Compressor

Abstract

A compressor is disclosed. In the compressor, at least two or more supporting points for supporting the opening direction of the discharge valve of the valve stopper may be formed. By this means, the discharge valve cancels the torsional moment and / or torque generated when the discharge valve is opened and closed by shortening the length of the moment arm, and not only can improve compression efficiency by suppressing operational instability that may occur when the discharge valve is opened and closed, but also can reduce valve knock noise to improve compressor noise.

Description

Technical Field

[0001] The present invention relates to a compressor having a discharge valve. Background Art

[0002] Compressors can be classified into a hermetic type in which an electric unit and a compression unit are disposed together inside a housing, and an open type in which the electric unit and the compression unit are independently disposed inside the housing. In the present embodiment, a hermetic compressor will be mainly described, but the present invention can be similarly applied to the open type.

[0003] Compressors can be classified into reciprocating, rotary, vane, scroll, etc. according to the method of compressing refrigerant. A rotary compressor, a vane compressor, and a scroll compressor each have their own independent suction valve and discharge valve, while a reciprocating compressor has an assembly formed by combining a suction valve and a discharge valve.

[0004] When the suction valve and the discharge valve are independently provided in a reciprocating compressor, the installation space for the valves is relatively large, so the degree of freedom in valve design is high, but the assembly man-hours increase. On the contrary, when the suction valve and the discharge valve are formed as one assembly, the installation space for the valves is narrow, so the degree of freedom in valve design is low, but the assembly man-hours are reduced.

[0005] Patent Document 1 (Japanese Patent Laid-Open No. 2009-299491) and Patent Document 2 (Japanese Patent Laid-Open No. 2011-520059) each disclose a reciprocating compressor in which a suction valve and a discharge valve are formed as one valve assembly and the valve assembly is installed.

[0006] Patent Document 1 is a case of a valve assembly having one discharge valve, and Patent Document 2 is a case of a valve assembly having a plurality of discharge valves. Compared with the case where there are a plurality of discharge valves as in Patent Document 2, when there is one discharge valve as in Patent Document 1, the number of components is relatively small, so it is easy to manufacture and assemble.

[0007] However, if the discharge capacities of the compressors are the same, the discharge port of Patent Document 1 needs to be formed wider than the discharge port of Patent Document 2. Thus, compared with the discharge valve of Patent Document 2, the valve rigidity of the discharge valve of Patent Document 1 increases. As a result, compared with the discharge valve of Patent Document 2, the responsiveness of the discharge valve of Patent Document 1 decreases, and pressure loss may occur. For this reason, a valve spring for elastically supporting the discharge valve is additionally provided in Patent Document 1 to increase the closing speed of the valve. This increases the number of components of the valve assembly, thereby increasing the manufacturing cost.

[0008] In the case of Patent Document 2, since the discharge ports are separated into a plurality of ports, the inner diameter of each discharge port may be smaller than that of the discharge port of Patent Document 1. Accordingly, Patent Document 2 can reduce the valve rigidity of the discharge valve to eliminate the valve spring. However, in Patent Document 2, based on the characteristics of the reed valve, the length of the torque arm increases, which not only causes unstable opening and closing operations, but also increases the collision noise due to an increase in torque. This drawback also exists in Patent Document 1.

[0009] More seriously, in Patent Document 2, since a plurality of opening / closing ends extend from one fixed end, the stresses on both sides of each opening / closing end are different, resulting in an increase in the torsional moment in each opening / closing end. As a result, the movement of the valve becomes more unstable, and thus the compression efficiency may decrease. Summary of the Invention

[0010] Problems to be Solved by the Invention

[0011] An object of the present invention is to provide a compressor capable of stabilizing the operation of a valve when a discharge valve opens and closes.

[0012] Another object of the present invention is to provide a compressor capable of canceling a torsional moment to stabilize the operation when a discharge valve opens and closes.

[0013] Still another object of the present invention is to provide a compressor capable of canceling a torsional moment and / or a torque when a discharge valve opens and closes by shortening the length of a torque arm.

[0014] Still another object of the present invention is to provide a compressor capable of reducing valve knocking noise generated when a discharge valve opens and closes.

[0015] Still another object of the present invention is to provide a compressor capable of smoothly opening and closing a discharge port while eliminating a valve spring.

[0016] Technical Solution for Solving the Problem

[0017] To achieve the object of the present invention, a compressor including a cylinder block, a valve plate, a discharge valve, a discharge cover, and a valve stopper may be provided. The cylinder block may have a compression chamber to suck and compress a refrigerant. The valve plate may be coupled to the cylinder block and have a discharge port to communicate with the compression chamber. The discharge valve may be disposed on one side of the valve plate opposite to the cylinder block to open and close the discharge port. The discharge cover may be disposed on one side of the discharge valve opposite to the valve plate, coupled to the cylinder block, and accommodate the discharge port. The valve stopper may be disposed between the discharge valve and the discharge cover to support the discharge valve on the valve plate. In the valve stopper, at least two or more support points may be formed, and the support points support the opening direction of the discharge valve. Through this, the discharge valve can cancel the torsional moment and / or torque generated when the discharge valve opens and closes by shortening the length of the moment arm, not only can suppress the possible action instability when the discharge valve opens and closes to improve the compression efficiency, but also can reduce the valve knocking sound to improve the compressor noise.

[0018] As an example, the valve stopper may include: a valve fixing part disposed at one end of the valve stopper and in close contact with the discharge valve; and a valve support part extending from the valve fixing part, with the discharge valve fitting or separating from the valve support part; at least one or more of the support points may be formed between both ends in the length direction of the valve support part. Through this, not only can suppress the possible action instability between the valve plate and the valve support part when the discharge valve opens and closes, but also can reduce the valve knocking sound with the valve support part.

[0019] For example, in the valve stopper, a first-order support point may be formed between the valve fixing part and the valve support part, and a second-order support point may be formed in the middle of the length direction of the valve support part. Through this, when the discharge valve opens, the discharge valve first contacts at the first-order support point and then contacts at the second-order support point, so that the moment arm can be shortened under the condition that the overall length of the discharge valve is the same.

[0020] Specifically, in the valve support part, a second length from the first-order support point to the second-order support point may be greater than or equal to a first length of the valve fixing part. Through this, the second-order support point is made as far away from the valve fixing point as possible, so that while effectively suppressing the action instability of the discharge valve, the valve knocking sound can be further reduced.

[0021] Specifically, in the valve support part, a second length from the first-order support point to the second-order support point may be greater than or equal to a third length from the second-order support point to the end of the valve support part. Through this, it is possible to suppress an excessive increase in the rigidity of the fixed end portion side of the discharge valve, thereby preventing the discharge resistance caused by the delayed opening of the discharge valve.

[0022] Specifically, in the valve support portion, the second length from the first-order support point to the second-order support point may be greater than or equal to the first length of the valve fixing portion. The second length from the first-order support point to the second-order support point may be greater than or equal to the third length from the second-order support point to the end of the valve support portion. The second length may be less than or equal to the third length. By this, while being able to reduce the operation instability of the discharge valve and the valve knocking sound, the excessive increase in the rigidity of the fixed end portion side of the discharge valve can be suppressed, thereby preventing the discharge resistance caused by the delayed opening of the discharge valve.

[0023] As another example, the first height between the valve fixing portion and the valve support portion may be less than or equal to the second height between both ends of the valve support portion. By this, at the initial stage of the opening of the discharge valve, the opening amount of the discharge valve can be quickly restricted for the first time, effectively suppressing the operation instability of the discharge valve while further reducing the valve knocking sound.

