Reciprocating compressor

Abstract

Disclosed is a reciprocating compressor. In the reciprocating compressor, a suction muffler may comprise a plurality of suction passages, and the plurality of suction passages may be formed to communicate with different noise chambers. Consequently, as a portion of a suctioned refrigerant is rapidly suctioned into a compression chamber via the suction passages having low flow resistance, the suction speed of the refrigerant increases, while at the same time overheating of the suctioned refrigerant inside the suction muffler is suppressed. Accordingly, compressor performance may be enhanced as the total refrigerant suction volume is increased.

Description

Reciprocating compressor

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

[0002] A reciprocating compressor draws in, compresses, and discharges refrigerant as a piston reciprocates within a cylinder. Reciprocating compressors can be classified into connected reciprocating compressors and vibrating reciprocating compressors depending on the piston's driving method.

[0003] A connected-type reciprocating compressor is a method in which a piston connected to a rotary motor via a crankshaft and a connecting rod reciprocates within a cylinder, and a vibrating-type reciprocating compressor is a method in which a piston connected to the actuator of a reciprocating motor reciprocates within a cylinder. The present invention relates to a connected-type reciprocating compressor, and hereinafter, a reciprocating compressor may be understood as a connected-type reciprocating compressor.

[0004] A suction muffler may be provided on the suction side of a reciprocating compressor to dampen flow noise and / or pressure pulsations generated when refrigerant is sucked in. Then, as the refrigerant flows into the interior of the shell through a suction pipe connected to the shell and passes through the suction muffler, vibration and noise can be reduced.

[0005] Intake mufflers can be broadly classified into direct intake and indirect intake types depending on how they are connected to the intake pipe. The direct intake method involves a direct connection between the intake pipe and the intake muffler, while the indirect intake method involves a separation between the two. In the direct intake method, since the refrigerant is drawn directly into the intake muffler without passing through the internal space of the shell, it suppresses the heating of the intake refrigerant, thereby reducing intake losses; however, this may increase pressure pulsations caused by vibrations of the intake refrigerant. The indirect intake method lowers pressure pulsations by damping the vibrations of the intake refrigerant, but intake losses may occur as the refrigerant heats up inside the shell.

[0006] In addition to direct and indirect intake methods, intake mufflers may also include a proximity intake method. The proximity intake method is a system in which the intake pipe is inserted into and connected to the intake muffler, but with a small gap between the pipe and the muffler. The proximity intake method can attenuate the pulsating pressure generated in the direct intake method while suppressing the heating of the intake refrigerant that occurs in the indirect intake method. This proximity intake method can be understood as a type of direct intake method in that the intake pipe is inserted into the interior of the intake muffler.

[0007] The conventional intake muffler described above reduces vibration and / or noise of the intake refrigerant drawn into the cylinder through the intake muffler by forming the interior of the intake muffler, through which the intake refrigerant passes, into a complex flow path and / or space.

[0008] However, as previously explained, conventional intake mufflers are formed with complex internal passages and / or spaces, which can lead to excessively increased flow resistance and a reduction in the flow rate of the intake refrigerant. Furthermore, as the intake refrigerant stagnates within the intake muffler, it may heat up due to the internal heat of the shell, causing its temperature or density to rise. Consequently, intake losses caused by the intake muffler may occur, potentially degrading the performance of the compressor.

[0009] The objective of the present invention is to provide a reciprocating compressor capable of increasing the amount of refrigerant sucked into the compression chamber per unit time through the suction muffler.

[0010] Another objective of the present invention is to provide a reciprocating compressor capable of increasing the amount of refrigerant drawn into the compression chamber per unit time by reducing flow resistance in the intake muffler.

[0011] Another objective of the present invention is to provide a reciprocating compressor that can increase the amount of refrigerant sucked into the compression chamber per unit time by suppressing the superheating of the refrigerant passing through the suction muffler.

[0012] Another objective of the present invention is to provide a reciprocating compressor capable of increasing the amount of refrigerant drawn into the compression chamber per unit time while reducing pressure pulsation of the refrigerant passing through the suction muffler.

[0013] Another objective of the present invention is to provide a reciprocating compressor capable of increasing the amount of refrigerant drawn into the compression chamber per unit time while also increasing the noise attenuation effect of passing through the suction muffler.

[0014] Another objective of the present invention is to provide a reciprocating compressor that can increase the refrigerant intake volume while simplifying the appearance of the intake muffler to lower manufacturing costs for the intake muffler, and at the same time, form the intake muffler as large as possible or miniaturize the compressor.

[0015] Another objective of the present invention is to provide a reciprocating compressor capable of increasing the refrigerant intake amount by rapidly guiding the refrigerant sucked into the internal space of the shell into the interior of the intake muffler while lowering the flow resistance inside the intake muffler.

[0016] To achieve the objective of the present invention, a reciprocating compressor comprising a shell, a cylinder, a piston, a suction pipe, and a suction muffler may be provided. The cylinder may be provided within the internal space of the shell. The piston may be provided to reciprocate within the cylinder to form a compression section. The suction pipe may be connected by penetrating the shell. The suction muffler may have a muffler inlet opening toward the suction pipe, a muffler outlet spaced apart from the muffler inlet and opening toward the cylinder, at least one noise space provided between the muffler inlet and the muffler outlet, and a suction passage that guides the refrigerant flowing in through the muffler inlet toward the muffler outlet. The suction passage may be composed of a plurality of suction passages, and the plurality of suction passages may be formed to have different flow resistances. Through this, a portion of the suction refrigerant is rapidly sucked into the compression chamber through a suction passage with low flow resistance, thereby increasing the suction speed of the refrigerant, while simultaneously suppressing the superheating of the suction refrigerant inside the suction muffler, so that the total amount of refrigerant sucked is increased and the compressor performance can be improved.

[0017] For example, the respective outlets of the plurality of suction passages may be connected to different noise spaces.

[0018] As another example, the plurality of suction passages may be formed such that at least some of them have different cross-sectional areas.

[0019] For example, the above plurality of suction passages may be formed with different inlet cross-sectional areas based on the refrigerant suction path.

[0020] Specifically, among the plurality of suction passages, the inlet cross-sectional area of ​​the suction passage communicating with the downstream noise space based on the refrigerant suction path may be formed to be smaller than the inlet cross-sectional area of ​​the suction passage communicating with the upstream noise space.

[0021] As another example, the intake muffler may include a muffler body portion having at least one noise space; and a muffler fixing portion extending from one side of the muffler body portion and fixed to the compression portion. The muffler inlet may be formed by penetrating the muffler body portion.

[0022] For example, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The inlet of the first suction passage and the inlet of the second suction passage may be connected to the same noise space.

[0023] Specifically, the inlet of the second suction passage may be formed to be located upstream of the inlet of the first suction passage with respect to the refrigerant suction path.

[0024] Additionally, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The first suction passage and the second suction passage may be formed inside the suction muffler. Through this,

[0025] For example, a passage-forming portion protruding toward the noise space may be formed on the inner surface of the intake muffler. The plurality of intake passages may be formed by penetrating the interior of the passage-forming portion.

[0026] In addition, at least one of the plurality of intake passages may be formed on the outside of the intake muffler.

[0027] For example, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The second suction passage may be formed on the outer surface of the suction muffler.

[0028] Specifically, a connecting passage is formed on the outer surface of the intake muffler, with both ends recessed toward the noise space by a predetermined depth, and an inlet and an outlet may be formed on both sides of the connecting passage. The second intake passage may be formed by a connecting member inserted into the connecting passage to cover the space between the inlet and the outlet, or by a connecting member connecting both ends to the inlet and the outlet, respectively.

[0029] Additionally, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The second suction passage may be formed by penetrating the interior of a connecting member spaced apart from the outer surface of the muffler body.

[0030] Specifically, the inlet portion to which one end of the connecting member is connected and the outlet portion to which the other end of the connecting member is connected can each penetrate the muffler body portion and communicate with different noise spaces.

[0031] Specifically, the inlet portion to which one end of the connecting member is connected can penetrate the muffler body portion and communicate with the noise space. The outlet portion to which the other end of the connecting member is connected can penetrate the muffler fixing portion and communicate with the muffler outlet.

[0032] In addition, an intake guide is coupled to the muffler inlet, and the intake guide may be formed with a plurality of guide passages separated from each other so as to communicate with the plurality of intake passages.

[0033] For example, the plurality of guide passages may include a first guide passage; and a second guide passage provided on one side of the first guide passage. The first guide passage and the second guide passage may be connected to the plurality of suction passages in the same noise space.

[0034] Specifically, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The second guide passage may be formed adjacent to the second suction passage than to the first suction passage.

[0035] Specifically, the plurality of guide passages includes a first guide passage; and a second guide passage provided on one side of the first guide passage, and the first guide passage and the second guide passage may each be independently connected to the plurality of suction passages.

[0036] For example, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The first guide passage is connected to the first suction passage with at least one noise space in between, and the second guide passage may be directly connected to the second suction passage.

[0037] In another embodiment, the intake muffler may include a muffler body portion, a muffler fixing portion, and a muffler extension portion. The muffler body portion may be provided with at least one noise space. It may be extended from the muffler body portion and fixed to the compression portion. The muffler extension portion extends from the outer surface of the muffler body portion, and the muffler inlet may be formed on one side. The plurality of intake passages may penetrate the interior of the muffler extension portion and communicate with the muffler inlet.

[0038] For example, the muffler extension may be formed such that at least a portion of each of the multiple covers forming the muffler body extends from each other and interlocks with one another. The multiple intake passages may be formed separately from each other in the muffler extension.

[0039] Specifically, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. The second suction passage may be formed between two extension portions extending from each of the plurality of covers.

[0040] More specifically, the second suction passage may be formed with different cross-sectional shapes along the suction path of the refrigerant.

[0041] In addition, at least a portion of the cross-sectional area of ​​the second suction passage may be formed to be larger than the cross-sectional area of ​​the first suction passage.

[0042] In addition, the muffler extension may be formed by separating it into multiple parts, and the multiple intake passages may be formed by penetrating the interior of each of the multiple muffler extensions one by one.

[0043] Specifically, at least one of the plurality of muffler extension parts may be formed by extending as a single unit from one of the plurality of covers forming the muffler body part.

[0044] Specifically, at least one of the plurality of muffler extension parts may be formed by post-assembling it to one of the plurality of covers forming the muffler body part.

[0045] Additionally, the plurality of suction passages may include a first suction passage; and a second suction passage provided on one side of the first suction passage, the second suction passage having an outlet connected to a noise space located downstream of the noise space connected to the outlet of the first suction passage. An intermediate opening penetrating between the interior and exterior of the first suction passage may be formed between the inlet and the outlet of the first suction passage. The intermediate opening may be connected to a noise space located upstream of the noise space connected to the outlet of the second suction passage, with respect to the refrigerant suction path.

[0046] For example, the first suction passage may include an inlet-side passage portion that opens toward the muffler inlet; and an outlet-side passage portion that opens toward the muffler outlet. The intermediate opening may be formed such that at least a portion between the inlet-side passage portion and the outlet-side passage portion is spaced apart.

[0047] In another embodiment, the suction pipe may be connected to the internal space of the shell. The muffler inlet may be spaced apart from the suction pipe and connected to the internal space of the shell.

[0048] As another example, the suction pipe may penetrate the shell and be inserted into the muffler inlet. Among the plurality of suction passages, at least one suction passage may be formed in alignment with the outlet of the suction pipe or formed downstream of the outlet of the suction pipe with respect to the refrigerant suction path.

