Reciprocating compressor

Abstract

The invention relates to a reciprocating compressor. The reciprocating compressor may include a housing, a drive motor, a drive shaft, a piston, a cylinder, a valve plate, a suction valve, and a suction valve stopper, and the suction valve stopper composed of an elastic member may be disposed between the suction valve and the cylinder to support a reed valve portion of the suction valve to limit an opening degree of the reed valve portion. Therefore, the opening degree of the suction valve can be sufficiently ensured, so that not only can the cooling force in a high-load operation region be improved, but also dead volume can be prevented in advance, and then the energy efficiency in a low-load operation region and / or a high-load operation region can be improved.

Description

Technical Field

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

[0002] The compressor can be divided into a sealed type in which the motor part and the compression part are arranged together in the housing and an open type in which the motor part and the compression part are arranged independently. In this embodiment, the sealed type compressor is mainly described, but it can also be applied to the open type in the same way.

[0003] Compressors can be classified into reciprocating, rotary, vane, scroll, etc. according to the way they compress refrigerant. Rotary compressors, vane compressors, and scroll compressors each have their own independent suction valve and discharge valve, while reciprocating compressors have an assembly composed of a suction valve and a discharge valve.

[0004] When the suction valve and the discharge valve are independently provided in the reciprocating compressor, the installation space of the valve is relatively large, so that the design freedom of the valve is high, but the assembly man-hour is increased. On the contrary, when the suction valve and the discharge valve are formed into one assembly, the installation space of the valve is narrow, so that the design freedom of the valve is low, but the assembly man-hour is reduced.

[0005] Patent document 1 (Korea Publication Patent No. 10-2003-0083367) shows a reciprocating compressor in which the suction valve and the discharge valve are formed into a valve assembly and the valve assembly is installed. In such patent document 1, the suction valve is cut from the suction valve sheet composed of an elastic member to form a cantilever shape, but there is no disclosure of a structure for limiting the opening of the suction valve. Therefore, there is a risk that the suction valve is excessively bent and broken during high-pressure and / or high-speed operation.

[0006] Patent Document 2 (US Patent No. 5,722,818) and Patent Document 3 (US Patent No. 5,839,472) disclose structures for limiting the opening of the suction valve. In Patent Document 2, an additional valve plate is provided between the cylinder and the suction valve, and a step groove is formed on the valve plate to limit the opening of the suction valve. In Patent Document 3, a step groove is formed on the front end surface of the cylinder to support the opening and closing end of the suction valve to limit the opening of the suction valve.

[0007] Patent Documents 2 and 3 limit the opening of the suction valve by using a rigid body, which may excessively limit the opening of the suction valve. Therefore, the amount of refrigerant sucked into the compression chamber is reduced, which may reduce the compressor efficiency and the maximum refrigeration capacity.

[0008] In addition, in Patent Documents 2 and 3, the step surface that limits the opening of the suction valve respectively acts as a dead volume, thereby possibly reducing the compression efficiency. In particular, in Patent Document 2, the dead volume may further increase by an amount corresponding to the suction passage of the valve plate. Summary of the invention

[0009] An object of the present invention is to provide a small-sized reciprocating compressor capable of high-load operation.

[0010] Another object of the present invention is to provide a reciprocating compressor capable of appropriately limiting the opening degree of a suction valve according to an operation range.

[0011] Still another object of the present invention is to provide a reciprocating compressor capable of limiting the opening degree of a suction valve while ensuring a sufficient opening degree of the suction valve.

[0012] Still another object of the present invention is to provide a reciprocating compressor capable of suppressing damage to the suction valve while ensuring a sufficient opening degree of the suction valve.

[0013] Still another object of the present invention is to provide a reciprocating compressor capable of quickly closing a suction valve while ensuring a sufficient opening degree of the suction valve.

[0014] Still another object of the present invention is to provide a reciprocating compressor capable of limiting the opening degree of a suction valve while suppressing the dead volume generated thereby.

[0015] Still another object of the present invention is to provide a reciprocating compressor capable of simplifying a member for restricting the opening degree of a suction valve.

[0016] 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, a valve plate, a suction valve and a suction valve stopper can be provided. The drive motor can be arranged in the internal space of the housing. 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 piston can be reciprocally inserted into the cylinder, and the cylinder can form a compression chamber together with the piston. The valve plate can be combined with the front end surface of the cylinder in a manner facing the piston, and can have a suction port and a discharge port to communicate with the compression chamber. The suction valve is arranged between the cylinder and the valve plate, and can be provided with a reed valve portion that opens and closes the suction port with one end as the center. The suction valve stopper can be arranged between the suction valve and the cylinder, and can support the reed valve portion of the suction valve to limit the opening of the reed valve portion. The suction valve stopper can be formed by an elastic member. In this way, the opening degree of the suction valve can be fully ensured, which can not only improve the cooling capacity of the high-load operation area, but also prevent dead volume in advance, thereby improving the energy efficiency of the low-load operation area and / or high-load operation area.

[0017] As an example, the rigidity of the suction valve stopper may be greater than or equal to the rigidity of the suction valve. Thus, when the suction valve is opened or closed, the suction valve stopper may elastically limit the opening and closing action of the suction valve.

[0018] As another example, the suction valve stopper may be provided with at least one stopper portion extending toward the radial center of the suction port to overlap with one side surface of the reed valve portion. The stopper portion may be bent in a direction away from the reed valve portion to be separated from the reed valve portion. Thus, in low-load operation, the opening of the suction valve is not restricted or is restricted passively, while in high-load operation, the opening of the suction valve is actively restricted, thereby preventing the reed valve portion of the suction valve from being excessively bent.

[0019] For example, the stopper portion may include a fixing portion, a bending portion, and a contact portion. The fixing portion may be fixed to the front end face of the cylinder at the radial outer contour of the compression chamber. The bending portion may extend from the fixing portion toward the radial center of the suction port, and may be bent in the radial inner portion of the compression chamber toward a direction away from the reed valve portion of the suction valve. The contact portion may extend from the bending portion and contact the reed valve portion when the reed valve portion is opened. The bending portion may be formed to be radially located between the inner peripheral surface of the compression chamber and the outer peripheral surface of the reed valve portion. Thus, the edge of the suction valve that is in contact with the front end face of the cylinder can be suppressed from being lifted up due to the bending portion while the reed valve portion of the suction valve can be suppressed from contacting the bending portion, thereby stably limiting the opening of the suction valve.

[0020] Specifically, the length from the bent portion to the end of the contact portion may be shorter than the length of the reed valve portion. Thus, the rigidity of the stopper portion is greater than that of the reed valve portion of the suction valve, so that the stopper portion can stably limit the opening of the suction valve.

[0021] In addition, a valve accommodating portion corresponding to the reed valve portion of the intake valve may be formed through the intake valve stopper. A contact portion of the stopper portion may be accommodated inside the valve accommodating portion. Thus, the contact portion of the stopper portion overlaps with the reed valve portion of the intake valve in the reciprocating direction of the piston, thereby being able to elastically support the reed valve portion of the intake valve.

[0022] In order to achieve the purpose of the present invention, it may include a piston, a cylinder, a valve plate, an intake valve and an intake valve stopper. The piston can be reciprocally inserted into the cylinder, and the cylinder can form a compression chamber together with the piston. The valve plate can be combined with the front end surface of the cylinder in a manner facing the piston, and can have an intake port and an outlet to communicate with the compression chamber. The intake valve can be arranged between the cylinder and the valve plate, and can be provided with a valve fixing portion and a reed valve portion, the valve fixing portion is combined with the cylinder, and one end of the reed valve portion extends from the valve fixing portion so that the other end opens and closes the intake port. The intake valve stopper can be arranged between the intake valve and the cylinder to limit the opening of the intake valve. Thereby, the reed valve portion of the intake valve can be suppressed from being excessively opened.

[0023] For example, the suction valve stopper may include a stopper fixing portion and at least one stopper portion. The stopper fixing portion may be coupled to the cylinder together with the valve fixing portion. At least one stopper portion may extend from the stopper fixing portion toward the compression chamber to overlap at least a portion with the reed valve portion in the reciprocating direction of the piston. Thus, when the reed valve portion of the suction valve is opened, the stopper portion may limit the opening of the suction valve while contacting the reed valve portion.

[0024] As an example, the stopper portion may include a first stopper portion and a second stopper portion. The first stopper portion may be arranged on one side with the length direction of the reed valve portion as the center. The second stopper portion may be arranged on the other side with the length direction of the reed valve portion as the center, and be separated from the first stopper portion. The first stopper portion and the second stopper portion may be formed symmetrically to each other with the length direction of the reed valve portion as the center. Thus, not only can the first stopper portion and the second stopper portion be easily manufactured, but the first stopper portion and the second stopper portion also symmetrically support the reed valve portion of the suction valve, thereby stably supporting the opening of the suction valve.

[0025] For example, the first stopper portion and the second stopper portion may be respectively arranged in a direction orthogonal to the length direction of the reed valve portion, thereby appropriately maintaining the rigidity of the first stopper portion and the second stopper portion, so that the first stopper portion and the second stopper portion can stably support the reed valve portion of the suction valve from both sides.

[0026] In addition, the radial center of the suction port may be formed eccentrically relative to the radial center of the compression chamber, and the reed valve portion of the suction valve may be extended long from the opposite side of the suction port toward the suction port in the radial direction. The first stopper portion and the second stopper portion may be formed eccentrically relative to the radial center of the compression chamber toward the suction port. Thus, the length of the first stopper portion and the second stopper portion is smaller than the length of the reed valve portion of the suction valve, thereby being able to stably limit the opening of the reed valve portion of the suction valve while increasing rigidity.

