction of the drive shaft. The plurality of cylinder body support protrusions may be bent from the cylinder body support surface portion toward the stator and placed on the stator, respectively, and supported along the axial direction of the drive shaft. Thus, by making the support plate into sheet metal, not only can the support plate be manufactured simply, but also the weight of the support plate can be reduced.

[0031] As an example, the cylinder body support surface portion may be formed to be open to the surface facing the cylinder portion and have an arc shape at both ends. Thus, by thinning the cylinder body by an amount corresponding to the overlap between the cylinder portion and the cylinder body support surface portion, the weight of the cylinder body can be further reduced.

[0032] Specifically, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the plurality of cylinder body supporting protrusions can be formed symmetrically with respect to the first center line, and can be formed asymmetrically with respect to the second center line. Thus, as a part of the cylinder body supporting protrusion is bent toward the housing, the assembly work of the support plate can be simplified.

[0033] In addition, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the plurality of cylinder body supporting protrusions can be formed symmetrically with respect to the first center line and the second center line, respectively. Thus, as the supporting lengths of the cylinder body supporting protrusions are formed to be the same, the stability of the cylinder body can be improved.

[0034] As an example, the stator may be formed into a polyhedral shape having a plurality of corners when projected along the axial direction of the drive shaft. The plurality of cylinder body support protrusions may be bent from the corners of the cylinder body support surface portion and respectively placed on the surfaces corresponding to the corners in the axial side surface of the stator, and supported along the axial direction of the drive shaft. Thus, as the plurality of cylinder body support protrusions are arranged radially and widely from the center of the frame portion, the support force of the support plate is evenly distributed, so that the cylinder body can be stably supported.

[0035] As another example, at least one of the plurality of cylinder body supporting protrusions may be formed by bending between two adjacent corners of the cylinder body supporting surface. Thus, by reducing the number of cylinder body supporting protrusions, the weight of the support plate can be reduced accordingly while reducing the number of assembly steps.

[0036] For example, when the center line of the reciprocating direction of the piston is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, the plurality of cylinder body supporting protrusions may be formed so that at least one is located on the first center line. Thus, the supporting force on the cylinder body can be increased while reducing the number of cylinder body supporting protrusions.

[0037] Specifically, the stator may be formed into a polyhedral shape having a plurality of corners when projected in the axial direction of the drive shaft. A plate support protrusion protruding toward the radial outside may be formed between the corners of the stator that are adjacent to each other, so that at least one of the plurality of cylinder body support protrusions is placed on the plate support protrusion and supported in the axial direction of the drive shaft. In this way, the support area of ​​the support plate can be stably ensured while minimizing the volume of the stator.

[0038] In addition, a first extension portion extending radially outward may be formed between the two ends of the cylinder body support surface portion. The cylinder body support protrusion supported by the plate support protrusion may be formed by bending from the first extension portion. Thus, the area of ​​the support plate in the reciprocating direction of the piston can be reduced to reduce the weight of the compression portion including the support plate.

[0039] In addition, a second extension portion extending radially outward may be formed at each end of the cylinder body support surface portion. The cylinder body support protrusion supported on the corner of the stator may be formed by bending from the second extension portion. Thus, the area of ​​the support plate in the direction orthogonal to the reciprocating direction of the piston can be reduced to reduce the weight of the compression portion including the support plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a perspective view showing the interior of the reciprocating compressor of this embodiment through the outer shell.

[0041] Figure 2 It is shown Figure 1 A cross-sectional view of the interior of a reciprocating compressor.

[0042] Figure 3 This is a perspective view showing an exploded view of the compressor body of the present embodiment.

[0043] Figure 4 Yes Figure 3 The compressor body is assembled and shown in a perspective view.

[0044] Figure 5 yes Figure 4 main view.

[0045] Figure 6 yes Figure 4 Side view of.

[0046] Figure 7 yes Figure 4 Top view of the .

[0047] Figure 8 yes Figure 7 “Ⅸ-Ⅸ” line cross-sectional view.

[0048] Fig. 91 is a perspective view showing another embodiment of the support plate of the present embodiment.

[0049] Fig.10 yes Fig. 9 main view.

[0050] Fig.11 1 is a perspective view showing still another embodiment of the support plate of this embodiment.

[0051] Fig.12 yes Fig.11 main view.

[0052] Fig.13 1 is an exploded perspective view showing still another embodiment of the support plate of the present embodiment.

[0053] Fig.14 yes Fig.13 Assembly stereogram of .

[0054] Fig.15 yes Fig.14 main view.

[0055] Fig.16 1 is a perspective view showing still another embodiment of the support plate of this embodiment.

[0056] Fig.17 yes Fig.16 main view. DETAILED DESCRIPTION

[0057] Hereinafter, the reciprocating compressor of the present invention will be described in detail based on an embodiment shown in the accompanying drawings. Generally, a reciprocating compressor can be divided into an upper compression or a lower compression according to the position of the compression part. The upper compression is a method in which the compression part is located at a position higher than the electric part, and the lower compression is a method in which the compression part is located at a position lower than the electric part. Hereinafter, the description will be centered on the reciprocating compressor of the upper compression method, but the same can also be applied to the reciprocating compressor of the lower compression method.

[0058] In addition, the following description will be made with the piston as the center, the compression chamber side as the front, and the opposite side as the rear. In addition, the description will be made with the electric part as the center, the compression chamber side as the upper side, and the opposite side as the lower side.

[0059] Figure 1 1 is a perspective view showing the housing of the reciprocating compressor of this embodiment and the interior thereof. Figure 2 It is shown Figure 1 A cross-sectional view of the interior of a reciprocating compressor.

[0060] Reference Figure 1 and Figure 2The reciprocating compressor of this embodiment may include: a shell 110, which forms an appearance; an electric part 120, which is arranged in the internal space 110a of the shell 110 and provides a driving force; a compression part 130, which receives the driving force from the electric part 120 to compress the refrigerant; a suction and discharge part 140, which guides the refrigerant to the compression chamber and discharges the compressed refrigerant; and a support part 150, which supports the compressor body C including the electric part 120 and the compression part 130 on the shell 110.

[0061] The housing 110 includes a lower housing 111 and an upper housing 112. The lower housing 111 and the upper housing 112 may be combined to form a closed internal space 110a. The electric part 120 and the compression part 130 may be accommodated in the internal space 110a of the housing 110. The housing 110 may be made of an aluminum alloy (hereinafter referred to as aluminum) which is lightweight and has high thermal conductivity.

[0062] The lower housing 111 may be formed in a substantially hemispherical shape. The suction pipe 115, the discharge pipe 116, and the process pipe (not shown) may be respectively connected to the lower housing 111 through penetration. The suction pipe 115, the discharge pipe 116, and the process pipe (not shown) may be respectively connected to the lower housing 111 through an insert die-casting process.

[0063] The upper housing 112 may be formed in a substantially hemispherical shape similar to the lower housing 111. The upper housing 112 may be combined with the lower housing 111 at the upper side of the lower housing 111 to form the internal space 110a of the housing 110 described above.

[0064] In addition, the upper housing 112 and the lower housing 111 may be joined by welding, but in the case where the lower housing 111 and the upper housing 112 are formed of an aluminum material that is difficult to weld, they may be fastened by bolts.