[0049] The reciprocating compressor of the present invention may have a suction muffler that includes a plurality of suction passages, wherein the plurality of suction passages may be formed to communicate with different noise spaces. Through this, a portion of the suction refrigerant is rapidly sucked into the compression chamber through a suction passage with low flow resistance, thereby improving the suction speed of the refrigerant, while simultaneously suppressing the superheating of the suction refrigerant inside the suction muffler, so that the total amount of refrigerant sucked is improved and the compressor performance can be improved.

[0050] The reciprocating compressor of the present invention may be configured such that the suction muffler includes a plurality of suction passages, wherein some of the suction passages allow the suction refrigerant to pass through a small number of noise spaces, while other suction passages allow the suction refrigerant to pass through a plurality of noise spaces sequentially. Through this, the amount of refrigerant sucked into the compression chamber can be increased, while effectively attenuating pressure pulsation and / or suction noise of the refrigerant passing through the suction muffler.

[0051] The reciprocating compressor of the present invention may be formed such that the suction muffler includes a plurality of suction passages, wherein each of the plurality of suction passages is formed within the interior of the muffler body portion constituting the suction muffler. Through this, the suction amount of refrigerant can be increased while the appearance of the suction muffler is simplified, thereby lowering the manufacturing cost of the suction muffler. At the same time, interference between the suction muffler and other components is reduced, allowing the suction muffler to be formed as large as possible or the compressor to be miniaturized.

[0052] The reciprocating compressor of the present invention may have a suction muffler that includes a plurality of suction passages, wherein the plurality of suction passages may be formed to extend long toward the suction pipe. Through this, the flow resistance inside the suction muffler is lowered, and the refrigerant sucked into the internal space of the shell is guided into the interior of the suction muffler before it is superheated, thereby further increasing the refrigerant suction amount.

[0053] FIG. 1 is a perspective view showing the interior of a reciprocating compressor according to the present embodiment through the shell.

[0054] FIG. 2 is a cross-sectional view showing the interior of a reciprocating compressor according to FIG. 1.

[0055] FIG. 3 is a perspective view showing an assembled intake muffler according to the present embodiment.

[0056] FIG. 4 is a perspective view showing the intake muffler in FIG. 3 disassembled.

[0057] FIG. 5 is a perspective view showing the main intake passage by breaking the intake muffler according to the present embodiment.

[0058] Fig. 6 is a front view of Fig. 5.

[0059] FIG. 7 is a perspective view showing a sub-intake passage by breaking the intake muffler according to the present embodiment.

[0060] Fig. 8 is a front view of Fig. 7.

[0061] FIG. 9 is a cross-sectional view along line "IX-IX" of FIG. 8.

[0062] FIG. 10 is an exploded perspective view showing another embodiment of the suction passage.

[0063] FIG. 11 is a cross-sectional view shown in FIG. 10 to illustrate the suction passage.

[0064] FIG. 12 is an exploded perspective view showing another embodiment of the suction passage.

[0065] FIG. 13 is a cross-sectional view shown in FIG. 12 to illustrate the suction passage.

[0066] FIG. 14 is a cross-sectional view shown to illustrate another embodiment of the suction passage.

[0067] FIG. 15 is a cross-sectional view shown to illustrate another embodiment of the suction passage.

[0068] FIG. 16 is an exploded perspective view showing another embodiment of a muffler inlet.

[0069] FIG. 17 is a cross-sectional view showing the assembled muffler inlet of FIG. 16.

[0070] FIG. 18 is a cross-sectional view showing another embodiment of a muffler inlet assembled.

[0071] FIG. 19 is a perspective view showing another embodiment of an intake muffler.

[0072] FIG. 20 is a perspective view showing the intake muffler of FIG. 19 disassembled.

[0073] FIG. 21 is a cross-sectional view of the intake muffler of FIG. 20 assembled.

[0074] FIG. 22 is a perspective view showing another embodiment of an intake muffler.

[0075] FIG. 23 is a cross-sectional view showing the intake muffler of FIG. 22 assembled.

[0076] FIG. 24 is a cross-sectional view showing another embodiment of the intake passage in the intake muffler of FIG. 23.

[0077] Hereinafter, a reciprocating compressor according to the present invention will be described in detail based on an embodiment illustrated in the attached drawings. In this specification, identical or similar reference numbers are assigned to identical or similar components even in different embodiments, and the description thereof is replaced by the first description.

[0078] Singular expressions used in this specification may include plural expressions unless the context clearly indicates otherwise. Additionally, in describing the embodiments disclosed in this specification, detailed descriptions of related prior art are omitted if it is determined that such detailed descriptions could obscure the essence of the embodiments disclosed in this specification.

[0079] In addition, it should be noted that the attached drawings are intended only to facilitate understanding of the embodiments disclosed in this specification, and should not be interpreted as limiting the technical ideas disclosed in this specification by the attached drawings.

[0080] In addition, the following description defines the compression chamber side as the front and the opposite side as the rear, centered on the piston; and defines the lower shell side as the axially downward and the upper shell side as the axially upward, based on the axial direction of the crankshaft.

[0081] In addition, the following description will be divided into upstream and downstream based on the refrigerant suction path, with the muffler inlet defined as upstream and the muffler outlet as downstream.

[0082] Furthermore, the following description focuses on a reciprocating compressor with an indirect intake system in which the intake pipe is spaced apart from the intake muffler and communicates with the interior of the shell. However, this can be equally applied to direct intake systems where the intake pipe is directly connected to the intake muffler, as well as to close-intake systems.

[0083] FIG. 1 is a perspective view showing the interior of a reciprocating compressor according to the present embodiment through the shell, and FIG. 2 is a cross-sectional view showing the interior of a reciprocating compressor according to FIG. 1.

[0084] Referring to FIGS. 1 and 2, the reciprocating compressor according to the present embodiment may include a shell (110), an electric motor (120) provided in the internal space (110a) of the shell (110) and providing driving force, a compression unit (130) that receives driving force from the electric motor (120) and compresses the refrigerant, and a suction / discharge unit (140) that guides the refrigerant to the compression chamber (130a) and discharges the compressed refrigerant. The shell (110) may be understood to form the exterior of the compressor, and the electric motor (120), the compression unit (130), and the suction / discharge unit (140) may be understood to form the main body (C) of the compressor.

[0085] The shell (110) may include a lower shell (111) and an upper shell (112). The lower shell (111) and the upper shell (112) may be combined to form a sealed internal space (110a). The internal space (110a) of the shell (110) may accommodate a driving unit (120) and a compression unit (130). The shell (110) may be made of a lightweight aluminum alloy with a high thermal conductivity (hereinafter abbreviated as aluminum).

[0086] The lower shell (111) may be formed in a roughly hemispherical shape. A suction pipe (115), a discharge pipe (116), and an oil pipe (not shown) may each be connected to the lower shell (111) by penetrating through it. These suction pipe (115), discharge pipe (116), and oil pipe may each be connected to the lower shell (111) by an insert die-casting method.

[0087] The upper shell (112) can be formed in a roughly hemispherical shape, similar to the lower shell (111). The upper shell (112) can be coupled to the lower shell (111) on the upper side of the lower shell (111) to form the internal space (110a) of the shell (110) described above.

[0088] Referring to FIGS. 1 and 2, the electric motor (or drive motor) (120) according to the present embodiment may include a stator (121) and a rotor (122). The stator (121) is elastically supported against the internal space (110a) of the shell (110), i.e., the bottom surface of the lower shell (111), and the rotor (122) may be rotatably installed inside the stator (121).

[0089] The stator (121) may include a stator core (1211) and a stator coil (1212).

[0090] The stator core (1211) is made of a metal material such as electrical steel, and when voltage is applied from the outside to the motor unit (120), it performs electromagnetic interaction through electromagnetic force together with the stator coil (1212) and rotor (122) to be described later.

[0091] The stator core (1211) is formed in a roughly rectangular shape. For example, the inner surface of the stator core (1211) may be formed in a circular shape, and the outer surface may be formed in a rectangular shape. The stator core (1211) may be fixed to the lower surface of the cylinder block (131) described later by a stator fastening bolt (not shown).

[0092] The stator core (1211) can be elastically supported by a support spring (123) on the bottom surface of the shell (110) while being spaced axially and radially apart from the inner surface of the shell (110). Accordingly, vibrations generated during operation can be suppressed from being directly transmitted to the shell (110).

[0093] The stator coil (1212) can be wound inside the stator core (1211). As previously described, when voltage is applied from the outside, the stator coil (1212) generates an electromagnetic force and performs electromagnetic interaction with the stator core (1211) and the rotor (122). Through this, the motor unit (120) generates a driving force for the reciprocating motion of the compression unit (130).

[0094] The rotor (122) may include a rotor core (1221) and a magnet (1222).

[0095] The rotor core (1221), like the stator core (1211), is made of a metal material such as electrical steel and can be formed in a roughly cylindrical shape. A crank shaft (125) can be press-fitted and coupled to the center of the rotor core (1221). An eccentric portion (1251) is eccentrically formed at one end of the crank shaft (125), and one end of a connecting rod (126) can be rotatably coupled to the eccentric portion (1251). The other end of the connecting rod (126) can be rotatably coupled to a piston (132) to be described later. Accordingly, when the rotor core (1221) rotates, the crank shaft (125) rotates together, and the rotational force of the electric motor (120) is transmitted to the piston (132) through the connecting rod (126) coupled to the eccentric portion (1251) of the crank shaft (125).

[0096] The magnet (1222) is made of a permanent magnet and can be inserted and coupled at equal intervals along the circumferential direction of the rotor core (1221). Accordingly, when voltage is applied, the rotor (122) rotates through electromagnetic interaction with the stator core (1211) and the stator coil (1212).

[0097] Referring to FIGS. 1 and 2, the compression unit (130) according to the present embodiment may include a cylinder block (131) and a piston (132). The cylinder block (131) is elastically supported by a shell (110), and the piston (132) is coupled to a crankshaft (125) by a connecting rod (126) and moves relative to the cylinder block (131).

[0098] The cylinder block (131) may be provided on one axial side of the electric motor (120), for example, on the upper side. The cylinder block (131) may be connected to the stator (121) by a stator-fastening bolt (not shown) and elastically supported on the lower shell (111) together with the stator (121) of the electric motor (120).

[0099] The cylinder block (131) may include a frame portion (1311), a fixed protrusion (1312), a bearing portion (1313), and a cylinder portion (hereinafter abbreviated as cylinder) (1314). The frame portion (1311) is a part that forms the main body of the cylinder block (131), the fixed protrusion (1312) is a part that is coupled to the stator (121) of the electric motor (120), the bearing portion (1313) is a part that supports the crankshaft (125), and the cylinder (1314) is a part into which the piston (132) is slidably inserted to form a compression space (V).

[0100] The frame portion (1311) may be formed in a flat plate shape extending in the transverse direction, or may be formed in a radiating plate shape by reducing the thickness of a portion of the edge excluding the corners. Accordingly, the frame portion (1311) is provided on the upper side of the electric motor portion (120) so that the electric motor portion (120) and the compression portion (130) can be separated.

[0101] The fixed protrusion (1312) may be formed on the edge of the frame portion (1311). For example, the fixed protrusion (1312) may be formed to protrude downward from the edge of the frame portion (1311) toward the electric motor portion (120). Accordingly, the cylinder block (131) can be bolted to the stator (121) and elastically supported on the lower shell (111) together with the stator (121) of the electric motor portion (120).