[0027] In addition, the first stopper part may include: a first fixing part extending from one side of the stopper fixing part and fixed to the front end surface of the cylinder barrel at the radial outer contour of the compression chamber; a first bending part extending from the first fixing part toward the radial center of the suction port and bending in the radial inner part of the compression chamber in a direction away from the reed valve part of the suction valve; and a first contact part extending from the first bending part and contacting one side of the reed valve part when the reed valve part is opened. The second stopper part may include: a second fixing part extending from the other side of the stopper fixing part and fixed to the front end surface of the cylinder barrel at the radial outer contour of the compression chamber; a second bending part extending from the second fixing part toward the radial center of the suction port and bending in the radial inner part of the compression chamber in a direction away from the reed valve part of the suction valve; and a second contact part extending from the second bending part and contacting the other side of the reed valve part when the reed valve part is opened. The first fixing part and the second fixing part may be respectively arranged on both sides with the length direction of the reed valve part as a reference. Thereby, the first stopper portion and the second stopper portion can stably support the reed valve portion of the suction valve on both sides.

[0028] Specifically, the width of the first bent portion can be less than or equal to the width of the first fixed portion, and the width of the second bent portion can be less than or equal to the width of the second fixed portion. Thus, the first bent portion can suppress the generation of a bending surface between it and the first fixed portion, thereby preventing damage between the first fixed portion and the first bent portion.

[0029] Specifically, the width of the first contact portion can be greater than the width of the first bent portion, and the width of the second contact portion can be greater than the width of the second bent portion. Thus, the first contact portion and the second contact portion are formed to have an area substantially corresponding to the opening and closing end area of ​​the reed valve portion, thereby being able to stably support the reed valve portion of the suction valve.

[0030] Specifically, the first contact portion can be formed long in the radial direction toward the suction port relative to the first bent portion, and the second contact portion can be formed long in the radial direction toward the suction port relative to the second bent portion. As a result, the rigidity of the first contact portion and the second contact portion is reduced, so that the reed valve portion of the suction valve can be greatly bent and opened, thereby increasing the refrigerant suction amount.

[0031] As another example, the stopper portion may be composed of one stopper portion. Thus, the shape of the stopper portion can be simplified, and the suction valve stopper can be easily processed.

[0032] For example, the radial center of the suction port may be formed eccentrically relative to the radial center of the compression chamber, and the reed valve portion of the suction valve may be extended long from the opposite side of the suction port toward the suction port in the radial direction. The stopper portion may be formed on the suction port side with a center line orthogonal to the length direction of the reed valve portion as a reference. Thus, even if only one stopper portion is formed, the reed valve portion of the suction valve can be stably supported by increasing the rigidity of the stopper portion.

[0033] Specifically, the stopper portion may be disposed on the same line as the length direction of the reed valve portion. Thus, the reed valve portion of the suction valve may be symmetrically supported while only one stopper portion is formed, thereby enabling stable support.

[0034] Specifically, the stopper portion may include: a fixing portion extending from the stopper fixing portion and fixed to the front end surface of the cylinder barrel at the radial outer contour of the compression chamber; a bending portion extending from the fixing portion toward the radial center of the suction port and bending in the radial inner part of the compression chamber toward the direction away from the reed valve portion of the suction valve; and a contact portion extending from the bending portion and contacting one side of the reed valve portion when the reed valve portion is opened. The radial center of the contact portion may be formed eccentrically toward the other end side of the reed valve portion relative to the radial center of the suction port. Thus, the interval between the suction valve and the suction valve stopper can be fully ensured, thereby preventing the excessive increase in the supporting force on the suction valve at the initial stage of opening.

[0035] In order to achieve the purpose of the present invention, a piston, a cylinder, a valve plate, an intake valve and an intake valve stopper may be included. The piston may be reciprocally inserted into the cylinder, and the cylinder may form a compression chamber together with the piston. The valve plate may be combined with the front end face of the cylinder in a manner facing the piston, and may have an intake port and an outlet port to communicate with the compression chamber. The intake valve may be arranged between the cylinder and the valve plate, and may be provided with a valve fixing portion and a reed valve portion, the valve fixing portion being combined with the cylinder, and one end of the reed valve portion extending from the valve fixing portion so that the other end opens and closes the intake port. The intake valve stopper may be arranged between the intake valve and the cylinder to limit the opening of the intake valve. For example, the intake valve stopper may be formed by at least one or more separate components and fixed to the front end face of the cylinder. Thus, the stopper fixing portion may be excluded from the intake valve stopper, thereby saving the material cost of the intake valve stopper.

[0036] As an example, the suction valve stopper may include: a fixing portion fixed to the front end face of the cylinder at the radial outer contour of the compression chamber; a bending portion extending from the fixing portion toward the radial center of the suction port and bending in the radial inner part of the compression chamber in a direction away from the reed valve portion of the suction valve; and a contact portion extending from the bending portion and contacting one side of the reed valve portion when the reed valve portion is opened. A stopper fixing groove may be formed at the front end face of the cylinder to insert the fixing portion. Thus, even if the stopper fixing portion is excluded from the suction valve stopper, the fixing portion of the suction valve stopper can be stably fixed between the cylinder and the suction valve.

[0037] Specifically, the fixing portion may be formed with a supporting protrusion extending in a direction intersecting with the length direction of the suction valve stopper. The stopper fixing groove may be formed with a supporting protrusion insertion groove so that the supporting protrusion is inserted and supported. Thus, the supporting protrusion of the suction valve stopper is inserted into the supporting protrusion insertion groove of the cylinder barrel and radially supported, so that when the piston retreats, the stopper portion can be fixed to the front end surface of the cylinder barrel more stably.

[0038] Specifically, a stopper insertion groove may be formed on the front end surface of the piston to insert the contact portion. Thus, the suction valve stopper may be composed of a single stopper portion, and the piston may advance to the front end surface of the cylinder, thereby preventing the generation of dead volume.

[0039] For example, the suction valve stopper may include a first stopper and a second stopper. The first stopper may be arranged on one side with the length direction of the reed valve portion as the center. The second stopper may be arranged on the other side with the length direction of the reed valve portion as the center. Thus, the first stopper portion and the second stopper portion symmetrically support the reed valve portion of the suction valve, thereby being able to stably support the opening of the suction valve.

[0040] In addition, the suction valve stopper may be composed of one stopper and may be arranged on the length direction line of the reed valve portion. Thus, the rigidity of the stopper portion can be improved while only one stopper portion is formed, and the reed valve portion of the suction valve can be symmetrically supported while only one stopper portion is formed, thereby enabling stable support. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a perspective view showing the interior of the reciprocating compressor of this embodiment through the outer shell.

[0042] Figure 2 It is shown Figure 1 A cross-sectional view of the interior of a reciprocating compressor.

[0043] Figure 3 This is a perspective view showing the valve assembly of this embodiment in an exploded manner.

[0044] Figure 4 Yes Figure 3 A perspective view of the suction valve and the suction valve stopper exploded and shown.

[0045] Figure 5 Yes Figure 4 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view.

[0046] Figure 6 yes Figure 5 “Ⅷ-Ⅷ” line cross-sectional view.

[0047] Figure 7 yes Figure 5 “Ⅸ-Ⅸ” line cross-sectional view.

[0048] Figure 8 is a schematic diagram showing the contact state between the suction valve and the suction valve stopper during high load operation.

[0049] Fig. 9 is a schematic diagram showing the contact state between the suction valve and the suction valve stopper during low load operation.

[0050] Fig.10 This is a graph showing the change in cooling power in each operating area when the suction valve stopper of this embodiment is applied, in comparison with the conventional technology.

[0051] Fig.11 This is a graph showing changes in efficiency in each operating region when the suction valve stopper of this embodiment is applied, in comparison with the prior art.

[0052] Fig.12 is a perspective view showing another embodiment of a suction valve stopper.

[0053] Fig.13 Yes Fig.12 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view.

[0054] Fig.14 yes Fig.13 “XV-XV” line sectional view.

[0055] Fig.15 is a perspective view showing still another embodiment of a suction valve stopper.

[0056] Fig.16 Yes Fig.15 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view.

[0057] Fig.17 and Fig.18 yes Fig.16 The cross section of the "XⅧ-XⅧ" line, Fig.17 is a diagram showing the suction stroke of the piston, Fig.18 It is a diagram showing the discharge stroke of the piston. DETAILED DESCRIPTION

[0058] Hereinafter, the reciprocating compressor of the present invention will be described in detail based on an embodiment shown in the accompanying drawings. As described above, the compressor is provided with a suction valve, which guides the refrigerant to the compression chamber and intercepts the refrigerant sucked into the compression chamber to be compressed. Depending on the compression method, the suction valve can be provided together with the discharge valve, or it can be provided separately from the discharge valve. In this embodiment, the description is centered on a reciprocating compressor in which the suction valve and the discharge valve are provided together. However, it is not limited to this, and it can also be similarly applied to a compressor in which a valve assembly is formed by a suction valve and a discharge valve and the valve assembly is used.

[0059] In addition, the suction valve may be provided by one alone, or by a plurality of suction valves provided independently, or by a plurality of suction valves provided in connection with each other. In the present embodiment, the description is centered on the example of a suction valve provided independently. However, the present invention may also be applicable to the case where a plurality of suction valves are provided independently or in connection with each other.

[0060] In addition, the following description will be made with the compression chamber side defined as the front and the opposite side defined as the rear, with the piston as the center. In conjunction with this, in the valve assembly, the side where the suction valve is opened is defined as the rear and the side where it is closed is defined as the front.