[0065] Reference Figure 1 and Figure 2 The electric part (or driving motor) 120 of this embodiment may include a stator 121 and a rotor 122. The stator 121 may be elastically supported in the inner space 110a of the housing 110, that is, the bottom surface of the lower housing 111, and the rotor 122 may be rotatably disposed inside the stator 121.

[0066] The stator 121 may include a stator core 1211 and a stator coil 1212 .

[0067] The stator core 1211 is made of a metal material such as an electrical steel plate, and when a voltage is applied to the electric unit 120 from the outside, the stator core 1211 performs electromagnetic interaction due to electromagnetic force together with a stator coil 1212 and a rotor 122 described later.

[0068] The stator core 1211 is formed into a substantially quadrilateral cylinder and / or a hollow hexahedron. For example, the inner circumference of the stator core 1211 may be formed into a circular shape, while the outer circumference thereof may be formed into a substantially quadrilateral shape. The stator core 1211 may be combined with a support plate 133 described later through a stator fastening member 1215 and elastically supported on the housing 110.

[0069] In other words, first fastening holes 1211a are formed at the corners of the stator core 1211, respectively, and penetrate in the axial direction of the drive shaft 125. Stator fastening members 1215 for fastening the respective lifting portions 1336 of the support plate 133 described later to the stator core 1211 can be inserted into the respective first fastening holes 1211a. In this case, the stator fastening member 1215 can penetrate the first fastening holes 1211a and be fastened to the fourth fastening holes 1332a of the lifting portions 1336 described later, or can penetrate the first fastening holes 1211a and the fourth fastening holes 1332a continuously and be fastened from one side (upper side) of the lifting portions 1336 facing away from the stator core 1211 using a nut or the like. The stator core 1211 will be described again later together with the support plate 133.

[0070] The stator core 1211 can be spaced apart from the inner surface of the housing 110 in the axial direction and radial direction of the drive shaft 125, and the lower end of the stator core 1211 is supported on the bottom surface of the housing 110 by a support spring 151 described later. This can prevent vibration generated during operation from being directly transmitted to the housing 110.

[0071] The stator coil 1212 may be wound inside the stator core 1211. As described above, when a voltage is applied from the outside, the stator coil 1212 generates electromagnetic force and performs electromagnetic interaction with the stator core 1211 and the rotor 122. Thus, the electric part 120 generates a driving force for reciprocating the compression part 130.

[0072] The rotor 122 includes a rotor core 1221 and a magnet 1222 .

[0073] The rotor core 1221 may be made of a metal material such as an electrical steel plate and may be formed into a substantially cylindrical shape, similarly to the stator core 1211 . The drive shaft 125 described below may be press-fitted into the center of the rotor core 1221 .

[0074] The magnets 1222 may be formed of permanent magnets and may be inserted and coupled to the rotor core 1221 at equal intervals in the circumferential direction of the rotor core 1221. When voltage is applied, the rotor 122 rotates by electromagnetic interaction with the stator core 1211 and the stator coil 1212. Thus, the drive shaft 125 transmits the rotational force of the electric part 120 to the compression part 130 via the connecting rod 126 while rotating together with the rotor 122.

[0075] Reference Figure 1 and Figure 2 The compression part 130 of this embodiment may include a piston 131, a cylinder body 132 and a support plate 133. The piston 131 is a member that is connected to the drive shaft 125 through the connecting rod 126 and reciprocates, the cylinder body 132 is a member into which the piston is inserted to reciprocate and form a compression chamber 130a, and the support plate 133 is a member that is disposed between the stator 121 and the cylinder body 132 and fixes the cylinder body 132 to the stator 121.

[0076] The piston 131 may have an opening on one side (rear side) facing the connecting rod 126, and the opposite side, that is, the side (front side) facing away from the connecting rod 126, may be flatly formed into a closed shape. Thus, the connecting rod 126 is inserted into the rear side of the piston 131 and rotatably coupled to the piston 131, and the front side of the piston 131 forms a compression chamber 130a inside the cylinder portion 1323 described later together with the valve assembly 141 described later.

[0077] The cylinder body 132 may include a frame portion 1321, a bearing portion 1322, and a cylinder portion (cylinder) 1323. The frame portion 1321 may connect the bearing portion 1322 and the cylinder portion 1323 and support the drive shaft 125 in the axial direction on the support plate 133 described later, the bearing portion 1322 may have a bearing hole 1322a and support the drive shaft 125 in the radial direction, and the cylinder portion 1323 may extend from the frame portion 1321 and form a compression chamber 130a together with the piston 131. Thus, the frame portion 1321 of the cylinder body 132 is formed to be thin and narrow, so that the volume of the cylinder body 132 can be reduced, and the weight of the compression portion 130 including the cylinder body 132 can be reduced. The cylinder body 132 will be described again later together with the support plate 133.

[0078] The support plate 133 may include a cylinder body support surface portion 1331 and a cylinder body support protrusion 1332. The cylinder body 132 may be placed on the cylinder body support surface portion 1331 and supported in the axial direction of the drive shaft 125, and the cylinder body support protrusion 1332 may extend from the cylinder body support surface portion and be placed on the stator core 1211 and supported in the axial direction of the drive shaft 125. Thus, as a part of the cylinder body 132 made of a casting is replaced with the support plate 133 processed by sheet metal, the weight of the cylinder body 132 including the support plate 133 can be reduced. The support plate 133 will be described again later together with the stator 121 and the cylinder body 132.

[0079] Reference Figure 1 and Figure 2The suction and discharge part 140 of this embodiment may include a valve assembly 141, a suction muffler 142, and a discharge muffler 143. The valve assembly 141 and the suction muffler 142 may be sequentially coupled to the open end of the cylinder part 1323.

[0080] The valve assembly 141 may include a valve plate 1411, an inlet valve 1412, a discharge valve 1414, a discharge valve stopper 1415, and a discharge cap 1416. Although not shown, in the valve assembly 141, gaskets (not shown) may be provided between the aforementioned components.

[0081] The valve plate 1411 may be formed in a substantially quadrilateral plate shape and is arranged to cover the front end surface of the cylinder body 132, that is, one side opening surface of the compression chamber 130a. For example, fastening holes (not marked with reference numerals) are formed at the corners of the valve plate 1411, so that bolts can be fastened to fastening grooves (not marked with reference numerals) provided at the front end surface of the cylinder body 132.

[0082] The valve plate 1411 may have both sides formed substantially flat and a suction port 1411a and a discharge port 1411b formed in the center, respectively. However, depending on the situation, a plurality of suction ports 1411a and / or discharge ports 1411b may be formed.

[0083] The suction valve 1412 may be formed as a quadrilateral plate body made of a thin elastic steel plate and may be arranged on the side facing the piston 131, that is, the rear side, with respect to the valve plate 1411. Thus, the suction valve 1412 may be bent toward the piston 131 to open and close the suction port 1411a.

[0084] The discharge valve 1414 may be formed as a long plate body made of a thin steel plate, and may be disposed on the front side of the valve plate 1411. Thus, the discharge valve 1414 may be bent in a direction away from the piston 131 to open and close the discharge port 1411b.

[0085] The discharge valve stopper 1415 may be formed as a rigid body, disposed between the discharge valve 1414 and the discharge cover 1416, and one end thereof may be in close contact with the discharge valve 1414, while the other end may be separated from the discharge valve 1414 by a preset interval. Thus, the discharge valve stopper 1415 may limit the opening of the discharge valve 1414 while pressing and fixing the discharge valve 1414 to the valve plate 1411.