[0102] The bearing portion (1313) may be formed by extending axially in both directions from the central part of the frame portion (1311). A bearing hole (1313a) may be formed axially through the bearing portion (1313) so that the crankshaft (125) passes through it. Accordingly, the shaft portion (1251) of the crankshaft (125) is inserted into the bearing portion (1313) and supported radially, while the plate portion (1253) of the crankshaft (125) is placed on the top of the bearing portion (1313) and supported axially.

[0103] The cylinder (1314) may be formed radially eccentrically at one edge of the frame portion (1311). The cylinder (1314) is radially perforated so that a piston (132) connected to a connecting rod (126) is inserted into the inner opening, and a valve assembly (141) forming the suction / discharge portion (140) to be described later may be mounted at the outer opening. Accordingly, the piston (132) may be inserted into the interior of the cylinder (1314) to perform linear reciprocating motion, thereby forming a compression chamber (130a).

[0104] According to the present embodiment, the piston (132) may be formed with an open side (rear side) facing the connecting rod (126), while the opposite side, the front side facing away from the connecting rod (126), may be formed in a closed shape. Accordingly, the connecting rod (126) is inserted into the rear side of the piston (132) and rotatably coupled, and the front side of the piston (132) is formed in a closed shape to form a compression chamber (130a) inside the cylinder (1314) together with the valve assembly (141) to be described later.

[0105] Additionally, the piston (132) may be formed from the same material as the cylinder block (131), for example, an aluminum alloy. Accordingly, the transmission of magnetic flux from the rotor (122) to the piston (132) is suppressed, and at the same time, the thermal expansion coefficients of the cylinder block (specifically the cylinder) (131) and the piston (132) are the same, thereby suppressing interference caused by thermal expansion between the cylinder block (131) and the piston (132).

[0106] The suction and discharge unit (140) according to the present embodiment may include a valve assembly (141), a suction muffler (142), and a discharge muffler (143). The valve assembly (141) is a member that opens and closes the compression chamber (130a) of the cylinder block (131), the suction muffler (142) is a member that reduces the suction noise of the refrigerant sucked into the compression chamber (130a), and the discharge muffler (143) is a member that reduces the discharge noise of the refrigerant discharged from the compression chamber (130a).

[0107] The valve assembly (141) may be equipped with an intake valve (not shown) and a discharge valve (not shown) and may be coupled to the end of the cylinder block (131). The intake valve and the discharge valve may be provided separately, but they may typically be formed together on the same valve plate. The intake valve may be formed to open and close in the direction toward the piston (132), while the discharge valve may be formed to open and close in the opposite direction to the intake valve. Accordingly, the intake valve may not have a separate retainer, whereas the discharge valve may have a retainer that limits the opening amount of the discharge valve.

[0108] The suction muffler (142) has an internal suction space (not shown) that attenuates pressure pulsations or noise of the suction refrigerant, and at one end of the suction space, a muffler inlet (1421) indirectly connected to the suction pipe (115) is formed, and at the other end of the suction space, a muffler outlet (1422) directly connected to the suction side of the valve assembly (141) can be formed. Accordingly, the refrigerant sucked in through the suction pipe (115) can flow into the suction space of the suction muffler (142) via the internal space (110a) of the shell (110) and then be sucked into the compression chamber (130a) of the cylinder (1314).

[0109] Referring to FIG. 2, the muffler inlet (1421) and the muffler outlet (1422) of the intake muffler (142) may be connected by a plurality of passages (1424a) (1424b). For example, a first intake passage (hereinafter referred to as the main intake passage) (1424a) and a second intake passage (hereinafter referred to as the sub-intake passage) (1424b) may be formed between the muffler inlet (1421) and the muffler outlet (1422) of the intake muffler (142). The main suction passage (1424a) is formed to communicate with a noise space (e.g., a third noise space) (1423c) located relatively upstream compared to the sub-suction passage (1424b), and the sub-suction passage (1424b) can be formed to communicate with a noise space (e.g., a fourth noise space) (1423d) located relatively downstream compared to the main suction passage (1424a). Accordingly, the flow resistance in the suction space of the suction muffler (142) can be reduced, thereby preventing the suction refrigerant from stagnating in the suction space of the suction muffler (142). Through this, the suction speed of the refrigerant can be increased, or the superheating of the refrigerant can be suppressed, thereby increasing the refrigerant suction amount per unit time (hereinafter abbreviated as refrigerant suction amount) and improving the compressor performance. The suction muffler (142) will be explained again later.

[0110] The discharge muffler (143) has a discharge space formed internally that forms a noise space for the discharged refrigerant, and a discharge inlet / outlet connected to the discharge side of the valve assembly (141) is formed at one end of the discharge space, and a discharge outlet directly connected to the discharge pipe (116) through the loop pipe (117) can be formed at the other end of the discharge space. Accordingly, a low-pressure compressor can be formed in which the refrigerant compressed in the compression chamber (130a) is discharged directly to the outside of the compressor through the loop pipe (118) and the discharge pipe (116) without passing through the internal space (110a) of the shell (110).

[0111] The reciprocating compressor according to the present embodiment as described above operates as follows.

[0112] That is, when power is applied to the electric motor (120), the rotor (122) rotates. When the rotor (122) rotates, the crankshaft (125) connected to the rotor (122) rotates and transmits rotational force to the piston (132) through the connecting rod (126). The piston (132) reciprocates in the forward and backward directions relative to the cylinder (1314) by means of the connecting rod (126).

[0113] For example, when the piston (132) moves backward (intake stroke) in the cylinder (1314), the volume of the compression chamber (130a) increases. Then, the refrigerant filled in the internal space (110a) of the shell (110) through the intake pipe (115) passes through the intake space of the intake muffler (142) and the intake valve of the valve assembly (141) and is sucked into the compression chamber (130a).

[0114] On the other hand, when the piston (132) advances (compression / discharge stroke) in the cylinder (1314), the volume of the compression chamber (130a) decreases. Then, the refrigerant filled in the compression chamber (130a) is compressed and discharged through the discharge valve portion of the valve assembly (141) to the discharge space portion of the discharge muffler (143), and this refrigerant repeats a series of processes in which it is discharged into the refrigeration cycle through the loop pipe (118) and the discharge pipe (116).

[0115] During the suction stroke of the piston (132) as described above, the suction refrigerant flowing into the suction muffler (142) passes through the complex flow path and / or space formed inside the suction muffler (142), and as the flow resistance increases excessively, the suction speed may decrease, or the suction refrigerant may stagnate inside the suction muffler (142), causing the temperature and / or density of the suction refrigerant to increase. As a result, suction loss occurs in the suction muffler (142), and the performance of the compressor may be degraded.

[0116] Accordingly, in this embodiment, the path of the suction refrigerant passing through the suction muffler (142) is simplified to lower the flow resistance within the suction muffler (142), thereby increasing the suction speed while suppressing the superheating of the suction refrigerant. Through this, the suction loss in the suction muffler (142) can be reduced, thereby increasing the performance of the compressor.

[0117] FIG. 3 is a perspective view showing an intake muffler assembled according to the present embodiment, FIG. 4 is a perspective view showing the intake muffler disassembled from FIG. 3, FIG. 5 is a perspective view showing the main intake passage by cutting the intake muffler according to the present embodiment, FIG. 6 is a front view of FIG. 5, FIG. 7 is a perspective view showing the sub-intake passage by cutting the intake muffler according to the present embodiment, FIG. 8 is a front view of FIG. 7, and FIG. 9 is a cross-sectional view taken along line "IX-IX" of FIG. 8.

[0118] Referring to FIGS. 3 through 9, the intake muffler (142) according to the present embodiment may be classified based on its external shape or based on its internal shape. For example, the intake muffler (142) may be classified into a muffler body part (142a) and a muffler fixing part (142b) based on its external shape, and may be classified into a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) based on its internal shape. Below, the intake muffler (142) will be described first based on its external shape, and the intake muffler (142) will be described later based on its internal shape.

[0119] Referring again to FIGS. 1 and 2, the intake muffler (142) according to the present embodiment may include a muffler body part (142a) and a muffler fixing part (142b) based on the external shape. The muffler body part (142a) is a part that reduces vibration noise of the intake refrigerant, and the muffler fixing part (142b) is a part that extends from the muffler body part (142a) and connects the intake muffler (142) to the compression part (130).

[0120] The muffler body portion (142a) and the muffler fixing portion (142b) can be formed as a single unit. For example, the muffler fixing portion (142b) can extend from the upper center of the muffler body portion (142a) toward the intake valve portion of the valve assembly (141). Accordingly, the muffler body portion (142a) can be fixed to the compressor body (C) by the muffler fixing portion (142b).

[0121] In this case, a muffler inlet (1421), a noise space (1423), and a suction passage (1424), which will be described later, are formed inside the muffler body part (142a), and a muffler outlet (1422), which will be described later, can be formed inside the muffler fixing part (142b). Accordingly, the refrigerant flowing into the internal space (110a) of the shell (110) can pass through the muffler body part (142a) and the muffler fixing part (142b) in sequence and be sucked into the compression chamber.

[0122] Additionally, the muffler body (142a) forms a noise space (1423) to be described later inside it, and can typically be formed by combining multiple covers. For example, the muffler body (142a) can be formed by combining a front cover (142c) facing the inner surface of the shell (110) and a rear cover (142d) facing the compressor body (C), or by combining an upper cover (not shown) and a lower cover (not shown). In some cases, the muffler body (142a) can be formed by combining three or more covers or by using a single cover to form a single body. This embodiment illustrates an example in which the muffler body (142a) is formed by combining a front cover and a rear cover.

[0123] Referring to FIGS. 3 to 9, the intake muffler (142) according to the present embodiment may include a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) based on its internal shape. The muffler inlet (1421) is a part that guides the intake refrigerant to the noise space (1423), the muffler outlet (1422) is a part that guides the refrigerant that has passed through the noise space (1423) to the compression chamber (130a), the noise space (1423) is a part that attenuates the vibration and / or noise of the intake refrigerant, and the intake passage (1424) is a part that guides the intake refrigerant passing through the muffler inlet (1421) to the noise space (1423), and the intake refrigerant that has passed through the noise space (1423) to the muffler outlet (1422). Accordingly, the intake refrigerant can be moved from the muffler inlet (1421) through the intake passage (1424) to the noise space (1423), and after the vibration and / or noise is attenuated, it can be sucked into the compression chamber (130a) of the cylinder (1423) through the muffler outlet (1422).

[0124] Referring to FIGS. 3 and 4, the muffler inlet (1421) according to the present embodiment may be formed by penetrating at least one of the front cover (142c) and the rear cover (142d) that form the muffler body part (142a). For example, the muffler inlet (1421) may be formed by penetrating the front cover (142c), by penetrating the rear cover (142d), or by penetrating both the front cover (142c) and the rear cover (142d). The present embodiment illustrates an example in which the muffler inlet (1421) is formed by penetrating the lower half of the front cover (142c).

[0125] The muffler inlet (1421) may be formed by simply penetrating the wall of the muffler body (142a), or it may be formed by being bent to protrude to the outside of the muffler body (142a). If the muffler inlet (1421) is formed by simply penetrating the wall of the muffler body (142a), the volume of the intake muffler (142) can be expanded to effectively attenuate the vibration and / or noise of the intake refrigerant. On the other hand, if the muffler inlet (1421) is formed by protruding to the outside of the muffler body (142a), the intake passage (1424) described later can be formed in various ways. This embodiment illustrates an example in which the muffler inlet (1421) is formed by simply penetrating the muffler body (142a).