[0024] As still another example, a valve buffer portion may be formed on the valve support surface of the valve support portion facing the discharge valve. By this, when the discharge valve opens, the opening speed of the discharge valve can be moderated, further stabilizing the operation of the discharge valve while further reducing the valve knocking sound.

[0025] For example, the valve support portion may include: a first-order valve support portion extending from the valve fixing portion; and a second-order valve support portion extending from the first-order valve support portion, with a support point provided therebetween and the first-order valve support portion. The valve buffer portion may be formed on the first-order valve support portion. By this, at the initial stage of the opening of the discharge valve, the back surface of the discharge valve can be buffered, further stabilizing the operation of the discharge valve while further reducing the valve knocking sound.

[0026] Specifically, the valve buffer portion may be formed by being recessed from the valve support surface or penetrating through the valve support surface. By this, refrigerant and / or oil can be stored between the back surface of the discharge valve and the valve stopper facing it, further stabilizing the operation of the discharge valve while further reducing the valve knocking sound.

[0027] Specifically, the valve buffer portion may be formed obliquely on the valve support surface. By this, while stabilizing the operation of the discharge valve and reducing the valve knocking sound, the interval between the valve plate and the valve stopper can be ensured, thereby reducing the discharge resistance at the initial stage of opening.

[0028] As another example, a plurality of discharge ports may be provided, and the discharge valve may be composed of a fixed end portion and a plurality of opening / closing end portions extending from the fixed end portion. The valve stopper may be composed of a valve fixing portion and a plurality of valve support portions extending from the fixed end portion. In the plurality of valve support portions, inclined suppression portions extending radially may be respectively formed. By this, even when the plurality of opening / closing end portions extend from one fixed end portion, the plurality of opening / closing end portions can be opened and closed as stably as possible.

[0029] For example, the plurality of valve support portions may respectively extend from both sides in the length direction of the valve fixing portion in a direction intersecting the length direction of the valve fixing portion. The inclined suppression portion may extend from the opposite side of the surface where the plurality of valve support portions face each other. By this, even when the plurality of opening / closing end portions are subjected to a force in the direction of opening toward each other, the inclined suppression portion can cancel it out, and the plurality of opening / closing end portions can be opened and closed stably.

[0030] Specifically, the inclined suppression portion may be formed on the opposite side of the valve fixing portion with reference to an imaginary line connecting the centers of the plurality of valve support portions. By this, the force in the direction of opening toward each other received by the plurality of opening / closing end portions can be more effectively canceled out, and the plurality of opening / closing end portions can be opened and closed more stably.

[0031] For example, in the plurality of valve support portions, support protrusions extending radially may be respectively formed. The inclined suppression portion may extend radially between the support protrusion and the valve support portion. By this, while the inclined suppression portion can be easily formed, the strength of the inclined suppression portion and the support protrusion can be ensured.

[0032] Advantages of the Invention

[0033] In the compressor of the present embodiment, at least two or more support points for supporting the opening direction of the discharge valve may be formed on the valve stopper. By this, the discharge valve cancels the torsional moment and / or torque generated when the discharge valve opens and closes by shortening the length of the moment arm, and can not only suppress the action instability that may occur when the discharge valve opens and closes to improve the compression efficiency, but also reduce the valve knocking sound to improve the compressor noise.

[0034] In addition, the valve stopper of the compressor of the present embodiment includes: a valve fixing portion provided at one end of the valve stopper and closely attached to the discharge valve; and a valve support portion extending from the valve fixing portion, and the discharge valve fits or separates from the valve support portion; at least one or more of the support points may be formed between both ends in the length direction of the valve support portion. By this, not only can the action instability that may occur between the valve plate and the valve support portion when the discharge valve opens and closes be suppressed, but also the valve knocking sound with the valve support portion can be reduced.

[0035] In addition, in the compressor of the present embodiment, the first height between the valve fixing portion and the valve support portion may be less than or equal to the second height between both ends of the valve support portion. By this, the opening amount of the discharge valve can be quickly restricted for the first time at the initial stage of the opening of the discharge valve, and while effectively suppressing the action instability of the discharge valve, the valve knocking sound can be further reduced.

[0036] In addition, in the compressor of the present embodiment, a valve buffer portion may be formed on the valve support surface of the valve support portion facing the discharge valve. By this, the opening speed of the discharge valve when the discharge valve opens can be alleviated, while further stabilizing the action of the discharge valve and further reducing the valve knocking sound.

[0037] In addition, in the compressor of the present embodiment, the valve stopper may be composed of one valve fixing portion and a plurality of valve support portions extending from one fixed end portion, and radially extending inclination suppressing portions may be respectively formed on the plurality of valve support portions. By this, even when a plurality of opening / closing end portions extend from one fixed end portion, the plurality of opening / closing end portions can be opened and closed as stably as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is a perspective view of the housing of the reciprocating compressor of the present embodiment, showing its interior in a three-dimensional view.

[0039] Figure 2 is a view showing Figure 1 the interior of the reciprocating compressor in a sectional view.

[0040] Figure 3 is a view showing Figure 2 the valve assembly in the

[0041] Figure 4 is a three-dimensional view showing the valve stopper from the discharge cover side in Figure 3 the

[0042] Figure 5 is a three-dimensional view showing the valve stopper from the cylinder side in Figure 3 the

[0043] Figure 6 is a Figure 5 top view of

[0044] Figure 7 is a Figure 5 side view of

[0045] Figure 8 is a view showing the discharge system of the valve assembly in Figure 3 the

[0046] Figure 9 is a Figure 7 "X-X" line sectional view of

[0047] Figure 10 is Figure 7 a sectional view taken along line "XI-XI".

[0048] Figures 11a to 11c are a plurality of schematic views shown for explaining the opening operation of the discharge valve.

[0049] Figure 12 is a sectional view showing another embodiment of the valve stopper.

[0050] Figure 13 is a perspective view showing still another embodiment of the valve stopper. DETAILED DESCRIPTION

[0051] Hereinafter, the compressor of the present invention will be described in detail based on an embodiment shown in the drawings. As described above, the compressor is provided with a discharge valve that intercepts the refrigerant in the compression chamber and regulates the compression and discharge of the refrigerant intercepted in the compression chamber. Depending on the compression method, the discharge valve may be provided together with the suction valve, or may be provided separately from the suction valve. In the present embodiment, a connected reciprocating compressor in which the discharge valve and the suction valve are provided together will be mainly described. However, it is not limited to the connected reciprocating compressor, and the same can be applied to a compressor in which a valve assembly is composed of a discharge valve and a suction valve and the valve assembly is used.

[0052] In addition, the discharge valve may be provided individually, or a plurality of discharge valves may be provided independently of each other, or a plurality of discharge valves may be connected to each other. In the present embodiment, an example in which a plurality of discharge valves are connected to each other will be mainly described. However, it can also be applied to the case where one discharge valve or a plurality of discharge valves are provided independently.

[0053] In addition, hereinafter, with the piston as the center, the compression chamber side will be defined as the front, and the opposite side will be defined as the rear for explanation. In association with this, in the valve assembly, the side where the discharge valve is open will be defined as the front, and the side where the discharge valve is closed will be defined as the rear for explanation.