[0061] 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.

[0062] Reference Figure 1 and Figure 2 The 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Reference Figure 1 and Figure 2The 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.

[0068] The stator 121 may include a stator core 1211 and a stator coil 1212 .

[0069] The stator core 1211 is made of a metal material such as an electrical steel plate. When a voltage is applied to the electric unit 120 from the outside, the stator core 1211 performs electromagnetic interaction caused by electromagnetic force together with a stator coil 1212 and a rotor 122 described later.

[0070] The stator core 1211 is formed in a substantially quadrilateral cylindrical shape. For example, the inner circumference of the stator core 1211 may be formed in a circular shape, and the outer circumference thereof may be formed in a quadrilateral shape. The stator core 1211 may be fixed to the bottom surface of the main bearing 131 by stator fastening bolts (not shown).

[0071] The stator core 1211 may be spaced apart from the inner surface of the housing 110 in the axial and radial directions, and the lower end of the stator core 1211 may be 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.

[0072] 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.

[0073] The rotor 122 includes a rotor core 1221 and a magnet 1222 .

[0074] 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, similar to the stator core 1211 . The drive shaft 125 described below may be press-fitted into the center of the rotor core 1221 .

[0075] The magnets 1222 may be formed of permanent magnets and may be inserted and coupled to the rotor core 1221 at equal intervals along 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.

[0076] Reference Figure 1 and Figure 2 The compression unit 130 of this embodiment may include a main bearing 131 and a piston 132. The main bearing 131 is elastically supported on the housing 110, and the piston 132 is connected to the driving shaft 125 by a connecting rod 126 to move relative to the main bearing 131.

[0077] The main bearing 131 may be disposed on one axial side, such as the upper side, of the electric part 120 . The main bearing 131 may be fastened to the stator 121 by stator fastening bolts (not shown) and elastically supported on the lower housing 111 together with the stator 121 of the electric part 120 .

[0078] The main bearing 131 of this embodiment may include: a frame portion 1311; a fixed protrusion 1312, which is combined with the stator 121 of the electric portion 120; a bearing portion 1313, which supports the drive shaft 125; and a cylinder portion (cylinder) 1315, which forms a compression chamber 130a.

[0079] The frame portion 1311 may be formed in a flat plate shape extending in the lateral direction, or may be formed in a radial plate shape by weight reduction processing of a portion of the edge except for the corners.

[0080] The fixing protrusion 1312 may be formed at an edge of the frame portion 1311. For example, the fixing protrusion 1312 may be formed to protrude downward from the edge of the frame portion 1311 toward the electric portion 120.

[0081] The bearing part 1313 may be formed to extend axially from the center of the frame part 1311 toward both sides. A bearing hole 1313a may be formed axially through the bearing part 1313 to allow the drive shaft 125 to pass through, and a bushing bearing may be inserted and coupled to the inner circumference of the bearing hole 1313a.

[0082] The drive shaft 125 may be supported in the axial direction by the upper end of the bearing portion 1313, and may be supported in the radial direction by the inner circumferential surface of the bearing portion 1313. Thus, the drive shaft 125 may be supported in the axial direction and the radial direction by the main bearing 131.

[0083] The cylinder portion (hereinafter referred to as the cylinder) 1315 may be formed eccentrically in the radial direction from one side edge of the frame portion 1311. The cylinder 1315 may be penetrated in the radial direction, and a piston 132 connected to the connecting rod 126 may be inserted into the inner opening end, and a valve assembly 141 constituting the suction and discharge portion 140 described later may be installed at the outer opening end. The cylinder 1315 will be described again later together with the valve plate 1411, the suction valve 1412, and the suction valve stopper 1413.

[0084] The piston 132 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 132 and rotatably coupled to the piston 132, and the front side of the piston 132 forms a compression chamber 130a inside the cylinder 1315 together with the valve assembly 141 described later.

[0085] Reference Figure 1 and Figure 2 The 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 1315.

[0086] The valve assembly 141 may include a valve plate 1411, an inlet valve 1412, an inlet valve stopper 1413, a discharge valve 1414, a discharge valve stopper 1415, a discharge cover 1416, and a gasket 1417. Although not shown in the figure, in the valve assembly 141, in addition to the gasket 1417 described above, gaskets (not shown) may be provided between the various components.

[0087] The valve plate 1411 may be formed in a substantially quadrilateral plate shape and is provided to cover the front end surface of the main bearing 131, that is, one side opening surface of the compression chamber 130a. For example, fastening holes (not marked with reference numerals) are respectively formed at the edges and corners of the valve plate 1411 so as to be fastened to fastening grooves (not marked with reference numerals) provided at the front end surface of the main bearing 131 by bolts.

[0088] The side surfaces of the valve plate 1411 may be formed substantially flat and have a suction port 1411a and a discharge port 1411b respectively formed in the center. However, depending on the situation, the suction port 1411a and / or the discharge port 1411b may be formed in plural. As described above, the present embodiment shows an example in which the suction port 1411a and the discharge port 1411b are respectively formed in one, and the suction port 1411a is formed at a position eccentric from the radial center Oc of the compression chamber 130a described later. Later, the valve plate 1411 will be described again together with the cylinder 1315, the suction valve 1412, and the suction valve stopper 1413.

[0089] The suction valve 1412 may be formed as a quadrilateral plate body composed of a thin steel plate having elastic force, and may be arranged on a side facing the piston 132 with the valve plate 1411 as a reference, that is, on the rear side. For example, the suction valve 1412 may include a valve fixing portion 1412a and a reed valve portion 1412b, wherein the valve fixing portion 1412a constitutes an edge and is fixed between the cylinder 1315 and the valve plate 1411, and the reed valve portion 1412b is cut from the center of the valve fixing portion 1412a in a cantilever shape to open and close the suction port 1411a. Thus, in the suction valve 1412, the opening and closing end 1412b2 of the reed valve portion 1412b described later may be opened and closed by bending in the direction toward the piston 132 with the fixing end 1412b1 as the center. The suction valve 1412 will be described again later together with the cylinder 1315 , the valve plate 1411 , and the suction valve stopper 1413 .

[0090] Similar to the suction valve 1412, the suction valve stopper 1413 can be formed as a quadrilateral plate body composed of a thin steel plate having elastic force, and can be arranged on one side of the suction valve 1412, in other words, on the side facing the rear side of the piston 132. In the suction valve stopper 1413, the stopper parts 1418a and 1418b described later can be cut out from the stopper fixing part 1413a described later in a cantilever shape. Thus, in the suction valve stopper 1413, the stopper part 1413b described later is arranged on the side of the opening direction relative to the reed valve part 1412b of the suction valve 1412 to elastically limit the opening of the reed valve part 1412b. The suction valve stopper 1413 will be described again later together with the cylinder 1315, the valve plate 1411, and the suction valve 1412.

[0091] 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 132 to open and close the discharge port 1411b.

[0092] 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.

[0093] The discharge cover 1416 is fastened to the front end surface of the main bearing 131 through the valve plate 1411, the suction valve 1412, and the suction valve stopper 1413, 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.

[0094] 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 1315.

[0095] Reference Figure 1 and Figure 2 , the discharge muffler 143 of this embodiment can be provided separately from the main bearing 131. 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.

[0096] 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.

[0097] 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 its own first spring cap 152 and second spring cap 153, so that the compressor body C is elastically supported on the housing 110.

[0098] Reference numeral 1255 not described in the drawings is an oil supply device.

[0099] The reciprocating compressor of the present embodiment as described above operates in the following manner.

[0100] 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 132 through the connecting rod 126. The piston 132 reciprocates in the front-rear direction relative to the cylinder 1315 through the connecting rod 126.

[0101] For example, if the piston 132 retreats in the cylinder 1315 (suction 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 1315 through the suction valve 1412 of the valve assembly 141.

[0102] On the contrary, if the piston 132 moves forward in the cylinder 1315 (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.

[0103] Here, in the suction valve 1412, according to the pressure change of the compression chamber 130a caused by the reciprocating motion of the piston 132, in other words, the difference between the pressure of the compression chamber 130a and the internal pressure of the suction muffler 142, the other end of the reed valve portion 1412b of the suction valve 1412 constituting the opening and closing end 1412b2 rotates around one end constituting the fixed end 1412b1 to open and close the suction port 1411a.

[0104] For example, when the piston 132 moves backward (intake stroke), the internal pressure of the suction muffler 142 becomes higher than the pressure of the compression chamber 130a. Then, the other end of the reed valve portion 1412b of the suction valve 1412 constituting its opening and closing end 1412b2 rotates around the one end constituting the fixed end 1412b1 to open the suction port 1411a of the valve plate 1411.

[0105] At this time, when the compressor is operating under high load (e.g., high pressure and / or high speed), the reciprocating speed of the piston 132 increases to 80 Hz or more, which may increase the opening of the suction valve 1412. In other words, during high load operation, the reed valve portion 1412b of the suction valve 1412 is excessively bent, which may increase the fatigue strength of one end constituting the fixed end 1412b1. Therefore, the suction valve 1412 may be damaged, which limits the diversification of the operating range of the compressor or the efficient operation.

[0106] Taking this into consideration, when a stopper portion and / or a stopper member formed of a rigid body is provided between the cylinder 1315 and the suction valve 1412, the opening of the suction valve 1412 cannot be fully ensured under high-load operation, which may result in reduced cooling power and / or reduced efficiency.