[0126] The muffler inlet (1421) can be spaced apart from the end of the suction pipe (115) and open toward the internal space (110a) of the shell (110). Accordingly, the refrigerant can be filled into the internal space (110a) of the shell (110) through the suction pipe (115) and then flow into the interior of the suction muffler (142) through the muffler inlet (1421).

[0127] Referring to FIGS. 3 and 4, the muffler outlet (1422) according to the present embodiment may be formed in at least one of the front cover (142c) and the rear cover (142d) that form the muffler body part (142a). For example, the muffler outlet (1422) may be formed by penetrating the front cover (142c), by penetrating the rear cover (142d), or by penetrating both the front cover (142c) and the rear cover (142d). The present embodiment illustrates an example in which the muffler outlet (1422) is formed by penetrating the upper half of the rear cover (142d).

[0128] For example, the muffler outlet (1422) may be formed by penetrating the interior of the muffler fixing part (142b) extending from the muffler body part (142a). Accordingly, the muffler outlet (1422) may be directly connected to the compression chamber.

[0129] Although not illustrated in the drawing, a filter member (not shown) may be provided at the muffler outlet (1422). For example, a filter member such as a mesh may be provided at the inlet side or outlet side of the muffler outlet (1422), or between the inlet and outlet. Accordingly, foreign substances mixed in the suction refrigerant can be filtered by the filter member and prevented from flowing into the compression chamber (130a) of the cylinder (1314).

[0130] Referring to FIGS. 4 to 9, the noise space (1423) according to the present embodiment is a space formed between the muffler inlet (1421) and the muffler outlet (1422) inside the muffler body part (142a), and may consist of one noise space or a plurality of noise spaces.

[0131] For example, if the noise space (1423) consists of a single space, the main intake passage (1424a) described later is connected to the noise space (1423), whereas the sub-intake passage (1424b) described later does not pass through the noise space (1423) but bypasses the noise space (1423) to directly connect the muffler inlet (1421) and the muffler outlet (1422).

[0132] On the other hand, if there are multiple noise spaces (1423), the multiple noise spaces (1423) may be connected in series or in parallel. In this case, the sub-intake passage (1424b) described later may be connected to a noise space located downstream of the main intake passage (1424a) described later, or it may bypass all of the multiple noise spaces (1423) without passing through them to directly connect the muffler inlet (1421) and the muffler outlet (1422). This embodiment illustrates an example in which the noise spaces (1423) are composed of multiple noise spaces, and the sub-intake passage (1424b) described later is connected to a noise space (1423) located downstream of the noise space (1423) to which the main intake passage (1424a) described later is connected.

[0133] Specifically, the noise space (1423) may be formed into a plurality of noise spaces (1423a) by a partition wall (not shown) protruding from the inner surface of the front cover (142c) and / or the inner surface of the rear cover (142d) facing each other. These plurality of noise spaces (1423) may be connected to the suction passage (1424) and / or other adjacent noise spaces (1423) described later by penetrating the middle of the partition wall (142e), or one end of the partition wall (142e) may be connected to the suction passage (1424) and / or other adjacent noise spaces (1424) described later by being spaced apart from the inner surface of the sealing protrusion (142f) extending along the edge of the front cover (142c) and / or rear cover (142d), or a combination of the former and the latter may be connected. This embodiment illustrates an example in which the end of a partial partition (142e) penetrates the middle of the partial partition (142e) while being spaced apart from the inner surface of the facing cover (e.g., front cover) (142c) (specifically, the inner surface of the sealing protrusion) and communicating with the suction passage (1424) and / or an adjacent noise space (1423) to be described later.

[0134] For example, the noise space (1423) according to the present embodiment is composed of four noise spaces (1423a) (1423b) (1423c) (1423d), and the four (1423a) (1423b) (1423c) (1423d) may be connected to each other by a suction passage (1424) to be described later, or connected to a muffler inlet (1421) and a muffler outlet (1422).

[0135] In other words, one end of the first noise space (1423a) is connected to the muffler inlet (1421), and the other end of the first noise space (1423a) can be connected to the main intake passage (1424a) to be described later. The second noise space (1423b) is connected in series with the first noise space (1423a) and can be connected to the main intake passage (1424a) with the first noise space (1423a) in between. The third noise space (1423c) can be connected to the first noise space (1423a) by the main intake passage (1424a) to be described later, and at the same time, can be connected to the fourth noise space (1423d). One end of the fourth noise space (1423d) is connected to the third noise space (1423c), and the other end of the fourth noise space (1423d) is connected to the main suction passage (1424a) and the third noise space (1423c), and can also be connected to the sub-suction passage (1424b) to be described later. Accordingly, the suction refrigerant flowing into the interior of the suction muffler (142) through the muffler inlet (1421) passes through each noise space (1423a)(1423b)(1423c)(1423d), thereby attenuating the vibration and / or noise of the suction refrigerant.

[0136] Referring to FIGS. 4 through 9, the intake passage (1424) according to the present embodiment may be formed by penetrating the interior of the intake muffler (142), that is, the interior of the front cover (142c) and / or the interior of the rear cover (142d), or may be formed by being recessed into the exterior of the muffler body part (142a), that is, the outer surface of the front cover (142c) and / or the outer surface of the rear cover (142d), or may be formed using a separate conduit spaced apart from the exterior of the muffler body part (142a), that is, the outer surface of the front cover (142c) and / or the outer surface of the rear cover (142d). The present embodiment illustrates an example in which the intake passage (1424) is formed by penetrating the interior of the front cover (142c), that is, between the inner surface and the outer surface of the front cover (142c).

[0137] For example, a passage forming part (1424c) is formed on the inner surface of the front cover (142c) to a predetermined height, and the previously described intake passage (1424) can be formed through the interior of the passage forming part (1424c). Accordingly, the thickness of the front cover (142c) forming the muffler body part (142a) can be formed thinly, while the intake passage (1424) can be smoothly formed inside the front cover (142c).

[0138] Specifically, the suction passage (1424) may consist of a plurality of passages with different flow resistances. The suction passage (1424) may include a main suction passage (or, first suction passage) (1424a) and a sub-suction passage (or, second suction passage) (1424b). The main suction passage (1424a) is a passage that guides the suction refrigerant to pass through as much noise space (1423) as possible, and the sub-suction passage is a passage that guides the suction refrigerant to pass through as little noise space (1423) as possible.

[0139] For example, the inlet (1424a1) of the main intake passage (1424a) may be directly connected to the first noise space (1423a), and the outlet (1424a2) of the main intake passage (1424a) may be directly connected to the third noise space (1423c). In this case, as the second noise space (1423b) is connected to the first noise space (1423a), the inlet (1424a1) of the main intake passage (1424a) may also be indirectly connected to the second noise space (1423b) through the first noise space (1423a). Then, a portion of the suction refrigerant introduced into the first noise space (1423a) and / or the second noise space (1423b) passes sequentially through the third noise space (1423c) and the fourth noise space (1423d) via the main suction passage (1424a), and is then sucked into the compression chamber (130a) of the cylinder (1314) through the muffler outlet (1422) connected to the fourth suction space (1423d). Accordingly, the suction refrigerant passing through the main suction passage (1424a) has its vibration and / or noise attenuated in the third noise space (1423c) and the fourth noise space (1423d), respectively, thereby effectively attenuating the vibration and / or noise of the suction refrigerant.

[0140] On the other hand, the inlet (1424b1) of the sub-intake passage (1424b) is directly connected to the first noise space (1423a), and the outlet (1424b2) of the sub-intake passage (1424b) can be directly connected to the fourth noise space (1423d). In other words, the inlet of the sub-intake passage (1424b) is connected to the same noise space (1423) as the main intake passage (1424a), whereas the outlet of the sub-intake passage (1424b), unlike the main intake passage (1424a), can be directly connected to the fourth noise space (1423d) by crossing the third noise space (1423c). Then, another portion of the suction refrigerant introduced into the first noise space (1423a) and / or the second noise space (1423b) is introduced into the fourth noise space (1423d) through the sub-suction passage (1424b) and is then sucked into the compression chamber (130a) of the cylinder (1314) through the muffler outlet (1422) connected to the fourth noise space (1423d). Accordingly, the suction refrigerant passing through the sub-suction passage (1424b) receives less flow resistance compared to the suction refrigerant passing through the main suction passage (1424a), allowing it to move quickly toward the muffler outlet (1422). At the same time, the temperature and / or density of the suction refrigerant moving from the muffler inlet (1421) to the muffler outlet (1422) can be lowered. Through this, the amount of refrigerant sucked into the compression chamber (130a) through the suction muffler (142) is increased, thereby improving the compressor performance.

[0141] In this case, the inlet side cross-sectional area (e.g., inlet side inner diameter) of the sub-suction passage (1424b) may be formed to be smaller than or equal to the inlet side cross-sectional area (e.g., inlet side inner diameter) of the main suction passage (1424a). For example, the inlet side cross-sectional area of ​​the sub-suction passage (1424b) may be formed to be smaller than the inlet side cross-sectional area of ​​the main suction passage (1424a). Accordingly, while reducing the suction loss due to refrigerant overheating in the suction muffler (142), it is possible to suppress the excessive inflow of the suction refrigerant from the suction muffler (142) toward the sub-suction passage (1424b), where the flow resistance is relatively low. Through this, the large amount of refrigerant flowing into the suction muffler (142) can pass through a plurality of noise spaces (1423) sequentially via the main suction passage (1424a), thereby effectively attenuating vibration and / or noise of the suction refrigerant.

[0142] In addition, in this case, the sub-suction passage (1424b) may be formed upstream of the main suction passage (1424a) based on the suction path of the suction refrigerant. For example, the inlet (1424b1) of the sub-suction passage (1424b) may be formed closer to the muffler inlet (1421) than the inlet (1424a1) of the main suction passage (1424a). Accordingly, even if the cross-sectional area of ​​the inlet side of the sub-suction passage (1424b) is formed to be smaller than the cross-sectional area of ​​the inlet side of the main suction passage (1424a), a certain amount of suction refrigerant can flow smoothly into the sub-suction passage (1424b). Through this, vibration and / or noise regarding the entire suction refrigerant can be sufficiently attenuated, while suction loss due to refrigerant overheating of the suction refrigerant can be reduced.

[0143] In addition, in this case, the sub-suction passage (1424b) may be formed with the same cross-sectional area between both ends. For example, the sub-suction passage (1424b) may be formed with the same cross-sectional area (or inner diameter) from the inlet (1424b1) to the outlet (1424b2). Accordingly, the flow resistance in the sub-suction passage (1424b) can be kept constant while facilitating the processing of the sub-suction passage (1424b).

[0144] Although not illustrated in the drawing, the cross-sectional area between the two ends of the sub-suction passage (1424b) may be formed differently. For example, the cross-sectional area on the inlet side of the sub-suction passage (1424b) may be formed larger or smaller than the cross-sectional area on the outlet side. In the former case, the refrigerant flow velocity at the outlet of the sub-suction passage (1424b) can be increased to further increase the overall refrigerant flow velocity, and in the latter case, the pressure at the outlet (1424b2) of the sub-suction passage (1424b) can be lowered to further reduce the overall suction loss.