[0054] Figure 1 is a perspective view of the housing of the reciprocating compressor of the present embodiment, showing the inside thereof, Figure 2 is showing Figure 1 a sectional view of the inside of the reciprocating compressor of Figure 3 is disassembling Figure 2 the valve assembly in

[0055] Referring to Figure 1 and Figure 2, the reciprocating compressor of this embodiment includes: a housing 110 that forms the appearance; an electric unit 120 disposed in the internal space 110a of the housing 110 and providing driving force; a compression unit 130 that receives the driving force from the electric unit 120 to compress the refrigerant; a suction / discharge unit 140 that guides the refrigerant to the compression chamber and discharges the compressed refrigerant; and a support unit 150 that supports the compressor main body C including the electric unit 120 and the compression unit 130 in the housing.

[0056] The housing 110 includes a lower housing 111 and an upper housing 112. The lower housing 111 and the upper housing 112 are combined to form a sealed internal space 110a. The electric unit 120 and the compression unit 130 are accommodated in the internal space 110a of the housing 110. The housing 110 can be made of lightweight and high thermal conductivity aluminum alloy (hereinafter, simply referred to as aluminum).

[0057] The lower housing 111 is formed in a substantially hemispherical shape. The suction pipe 115, the discharge pipe 116, and a process pipe (not shown) are respectively penetrated and combined with the lower housing 111. These suction pipe 115, discharge pipe 116, and process pipe (not shown) can be combined with the lower housing 111 through an insert molding process.

[0058] The upper housing 112 is formed in a substantially hemispherical shape similar to the lower housing 111. The upper housing 112 is combined with the lower housing 111 on the upper side of the lower housing 111 to form the internal space 110a of the housing 110.

[0059] In addition, the upper housing 112 and the lower housing 111 can be combined by welding. However, in the case where the lower housing 111 and the upper housing 112 are made of aluminum material that is difficult to weld, they can be fastened by bolts.

[0060] Refer to Figure 1 and Figure 2 , the electric unit 120 of this embodiment includes a stator 121 and a rotor 122.

[0061] The stator 121 can be elastically supported on the bottom surface of the internal space 110a of the housing 110, that is, the bottom surface of the lower housing 111, and the rotor 122 is rotatably disposed inside the stator 121.

[0062] The stator 121 of this embodiment includes a stator core 1211 and a stator coil 1212.

[0063] The stator core 1211 is made of a metal material such as electrical steel sheet. When a voltage is applied to the electric unit 120 from the outside, the stator core 1211, together with the stator coil 1212 and the rotor 122 described later, performs an electromagnetic interaction caused by electromagnetic force.

[0064] In addition, the stator core 1211 is formed in a substantially quadrilateral cylindrical shape. For example, the inner peripheral surface of the stator core 1211 can be formed into a circular shape, while its outer peripheral surface can be formed into a quadrilateral shape. The stator core 1211 is fixed to the bottom surface of the main bearing 131 by means of stator fastening bolts (not shown).

[0065] In addition, in a state where the stator core 1211 is axially and radially spaced apart from the inner surface of the housing 110, the lower end of the stator core 1211 is supported by a support spring 151 (described later) on the bottom surface of the housing 110. Thereby, it is possible to suppress the vibration generated during operation from being directly transmitted to the housing 110.

[0066] The stator coil 1212 is wound inside the stator core 1211. As described above, when a voltage is applied from the outside, the stator coil 1212 generates an electromagnetic force and performs electromagnetic interaction together with the stator core 1211 and the rotor 122. Thereby, the electric unit 120 generates a driving force for reciprocating the compression unit 130.

[0067] The rotor 122 of the present embodiment includes a rotor core 1221 and a magnet 1222.

[0068] Similar to the stator core 1211, the rotor core 1221 is made of a metal material such as electrical steel sheet and can be formed in a substantially cylindrical shape. A crankshaft 125 (described later) is press-fitted and joined to the center of the rotor core 1221.

[0069] The magnet 1222 can be formed of a permanent magnet and can be inserted and joined to the rotor core 1221 at equal intervals in the circumferential direction of the rotor core 1221. When a voltage is applied, the rotor 122 rotates through electromagnetic interaction with the stator core 1211 and the stator coil 1212. Thereby, while rotating together with the rotor 122, the crankshaft 125 transmits the rotational force of the electric unit 120 to the compression unit 130 via the connecting rod 126.

[0070] Refer to Figure 1 and Figure 2 , the compression unit 130 of the present embodiment includes a main bearing 131 and a piston 132. The main bearing 131 is elastically supported by the housing 110, and the piston 132 is coupled to the crankshaft 125 by means of a connecting rod 126 to perform relative movement with respect to the main bearing 131.

[0071] The main bearing 131 is provided on the upper side of the electric unit 120. The main bearing 131 may include: a frame portion 1311; a fixed convex portion 1312 coupled to the stator 121 of the electric unit 120; a bearing portion 1313 that supports the drive shaft 125; and a cylinder portion (cylinder) 1315 that forms a compression chamber 130a.

[0072] 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 reducing the weight of a part of the edge other than the corners.

[0073] The fixing convex portion 1312 is formed at the edge of the frame portion 1311. For example, the fixing convex portion 1312 may be formed to protrude downward from the edge of the frame portion 1311 toward the electric unit 120.

[0074] The main bearing 131 can be fastened to the stator 121 by the stator fastening bolt 215, and together with the stator 121 of the electric unit 120, is elastically supported by the lower housing 111.

[0075] The bearing portion 1313 may be formed to extend from the central portion of the frame portion 1311 toward both axial sides. A bearing hole 1313a may be formed axially through the bearing portion 1313 so that the crankshaft 125 passes through, and a bush bearing may be inserted and coupled to the inner circumferential surface of the bearing hole 1313a.

[0076] The plate portion 1253 of the crankshaft 125 may be axially supported at the upper end of the bearing portion 1313, and the supported portion 1252 of the crankshaft 125 may be radially supported at the inner circumferential surface of the bearing portion 1313. Thus, the crankshaft 125 can be supported by the main bearing 131 both axially and radially.

[0077] The cylinder portion (hereinafter simply referred to as the cylinder) 1315 is formed eccentrically in the radial direction from one 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 open end, and a valve assembly 141 constituting a suction / discharge portion 140 described later may be installed at the outer open end.

[0078] An opening is formed on one side (rear side) of the piston 132 facing the connecting rod 126, and the front side on the opposite side is formed in a closed shape. Thus, the connecting rod 126 is inserted into the rear side of the piston 132 and is rotatably coupled to the piston 132. The front side of the piston 132 is formed in a closed shape, and together with the valve assembly 141 described later, a compression chamber 130a is formed inside the cylinder 1315.

[0079] Refer to Figure 1 and Figure 3 , the suction / discharge portion 140 of the present embodiment includes a valve assembly 141, a suction muffler 142, and a discharge muffler 143. The valve assembly 141 and the suction muffler 142 are sequentially coupled to the open end of the cylinder 1315.

[0080] The valve assembly 141 includes a valve plate 1411, a suction valve 1412, a discharge valve 1413, a valve stopper 1414, and a discharge cover 1415.

[0081] 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 1315a. 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.

[0082] The two side surfaces of the valve plate 1411 may be formed substantially flat and a plurality of suction ports 1411a and discharge ports 1411b may be formed in the center. However, depending on the situation, one suction port 1411a and / or one discharge port 1411b may be formed respectively. The valve plate 1411 will be described again together with the discharge system later.

[0083] The suction valve 1412 may be formed as a quadrilateral plate body made of a thin steel plate, and may be arranged on the side facing the piston 132, that is, the rear side, with respect to the valve plate 1411. Thus, the suction valve 1411 is bent toward the piston 132 to open and close.