[0086] The discharge cover 1416 is fastened to the front end surface of the cylinder body 132 via the valve plate 1411 and the suction valve 1412, and finally covers the compression chamber 130a. In other words, the discharge cover 1416 can also be called a cylinder cover. Thus, when the discharge valve 1414 is opened, the refrigerant discharged from the compression chamber 130a through the discharge port 1411b can move to the discharge muffler 143 through the discharge cover 1416.

[0087] Reference Figure 1 and Figure 2 The suction muffler 142 of this embodiment can be fixed by the valve assembly 141 and communicated with the suction port 1411a of the valve plate 1411. A suction space portion (not marked with a reference numeral) can be formed inside the suction muffler 142, the inlet of the suction space portion can be directly or indirectly communicated with the suction pipe 115, and the outlet of the suction space portion can be directly communicated with the suction side of the valve assembly 141. Thus, the suction muffler 142 transfers the refrigerant sucked through the suction pipe 115 to the compression chamber 130a of the cylinder portion 1323.

[0088] Reference Figure 1 and Figure 2 , the discharge muffler 143 of this embodiment can be provided separately from the cylinder body 132. A discharge space portion (not marked with a reference numeral) can be formed inside the discharge muffler 143, the inlet of the discharge space portion can be connected to the discharge side of the valve assembly 141 through the annular tube 118, and the outlet of the discharge space portion can be directly connected to the discharge pipe 116 through the annular tube 118. Thus, the discharge muffler 143 can attenuate the pressure pulsation of the refrigerant discharged from the compression chamber 130a, and discharge it to the outside of the compressor through the discharge pipe 116.

[0089] Reference Figure 1 and Figure 2 The support part 150 of this embodiment supports between the bottom surface of the electric part 120 and the bottom surface of the lower housing 111 opposite thereto, and generally supports the four corners of the electric part 120 on the housing 110. For example, the support part 150 may include a support spring 151, a first spring cap 152 supporting the lower end of the support spring 151, and a second spring cap 153.

[0090] The support spring 151 is composed of a compression coil spring, the first spring cap 152 is fixed to the bottom surface of the lower housing 111 and supports the lower end of the support spring 151, and the second spring cap 153 is fixed to the lower end of the electric part 120 and supports the upper end of the support spring 151. Thus, each support spring 151 is supported by the first spring cap 152 and the second spring cap 153, respectively, so that the compressor body C is elastically supported on the housing 110.

[0091] Reference numeral 1255 not described in the drawings is an oil supply device.

[0092] The reciprocating compressor of the present embodiment as described above operates in the following manner.

[0093] That is, when power is applied to the electric part 120, the rotor 122 rotates. When the rotor 122 rotates, the drive shaft 125 coupled to the rotor 122 rotates and transmits the rotational force to the piston 131 through the connecting rod 126. The piston 131 reciprocates in the compression chamber 130a in the front-rear direction through the connecting rod 126.

[0094] For example, if the piston 131 retreats in the compression chamber 130a (intake stroke), the volume of the compression chamber 130a increases. If the volume of the compression chamber 130a increases, the refrigerant filled in the suction muffler 142 is sucked into the compression chamber 130a of the cylinder portion 1323 through the suction valve 1412 of the valve assembly 141.

[0095] On the contrary, if the piston 131 moves forward in the compression chamber 130a (discharge stroke), the volume of the compression chamber 130a decreases. If the volume of the compression chamber 130a decreases, the refrigerant filled in the compression chamber 130a is compressed and discharged to the discharge chamber 1416a of the discharge cover 1416 through the discharge valve 1414 of the valve assembly 141. The refrigerant moves to the discharge space of the discharge muffler 143 through the annular pipe 118, and then is discharged to the refrigeration cycle through the annular pipe 118 and the discharge pipe 116, and the above series of processes are repeated.

[0096] Here, as described above, the compression part 130 is combined with the electric part 120 and together with the electric part 120, constitutes the compressor body C, and is elastically supported by the support part 150 including the support spring 151. Thus, by reducing the weight of the electric part 120 and / or the compression part 130, the weight of the compressor body C is reduced, which is not only conducive to the miniaturization and / or lightweight of the compressor, but also can reduce the vibration of the compressor, which is conducive to high-load operation (high-pressure and / or high-speed operation).

[0097] Therefore, in the present embodiment, by reducing the volume of the cylinder body constituting a part of the compression section, the compressor body and the reciprocating compressor including the same can be made smaller and / or lighter.

[0098] Figure 3 1 is a perspective view showing the compressor body of this embodiment in an exploded manner. Figure 4 Yes Figure 3 The compressor body is assembled and shown in a perspective view, Figure 5 yes Figure 4 The main view, Figure 6 yes Figure 4 Side view of Figure 7 yes Figure 4 A top view of Figure 8 yes Figure 7 “Ⅸ-Ⅸ” line cross-sectional view.

[0099] Reference Figures 3 to 8 As described above, the compression part of the present embodiment may include a piston 131, a cylinder body 132, and a support plate 133. The piston 131 may be combined with the drive shaft 125 through the connecting rod 126 and slidably inserted into the cylinder part 1323, the cylinder body 132 may be combined with the support plate 133 and supported along the axial direction of the drive shaft 125, and the support plate 133 may be combined with the stator 121 and supported along the axial direction of the drive shaft 125. Thus, the cylinder body 132 is combined with the stator 121 through the support plate 133, so that it can be elastically supported on the housing 110.

[0100] For example, the cylinder body 132 may be made of a casting. In other words, the cylinder body 132 may be formed as a single body by making the frame portion 1321, the bearing portion 1322, and the cylinder portion 1323 described later of a casting. Thus, the roundness of the bearing portion 1322 and the cylinder portion 1323 can be ensured while ensuring the right angle between the bearing portion 1322 and the cylinder portion 1323. Thus, the drive shaft 125 can be stably supported while the movement of the piston 131 is stabilized.

[0101] Specifically, as described above, the cylinder body 132 of the present embodiment may include a frame portion 1321, a bearing portion 1322, and a cylinder portion (or cylinder) 1315. The frame portion 1321 may extend in a lateral direction orthogonal to the axial direction of the drive shaft 125, the bearing portion 1322 may extend from the center of the frame portion 1321 in the axial direction of the drive shaft 125, and the cylinder portion 1323 may extend from one side of the frame portion 1321 in the radial direction of the drive shaft 1215.

[0102] The frame portion 1321 may be formed in a flat plate shape extending in the radial direction (lateral direction) of the drive shaft 1215, or may be formed in a radial plate shape by weight reduction processing of a portion of the edge except the corners. For example, the frame portion 1321 may be formed in a radial plate shape in which the corner portions extend radially and long, and second fastening holes 1321a may be formed at the corners of the frame portion 1321. The second fastening hole 1321a and the third fastening hole 1331a of the cylinder body support surface 1331 described later provided on the support plate 133 may be formed by penetrating along the axial direction of the drive shaft 125 on the same axis. Thus, the frame portion 1321 may be fastened by a cylinder body fastening member 135 such as a bolt and / or a rivet penetrating the second fastening hole 1321a and the third fastening hole 1331a in a state where it is placed on the cylinder body support surface 1331 described later. Thus, even if the cylinder body 132 and the support plate 133 are separated and assembled later, the assembly work of the cylinder body 132 and the support plate 133 can be simplified.