[0145] Meanwhile, the muffler fixing part (142b) may extend from the muffler body part (142a). For example, the muffler fixing part (142b) may be bent and extended toward the suction valve of the valve assembly (141) from the upper side of the muffler body part (142a), that is, from the side opposite the muffler inlet (1421). In this case, the muffler outlet (1422) may be formed by penetrating between the two ends of the muffler fixing part (142b). Accordingly, the suction refrigerant moving to the final noise space (e.g., the fourth noise space) of the muffler body part (142a) may move toward the suction valve through the muffler outlet (1422) provided inside the muffler fixing part (142b), pass through the suction valve, and be sucked into the compression chamber (130a).

[0146] In this way, the flow resistance in some of the multiple suction passages is reduced, allowing a portion of the suction refrigerant to be rapidly drawn into the compression chamber through those passages. This increases the amount of refrigerant drawn into the compression chamber per unit time through the suction muffler, thereby improving compressor performance.

[0147] In addition, refrigerant passing through a suction passage with low flow resistance passes through the suction passage quickly, which can reduce suction loss due to superheating inside the suction muffler. Through this, the suction amount of refrigerant drawn into the compression chamber through the suction muffler per unit time can be increased.

[0148] In addition, some other intake passages pass through multiple noise-reducing spaces sequentially, thereby attenuating the vibration and / or noise of the intake refrigerant. This allows for an increase in the amount of refrigerant drawn into the compression chamber while effectively reducing pressure pulsation and / or intake noise of the refrigerant passing through the intake muffler.

[0149] In addition, since multiple intake passages are formed inside the muffler body that constitutes the intake muffler, the refrigerant intake volume can be increased while keeping the exterior of the intake muffler simple, thereby lowering the manufacturing cost of the intake muffler. At the same time, interference between the intake muffler and other components is reduced, allowing the intake muffler to be formed as large as possible or the compressor to be miniaturized.

[0150] Meanwhile, other embodiments of the intake muffler are as follows.

[0151] That is, in the above-described embodiment, the sub-intake passage is formed inside the intake muffler, but in some cases, the sub-intake passage may be formed outside the intake muffler.

[0152] FIG. 10 is an exploded perspective view of another embodiment of the suction passage, FIG. 11 is a cross-sectional view of FIG. 10 to explain the suction passage, FIG. 12 is an exploded perspective view of yet another embodiment of the suction passage, and FIG. 13 is a cross-sectional view of FIG. 12 to explain the suction passage.

[0153] The basic configuration of the intake muffler (142) according to the present embodiment is similar to the embodiments described above. For example, the intake muffler (142) may have a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) formed inside it.

[0154] Additionally, the intake passage (1424) may include a main intake passage (1424a) and a sub-intake passage (1424b). The main intake passage (1424a) is formed to connect a noise space (1423) that communicates with the muffler inlet (1421) and another noise space (e.g., a third noise space) (1423c) located downstream of the noise space (1423), and the sub-intake passage (1424b) may be formed so that its outlet (1424b2) connects to another noise space (e.g., a fourth noise space) (1423d) located downstream of the noise space (e.g., a third noise space) (1423c) that communicates with the outlet (1424a2) of the main intake passage (1424a). The basic configuration of the main suction passage (1424a) and the sub-suction passage (1424b) and the resulting effects are similar to those of the previously described embodiments, so the description thereof is replaced by the description of the previously described embodiments.

[0155] However, in this embodiment, the sub-intake passage (1424b) may be formed outside the intake muffler (162). For example, the sub-intake passage (1424b) may be formed on the outer surface of the muffler body part (142a). In other words, as in the previously described embodiment, the inlet (1424b1) of the sub-intake passage (1424b) is connected to the first noise space (1423a), and the outlet (1424b2) of the sub-intake passage (1424b) is connected to the fourth noise space (1423d), respectively, but the sub-intake passage (1424b) may be formed outside the muffler body part (142a) by bypassing the third noise space (1423c).

[0156] The sub-intake passage (1424b) according to the present embodiment may be formed on the outer surface of the muffler body part (142a). In other words, the sub-intake passage (1424b) may be formed by forming a groove on the outer surface of the muffler body part (142a) and inserting a separate connecting member into the groove.

[0157] For example, a cover plate (1424e) may be applied as the connecting member. For example, as shown in FIGS. 10 and 11, a connecting passage (1424d) may be formed by being recessed to a predetermined depth on the outer surface of the front cover (142c) forming the muffler body part (142a), and a cover plate (1424e) may be inserted into the outer opening of the connecting passage (1424d) to form a sub-suction passage (1424b).

[0158] In this case, an inlet section (1424d1) communicating with the first noise space (1423a) and an outlet section (1424d2) communicating with the fourth noise space (1423d) are formed at both ends of the connecting passage (1424d), and the inlet section (1424d1) and the outlet section (1424d2) can be connected to each other by a cover plate (1424e) inserted into the connecting passage (1424d). Accordingly, a sub-suction passage (1424b) is formed on the outer surface of the muffler body section (142a), so the sub-suction passage (1424b) can be easily formed. Furthermore, as the sub-suction passage (1424b) is formed on the outside of the muffler body section (142a), the cross-sectional area of ​​the sub-suction passage (1424b) can be appropriately adjusted.

[0159] In addition, in this case, the cover plate (1424e) may be formed of the same material as the front cover (142c) of the intake muffler (142), or may be formed of a different material from the front cover (142c) of the intake muffler (142), for example, a material having a lower heat transfer coefficient and / or lower hardness compared to the front cover (142c). In the former case, the manufacturing and / or assembly of the intake muffler (142) including the sub-intake passage (1424b) is simplified, and in the latter case, the intake refrigerant passing through the sub-intake passage (1424b) can be more effectively suppressed from being heated by the internal heat of the shell (110).

[0160] As another example, a connecting pipe (1424f) may be applied as the connecting member. For example, as shown in FIGS. 12 and 13, a connecting passage (1424d) may be formed by being recessed to a predetermined depth on the outer surface of the front cover (142c) forming the muffler body part (142a), and a connecting pipe (1424f) may be inserted into the connecting passage (1424d) to form a sub-suction passage (1424b).

[0161] In this case, an inlet section (1424d1) communicating with the first noise space (1423a) and an outlet section (1424d2) communicating with the fourth noise space (1423d) are formed at both ends of the connecting passage (1424d), and the inlet section (1424d1) and the outlet section (1424d2) can be connected to each other by a connecting pipe (1424f) inserted into the connecting passage (1424d). Accordingly, a sub-suction passage (1424b) is formed on the outer surface of the muffler body section (142a), so the sub-suction passage (1424b) can be easily formed. Furthermore, as the sub-suction passage (1424b) is formed on the outside of the muffler body section (142a), the cross-sectional area of ​​the sub-suction passage (1424b) can be appropriately adjusted.

[0162] In addition, in this case, the connecting pipe (1424f) may be formed of the same material as the front cover (142c) of the intake muffler (142), or may be formed of a different material from the front cover (142c) of the intake muffler (142), for example, a material having a lower heat transfer coefficient and / or lower hardness compared to the front cover (142c). In the former case, the fabrication and / or assembly of the intake muffler (142) including the sub-intake passage (1424b) is simplified, and in the latter case, the intake refrigerant passing through the sub-intake passage (1424b) can be more effectively suppressed from being heated by the internal heat of the shell (110).

[0163] As described above, when the sub-intake passage (1424b) is formed on the outer surface of the muffler body part (142a), the sub-intake passage (1424b) can be easily formed while maintaining the total volume of the intake muffler including the sub-intake passage. Furthermore, the cross-sectional area of ​​the sub-intake passage (1424b) can be secured without reducing the volume of the noise space (1423).

[0164] Meanwhile, another embodiment of the intake muffler is as follows.

[0165] That is, in the aforementioned embodiments, the sub-intake passage is formed to penetrate the muffler body or to be in contact with the muffler body, but in some cases, the sub-intake passage may be formed spaced apart from the muffler body.

[0166] FIG. 14 is a cross-sectional view shown to illustrate another embodiment of the suction passage, and FIG. 15 is a cross-sectional view shown to illustrate another embodiment of the suction passage.

[0167] The basic configuration of the intake muffler (142) according to the present embodiment is similar to the embodiments described above. For example, the intake muffler (142) may have a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) formed inside it.

[0168] Additionally, the intake passage (1424) may include a main intake passage (1424a) and a sub-intake passage (1424b). The main intake passage (1424a) is formed to connect a noise space (1423) that communicates with the muffler inlet (1421) and another noise space (e.g., a third noise space) (1423c) located downstream of the noise space (1423), and the sub-intake passage (1424b) may be formed so that its outlet (1424b2) connects to another noise space (e.g., a fourth noise space) (1423d) located downstream of the noise space (e.g., a third noise space) that communicates with the outlet (1424a2) of the main intake passage (1424a). The basic configuration of the main suction passage (1424a) and the sub-suction passage (1424b) and the resulting effects are similar to those of the previously described embodiments, so the description thereof is replaced by the description of the previously described embodiments.

[0169] However, the sub-intake passage (1424b) according to the present embodiment may be formed by a connecting member connecting the first noise space (1423a) and the fourth noise space (1423d). In this case, the outer surface of the connecting member may be in contact with the outer surface of the muffler body part (142a), or it may be spaced apart by a predetermined distance. In the former case, the volume of the intake muffler (142) including the connecting member can be minimized as much as possible while the sub-intake passage (1424b) is formed outside the muffler body part (142a), and in the latter case, the intake refrigerant passing through the sub-intake passage (1424b) can be effectively suppressed from being heated by the refrigerant passing through the interior of the muffler body part (142a). The present embodiment illustrates an example in which the connecting member is spaced apart from the muffler body part (142a) by a predetermined distance.

[0170] For example, referring to FIG. 14, an inlet (1424d1) of a communication passage (1424d) may be formed in the lower half of the front cover (142c) forming the muffler body part (142a) according to the present embodiment, and an outlet (1424d2) of the communication passage (1424d) may be formed in the upper half of the front cover (142c). The inlet (1424d1) of the communication passage (1424d) may pass through the muffler body part (142a) to communicate with the first noise space (1423a), and the outlet (1424d2) of the communication passage (1424d) may pass through the muffler body part (142a) to communicate with the fourth noise space (1423d). Accordingly, one end of the connecting pipe (1424f) can be inserted into the inlet (1424d1) of the connecting passage (1424d) and connected to the first noise space (1423a), and the other end of the connecting pipe (1424f) can be inserted into the outlet (1424d2) of the connecting passage (1424d) and connected to the fourth noise space (1423d).

[0171] In this case, the outer surface between the two ends of the connecting pipe (1424f), that is, between the inlet and outlet of the connecting pipe (1424f), can be spaced apart from the outer surface of the muffler body (142a) by a predetermined distance. Accordingly, the sub-intake passage (1424b) can be spaced apart from the muffler body (142a), while the first noise space (1423a) communicating with the muffler inlet (1421) and the fourth noise space (1423d) communicating with the muffler outlet (1422) can be directly connected.

[0172] In addition, in this case, the connecting pipe (1424f) may be formed of the same material as the front cover (142c) of the intake muffler (142), or may be formed of a different material from the intake muffler (142), for example, a material having a lower heat transfer coefficient and / or lower hardness compared to the intake muffler (142). In the former case, the manufacturing of the intake muffler (142) including the connecting pipe (1424f) is simplified, and in the latter case, the heating of the intake refrigerant passing through the sub-intake passage (1424b) can be suppressed more effectively.