[0084] The discharge valve 1413 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 1413 may be opened and closed by bending in a direction away from the piston 132. The discharge valve 1413 will be described again later together with the discharge system.

[0085] The valve stopper 1414 may be disposed between the discharge valve 1413 and the discharge cover 1415. Thus, the valve stopper 1414 can fix the discharge valve 1413 by pressing it against the valve plate 1411. The valve stopper 1414 will be described again later together with the discharge system.

[0086] The discharge cover 1415 is fastened to the front end surface of the main bearing 131 via the suction valve 1412 and the valve plate 1411, and finally covers the compression chamber 1315a. Therefore, the discharge cover 1415 can be defined as a cylinder cover.

[0087] A discharge chamber 1415a is formed on the inner side of the discharge cover 1415, and a muffler fixing portion (not shown) may be formed in the center of the discharge chamber 1415a for inserting and supporting a connecting portion (not shown) of the suction muffler 142 described later. A stopper pressing portion (not shown) for fixing the valve stopper 1414 by pressing both ends thereof may be formed around the muffler fixing portion.

[0088] Reference Figure 1 and Figure 2 The suction muffler 142 of this embodiment transfers the refrigerant sucked through the suction pipe 115 to the compression chamber 1315a of the cylinder 1315. The suction muffler 142 may be fixed by the valve assembly 141 and communicate with the suction port 1411a of the valve plate 1411.

[0089] An intake space portion (not labeled) may be formed inside the intake muffler 142. The inlet of the intake space portion may be directly or indirectly communicated with the intake pipe 115, and the outlet of the intake space portion may be directly communicated with the intake side of the valve assembly 141.

[0090] The discharge muffler 143 of this embodiment may be separately provided from the main bearing 131. A discharge space portion (not labeled) may be formed inside the discharge muffler 143. The inlet of the discharge space portion may be connected to the discharge side of the valve assembly 141 through a loop pipe 118, and the outlet of the discharge space portion may be directly connected to the discharge pipe 116 through the loop pipe 118.

[0091] Refer to Figure 1 and Figure 2 As shown in, the support portion 150 of this embodiment supports between the bottom surface of the electric unit 120 and the bottom surface of the lower housing 111 opposite thereto. Generally, the four corners of the electric unit 120 are supported by the housing 110. For example, the support portion 150 includes a support spring 151, a first spring cap 152 that supports the lower end of the support spring, and a second spring cap 153.

[0092] The reference numeral 1255 not described in the drawings is an oil feeder.

[0093] The reciprocating compressor of this embodiment described above operates as follows.

[0094] That is, when power is applied to the electric unit 120, the rotor 122 rotates. When the rotor 122 rotates, the crankshaft 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 with respect to the cylinder 1315 through the connecting rod 126.

[0095] For example, if the piston 132 retracts in the cylinder 1315, the volume of the compression chamber 1315a increases. If the volume of the compression chamber 1315a increases, the refrigerant filled in the intake muffler 142 is sucked into the compression chamber 1315a of the cylinder 1315 through the intake valve 1412 of the valve assembly 141.

[0096] Conversely, if the piston 132 advances in the cylinder 1315, the volume of the compression chamber 1315a decreases. If the volume of the compression chamber 1315a decreases, the refrigerant filled in the compression chamber 1315a is compressed and discharged to the discharge chamber 1415a of the discharge cover 1415 through the discharge valve 1413 of the valve assembly 141. The refrigerant moves to the discharge space portion of the discharge muffler 143 through the loop pipe 118, and then is discharged to the refrigeration cycle through the loop pipe 118 and the discharge pipe 116, and the above series of processes are repeatedly executed.

[0097] The discharge valve 1413 can be opened and closed by utilizing the pressure difference between the compression chamber 1315a and the discharge chamber 1415a, as well as the elastic force of the discharge valve 1413. For example, during the suction stroke of the piston 132, the pressure in the compression chamber 1315a is lower than the pressure in the discharge chamber 1415a, causing the discharge valve 1413 to be pushed by the pressure in the discharge chamber 1415a and close.

[0098] Conversely, during the discharge stroke of the piston 132, the pressure in the compression chamber 1315a is higher than the pressure in the discharge chamber 1415a. Thus, the discharge valve 1413 is pushed by the pressure in the compression chamber 1315a and bends and opens about the fixed end portion 1413a described below.

[0099] Here, a valve stopper that functions as a positioner is provided on the open side (front side) of the discharge valve 1413 to limit the opening amount of the discharge valve. However, in the existing valve stopper, one side surface facing the discharge valve is formed by a single curve. Therefore, when the discharge valve opens and closes, the movement of the discharge valve may be unstable. In other words, due to the lack of a turning fulcrum on the valve support surface of the valve stopper that supports the discharge valve, the discharge valve is subjected to an unattenuated torsional moment caused by a long moment arm. As a result, when the discharge valve opens and closes, the opening and closing end portion of the discharge valve twists and the operation is unstable, which may reduce the compression efficiency. Moreover, the long moment arm of the discharge valve may increase the collision noise.

[0100] In response to this, in the present embodiment, when the discharge valve opens and closes, it is possible to shorten the moment arm to stabilize the operation of the discharge valve and reduce the collision noise caused by valve knocking.

[0101] Figure 4 It is shown from the discharge cover side Figure 3 A perspective view of the valve stopper in Figure 5 It is shown from the cylinder side Figure 3 A perspective view of the valve stopper in Figure 6 It is Figure 5 The top view of Figure 7 It is Figure 5 The side view of Figure 8 It is to Figure 3 Show the top view of the discharge system assembly of the valve assembly in Figure 9 It is Figure 7 The "X-X" line cross-sectional view of Figure 10 It is Figure 7 The "XI-XI" line cross-sectional view of

[0102] Refer to again Figure 3, in the valve assembly 141 of the present embodiment, the suction system and the discharge system are respectively disposed on both sides with the valve plate 1411 therebetween. For example, the suction system of the valve assembly 141 includes the valve plate 1411 and the suction valve 1412 and is disposed on the side of the cylinder 1315, and the discharge system includes the valve plate 1411 and the discharge valve 1413 and is disposed on the opposite side of the cylinder 1315. Hereinafter, excluding the suction system, the description will be centered on the discharge system. Thus, hereinafter, the discharge system will be collectively referred to as the valve assembly for description.

[0103] Referring to Figure 3 and Figure 4 , the valve assembly 141 of the present embodiment excludes the suction valve 1412 as described above and includes the valve plate 1411, the discharge valve 1413, and the valve stopper 1414.

[0104] As described above, the two side surfaces of the valve plate 1411 are formed to be substantially flat, but the discharge port 1411b can be formed through between the two side surfaces at the central portion of the valve plate 1411. A discharge guide groove 1411c can be recessed and formed around the discharge port 1411b to surround the discharge port 1411b. Thus, the length of the discharge port 1411b is formed to be smaller than the thickness of the valve plate 1411, so that the useless volume in the discharge port 1411b can be reduced.

[0105] Only one discharge port 1411b can be formed in the valve plate 1411, or a plurality of discharge ports 1411b can be formed. As described above, the present embodiment shows an example in which the discharge ports 1411b are configured to be plural. Thus, the inner diameter of each discharge port 1411b can be made smaller, so that the rigidity of the opening / closing end portion 1413c of the discharge valve 1413 described later becomes smaller.