[0107] Therefore, in the present embodiment, a suction valve stopper for elastically limiting the opening degree of the suction valve may be provided on one side of the suction valve, in other words, on the side of the suction valve facing the cylinder.

[0108] Figure 3 1 is a perspective view showing the valve assembly of this embodiment in an exploded manner. Figure 4 Yes Figure 3 A perspective view of the suction valve and the suction valve stopper exploded and shown, Figure 5 Yes Figure 4 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view, Figure 6 yes Figure 5 The “Ⅷ-Ⅷ” line cross-sectional view, Figure 7 yes Figure 5 “Ⅸ-Ⅸ” line cross-sectional view.

[0109] Reference Figures 3 to 7 In this embodiment, a suction valve stopper 1413 for limiting the opening of the suction valve 1412 can be provided between the front end surface 1315a of the cylinder 1315 and the rear surface (not marked with a reference numeral) of the suction valve 1412. Thus, by limiting the excessive opening of the reed valve portion 1412b of the suction valve 1412 when the piston 132 retreats (discharge stroke), it is possible to suppress damage to the suction valve 1412. Thus, the reciprocating compressor can be miniaturized while achieving high-load operation of more than 80 Hz.

[0110] For example, the suction valve stopper 1413 may be formed of an elastic member. In other words, similarly to the suction valve 1412, the suction valve stopper 1413 may be formed of a thin steel plate having elastic force, and may be formed of a material and / or thickness having a greater or equal rigidity than the suction valve 1412. Thus, when the suction valve 1412 is opened or closed, the suction valve stopper 1413 may elastically limit the opening and closing action of the suction valve 1412.

[0111] Although not shown, a sealing material such as rubber may be applied to the surface of the suction valve stopper 1413. Thus, even without using an additional gasket between the cylinder 1315 and the suction valve stopper 1413 and / or between the suction valve stopper 1413 and the suction valve 1412, it is possible to effectively seal between them.

[0112] In addition, at least one stopper portion 1413b may be formed at a portion of the suction valve stopper 1413 that faces the reed valve portion 1412b of the suction valve 1412. In other words, the suction valve stopper 1413 is provided with at least one stopper portion 1413b extending from a stopper fixing portion 1413a described later toward the radial center of the suction port 1411a, and the stopper portion 1413b may be formed to overlap at least a portion with the reed valve portion 1412b along the reciprocating direction of the piston 132. Thus, when the reed valve portion 1412b of the suction valve 1412 is opened, the stopper portion 1413b may contact the reed valve portion 1412b and limit the opening of the suction valve 1412.

[0113] In this case, the stopper portion 1413b may be formed flat as in the state where the suction valve 1412 is closed, but may be bent to be separated from the reed valve portion 1412b by a preset interval. In this embodiment, an example in which the stopper portion 1413b is bent is shown. Thus, in low-load operation (low-pressure and / or low-speed operation), the opening of the suction valve 1412 is not restricted or passively restricted. On the contrary, in high-load operation, by actively restricting the opening of the suction valve 1412, it is possible to prevent the reed valve portion 1412b of the suction valve 1412 from being excessively bent.

[0114] For example, the middle portion of the stopper portion 1413b may be bent and tilted so as to be closer to the opening and closing end 1412b2 side of the reed valve portion 1412b and further away from the reed valve portion 1412b, or may be bent in a step-like manner from the middle of the stopper portion 1413b so as to be further away from the reed valve portion 1412b. In this embodiment, an example in which the stopper portion 1413b is tilted is shown.

[0115] Specifically, refer to Figure 3 and Figure 4The suction valve stopper 1413 may include a stopper fixing portion 1413a and a plurality of stopper portions 1418a, 1418b. The stopper fixing portion 1413a is a portion fixed to the front end surface 1315a of the cylinder 1315 together with the valve fixing portion 1412a of the suction valve 1412, and the plurality of stopper portions 1418a, 1418b are portions that contact the reed valve portion 1412b of the suction valve 1412 and directly limit the opening of the reed valve portion 1412b.

[0116] The stopper fixing portion 1413a of the present embodiment may be formed as a quadrilateral plate having the same cross-sectional area as the valve fixing portion 1412a of the suction valve 1412. Thus, the suction valve stopper 1413 may be fastened to the front end surface 1315a of the cylinder 1315 together with a fastening member (not marked with a reference numeral) that fastens the suction valve 1412 to the cylinder 1315.

[0117] A valve accommodating portion 1413a1 may be formed through the center of the stopper fixing portion 1413a, and a discharge through hole 1413a2 may be formed on one side of the valve accommodating portion 1413a1. The valve accommodating portion 1413a1 and the discharge through hole 1413a2 may be formed separately from each other, or may be connected to each other. In the present embodiment, an example is shown in which the valve accommodating portion 1413a1 and the discharge through hole 1413a2 are connected to each other. Thus, by removing the interval between the valve accommodating portion 1413a1 and the discharge through hole 1413a2, the area of ​​the valve accommodating portion 1413a1 can be formed as large as possible.

[0118] In addition, the valve accommodating portion 1413a1 may be formed in the same or substantially the same shape as the reed valve portion 1412b of the suction valve 1412. In other words, one end of the valve accommodating portion 1413a1 away from the suction port 1411a of the valve plate 1411 may be formed narrowly, while the other end facing the suction port 1411a may be formed relatively wide. Thus, the dead volume may be reduced by minimizing the interval between the reed valve portion 1412b of the suction valve 1412 and the valve accommodating portion 1413a1 while allowing the reed valve portion 1412b of the suction valve 1412 to open and close smoothly.

[0119] Reference Figure 4 and Figure 5, the plurality of stopper portions 1413b of the present embodiment may include a first stopper portion 1418a and a second stopper portion 1418b. The first stopper portion 1418a may be disposed on one side with a first center line CL1 extending along the length direction (hereinafter, first center line direction) of the reed valve portion 1412b as a reference, and the second stopper portion 1418b may be disposed on the other side with the first center line CL1 as a reference. In other words, the first stopper portion 1418a and the second stopper portion 1418b may be disposed to be spaced apart from each other on both sides with the first center line CL1 as a reference.

[0120] In this case, the first stopper portion 1418a and the second stopper portion 1418b may be formed in a direction intersecting the opening and closing direction of the reed valve portion 1412b of the suction valve 1412, in other words, in a direction intersecting the first center line CL1. For example, the first stopper portion 1418a and the second stopper portion 1418b may be formed to face each other on the second center line CL2 extending in a direction (hereinafter, the second center line direction) orthogonal to the first center line CL1. Thus, the rigidity of the first stopper portion 1418a and the second stopper portion 1418b can be appropriately maintained.

[0121] For example, when the first stopper portion 1418a and the second stopper portion 1418b are formed to be inclined in the direction toward the fixed end 1412b1 of the reed valve portion 1412b, as the length of the first stopper portion 1418a and the second stopper portion 1418b becomes shorter, the rigidity of the stopper portions 1418a and 1418b on both sides may be excessively increased. On the contrary, when the first stopper portion 1418a and the second stopper portion 1418b are formed to be inclined in the direction away from the fixed end 1412b1 of the reed valve portion 1412b, the first stopper portion 1418a and the second stopper portion 1418b not only become longer in length, but also bend in the same direction as the reed valve portion 1412b, thereby reducing the rigidity of the stopper portions 1418a and 1418b on both sides.

[0122] Therefore, in this embodiment, as described above, the first stopper portion 1418a and the second stopper portion 1418b are formed to be orthogonal to the first center line CL1, the first stopper portion 1418a and the second stopper portion 1418b can stably support the reed valve portion 1412b of the suction valve 1412 from both sides.

[0123] Although not shown, the first stopper portion 1418a and the second stopper portion 1418b may also form an angle greater or less than a right angle with the first center line CL1. For example, the first stopper portion 1418a and the second stopper portion 1418b may be formed to be inclined toward the suction port 1411a from one end side of the reed valve portion 1412b constituting the fixed end 1412b1. In this case, the length of the first stopper portion 1418a and the length of the second stopper portion 1418b become longer, so that the rigidity of the stopper portions 1418a and 1418b on both sides is reduced, thereby further increasing the opening of the suction valve 1412. On the contrary, the first stopper portion 1418a and the second stopper portion 1418b may also be formed to be inclined toward the suction port 1411a from the other end side of the reed valve portion 1412b constituting the opening and closing end 1412b2. In this case, the length of the first stopper portion 1418a and the length of the second stopper portion 1418b are shortened, so that the rigidity of the stopper portions 1418a and 1418b on both sides is increased, thereby further actively limiting the opening of the suction valve 1412.

[0124] In addition, the first stopper portion 1418a and the second stopper portion 1418b can be formed symmetrically with respect to the first center line CL1. Thus, not only can the first stopper portion 1418a and the second stopper portion 1418b be easily manufactured, but the first stopper portion 1418a and the second stopper portion 1418b also symmetrically support the reed valve portion 1412b of the suction valve 1412, thereby stably supporting the opening of the suction valve 1412. In the following, the first stopper portion 1418a is used as the center for the description, and the description of the first stopper portion 1418a replaces the description of the second stopper portion 1418b.

[0125] Reference Figures 4 to 6 In this embodiment, the first stopper portion 1418a may be formed eccentrically from the radial center Oc of the compression chamber 130a to the suction port 1411a side. In other words, the first stopper portion 1418a may be formed to be eccentrically arranged toward the suction port 1411a side relative to the third center line CL3 that is orthogonal to the first center line CL1 and passes through the radial center Oc of the compression chamber 130a.