[0173] As described above, when the sub-intake passage (1424b) is spaced apart from the muffler body (142a), not only can the volume of the noise space (1423) be reduced by the sub-intake passage (1424b), but the refrigerant passing through the sub-intake passage (1424b) can also be prevented from being heated by the refrigerant passing through the interior of the muffler body (142a), thereby more effectively preventing the intake refrigerant from overheating.

[0174] As another example, as shown in FIG. 15, the sub-intake passage (1424b) is spaced apart from the muffler body part (142a), and the end of the connecting pipe (1424f) forming the outlet (1424b2) of the sub-intake passage (1424b) can be connected to the middle of the muffler outlet (1422) by penetrating the middle of the muffler fixing part (142b).

[0175] In this case as well, the inlet portion (1424d1) of the connecting passage (1424d) may pass through the muffler body portion (142a) to communicate with the first noise space (1423a), and the outlet portion (1424d2) of the connecting passage (1424d) may pass through the muffler fixing portion (142b) to communicate with the muffler outlet (1422).

[0176] One end of the connecting pipe (1424f) is inserted into the inlet (1424d1) of the connecting passage (1424d) and connected to the first noise space (1423a), and the other end of the connecting pipe (1424f) is inserted into the outlet (1424d2) of the connecting passage (1424d) and connected to the muffler outlet (1422).

[0177] As described above, when the outlet (1424b2) of the sub-suction passage (1424b) is connected to the muffler fixing part (142b), the sub-suction passage (1424b) can be connected directly to the muffler outlet (1422) without passing through the noise space (e.g., the fourth noise space) (1423d). Accordingly, the flow resistance of the refrigerant passing through the sub-suction passage (1424b) is further lowered, thereby more effectively suppressing the superheating of the suction refrigerant.

[0178] Meanwhile, another embodiment of the intake muffler is as follows.

[0179] That is, in the aforementioned embodiments, a plurality of intake passages are connected to a single muffler inlet, but in some cases, a plurality of intake passages may be connected to a plurality of muffler inlets.

[0180] FIG. 16 is an exploded perspective view of another embodiment of a muffler inlet, FIG. 17 is a cross-sectional view of the assembled muffler inlet of FIG. 16, and FIG. 18 is a cross-sectional view of yet another embodiment of a muffler inlet assembled.

[0181] The basic configuration of the intake muffler (142) according to the present embodiment is similar to the embodiments described above. For example, the intake muffler (142) may have a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) formed inside it.

[0182] Additionally, the intake passage (1424) may include a main intake passage (1424a) and a sub-intake passage (1424b). The main intake passage (1424a) is formed to connect a noise space (1423) that communicates with the muffler inlet (1421) and another noise space (e.g., a third noise space) (1423c) located downstream of the noise space (1423), and the sub-intake passage (1424b) may be formed so that its outlet (1424b2) connects to another noise space (e.g., a fourth noise space) (1423d) located downstream of the noise space (e.g., a third noise space) that communicates with the outlet (1424a2) of the main intake passage (1424a). The basic configuration of the main suction passage (1424a) and the sub-suction passage (1424b) and the resulting effects are similar to those of the previously described embodiments, so the description thereof is replaced by the description of the previously described embodiments.

[0183] However, as shown in FIGS. 16 and 17, in this embodiment, the suction guide (1425) is inserted into the muffler inlet (1421), and the main guide passage (1425a) and the sub guide passage (1425b) may be formed separately from each other. In this case, the outlet of the main guide passage (1425a) may be formed adjacent to the inlet (1424a1) of the main suction passage (1424a), and the outlet of the sub guide passage (1425b) may be formed adjacent to the inlet (1424b1) of the sub suction passage (1424b). Accordingly, a portion of the suction refrigerant may be guided toward the main suction passage (1424a) through the main guide passage (1425a), and another portion of the suction refrigerant may be guided toward the sub suction passage (1424b) through the sub guide passage (1425b).

[0184] Specifically, the exit of the main guide passage (1425a) and the exit of the sub-guide passage (1425b) can be formed to be connected to the first noise space (1423a), respectively. In other words, the exit of the main guide passage (1425a) and the exit of the sub-guide passage (1425b) can be formed to be open toward the first noise space (1423a), respectively.

[0185] For example, the main guide passage (1425a) may be formed to penetrate between both ends of the suction guide (1425) from the center of the suction guide (1425), and the sub guide passage (1425b) may be formed to penetrate between both ends of the suction guide (1425) from one side of the main guide passage (1425a). In other words, the main guide passage (1425a) and the sub guide passage (1425b) may be formed by penetrating from the outer surface forming one end of the suction guide (1425) to the inner surface forming the other end of the suction guide (1425).

[0186] In this case, the inner surface of the suction guide (1425) can be formed in various shapes depending on the position of the main suction passage (1424a) and the sub-suction passage (1424b). For example, if the inlet (1424b1) of the sub-suction passage (1424b) is located upstream (e.g., on the outer side) with respect to the refrigerant suction path compared to the inlet (1424a1) of the main suction passage (1424a), the outlet of the sub-guide passage (1425b) can be formed at an angle so that it is located upstream (e.g., on the outer side) compared to the outlet of the main guide passage (1425a). Accordingly, the exit of the main guide passage (1425a) extends deeper into the interior of the muffler body (142a) than the exit of the sub guide passage (1425b), and the exit of the main guide passage (1425a) can be formed adjacent to the entrance (1424a1) of the main suction passage (1424a), and the exit of the sub guide passage (1425b) can be formed adjacent to the entrance (1424b1) of the sub suction passage (1424b).

[0187] As described above, when a suction guide (1425) having a main guide passage (1425a) and a sub guide passage (1425b) is provided at the muffler inlet (1421), even if the main suction passage (1424a) and the sub suction passage (1424b) are separated from each other, the suction refrigerant can be appropriately distributed by the suction guide (1425) and moved to both suction passages (1424a) (1424b). Accordingly, the superheating of the suction refrigerant in the suction muffler (142) during refrigerant suction can be suppressed more effectively.

[0188] Although not illustrated in the drawing, the inner surface of the suction guide (1425) may be formed with a step. In this case, the exit of the main guide passage (1425a) may extend deeper into the interior of the muffler body (142a) than the exit of the sub-guide passage (1425b).

[0189] Additionally, although not illustrated in the drawing, the sub-guide passage (1425b) may be formed by being recessed to a predetermined depth on the outer surface of the suction guide (1425) to longitudinally extend between both ends of the suction guide (1425). In this case, the sub-guide passage (1425b) of the suction guide (1425) can be easily formed.

[0190] In another embodiment, a suction guide (1425) having a main guide passage (1425a) and a sub-guide passage (1425b) is inserted into a muffler inlet (1421), wherein the main guide passage (1425a) may be independently connected to the main suction passage (1424a) and the sub-guide passage (1425b) may be independently connected to the sub-suction passage (1424b).

[0191] For example, as shown in FIG. 18, the main guide passage (1425a) is formed by penetrating between the outer surface forming one end of the suction guide (1425) and the inner surface forming the other end, and the sub guide passage (1425b) can be formed by penetrating from the outer surface of the suction guide (1425) to the outer circumference. Accordingly, the exit of the main guide passage (1425a) is connected to the main suction passage (1424a) with the first noise space (1423a) in between, whereas the exit of the sub guide passage (1425b) can be directly connected to the entrance (1424b1) of the sub suction passage (1424b).

[0192] As described above, when a plurality of suction passages (1424a) (1424b) are independently connected to a plurality of guide passages (1425a) (1425b), the suction refrigerant passing through the main guide passage (1425a) passes through the first noise space (1423a) toward the main suction passage (1424a), and the suction refrigerant passing through the sub-guide passage (1425b) moves directly toward the sub-suction passage (1424b) without passing through the first noise space (1423a). Accordingly, a portion of the suction refrigerant moves quickly to the compression chamber (130a) without passing through the complex internal flow path of the suction muffler (142), thereby more effectively attenuating vibration and / or noise in the suction muffler (142) and further suppressing the superheating of the suction refrigerant in the suction muffler (142), thereby further reducing suction loss.

[0193] Although not illustrated in the drawing, in this case, the sub-guide passage (1425b) is formed to be recessed to a predetermined depth on the outer surface of the suction guide (1425), and may also be extended along the longitudinal direction from the outer surface forming one end of the suction guide (1425) to the length connected to the sub-suction passage. In this case, the sub-guide passage (1425b) of the suction guide (1425) can be easily formed.

[0194] Meanwhile, another embodiment of the intake muffler is as follows.

[0195] That is, in the aforementioned embodiments, the muffler inlet is formed in the muffler body, but in some cases, the muffler inlet may be formed on the outside of the muffler body.

[0196] FIG. 19 is a perspective view showing another embodiment of an intake muffler, FIG. 20 is a perspective view showing the intake muffler of FIG. 19 disassembled, and FIG. 21 is a cross-sectional view showing the intake muffler of FIG. 20 assembled.

[0197] The basic configuration of the intake muffler (142) according to the present embodiment is similar to the embodiments described above. For example, the intake muffler (142) may have a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) formed inside it.

[0198] Additionally, the intake passage (1424) may include a main intake passage (1424a) and a sub-intake passage (1424b). The main intake passage (1424a) is formed to connect between the muffler inlet (1421) and the noise space (1423), and the sub-intake passage (1424b) may be formed so that its outlet (1424b2) connects to another noise space (e.g., a second noise space) (1423b) located downstream of the noise space (e.g., a first noise space) (1423a) to which the outlet (1424a2) of the main intake passage (1424a) communicates. Since the basic configuration of the main intake passage (1424a) and the sub-intake passage (1424b) and the resulting effects are similar to the previously described embodiments, the description thereof will be replaced by the description of the previously described embodiments.

[0199] However, in this embodiment, the muffler inlet (1421) is formed on the outside of the muffler body part (142a), and the muffler inlet (1421) may be formed at one end of a muffler extension part (1426) that extends long from the outer surface of the muffler body part (142a) toward the inner surface of the shell (110). For example, the muffler extension part (1426) may extend long from the side of the muffler body part (142a) toward the suction pipe (115), and the muffler inlet (1421) may be formed at one end of the muffler extension part (1426) facing the suction pipe (115). Accordingly, the muffler inlet (1421) is positioned adjacent to the suction pipe (115), so that the suction refrigerant flowing into the internal space (110a) of the shell (110) through the suction pipe (115) can move quickly toward the suction muffler (142).

[0200] Referring to FIGS. 19 to 21, the muffler extension portion (1426) according to the present embodiment may be formed by extending from the front cover (142c) and the rear cover (142d) that form the muffler body portion (142a), respectively. For example, the muffler extension portion (1426) may include a front extension portion (1426a) and a rear extension portion (1426b). The front extension portion (1426a) may extend from the outer surface of the front cover (142c), and the rear extension portion (1426b) may extend from the outer surface of the rear cover (142d). A sealing protrusion (142f) that interlocks with one another may be formed on one side of the front extension portion (1426a) and on one side of the rear extension portion (1426b) facing it. Accordingly, a type of noise space (hereinafter referred to as the third noise space) can be formed between the front extension (1426a) and the rear extension (1426b), for example, in the middle of the sub-suction passage (1424b), so that vibration and / or noise generated during refrigerant suction can be reduced more effectively.

[0201] In this case, noise of a specific frequency band is attenuated in the intermediate opening (1427c) described later and in the noise space (e.g., the first noise space) (1423a) communicating with the intermediate opening (1427c), whereas noise of a wide frequency band can be attenuated in the inlet and outlet (1424b1) (1424b2) of the sub-intake passage (1424b) and in the passage noise section (1424b3) formed in the middle of the sub-intake passage (1424b). Accordingly, the overall noise attenuation effect of the intake muffler (142) according to the present embodiment can be improved.