[0103] In addition, the frame portion 1321 can be formed to have substantially the same thickness except for the portion forming the cylinder portion 1323. In other words, the corner portion of the frame portion 1321 fastened to the support plate 133 can be formed to have a substantially flat plate shape. Thus, by reducing the overall volume of the cylinder body 132 including the frame portion 1321, the overall weight of the cylinder body 132 made of a casting can be reduced.

[0104] The bearing portion 1322 may be formed to extend from the central portion of the frame portion 1321 in the axial direction of the driving shaft 125. In other words, the bearing portion 1322 may be long extended toward the electric part 120 to overlap with the stator coil 1212 in the radial direction.

[0105] In addition, the bearing hole 1322a can penetrate the bearing portion 1322 in the axial direction of the drive shaft 125 so that the interior of the bearing portion 1322 is formed into a hollow shape. The drive shaft 125 can be supported in the axial direction at the upper end of the bearing portion 1322, and the supported portion 1252 of the drive shaft 125 can be supported in the radial direction of the drive shaft 1215 at the inner circumferential surface of the bearing portion 1322. Thus, the drive shaft 125 can be supported in the axial direction and radial direction of the drive shaft 1215 by the cylinder body 132.

[0106] The cylinder portion 1323 may be formed to extend from one side edge of the frame portion 1321 in the radial direction of the drive shaft 1215. In other words, the cylinder portion 1323 may extend from the frame portion 1321 as a single body and may be formed eccentrically from the center of the frame portion 1321 toward the radial direction of the drive shaft 1215.

[0107] In addition, the cylinder portion 1323 can penetrate in the radial direction of the drive shaft 1215, and the piston 131 connected to the connecting rod 126 can be inserted into the inner opening end, and the valve assembly 141 constituting the suction and discharge portion 140 described later can be installed at the outer opening end. Thus, the cylinder portion 1323 can be formed thicker than the frame portion 1321.

[0108] As described above, the support plate 133 of the present embodiment can be assembled after being manufactured separately from the cylinder body 132. Thus, the support plate 133 can be formed of various materials and / or shapes. For example, the support plate 133 and the cylinder body 132 can be made of the same material, or they can be made of different heterogeneous materials. In other words, the cylinder body 132 can be made of cast iron, and conversely, the support plate 133 can also be made of an aluminum alloy that is lighter than cast iron. In the case where the support plate 133 is made of a material that is lighter than the cylinder body 132, the weight of the compression portion including the cylinder body 132 and the support plate 133 can be further reduced.

[0109] In addition, although the support plate 133 can be made of a casting, it can also be formed by sheet metal processing. In this embodiment, an example in which the support plate 133 is made by sheet metal processing will be mainly described. When the support plate 133 is sheet metal processed, the processing of the support plate 133 can be further simplified.

[0110] For example, the support plate 133 can be formed by bending a plate having the same thickness into a specified shape. In other words, the cylinder body support convex portion 1332 described later can be formed to have the same thickness as the cylinder body support surface portion 1331. Thereby, not only can the shape of the cylinder body 132 be simplified, but also the volume of the cylinder body 132 can be reduced, so that the weight of the compression portion 130 can be reduced as a whole.

[0111] Specifically, the support plate 133 may include a cylinder body support surface portion (or a first cylinder body support portion) 1331 and a plurality of cylinder body support convex portions (or a second cylinder body support portion) 1332. The cylinder body support surface portion 1331 is a portion on which the cylinder body 132 is placed and axially supported along the drive shaft 125, and the plurality of cylinder body support convex portions 1332 are portions whose ends are placed on the axial side surface (hereinafter, also referred to as the upper side surface) of the stator core 1211 and are supported. Thereby, the support plate 133 can form a part of the compression portion 130 and be disposed between the compression portion 130 and the electric portion 120, for example, between the cylinder body 132 and the stator 121, and can couple the cylinder body 132 to the stator 121.

[0112] The cylinder body support surface portion 1331 can be formed into various shapes. However, in this embodiment, when the cylinder body support surface portion 1331 is projected along the axial direction of the drive shaft 125, it can be formed into a "匚" shape or a similar character shape. In other words, the cylinder body support surface portion 1331 of this embodiment can be formed into an arc shape with two ends by bending twice in the circumferential direction. Thereby, a bearing accommodation portion 1331b penetrating axially along the drive shaft 125 can be formed in the central portion of the cylinder body support surface portion 1331 to surround and accommodate the bearing portion 1322 of the cylinder body 132, and a cylinder accommodation portion 1331c opening radially can be formed on one side of the bearing accommodation portion 1331b to accommodate the cylinder portion 1323. Thereby, the cylinder body support surface portion 1331 overlaps with the cylinder portion 1323 along the axial direction of the drive shaft 125, making the frame portion 1321 of the cylinder body 132 described later thinner, so that the volume of the cylinder body 132 can be further reduced.

[0113] The cylinder body support surface portion 1331 may be formed so that at least a portion thereof overlaps with the stator coil 1212 of the stator 121 in the axial direction of the drive shaft 125. In other words, the inner circumferential surface of the cylinder body support surface portion 1331 may be formed so as to be located within the radial range of the stator coil 1212. Thus, by appropriately ensuring the width of the cylinder body support surface portion 1331, deformation of the cylinder body support surface portion 1331 may be suppressed.

[0114] The cylinder body support surface portion 1331 may be formed with a third fastening hole 1331a corresponding to the second fastening hole 1321a of the cylinder body 132. In other words, a third fastening hole 1331a penetrating along the axial direction of the drive shaft 125 and located on the same axis as the second fastening hole 1321a may be formed at the corner of the cylinder body support surface portion 1331. Thus, the cylinder body support surface portion 1331 may be firmly coupled to the frame portion 1321 of the cylinder body 132 by the cylinder body fastening member 135 inserted into the second fastening hole 1321a and the third fastening hole 1331a.

[0115] Although not shown, any side of the second fastening hole 1321a and the third fastening hole 1331a may also be formed as a calking protrusion (not shown), which is inserted into the facing fastening hole (or fastening groove, not shown) for calking and combining. This will be described again in other embodiments later.

[0116] In addition, a stopper protrusion 1333 may be formed on the cylinder body support surface portion 1331 in the axial direction of the drive shaft 125, and the stopper protrusion 1333 supports the cylinder body 132 in the radial direction of the drive shaft 1215. The stopper protrusion 1333 may be formed by bending from the inner peripheral surface of the bearing accommodation portion 1331b to the opposite side of the electric part 120, and may be formed so that when projected along the axial direction of the drive shaft 125, at least a portion of the stopper protrusion 1333 is located on the first center line CL1 line passing through the center of the cylinder part 1323. Thus, the force transmitted to the cylinder body 132 when the piston 131 retreats (intake stroke) can be attenuated, so that the cylinder body 132 can be stably supported.

[0117] For example, the stop protrusion 1333 may be formed in a flat plate shape extending in the axial direction of the drive shaft 125. Figure 8 As shown, the cylinder portion 1323 of the cylinder body 132 may also be It is formed by being bent in a U shape. In this case, the stopper convex portion 1333 can support one side surface (upper side surface) of the frame portion 1321 along the axial direction of the drive shaft 125. Thus, the frame portion 1321 of the cylinder barrel 132 is supported by the stopper convex portion 1333 along the radial and axial directions of the drive shaft 1215, so that the cylinder barrel 132 and the support plate 133 can be more firmly combined. In other words, as the stopper convex portion 1333 supports the cylinder barrel 132 along the reciprocating direction of the piston 131, it is possible to prevent the cylinder barrel 132 from being pushed away from the support plate 133 due to the repeated reciprocating motion of the piston 131, and thus the cylinder barrel 132 can be more stably supported in the radial and / or axial directions.