[0106] For example, the discharge ports 1411b of the present embodiment are respectively disposed on the left and right sides, and the discharge ports 1411b can be formed symmetrically with each other. Thus, the amount of refrigerant discharged through the discharge ports 1411b on both sides can be made the same, so as to stabilize the operation of the discharge valve 1413 described later.

[0107] In addition, a plurality of discharge ports 1411b can be accommodated together in one discharge guide groove 1411c. In other words, a plurality of discharge ports 1411b can be respectively formed on the left and right sides inside the discharge guide groove 1411c. Thus, the refrigerant in the compression chamber 1315a can be discharged to the discharge guide groove 1411c through the discharge ports 1411b on both sides, and then guided to the discharge pipe 116 via the discharge space 1415a of the discharge cover 1415.

[0108] The discharge guide groove 1411c can be formed to surround a plurality of discharge ports 1411b, and can be formed in a substantially quadrilateral shape so as to be able to accommodate the both-side opening / closing end portions 1413c of the discharge valve 1413 described later together. Thereby, the processability of the discharge guide groove 1411c can be improved.

[0109] Although not shown in the drawings, a plurality of discharge guide grooves 1411c may be provided to respectively accommodate a plurality of discharge ports 1411b. In this case, the diameters of the discharge ports 1411b may be formed to be different from each other.

[0110] The bottom surface of the discharge guide groove 1411c may be formed to be flat as a whole. In other words, most of the bottom surface of the discharge guide groove 1411c except for the valve seat surface (not labeled in the drawings) around the discharge port 1411b may be formed at the same height. Thereby, the volume of the discharge guide groove 1411c is ensured as much as possible, and thus the discharge resistance of the refrigerant discharged through the discharge port 1411b can be minimized.

[0111] In addition, a valve fixing groove 1411d may be formed on one side (the upper side in the drawing) of the discharge guide groove 1411c. For example, the valve fixing groove 1411d may extend long in the left-right direction corresponding to the fixing end portion 1413a of the discharge valve 1413 described later, and may be formed in a rectangular shape when projected onto a plane. Thereby, the fixing end portion 1413a of the discharge valve 1413 described later can be placed in the valve fixing groove 1411d, and is pressed by the valve fixing portion 1414a of the valve stopper 1414 described later and fixed to the valve plate 1411.

[0112] The depth of the valve fixing groove 1411d may be formed to be the same as the depth of the discharge guide groove 1411c, and depending on the situation, considering the height of the valve seat surface, it may also be formed to be less than the depth of the discharge guide groove 1411c. An example in which the depth of the valve fixing groove 1411d is formed to be the same as the depth of the discharge guide groove 1411c is shown in this embodiment.

[0113] In addition, stopper support grooves 1411e may be formed on the left and right side surfaces on both sides of the discharge guide groove 1411c. The stopper support grooves 1411e may be formed by the support convex portions 1414c of the valve stopper 1414 described later extending long in the first direction. Thereby, the valve fixing portion 1414a of the valve stopper 1414 described later can be inserted and fixed in the discharge guide groove 1411c, and the support convex portions 1414c of the valve stopper 1414 described later can be inserted and fixed in the stopper support grooves 1411e. Through this, in a state where the valve stopper 1414 presses the discharge valve 1413, it can be stably fixed to the valve plate 1411.

[0114] Refer to Figure 3 and Figure 4, the discharge valve 1413 of this embodiment includes a fixed end portion 1413a, a connecting portion 1413b, and an opening / closing end portion 1413c. The fixed end portion 1413a is the portion fixed to the valve plate 1411, the connecting portion 1413b is the portion extending from the fixed end portion 1413a, and the opening / closing end portion 1413c is the portion extending from the connecting portion 1413b and opening / closing the discharge port 1411b. In other words, the fixed end portion 1413a can be formed at one end of the discharge valve 1413, the opening / closing end portion 1413c can be formed at the other end of the discharge valve 1413, and the connecting portion 1413b can be formed between the two ends of the discharge valve 1413. However, for the sake of convenience of explanation, the connecting portion 1413b can also be defined as being included in the opening / closing end portion 1413c for explanation.

[0115] The fixed end portion 1413a can be inserted into the above-mentioned valve fixing groove 1411d and pressed by the valve fixing portion 1414a of the valve stopper 1414 to be described later, so as to be fixed to the valve plate 1411. Thus, the fixed end portion 1413a can be formed corresponding to the valve fixing groove 1411d.

[0116] In other words, the fixed end portion 1413a can be restricted in the length direction of the discharge valve 1413, that is, in the second direction orthogonal to the first direction, by the fixing protrusion 1411f provided between the inner side surface of the discharge guide groove 1411c and the inner side surface of the valve fixing groove 1411d in the state of being inserted into the valve fixing groove 1411d. Thus, the fixed end portion 1413a can be stably fixed inside the valve fixing groove 1411a.

[0117] The connecting portion 1413b can extend parallelly from both ends of the fixed end portion 1413a, and each connecting portion 1413b can be formed to be smaller than the width of the fixed end portion 1413a. Thus, the rigidity of the connecting portion 1413b is reduced, so that the discharge port can be quickly opened when the valve is opened.

[0118] In addition, although the connecting portions 1413b can be formed with the same width along the length direction (second direction) respectively, they can also be formed such that the width gradually increases toward the opening / closing end portion 1413c to be described later as in this embodiment. In this case, even if the width of each connecting portion 1413b is formed to be smaller than the width (diameter) of the opening / closing end portion 1413c, damage to the valve can be suppressed between the connecting portion 1413b and the opening / closing end portion 1413c.

[0119] The opening / closing end portion 1413c can be formed to be inserted into the inside of the discharge guide groove 1411c together with the connecting portion 1413b. For example, the opening / closing end portion 1413c can extend from the connecting portion 1413b toward the discharge port 1411b in the second direction, but expand as much as possible into a circular shape to be able to open and close the discharge port 1411b. Thus, the opening / closing end portion 1413c connected to the other end of the connecting portion 1413b can be formed in a cantilever beam shape that forms a free end in the discharge guide groove 1411c.

[0120] A plurality of opening / closing end portions 1413c can be provided to independently open and close their respective discharge ports 1411b. In other words, the opening / closing end portions 1413c can extend parallel to each other from their respective connecting portions 1413b in the second direction corresponding to their respective discharge ports 1411b. Thus, the plurality of opening / closing end portions 1413c can open and close their respective discharge ports 1411b simultaneously.

[0121] In addition, as described above, the plurality of opening / closing end portions 1413c can respectively form a cantilever beam shape together with their respective connecting portions 1413b. Thus, the plurality of opening / closing end portions 1413c rotate around a single fixed end portion 1413a. At this time, if the moment arm (or the opening / closing portion length), which is defined as the distance from the fulcrum to the force point of the opening / closing end portion 1413c, becomes longer, the torsional moment and torque of the opening / closing end portion 1413c increase, making the operation of the opening / closing end portion 1413c unstable and increasing the valve knocking sound. However, in the present embodiment, since the valve support portion of the valve stopper 1414 described later is formed at the other end, the moment arm (opening / closing portion length) during the opening and closing of the opening / closing end portion 1413c can be shortened. By this, the torsional moment and / or torque during the opening and closing of the opening / closing end portion 1413c are reduced, making the operation of the opening / closing end portion 1413c stable and reducing the valve knocking sound. This will be described again later with respect to the valve stopper 1414.