[0126] For example, as the suction port 1411a of the valve plate 1411 is formed eccentrically with respect to the third center line CL3, the other end of the reed valve portion 1412b of the suction valve 1412 constituting the opening and closing end 1412b2 may also be formed eccentrically toward the suction port 1411a side with respect to the third center line CL3, and the first stopper portion 1418a that limits the opening of the reed valve portion 1412b of the suction valve 1412 may also be formed at a position eccentric toward the suction port 1411a side with respect to the third center line CL3. Thus, the length L1 of the first stopper portion 1418a may be formed to be smaller than the length L of the reed valve portion 1412b of the suction valve 1412. Thus, the rigidity of the first stopper portion 1418a is greater than the rigidity of the reed valve portion 1412b of the suction valve 1412, so that the first stopper portion 1418a can stably limit the opening of the reed valve portion 1412b of the suction valve 1412.

[0127] Specifically, refer to Figures 4 to 7 , the first stopper portion 1418a may include a first fixing portion 1418a1, a first bending portion 1418a2, and a first contact portion 1418a3. As described above, the first fixing portion 1418a1 extends from one side of the stopper fixing portion 1413a and constitutes one end of the first stopper portion 1418a, the first bending portion 1418a2 is formed between the first fixing portion 1418a1 and the first contact portion 1418a3, and the first contact portion 1418a3 extends from the first bending portion 1418a2 and constitutes the other end of the first stopper portion 1418a. Thus, the first fixing portion 1418a1, the first bending portion 1418a2, and the first contact portion 1418a3 may be formed as a single body.

[0128] The first fixing portion 1418a1 may be extended long from one side of the stopper fixing portion 1413a along the second center line CL2, and may be fixed to the front end surface 1315a of the cylinder 1315 at the radial outer contour of the compression chamber 130a. In other words, the first fixing portion 1418a1 may be formed by cutting the stopper fixing portion 1413a in a direction orthogonal to the length direction of the reed valve portion 1412b, and may be pressed and fixed by the valve plate 1411 at the front end surface 1315a of the cylinder 1315 together with the suction valve 1412. Thus, the first fixing portion 1418a1 is formed outside the valve accommodating portion 1413a1 provided at the center of the stopper fixing portion 1413a, so that the first fixing portion 1418a1 can be prevented from interfering with the reed valve portion 1412b of the suction valve 1412 when the suction valve 1412 is opened or closed.

[0129] The first bent portion 1418a2 may be formed to extend from the inner end (the end on the center side) of the first fixed portion 1418a1 and be located outside the reed valve portion 1412b inside the compression chamber 130a. In other words, the first bent portion 1418a2 may be formed to be located between the inner peripheral surface of the compression chamber 130a and the outer peripheral surface of the reed valve portion 1412b. Thus, while the edge of the suction valve 1412 that contacts the front end surface 1315a of the cylinder 1315 is suppressed from tilting due to the first bent portion 1418a2, the reed valve portion 1412b of the suction valve 1412 is suppressed from contacting the first bent portion 1418a2, thereby stably limiting the opening of the suction valve.

[0130] In addition, the first bent portion 1418a2 may be bent from one side of the suction valve 1412 toward a direction away from the suction valve 1412. For example, the first bent portion 1418a2 may be bent so that the first contact portion 1418a3 has a slope of about 15 to 60 degrees relative to the first fixed portion 1418a1. Thus, the first contact portion 1418a3 described later may form a height difference of about 0.5 to 5 mm with the reed valve portion 1412b.

[0131] In this case, the width D2 of the first bent portion 1418a2 may be formed to be the same as the width D1 of the first fixed portion 1418a1. Thus, the first bent portion 1418a2 can prevent damage between the first fixed portion 1418a1 and the first bent portion 1418a2 by suppressing the generation of a bent surface between the first fixed portion 1418a1 and the first fixed portion 1418a1.

[0132] Although not shown, the width D2 of the first bent portion 1418a2 may be formed to be smaller than or larger than the width D1 of the first fixed portion 1418a1. For example, in the case where the width D2 of the first bent portion 1418a2 is formed to be smaller than the width D1 of the first fixed portion 1418a1, the rigidity of the first stopper portion 1418a may be reduced while ensuring the fixing area of ​​the first fixed portion 1418a1 to expand the opening of the suction valve. On the contrary, in the case where the width D2 of the first bent portion 1418a2 is formed to be larger than the width D1 of the first fixed portion 1418a1, the reliability of the first stopper portion 1418a may be improved. However, in the case where the width D1 of the first fixed portion 1418a1 and the width D2 of the first bent portion 1418a2 are formed differently, it may be advantageous in terms of reliability to form the first fixed portion 1418a1 and the first bent portion 1418a2 by cutting obliquely or bending.

[0133] The first contact portion 1418a3 may be formed to extend from the first bent portion 1418a2, and as described above, may be inclined at a preset angle (e.g., approximately 15 to 60 degrees relative to the first fixed portion) relative to the suction valve 1412. Thus, when the reed valve portion 1412b of the suction valve 1412 is closed or operates at a low load, the first contact portion 1418a3 may not contact or may contact the reed valve portion 1412b weakly. On the contrary, when the suction valve 1412 is opened or operates at a high load, the first contact portion 1418a3 may contact the reed valve portion 1412b strongly and bend together with the reed valve portion 1412b.

[0134] The first contact portion 1418a3 may be formed to be larger than the first bending portion (and / or the first fixing portion) 1418a2. For example, the first contact portion 1418a3 may be formed in a semicircular shape, and may be formed to be smaller than or equal to the other end of the opening and closing end 1412b2 of the reed valve portion 1412b constituting the suction valve 1412. In other words, the width D3 of the first contact portion 1418a3 may be formed to be larger than the width D2 of the first bending portion (and / or the first fixing portion) 1418a2, and may be formed to have a width approximately half that of the opening and closing end 1412b2 of the reed valve portion 1412b. Thus, the first contact portion 1418a3 may be formed together with the second contact portion 1418b3 described later to have an area approximately corresponding to the area of ​​the opening and closing end 1412b2 of the reed valve portion 1412b, so that the reed valve portion 1412b of the suction valve 1412 may be stably supported.

[0135] The first contact portion 1418a3 may be formed eccentrically toward the suction port 1411a relative to the second center line CL2 connecting the first fixed portion (or first bent portion) 1418a1 and the second fixed portion (or second bent portion) 1418b1 described later. In other words, the first contact portion 1418a3 may be connected to the first bent portion 1418a2, and the first contact portion 1418a3 may be connected to the first bent portion 1418a2 at a position eccentric toward the radial center Oc of the compression chamber 130a. Thus, the first contact portion 1418a3 extends long toward the suction port 1411a relative to the first bent portion 1418a2, thereby reducing the rigidity of the first contact portion 1418a3. Thus, during high-load operation, the reed valve portion 1412b of the suction valve 1412 is greatly bent and opened, thereby increasing the amount of refrigerant suction.

[0136] Reference Figures 4 to 6, the second stopper portion 1418b may include a second fixing portion 1418b1, a second bending portion 1418b2, and a second contact portion 1418b3. As described above, the second fixing portion 1418b1 extends from the other side of the stopper fixing portion 1413a and constitutes one end portion of the second stopper portion 1418b, the second bending portion 1418b2 is formed between the second fixing portion 1418b1 and the second contact portion 1418b3, and the second contact portion 1418b3 extends from the second bending portion 1418b2 and constitutes the other end portion of the second stopper portion 1418b. Thus, the second fixing portion 1418b1, the second bending portion 1418b2, and the second contact portion 1418b3 may be formed as a single body.

[0137] The second fixing portion 1418b1 may be formed on the opposite side of the first fixing portion 1418a1 with the first center line CL1 as a reference, the second bending portion 1418b2 may be formed on the opposite side of the first bending portion 1418a2 with the first center line CL1 as a reference, and the second contact portion 1418b3 may be formed on the opposite side of the second contact portion 1418b3 with the first center line CL1 as a reference. In other words, with the first center line CL1 as a reference, the second fixing portion 1418b1 may be symmetrical with the first fixing portion 1418a1, the second bending portion 1418b2 may be symmetrical with the first bending portion 1418a2, and the second contact portion 1418b3 may be symmetrical with the first contact portion 1418a3. Thus, the description of the second fixing portion 1418b1 is replaced by the description of the first fixing portion 1418a1, the description of the second bending portion 1418b2 is replaced by the description of the first bending portion 1418a2, and the description of the second contact portion 1418b3 is replaced by the description of the first contact portion 1418a3.

[0138] As described above, with the suction valve stopper 1413 having elastic force provided between the cylinder 1315 and the suction valve 1412, the opening of the suction valve 1412 can be appropriately limited during high-load operation. Thus, by suppressing excessive bending of the reed valve portion 1412b of the suction valve 1412 during suction under high-load operation, damage to the valve can be prevented in advance. At the same time, as the suction valve stopper 1413 elastically bends along with the suction valve 1412, the opening of the suction valve 1412 can be fully ensured to improve the cooling power.

[0139] In addition, since the suction valve stopper 1413 is bent and formed to be separated from the reed valve portion 1412b of the suction valve 1412 by a preset interval, the opening action of the suction valve 1412 is not restricted when the suction valve 1412 is initially opened. Therefore, during high-load operation, the reed valve portion 1412b of the suction valve 1412 is quickly opened, and during low-load operation, the reed valve portion 1412b of the suction valve 1412 is also smoothly opened, thereby ensuring an appropriate opening degree of the suction valve 1412. As a result, not only can the suction valve 1412 be operated in various operating ranges, but also the energy efficiency of each operating range can be improved.