[0118] Each of the plurality of cylinder barrel support convex portions 1332 of the present embodiment can be formed by bending from each of the respective corners of the cylinder barrel support surface portion 1331 formed in a U shape toward the stator core 1211. For example, when the center line of the reciprocating direction of the piston 131 is taken as the first center line CL1 and the center line passing through the axis Os of the drive shaft 125 and orthogonal to the first center line CL1 is taken as the second center line CL2, the plurality of cylinder barrel support convex portions 1332 can be respectively formed at positions symmetric with each other with respect to the first center line CL1 and at positions symmetric with each other with respect to the second center line CL2. In other words, the plurality of cylinder barrel support convex portions 1332 can be formed to be respectively arranged at positions spaced apart from the center (for example, the axis) Os of the frame portion 1321 by the same or substantially similar distances in all directions. Thus, as the plurality of cylinder barrel support convex portions 1332 are radially arranged around the center of the frame portion 1321, the support force of the support plate 133 is evenly distributed, and thus the cylinder barrel 132 can be stably supported. In addition, as the cylinder barrel support convex portions 1332 are arranged as wide as possible on the cylinder barrel support surface portion 1331, the cylinder barrel 132 can be stably supported.

[0119] Specifically, each of the plurality of cylinder barrel support convex portions 1332 can include a bent portion 1335 and a lifting portion 1336. The bent portion 1335 is the portion bent for the first time from the cylinder barrel support surface portion 1331, and the lifting portion 1336 is the portion bent for the second time from the bent portion 1335. In other words, the cylinder barrel support convex portion 1332 can be bent in two stages from the cylinder barrel support surface portion 1331, and when viewed in a front projection, it can be formed into a U-shaped cross-sectional shape. Thus, by ensuring a relatively large area of the cylinder barrel support convex portion 1332 in contact with the axial side surface (upper side surface) of the stator core 1211, the cylinder barrel 132 can be stably supported.

[0120] One end of a plurality of bent portions 1335 can be bent along the axial direction (or longitudinal direction) of the drive shaft 125 from the outer peripheral surface of the cylinder body support surface portion 1331. In other words, the bent portions 1335 can be bent at a right angle from each corner including both ends of the cylinder body support surface portion 1331 formed in a "C" shape toward the axial side surface (upper side surface) of the stator core 1211. As a result, the cylinder body support surface portion 1331 can be located above the stator coil 1212, and accordingly, the volume of the support plate 133 can be reduced.

[0121] The height of the bent portion 1335 can be formed to be slightly greater than the height at which the stator coil 1212 protrudes from the axial side surface (upper side surface) of the stator core 1211. In other words, the bent portion 1335 can be formed such that the cylinder body support surface portion 1331 is slightly spaced apart from the stator coil 1212 in a state where the later-described lifting portion 1336 is disposed on the axial side surface (upper side surface) of the stator core 1211. Thus, by minimizing the height of the bent portion 1335, even when the cylinder body 132 is disposed on the cylinder body support surface portion 1331, it is possible to effectively suppress the bent portion 1335 from being bent.

[0122] In addition, at least one or more reinforcing ribs 1337 can be formed at a portion of the bent portion 1335 that is bent from the cylinder body support surface portion 1331. For example, a first bent line 1335a bent from the cylinder body support surface portion 1331 and a second bent line 1335b bent from the lifting portion 1336 can be respectively formed at both ends of the bent portion 1335, and the aforementioned reinforcing ribs 1337 can be formed at the first bent line 1335a and / or the second bent line 1335b. The reinforcing ribs 1337 can be formed by post-assembling an additional member by welding or the like, but as shown in Figure 5 It can be formed by being embedded inward from the first bent line 1335a and / or the second bent line 1335b. In the present embodiment, an example in which the reinforcing rib 1337 is formed at the first bent line 1335a is shown, but the reinforcing rib 1337 can be similarly formed at the second bent line 1335b. Thus, even when the cylinder body support convex portion 1332 including the bent portion 1335 is bent from the cylinder body support surface portion 1331, the rigidity of the cylinder body support convex portion 1332 can be increased to more stably support the cylinder body 132.

[0123] Although not shown, a plurality of bent portions 1335 can also be respectively bent two or more times to be formed. In other words, a plurality of bent portions 1335 can be bent into multiple segments to be formed. In this case, the reinforcing ribs 1337 can also be formed at each bent portion.

[0124] As described above, the plurality of lifting portions 1336 can be formed by bending from the other end of each bent portion 1335 along the axial side surface (upper side surface) (laterally) of the stator core 1211. For example, the plurality of lifting portions 1336 can be formed by bending from each bent portion 1335 in the same direction as the reciprocating direction of the piston 131. Thus, by simplifying the bending operation of the lifting portions 1336, the workability of the support plate 133 including the lifting portions 1336 can be improved.

[0125] Specifically, the plurality of supporting portions 1336 may be formed by bending symmetrically with respect to the first center line CL1, and may be formed by bending asymmetrically with respect to the second center line CL2. In other words, the first supporting portion 1336a located on the cylinder portion 1323 side with respect to the second center line CL2 among the plurality of supporting portions 1336 may be bent toward the inner peripheral surface of the housing 110, and the second supporting portion 1336b located on the opposite side of the cylinder portion 1323 may be bent to face away from the inner peripheral surface of the housing 110. Thus, in the case of the first supporting portion 1336a located on the cylinder portion 1323 side, even if the cylinder portion 1323 is formed around it, the fastening of the first supporting portion 1336a may be simplified.

[0126] In addition, the cylinder body support surface 1331 is extended long toward the opposite side of the cylinder portion 1323, so that the frame portion 1321 placed on the cylinder body support surface 1331 can also be formed long toward the opposite side of the cylinder portion 1323. Figure 5 As shown, with the axis Os as a reference, the second support length L2 to the second support portion 1336b can be longer than the first support length L1 to the first support portion 1336a. As a result, the support point supporting the cylinder body 132 on the opposite side of the cylinder portion 1323 relative to the axis Os of the drive shaft 125 becomes farther, so that even if the center of gravity of the cylinder body 132 is biased toward the cylinder portion 1323 side, the overturning moment of the cylinder body 132 can be reduced.

[0127] In this case, the plurality of supporting parts 1336 may be respectively formed with fourth fastening holes 1332a penetrating along the axial direction of the driving shaft 125. The fourth fastening hole 1332a may be formed on the same axis as the first fastening hole 1211a of the stator core 1211. Thus, the plurality of supporting parts 1336 may be coupled to the stator core 1211 using a long stator fastening member (e.g., a fastening bolt and / or a fastening rivet) 1215 passing through the first fastening hole 1211a and the fourth fastening hole 1332a. Thus, by simplifying the assembly operation of the support plate 133 and the stator 121, the manufacturing process can be reduced.

[0128] As described above, when the cylinder body 132 constituting a part of the compression part 130 is coupled to the stator 121 by the support plate 133 made of sheet metal, the weight of the compression part 130 can be reduced as a whole by reducing the volume of the cylinder body 132. This not only contributes to the lightweight of the compressor body C, but also reduces the load of the support part 150 supporting the compressor body C, which contributes to the miniaturization of the compressor. In addition, by reducing the vibration generated when the compressor is running, it can be operated in various regions including high-load operation.