[0122] On the other hand, as described above, the plurality of opening / closing end portions 1413c extend parallel from a single fixed end portion 1413a together with the connecting portions 1413b, such that the side surfaces of the respective opening / closing end portions 1413c facing each other receive relatively stronger stress from the fixed end portion 1413a compared to the opposite side surfaces (i.e., the outer side surfaces on the outer side with respect to the second direction). Thus, when the two side opening / closing end portions 1413c are opened, the side surface side facing each other, that is, the inner side surface side of the opening / closing end portion 1413c, is delayed compared to the outer side surface side as the opposite side, and a kind of inclination phenomenon in which the opening / closing end portion 1413c is distorted may occur.

[0123] However, in the present embodiment, since the inclination suppressing portion 1414d is formed in the valve stopper 1414 described later, the inclination phenomenon occurring during the opening and closing of the opening / closing end portion 1413c can be reduced. This will be described again later with respect to the valve stopper 1414.

[0124] Reference Figures 4 to 7 Figures 4 to 7 , the valve stopper 1414 of this embodiment may include a valve fixing part 1414a and a valve support part 1414b. The valve stopper 1414 as a whole may be formed in a shape similar to that of the discharge valve 1413.

[0125] For example, in the valve stopper 1414, a plurality of valve support parts 1414b may extend from the valve fixing part 1414a in directions crossing the length direction of the valve fixing part 1414a. In other words, the valve fixing part 1414a may extend in the first direction and be formed in a rectangular shape, and the valve support parts 1414b may extend parallel to each other from both ends of the valve fixing part 1414a.

[0126] The valve fixing part 1414a may be formed in a shape and / or size that is almost similar to or the same as the fixing end part 1413a of the discharge valve 1413. In other words, the valve fixing part 1414a may be formed in a rectangular shape in the first direction in the same way as the fixing end part 1413a. Thus, the valve fixing part 1414a may be inserted into the valve fixing groove 1411d and fixed to the valve plate 1411 together with the fixing end part 1413a of the discharge valve 1413.

[0127] A plurality of valve support parts 1414b may be symmetrically formed with respect to each other in the same way as their respective connection parts 1413b and opening / closing end parts 1413c. Thus, the following description will be centered on one side valve support part 1414b, and the description of the other side valve support part 1414b will be omitted.

[0128] Reference Figure 6 And Figure 7 Figure 7 , the valve support part 1414b may be formed in multiple stages. In other words, the surface of the valve support part 1414b facing the discharge valve 1413 may be formed in multiple stages. Although the surface of the valve support part 1414b facing the discharge valve 1413 may be called the valve support surface, for the sake of convenience in the following description, the valve support surface will be collectively referred to as the valve support part 1414b for description.

[0129] Specifically, the valve support portion 1414b of this embodiment may be composed of a first-order valve support portion 1414b1 and a second-order valve support portion 1414b2. The first-order valve support portion 1414b1 may be continuously formed with the valve fixing portion 1414a, and the second-order valve support portion 1414b2 may be continuously formed with the first-order valve support portion 1414b1. Thus, the valve support portion 1414b may be formed in the order of the valve fixing portion 1414a - the first-order valve support portion 1414b1 - the second-order valve support portion 1414b2. A first support point P1 may be formed between the valve fixing portion 1414a and the first-order valve support portion 1414b1, and a second support point P2 may be formed between the first-order valve support portion 1414b1 and the second-order valve support portion 1414b2. Although the first support point P1 and the second support point P2 are linear (or narrow surfaces) in the width direction of the valve support portion 1414b when axially projected, the following will be described in terms of points based on the view from the front.

[0130] For example, the first-order valve support portion 1414b1 may be formed flat. For example, the first-order valve support portion 1414b1 may be formed as a step having a first height H1 relative to the valve fixing portion 1414a, but may be formed parallel to the valve fixing portion 1414a. Thus, when the discharge valve 1413 opens and closes a part (e.g., the neck) of the opening and closing end portion 1413c, while rotating about the first support point P1, the opening amount is restricted by the first-order valve support portion 1414b1.

[0131] In addition, the length (second length) L2 of the first-order valve support portion 1414b1 may be formed to be greater than or equal to the length (first length) L1 of the valve fixing portion 1414a. For example, the length L2 of the first-order valve support portion 1414b1 may be formed to be greater than the length L1 of the valve fixing portion 1414a. Thus, an excessive increase in the rigidity of the discharge valve 1413 can be suppressed.

[0132] The second-order valve support portion 1414b2 of this embodiment may be formed to have a curved surface. For example, the second-order valve support portion 1414b2 may be formed as a step having a second height H2 from the first-order valve support portion 1414b1, but may be formed as a curved surface to have a preset curvature with respect to the first-order valve support portion 1414a. In other words, the first-order valve support portion 1414b1 may be formed as a straight surface, and the second-order valve support portion 1414b2 may be formed as a curved surface where the second height H2 gradually increases as it is farther away from the end of the first-order valve support portion 1414b1. Thus, when the discharge valve 1413 opens and closes another part (e.g., the opening and closing portion) of the opening and closing end portion 1413c, while rotating about the second support point P2, the opening amount is restricted by the second-order valve support portion 1414b2.

[0133] In addition, the length (third length) L3 of the second-order valve support portion 1414b2 may be formed to be greater than or equal to the length L1 of the valve fixing portion 1414a. For example, the length L3 of the second-order valve support portion 1414b2 may be formed to be greater than the length L1 of the valve fixing portion 1414a. Thereby, an excessive increase in the rigidity of the discharge valve 1413 can be suppressed.

[0134] In addition, the height of the second-order valve support portion 1414b2, that is, the height (hereinafter, second height) H2 between the first-order valve support portion 1414b1 and the second-order valve support portion 1414b2 may be formed to be greater than or equal to the first height H1. For example, the second height H2 may be formed to be greater than approximately twice the first height H1 or more. Thereby, at the initial stage of the opening of the discharge valve 1413, the torsional moment of the discharge valve 1413 can be quickly offset, the operation of the discharge valve 1413 can be stabilized, and at the same time, the discharge resistance of the refrigerant discharged through the discharge port 1411b can be minimized.

[0135] A support convex portion 1414c radially extending from the second-order valve support portion 1414b2 may be formed on the outer periphery of the second-order valve support portion 1414b2. The support convex portion 1414c may extend in the first direction corresponding to the stopper support groove 1411e of the valve plate 1411 described above. The tilt suppression portion 1414d described later may radially extend between the support convex portion 1414c and the second-order valve support portion 1414b2. Thereby, the support convex portion 1414c can not only easily form the tilt suppression portion 1414d, but also the support convex portion 1414c can ensure the strength of the tilt suppression portion 1414d.

[0136] On the other hand, a tilt suppression portion 1414d may be formed on the outer periphery of the second-order valve support portion 1414b2 to support the opening / closing end portion 1413c of the discharge valve 1413. The tilt suppression portion 1414d may extend in a direction away from the second-order valve support portion 1414b2 on the opposite side. Thereby, in the case where the plurality of opening / closing end portions 1413c of the discharge valve 1413 extend in parallel from one fixed end portion 1413a, the operation instability of the opening / closing operation caused by the stress difference differently applied to the both side surfaces of the opening / closing end portion 1413c when the discharge valve 1413 opens and closes can be offset.