[0202] The main suction passage (1424a) and the sub-suction passage (1424b) may be formed between the front extension (1426a) and the rear extension (1426b), or only one of the main suction passage (1424a) and the sub-suction passage (1424b) may be formed between the front extension (1426a) and the rear extension (1426b), and the other suction passage (1424) may be formed on either of the front extension (1426a) or the rear extension (1426b). In the former case, the shapes of both suction passages (1424) can be formed in various ways, and in the latter case, some of the suction passages (1424) can be easily formed. This embodiment illustrates the latter case, that is, an example in which only the sub-suction passage (1424b) is formed between the front extension (1426a) and the rear extension (1426b).

[0203] Specifically, the main suction passage (1424a) according to the present embodiment may be composed of a plurality of passage sections spaced apart from each other along the refrigerant suction path. For example, the main suction passage (1424a) may include an inlet side passage section (1427a), an outlet side passage section (1427b), and an intermediate opening section (1427c). The inlet side passage section (1427a) is a part that opens toward the muffler inlet (1421), the outlet side passage section (1427b) is a part that opens toward the muffler outlet (1422), and the intermediate opening section (1427c) is a part that opens toward the noise space (1423) between the muffler inlet (1421) and the muffler outlet (1422).

[0204] The inlet side passage section (1427a) is formed in the rear cover (142d) forming the muffler body section (142a), and may be formed by penetrating the muffler body section (142a). For example, one end of the inlet side passage section (1427a) may be formed in a conduit shape on one side of the muffler extension section (1426), and the other end of the inlet side passage section (1427a) may be formed in a conduit shape on one side of the muffler body section (142a). Accordingly, one end of the inlet side passage (1427a) is extended as close as possible to the suction pipe (115) to increase the amount of refrigerant sucked into the compression chamber (130a), while the other end of the inlet side passage (1427a) is extended as deeply as possible into the interior of the muffler body (142a) to effectively suppress the backflow of refrigerant introduced into the noise space (1423) toward the muffler inlet (1421).

[0205] The outlet side passage (1427b) is formed in the front cover (142c) forming the muffler body (142a), but can be formed inside the muffler body (142a). For example, the outlet side passage (1427b) can be formed at an angle predetermined relative to the inlet side passage (1427a) inside the muffler body (142a). In other words, the main suction passage (1424a) can be formed by being bent at the intermediate opening (1427c), which will be described later, located between the inlet side passage (1427a) and the outlet side passage (1427b). Accordingly, a kind of stagnation can be formed at the intermediate opening (1427c), which will be described later, before the suction refrigerant moves from the inlet side passage (1427a) to the outlet side passage (1427b). Through this, most of the suction refrigerant moves smoothly from the middle of the main suction passage (1424a) to the corresponding noise space (1423), thereby effectively attenuating the vibration noise of the refrigerant passing through the main suction passage (1424a). The same applies to the suction noise flowing back from the outlet side passage (1427b) to the inlet side passage (1427a).

[0206] An intermediate opening (1427c) may be formed between the inlet side passage (1427a) and the outlet side passage (1427b). For example, the intermediate opening (1427c) may be formed between the downstream end of the inlet side passage (1427a) and the upstream end of the outlet side passage (1427b) facing it, with respect to the refrigerant suction path.

[0207] The intermediate opening (1427c) may be connected to a noise space (e.g., a first noise space) (1423a) located upstream of the refrigerant suction path, for example, a noise space (e.g., a third noise space) (1423c) to which the outlet (1424b2) of the sub-suction passage (1424b) is connected. Accordingly, a portion of the refrigerant sucked into the muffler outlet (1422) through the main suction passage (1424a) moves to the corresponding noise space (1423) through the intermediate opening (1427c), thereby reducing pressure pulsation generated during refrigerant suction. At the same time, noise generated during refrigerant suction and flowing back toward the muffler inlet (1421) can be attenuated by moving to the corresponding noise space (1423) through the previously described intermediate opening (1427c).

[0208] The intermediate opening (1427c) may be formed as at least one hole (not shown) penetrating into the corresponding noise space (1423) between the inlet side passage (1427a) and the outlet side passage (1427b), and the intermediate opening (1427c) may be formed such that the inlet side passage (1427a) and the outlet side passage (1427b) facing it are spaced apart by a predetermined interval along the perimeter of the main suction passage (1424a). In the former case, the periphery of the intermediate opening (1427c) is partially blocked so that the suction refrigerant can move quickly toward the muffler outlet (1422), and in the latter case, the two extensions (1426a) (1426b) are spaced apart to form the intermediate opening (1427c), thereby allowing the main suction passage (1424a) including the intermediate opening (1427c) to be easily formed. This embodiment illustrates the latter case, that is, an example in which the inlet side passage (1427a) and the outlet side passage (1427b) are spaced apart from each other along the periphery of the main suction passage (1424a).

[0209] The sub-suction passage (1424b) according to the present embodiment is formed on one side of the main suction passage (1424a), and can be formed between the front extension (1426a) and the rear extension (1426b) as described above. For example, a sealing protrusion (142f) that interlocks with each other is formed on the front extension (1426a) and the rear extension (1426b), and the sub-suction passage (1424b) described above can be formed in the space formed along the inner circumference of these sealing protrusions (142f). Accordingly, since the sub-suction passage (1424b) is formed between both extensions (1426a) and (1426b), the injection molding is relatively simple compared to being formed on a single extension (e.g., the rear extension) (1426b) like the main suction passage (1424a), and it can be formed in various shapes.

[0210] In this case, the cross-sectional area between the inlet (1424b1) and the outlet (1424b2) of the sub-suction passage (1424b) may be formed to be uniformly the same overall, or it may be formed differently. In the former case, flow resistance in the sub-suction passage (1424b) is minimized so that the refrigerant moves quickly toward the muffler outlet (1422), thereby effectively suppressing refrigerant overheating. In the latter case, the intermediate cross-sectional area of ​​the sub-suction passage (1424b) may be formed larger than the cross-sectional area of ​​the main suction passage (1424a), thereby forming a passage noise section (1424b3) that constitutes a kind of noise space inside the sub-suction passage (1424b), so that vibration and / or noise generated during refrigerant suction can be more effectively attenuated. This embodiment illustrates the latter case, that is, an example in which the intermediate cross-sectional area of ​​the sub-suction passage (1424b) is formed relatively widely.

[0211] In addition, in this case, the inlet (1424b1) and / or outlet (1424b2) of the sub-suction passage (1424b) may be formed to be smaller than or equal to the cross-sectional area of ​​the main suction passage (1424a). For example, while the main suction passage (1424a) is formed to have the same or nearly equal cross-sectional area between both ends, the cross-sectional area of ​​the inlet (1424b1) and / or outlet (1424b2) of the sub-suction passage (1424b) may be formed to be smaller than the cross-sectional area of ​​the main suction passage (1424a). Accordingly, the excessive inflow of refrigerant moving from the muffler inlet (1421) to the muffler outlet (1422) into the sub-suction passage (1424b) can be suppressed, thereby effectively attenuating vibrations and / or noise generated during refrigerant suction.

[0212] As described above, when the muffler inlet (1421) is formed outside the muffler body part (142a), that is, at one end of the muffler extension part (1426) that extends from the muffler body part (142a) toward the shell (110), the muffler inlet (1421) can be formed close to the suction pipe (115). Accordingly, the refrigerant sucked into the internal space (110a) of the shell (110) through the suction pipe (115) can be rapidly introduced into the interior of the suction muffler (142) through the muffler inlet (1421) located adjacent to the suction pipe (115). Then, the suction refrigerant can be suppressed from being overheated by the internal heat of the shell (110), thereby further improving the amount of refrigerant sucked.

[0213] In addition, in this case, the length of the main intake passage (1424a) and / or the sub-intake passage (1424b) may be extended to the length of the muffler extension (1426). By doing so, the length of the intake passage (1424), which forms a kind of neck, is increased, thereby improving the noise reduction effect in the intake muffler (142).

[0214] In addition, in this case, as a part of the intake passage (1424), for example, at least a part of the sub-intake passage (1424b) is formed outside the muffler body part (142a), the sub-intake passage (1424b) can be spaced apart from the noise space (1423) by a predetermined distance. Through this, the refrigerant passing through the sub-intake passage (1424b) can be effectively suppressed from being overheated by the internal heat of the noise space (1423), thereby further reducing the intake loss.

[0215] In addition, in this case, the main intake passage (1424a) and the sub-intake passage (1424b) are respectively formed in the muffler extension part (1426) extending from the muffler body part (142a), thereby ensuring rigidity for the main intake passage (1424a) and the sub-intake passage (1424b). Through this, the reliability of the intake muffler (142), including the main intake passage (1424a) and the sub-intake passage (1424b), can be increased even though the main intake passage (1424a) and the sub-intake passage (1424b) are formed outside the muffler body part (142a).

[0216] Meanwhile, another embodiment of the intake muffler is as follows.

[0217] That is, in the above-described embodiment, a plurality of intake passages are formed in a single muffler extension, but in some cases, a plurality of intake passages may be formed independently in each muffler extension.

[0218] FIG. 22 is a perspective view showing another embodiment of an intake muffler, FIG. 23 is a cross-sectional view showing the intake muffler of FIG. 22 assembled, and FIG. 24 is a cross-sectional view showing another embodiment of an intake passage in the intake muffler of FIG. 23.

[0219] The basic configuration of the intake muffler (142) according to the present embodiment is similar to the embodiments described above. For example, the intake muffler (142) may have a muffler inlet (1421), a muffler outlet (1422), a noise space (1423), and an intake passage (1424) formed inside it.

[0220] Additionally, the intake passage (1424) may include a main intake passage (1424a) and a sub-intake passage (1424b). The main intake passage (1424a) is formed to connect between the muffler inlet (1421) and the noise space (1423), and the sub-intake passage (1424b) may be formed so that its outlet (1424b2) connects to another noise space (e.g., a second noise space) (1423b) located downstream of the noise space (e.g., a first noise space) (1423a) to which the outlet (1424a2) of the main intake passage (1424a) communicates. Since the basic configuration of the main intake passage (1424a) and the sub-intake passage (1424b) and the resulting effects are similar to the embodiment of FIG. 21 described above, the description thereof will be replaced by the description of the embodiments described above.

[0221] However, as shown in FIGS. 22 to 24, in this embodiment, the main intake passage (1424a) and the sub-intake passage (1424b) may be formed spaced apart from each other. For example, a plurality of muffler extensions (1426) may be formed spaced apart from each other on the outer surface of the muffler body part (142a), and a main intake passage (1424a) may be formed through one of the plurality of muffler extensions (1426) (hereinafter, main side extension) (1428a), and a sub-intake passage (1424b) may be formed through the other muffler extension (hereinafter, sub side extension) (1428b).

[0222] In this case, as the main side extension (1428a) and the sub side extension (1428b) are separated from each other, the main suction passage (1424a) and the sub suction passage (1424b) can be separated from each other at least partially outside the muffler body (142a). Accordingly, heat exchange between the suction refrigerants passing through the main suction passage (1424a) and the sub suction passage (1424b), respectively, can be suppressed.