[0129] In addition, since the cylinder body 132 is coupled to the stator 121 using the support plate 133 made of sheet metal, the portion made of casting can be minimized, so that the cylinder body 132 including the cylinder portion 1323 can be easily manufactured while being lightweight.

[0130] In addition, as the cylinder body 132 is coupled to the stator 121 using the post-assembled support plate 133 , the cylinder body 132 can be stably coupled to the stator 121 while excluding the fixing protrusions in the cylinder body 132 for fixing the cylinder body 132 to the stator 121 .

[0131] In addition, as a cylinder body fastening member 135 such as bolts and / or rivets is used to respectively fasten the cylinder body 132 and the support plate 133 and / or the stator 121 and the support plate 133, a separate support plate 133 is provided between the cylinder body 132 and the stator 121, and the cylinder body 132 can also be easily assembled to the stator 121.

[0132] In addition, as the cylinder body 132 is combined with the stator 121 using the support plate 133, and in the cylinder body 132, the bearing portion 1322 and the cylinder portion 1323 are formed as a single body, the roundness of the bearing portion 1322 and the cylinder portion 1323 can be ensured while maintaining the right angle between the bearing portion 1322 and the cylinder portion 1323, thereby improving the compression efficiency and / or reliability.

[0133] On the other hand, another embodiment of the support plate will be described below.

[0134] That is, in the aforementioned embodiment, the supporting portion of the support plate located on the cylinder side of the cylinder body is bent toward the inner circumferential surface of the outer shell, but depending on the situation, the supporting portion of the support plate located on the cylinder side of the cylinder body can also be bent in the direction away from the inner circumferential surface of the outer shell.

[0135] Fig. 9 is a perspective view showing another embodiment of the support plate of the present embodiment, Fig.10 yes Fig. 9 main view.

[0136] Reference Fig. 9 and Fig.10 The compression part 130 including the support plate 133 in this embodiment is substantially similar to the compression part 130 in the foregoing embodiment in terms of the basic structure and its function and effect. For example, the compression part 130 may include a piston 131, a cylinder body 132, and a support plate 133. The cylinder body 132 may be coupled to the stator 121 through the support plate 133 and supported along the axial direction of the drive shaft 125. Thus, by reducing the volume of the cylinder body 132, the weight of the cylinder body 132 and the compression part 130 including the same can be reduced.

[0137] The cylinder body 132 may include a frame part 1321, a bearing part 1322, and a cylinder part 1323. These frame part 1321, bearing part 1322, and cylinder part 1323 may be made of castings and formed as a single body. Thus, roundness can be ensured while maintaining the perpendicularity of the bearing part 1322 and the cylinder part 1323 of the cylinder body 132 in this embodiment.

[0138] In addition, the support plate 133 may include a cylinder body support surface part 1331 and a plurality of cylinder body support convex parts 1332. These cylinder body support surface part 1331 and cylinder body support convex parts 1332 may be made of sheet metal and formed as a single body. For example, the cylinder body support surface part 1331 may be formed in a substantially "C" shape, and the plurality of cylinder body support convex parts 1332 may be respectively formed by bending from the corners including both ends of the cylinder body support surface part 1331 toward the stator 121.

[0139] The plurality of cylinder body support convex parts 1332 may include: a plurality of bending parts 1335, respectively bent from the cylinder body support surface part 1331 toward the axial side surface (upper side surface) of the stator 121; and a plurality of lifting parts 1336, respectively bent along the axial side surface of the stator 121 from the plurality of bending parts 1335. Thus, even if the support plate 133 is made of sheet metal, the cylinder body 132 can be stably supported on the stator 121.

[0140] However, in this embodiment, among the plurality of lifting parts 1336, the lifting part 1336 on the side of the cylinder part 1323, that is, Figure 7 taking the second center line CL2 as a reference, the first lifting part 1336a on the side of the cylinder part 1323 can be bent in a direction away from the inner peripheral surface of the housing 110. Thus, among the plurality of cylinder body support convex parts 1332 bent on the side of the cylinder part 1323 among the plurality of cylinder body support convex parts 1332 extending from the cylinder body support surface part 1331, the cylinder body support convex part 1332 bent on the side of the cylinder part 1323 is farther from the center of the cylinder body 132, that is, the second center line (or axis) CL2, than the cylinder body support convex part 1332 bent on the side of the cylinder part 1323 in the Figure 3 embodiment described above.

[0141] As described above, when the first lifting portion 1336a located on the cylinder portion 1323 side of the plurality of lifting portions 1336 is bent in a direction away from the inner circumferential surface of the housing 110, the plurality of bending portions 1335 can be bent as close to the front end surface side of the cylinder portion 1323 as possible. Fig.10 As shown, with the axis Os as the reference, the first support length L1 to the first supporting portion 1336a can be lengthened, while the second support length L2 to the second supporting portion 1336b can be shortened. As a result, the center of the cylinder body supporting surface portion 1331 moves toward the cylinder portion 1323, thereby more stably supporting the relatively heavy cylinder portion 1323 in the cylinder body 132.

[0142] In this case, the lifting portion 1336 located on the opposite side of the cylinder portion 1323 among the plurality of lifting portions 1336, in other words, the second lifting portion 1336b located on the opposite side of the cylinder portion 1323, based on the second center line CL2, can be bent toward the inner circumferential surface of the housing 110. Thus, the geometric center of the support plate 133 can be moved toward the cylinder portion 1323 while maintaining the lateral length of the cylinder body support surface portion 1331, so that the cylinder body 132 can be stably supported while maintaining the weight of the support plate 133.

[0143] On the other hand, another embodiment of the support plate will be described below.

[0144] That is, in the aforementioned embodiments, the supporting portions of the support plate are bent in the same direction, but depending on circumstances, the supporting portions of the support plate may also be bent in different directions.

[0145] Fig.11 is a perspective view showing another embodiment of the support plate of this embodiment, Fig.12 yes Fig.11 main view.

[0146] Reference Fig.11 and Fig.12 The compression part 130 including the support plate 133 of this embodiment is substantially similar to the basic structure and function of the compression part 130 of the aforementioned embodiment. For example, the compression part 130 may include a piston 131, a cylinder body 132 and a support plate 133, and the cylinder body 132 may be coupled to the stator 121 through the support plate 133 and supported along the axial direction of the drive shaft 125. Thus, by reducing the volume of the cylinder body 132, the weight of the cylinder body 132 and the compression part 130 including the cylinder body 132 may be reduced.

[0147] The cylinder body 132 may include a frame portion 1321, a bearing portion 1322, and a cylinder portion 1323. These frame portion 1321, bearing portion 1322, and cylinder portion 1323 may be made of castings and formed as a single body. Thereby, roundness can be ensured while maintaining the perpendicularity between the bearing portion 1322 and the cylinder portion 1323 of the cylinder body 132 of the present embodiment.

[0148] In addition, the support plate 133 may include a cylinder body support surface portion 1331 and a plurality of cylinder body support convex portions 1332. These cylinder body support surface portion 1331 and cylinder body support convex portions 1332 may be made of sheet metal and formed as a single body. For example, the cylinder body support surface portion 1331 may be formed in a substantially "C" shape, and the plurality of cylinder body support convex portions 1332 may be respectively formed by bending from the edges including both ends of the cylinder body support surface portion 1331 toward the stator 121.