[0140] Figure 8 is a schematic diagram showing the contact state between the suction valve and the suction valve stopper during high load operation, Fig. 9 is a schematic diagram showing the contact state between the suction valve and the suction valve stopper during low load operation.

[0141] Reference Figure 8 When the reciprocating compressor is in high-load operation, the piston 132 reciprocates at a high speed. As a result, the reed valve portion 1412b of the suction valve 1412 is greatly bent to open and close the suction port 1411a.

[0142] For example, in stage a when the piston 132 begins to retreat and the front end surface 132a of the piston 132 slightly moves away from the top dead center, the reed valve portion 1412b of the suction valve 1412 slightly bends. However, since the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413 are respectively separated from the suction valve 1412 by a preset interval, the reed valve portion 1412b of the suction valve 1412 does not contact the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413. Therefore, at the initial stage of the retreat of the piston 132, the reed valve portion 1412b of the suction valve 1412 is quickly opened, so that the refrigerant can be quickly sucked into the compression chamber 130a.

[0143] Next, in stage b, when the piston 132 further retreats and the front end surface 132a of the piston 132 moves further away from the top dead center, the reed valve portion 1412b of the suction valve 1412 is further bent. As a result, the reed valve portion 1412b of the suction valve 1412 contacts the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413 and begins to be restricted from opening. However, in this case, since the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 have elastic force, the opening action of the reed valve portion 1412b of the suction valve 1412 is not forcibly restricted. As a result, before the piston 132 moves to the bottom dead center, the reed valve portion 1412b of the suction valve 1412 continues to open, so that the refrigerant can be smoothly sucked into the compression chamber 130a.

[0144] Next, when the piston 132 further retreats until the stage c when the front end surface 132a of the piston 132 reaches the bottom dead center, the reed valve portion 1412b of the suction valve 1412 further bends significantly. As a result, the reed valve portion 1412b of the suction valve 1412, while in contact with the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413, is strongly subjected to the maximum elastic force of the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413. As a result, the reed valve portion 1412b of the suction valve 1412, while in contact with the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413, is restricted from opening and no longer bends. Thus, even if the reed valve portion 1412 b of the suction valve 1412 is greatly bent during high-load operation, it is possible to prevent the reed valve portion 1412 b of the suction valve 1412 from being damaged.

[0145] Next, if the piston 132 moves forward in the opposite direction (discharging stroke), the reed valve portion 1412b of the suction valve 1412 rotates in the opposite direction under the action of its own elastic force and closes the suction port 1411a. At this time, the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 push the reed valve portion 1412b of the suction valve 1412 in the closing direction under the action of the accumulated elastic force, so that the reed valve portion 1412b of the suction valve 1412 quickly closes the suction port 1411a. In this way, the leakage of the compressed refrigerant is blocked, thereby improving the compression efficiency. At the same time, since the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 are formed in a cantilever shape, in the stage d when the piston 132 reaches the top dead center, the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 are pressed and expanded by the piston 132. Thus, by minimizing the dead volume between the front end surface 132a of the piston 132 and the suction valve stopper 1413, the volumetric efficiency can be improved.

[0146] On the contrary, refer to Fig. 9 When the reciprocating compressor performs a low-load operation, the piston 132 reciprocates at a low speed. As a result, the reed valve portion 1412b of the suction valve 1412 is relatively slightly bent to open and close the suction port 1411a.

[0147] For example, in stage a when the piston 132 begins to retreat and the front end surface 132a of the piston 132 slightly moves away from the top dead center, the reed valve portion 1412b of the suction valve 1412 slightly bends. However, since the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413 are respectively separated from the suction valve 1412 by a preset interval, the reed valve portion 1412b of the suction valve 1412 does not contact the first contact portion 1418a3 and the second contact portion 1418b3 of the suction valve stopper 1413. Therefore, at the initial stage of the retreat of the piston 132, the reed valve portion 1412b of the suction valve 1412 is quickly opened, so that the refrigerant can be quickly sucked into the compression chamber 130a.

[0148] Next, in stage b, when the piston 132 further retreats and the front end surface 132a of the piston 132 further moves away from the top dead center, the reed valve portion 1412b of the suction valve 1412 further bends. However, the reed valve portion 1412b of the suction valve 1412 does not yet contact the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413, thereby maintaining a state in which the opening action is not restricted. Therefore, even if the piston 132 retreats further, the reed valve portion 1412b of the suction valve 1412 continues to open, so that the refrigerant can be smoothly sucked into the compression chamber 130a.

[0149] Next, when the piston 132 further retreats, the reed valve portion 1412b of the suction valve 1412 further bends significantly until the front end surface 132a of the piston 132 reaches the bottom dead center at stage c. However, even in this stage, the reed valve portion 1412b of the suction valve 1412 does not contact the first contact portion 1418a3 and the second contact portion 1418b3, or even if it contacts, it contacts only weakly, so that the reed valve portion 1412b of the suction valve 1412 opens smoothly. Therefore, even if the piston 132 retreats to the bottom dead center, the reed valve portion 1412b of the suction valve 1412 continues to open, so that the refrigerant can be smoothly sucked into the compression chamber 130a.

[0150] Next, if the piston 132 moves forward in the opposite direction (discharging stroke), the reed valve portion 1412b of the suction valve 1412 rotates in the opposite direction under the action of its own elastic force and closes the suction port 1411a. At this time, since the reed valve portion 1412b of the suction valve 1412 is not in a state of being greatly bent when opened, the suction port 1411a is closed while being rapidly expanded. At the same time, since the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 are formed in a cantilever shape, in stage d when the piston 132 reaches the top dead center, the first stopper portion 1418a and the second stopper portion 1418b of the suction valve stopper 1413 are pressed by the piston 132 and expanded. Thus, by minimizing the dead volume between the front end surface 132a of the piston 132 and the suction valve stopper 1413, the volumetric efficiency can be improved.

[0151] Fig.10 : is a graph showing the change in refrigeration power in each operating area when the suction valve stopper of this embodiment is applied, compared with the prior art. Fig.11 This is a graph showing changes in efficiency in each operating region when the suction valve stopper of this embodiment is applied, in comparison with the prior art.

[0152] Reference Fig.10 It can be confirmed that, in the case of applying the suction valve stopper 1413 of the present embodiment, the cooling power is improved in the high load operation area A2 compared with the low load operation area A1. In other words, it can be seen that, in the case of applying the suction valve stopper 1413 composed of an elastic member as in the present embodiment, the cooling power in the high load operation area A2 is significantly improved compared with the case where such a suction valve stopper 1413 is not applied (the prior art), for example, a valve plate composed of a rigid body (not shown) is installed on the front end surface 1315a of the cylinder 1315 or a valve receiving groove (not shown) is formed on the front end surface 1315a of the cylinder 1315. It can be confirmed that, especially in the high load operation area A2, as the operation speed increases, the cooling power gradually increases, and the maximum improvement is about 12% compared with the prior art. Therefore, it can be confirmed that when the suction valve stopper 1413 is formed of a material and / or shape having elastic force as in the present embodiment, the cooling capacity of the high-load operation area A2 can be greatly improved by fully ensuring the opening of the suction valve 1412.

[0153] On the other hand, refer to Fig.11It can be confirmed that when the suction valve stopper 1413 of the present embodiment is applied, the energy efficiency is improved not only in the high-load operation area A2, but also in the low-load operation area A1. In the low-load operation area A1, whether the energy efficiency is improved or not is a particularly important factor. It can be seen that the case of applying the suction valve stopper 1413 composed of an elastic member and bent in a manner separated from the suction valve 1412 as in the present embodiment, compared with the case where such a suction valve stopper 1413 is not applied (the prior art), for example, the case where a valve plate composed of a rigid body (not shown) is installed on the front end surface of the cylinder 1315 or a valve receiving groove (not shown) is formed on the front end surface 1315a of the cylinder 1315, the energy efficiency is improved by about 1%. This is also true in the high-load operation area A2. It can be confirmed that the faster the operation speed, the more the energy efficiency is improved compared with the prior art. Therefore, it can be confirmed that, as shown in this embodiment, by separating the suction valve stopper 1413 having elastic force from the suction valve 1412, the opening of the suction valve 1412 can be fully ensured, thereby improving the energy efficiency in the low-load operation area A1 and the high-load operation area A2.

[0154] On the other hand, other embodiments of the suction valve stopper will be described below.

[0155] That is, in the aforementioned embodiment, the stopper portions of the suction valve stopper are respectively arranged on both sides of the length direction of the reed valve portion of the suction valve, but depending on the situation, the stopper portion of the suction valve stopper may also be arranged only one on one side of the reed valve portion of the suction valve.

[0156] Fig.12 is a perspective view showing another embodiment of a suction valve stopper, Fig.13 Yes Fig.12 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view, Fig.14 yes Fig.13 “XV-XV” line sectional view.

[0157] Re-reference Figure 2The basic structure and effect of the reciprocating compressor having the suction valve stopper 1413 of the present embodiment are similar to those of the aforementioned embodiment. For example, in the reciprocating compressor, a piston 132 that reciprocates through the electric unit 120 and forms a compression chamber 130a inside the cylinder 1315 may be provided inside the cylinder 1315, and a suction and discharge part 140 that sucks refrigerant into the compression chamber 130a or discharges refrigerant from the compression chamber 130a according to the reciprocating motion of the piston 132 may be provided on the front end surface 1315a of the cylinder 1315. The suction and discharge part 140 may include a valve assembly 141, a suction muffler 142, and a discharge muffler 143, and the valve assembly 141 may include a valve plate 1411, a suction valve 1412, a suction valve stopper 1413, a discharge valve 1414, a discharge valve stopper 1415, and a discharge cover 1416.