[0137] For example, as Figure 6As shown, the tilt suppression portion 1414d extends radially from the outer peripheral surface of the valve support portion 1414b, and is formed on the opposite side of the valve fixing portion 1414a with respect to the virtual line (hereinafter, the first direction virtual line) CL1 that connects the centers of the two side valve support portions 1414b to each other in the first direction. In other words, the tilt suppression portion 1414b can extend radially from the peripheral surfaces of the two side second-order valve support portions 1414b2, and can be formed in a region that is away from the valve fixing portion 1414a and away from the two side second-order valve support portions 1414b2 in the region divided by the intersection of the first direction virtual line CL1 and the second direction virtual line CL2 orthogonal to the first direction virtual line CL1. Thus, the tilt suppression portion 1414d can support the action of twisting and expanding outward when the opening and closing end portion 1413c of the discharge valve 1413 is opened. By this, when the above-described symmetric discharge valve 1413 opens and closes, the opening and closing end portion 1413c can be suppressed from being twisted and deformed, and thus the operation can be stabilized.

[0138] The discharge system of the valve assembly of the present embodiment as described above can operate as follows.

[0139] Referring to Figures 8 to 10 , if the piston 132 constituting the compressor main body C retreats (suction stroke), the volume of the compression chamber 1315a increases, and the pressure in the compression chamber 1315a is lower than the pressure in the discharge chamber 1415a. Thus, the two side valve opening and closing portions 1413c of the discharge valve 1413 and their respective connection portions 1413b rotate about the valve fixing portion 1413a in the closing direction to close their respective discharge ports 1411b.

[0140] Then, if the piston 132 pushed toward the rear side advances (discharge stroke), the volume of the compression chamber 1315a decreases, and the pressure in the compression chamber 1315a is greater than the sum of the pressure in the discharge chamber 1415a and the elastic force of the discharge valve 1413. Thus, the two side opening and closing end portions 1413c of the discharge valve 1413 and their respective connection portions 1413b fold and open their respective discharge ports 1411b about the fixed end portion 1413a. At this time, the respective opening and closing end portions 1413c of the discharge valve 1413 and their respective connection portions 1413b are secondarily opened by the respective valve support portions 1414b of the valve stopper 1414, and not only can the operation of the valve be stabilized, but also the valve knocking sound can be reduced.

[0141] Figures 11a to 11c is a schematic diagram shown for explaining the opening operation of the discharge valve. These drawings illustrate a representative example of one side connection portion and the opening and closing end portion, but for the sake of convenience of explanation, the operation of the discharge valve is shown slightly exaggerated.

[0142] Referring to Figure 11a, at the initial stage of the opening of the discharge valve 1413, the opening / closing end portion 1413c rotates about the fixed end portion 1413a together with the connecting portion 1413b. At this time, the fixed end portion 1413a contacts the first-order support point P1 between the connecting portion 1413b and the valve fixing portion 1414a provided on the valve stopper 1414 and the first-order valve support portion 1414b1, and the connecting portion 1413b and the opening / closing end portion 1413c of the discharge valve 1413 accumulate elastic force and open. In other words, at the initial stage of the opening of the discharge valve 1413, the connecting portion and the opening / closing end portion can be in a free state between the valve plate and the valve stopper to allow the opening action.

[0143] Then, referring to Figure 11b , at the middle stage of the opening of the discharge valve, the connecting portion 1413b of the discharge valve 1413 contacts the second-order support point P2 between the first-order valve support portion 1414b1 and the second-order valve support portion 1414b2, thereby restricting the opening action of the connecting portion 1413b. Thus, the connecting portion 1413b of the discharge valve 1413 bulges and bends centering on the first-order support point P1 toward the first-order valve support portion 1414b1.

[0144] On the contrary, the opening / closing end portion 1413c does not reach the second-order valve support portion 1414b2 and continues the opening action. Thus, the end of the opening / closing end portion 1413c of the discharge valve 1413 becomes a free end, and the opening / closing end portion 1413c of the discharge valve 1413 bends toward the second valve support portion 1414b2.

[0145] Then, referring to Figure 11c , at the late stage of the opening of the discharge valve, the opening / closing end portion 1413c of the discharge valve 1413 contacts the second-order valve support portion 1414b2, thereby completely restricting the opening action of the discharge valve 1413. Thus, while the connecting portion 1413b of the discharge valve 1413 is in close contact with the first-order valve support portion 1414b1, the opening / closing end portion 1413c is in close contact with the second-order valve support portion 1414b2.

[0146] Then, if the piston 132 retracts again to make the pressure in the compression chamber 1315a lower than the pressure in the discharge chamber 1415a, the discharge valve 1413, under the action of the elastic force of the connecting portion 1413b, gradually opens the connecting portion 1413b and the opening / closing end portion 1413c, and contacts the valve plate 1411 to close the discharge port 1411b.

[0147] Thus, since the length of the moment arm of the discharge valve is shortened, the torsional moment and / or torque generated in the connecting portion and the opening / closing end portion during the opening and closing of the discharge valve can be offset. By this, not only can the action instability of the opening / closing end portion that may occur during the opening and closing of the discharge valve be suppressed to improve the compression efficiency, but also the valve knocking sound can be reduced to improve the compressor noise.

[0148] On the other hand, the situation of another embodiment of the valve stopper is as follows.

[0149] That is, in the above embodiment, one side surface of the valve stopper facing the discharge valve is formed flat, but depending on the situation, one side surface of the valve stopper facing the discharge valve may also be formed in multiple stages or inclined or formed into a curved surface.

[0150] Figure 12 It is a cross-sectional view showing another embodiment of the valve stopper.

[0151] Refer to Figure 12 , the discharge system of the valve assembly of this embodiment may include a valve plate 1411, a discharge valve 1413, and a valve stopper 1414. The basic configurations and their functions and effects of these valve plate 1411, discharge valve 1413, and valve stopper 1414 are the same as those of the above embodiment, so the specific description thereof is omitted. For example, the valve support portion 1414b of the valve stopper 1414 of this embodiment may be composed of a first-order valve support portion 1414b1 and a second-order valve support portion 1414b2. A first support point P1 may be formed between the valve fixing portion 1414a and the first-order valve support portion 1414b1, and a second support point P2 may be formed between the first-order valve support portion 1414b1 and the second-order valve support portion 1414b2. This is the same as the above embodiment.

[0152] However, differently from the above embodiment, the valve support portion (precisely, the valve support) 1414b of the valve stopper 1414 of this embodiment may not be formed flat. For example, the first-order valve support portion 1414b1 may also be formed in multiple stages in such a way that it is farther away from the valve plate (the bottom surface of the discharge guide groove) (1411) as it gets closer to the second-order valve support portion 1414b2 from the valve fixing portion 1414a, or may be inclined at a preset inclination angle α, or may be formed into a curved surface. In this case, when the connection portion 1413b of the discharge valve 1413 is opened, it rotates and bends around the first support point P1, so that the opening amount is restricted by the first-order valve support portion 1414b1.

[0153] As described above, when the first-order valve support portion 1414b1 is formed in multiple stages or inclined or formed into a curved surface, the interval between the valve plate 1411 and the valve stopper 1414 at the second support point P2 expands. As a result, the flow path resistance decreases when the discharge valve 1413 is opened. Thus, similar to the above embodiment, it is possible to stably operate the discharge valve 1413, reduce the collision noise, and quickly discharge the refrigerant in the compression chamber.

[0154] Although not illustrated in the drawings, the second-order valve support portion 1414b2 forms a straight surface, but the second height H2 may also be formed more inclined than the first height H1. In this case, the opening / closing end portion 1413c of the discharge valve 1413 can rotate around the second-order support point P2 when opened, and the opening amount is restricted by the second-order valve support portion 1414b2. However, in this case, since a buffer space is formed between the opening / closing end portion 1413c and the second-order valve support portion 1414b2, the collision force against the opening / closing end portion 1413c can be reduced during the contact process between the opening / closing end portion 1413c and the second-order valve support portion 1414b2.