[0149] The plurality of cylinder body support convex portions 1332 may include: a plurality of bending portions 1335 respectively bent from the cylinder body support surface portion 1331 toward the axial side surface (upper side surface) of the stator 121; and a plurality of lifting portions 1336 respectively bent from the plurality of bending portions 1335 along the axial side surface of the stator 121. Thereby, even if the support plate 133 is made of sheet metal, the cylinder body 132 can be stably supported on the stator 121.

[0150] However, in the present embodiment, the plurality of lifting portions 1336 may be Figure 7 symmetrically formed with respect to the second center line CL2 in

[0151] and the plurality of lifting portions 1336 are respectively bent in a direction away from the inner peripheral surface of the housing 110. In other words, with the second center line (or axis) CL2 as a reference, the first lifting portion 1336a located on the cylinder portion 1323 side and the second lifting portion 1336b located on the opposite side of the cylinder portion 1323 are respectively bent in a direction away from the inner peripheral surface of the housing 110. Thereby, among the plurality of cylinder body support convex portions 1332 extending from the cylinder body support surface portion 1331, the cylinder body support convex portions 1332 bent from the cylinder portion 1323 side and the cylinder body support convex portions 1332 bent from the opposite side of the cylinder portion 1323 are both located at positions away from the second center line (or axis) CL2. Fig.12As shown, with the axis Os as a reference, the first support length L1 to the first supporting portion 1336a and the second support length L2 to the second supporting portion 1336b can be lengthened toward both sides. As a result, the length of the cylinder body supporting surface portion 1331 is lengthened, so that the supporting force on the cylinder body 132 is correspondingly formed wider, and then the overturning moment of the cylinder body 132 can be reduced, and the cylinder body 132 can be supported more stably.

[0152] Although not shown, the plurality of lifting portions 1336 may be bent toward the inner circumferential surface of the housing 110. In this case, the plurality of bent portions 1335 may be bent from the cylinder body support surface portion 1331 at a position as close as possible to the second center line CL2. Thus, the length of the cylinder body support surface portion 1331 is shortened to a minimum, thereby correspondingly reducing the weight of the support plate 133 and the compression portion 130 including the support plate 133. In addition, in this case, the support plate 133 may be formed of a casting in addition to sheet metal.

[0153] On the other hand, another embodiment of the support plate will be described below.

[0154] That is, in the aforementioned embodiment, the cylinder body supporting protrusions of the support plate are formed symmetrically, but depending on circumstances, the cylinder body supporting protrusions of the support plate may also be formed asymmetrically.

[0155] Fig.13 is an exploded perspective view showing another embodiment of the support plate of this embodiment, Fig.14 yes Fig.13 Assembly stereogram of Fig.15 yes Fig.14 The main view, Fig.16 is a perspective view showing another embodiment of the support plate of this embodiment, Fig.17 yes Fig.16 main view.

[0156] Reference Figures 13 to 15 The compression part 130 including the support plate 133 of this embodiment is substantially similar to the basic structure and function of the compression part 130 of the aforementioned embodiment. For example, the compression part 130 may include a piston 131, a cylinder body 132 and a support plate 133, and the cylinder body 132 may be coupled to the stator 121 through the support plate 133 and supported along the axial direction of the drive shaft 125. Thus, by reducing the volume of the cylinder body 132, the weight of the cylinder body 132 and the compression part 130 including the cylinder body 132 may be reduced.

[0157] The cylinder body 132 may include a frame portion 1321, a bearing portion 1322, and a cylinder portion 1323. These frame portion 1321, bearing portion 1322, and cylinder portion 1323 may be made of castings and formed as a single body. Thus, roundness can be ensured while maintaining the perpendicularity of the bearing portion 1322 and the cylinder portion 1323 of the cylinder body 132 of the present embodiment.

[0158] In addition, the support plate 133 may include a cylinder body support surface portion 1331 and a plurality of cylinder body support convex portions 1332. These cylinder body support surface portion 1331 and cylinder body support convex portions 1332 may be made of sheet metal and formed as a single body. For example, the cylinder body support surface portion 1331 may be formed in a substantially "匚" or letter shape, and the plurality of cylinder body support convex portions 1332 may be respectively formed by bending from the edges and between the edges of the cylinder body support surface portion 1331 toward the stator 121.

[0159] The plurality of cylinder body support convex portions 1332 may include: a plurality of bending portions 1335 respectively bent from the cylinder body support surface portion 1331 toward the axial side surface of the stator 121; and a plurality of lifting portions 1336 respectively bent from the plurality of bending portions 1335 along the axial side surface of the stator 121. Thus, even if the support plate 133 is made of sheet metal, the cylinder body 132 can be stably supported on the stator 121.

[0160] In addition, in this case, the plurality of lifting portions 1336 may also be respectively formed symmetric with respect to the first center line CL1 and asymmetric with respect to the second center line CL2 as in the foregoing Figure 3 embodiment, or may be formed symmetric with respect to the first center line CL1 and the second center line CL2 respectively as in the Fig.11 embodiment.

[0161] However, in the present embodiment, the cylinder body support surface portion 1331 may be formed in a shape, and the plurality of cylinder body support convex portions 1332 may be respectively formed by bending from the edges and between the edges of the cylinder body support surface portion 1331 toward the stator 121. In other words, with the second center line CL2 as a reference, the first lifting portion 1336a located on the cylinder portion 1323 side may be bent from the two side edges of the cylinder body support surface portion 1331, that is, from the two open ends constituting the cylinder housing portion 1331c, and the second lifting portion 1336b located on the opposite side of the cylinder portion 1323 may be bent from between the two side edges, that is, from the middle of the two side edges. Thus, a total of three cylinder body support convex portions 1332 can be formed in the present embodiment.

[0162] In this case, the cylinder body supporting protrusion 1332 may not be bent directly from the cylinder body supporting surface portion 1331, but may be formed by further providing the first extension portion 1338a between the cylinder body supporting surface portion 1331. For example, the cylinder body supporting protrusion 1332 located on the opposite side of the cylinder portion 1323 may be extended radially from the cylinder body supporting surface portion 1331 by an amount corresponding to the length of the first extension portion 1338a, and then be bent from the other end of the first extension portion 1338a toward the axial direction of the drive shaft 125 to form the bent portion 1335. Thus, the cylinder body supporting surface portion 1331 is shortened by an amount corresponding to the length of the first extension portion 1338a, so that the weight of the support plate 133 including the cylinder body supporting surface portion 1331 can be reduced.

[0163] In this case, the outer peripheral surface of the stator core 1211 may be formed into a polyhedron such as a hexahedron as in the above-mentioned embodiment, so as to Figure 7 As a reference to the second center line CL2 of the stator core 1211, a plate support protrusion 1211b may be formed on the side of the stator core 1211 located on the opposite side of the cylinder portion 1323. For example, the plate support protrusion 1211b may be formed to protrude in the radial direction to accommodate the lifting portion 1336 of the cylinder body support protrusion 1332 and be supported in the axial direction of the drive shaft 125, and a first fastening hole 1211a may be formed in the plate support protrusion 1211b to penetrate in the axial direction of the drive shaft 125 for the stator fastening member 1215 to be inserted. Thus, the plurality of cylinder body support protrusions 1332 may be combined with the stator 121 by using the stator fastening member 1215 that fastens the stator core 1211 as in the aforementioned embodiment.