[0223] Specifically, the main suction passage (1424a) according to the present embodiment may include an inlet side passage section (1427a), an outlet side passage section (1427b), and an intermediate opening (1427c). The inlet side passage section (1427a) is formed in a pipe shape in the main side extension section (1428a) and the muffler body section (142a), the outlet side passage section (1427b) is formed in a pipe shape in the muffler body section (142a), and the intermediate opening (1427c) may be formed in the muffler body section (142a) such that at least a portion of the inlet side passage section (1427a) and the outlet side passage section (1427b) facing it are spaced apart. The main suction passage (1424a), including the inlet side passage (1427a), outlet side passage (1427b), and intermediate opening (1427c), is almost identical to the main suction passage (1424a) shown in the embodiment of FIG. 21 described above, so the description of the embodiment of FIG. 21 will suffice for this.

[0224] The sub-suction passage (1424b) may be formed by penetrating the interior of the sub-side extension (1428b). For example, the sub-side extension (1428b) may be extended as a single unit from the front cover (142c) or the rear cover (142d) as in FIG. 25, or it may be subsequently assembled to the front cover (142c) or the rear cover (142d) as in FIG. 26. In the embodiment of FIG. 25, the sub-suction passage (1424b) including the sub-side extension (1428b) can be easily formed, and in the embodiment of FIG. 26, the material and / or shape of the sub-side extension (1428b) can be varied to more effectively suppress the superheating of the suction refrigerant passing through the sub-suction passage (1424b).

[0225] One end of the sub-suction passage (1424b) is connected to the muffler inlet (or the middle of the main suction passage) (1421), and the other end of the sub-suction passage (1424b) can be connected to another noise space (e.g., a second noise space) (1423b) located downstream of the noise space (e.g., a first noise space) (1423a) to which the middle opening (1427c) of the main suction passage (1424a) is connected based on the refrigerant suction path. Accordingly, the suction refrigerant flowing from the muffler inlet (1421) toward the sub-suction passage (1424b) can move more quickly toward the muffler outlet (1422) than the suction refrigerant flowing from the muffler inlet (1421) toward the main suction passage (1424a).

[0226] In this case, the sub-suction passage (1424b) may be formed with an equal cross-sectional area between both ends, but smaller than or equal to the cross-sectional area of ​​the main suction passage (1424a). Accordingly, excessive flow of suction refrigerant from the muffler inlet (1421) toward the sub-suction passage (1424b) can be suppressed.

[0227] As described above, when the main suction passage (1424a) and the sub-suction passage (1424b) are individually formed in the respective muffler extensions (1426a) and (1426b), the main suction passage (1424a) and the sub-suction passage (1424b) may be spaced apart from each other by a predetermined distance. Accordingly, the suction refrigerant passing through the sub-suction passage (1424b) can be suppressed from being heated by the suction refrigerant passing through the main suction passage (1424a). Through this, the amount of refrigerant sucked into the compression chamber (130a) increases, thereby further improving the compressor performance.

[0228] Meanwhile, in the above-described embodiments, an indirect suction method in which the muffler inlet of the suction muffler (142) is spaced apart from the outlet of the suction pipe and communicates with the internal space of the shell was described as an example; however, the same can be applied to a direct suction method in which the suction pipe is sealed and directly connected to the muffler inlet (1421) of the suction muffler (142), as well as to a close suction method in which the suction pipe (115) is inserted into the muffler inlet (1421) of the suction muffler (142) with a pre-set gap.

[0229] However, in the direct suction method or the proximity suction method, the inlet (1424b1) of the sub-suction passage (1424b) may be formed to be located at the same or downstream side as the outlet of the suction pipe (115) based on the suction path of the suction refrigerant. Accordingly, a portion of the suction refrigerant sucked in through the suction pipe (115) can move from the muffler inlet (1421) toward the sub-suction passage (1424b) and then rapidly move toward the muffler outlet (or a noise space adjacent to the muffler outlet rather than the outlet of the main suction passage) (1422). The effects of this are replaced by the description of the aforementioned embodiments.

Claims

1. Shell; A cylinder provided in the internal space of the above shell; A piston configured to reciprocate in the above cylinder and form a compression section; A suction pipe joined by penetrating the above shell; and The suction muffler comprises a muffler inlet opening toward the suction pipe, a muffler outlet spaced apart from the muffler inlet and opening toward the cylinder, at least one noise space provided between the muffler inlet and the muffler outlet, and a suction passage that guides the refrigerant flowing in through the muffler inlet toward the muffler outlet. The above suction passage is composed of a plurality of suction passages, and the plurality of suction passages have different flow resistances in a reciprocating compressor.

2. In Paragraph 1, The above plurality of suction passages are, A reciprocating compressor in which each outlet is connected to a different noise space.

3. In Paragraph 1, The above plurality of suction passages are, A reciprocating compressor formed such that at least some parts have different cross-sectional areas.

4. In Paragraph 3, The above plurality of suction passages are, A reciprocating compressor in which the inlet cross-sectional area is formed differently based on the refrigerant suction path.

5. In Paragraph 4, Among the plurality of suction passages mentioned above, the inlet cross-sectional area of ​​the suction passage communicating with the downstream noise space based on the refrigerant suction path is, A reciprocating compressor formed with a cross-sectional area on the inlet side of the suction passage communicating with the upstream noise space that is smaller than the inlet side cross-sectional area.

6. In Paragraph 1, The above intake muffler is, A muffler body portion having at least one noise space; and It includes a muffler fixing part that extends from one side of the muffler body part and is fixed to the compression part, and The above muffler inlet is, A reciprocating compressor formed by penetrating the above-mentioned muffler body.

7. In Paragraph 6, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The inlet of the first suction passage and the inlet of the second suction passage are, Reciprocating compressors connected to each other in the same noise space.

8. In Paragraph 7, The inlet of the second suction passage mentioned above is, A reciprocating compressor formed to be located upstream of the inlet of the first suction passage based on the refrigerant suction path.

9. In Paragraph 6, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The first suction passage and the second suction passage are, A reciprocating compressor formed inside the intake muffler.

10. In Paragraph 9, A passage-forming portion is formed on the inner surface of the intake muffler above, protruding toward the noise space, and The above plurality of suction passages are, A reciprocating compressor formed by penetrating the interior of the above passage forming part.

11. In Paragraph 6, Among the plurality of suction passages mentioned above, at least one suction passage is, A reciprocating compressor formed on the outside of the intake muffler.

12. In Paragraph 11, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The above second suction passage is, A reciprocating compressor formed on the outer surface of the intake muffler.

13. In Paragraph 12, On the outer surface of the intake muffler, a connecting passage is formed in which both ends are recessed toward the noise space by a predetermined depth, and an inlet and an outlet are formed on both sides of the connecting passage. The above second suction passage is, A reciprocating compressor formed by a connecting member inserted into the above connecting passage to cover the space between the inlet section and the outlet section, or by a connecting member connecting both ends of the inlet section and the outlet section, respectively.

14. In Paragraph 11, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The above second suction passage is, A reciprocating compressor formed by penetrating the interior of a connecting member spaced apart from the outer surface of the muffler body.

15. In Paragraph 14, The inlet portion to which one end of the above-mentioned connecting member is connected and the outlet portion to which the other end of the above-mentioned connecting member is connected are A reciprocating compressor connected to different noise spaces in the above-mentioned muffler body.

16. In Paragraph 14, The inlet portion to which one end of the above connecting member is connected penetrates the muffler body portion and communicates with the noise space, and A reciprocating compressor in which the outlet portion to which the other end of the above-mentioned connecting member is connected penetrates the muffler fixing portion and communicates with the muffler outlet.

17. In Paragraph 6, An intake guide is attached to the muffler inlet mentioned above, and The above suction guide is, A reciprocating compressor having multiple guide passages formed separately from each other so as to communicate with the above multiple suction passages.

18. In Paragraph 17, The above-mentioned plurality of guide passages are, First guide passage; and It includes a second guide passage provided on one side of the first guide passage, and The above-mentioned first guide passage and the above-mentioned second guide passage are, A reciprocating compressor connected to the plurality of suction passages in the same noise space.

19. In Paragraph 18, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The above second guide passage is, A reciprocating compressor formed adjacent to the second suction passage than to the first suction passage.

20. In Paragraph 17, The above-mentioned plurality of guide passages are, First guide passage; and It includes a second guide passage provided on one side of the first guide passage, and The above-mentioned first guide passage and the above-mentioned second guide passage are, A reciprocating compressor independently connected to each of the above plurality of suction passages.

21. In Paragraph 20, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. A reciprocating compressor in which the first guide passage is connected to the first suction passage with at least one noise space in between, and the second guide passage is directly connected to the second suction passage.

22. In Paragraph 1, The above intake muffler is, A muffler body portion having at least one noise space as described above; A muffler fixing part extending from the muffler body part and fixed to the compression part; and It includes a muffler extension portion that extends from the outer surface of the muffler body portion and has the muffler inlet formed on one side, and The above plurality of suction passages are, A reciprocating compressor that penetrates the interior of the muffler extension and communicates with the muffler inlet.

23. In Paragraph 22, The above-mentioned muffler extension is formed such that at least a portion of it extends from each of the plurality of covers forming the muffler body and interlocks with one another. The above plurality of suction passages are, Reciprocating compressors formed separately from each other in the above-mentioned muffler extension.

24. In Paragraph 23, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. The above second suction passage is, A reciprocating compressor formed between two extensions extending from each of the above plurality of covers.

25. In Paragraph 24, The above second suction passage is, A reciprocating compressor formed with different cross-sectional areas along the refrigerant suction path.

26. In Paragraph 25, At least a portion of the cross-sectional area of ​​the second suction passage is, A reciprocating compressor formed with a cross-sectional area larger than that of the first suction passage.

27. In Paragraph 22, The above-mentioned muffler extension is formed by separating it into multiple parts, and The above plurality of suction passages are, A reciprocating compressor formed by penetrating the interior of each of the aforementioned multiple muffler extensions one by one.

28. In Paragraph 27, At least one of the plurality of muffler extension parts above is, A reciprocating compressor formed by extending as a single unit from one of the plurality of covers forming the muffler body.

29. In Paragraph 27, At least one of the plurality of muffler extension parts above is, A reciprocating compressor formed by subsequently assembling one of the plurality of covers forming the muffler body.

30. In Paragraph 22, The above plurality of suction passages are, First suction passage; and It includes a second suction passage provided on one side of the first suction passage, the outlet of which is connected to a noise space located downstream of the noise space to which the outlet of the first suction passage is connected. An intermediate opening is formed between the inlet and outlet of the first suction passage, penetrating between the inside and outside of the first suction passage, and The above intermediate opening is, A reciprocating compressor connected to a noise space located upstream of the noise space connected to the outlet of the second suction passage based on the refrigerant suction path.

31. In Paragraph 30, The above-mentioned first suction passage is, An inlet side passage opening toward the muffler inlet; and It includes an outlet-side passage that opens toward the muffler outlet, and The above intermediate opening is, A reciprocating compressor formed such that at least a portion between the inlet side passage and the outlet side passage is spaced apart.

32. In any one of paragraphs 1 through 31, The above suction pipe is connected to the internal space of the shell, and The above muffler inlet is, A reciprocating compressor spaced apart from the suction pipe and communicating with the internal space of the shell.

33. In any one of paragraphs 1 through 31, The above suction pipe penetrates the shell and is inserted into the muffler inlet, and Among the plurality of suction passages mentioned above, at least one suction passage is, A reciprocating compressor formed in alignment with the outlet of the suction pipe or formed downstream of the outlet of the suction pipe based on the refrigerant suction path.

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