[0155] On the other hand, the situation of another embodiment of the valve stopper is as follows.

[0156] That is, in the above-described embodiment, one side surface of the valve stopper facing the discharge valve is formed flat, but depending on the situation, a valve buffer portion may also be formed on one side surface of the valve stopper facing the discharge valve.

[0157] Figure 13 It is a perspective view of another embodiment of the valve stopper.

[0158] Refer to Figure 13 , the discharge system of the valve assembly of this embodiment may include a valve plate 1411, a discharge valve 1413, and a valve stopper 1414. The basic configurations and their functions and effects of these valve plate 1411, discharge valve 1413, and valve stopper 1414 are the same as those of the above-described embodiment, so the detailed description thereof is omitted. For example, the valve support portion 1414b of the valve stopper 1414 of this embodiment may be composed of a first-order valve support portion 1414b1 and a second-order valve support portion 1414b2. A first-order support point P1 may be formed between the valve fixing portion 1414a and the first-order valve support portion 1414b1, and a second-order support point P2 may be formed between the first-order valve support portion 1414b1 and the second-order valve support portion 1414b2. This is the same as the above-described embodiment.

[0159] However, different from the above-described embodiment, at least one or more valve buffer portions 1414e may be formed on the valve support portion (more precisely, the valve support surface) 1414b of the valve stopper 1414 of this embodiment. For example, the valve buffer portion 1414e may be recessed at a preset depth in the first-order valve support portion 1414b1 facing the connection portion 1413b of the discharge valve 1413.

[0160] As Figure 13 shown, the valve buffer portion 1414e may be recessed in the center of the first-order valve support portion 1414b1 to have a peripheral surface, but depending on the situation, it may also be longitudinally penetrated in the width direction in the center of the first-order valve support portion 1414b1 to open a part of the peripheral surface.

[0161] As described above, in the case where the valve buffer portion 1414e is recessed in the first - order valve support portion 1414b1, a preset amount of refrigerant and / or oil can be stored in the valve buffer portion 1414e under the action of the discharge pressure. In this way, when the discharge valve 1413 is opened, it is possible to offset the torsional deformation when the discharge valve 1413 is opened and at the same time buffer the collision force between the back surface of the discharge valve 1413 and the valve stopper 1414 facing it. By this, it is possible to further stabilize the opening and closing operation of the discharge valve 1413 and at the same time further reduce the collision noise generated during opening and closing.

[0162] Although not shown in the drawings, the valve buffer portion 1414e may also be formed to penetrate the valve stopper 1414 in the thickness direction. In this case, the valve buffer portion 1414e may be formed with the same inner diameter, but depending on the situation, it may also be formed in a tapered cross - sectional shape with a smaller inner diameter as it is farther from the discharge valve 1413. In this case, the refrigerant and / or oil in the discharge chamber 1415a flows into the back side of the discharge valve 1413 through the valve buffer portion 1414e, thereby being able to buffer the opening and closing operation of the discharge valve 1413.

[0163] In addition, although not shown in the drawings, the valve buffer portion 1414e may also be formed in the second - order valve support portion 1414b2 other than the first - order valve support portion 1414b1. In this case, the structure or effect of the valve buffer portion 1414e is the same as that of the above - mentioned embodiment, so the specific description thereof is omitted.

[0164] On the other hand, in the above - mentioned embodiment, the description is centered on the valve assembly applicable to a reciprocating compressor, but it is not necessarily limited to the valve assembly of a reciprocating compressor. Since this embodiment relates to a reed valve, it can be similarly applied to a valve assembly composed of the reed valve and a compressor having the valve assembly.

Claims

1. A compressor, wherein, Comprising: A cylinder barrel having a compression chamber for sucking and compressing a refrigerant; A valve plate coupled to the cylinder barrel and having a discharge port communicating with the compression chamber; A discharge valve provided on one side of the valve plate opposite to the cylinder barrel to open and close the discharge port; A discharge cover provided on one side of the discharge valve opposite to the valve plate, coupled to the cylinder barrel, and accommodating the discharge port; And A valve stopper provided between the discharge valve and the discharge cover to support the discharge valve on the valve plate; In the valve stopper, At least two or more support points are formed, and the support points support the opening direction of the discharge valve.

2. The compressor according to claim 1, wherein The valve stopper includes: A valve fixing portion provided at one end of the valve stopper and in close contact with the discharge valve; and A valve support portion extending from the valve fixing portion, and the discharge valve fits or separates from the valve support portion; At least one or more of the support points are formed between both ends in the length direction of the valve support portion.

3. The compressor according to claim 2, wherein In the valve stopper, A first-order support point is formed between the valve fixing portion and the valve support portion, and a second-order support point is formed in the middle of the length direction of the valve support portion.

4. The compressor according to claim 3, wherein In the valve support portion, A second length from the first-order support point to the second-order support point is greater than or equal to a first length of the valve fixing portion.

5. The compressor according to claim 3, wherein In the valve support portion, A second length from the first-order support point to the second-order support point is greater than or equal to a third length from the second-order support point to the end of the valve support portion.

6. The compressor according to claim 3, wherein In the valve support portion, A second length from the first-order support point to the second-order support point is greater than or equal to a first length of the valve fixing portion, A second length from the first-order support point to the second-order support point is greater than or equal to a third length from the second-order support point to the end of the valve support portion, The second length is less than or equal to the third length.

7. The compressor according to claim 2, wherein A first height between the valve fixing portion and the valve support portion is less than or equal to a second height between both ends of the valve support portion.

8. The compressor according to claim 3, wherein A valve buffer portion is formed on a valve support surface of the valve support portion facing the discharge valve.

9. The compressor according to claim 8, wherein The valve support portion includes: A first-order valve support portion extending from the valve fixing portion; and A second-order valve support portion extending from the first-order valve support portion, and a support point is provided between the second-order valve support portion and the first-order valve support portion; The valve buffer portion is formed in the first-order valve support portion.

10. The compressor according to claim 9, wherein The valve buffer portion is formed by being recessed from the valve support surface or formed by penetrating the valve support surface.

11. The compressor according to claim 9, wherein The valve buffer portion is formed obliquely on the valve support surface.

12. The compressor according to any one of claims 1 to 11, wherein a plurality of discharge ports are provided, the discharge valve is composed of a single fixed end portion and a plurality of opening / closing end portions extending from the single fixed end portion, the valve stopper is composed of a single valve fixing portion and a plurality of valve support portions extending from the single fixed end portion, radially extending tilt suppressing portions are respectively formed in the plurality of valve support portions.

13. The compressor according to claim 12, wherein the plurality of valve support portions respectively extend from both sides in the longitudinal direction of the single valve fixing portion in a direction intersecting the longitudinal direction of the valve fixing portion, the tilt suppressing portion extends from the opposite side of the surface where the plurality of valve support portions face each other.

14. The compressor according to claim 13, wherein the tilt suppressing portion is formed on the opposite side of the valve fixing portion with reference to a virtual line connecting the centers of the plurality of valve support portions.

15. The compressor according to claim 12, wherein radially extending support protrusions are respectively formed in the plurality of valve support portions, the tilt suppressing portion extends radially between the support protrusion and the valve support portion.

Images