[0164] In addition, in this case, a stopper protrusion 1333 may be formed on the inner circumferential surface of the cylinder body support surface portion 1331, in other words, on the inner circumferential surface of the bearing accommodation portion 1331b, so as to protrude in the axial direction of the drive shaft 125, and a cylinder body protrusion 1324 of the cylinder body 132 may be formed on the frame portion 1321 of the cylinder body 132 so as to protrude in the axial direction of the drive shaft 125 so as to face the stopper protrusion 1333 of the cylinder body support surface portion 1331 in the radial direction. The stopper protrusion 1333 and the cylinder body protrusion 1324 may be formed so as to protrude in the axial direction of the drive shaft 125. Figure 7 Thus, the cylinder body protrusion 1324 of the cylinder body 132 is radially supported by the stopper protrusion 1333 of the cylinder body support surface 1331, thereby suppressing the radial push of the cylinder body 132 that may be generated during the suction stroke of the piston 131.

[0165] In addition, the stop convex portion 1333 and the cylinder body convex portion 1324 can be fastened by using an additional cylinder body fastening member 135 such as a bolt and / or a rivet, or the stop convex portion 1333 can also be embedded and combined with the cylinder body convex portion 1324. In this embodiment, an example is shown in which the embedding protrusion 1333a and / or the embedding groove 1324a are respectively formed on the stop convex portion 1333 and / or the cylinder body convex portion 1324, and these embedding protrusions 1333a and embedding grooves 1324a are embedded and combined with each other. The same is true for the cylinder body 132 and the support plate 133. For example, a plurality of embedding grooves (or embedding protrusions) (not shown) can be formed on one side of the cylinder body 132 facing the support plate 133, and a plurality of embedding protrusions (or embedding grooves) (not shown) that are respectively embedded and combined with the embedding grooves (not shown) of the cylinder body 132 can be formed on one side of the support plate 133 facing the cylinder body 132. Thus, the assembly process between the cylinder body 132 and the support plate 133 can be simplified.

[0166] In addition, second extension portions 1338b extending toward the inner circumferential surface of the housing 110 along the radial direction of the drive shaft 1215 may be formed at both ends of the cylinder body support surface portion 1331, and the bent portions 1335 of the cylinder body support protrusion 1332 may be bent toward the stator 121 along the axial direction of the drive shaft 125 at the second extension portions 1338b. As a result, the lateral interval D of the cylinder body support surface portion 1331 is narrowed, so that the overall area of ​​the cylinder body support surface portion 1331 is correspondingly reduced, thereby reducing the weight of the support plate 133.

[0167] As described above, in the case where three cylinder body supporting protrusions 1332 are formed, as the number of the cylinder body supporting protrusions 1332 is reduced, the number of assembling man-hours for coupling the support plate 133 to the stator 121 can be reduced accordingly. In addition, as the number of the cylinder body supporting protrusions 1332 is reduced, not only the weight of the support plate 133 can be reduced accordingly, but also the area of ​​the cylinder body supporting surface portion 1331 can be reduced, thereby reducing the overall weight of the support plate 133. In addition, by simplifying the shape of the frame portion 1321 in the cylinder body 132, the weight of the cylinder body 132 can also be reduced.

[0168] On the other hand, refer to Fig.16 and Fig.17, the frame portion 1321 of the cylinder body 132 may also protrude in the radial direction of the drive shaft 1215 on the opposite side of the cylinder portion 1323 to form a cylinder body protrusion 1324. In other words, in the frame portion 1321 of the cylinder body 132, the cylinder body protrusion 1324 may be formed so that at least a portion thereof overlaps with the cylinder body support surface portion 1331 in the axial direction of the drive shaft 125. Thus, the cylinder body protrusion 1324 is placed on the cylinder body support surface portion 1331 and supported in the axial direction of the drive shaft 125, so that the cylinder body 132 can be stably supported on the support plate 133.

[0169] In this case, the cylinder body protrusion 1324 and the stopper protrusion 1333 facing it can be fastened by using a cylinder body fastening member 135 such as a rivet or embedded and combined by providing an embedding protrusion and an embedding groove. In this way, it is possible to effectively suppress the cylinder body 132 from being pushed relative to the support plate 133 along the reciprocating direction of the piston 131 during the suction stroke and compression stroke of the piston 131.

Claims

1. A reciprocating compressor, wherein: include: shell; A driving motor, arranged inside the housing, having a stator and a rotor; a drive shaft coupled to a rotor of the drive motor; a piston, coupled to the drive shaft and performing reciprocating motion; a cylinder body having a cylinder portion and a bearing portion, wherein the piston is inserted into the cylinder portion in a reciprocating manner to form a compression chamber, and the drive shaft passes through the bearing portion so that the bearing portion supports the drive shaft in a radial direction of the drive shaft; as well as A support plate, disposed between the drive motor and the cylinder body, supporting the cylinder body on the drive motor along the axial direction of the drive shaft; One side surface of the support plate is combined with the stator, and the other side surface of the support plate is combined with the cylinder body.

2. The reciprocating compressor according to claim 1, wherein: The support plate comprises: a first cylinder body supporting portion, the cylinder body being disposed on the first cylinder body supporting portion, the first cylinder body supporting portion supporting the cylinder body in the axial direction of the drive shaft; and A plurality of second cylinder body supporting parts are respectively bent from the first cylinder body supporting part toward the stator and disposed on the stator, and are supported by the stator along the axial direction of the drive shaft.

3. The reciprocating compressor according to claim 2, wherein: The first cylinder body supporting portion and the second cylinder body supporting portion are formed to have the same thickness as each other.

4. The reciprocating compressor according to claim 2, wherein: A bearing receiving portion is formed on the first cylinder body supporting portion and penetrates along the axial direction of the driving shaft to surround and receive the bearing portion; A cylinder accommodating portion opened in a radial direction of the drive shaft is formed on one side of the bearing accommodating portion to accommodate the cylinder portion.

5. The reciprocating compressor according to claim 2, wherein: The plurality of second cylinder body support parts respectively include: a bent portion, bent from the first cylinder body supporting portion along the axial direction of the drive shaft toward the axial side surface of the stator; and The supporting portion is bent from the other end of the bent portion along the axial side surface of the stator and is supported on the axial side surface of the stator along the axial direction of the driving shaft.

6. The reciprocating compressor according to claim 5, wherein: The plurality of lifting portions are fastened to the stator by a stator fastening member penetrating the stator.

7. The reciprocating compressor according to claim 5, wherein: The plurality of lifting portions are formed by bending from the respective bending portions toward the same direction along the reciprocating direction of the piston.

8. The reciprocating compressor according to claim 7, wherein: When the center line of the piston in the reciprocating direction is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, The first lifting portion located on the cylinder side with respect to the second center line is bent toward the inner circumferential surface of the housing, and the second lifting portion located on the opposite side of the cylinder with respect to the second center line is bent away from the inner circumferential surface of the housing.

9. The reciprocating compressor according to claim 7, wherein: When the center line of the piston in the reciprocating direction is taken as the first center line, and the center line passing through the axis of the rotor and orthogonal to the first center line is taken as the second center line, The first lifting portion located on the cylinder side based on the second center line is bent to face away from the inner circumference of the housing, and the second lifting portion located on the opposite side of the cylinder based on the second center line is bent to face the inner circumference of the housing.

10. The reciprocating compressor according to claim 5, wherein: The plurality of lifting portions are formed by bending from the respective bending portions in directions opposite to each other along the reciprocating direction of the piston.

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