[0158] The suction port 1411a may be formed eccentrically in the valve plate 1411 relative to the third center line CL3 passing through the radial center Oc of the compression chamber 130a, the reed valve portion 1412b that opens and closes the suction port 1411a may be formed in a cantilever shape in the suction valve 1412, and the suction valve stopper 1413 may be formed of an elastic member and bent toward the suction valve 1412. Thus, when the reed valve portion 1412b of the suction valve 1412 is greatly bent and opened, the reed valve portion 1412b of the suction valve 1412 contacts the stopper portion 1413b of the suction valve stopper 1413, and thus can be restricted to elastically open within an appropriate range or not to open excessively.

[0159] However, in this embodiment, the suction valve stopper 1413 may be composed of a stopper fixing portion 1413a and a stopper portion 1413b. In other words, in the aforementioned embodiment, the plurality of stopper portions 1418a and 1418b may be respectively provided on both sides of the stopper fixing portion 1413a with reference to the first center line CL1, but in this embodiment, one stopper portion 1413b may be extended long from the stopper fixing portion 1413a.

[0160] Reference Figure 12 to Figure 14 The stopper portion 1413b of this embodiment may include a fixing portion 1413b1, a bending portion 1413b2 and a contact portion 1413b3.

[0161] The fixing portion 1413b1 may extend from the inner circumferential surface of the stopper fixing portion 1413a and be fixed to the front end surface 1315a of the cylinder 1315 at the radial outer contour of the compression chamber 130a, the bending portion 1413b2 may extend from the fixing portion 1413b1 toward the radial center of the suction port 1411a and be bent in the radial inner part of the compression chamber 130a toward the direction away from the reed valve portion 1412b of the suction valve 1412, and the contact portion 1413b3 may extend from the bending portion 1413b2 and form a free end. The fixing portion 1413b1, the bending portion 1413b2 and the contact portion 1413b3 may be formed to be the same as or substantially similar to the first fixing portion 1418a1 and the second fixing portion 1418b1, the first bending portion 1418a2 and the second bending portion 1418b2, and the first contact portion 1418a3 and the second contact portion 1418b3 of the aforementioned embodiment, respectively. Therefore, the description of the fixing portion 1413b1, the bending portion 1413b2 and the contact portion 1413b3 is replaced by the description of the aforementioned embodiment.

[0162] In addition, in the present embodiment, the stopper portion 1413b of the suction valve stopper 1413 may be extended long along the length direction of the reed valve portion 1412b of the suction valve 1412. In other words, the stopper portion 1413b may be extended long from the inner peripheral surface of the stopper fixing portion 1413a along the first center line CL1, and the fixing portion 1413b1 of the stopper portion 1413b may be formed to be located on the opening and closing end 1412b2 side of the reed valve portion 1412b of the suction valve 1412 with reference to the second center line CL2 orthogonal to the first center line CL1. Thus, the bent portion 1413b2 and the contact portion 1413b3 of the stopper portion 1413b may be formed to extend from the suction port 1411a side of the stopper fixing portion 1413a toward the fixing end 1412b1 side of the reed valve portion 1412b. Thus, even if only one stopper portion 1413b is formed, the reed valve portion 1412b of the suction valve 1412 can be supported symmetrically and stably.

[0163] In addition, in this embodiment, since the stopper portion 1413b is formed on the suction port 1411a side eccentric to the radial center Oc of the compression chamber 130a, the length L31 of the bent portion 1413b2 can be smaller than the lengths L3, L3 of the bent portions 1418a2, 1418b2 of the aforementioned embodiment. As a result, the rigidity of the stopper portion 1413b is improved, so that the reed valve portion 1412b of the suction valve 1412 can be stably supported by only one stopper portion 1413b.

[0164] In this case, the width D32 of the bent portion 1413b2 may be smaller than the widths D2, D2 of the bent portions 1418a2, 1418b2 in the aforementioned embodiments. For example, the width D32 of the bent portion 1413b2 may be smaller than the width of the fixed portion 1413b1 (not shown). Thus, the opening of the suction valve 1412 can be ensured by appropriately reducing the rigidity of the bent portion 1413b2 while shortening the length L31 of the bent portion 1413b2.

[0165] In addition, the contact portion 1413b3 of this embodiment can be formed so that the radial center Os of the contact portion 1413b3 is eccentric toward the other end side of the reed valve portion 1412b, in other words, the opening and closing end 1412b2 side, relative to the radial center Oh of the suction port 1411a. Thus, by sufficiently ensuring the interval between the suction valve 1412 and the suction valve stopper 1413, it is possible to prevent the support force on the suction valve from increasing excessively at the initial opening stage. As a result, the suction valve 1412 opens smoothly, thereby increasing the amount of refrigerant suction.

[0166] In addition, the width D33 of the contact portion 1413b3 of the present embodiment may be greater than the width D32 of the bent portion 1413b2, and may be formed into a circular shape, for example. Thus, even if there is only one contact portion 1413b3, the reed valve portion 1412b of the suction valve 1412 may be stably supported. However, the contact portion 1413b3 may be as described above. Figure 3 In this case, the contact portion 1413b3 may be formed long along the second center line CL2 orthogonal to the first center line CL1, so that the reed valve portion 1412b of the suction valve 1412 can be stably supported.

[0167] As described above, in the case where the suction valve stopper 1413 is composed of one stopper portion 1413b, the shape of the stopper portion 1413b can be simplified, so that the suction valve stopper 1413 can be easily processed.

[0168] In this case, since the stopper portion 1413b is also formed to have elastic force, the opening of the suction valve 1412 can be fully ensured in low-load operation and high-load operation as in the above-mentioned embodiment, thereby improving the cooling capacity. At the same time, by appropriately limiting the opening of the reed valve portion in high-load operation, it is possible to suppress damage to the suction valve.

[0169] In addition, since the stopper portion 1413b is bent in a direction away from the reed valve portion 1412b of the suction valve 1412, the opening action of the reed valve portion 1412b when the suction valve 1412 is initially opened is not restricted during high-load operation and low-load operation. As a result, the suction valve 1412 is opened quickly and the energy efficiency during low-load operation can be improved.

[0170] In addition, when the piston 132 moves forward (discharging stroke), the reed valve portion 1412b of the suction valve 1412 is expanded according to the piston 132 and closes the suction port 1411a. At this time, the stopper portion 1413b of the suction valve stopper 1413 is also pushed by the piston 132 and expanded together with the reed valve portion 1412b of the suction valve 1412, and forms the same plane with the front end surface 1315a of the cylinder 1315. As a result, the front end surface 132a of the piston 132 can move forward to the front end surface 1315a of the cylinder 1315, thereby minimizing the generation of dead volume in the compression chamber 130a.

[0171] In addition, when the suction valve 1412 is closed as the piston 132 advances (discharging stroke), the reed valve portion 1412b of the suction valve 1412 can be pushed and closed by the stopper portion 1413b of the suction valve stopper 1413 having elastic force. As a result, the closing speed of the suction valve 1412 is increased, thereby improving the compression efficiency.

[0172] Although not shown, the stopper portion 1413b of the suction valve stopper 1413 may also extend from a position eccentric to the first center line CL1 toward the reed valve portion 1412b of the suction valve 1412. In other words, the stopper portion 1413b of the suction valve stopper 1413 may also be formed obliquely with the first center line CL1 as the center. In this case, the length of the stopper portion 1413b extends longer, so that the opening of the reed valve portion 1412b is expanded, thereby improving the cooling power.

[0173] On the other hand, still another embodiment of the suction valve stopper will be described below.

[0174] That is, in the aforementioned embodiment, the suction valve stopper is fastened to the cylinder together with the suction valve, but depending on circumstances, the suction valve stopper may be formed separately and fixed to the cylinder.

[0175] Fig.15 is a perspective view showing another embodiment of a suction valve stopper, Fig.16 Yes Fig.15 The suction valve and suction valve stopper are assembled to the cylinder barrel and shown in a top view, Fig.17 and Fig.18 yes Fig.16 The cross section of the "XⅧ-XⅧ" line, Fig.17is a diagram showing the suction stroke of the piston, Fig.18 It is a diagram showing the discharge stroke of the piston.

[0176] Re-reference Figure 2 The basic structure and effect of the reciprocating compressor having the suction valve stopper 1413 of the present embodiment are similar to those of the aforementioned embodiment. For example, in the reciprocating compressor, a piston 132 that reciprocates through the electric unit 120 and forms a compression chamber 130a inside the cylinder 1315 may be provided inside the cylinder 1315, and a suction and discharge part 140 that sucks refrigerant into the compression chamber 130a or discharges refrigerant from the compression chamber 130a according to the reciprocating motion of the piston 132 may be provided on the front end surface 1315a of the cylinder 1315. The suction and discharge part 140 may include a valve assembly 141, a suction muffler 142, and a discharge muffler 143, and the valve assembly 141 may include a valve plate 1411, a suction valve 1412, a suction valve stopper 1413, a discharge valve 1414, a discharge valve stopper 1415, and a discharge cover 1416.

[0177] The suction port 1411a may be formed eccentrically in the valve plate 1411 relative to the third center line CL3 passing through the radial center Oc of the compression chamber 130a, the reed valve portion 1412b that opens and closes the suction port 1411a may be formed in a cantilever shape in the suction valve 1412, and the suction valve stopper 1413 may be formed of an elastic member and bent toward the suction valve 1412. Thus, when the reed valve portion 1412b of the suction valve 1412 is greatly bent and opened, the reed valve portion 1412b of the suction valve 1412 contacts the stopper portion 1413b of the suction valve stopper 1413, and thus can be restricted to elastically open within an appropriate range or not to open excessively.

[0178] However, unlike the aforementioned embodiment, the suction valve stopper 1413 of this embodiment can be inserted and fixed to the cylinder 1315. In other words, the suction valve stopper 1413 can be formed by only a single stopper portion 1413b and exclude the stopper fixing portion 1413a of the aforementioned embodiment. In this case, the suction valve stopper 1413 can also be formed as Figure 3 As in the embodiment of the present invention, the plurality of components are configured and arranged on both sides based on the first center line CL1, or the plurality of components can be configured as shown in the embodiment of the present invention. Fig.12 As in the embodiment of the present invention, the stopper portion 1413b is composed of one and is arranged on the first center line CL1. Figure 3 The description will focus on an example in which the plurality of components are configured as in the embodiment and are arranged on both sides based on the first center line CL1.

[0179] Reference Figures 15 to 18The suction valve stopper 1413 of this embodiment may include a first stopper portion 1418a and a second stopper portion 1418b, which may be formed symmetrically to each other and respectively disposed on both sides with the first center line CL1 as a reference. Hereinafter, the first stopper portion 1418a is used as the center for description, and the description of the first stopper portion 1418a replaces the description of the second stopper portion 1418b.

[0180] The first stopper portion 1418a may include a first fixing portion 1418a1, a first bending portion 1418a2, and a first contact portion 1418a3. The first fixing portion 1418a1, the first bending portion 1418a2, and the first contact portion 1418a3 may be formed as described above. Figure 3 The first fixing portion 1418a1, the first bending portion 1418a2 and the first contact portion 1418a3 of the embodiment are the same or substantially similar. Figure 3 The description of the embodiment will replace the description of the first fixing portion 1418a1, the first bending portion 1418a2 and the first contact portion 1418a3.

[0181] However, in this embodiment, the stopper fixing portion is excluded from the suction valve stopper 1413, so that the first stopper portion 1418a can be formed separately, and the first fixing portion 1418a1 of the first stopper portion 1418a can be inserted and fixed to the front end surface 1315a of the cylinder 1315. For example, a first stopper fixing groove 1315b can be formed in the front end surface 1315a of the cylinder 1315, and the first fixing portion 1418a1 of the suction valve stopper 1413 can be inserted and fixed to the first stopper fixing groove 1315b. In this case, the first fixing portion 1418a1 of the suction valve stopper 1413 can be pressed and fixed by the valve plate 1411 together with the suction valve 1412 in a state of being inserted in the first stopper fixing groove 1315b, or can be fixed by welding. Thus, even if the stopper fixing portion is excluded from the suction valve stopper 1413, the first fixing portion 1418a1 of the suction valve stopper 1413 can be stably fixed between the cylinder 1315 and the suction valve 1412. Thus, as the stopper fixing portion is excluded from the suction valve stopper 1413, the material cost of the suction valve stopper 1413 can be saved accordingly.

[0182] In addition, the width and depth of the first stopper fixing groove 1315b of this embodiment can be formed to correspond to the width and depth of the first fixing portion 1418a1. Thus, the first stopper fixing groove 1315b can be formed in the cylinder 1315 while minimizing the dead volume generated thereby.

[0183] In addition, a first supporting protrusion 1418a5 may be formed at the end of the first fixing portion 1418a1 of the present embodiment, and a first supporting protrusion insertion groove 1315c may be formed in the first stopper fixing groove 1315b to allow the first supporting protrusion 1418a5 to be inserted. In other words, the first supporting protrusion 1418a5 may extend in a step-like manner from one side and / or both side surfaces of the first fixing portion 1418a1 in a direction intersecting with the length direction of the suction valve stopper 1413, and the first supporting protrusion insertion groove 1315c may extend in a step-like manner from one side and / or both side surfaces of the first stopper fixing groove 1315b in a direction intersecting with the length direction of the suction valve stopper 1413. Thus, as Fig.17 As shown, when the piston 132 retreats (intake stroke), the first support protrusion 1418a5 of the intake valve stopper 1413 can be inserted into the first support protrusion insertion groove 1315c of the cylinder 1315 and supported in the radial direction. Thus, even if the first stopper portion 1418a constituting the intake valve stopper 1413 is formed separately without a stopper fixing portion, the first stopper portion 1418a can be fixed to the front end surface 1315a of the cylinder 1315 more stably.

[0184] In addition, the front end surface 132a of the piston 132 of the present embodiment may be formed with a first stopper insertion groove 132b so that the first contact portion 1418a3 of the suction valve stopper 1413 can be inserted. In other words, the front end surface 132a of the piston 132 may be formed flat, and a first stopper insertion groove 132b recessed in accordance with the width and thickness of the first contact portion 1418a3 of the suction valve stopper 1413 may be formed at a portion corresponding to the first contact portion 1418a3 of the suction valve stopper 1413. Fig.18 As shown, when the piston 132 advances (discharging stroke), the piston 132 can advance to the front end surface 1315a of the cylinder 1315 in contact with the suction valve 1412. Thus, the suction valve stopper 1413 can be composed of a single first stopper portion 1418a while suppressing the generation of dead volume.

Claims

1. A reciprocating compressor, wherein: include: shell; A driving motor is disposed in the inner space of the housing; a drive shaft coupled to a rotor of the drive motor; a piston, coupled to the drive shaft and performing reciprocating motion; A cylinder, in which the piston can be reciprocatedly inserted, and the cylinder and the piston together form a compression chamber; a valve plate, coupled to the front end surface of the cylinder in a manner facing the piston, and having a suction port and a discharge port for communicating with the compression chamber; A suction valve is provided between the cylinder and the valve plate, and is provided with a reed valve portion at the other end for opening and closing the suction port with one end as the center; and a suction valve stopper, disposed between the suction valve and the cylinder, supporting a reed valve portion of the suction valve to limit an opening of the reed valve portion; The suction valve stopper is formed of an elastic member.

2. The reciprocating compressor according to claim 1, wherein: The rigidity of the suction valve stopper is greater than or equal to the rigidity of the suction valve.

3. The reciprocating compressor according to claim 1, wherein: The suction valve stopper is provided with at least one stopper portion extending toward the radial center of the suction port to overlap with one side surface of the reed valve portion. The stopper portion is bent in a direction away from the reed valve portion to be spaced apart from the reed valve portion.

4. The reciprocating compressor according to claim 3, wherein: The stopper portion comprises: A fixing portion fixed to the front end surface of the cylinder barrel at the radial outer contour of the compression chamber; a bent portion extending from the fixed portion toward the radial center of the suction port and bent in a radially inner portion of the compression chamber toward a direction away from the reed valve portion of the suction valve; and a contact portion extending from the bent portion and contacting the reed valve portion when the reed valve portion is opened; The bent portion is formed to be located between an inner peripheral surface of the compression chamber and an outer peripheral surface of the reed valve portion in a radial direction.

5. The reciprocating compressor according to claim 4, wherein: The length from the bent portion to the end of the contact portion is smaller than the length of the reed valve portion.

6. The reciprocating compressor according to claim 4, wherein: The suction valve stopper is formed with a valve accommodating portion corresponding to the reed valve portion of the suction valve. The contact portion of the stopper portion is accommodated inside the valve accommodation portion.

7. A reciprocating compressor, wherein: include: piston; A cylinder, wherein the piston is reciprocatably inserted into the cylinder, and the cylinder and the piston together form a compression chamber; a valve plate, coupled to the front end surface of the cylinder in a manner facing the piston, and having a suction port and a discharge port for communicating with the compression chamber; A suction valve, disposed between the cylinder and the valve plate, comprising a valve fixing portion and a reed valve portion, wherein the valve fixing portion is coupled to the cylinder, and one end of the reed valve portion extends from the valve fixing portion so that the other end opens and closes the suction port; as well as A suction valve stopper, disposed between the suction valve and the cylinder, to limit the opening of the suction valve; The suction valve stopper comprises: a stopper fixing portion, combined with the valve fixing portion to the cylinder; as well as At least one stopper portion extends from the stopper fixing portion toward the radial center of the suction port so as to overlap at least a portion of the reed valve portion in the reciprocating direction of the piston.

8. The reciprocating compressor according to claim 7, wherein: The stopper portion comprises: A first stopper portion is disposed on one side with the length direction of the reed valve portion as the center; and a second stopper portion, arranged at the other side with the length direction of the reed valve portion as the center, and spaced apart from the first stopper portion; The first stopper portion and the second stopper portion are formed symmetrically to each other with the longitudinal direction of the reed valve portion as a center.

9. The reciprocating compressor according to claim 8, wherein: The first stopper portion and the second stopper portion are respectively provided in a direction orthogonal to a longitudinal direction of the reed valve portion.

10. A reciprocating compressor, wherein: include: piston; A cylinder, wherein the piston is reciprocatably inserted into the cylinder, and the cylinder and the piston together form a compression chamber; a valve plate, coupled to the front end surface of the cylinder in a manner facing the piston, and having a suction port and a discharge port for communicating with the compression chamber; A suction valve, disposed between the cylinder and the valve plate, comprising a valve fixing portion and a reed valve portion, wherein the valve fixing portion is coupled to the cylinder, and one end of the reed valve portion extends from the valve fixing portion so that the other end opens and closes the suction port; as well as A suction valve stopper, disposed between the suction valve and the cylinder, to limit the opening of the suction valve; The suction valve stopper is formed of at least one separate member and is fixed to the front end surface of the cylinder.

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